EP0031286A1 - Apparatus for winding quadrangular wire-mesh - Google Patents

Abstract

This device comprises to support the wire roll, at least two V-shaped assemblies of each two strands (45, 46) of a member such as a chain (44), the plane of each of said assemblies being substantially perpendicular to the axis of the roller, said assemblies being spaced from each other by a distance substantially equal to a multiple of the diagonal of the mesh of the mesh considered, and each strand being capable of engaging in a chevron formed by the rows of folded stitches, and in that said strands are arranged to be driven with a longitudinal speed lower than the speed of supply of the mesh to the device.

Description

The present invention relates to a device for rolling up a single-twist mesh in which the rows of stitches are folded back on themselves around their center line of articulation, alternately in one direction and in the other so as to obtain a sort of folding accordion.

Such mesh rolls are known from French Patent No. 1,594,975. This patent describes a device allowing such a rolling of a single-twist wire mesh which is generally satisfactory.

A drawback of this device nevertheless lies in the fact that the installation for manufacturing the mesh must be stopped each time a completed roll must be removed from the device. This results in a loss of time detrimental to the performance of the installation.

The present invention aims to provide such a device which can be used downstream of a simple twist wire mesh installation, this installation not having to be stopped when a finished wire roll is removed from the device.

Another object of the invention is to provide a device making it possible to obtain more regular windings than the known device.

To this end, the subject of the present invention is a device for a roll-up of a single-twist mesh in which the rows of meshes are folded back on themselves around their median lines of articulation, a device to which the mesh is susceptible. to be brought to a predetermined speed, in the form of an extended ply, by the outlet drum of an installation for manufacturing such a mesh, characterized in that it comprises, to support the mesh roll, at least two sets in V shape of each two strands of an organ such as a chain, the plane of each of said assemblies being substantially perpendicular to the axis of the roller, said assemblies being spaced from each other by a distance substantially equal to a multiple of the diagonal of the mesh of the mesh considered, and each strand being capable of engaging in a chevron formed by the rows of folded stitches, and in that said strands are arranged to be driven with a longitudinal speed less than the speed for bringing the mesh to the device.

Preferably the ratio between the speed of said strands and said predetermined speed is of the order of 0.25.

Preferably also the branch of the V on which the grating is supplied makes with the horizontal an angle of the order of 40 °.

In addition, the two branches of the V preferably make an angle between them of the order of 40 °.

In a preferred embodiment of the invention, each of the V-shaped assemblies is formed of a member such as an endless chain wound on a plurality of wheels, one of which is disposed at each of the ends of the branches of the V.

It is of course possible to envisage V-shaped assemblies formed from a belt wound on pulleys, or even produced using ropes, wire cables wound in the form of a spring, etc.

Advantageously, a third wheel is provided between the first two wheels to cause the chain to take on substantially said V shape, the top of the V being formed by a fourth and a fifth pinch wheel disposed between the third wheel and each of the first two wheels respectively. .

The third wheel can be movable in the plane of the V in a direction substantially between those of the two branches of the V in order to compensate for the gradual increase in diameter of the wire roll as it is formed.

A sixth return wheel can also be provided in the plane of the V, in a direction opposite to that of the first two wheels relative to the third wheel.

The longitudinal speed of the strands of the chain is preferably obtained using one of the first two wheels which is provided for this purpose driving.

In an advantageous embodiment of the invention, at least one of the first two wheels is movable in the plane of the V and is capable of coming into a position where it is substantially at the top of the V, so that the corresponding branch of the V is substantially horizontal.

In this case, said movable wheel can be tiltable around the center of the fifth wheel which is adjacent to it inside the V.

The other of the first two wheels can then be fixed, an ejector roller being provided in the plane V to move with said movable wheel and deform the strand corresponding to said fixed wheel in the direction of said movable wheel. The ejector roller may preferably be a chain wheel in order to allow the device to continue to rotate while a finished wire roll is removed from the device.

In a preferred embodiment of the invention, support angles are provided in the plane of each of the - V-shaped assemblies between the output drum of the mesh manufacturing installation and the end of one of the branches of the V, these angles having an edge upwards.

This arrangement makes it possible to initiate, as soon as it leaves the installation for manufacturing the mesh, the folding down of each row of meshes on itself around its center line of articulation.

In this case said edge is advantageously substantially- in the extension of the strand corresponding to said branch of V.

Other characteristics and advantages of the invention will appear in the following description of one of its embodiments given by way of nonlimiting example.

