Chung, Kyung-sook (1203-41 Sankyeog-Dong, Buk-Gu, Taegu-Metropolitan 702-869, KR)
| 1. | A loom having a plain loomtype structure, comprising: a warp supplying unit to feed many strands of warp yams from a creel to a weaving unit under a uniform tension, with a user passage being defined at a predetermined position around the warp supplying unit to allow a user to pass the loom; the weaving unit to guide the warp yams fed from the warp supplying unit so as to simultaneously weave two or more fabrics having same or different characteristics, couple the two or more fabrics together to produce a doubleply cloth or a threeply cloth, or join the two or more fabrics together at opposite ends thereof to produce a circular fabric, such as gunny cloth; and a cloth winder to roll the fabrics or the cloths fed from the weaving unit, whereby the circular fabric, the doubleply cloth, the threeply cloth, or the two or more fabrics are woven using a single loom. |
| 2. | The loom according to claim 1, further comprising a selvedge joining unit, the selvedge joining unit comprising: selvedge heating units provided at upper and lower portions of the selvedge joining unit to be operated while being in frictional contact with each other, each of the selvedge heating units comprising: a drive roller and a driven roller provided at opposite sides of each of the selvedge heating units, respectively; an insulation belt wrapped around the drive and driven rollers; a heater provided at a predetermined position of each of the selvedge heating units; and a cooling air nozzle provided at a predetermined position which is spaced apart from the heater, and having a plurality of air jet holes, the cooling air nozzle functioning to cool selvedges of the circular fabric which are joined together under high temperature and high pressure; an embossing roller installed at a predetermined position adjacent to the selvedge heating units; and a selvedge cutting roller installed at a predetermined position adjacent to the embossing roller, whereby the selvedges of the circular fabric are joined together while being embossed, and ends of the selvedges are thereafter uniformly cut. |
| 3. | The loom according to claim 1, wherein the weaving unit comprises: at least one semicircular harness repeatedly revolving around a center of the harness at a predetermined angle; one or more semicircular harness frames each having one or more pairs of semicircular harnesses; at least one linear harness reciprocating in a vertical direction; one or more linear harness frames each having one or more pairs of linear harnesses; and a reed reciprocating unit including: a crank rod; an intermediate drive shaft, with a lever being connected to the crank rod and a first side of the drive shaft at both ends thereof, and a pulling lever being connected to a second side of the drive shaft; a link connected to the pulling lever; a linear reciprocating shaft connected to the link; a reed provided at an end of the linear reciprocating shaft to arrange weft yams ; and a roller installed at a lower end of the reed to move along a guide plate during a linear reciprocating movement of the reed. |
| 4. | The loom according to claim 1, wherein the weaving unit comprises a harness and a harness frame both having a semicircular shape to repeatedly revolve around a center of the harness at a predetermined angle, the semicircular harness having two or three harness eyes to be selectively used, according to characteristics of a fabric or a cloth to be woven. |
| 5. | The loom according to claim 1, wherein the warp supplying unit comprises: upper and lower warp pulling units respectively provided at upper and lower portions of the warp supplying unit, each of the upper and lower warp pulling units having: a drive roller operated by a motor; and a driven roller operated while being in contact with the drive roller by a hydraulic or pneumatic cylinder actuator; a warp dropper bar and a tension roller installed at positions in back of each of the upper and lower warp pulling units; wherein warp yarns for an upper fabric are fed to an upper portion of the weaving unit through the upper warp pulling unit, and warp yarns for a lower fabric are fed to the weaving unit through the lower warp pulling unit and a guide roller provided at a lower portion of the warp supplying unit, with the user passage being defined between the warp supplying unit and the weaving unit by the warp yarns fed from upper and lower portions of the warp supplying unit to the weaving unit. |
Background Art As well known to those skilled in the art, a water jet loom or an air jet loom weaves only a strip of fabric. In case of a velvet loom to weave two strips of velvet fabrics, it is possible to simultaneously weave the two strips of velvet fabrics. However, since the two velvet fabrics are joined together by pile yarns, the two strips must be separated from each other, thus complicating production.
Further, a number of harness frames must be installed at the velvet loom, thus considerably reducing a weaving speed and thereby reducing productivity. The water jet loom, the air jet loom, and the velvet loom have problems in that it is impossible to weave the circular fabric, such as a gunny cloth.
