JP2001269899A - Cutting method and cutting device for sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a post-process for peeling a vinyl sheet from a cut component texture is troublesome in a cutting device of the texture cutting the texture in a prescribed shape together with the vinyl sheet after the texture is spread on a suction workbench, the vinyl sheet is laid and sucked on it, and the texture is flatly held between the vinyl sheet and the suction workbench. SOLUTION: The texture W and the vinyl sheet S are sucked, held, and cut on the suction workbench 2 nearly as before, then the texture W is passed and conveyed below a peeling head 6 with its suction action area 30 faced downward. The texture W is left on the suction workbench 2, and the vinyl sheet S is sucked and wound up to the peeling head 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting a sheet material.

[0002]

2. Description of the Related Art When a thin sheet material such as cloth is cut (hereinafter, the sheet material to be cut is referred to as a "sheet material to be cut"), a cutting device used is a state in which a sheet material to be cut is spread. A work support having air permeability capable of supporting the work support, suction means for turning the support upper surface of the work support downward, and cutting the sheet material to be cut and sucked and held on the work support Some have a cutting head of a round blade type or the like that makes it possible, and a head moving unit that moves this cutting head in a plane along the support upper surface of the work support table.

In this cutting apparatus, first, a sheet material to be cut is spread on a work support table, and a non-breathable suction assisting sheet such as a vinyl sheet is entirely covered therefrom, and then suction is performed. Activate the means. As a result, the suction assisting sheet is completely and tightly attached to the work support table, and as a result, the sheet material to be cut is maintained in a flat state between the suction support sheet and the work support table by suction and held. Therefore, the cutting head is pressed against the work supporting table from above the suction assisting sheet and is moved in a plane in a predetermined direction, thereby cutting the sheet material to be cut together with the suction assisting sheet (to a predetermined shape). Cut out).

However, in this cutting apparatus, a considerable amount of running cost is required for the suction assisting sheet, and a post-treatment for stripping the cutting residue of the suction assisting sheet from the parts cut from the sheet material to be cut is required. In view of the circumstances, various devices have been developed to avoid using the suction assisting sheet for the purpose of solving these problems in terms of cost and work (see Japanese Patent No. 2966409). However, in the case where, for example, lace fabric having extremely high air permeability is applied as the sheet material to be cut, it has not yet been possible to completely eliminate the use of the suction assisting sheet, and the cutting apparatus of the above-described method has not yet been completed. The fact is that there is also a need.

[0005]

As described above, when a lace material is applied as a sheet material to be cut, if a conventional cutting device is used for the cutting, the suction assist sheet is cut from the cut parts. After-treatment for stripping off the cutting residue is required, but this operation is too troublesome and requires skill (knack). Therefore, even if the use of the suction assisting sheet cannot be made unnecessary, there has been a strong demand that at least the labor required for the post-processing be reduced as much as possible and preferably eliminated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is capable of eliminating the post-processing of stripping the cutting residue of the suction assisting sheet from a part cut from the sheet material to be cut. It is an object of the present invention to provide a sheet material cutting method and a sheet cutting device capable of achieving dramatic improvement in work efficiency and work efficiency.

[0007]

In order to achieve the above object, the present invention takes the following measures. That is, the method for cutting a sheet material according to the present invention is to spread and place the sheet material to be cut on a work support having air permeability, and cover the sheet material with a non-breathable suction assisting sheet. In this state, the support upper surface of the work support is drawn downward, and the sheet material to be cut and the suction assist sheet are sucked and held on the support upper surface of the work support. Up to the stage of cutting the sheet material to be cut together with the above, it is substantially the same as the conventional cutting apparatus.

[0008] In the sheet material cutting method according to the present invention, thereafter, suction is performed by the peeling head while the peeling head having the suction action area directed downward is kept in contact with the upper surface of the suction assisting sheet. The work support table and the peeling head are relatively moved along the support upper surface of the work support table in a region where the cut sheet material and the suction auxiliary sheet are cut. In this way, the sheet material to be cut and the cut-out parts thereof remain on the work support table by the action of being sucked downward from the work support table, whereas the suction assist sheet and the cutting residue thereof are As a result, it is wound up above the work support table by the action of being sucked into the peeling head.

Therefore, as a result, peeling of the suction assisting sheet and the cutting residue thereof from the sheet material to be cut and the cut-out part thereof is automatically started. It is not always necessary to make the action position for sucking the sheet material to be cut and its cut-out parts onto the work support table and the action position for sucking the suction assist sheet and its cutting residue to the peeling head in the vertical direction. On the other hand, the sheet material cutting apparatus according to the present invention includes a work support base, a suction unit, a cutting head, a cutting driving unit, a peeling head, and a relative moving unit.

