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Title:
A HATCH FOR THE ACCESS TO A ROTATING DRUM, PARTICULARLY FOR MACHINES FOR PROCESSING LEATHER, TEXTILES AND THE LIKE
Document Type and Number:
WIPO Patent Application WO/2020/148647
Kind Code:
A1
Abstract:
A hatch (1) for access to a rotating drum (2), particularly for machines for processing hides, fabrics, and the like, which includes at least one movable panel (10) slidingly supported in a frame (20) associated with the drum (2), defining at least one closed position, in which the panel (10) obstructs an opening (3) provided in a circumferential wall (4) of the drum, and at least one open position, in which the panel (10) clears the opening; the frame (20) includes a guiding means (21a, 21 b) which is slidingly engaged with the panel (10) to guide its circumferential sliding in the transition between the closed position and the open position.

Inventors:
GECCHELE FABIO (IT)
ZORDAN MANUEL (IT)
Application Number:
IB2020/050262
Publication Date:
July 23, 2020
Filing Date:
January 14, 2020
Export Citation:
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Assignee:
GECCHELE FABIO (IT)
ZORDAN MANUEL (IT)
International Classes:
C14B17/00; C14C15/00; D06F37/10
Foreign References:
CN108277305A2018-07-13
US3240038A1966-03-15
US1295830A1919-02-25
CN101608247A2009-12-23
Attorney, Agent or Firm:
FORATTINI, Amelia (IT)
Download PDF:
Claims:
CLAIMS

1. A hatch (1 ) for access to a rotating drum (2), particularly for machines for processing hides, fabrics, and the like, comprising at least one movable pane! (10) which is slidingly supported in a frame (20) associated with said drum (2), defining at least one closed position, in which said panel (10) obstructs an opening (3) provided in a circumferential wall (4) of said drum (2), and at least one open position, in which said panel (10) clears said opening; characterized in that said frame (20) comprises a guiding means (21 a, 21 b) which is slidingly engaged with said panel (10), said guiding means being adapted to guide a circumferential sliding of said panel (10) in the transition between said closed position and said open position.

2. The hatch according to claim 1 , characterized in that said guiding means (21 a, 21 b) comprises at least one pair of tracks (21 a, 21 b) which are arranged parallel to each other on two opposite sides of said opening (3), said tracks (21 a, 21 b) extending along respective circular arcs with a radius of curvature that substantially corresponds to the radius of curvature of said circumferential wall (4).

3. The hatch according to one or more of the preceding claims, characterized in that it comprises a border (22) joined to said tracks (21 a, 21 b) and associated with said drum (2) at said opening, said border (22) being adapted to cooperate with said panel (10) in the hermetic closure of said opening.

4. The hatch according to one or more of the preceding claims, characterized in that said panel (10) comprises at least one sheet-like body (1 1) associated with a supporting structure (12a, 12b) constituted by at least one pair of lateral posts (12a, 12b) joined by first crossmembers (13), said posts extending along respective circular arcs with a radius of curvature that substantially corresponds to the radius of curvature of said circumferential wall (4).

5. The hatch according to one or more of the preceding claims, characterized in that said panel (10) comprises a first sliding means (14) associated with said posts (12a, 12b) and engaged slidingly with said tracks (21 a, 21 b).

6. The hatch according to one or more of the preceding claims, characterized in that it comprises a balancing means (30) adapted to facilitate the movement of said panel (10) in the transition between said closed position and said open position.

7. The hatch according to one or more of the preceding claims, characterized in that said balancing means (30) comprises a plurality of counterweights (31 ) made integral with said panel (10) by substantially rigid tension members (32a, 32b) joined to said posts (12a, 12b); said tension members (32a, 32b) extending as an axial extension of said posts (12a, 12b) along respective circular arcs with a radius of curvature that substantially corresponds to the radius of curvature of said circumferential wall (4).

8. The hatch according to one or more of the preceding claims, characterized in that said counterweights (31 ) are in a diametrically opposite position with respect to said panel (10).

9. The hatch according to one or more of the preceding claims, characterized in that it comprises a second sliding means (33) associated with said counterweights (31) and with said tension members (32a, 32b), said second sliding means (33) being engaged slidingly with said tracks (21a, 21 b).

10. The hatch according to one or more of the preceding claims, characterized in that said first sliding means (14) and said second sliding means (33) comprise a plurality of wheels (14, 33), which can rotate about respective axes which are substantially parallel to said circumferential wall (4).

1 1. The hatch according to one or more of the preceding claims, characterized in that it comprises a means (15) for locking said panel (10) at least in said closed position.

12. The hatch according to one or more of the preceding claims, characterized in that it comprises grip means (16) adapted to facilitate the movement of said panel (10) in the transition between said closed position and said open position.

