VENEER HORIZONTAL JOINTING MACHINE

Technical field

The invention relates to the field of wood processing technology, in particular to an embryo loading device used for the veneer horizontal jointing machine.

Background technique

A technical solution involving an embryo loading device with a rolling shaft and a horizontal roller used for the veneer horizontal jointing machine has been used previously in the wood veneer processing industry (Fig. la) comprises a pair of rollers close to each other, having a cohesive structure and the same horizontal shaft perpendicular to the guide bar that are arranged under the sliding table and the circle of the rollers tangential to the surface of the sliding table are rotated round in the direction of rolling of the guide bar. Above the pair of the rollers is a pair of rolling wheels, each of which has an independent horizontal shaft which is not perpendicular to the guide bar and deviates from the rollers by an angle about 2 - 5 degrees, when viewed from the top, two shafts of the rolling wheel create an obtuse angle about 184 to 190 degrees in the front of the direction of the guide bar. A pair of free-rotating rolling wheels (not driven) can be shrugged up and pressed down at the same time and adjusted to press on the rollers with adjustable pressure.

When the machine operates, two veneer sheets loaded on the ends of the guide bar will be fed into the machine by two rolling wheels on the top and two rollers on the bottom. With this structure, two veneer sheets are rolled into the machine in the direction of the guide bar, at the same time are spliced together at two opposite sides at the thickness thereof.

The disadvantage of this solution is that the rolling wheel and rollers have no parallel shaft each other, so when the machine operates, they only interact with each other at one point via the veneer sheet, thus not creating a stable effect and not easy to use.

Also known is the embryo loading device that has a rolling wheel arranged on the surface of a rotating disc (Fig. lb) comprises two vertical round discs arranged side by side on both sides of the guide bar, behind a workpiece loading mouth (workpiece consists of two veneer sheets), the upper side of two round discs is a rough surface that is placed on par with the machine’s sliding table and is driven in opposite directions. When viewed from the direction of loading the workpiece, the left round disc rotates counterclockwise and the right round disc rotates clockwise . Above the two sides of the rotating disc is a pair of free-rotating rolling wheels (not driven) having a cohesive structure and the same rotating shaft, the rolling wheel shaft is horizontal and perpendicular to the guide bar, parallel to the radial straight line of both sides of the rotating disc, the rolling shaft does not cut vertically with the rotating disc shaft but deviates back (according to the direction of the guide bar) a distance from 2 mm to 5 mm. The pair of rolling wheels can be shrugged up and pressed down at the same time and adjusted to press on the outside rim of the disc with adjustable pressure.

When the machine operates, two veneer sheets loaded on the ends of the guide bar will be rolled into the machine by two rolling wheels on the top and two rotating discs on the bottom. With this structure, two veneer sheets are rolled into the machine in the direction of the guide bar, at the same time two opposite sides at the thickness thereof are spliced together.

The disadvantage of this solution is that while the machine is operating, the underside of the veneer sheet will be exposed and rubbed against the upper rough surface of the rotating disc, which will be peel and produce fine wood dust. This fine wood dust accumulates and attaches to many other parts of the machine, so it takes effort to clean, especially fine wood dust that easily falls into the glue container to damage the glue. In addition, fine wood dust also scratches seams of the veneer sheets, especially when the thickness of the veneer sheet is high, the friction between the veneer sheets with the surface of the disc will be higher. Moreover, due to the pair of rolling wheels are cohesive together, so that in case two veneer sheets have uneven thickness, it will lose the squeezing effect in thinner veneer sheets.

Technical nature of the invention

The invention proposes an embryo loading device used for the veneer horizontal jointing machine (hereinafter referred to as the machine) with the function of receiving and rolling two veneer sheets into the machine at the same time, simultaneously joining two glued sides of each other. Two veneer sheets are always opposite each other, allows the machine always achieve a stable squeezing effect, a layer of glue applied on the surface of two veneer sheets is evenly, helping the seams of two veneers are aligned without extruding, scratching or peeling.

In order to achieve the above-mentioned purpose, the embryo loading device used for veneer horizontal jointing machine according to this invention is characterized in that comprising: a clutch gear wheel and a rolling wheel part. According to the first embodiment of the invention, the first different factor of the embryo loading device according to the invention is that the clutch gear wheel part formed by two shaped box frames, a pair of clutch gear wheels, two drive shafts and gears.

Two shaped box frames are installed side by side and opposite each other on both sides of the guide bar, under a sliding table of the machine and behind the mount of feeding splint (also as workpiece loading mouth). The upper side of the shaped box frame is arranged a flat sliding surface mounted on par with the sliding table of the machine on two sides of the guide bar, wherein one shaped box frame on one side of the guide bar can be adjusted higher than the sliding table surface a distance that corresponds to the thickness of the veneer sheet. The maximum distance is about 5mm in case of the veneer sheet with a thickness from 1.5 to 5mm and it can not bend when it comes into the gluing stage in the operation process of the machine.

A pair of equally designed clutch gear wheels are rotationally driven by the same number of revolutions in the direction of rolling the workpiece into the machine and arranged opposite each other in two shaped box frames placed side by side on both sides of the guide bar, under the sliding table of the machine and behind the workpiece loading mouth. Each clutch gear wheel is installed in a separate shaped box frame and driven by gears so that two clutch gear wheels can rotate in the same direction with the same number of revolutions. The shaft of each clutch gear wheel is inclined, upwards on the small diameter of the clutch at an angle equal to the taper of the clutch wheel, so that the birth path of the cone is tangent from below and on par to the surface of the sliding table. The taper of the clutch wheel and the inclination of the clutch shaft is ranged from 0.1 to 89.9 degrees.