• - La figure 1 est une vue en plan d'une portion de nappe de grillage à simple torsion,
• - La figure 2 est une vue de côté d'une pluralité de rangs de mailles après qu'il aient été rabattus sur eux-mêmes,
• - La figure 3 est une vue partielle d'un rouleau obtenu à l'aide du dispositif selon l'invention,
• - La figure 4 est une vue de côté d'un dispositif selon l'invention,
• - La figure 5 est une vue de face de ce dispositif,
• - La figure 6 est une vue de dessus de ce dispositif
• - La figure 7 est un schéma de principe réprésentant un élément du dispositif selon l'invention dans une première configuration,
• - La figure 8 est une vue similaire à la figure 4, représentant le même élément dans une seconde configuration et,
• - La figure 9 est une vue similaire aux figures 4 et 5 représentant le même élément dans une troisième configuration.

To the attached schematic drawings

• FIG. 1 is a plan view of a portion of a simple twist wire mesh,
• FIG. 2 is a side view of a plurality of rows of stitches after they have been folded back on themselves,
• FIG. 3 is a partial view of a roller obtained using the device according to the invention,
• FIG. 4 is a side view of a device according to the invention,
• FIG. 5 is a front view of this device,
• - Figure 6 is a top view of this device
• FIG. 7 is a block diagram showing an element of the device according to the invention in a first configuration,
• FIG. 8 is a view similar to FIG. 4, showing the same element in a second configuration and,
• - Figure 9 is a view similar to Figures 4 and 5 showing the same element in a third configuration.

The portion of the simple twist wire mesh shown in FIG. 1 is formed by a plurality of strands of metal wire 101, 102, 103 and 104. Each wire forms a broken line so that it is entwined with a on its sides with the wire which precedes it and on the other side with the wire which follows it.

FIG. 2 represents a mesh ply such as the ply 100 after the rows of stitches have been folded back on themselves around their median line of articulation. Thus the row formed by the son 101 and 102 is folded around the line 105 then the row of stitches formed by the threads 102 and 103 is folded around the line 106 in the opposite direction and the row of stitches formed by the wires 103 and 104 is folded around the line 107 in the same direction as the row formed by the wires 101 and 102.

If the structure of FIG. 2 is wound up on itself, a roll 50 is obtained, part of which is shown in FIG. 3. The external generators of this roll form, as shown in this figure, a succession of rafters with internal edges 51 and outer edges 52.

The device according to the invention shown in Figures 4 to 6 comprises a frame 1 disposed downstream of an installation for manufacturing a single-twist mesh, of which only the outlet drum 2 is shown in the drawings.

The output drum 2 rotates when this installation is in operation at a speed which is a function of the predetermined speed at which the mesh is produced and advances at the output of this installation. The mesh is therefore provided at this speed by the outlet drum 2 in the form of an extended ply. This ply is guided laterally by means of two cheeks 3 mounted on the outlet drum 2.

The frame 1 carries immediately downstream of the drum 2 a bar 4 and downstream of this bar 4 a second bar 5.

On the bars 4 and 5 are supported angles T-shaped whose wing 7 is mounted on suitable supports 8 and whose core 9 is directed upwards.

The angles 6 are distributed along the bars 4 and 5 between the cheeks 3 at approximately regular intervals. The distances which separate the different angles 6 from each other are substantially equal to a multiple of the diagonal of the mesh of the mesh which is to be rolled.

Furthermore, curved bars 14 are fixed to the upstream ends of the angles 9 and are partially wound around the drum 2.

The device also comprises a drive shaft 10 which carries a chain wheel 11 capable of cooperating via a chain 12 with another chain wheel 13 (FIG. 4) mounted on the shaft of the output drum 2. So when the drum 2 is driven by the drive means for installing the screen, this movement is transmitted to the shaft 10 with a given reduction ratio.

Another shaft 16 is mounted in the frame 1 and carries a chain wheel 17. This wheel 17 is provided to cooperate with a chain wheel 18 (FIG. 5) mounted on the shaft 10 at its end opposite to the wheel 11.

The wheel 18 therefore drives the wheel 17 and therefore the shaft 16 at a speed which depends on the ratio existing between the wheels 17 and 18. A tensioning pinion 20 whose axis is capable of sliding in slides 21 mounted on the frame 1 makes it possible to ensure the tension of the chain 19 for different ratios of the wheels 17 and 18. It is thus possible to adjust the ratio of the rotational speeds of the shaft 16 and of the output drum 2 of the installation for manufacturing the mesh .