[0010] The work support base has an area large enough to support the sheet material to be cut in a spread state, and has a gas permeability. The suction means is for bringing the upper support surface of the work support base downward and in a suction state. The cutting head is
The sheet material to be cut spread on the work support table can be cut. The cutting drive means moves the cutting head in a plane along the support upper surface of the work support.

The peeling head has a downwardly directed suction action area, and this suction action area can be brought into contact with a suction auxiliary sheet placed on a work support table via a sheet material to be cut. It was done in. The relative moving means makes at least one of them relatively movable along the upper support surface of the work support while the work support and the peeling head are brought close to each other. In the peeling head, the suction assisting sheet (including the cutting residue) peeled by the peeling head from the sheet material (including the cut-out parts) left on the work support table in the winding direction while being suctioned. It is preferable to provide a pull-up conveyor for carrying out.

Further, the work support table can be constituted as a transport conveyer in which a support upper surface for adsorbing and holding the sheet material to be cut and the suction auxiliary sheet can be circulated in one direction. In this case, the peeling head may be configured to be fixed to the downstream side in the transport direction of the work support table so as to cross the upper part thereof. In this case, it can be said that these configurations include the above-described relative movement means as an active component. Further, the peeling head is provided with a roller that is rotatable with its rotation axis parallel to the support upper surface of the work support table, and at least the downwardly facing outer peripheral surface of the roller enables external air suction. The above-mentioned suction action area may be provided.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration of an embodiment of a sheet material cutting apparatus 1 according to the present invention. In addition, a lace material is adopted as the sheet material W to be cut, and the sheet material W to be cut is supplied in a continuous band shape. A vinyl sheet is adopted as the suction assist sheet S, and the suction assist sheet S is also cut. The sheet supplied in the form of a continuous strip like the sheet material W is shown. The sheet material W to be cut and the suction assisting sheet S have substantially the same band width.

This sheet material cutting apparatus 1 includes a work support table 2
, Suction means 3, cutting head 4, cutting driving means 5
, A peeling head 6, a relative moving means 7, and a lifting conveyor 8. The work support base 2 has a support upper surface 2a having a sufficient width so as to support the sheet material W to be cut in a spread state, and the support upper surface 2a has air permeability. It has been assumed that. In the present embodiment, the work support base 2 is configured as a conveyor (band belt conveyor) using the endless belt belt 10. Therefore, the support upper surface 2a is constantly formed in a portion passing through the upper tension side when the belt belt 10 is circulated as a whole.

Although this transport conveyor is not shown,
The driving conveyor is configured to drive one of the erection rollers 11. The sheet material W to be cut and the suction assisting sheet S are fed into the work support table 2 from the upstream end side in the transport direction as the support upper surface 2a toward the downstream side. The suction means 3 is for bringing the support upper surface 2a of the work support table 2 into a suction state from the lower side, and is located inside the transport conveyor constituting the work support table 2 and on the upper side thereof (that is, the work support table 2). A suction box 13 having an upper portion as a suction port (not shown) is installed along the supporting upper surface 2a of the suction box 13a.
The inside can be sucked by a vacuum pump or the like (not shown).

The suction box 13 may be provided on the support upper surface 2a of the work support base 2 in a range over the entire length in the transport direction, or may be provided only in a partial area ( In the illustrated example, it is a half area on the upstream side including the intermediate position in the transport direction on the support upper surface 2a). For this reason, when the sheet material W to be cut and the suction auxiliary sheet S are sent toward the work support table 2, the sheet material W to be cut and the suction auxiliary sheet S are provided by the suction box 13 of the suction means 3. The vehicle travels in one direction together with the support upper surface 2a while being sucked and held on the support upper surface 2a in the range set.

The cutting head 4 spreads on the support upper surface 2a of the work support table 2 as described above, and enables the sheet material W to be cut and held by suction to be cut into a desired shape. In the illustrated example, a case is shown in which a cut-out part A having an oval shape is cut out from the sheet material W to be cut. The cutout parts A are arranged in a staggered arrangement along the longitudinal direction of the sheet material W to be cut. Naturally, by cutting out the cut-out part A having a round shape from the sheet material W to be cut in a staggered arrangement, the suction assist sheet S generates the cutting residue B in the same shape and the same arrangement. Will do.

As the cutting head 4, a method of rotating a round blade, a method of moving a cutter blade up and down at a high speed, a method of irradiating a laser beam, a heat ray, or the like, a material and thickness of a sheet material W to be cut, a cutting method, and the like. Various types may be employed depending on the pattern or the like. In this embodiment, as shown in FIG. 4, a method of rotating the round blade 15 is employed. This round blade 15
Is fixed to one end of a rotating shaft 17 rotatably held by a rotating shaft bracket 16.
7 is driven by a motor 18 that rotates the motor 7.