The two clutch gear wheels are close to the guide bar bulkhead on the both sides of the guide bar and opposite each other via the large diameter of the cone, on the cone surface of the clutch gear wheel is roughen. At the small conical end of the clutch wheel is a bevel gear that is rotated by the bevel gear with a vertical shaft, the lower end of this vertical shaft fitted with a transmission gear that is connected to the gear of the shaped box frame on the other side of the guide bar and rotationally driven by the motor.

A further different factor of the embryo loading device according to the first embodiment of the invention is that the rolling wheel part is formed by a pair of equal double rolling wheels and arranged on a pair of clutch gear wheels.The horizontal shaft of the pair of double rolling wheels is perpendicular to the guide bar and are arranged opposite each other on both sides of the guide bar. A pair of free-rotating double rolling wheels (not driven) can be shrugged up and pressed down with adjustable pressure.

Each of the double rolling wheel with a separate shaft and two thin rolling wheel is characterized in that comprising:

+ A main rolling wheel and an auxiliary rolling wheel rotating separately without adhere each other and are arranged a distance each from other to make the width of each double rolling wheel is equivalent to the length of birth path on the cone of each clutch wheel;

+ A round surface of the main and auxiliary rolling wheel is smooth or rough with a roughness from small to large to suit the actual effect;

+ Two main rolling wheels of two double rolling wheels are linked together via a polycentric coupling, so that they can always rotate with the same number of revolutions.

The double rolling wheels are made up of a rolling wheel rim which can be rotated around a fixed shaft by linking each other with two bearings. The surface around the rolling wheel rim has two parts: the large diameter part used to install the main rolling wheel, between the main rolling wheel and the large diameter surface of a rolling wheel rim is padded with a rubber ring pad with a function of making the main rolling wheel can be shrugged up and pressed down eccentrically with the shaft when operating.

The auxiliary rolling wheel is a circular rim, the outside diameter thereof being equal to the outside diameter of the main rolling wheel, that can freely rotate by linking between a bearing and a surface of the inside small d iameter of the rolling wheel rim. Between the auxiliary rolling wheel and the outer round surface of the bearings of the auxiliary rolling wheel is also padded with a rubber ring pad with the function of making the auxiliary rolling wheel can be shrugged up and pressed down eccentrically with the rolling wheel rim when operating.

A double rolling wheel on one side of the guide bar can be adjusted to lift up corresponding to the height of a shaped box frame at the same side in case of necessity. On the opposite side of two main rolling wheels and between two double rolling wheels is two sliding pins, that are spaced at a distance so that the center of the main rolling wheel becomes the midpoint of straight segment between two sliding pins.

Between the two main rolling wheels is arranged a coin shaped polycentric coupling, on the surface of the coin ofthe polycentric coupling there are four sliding grooves arranged evenly and faced into the center, the width of the sliding groove fits snugly with the sliding pin on the side face of each main rolling wheel and the length of the sliding groove meets the stroke back and forward, enough that when this coupling mechanism operates, it will has the function of making the two main rolling wheels always rotate with the same number of revolutions, even if eccentrically each other with the deviation corresponding to the maximum thickness of the veneer sheets.

When the machine operates, two veneer sheets are loaded on either side of the feeding splint on either side of the guide bar and are blocked by two embryo positioning cylinders, two veneer sheets are pressed down from above by a pair of clutch gear wheels arranged under the surface of the sliding table and two double rolling wheels , at the same time two heads of the embryo positioning cylinder leave away from the surface of the sliding table when receiving a signal from the photoelectric sensor receiving workpiece (sensor), that to make two veneer sheets to be rolled and put into the machine, and at the same time pressed the two sides of the two veneer sheets together by the impact of the conical surface of the two clutch gear wheels to make the two veneer sheets both move into the machine in the direction of the guide bar and horizontal drift toward the big conical head (the ratio of taper degrees as higher the level of horizontal drift toward the big conical head as more) until the sides of two veneer sheets pressed close to both sides of the guide bar bulkhead of the guide bar and moving into the machine.

Two main rolling wheels of the two double rolling wheels are pressed close to both sides of the guide bar bulkhead , the upper side corresponds to the conical surface at the big end of the two clutch gear wheels bottom, that always rotate with the same number of revolutions to create the press down effect to make the clutch gear wheel effective, at the same time to keep the two veneer sheets moving at the same speed, even in case of the veneer sheets with a large thickness that can not be bent when moving through the glue applicator.

The two auxiliary rolling wheels is outside the two double rolling wheels , on both sides of the guide bar corresponding to the conical surface at the small end of the two clutch gear wheels below, that is able to shrug up and press down along the same shaft with the main rolling wheel of the double rolling wheels, at the same time is also able to shrug up and press down independently to create a continuous downward pressure effect to make the clutch gear wheel below effective, even in case the surface and thickness of the veneer sheet are not equal. One more further proposed subject of the invention is that two double rolling wheels of the rolling wheel part of the embryo loading device according to the invention are replaced by two clutch rolling wheels.

The distinctive factor of the embryo loading device part according to the second embodiment of the invention whereby the two clutched rollers are replaced for the two rolling wheels in the first embodiment, that are designed to be opposite each other, having the same shape as the two clutched wheels in the first embodiment, but the taper and the shaft tilt can be equal to or less than or bigger more than the taper of the clutch in the below clutch gear wheel part, the thickness and the diameter of the clutch wheel can be equal or smaller or bigger more than the clutch in the below clutch gear wheel part. The horizontal shaft is tilted toward the small conical end with an inclination equal to the taper. The conical surface of the clutch roller can be smooth or rough with a roughness from small to large so that the effect is consistent with the reality. Two clutch rollers can rotary round freely no driven and no polycentric coupling, wherein a clutch roller can be lifted high when operating in the case of veneer sheet with a large thickness.