Further, a conventional circular loom to weave the circular fabric, such as the gunny cloth, has a problem that weft yams are not disposed at desired positions during a weaving process, thus causing a weft irregularity, therefore
deteriorating the quality of the produced fabric. The conventional circular loom has other problems in that a lot of labor is needed and a large space is required to install the loom, in addition to the reduction of productivity.
The conventional circular loom has a further problem in that it is impossible to weave circular fabrics having various sizes with a single loom.
That is, only a circular fabric of a single size is obtained by a single circular loom.
In case of the conventional plain loom, it is impossible to weave two kinds of fabrics at a time with a single loom. Further, although weaving the same kind of fabrics, the amount of fabrics produced by a single loom does not reach the amount of fabrics produced by two or three looms within the same period of time.
Thus, productivity is considerably reduced. Further, it is impossible to simultaneously weave fabrics having same or different characteristics so as to produce a multipurpose fabric, such as the double-ply or three-ply cloth. Thus, the conventional loom does not provide a variety of fabrics.
Disclosure of the Invention Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a loom including a warp supplying unit, a weaving unit, and a cloth winder. In this case, the warp supplying unit functions to feed warp yams from a creel to the weaving unit under a uniform tension. The weaving unit appropriately guides the warp yams to weave two separate fabrics, a double-ply cloth, or a circular fabric. The two fabrics are coupled while maintaining a predetermined interval, thus producing the double-ply cloth. Further, selvedges of opposite ends of the two fabrics are joined together to form the circular fabric.
Further, the weaving unit may weave two fabrics having same or different characteristics and texture simultaneously. The cloth winder functions to roll the woven fabric.
In order to accomplish the above object, the present invention provides
the loom which includes semicircular harnesses and semicircular harness frames revolving around a center of each semicircular harness in a form of an arc, and includes linear harnesses and linear harness frames reciprocating in a vertical direction. In this case, each of the semicircular harnesses has two or three harness eyes to allow a fabric having upper and lower surfaces, such as the gunny cloth to be woven, and to allow two or three fabrics having same characteristics, or two or three kinds of fabrics having different characteristics, to be woven simultaneously. Meanwhile, the linear harnesses couple edges of upper and lower fabrics to produce the circular fabric, such as gunny cloth, and a double-ply cloth or three-ply cloth. The semicircular harnesses functions to minimize load and friction when warp yams for upper and lower fabrics are simultaneously guided from the warp supplying unit while forming a yarn passage for supplying weft yarns.
Another object of the present invention is to provide the loom which is designed such that the semicircular harnesses and the semicircular harness frames cooperate with the linear harnesses to weave fabrics having various structures and texture, including the circular fabric, the double-ply cloth, and three-ply cloth.
Further, according to this invention, one loom achieves the operational effects of two or more looms, thus increasing productivity and reducing costs.
In case of weaving the circular fabric, such as the gunny cloth made of a synthetic resin, the loom further includes a joining unit. The joining unit applies heat and pressure to selvedges of the circular fabric fed from the weaving unit, thus preventing the circular fabric from fraying when the circular fabric is in use.
In this case, the selvedges of the circular fabric are firmly joined, thus increasing reliability.
Brief Description of the Drawings The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description
taken in conjunction with the accompanying drawings, in which: FIG. 1 is a sectional view of a loom, according to an embodiment of the present invention; FIG. 2 is an enlarged sectional view showing a weaving unit included in the loom of FIG. 1 ; FIG. 3 is an enlarged sectional view showing linear harness frames and semicircular harness frames included in the weaving unit of FIG. 2; FIGS. 4a to 4c are sectional views showing the operation of harnesses; FIG. 5 is an enlarged view of the part A shown in FIG. 2; FIG. 6 is an enlarged sectional view of a selvage joining unit included in the loom of FIG. 1 ; and FIG. 7 is a plan view of the selvage joining unit shown in FIG. 6.
Best Mode for Carrying Out the Invention Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components.
A better understanding of the present invention may be obtained through the following example which is set forth to illustrate, but is not to be construed as the limit of the present invention.
As shown in FIG. 1, a loom 100 according to the present invention includes a warp supplying unit 1, a weaving unit 2, and a cloth winder 5. The warp supplying unit 1 functions to feed many strands of warp yams 101 from a creel 100'to the weaving unit 2 under a uniform tension. According to the embodiment of this invention, 1600 strands of warp yams 101 are usually used.