A pair of pressing rollers 20, 21 are separately and rotatably held on the rotating shaft 17 so as to sandwich both sides of the round blade 15, and these pressing rollers 20, 21 are mutually fixed. The motors are driven by separate motors 23 and 24, respectively. Each of these motors 23,
A servomotor 24 is used to control the rotation direction and rotation angle (amount) of each of the pressing rollers 20 and 21 as well as the rotation direction.

Therefore, the rotation speed of the round blade 15 when the circular blade 15 moves straight is adjusted with respect to each of the pressing rollers 20 and 21, and the difference between the inner and outer wheel speeds when the circular blade 15 progresses a curve is absorbed. The sheet material W to be cut
Further, both sides of the portion where the round blade 15 is cut with respect to the suction assisting sheet S are constantly stably pressed to prevent floating. The cutting driving means 5 is for moving the cutting head 4 in a plane along the support upper surface 2a of the work support table 2, and includes a turning drive unit 25 for performing a horizontal turning movement on the spot, and a vertical movement (contact / separation operation). Lifting drive unit 26 that performs
Width direction drive unit 2 for reciprocating in the width direction of support upper surface 2a
7 and the like.

Each of these drive units 25 to 27 employs or combines conventionally known mechanisms and instruments. For example, a stepping motor may be used in the turning drive unit 25, and the elevation drive unit 26 and the width direction drive The part 27 may be a combination of a screw feed mechanism, a hydraulic cylinder and a linear guide. In the present embodiment, since the work support table 2 is configured as a transport conveyor, the sheet drive W is inevitably provided with a transport drive to the sheet material W to be cut and the suction auxiliary sheet S. As 5, a driving unit that makes a movement perpendicular to the driving direction of the width direction driving unit 27 in the plane direction is not required. However, it goes without saying that such a drive unit may be provided.

As shown in FIGS. 2 and 3, the peeling head 6 has a suction action area 30 facing downward, and is capable of generating a suction action through the suction action area 30. When the sheet material W to be cut and the suction assisting sheet S are supplied to the support upper surface 2a of the work support table 2, the suction action area 30 with respect to the suction assisting sheet S on the upper side of the sheet material W Can be abutted. In the present embodiment, the peeling head 6 is a cylindrical roller 32 having a length equal to or greater than the widthwise dimension of the suction assisting sheet S and having a gas-permeable outer peripheral surface. Has a support shaft 33 for rotatably holding the roller 32 parallel to the support upper surface 2a of the work support base 2, and a motor 35 for rotating and driving the roller 32 via an appropriate transmission means 34 such as a friction transmission method. I have.

The peeling head 6 is fixed to the support upper surface 2a of the work support base 2 at a downstream portion in the transport direction and in a state of crossing the upper portion thereof (this fixing means that the peeling head 6 as a whole is This means that the roller 32 does not move, which is different from the rotation of the roller 32). The rotation direction of the roller 32 is determined by the support upper surface 2a of the work support table 2.
The direction (clockwise direction in FIG. 2) along this transport direction. In this roller 32, the air permeability of the outer peripheral surface is ensured by a large number of holes 36 provided randomly or orderly in the circumferential direction and the axial direction.

The material for forming the roller 32 can be a porous material. In this case, it is not necessary to provide the hole 36. On the other hand, the support shaft 33 is
A drum portion 40 which is in full surface contact with the inner peripheral surface of the roller 32 and is capable of backing up the roller 32;
And 1. The drum portion 40 and the hollow central shaft portion 41 are integrally connected to each other to form the support shaft 33 as a whole.

The hollow central shaft portion 41 has a suction hole 43 at the shaft end and a plurality of communication holes 44 on the outer peripheral surface. , Range that can be directed downward in the mounted state (angle range of about 60 ° from the position directly below to the downstream side in the transport direction)
In addition, a suction port 45 that opens greatly is provided.
A plurality of suction ports 45 may be provided at predetermined intervals in the axial direction.
May be formed continuously in the shape of a groove along the axial direction.

Although not shown, a vacuum pump or the like is connected to the suction hole 43 of the hollow central shaft portion 41. For this reason, in the peeling head 6, if the inside of the support shaft 33 is brought into a suction state by the operation of a vacuum pump or the like, the suction state extends from the communication hole 44 to the suction hole 45. Accordingly, the inner peripheral surface of the roller 32 is in a suction state in the area that matches the inside of the suction hole 45, and as a result, the area corresponding to the suction port 45 on the outer peripheral surface of the roller 32 (in this area) Holes 3 distributed in
6) is a region that effectively generates a suction action.