Brief description of the Figures/drawings

Fig.1a- is a perspective drawing showing the embryo loading device used for the veneer horizontal jointing machine according to the known technical solution with a rolling shaft and a horizontal roller are deviate from each other and Fig. lb- is a perspective drawing showing the rolling mechanism arranged on the surface of the rotating disk that is used for the veneer horizontal jointing machine according to the known technical solution.

Fig.2a- is a drawing showing a vertical projection on the left and Fig. 2b- is a drawing showing the vertical projection in front of the veneer horizontal jointing machine using the embryo loading device according to the invention.

Fig.3- is a perspective drawing showing the detailed composition of the embryo loading device according to the invention with the guide bar.

Fig.4- is a perspective drawing showing the detailed composition of the embryo loading device according to the invention with the guide bar but without the sides and the upper side of two shaped box frames.

Fig.5- is a drawing showing a vertical projection in front of the embryo loading device according to the invention. Fig.6a- is a drawing showing a structure cross section of two double rolling wheels and a polycentric coupling and Fig. 6b - is a perspective drawing showing the detailed composition of the two double rolling wheels and a polycentric coupling in the embryo loading device according to the invention.

Fig.7- is a drawing showing a vertical projection on the left of the embryo loading device according to the invention that is linked with other parts in the veneer horizontal jointing machine.

Fig.8a- is a drawing showing a projection above two shaped box frames with the clutch gear wheel arranged under the guide bar and Fig.8b- is a drawing showing a vertical cross section on the left shaped box frame below the guide bar together with the other parts of the embryo loading device according to the invention.

Fig.9a- is a perspective drawing of the guide bar in the embryo loading device according to the invention used for thin veneer sheet and Fig. 9b- is a perspective drawing of the guide bar in the embryo loading device according to the invention used for thick veneer sheet.

Fig.10- is a drawing showing the vertical projection in front of the embryo loading device according to the invention when the right shaped box frame with the clutch gear wheel and the double rolling wheel is lifted.

Fig.11a- is a perspective drawing showing the movement of the polycentric coupling when two double rolling wheels are concentrically operated together and Fig. l ib- is a perspective drawing showing the movement of the polycentric coupling when two double rolling wheels are eccentrically operated together in the embryo loading device according to the invention.

Fig.12- is a perspective drawing showing the embryo loading device according to a second embodiment of the invention, wherein the two double rolling wheels are replaced by the two clutched rollers.

Fig.13- is a drawing showing the projection in front of the embryo loading device according to a second embodiment of the invention, wherein the two double rolling wheels are replaced by the two clutched rollers with related parts, the right clutch gear wheel and clutched roller are lifted.

Fig.14- is a drawing showing the projection in front of the embryo loading device according to a second embodiment of the invention, wherein the two double rolling wheels are replaced by the two clutched rollers with related parts such as: sliding rails, drives sliding rails, compression cylinder and lifting cylinder.

Fig.15 - is a perspective drawing showing the embryo loading device according to the invention with the guide bar which is loading two thin veneer sheets.

Fig.16- is a perspective drawing showing the embryo loading device according to the invention that is loading two thick veneer sheets with the guide bar but without the feeding splint, the glue splint.

Fig.17- is a perspective drawing showing the embryo loading device according to a second embodiment of the invention using two clutched rollers instead of two double rolling wheels that is loading two thin veneer sheets.

Fig.18- is a perspective drawing showing the embryo loading device according to a second embodiment of the invention using two clutched rollers instead of two double rolling wheels that is loading two thick veneer sheets.

List of reference numbers in the pictures:

1 Machine body

2 Sliding table: 2.1 Guide bar; 2.1.1 Guide bar bulkhead; 2.1.2 Feeding splint; 2.1.3 Glue splint; 2.1.4 Pads ; 2.1.5 Cover piece ; 2.2 Glue applicator ; 2.3.8T lower left wheel

3 Clutch gear wheel part : 3T Left shaped box frame;3P Right shaped box frame; 3.1 Clutch wheels ;3.1,1 Clutch gear ; 3.1.2 Clutch gear shaft ;3,2 Drive shaft ; 3.2.1 Clutch gear ; 3.2.2 Gears; 3.3 Pinion

4 Rolling wheel part :4K Double rolling wheels; 4.1 Rolling wheel rim;4.1.1 Rolling wheel shaft; 4.1 , 1 C Clutch roller shaft ; 4.1.2 Sliding pin; 4.1.3 Bearing ; 4.1 C Clutched roller ; 4.2 Main rolling wheel ; 4.2.1 Main rolling o’ring gaskets; 4.3 Auxiliary rolling wheel ;4,3.1 Auxiliary rolling wheel o’ring gaskets ; 4.4 Polycentric coupling ; 4.5 Sliding rails ; 4.5.1 Drives sliding rails ; 4.5C The back of sliding rails ; 4.5, 1C Sliding bearing

5 Upper Hinge chain part: 5.1 Upper tension frame; 5.1.1 Horizontal platform; 5, 1.2 Pads ; 5.2 Upper horizontal sprocket ;5,3T Left rolling wheel ; 5.3PRight rolling wheel 5.3P; 5.4 Middle horizontal roller ; 5.5 Pair of end horizontal rollers 6 Under hinge chain parts: 6.1 Under tension frame; 6.2 Horizontal wheel; 6.3 Horizontal wheel

7 Vertical screw; 7.1 Vertical pillar

X1 Embryo positioning cylinder ; X2 Positioning cylinder; X3 Compression cylinder;

X4Lifting cylinder

SI photoelectric sensor receiving workpiece Detailed description

Detailed structure of the embryo loading device used for the veneer horizontal jointing machine according to the first embodiment of the invention are described in detail together with the drawings FIGs.2- 14.