But, the number of strands of the warp yams 101 are adjustable according to a width of a desired woven fabric. A user passage 7 is defined at a predetermined position around the warp supplying unit 1 to allow a user to pass the loom 100.
The weaving unit 2 appropriately guide the warp yams 101 fed from the
warp supplying unit 1 so as to simultaneously weave two or more fabrics having same or different characteristics, couple the two or more fabrics together to produce a double-ply cloth or a three-ply cloth, or join the two or more fabrics together at opposite ends thereof to produce a circular fabric, such as a gunny cloth.
The cloth winder 5 functions to roll the fabrics or the cloths fed from the weaving unit 2. Further, the loom 100 of this invention may further include a selvedge joining unit 3 to weave the circular fabric, such as the gunny cloth.
The selvedge joining unit 3 applies heat and pressure to selvedges of the fabrics woven by the weaving unit 2, thus preventing the selvedges of the circular fabric from fraying when the circular fabric is in use.
The warp supplying unit 1 includes upper and lower warp pulling units 12 and 12'. The upper and lower warp pulling units 12 and 12'are respectively provided at upper and lower portions of the warp supplying unit 1. Each of the upper and lower warp pulling units 12 and 12'has a drive roller 11, and a driven roller 11'. In this case, the drive roller 11 is operated by a motor 1', and the driven roller 11'is operated while being in contact with the drive roller 11 by a hydraulic or pneumatic cylinder actuator 10. A warp dropper bar 13 and a tension roller 14 are installed at positions in back of each of the upper and lower warp pulling units 12 and 12'. Of the warp yarns 101 fed to the weaving unit 2, the warp yams 101 for an upper fabric are fed to an upper portion of the weaving unit 2 through the upper warp pulling unit 12, whereas the warp yams 101 for a lower fabric are fed to the weaving unit 2 through the lower warp pulling unit 12' and guide rollers provided at a lower portion of the warp supplying unit 1. The user passage 7 is defined between the warp supplying unit 1 and the weaving unit 2 by the warp yams 101 fed from upper and lower portions of the warp supplying unit 1 to the weaving unit 2.
As shown in FIGS. 2 and 3, the weaving unit 2 includes, at an upper portion thereof, semicircular harnesses 21 and one or more pairs of semicircular harness frames 21'. The semicircular harnesses 21 repeatedly revolve around
the center thereof at a predetermined angle. Linear harnesses 22 and one or more pairs of linear harness frames 22'are installed at positions around the semicircular harnesses 21 and the semicircular harness frames 21'to reciprocate in a vertical direction. The semicircular harness frames 21'having the semicircular harnesses 21 are connected to first rods 24 of first cranks 23 which are mounted to a first crank box 25, so as to be rotated at the predetermined angle.
The linear harness frames 22'having the linear harnesses 22 are placed in front of the semicircular harness frames 21', and are connected to second rods 24'of second cranks 23'which are mounted to a second crank box 25', so as to be reciprocated in the vertical direction. A reed 66 to thrust and arrange the weft yarns, and a reed reciprocating unit 6 to reciprocate the reed 66 are installed at predetermined positions around the semicircular harness frames 21'.
As shown in FIG. 5, the reed reciprocating unit 6 includes a crank rod 61, and an intermediate drive shaft 62. A lever 63 is connected at both ends thereof to the crank rod 61 and a first side of the drive shaft 62. A pulling lever 63'is connected to a second side of the drive shaft 62. A link 64 is connected at a first side thereof to the pulling lever 63'. A linear reciprocating shaft 65 is connected to a second side of the link 64 to be linearly reciprocated. The reed 66 is installed at an end of the linear reciprocating shaft 65 to arrange the weft yarns. A roller 67 is installed at a lower end of the reed 66 to stably move along a guide plate 68 during a linear reciprocating movement of the reed 66.
As shown in FIGS. 4a to 4c, each of the semicircular harnesses 21 has two or three harness eyes 27 so as to guide the warp yams 101 for the upper and lower fabrics, respectively, and simultaneously weave two or more fabrics. The fabrics are joined together to produce the circular fabric, the double-ply cloth, or the three-ply cloth. On the other hand, in the case of weaving the circular fabric, such as the gunny cloth, the linear harnesses 22 function to feed the warp yarns 101 to edges of the upper and lower fabrics so that the edges of the upper and lower fabrics are coupled together. Further, in the case of weaving the double- ply cloth or the three-ply cloth, the linear harnesses 22 function to couple the
upper and lower fabrics together. As such, when the two fabrics are woven simultaneously, or the double-ply or the three-ply cloth is woven, two or three weft feeding units are required.