In addition to the wheel 17 which is arranged outside the frame 1, the shaft 16 carries a plurality of chain wheels 24 which are arranged on this shaft so that each is located at the end of one of the angles 6.

On the shafts 22 and 23 are slidably mounted plates 39 which carry bearings on which are mounted chain wheels 25 concentric to the shaft 22 and chain wheels concentric to the shaft 23. The plates 39 are adjusted transversely such that the wheels 25 and 26 are arranged in pairs in the same planes as the wheels 24, that is to say in the vertical planes containing the angles 6.

Furthermore articulated arms 27 at the ends of which chain wheels 28 are mounted are rotatably mounted around bearings 31 concentric with the shaft 23 and consequently with the chain wheels 26, these bearings 31 being carried by the plates 39.

The arms 27 are secured to each other in rotation by a shaft 29 passing through the axes of the wheels 28.

Furthermore, levers .30 integral with the arms 27 are also capable of pivoting around the bearings 31 and carry at their ends chain wheels which are situated in the same planes as the wheels 28. The arms 27 and the levers 30 which are integral are arranged on the bearings 31 so that the wheels 28 and 32 are located in the same planes as the wheels 24, 25 and 26.

Another shaft 33 is carried by the frame 1 and supports chain wheels 34 each arranged in one of the planes defined by the wheels 24, 25, 26, 28 and 32.

Finally, a last shaft 35 is mounted on the frame 1.

The shaft 35 carries two cheeks 36 mounted on sliding bearings 37 and capable of being adjusted to lie in the same plane as the cheeks 3 of the output drum 2. The cheeks 36 can be fixed in position by means of members 38 provided on the bearings 37.

Furthermore, each plate 39 has a groove 40 (FIG. 4), in which the axis of a chain wheel 41 can slide. The axis of the wheel 41 is biased downwards, that is to say say on the side opposite to the wheels 24 and 28 relative to the wheels 25 and 26, by a spring 42, one end of which is mounted on the axis of the wheel 41 and the other end is integral with an extension 43 of the plate 39.

Finally chains 44 pass over each of the sets of wheels 24, 25, 26, 28, 33 and 41. Between the wheels 24 and 25 on the one hand and the wheels 26 and 28 on the other hand, the strands 45 and 46 respectively of the chain form a V as can be seen in figure 4.

In the embodiment shown in this figure, the strand 45 which is substantially in the extension of the upper edges of the angles makes with the horizontal an angle of substantially 40 ° and the strand 46 itself makes with the strand 45 an angle which is also substantially equal to 40 °.

Note also that the shaft 5 is mounted movable in rotation relative to the frame 1 and which can be actuated using a counterweight 47. Fingers 48 are integral with the axis 5 so that they pivot with the latter when the counterweight 47 is tilted.

Finally, it will be noted in FIG. 4 that the reels 60 make it possible to wind the wires at the same time as the wire mesh. These threads which facilitate the folding of the meshes and ensure their scheduling therefore make it possible to perfect the herringbone configuration of the roller. Furthermore, they make it possible to maintain the meshes during the rotation of the roller and facilitate the correct unwinding thereof, during its use.

The operation of the device described above is as follows.

Given the diameter of the output drum 2, the reduction ratio between the wheels 11 and 13, the reduction ratio between the wheels 18 and 17 and the diameter of the wheels 24, it is possible to determine the ratio between the speed of feeding of the mesh at the level of the drum 2 and the longitudinal speed of the chain 44.

Preferably for a mesh with a mesh width of 50 millimeters, this ratio can be equal to 0.25.

The counterweight 47 being in a position such that the fingers 48 are erased relative to the angles 6, the mesh is brought on these angles to the strand_45 of the chains 44. Before the winding begins, the device is in the configuration shown in FIG. 7 with strands 45 and 46 stretched and the axes of the wheels 41 at the bottom of the slides 40 where they are held by the traction of the springs 42.

The normal position for the arms 27 and the levers 30 is that shown in FIG. 7 in which the strands 45 and 46 form a V and in which the wheels 32 are separated from the arm 45.

It has been found that due to the slower advance of the chain 44 relative to the speed of feeding of the mesh, the latter tends to fold back so that each row of meshes is folded back on itself around of its center line of articulation and that it is wound up as shown in FIG. 8 in the form of a roll 50 whose generatrices form chevrons with internal edges 51 and external edges 52. The strands 45 and 46 of the chain 44 consequently supports the roller 50 by engaging inside the rafters thus formed.