According to Figs.2a-2b, the veneer horizontal jointing machine (hereinafter referred to as the machine) using the embryo loading device according to the invention has a structure including a machine body 1, a sliding table 2, a clutch gear wheel part 3 and a rolling wheel part 4.

The machine body 1 has an inverted C-shape with the inlet part to be compatible with the standard width size of the finished veneer boards. The 2- wide sliding table is arranged below the underside of the inverted C of the machine body.

The embryo loading device according to the invention is made up of the clutch gear wheel part 3 and the rolling wheel section 4.

The clutch gear wheel part 3 is located at the under part of the inverted C-shape of machine body 1 that is on par with the surface of the sliding table 2, the rolling wheel part 4 is located at the upper part of the inverted C-shape of the machine body 1 , the guide bar 2.1 is arranged between of the two clutch gear wheels 3.1 having the guide bar bulkhead 2.1.1 , so that two veneer sheets can be loaded at the same time and two opposite sides thereof are glued together, sliding at both sides of the guide bar bulkhead 2.1.1. The rolling wheel part 4 is arranged above the clutch gear wheel part 3.

According to Figs 3- 5, the clutch gear wheel part 3 of the embryo loading device according to the invention is arranged below both sides of the guide bar 2.1, so that two sides of the sliding table 2 are on par with the upper surface of the sliding table 2 of the machine. The left shaped box frame 3T and the right shaped box frame 3P are placed opposite and close each other, the plane above two box frames is mounted on par with the surface of the sliding table 2 of the machine and on two sides of the guide bar 2.1. The ceiling side of each shaped box frame has an empty space for being fitted snugly and be on par with the part of the protruding wing of the guide bar 2.1. The facade inside of the two walls close each other of the left shaped box frame 3T and the right shaped box frame 3P are designed beveled from the bottom up, in inclined direction out side an angle of about 10 degrees and two leaning wall opposite sides inside of two box frames has a hole for fitting the clutch wheel 3.1.

A pair of the clutch gear wheels 3.1 comprises two equal clutch wheels with degree of a clutch about 10 degrees are designed to be opposite each other, one clutch wheel is arranged inside the right shaped box frame 3P and another clutch wheel is arranged inside the left shaped box frame 3T, that are close with both sides of the guide bar bulkhead 2.1.1 of the guide bar 2.1. The conical surface of the clutch wheel is roughened, each of the small conical ends of each clutch wheel is the clutch gear 3.1.1, that is rotated round the clutch gear shaft 3.1.2 by linking with two bearings in the middle part of the shaft. One end of the clutch gear shaft 3.1.2 is fixed perpendicular to the vertical surface inclined at an angle of about 10 degrees inside of the shaped box frame vertical wall, so that the clutch gear shaft 3.1.2 is horizontal perpendicular to the guide bar 2.1 and inclined down the large end of the cone at an angle of about 10 degrees, allows the birth path on the conical surface where the tangent to the slip surface on the box frame is always on par with the slip surface. (Figs.4-5)

Two identical drive shafts 3.2 are arranged vertically and opposite each other, one drive shaft is arranged in the left shaped box frame 3T and the other one is arranged in the right shaped box frame 3P. On top of each drive shaft 3.2 is fitted with a clutch gear 3.2.1. The clutch gear 3.2.1 has the number of teeth that match the number of the teeth of the clutch gear 3.1.1 is arranged at the head of the clutch wheel 3.1 to transmit through the shaft of the clutch gear shaft 3.1.2 with an angle of about 80 degrees. The part between the two drive shafts 3.2 is arranged the gears 3.2.2 that match the gear and has the same number of teeth of each drive shaft 3.2 is arranged in the shaped box frame on the other side of the guide bar. The lower part of the two drive shafts 3.2 is fitted with two bearings mounted in two ball-bearings (not shown in the Fig.), each ball- bearing is fastened to the floor surface of each box frame where there is a hole matches the ball- bearing.

The pinion 3.3 is fitted with motor Ml to drive the gears 3.2.2 of the drive shaft 3.2 that is arranged in the left shaped box frame 3T and then forward through the gears 3.2.2 of the drive shaft 3.2 that is arranged in the right shaped box frame 3P so that the clutch gear 3.1.1 with the same number of revolutions, but in opposite direction and the same transmission through the clutch gear 3.1.1 to make the two clutch wheels 3.1 opposite each other have the same number of revolutions and is rotated in the same direction (Fig.5).

Motor Ml is a deceleration motor that is fastened to the underside of the left shaped box frame 3T, the pinion 3.3 is connected to the motor shaft of the motor Ml via a device similar to a bike tweezer (not shown in the Fig.) that has rotary drive function.

The rolling wheel part 4 of the embryo loading device according to the first embodiment of the invention is formed by a pair of two dual rolling wheels 4K that comprises a rolling wheel rim

4.1 having a separate shaft with two thin rolling wheels, a main rolling wheel 4.2, an auxiliary rolling wheel 4.3, a polycentric coupling 4.4 and a sliding bar 4.5.