In order to apply a uniform tension to the warp yams 101 and minimize a load and friction when the warp yams 101 for the upper and lower fabrics are guided through the semicircular harnesses 21 and the semicircular harness frames 21'while forming weft yarn passages 28 and 28', the semicircular harnesses 21 and the semicircular harness frames 21'have a semicircular shape.
The cloth winder 5 functions to uniformly roll the fabric or the gunny cloth fed from the weaving unit 2, and includes a pair of winding rollers 53 and 53'and a guide roller 54 which are driven by a motor 51 and a reduction unit 52.
When two fabrics having same or different texture and characteristics are wound separately, it is preferable that one of the winding rollers 53 and 53'is placed on an upper portion of the cloth winder 5, while a remaining one of the winding rollers 53 and 53'is placed on a lower portion of the cloth winder 5. Such a construction is equal to the construction of conventional cloth winders.
In case of weaving the circular fabric, such as the gunny cloth, using a synthetic resin, it is preferable that the selvedge joining unit 3 is provided between the weaving unit 2 and the cloth winder 5 to firmly join the selvedges of the circular fabric. As shown in FIG. 6, the selvedge joining unit 3 includes at upper and lower portions thereof selvedge heating units 33 which are operated while being in frictional contact with each other. Each of the selvedge heating units 33 includes at opposite sides thereof a drive roller 31 and a driven roller 31', respectively. An insulation belt 32 is wrapped around the drive and driven rollers 31 and 31'of each of the selvedge heating units 33. A heater 34 is provided at a predetermined position of each of the selvedge heating units 33. A cooling air nozzle 36 is provided at a predetermined position which is spaced apart from the heater 34 of each of the selvedge heating units 33, and has a plurality of air jet holes 35. The cooling air nozzle 36 functions to cool the selvedges of the circular fabric which are joined together under high temperature
and pressure. An embossing roller 37 is installed at a predetermined position adjacent to the selvedge heating units 33. A selvedge cutting roller 38 is installed at a predetermined position adjacent to the embossing roller 37.
Therefore, the selvedge joining unit 3 allows the selvedges of the circular fabric to be firmly joined together while being embossed, and thereafter allows ends of the selvedges to be uniformly cut.
The reference numeral 29 of FIG. 2 denotes a fabric guide roller, and the reference numeral 39 of FIG. 7 denotes an operation step-board.
The loom 100 of this invention overcomes the drawbacks of the circular loom for weaving only the circular fabric and the plain loom for weaving only the plain fabric, thus being capable of weaving the circular fabric, the double-ply cloth, the three-ply cloth, or two or more fabrics having same or different characteristics. Therefore, the loom 100 of this invention accomplishes the operational effects of two or more looms, thus increasing productivity and reducing costs, in addition to improving the quality of produced fabrics.
The operation of the loom according to the present invention will be described in the following in detail.
Many strands of the warp yams 101 are fed from the creel 100'through the upper and lower warp pulling units 12 and 12'which are installed at the upper and lower portions of the warp supplying unit 1, to the weaving unit 2. At this time, the warp yams 101 fed through the upper warp pulling unit 12, pass through the harness eye 27 which is formed on the upper portion of each of the semicircular harnesses 21. On the other hand, the warp yams 101 fed through the lower warp pulling unit 12', pass through the harness eye 27 which is formed on the lower portion of each of the semicircular harnesses 21. Further, the warp yams 101 for coupling the selvedges of the fabric and coupling the upper and lower fabrics pass through the linear harnesses 22.
The semicircular harness frames 21'comprise an even number of two or more. The semicircular harness frames 21'are respectively connected to the first rods 24 of the first cranks 23 installed at the first crank box 25 so that the
semicircular harness frames 21'are repeatedly rotated around a shaft S at a predetermined angle in opposing directions to define the weft yarn passages 28 and 28'. In this case, the shaft S supports the semicircular harness frames 21'.
On the other hand, the linear harness frames 22'function to join the selvedges of the upper and lower fabrics together or couple the upper and lower fabrics while maintaining a predetermined interval between the upper and lower fabrics. In this case, the linear harness frames 22'are appropriately selected, according to the kinds of the fabrics to be woven, for example, the circular fabric, the double- ply cloth, and the three-ply cloth.