Description:
A HATCH FOR THE ACCESS TO A ROTATING DRUM, PARTICULARLY FOR

MACHINES FOR PROCESSING LEATHER, TEXTILES AND THE LIKE

The present invention relates to a hatch for access to a rotating drum, particularly for machines for processing hides, fabrics, and the like.

As is known, many machines for tanneries or for the textile industry are equipped with a rotating drum, with a horizontal rotation axis, within which the products undergo the various processing steps provided for them.

The drum is generally constituted by a substantially cylindrical hollow body, which forms a compartment the inside of which is accessed through an opening provided on the circumferential wall of the body.

The opening is normally closed by a door which, during the loading of the drum, is opened completely, while during the processing of the products it is closed hermetically.

Essentially two systems for the movement of the door are known: a first system provides for the hinging of the door to the drum, about hinge axes which are transverse to the rotation axis of the drum; a second system instead provides for a tangential sliding of the door, along a direction that is substantially parallel to the axis of rotation of the drum.

Despite being advantageous in many respects, door movement systems according to the prior art have some drawbacks which are still unresolved.

In particular, a first drawback is to be found in the fact that, in both cases, in order to open the door and render the inside of the drum accessible, it is necessary to occupy additional space, besides the space already occupied by the machine.

When the door is hinged to the drum, the transition from the closed position to the open position and vice versa in fact requires the oscillation of the door in the space that surrounds the machine.

Even if the machine has a sliding door, things do not improve; in fact, if one wishes to provide, on the drum, an opening that is large enough to make the loading/unloading operations easy, it is necessary to provide an equally large door, however, in this manner, when it opens it protrudes laterally from the drum. Furthermore, it should be considered that the doors currently mounted in commercially available machines often turn out to be difficult to maneuver, whether they are of the hinged or laterally sliding type.

The aim of the invention is to solve the problems described above, providing a hatch for access to a rotating drum, particularly for machines for processing hides, fabrics, and the like, that has a compact structure, in order to reduce the space occupation of the machine to which it is applied.

Within the scope of this aim, an object of the invention is to provide a hatch that allows to perform the operations for loading/unloading the products in the machine, while remaining within the space occupied by the machine itself, therefore without occupying additional surrounding space.

Another object of the invention is to provide a hatch having a particularly easy and functional motion.

Another object of the invention is to provide a hatch which, by virtue of its particular constructive characteristics, is capable of giving the greatest assurances of reliability and safety in use.

This aim, as well as these and other objects which will become better apparent hereinafter, are achieved by a hatch for access to a rotating drum, particularly for machines for processing hides, fabrics, and the like, comprising at least one movable panel which is slidingly supported in a frame associated with the drum, defining at least one closed position, in which the panel obstructs an opening provided in a circumferential wall of the drum, and at least one open position, in which the panel clears the opening; characterized in that the frame includes guiding means which is slidingly engaged with the panel, the guiding means being adapted to guide a circumferential sliding of the panel in the transition between the closed position and the open position.

Further characteristics and advantages will become better apparent from the description of a preferred but not exclusive embodiment of a hatch according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:

Figure 1 is a perspective view of a component of a hatch according to the invention; Figure 2 is a perspective view of another component of the hatch according to the invention;

Figure 3 is a side view of the component of the preceding figure;

Figure 4 is a sectional view of Figure 3, taken along the plane IV-IV;

Figure 5 is an enlarged-scale view of a detail of the component of Figure 1 ;

Figure 6 is a perspective view of a machine fitted with the hatch according to the invention.

With reference to the figures, a hatch according to the invention, generally designated by the reference numeral 1 , includes a panel 10 which is slidingly supported in a frame 20 associated with a drum 2, defining at least two positions: a closed position, in which the panel 10 obstructs a loading/unloading opening 3 provided in a circumferential wall 4 of the drum 2, and an open position, in which the panel 10 clears the opening 3.

In the specific case, the drum 2 includes a substantially cylindrical hollow body which is rotatably mounted on a machine 5 adapted to process hides, fabrics, and the like; however, it is evident that according to other embodiments of the invention which are not shown, the drum 2 might have different shapes and/or be mounted on machines assigned to uses that are different from the one indicated herein without thereby modifying the inventive concept on which the invention is based.

According to an important aspect of the present invention, the frame 20 is provided with a guiding means which slidingly engages the panel 10 for its circumferential sliding in the transition between the closed position and the open position.

In a preferred embodiment, the guiding means includes a pair of tracks 21a and 21 b which are coupled to the drum 2 and are arranged parallel to each other on two opposite sides of the opening 3.