A pair of two dual rolling wheels 4K equal are arranged upper the pair of the clutched wheels 3.1, a horizontal shaft of the double rolling wheels 4Kare perpendicular to the guide bar 2.1 and opposite to the two sides of the guide bar bulkhead 2.1.1. The pair of two double rolling wheels 4K rotating freely without the transmission can be shrugged up and pressed down with adjustable pressure. Each double rolling wheels 4K has a separate shaft that is made up of a rolling wheel rim 4.1 that can rotate round the rolling wheel shafts 4.1.1 by linking between two bearings. The rolling wheel shafts 4.1.1 are fitted on the inside surface of the lower body of the sliding bar 4.5.

The round surface around the rolling wheel rim 4.1 has two parts: the large diameter part of the rolling wheel rim is used to install the main rolling wheel 4.2, between the main rolling wheel and the surface of the large diameter of rolling wheel rim 4.1 fitted a main rolling oring gaskets 4.2. lin rubber.

The main rolling oring gaskets (oring) 4,2.1 are fitted into the groove on the surface of the large diameter part of the rolling wheel rim 4.1, having the function makes the main rolling wheel

4.2 to be shrugged up and pressed down eccentrically with the shaft of the rolling wheel when it is operating, the outer edge of the large diameter part there is a blocking rim that keeps the main rolling wheel 4,2 to be not skewed outwards (Fig. 5).

An auxiliary rolling wheel 4.3 is a circular rim with the outside diameter as the same as the outside diameter part of the main rolling wheel 4.2 and can be freely rotated by linking the bearing with the surface of the small diameter part of the rolling wheel rim 4.1. Between the round surface inside the auxiliary rolling wheel 4.3 and outer round surface of the bearing of the auxiliary rolling wheel 4.3 padded an auxiliary rolling wheel oring gaskets 4.3. lin rubber.

The auxiliary rolling wheel o’ring gaskets(oring) 4.3.1 is fitted into the groove on the inside surface of the auxiliary rolling wheel 4.3 having the function to make the auxiliary rolling wheel 4.3 to be shrugged up and pressed down eccentrically with the rolling wheel rim 4.1. when it is operating. On the side surface of the large diameter of the rolling wheel rim 4.1 has two sliding pin 4.1.2 are set apart one from other a empty space so that a center of the main rolling wheel rim becomes the midpoint of a straight line between the two sliding pins.

The main rolling wheel 4.2 and the auxiliary rolling wheel 4.3 have the outside diameter as the same, the round surface of main rolling wheel 4.2 and the auxiliary rolling wheel 4.3 are made smoothly or rough with small to large roughness, in accordance with the actual effect. The main rolling wheel and the auxiliary rolling wheel are rotated separately, without adhere each other and spaced a distance to create the width from the main rolling wheel 4.2 to auxiliary wheel 4.3 a distance corresponding to the length of birth path on each clutch cone 3.1.

The polycentric coupling 4.4 is arranged between two main rolling wheels 4.2 and close each other. The polycentric coupling 4.4 has a coin shape, on the face of the polycentric coupling 4.4 there are four sliding grooves that are arranged evenly and all are facing to the center. The width of the sliding groove is fitted snugly with the sliding pin on the side face of each rolling wheel rim 4.1 and the length of the sliding groove meet the forward and backward movement, to enough so that when the polycentric coupling 4.4 in working, two main rolling wheels 4.2 of two dual rolling wheels 4K are always in motion at the same time and have the same number of revolutions, even when they are eccentric (max about 5mm).

Two sliding rails are installed into two drive sliding rails 4.5.1, the upper body of each sliding rails 4.5 is fixed to the head of a compression cylinder X3, with the function to make two dual rolling wheels 4K to be pressed down the upper face of the veneer sheets with adjustable pressure.

According to Figs.6a-6b, the polycentric coupling 4.4 is arranged between two dual rolling wheels 4K. A pair of two dual rolling wheels 4.4 that comprises the parts assembled in the following order: outer ring - auxiliary rolling wheel 4.3- bearings - inner ring - main rolling wheels 4.2- rolling wheel shaft 4.1.1- auxiliary rolling wheel oTing gaskets 4.3.1- main rolling o’ring gaskets 4.2.1 - rolling wheel rim 4,1- shaft seal ring- polycentric coupling 4.4 and sliding pin 4.1.2. According to Fig.7, the clutch gear wheel part 3 of the embryo loading device according to the invention is arranged below two guide bars 2.1, the upper side of the guide bar 2.1 is on par with the upper surface of the sliding table 2 of the machine body 1. The rolling wheel part 4 of the embryo loading device according to the invention is arranged at the upper the clutch gear wheel part 3 and is attached to the horizontal platform 5.1.1 at the head of the upper tension frame 5.1 of the hinge chain parts above 5. A horizontal shaft rolling wheel on left 5.3T front and a horizontal shaft rolling wheel on right 5.3P behind are arranged above the glue applicator 2.2 of the machine. Below the horizontal shaft rolling wheel on left 5.3T there is left wheel and below the horizontal shaft rolling wheel on right 5.3P there is a right wheel (not shown in the

Fig·)·

Opposite via the guide bar 2.1 and the horizontal shaft rolling wheel on right 5.3P is arranged a cover piece 2.1.5 that is bent in the middle in the shape of a dome, the upper surface of the cover piece 2.1.5 put on par with and connected to the bottom edge of the slot in the bend and the two dome edges connected to the surface of the sliding table 2 of the machine body 1 of the machine that is used to lift up the veneer sheet to curve of the slot, and also to cover the head of the glue applicator 2.2 that is put along the same side of the guide bar 2.1. Under the surface of sliding table 2 of machine body 1 and the guide bar 2.1 and on the glue splint 2.1.3 is arranged a glue storage box (not shown in the Fig.). Two feeding splint 2.1.2 on both sides of the guide bar can be curved into a wide mouth for easy loading of two veneer sheets at the same time.