In a brief description, the upper and lower fabrics are woven simultaneously by the semicircular harness frames 21'and the semicircular harnesses 21 which have the harness eyes 27 at upper and lower portions of each of the semicircular harnesses 21, whereas the selvedges of the upper and lower fabrics are coupled together to weave the circular fabric, the double-ply cloth, or the three-ply cloth by the linear harness frames 22'and the linear harnesses 22.
When it is desired to weave three fabrics simultaneously, the semicircular harnesses 21 which have the harness eyes 27 at upper, middle, and lower portions of each of the semicircular harnesses 21, are used.
Further, when the warp yams 101 pass two or three harness eyes 27 formed at each of the semicircular harnesses 21 without passing the linear harnesses 22 and the linear harness frames 22', two or three fabrics are woven simultaneously, thus increasing productivity. In this case, when using different kinds of warp yams 101, two or more kinds of fabrics having different characteristics are obtained simultaneously, thus accomplishing the operational effects of several looms with a single loom.
In a detailed description of this invention, when it is desired to weave two plain fabrics simultaneously, the warp yarns 101 are fed to the weaving unit 2 through the harness eyes 27 which are formed at the upper and lower portions of each of the semicircular harnesses 21.
The semicircular harnesses 21 are repeatedly rotated around the shaft S
which support the semicircular harness frames 21', at a predetermined angle, thus defining the upper and lower weft yarn passages 28 and 28'. In this case, two weft feeding units are respectively placed at the weft yarn passages 28 and 28'so as to simultaneously feed weft yams to the weaving unit 2, thus weaving two fabrics simultaneously.
Further, when it is desired to weave three plain fabrics simultaneously, the semicircular harnesses 21 having three harness eyes 27 at upper, middle, and lower portions of each of the semicircular harnesses 21 must be used. Further, three weft feeding units must be placed at desired positions.
Meanwhile, when it is desired to weave the circular fabric, such as the gunny cloth, warp yams 101 for coupling the selvedges of the upper and lower fabrics which are woven simultaneously, are fed through the linear harnesses 22 to the weaving unit 2.
The loom 100 of this invention is provided with the reed 66 which thrusts the weft yarns in such a way as to produce a fabric having uniform density, thus being capable of weaving the circular fabric of a much better quality, in comparison with the circular fabric woven by the conventional circular loom. Further, the loom 100 of this invention has a high weaving speed, thus increasing productivity, and reduces labor and a space for installing the loom, thus reducing costs.
It is possible to directly use the circular fabric woven as described above without an additional treatment. However, in order to increase durability and reliability of the circular fabric, the selvedge joining unit 3 may be installed between the weaving unit 2 and the cloth winder 5. The selvedge joining unit 3 applies heat and pressure to the selvedges of opposite ends of the circular fabric fed from the weaving unit 2 so as to firmly join the selvedges of the circular fabric, and thereafter cools the selvedges of the circular fabric. Next, the selvedges of the circular fabric are pressed by the embossing roller 37 which has an embossed outer surface. The selvedges of the circular fabric are thus more firmly joined. Subsequently, in order to enhance marketability of the circular
fabric, ragged edges of the circular fabric are cut. Thereafter, the circular fabric is wound around the cloth winder 5.
Meanwhile, when it is desired to obtain a finished product immediately after weaving process of the circular fabric, a cutter and a sewing unit may be installed following the selvedge joining unit 3.
As described above, the loom 100 of the present invention is designed such that the semicircular harnesses 21 cooperate with the linear harnesses 22 so as to simultaneously weave two or three fabrics, couple the two or more fabrics together while maintaining the predetermined interval between the fabrics, or weave fabrics having different texture and different kinds of fabrics, using a single loom, thus increasing productivity, improving quality of the produced fabrics, and providing various fabrics.
Industrial Applicability As described above, the present invention provides a loom having a plain loom-type structure, which is capable of weaving a circular fabric, improves a quality of a produced fabric, increases productivity, and reduces labor and a space for installing the loom, thus considerably reducing costs, and which is capable of weaving various fabrics, including a double-ply cloth and a three-ply cloth, and which is capable of weaving two or more fabrics simultaneously, thus increasing productivity even when weaving a plain fabric.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.