More precisely, the tracks 21 a and 21 b have a hollow profile, for example with a transverse cross-section that is substantially shaped like a reclined C or H, and are extended along respective circular arcs with a radius of curvature that substantially corresponds to the radius of curvature of the circumferential wall 4. At the opening 3, first ends of the tracks 21 a and 21 b are fixed to a border 22 which is coupled to the drum 2 and is designed to cooperate with the panel 10 in the hermetic closure of the opening 3.

The panel 10 is formed by a supporting structure on which a sheetlike body 1 1 is mounted, having a curvature which substantially follows the radius of curvature of the circumferential wall 4.

In the illustrated example, the supporting structure of the panel 10 is constituted by a pair of posts 12a and 12b which are arranged parallel to each other on two opposite sides of the panel 10 and are joined by means of first crossmembers 13.

The posts 12a and 12b extend along respective circular arcs with a radius of curvature that substantially corresponds to the radius of curvature of the circumferential wall 4.

Advantageously, the posts 12a and 12b are provided with a first sliding means, constituted for example by wheels 14 which are freely mounted on the posts, with axes of rotation that are substantially parallel to the circumferential wall 4.

The wheels 14 can engage in the tracks 21 a and 21 b in order to facilitate the sliding of the panel 10 with respect to the frame 20.

According to another aspect of the invention, the hatch 1 includes a balancing means 30 adapted to facilitate the movement of the panel 10 in the transition between the closed position and the open position.

In a preferred embodiment, the balancing means 30 are constituted by a number of counterweights 31 which are made integral with the panel 10 by means of substantially rigid tension members 32a and 32b which are joined to the posts 12a and 12b and fixed to each other by means of second crossmembers 17.

In this embodiment, the counterweights 31 consist of one or more metallic bars with such a weight as to balance at least partially the weight of the panel 10.

More precisely, the tension members 32a and 32b are extended axially, as an extension of the posts 12a and 12b, along respective circular arcs with a radius of curvature that substantially corresponds to the radius of curvature of the circumferential wall 4. Preferably, the length of the tension members 32a and 32b is such that the counterweights 31 are arranged in a position that is diametrically opposite with respect to the position of the panel 10.

Advantageously, also the tension members 32a and 32b and the counterweights 31 also are provided with a second sliding means, conveniently constituted for example by wheels 33 which are mounted idle on the tension members, with rotation axes that are substantially parallel to the circumferential wall 4.

Also the wheels 33 can engage the tracks 21a and 21 b in order to facilitate the sliding of the balancing means 30 and of the panel 10 with respect to the frame 20.

The hatch 1 also includes a means 15 for locking the panel 10 with respect to the frame 20, respectively, in the two positions.

The hatch 1 also includes a grip means 16, in the specific case a handle, in order to facilitate the movement of the panel 10 in the transition between the closed position and the open position.

Finally, it is noted that according to a preferred installation method, the hatch 1 is mounted in an interspace provided in the circumferential wall 4 of the drum 2, to the full advantage of convenience and space occupation.

The operation of the hatch according to the present invention is as follows.

During the rotation of the drum 2, the panel 10 is retained in the closed position by the locking means 15.

For opening the panel 10, it is necessary to wait for the drum 2 to stop and then proceed with the release of the locking means 15.

At this point, by means of the grip means 16, it is possible to move the panel 10 from the closed position to the open position.

In this regard it is important to point out that the movement of the panel 10 occurs according to a circumferential sliding and is facilitated not only by the sliding of the wheels 14 and of the wheels 33 in the tracks 21 a and 21 b, but also and especially by the presence of the balancing means 30, which balances at least partially the weight of the panel 10.

The transition of the panel 10 from the open position to the closed position occurs substantially in the same manner but with a reversed motion.

In practice it has been found that the invention achieves the intended aim and objects, providing a hatch that is capable of opening and closing the loading/unloading opening of a rotating drum with a circumferential sliding motion, thereby considerably reducing the space occupation of the machine on which it is installed.

In fact, by virtue of its structure and of the motion system, the hatch according to the invention can be easily fitted in an interspace formed in the circumferential wall of the drum, thus remaining within the space occupation of the machine and without occupying additional surrounding space.

Furthermore, by virtue of the presence of a balancing system with counterweights, the hatch according to the invention is particularly easy to maneuver as well as reliable and safe in use.

The hatch for access to a rotating drum, particularly for machines for processing hides, fabrics, and the like, is susceptible of numerous modifications and variations, all of which are within the scope of the accompanying claims; all the details may also be replaced with other technically equivalent elements.

Of course, the materials used, so long as they are compatible with the specific use, as well as the contingent shapes and dimensions, may vary according to the requirements and the state of the art.

This application claims the priority of Italian Patent Application No. 102019000000609, filed on 15 January 2019, the subject matter of which is incorporated herein by reference.