At the end part of the guide bar 2.1 there is a pair of horizontal wheel 6.2 arranged under the surface of the sliding table 2. The outer circle of the horizontal wheel 6.2 is tangential to the upper surface of the sliding table 2. On the horizontal wheel 6.2 is arranged a horizontal shaft gear 5.4 that is pressed from top to bottom with adjustable pressure.

The hinge chain part above 5 comprises an upper tension frame 5.1, which is driven by two upper horizontal sprockets 5.2. The hinge chain part above 5 can be adjusted forward and down by two vertical screws 7 driven to rotary in the same direction, at the same speed by the chain drive (chain).

The two screw drives of two vertical screws 7 are fastened to the upper tension frame 5.1 of the upper hinge chain parts 5 and each screw drive has a sliding ball bearing that is linked to a vertical pillar 7.1, which is symmetric and the same with the upper hinge chain parts 5. The under hinge chain parts 6 has the same structure as the upper hinge chain parts 5 and it is arranged symmetrically with the upper hinge chain parts 5 and is installed permanently under the sliding table 2 of the machine body 1. The upper outer surface of the under hinge chain parts 6 is stretched on par with the surface of the sliding table 2 of the machine bodyl, the under outer surface of the upper hinge chain parts 5 is stretched and exposed a distance by the thickness of the veneer sheets in comparison with the surface of sliding table 2. The under hinged chain parts 6 can be moved by two under tension frame 6.1. When viewed from above in the direction of loading the veneer sheet, the two lines of the upper and under hinge chains are stretched without parallel each other, and between them there will be a small distance that as deeper will be as narrower, in the middle of this distance there is arranged the heating device to dry the glue (not shown in the Fig.).

The mechanism of the pair of end horizontal wheel 6.3 and the pair of end horizontal rollers 5.5 that is at behind of the machine and that has the function of bringing the connected veneer board through the sliding table 2 out from the machine to receive the finished product.

The pair of the clutch gear wheels 2.1, a left wheel of the left rolling wheels 5.3T and a right wheel of the right rolling wheels 5.3P below the surface of the sliding table 2 of machine body 1 together with the middle horizontal wheel pair 6.2 and the end horizontal wheel pair 6.3 are rotating driven to move the veneer board across to the surface of the sliding table 2 of machine body 1 with a speed of about from 30m/ min to 40m/min as the same as the speed of the upper hinge chain parts 5 and the under hinge chain parts 6.

All of the left rolling wheel 5.3T at front, the right rolling wheel 5.3P at behind, the middle horizontal roller 5.4 and the pair of end horizontal rollers 5.5 are fixed to upper tension frame 5.1 of the upper hinge chain parts 5 so that when the upper hinge chain parts 5 are lifted all the above-mentioned rolling-wheel mechanisms are also lifted too.

According to Fig. 8a, two shaped box frames with a clutch gear wheel in the clutch gear wheel parts 3 of the embryo loading device according to the first embodiment of the invention are installed below and on either side of the guide bar 2.1 on the surface of the sliding table 2. On the outer edge the upper face of the left shaped box frame 3T and the right shaped box frame 3P there are holes to fix vertical edges outside the shaped box frames by bolts. Also, on the upper side of the right shaped box frame 3P also has a circular hole used to mount the photoelectric sensor receiving workpiece S1. The inner edge of the surface of the two shaped box frames has a empty space to fit snugly with the protruding wings on either side of the guide bar 2.1 and in the middle of each wing there is a sufficient space to fit the clutch wheel 3.1 of the clutch gear wheel parts 3 of the embryo loading device according to the invention.

According to Fig. 8b, the clutch gear wheel 3.1 is arranged to protrude on par with the upper face of the left shaped box frame 3T and is below the guide bar 2.1 together with the guide bar bulkhead 2.1.1, the feeding splint 2.1.2 and the glue splint 2.1.3. The end head of the left shaped box frame 3T and the right shaped box frame 3P have holes for fitting snugly with the cylinder head of the positioning air cylinder X2 so that the cylinder head can protrude up and down off the upper face of the shaped box frame and two bodies of this cylinder are fitted on the under face of two shaped box frames 3T and 3P. A reducer motor M1 is fitted to the under face of the left shaped box frame 3T and is connected to the gear 3.3 via the motor shaft.

According to Fig 9a, the guide bar 2.1 used for loading the thin veneer embryo comprises the guide bar bulkhead 2.1.1, on both sides of middle part of the guide bar bulkhead is clamped by two feeding splint 2.1.2 , and the glue splint 2.1.3 is attached to the end of the guide bar bulkhead 2.1.1. The under left side in front of the glue splint 2.1.3 is cut into a round sphere and the vertical edge of the guide bar 2.1 just below the left gap of the round sphere at the mouth of the glue splint 2.1.3 is cut into forming a horizontal spherical shape, the lower right side behind the glue splint 2.1.3 is also cut into a spherical sphere and the vertical edge of the guide bar 2.1 just below the right gap of the round sphere at the mouth of the glue splint 2.1.3 is also cut into a horizontal spherical shape.

All the underside of the feeding splint 2.1.2 and the glue splint 2.1.3 are combined with the vertical faces of two sides of the guide bar 2.1.1 and the upper face on both sides of the guide bar 2.1 are formed two guide slots on both sides of the guide bar 2.1 with a height of guide slots enough so that the thin edge of the veneer sheet slides in the guide slot easily, the bottom side of each guide slot where bent a spherical shape is fitted a cover piece 2.1.5 that is above the glue applicator 2.2 and is fitted snugly into the horizontal gap of the spherical shape on the sides of the guide bar with the right front and the left behind according to the guide bar 2.1, each cover pierce 2.1.5 is bent to be a bottom of the guide slot with the circular sphere so that the two ends of the circular sphere of the cover pierce 2.1.5 are connected to the surface of the sliding table 2.Two wings on the sides of the guide bar 2.1 have two gaps equal each other to fit the clutch wheel 3.1 that is mounted to the upper horizontal surface of two shafts (Fig.7).