As the diameter of the roller 50 increases the arms 45 and 46 of the chain 44 curve as shown in FIG. 5 so that the axes of the wheels 41 approach the wheels 25 and 26 inside the runners 40.

When the roll 50 is finished, the wire mesh is interrupted between the output drum 2 and the axis 5 and the fingers 48 are tilted in the position shown in FIG. 4. Consequently, the part of the ply situated downstream of the interruption completes the roller 50 while the part situated upstream is blocked by fingers 48, so that the mesh can continue to be fed by the output drum 2 during the maneuver described below during which the roller 50 is removed from the device.

The set of arms 27 is tilted downwards in the position shown in FIG. 9, driving with it the shaft 29 and the chain wheels 28. In this movement, the levers 30 are also tilted and they drive the wheels 32 .

Thus the strand 46 of the chain 44 becomes substantially horizontal while the wheel 32 deforms the strand 45 which thus causes the roller 50 to tip over onto the horizontal strands 46 from which it can be removed.

The arms 27 are then returned to the position they occupy in FIGS. 4 and 7. The fingers 48 are again retracted so that a new grid of mesh comes to take place between the strands 45 and 46 where it begins to s' wrap as described with reference to figure 7.

The invention therefore provides a device for putting a single-twist mesh in a compact roll, without it being necessary to stop the installation for manufacturing this mesh during the handling of the finished rolls. It has also been found that it is thus possible to obtain a very high regularity of winding.

Claims (15)

1. Device for rewinding a single-twist mesh in which the rows of meshes are folded back on themselves around their median lines of articulation, device to which the mesh is capable of being brought at a predetermined speed, under form of an extended ply, by the outlet drum of an installation for manufacturing such a mesh, characterized in that it comprises to support the mesh roll, at least two V-shaped assemblies of each two strands of a member such as a chain, the plane of each of said assemblies being substantially perpendicular to the axis of the roller, said assemblies being spaced from each other by a distance substantially equal to a multiple of the diagonal of the mesh of the considered mesh, and each strand being capable of engaging in a chevron formed by the rows of folded stitches, and in that said strands are arranged to be driven by a longitudinal speed less than the quick sse of bringing the mesh to the device. 2. Device according to claim 1, characterized in that the ratio between the speed of said strands and said predetermined speed is of the order of 0.25. 3. Device according to any one of claims 1 and 2, characterized in that the branch of the V-on which the grid is supplied made with the horizontal an angle of about 40 °. 4. Device according to any one of claims 1 to 3, characterized in that the two branches of the V form an angle between them of the order of 40 °. 5. Device according to any one of claims 1 to 4, characterized in that each of the V-shaped assemblies is formed of a member such as an endless chain wound on a plurality of wheels, one of which is arranged at each of the ends of the branches of the V. 6. Device according to claim 5, characterized in that a third wheel is provided between the first two wheels to cause the chain to take substantially said V shape, the top of the V being formed by a fourth and a fifth wheels of toe-in disposed between the third wheel and each of the first two wheels, respectively. 7. Device according to claim 6, characterized in that the third wheel is movable in the plane of the V in a direction substantially between that of the two branches of the V. 8. Device according to any one of claims 6 and 7, characterized in that a sixth return wheel is provided in the plane of the V, in a direction opposite to that of the first two wheels relative to the third wheel. 9. Device according to any one of claims 5 to 8, characterized in that one of the first two wheels is driven. 10. Device according to any one of renditions 5 to 9, characterized in that at least one of the first two wheels is movable in the plane of the V and is capable of coming into a position where it is substantially at the level of the top of the V, so that the corresponding branch of the V is substantially horizontal. 11. Device according to any one of claims 6 and 10, characterized in that said movable wheel is tiltable around the center of the wheel which is adjacent to it inside the V. 12. Device according to any one of claims 10 and 11, characterized in that the other of the first two wheels is fixed and that an ejector roller is provided in the plane of the V to move with said movable wheel and to deform the strand corresponding to said fixed wheel in the direction of said movable wheel. 13. Device according to claim 12, characterized in that the ejector roller is a chain wheel. 14. Device according to any one of claims 1 to 13, characterized in that the support angles are provided in the plane of each of the V-shaped assemblies between the outlet drum of the installation for manufacturing the mesh and the end of one of the branches of the V, these angles having an edge upwards. 15. Device according to claim 14, characterized in that said edge is substantially in the extension of the strand corresponding to said branch of the V.

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