Fig.9b is showing a perspective view of the guide bar 2.1 used for thick veneer sheets that comprises only the guide bar bulkhead 2.1.1, without two feeding splints 2.1.2 on either side of the middle part of the bulkhead and also without the glue splint 2.1,3 at the end of the guide bar bulkhead 2.1.1. The vertical side on the right side of the guide bar 2.1 is carved into a horizontal sphere, the left wing of the guide bar 2.1 is carved out to fit the clutch gear 3. Ion the left.

According to Fig.10, when the veneer embryo has a thickness of 1.2mm to 5mm, the right clutch wheel 3.1 is lifted to 5mm thanks to the lifting cylinder X1 in the clutch wheel part 3 that is arranged under the surface of sliding table 2, at the same time, the dual rolling wheel with the right rolling shaft 4.1.1 is also lifted to 5mm thanks to the lifting cylinder X4 in the rolling wheel part 4 that is arranged on the surface of sliding table 2 so that the veneer sheet on the right to be higher than the veneer sheet on the left about 5mm when they are loaded into the machine.

According to Figs.12-13, the embryo loading device used for the veneer splicing machine according to the second embodiment of the invention, wherein two clutched rollers 4.1C are replaced for the two dual rolling wheels 4K according to the first embodiment of the invention.

These two clutched rollers 4.1C are arranged opposite each other and designed like to the form with the two clutched rollers in the first embodiment, but the taper and tilt of the shaft thereof may be equal to or less than or bigger than the taper of the clutch wheel in the lower gear section, and the thickness and diameter of the clutch wheel may also be equal to or smaller or bigger than the clutch wheel 3.1 in the clutch gear wheel parts 3 below. The inclined direction of the shaft is coinciding with the inclined direction of the clutch wheel 3.1.

The conical surfaces of the clutched rollers 4.1C are made smooth or rough with a roughness of less or more so that the effect is consistent with reality. The clutch roller 4.1C is rotated freely, without driving by the clutch roller shaft 4.1.1C, that is linked via two bearings, which are fastened to the under end of each sliding rail 4.5C with the inclined vertical surface so that the clutched roller 4.1 C is also inclined to the small conical head about 10 degrees so that the birth path where the contact with the surface of the veneer board is always horizontal corresponding and symmetrical with the clutch wheel 3.1 in the clutch gear wheel part 3, which is arranged below the sliding table 2.

Two clutched rolling wheels 4.1C opposed each other via two sliding rails 4.5C are arranged opposite each other and near side by side. Two clutched rolling wheels 4.1C can slide up and down together on two back faces of two clutched rolling wheels 4.1C thanks to the two sliding rails 4.5.1C that are fitted horizontal into the vertical side in the sides of two empty spaces on the horizontal platform 5.1 ,1, the head on each sliding rail is arranged a horizontal bar with a hole used to fix the accumulator tip of the compression cylinder X3, while the left side of the base of the compression cylinder X3 is fixed to the left of the pad 5.1.2 and the right side of the base of the compression cylinder X3 is fixed to the base of the lifting cylinder X4.The head of the lifting cylinder X4 facing down is fitted to the right of the pad 5.1.2, the leg of the pad 5.1.2 is fixed on the horizontal platform 5.1.1 while lifting cylinder X4 is controlled up lower to load a veneer sheet during the machine operating.

According to Fig.14, the embryo loading device according to the second embodiment of the invention, wherein a head of the lifting cylinder X4 facing upwards is fitted to the right of the pad 5.1.2, the leg of the pad 5.1.2 is fixed on the horizontal platform 5.1.1 while the lifting cylinder X4 is lifted up high so that the right clutched rollers 4.1C can also be lifted up high about 5mm and the right clutched wheel 3.1 in the right box frame 3P with the other related parts in the clutch gear wheel parts 3 are also lifted up high 5 mm to operate when loading thick veneer board.

Describe the operation of the embryo loading device according to the invention

According to Figs 15-18, when the machine is operated with loading and without loading, the rolling wheel part 4 of the embryo loading device according to the invention is lifted up by two compression cylinders X3.

Other parts such as: the upper hinge chain parts 5 with the left wheel 5.3T and the right rolling wheel 5.3P, the pair of rolling wheels 5.4 and the pair of rolling wheels 5.5 are lowered by two vertical screws 7 far from the surface of the sliding table 2 a distance that is smaller than the thickness of the veneer sheet.

The parts under the surface of sliding table 2 include: a pair of clutched wheels 3.1 , two wheels (not shown in Figs), a pair of middle horizontal sprockets 6.2, two crawlers 6.2 together with a chain in the under hinge chain parts 6, two crawlers 5.1 together with the chain in the upper hinge chain parts 5 and a pair of end horizontal sprockets 6.3 are moved in circular motion to the direction of the rolling veneer sheet into the machine following the direction of the guide bar 2.1.

Two veneer sheets are loaded at the same time into the feeding splint at the head of guide bar 2.1 until the leading edge of the two veneer sheets is blocked by two heads of the embryo positioning cylinder XI, the same time the photoelectric sensor receiving workpiece S 1 transmits a signal so that in a second later (the time is predetermined) two heads of the embryo positioning cylinder XI leave the upper surface of the left shaped box frame 3T and right shaped box frame 3P down on par with the face of the sliding table 2, simultaneously the two double rolling wheels 4K of the rolling wheel part 4 is pressed down the upper face of the two veneer sheets by two workpiece compression cylinders X3 with the appropriate adjusted pressure. When the underside of the veneer sheet contacted with the two clutched wheel 3.1 are rotating to the direction of rolling into the machine to make two veneer sheets at the same time moving into the machine to the direction of the guide bar 2.1 and horizontal drifting toward the big head of each clutch wheel 3.1 until the sides of the two veneer sheets are pressed close to the sides of the guide bar bulkhead 2.1.1, at the same time moving into the machine.

Two main rolling wheels 4.2 of two double rolling wheels 4K close to both sides of the upper guide bar bulkhead 2.1.1, the upper side corresponds to the conical surface at the big end of the two clutch gear wheels 3.1 below, that always rotate with the same number of revolutions to create a press down effect to make the clutch gear wheel effective and at the same time also to keep the two veneer sheets always moving at the same speed.

The two auxiliary rolling wheels 4.3 of the two double rolling wheels 4K corresponds to the conical surface at the small end of the two clutch gear wheels 3.1 that presses down to create a circumference difference effect between the small end and the big end of the clutch gear wheel 3.1, in addition to the ability to shrug up and press down together with the rolling wheel shafts 4.1.1 arranged on each side of the dual rolling wheels 4K due to moving of the compression cylinder X3 via the sliding rail 4.5 , the main rolling wheel 4.2 and the auxiliary wheel 4.3 that can shrug up and down slightly off eccentricity to the rolling wheel shafts 4.1.1 thanks to two main rolling o’ring gaskets 4.2.1 and auxiliary rolling wheel oring gaskets 4.2.1 and 4.3.1 in rubber to stabilize the interaction efficiency of the main rolling wheel 4.2 with auxiliary rolling wheel 4.3 even though the thickness and smoothness of uneven veneer sheets.

After passing through out the embryo loading device according to the invention, the veneer workpieces continues to move through the glue applicator 2.2, the left edge face of the veneer sheet is glued by the glue roller (not shown in the Fig.) on the right of the guide bar 2.1 when the edge of this veneer sheet is kept by the lower left wheel 2.3.8T and the left rolling 5.3T with horizontal glue roller on the right of the guide bar 2.1 while the edge of the veneer sheet is bent according to section of the spherical guide slot above the right glue roller, followed by the right side of the veneer edge is glued by the glue roller (not shown in the Fig.) to the left of the guide bar 2.1 when the edge of the veneer sheet is kept by the lower right wheel 2.3.8P on the right below and the right wheel 5.3P on the horizontal side with the glue roller on the left of the guide bar 2.1, while at the edge of the left veneer sheet is curved in a circular spherical slot above the left glue rolling shaft.

After passing through out the glue applicator, thanks to a pair of the middle horizontal sprockets 6.2 below and a pair of the middle horizontal roller 5.4 above, the veneer sheet is moved through out the heating device (not shown in the Fig.) arranged between the two double hinged chains of the upper hinge chain parts 5 and the under hinge chain parts 6 for drying glue. After being heated to dry the glue, the two veneer sheets are stuck together into a large veneer board and is brought out by the end horizontal wheel below 6.3 and a pair of end horizontal rollers 5.5 and rolled out.

When the edge of the large veneer board passes out the embryo loading device, the photoelectric sensor receiving workpiece S 1 transmit the signal to open up the double rolling wheels 4K in the rolling wheel part 4, at the same time two heads of embryo positioning cylinder XI protruded up from the surface of the left shaped box frame 3T and the right shaped box frame 3P to load a next veneer workpieces. The machine can connect horizontal the veneer sheet one with another until the width of the two finished veneer boards are on par to the indentation of the C-shape of the machine.

The embryo loading device in accordance with the second embodiment of the invention, whereby the two clutched rollers 4.1C are replaced for the double rolling wheels 4K in the rolling wheel part 4. When the machine operated, the clutched rollers 4.1 C is press down on the surface of the veneer sheet to ensure that the effect of the clutched wheel 3.1 is promoted as mentioned above, that is rolled while also is pressed down on the surface of the moving veneer sheet so that also to create the effect for the veneer sheet drifting horizontal toward the big conical head of the clutched wheels 4.1C that makes the sides of the veneer sheet always be leaned against each other and be slid on both sides of the guide bar 2.1 as the same effect of the clutched wheel 3.1. The difference from the operation of the machine in accordance with the first embodiment of the invention is that the two clutched rollers 4, 1C are not connected to each other to move with the same number of revolutions with the double rolling wheels 4K, that is connected each other via the polycentric coupling 4.4.

The beneficial effects can be achieved

The use of the embryo loading device for a veneer horizontal jointing machine according to the invention has the beneficial effects as follows: - Allows the machine to load the workpiece at the same time also to put two veneer sheets in the same direction at the same speed, in order to achieve high efficiency when pressing the two veneer sheets faced each other and leaned on the sides of the guide bar before the two veneer sheets continue to go through the other parts of the machine.

-Allow the seams of the veneer sheets to be aligned without extruding and the machine always operates stably.

- With a stable pressure effect when sliding on both sides of the guide bar, allowing the glued side of the veneer sheet when passing through the glue applicator is always contacted stably with the round surface of the glue splint , so that the glue on the edge of the veneer sheet has equal thickness, without thick or thin segment.

- The contacting part of the upper and lower surface of the veneer sheets with the rolling wheels and the rollers is very few, and the sliding friction between the rollers and the lower surface of the veneer sheet is very low, so that the veneer sheet has no scratches and chipped peels.