This area corresponds to the above-mentioned suction action area 30 as the peeling head 6. Therefore, the sheet material W to be cut (including the cut-out part A) is on the work support table 2 (before the peeling head 6 in the transport direction).
Similarly, it is held by suction, and therefore remains on the support upper surface 2a. On the other hand, the suction assisting sheet S (including the cutting residue B) is wound up above the work support 2 along with the rotation of the roller 32 while being sucked by the peeling head 6, and as a result, Sheet material W to be cut
, The suction assist sheet S is automatically peeled and removed.

With respect to the motor 35 for rotating the roller 32, the support upper surface 2a of the work support base 2 (transport conveyor) so that slip does not occur between the outer peripheral surface of the roller 32 and the contact surface of the suction auxiliary sheet S. Speed and roller 3
The peripheral speed of the roller 32 may be controlled to be synchronized with the peripheral speed of the roller 32, or slightly increased so that the suction auxiliary sheet S or the like does not wrinkle upstream of the peeling head 6 in the transport direction. It is preferable to control so that the The transmission means 32 is not limited to the friction transmission method, but may be a winding transmission method, a gear transmission method, a direct drive method, or the like.

The relative movement means 7 keeps the work supporting table 2 and the peeling head 6 close to each other such that the roller 32 of the peeling head 6 comes into contact with the suction assisting sheet S. The table 2 and the peeling head 6 are relatively movable (in a plane manner) along the support upper surface 2a of the work support table 2. However, in the present embodiment, since the work support base 2 is configured as a transport conveyor as described above, the sheet-to-be-cut sheet material W and the suction auxiliary sheet S are necessarily provided with a transport drive. Thus, relative movement with the peeling head 6 has already been obtained. That is, the work support base 2 itself also serves as the relative moving means 7 in an effective manner.

Needless to say, when the work supporting table 2 is not provided with a structure as a transport conveyor, at least one of the work supporting table 2 and the peeling head 6 is moved along the supporting upper surface 2a (in a planar manner). Therefore, the relative moving means 7 is configured independently. The lifting conveyor 8 is attached to the peeling head 6 at a position immediately downstream of the peeling head 6 in the transport direction. The lifting conveyor 8 is wound up by the peeling head 6 in a suction state and remains on the work support table 2. The suction assist sheet S that is being peeled off from the cut sheet material W is received as it is, brought into a suction state again, and can be further carried out in the winding direction.

As shown in FIG. 2, the structure of the lifting conveyor 8 includes a conveyor body 49 equipped with an endless belt belt 48 corresponding to the width of the suction assisting sheet S;
A suction box 50 in which a suction port (not shown) is brought into contact with the rear side of the upper side of the conveyor body 49 so that the belt belt 48 of the conveyor body 49 has air permeability. At the same time, the inside of the suction box 50 can be suctioned by a vacuum pump or the like (not shown). That is, the work support table 2 and the support upper surface 2
It can be said that in principle, the configuration is substantially the same as the configuration in which the suction box 13 provided for a is combined.

The conveyor body 49 is a drive conveyor, and its transport direction and transport speed are synchronized with the feed speed on the support upper surface 2a (transport conveyor) of the work support base 2. As shown in FIG. 1, in the sheet cutting apparatus 1 of the present embodiment, the sheet material W to be cut (including the cut-out part A) and the suction auxiliary sheet S (including the cutting slag B) are located downstream of the peeling head 6 in the transport direction. After being peeled off, the sheet material W to be cut remaining alone on the support upper surface 2a of the work support base 2
And a component extracting means 55 for extracting the extracted component A out of the system.

The component take-out means 55 is provided with a plurality of take-out heads 56 capable of adsorbing the individual cut-out parts A, for example. In this case, a three-dimensional transfer operation is performed by combining. Next, a sheet material cutting method according to the present invention will be described based on the operation state of the sheet material cutting device 1 described above. Work support 2
The sheet material W to be cut is supplied to the upstream end side of the support upper surface 2a in the transport direction, and the suction assist sheet S is supplied from above.

In this state, when the work support table 2 is driven as a conveyor and the suction means 3 is operated, the suction auxiliary sheet S is sucked on the suction box 13 to support the work support table 2. The sheet material W to be cut is suction-held between the upper and lower surfaces 2a while maintaining a flat state. Then, the cutting head 4 and the cutting driving means 5 are operated,
The sheet W to be cut and the suction assisting sheet S are cut into a predetermined shape (an oval shape in the illustrated example), a cutout part A is formed in the sheet W to be cut, and a cutting is performed in the suction assisting sheet S. The slag B is generated.

However, at this stage, the sheet material W to be cut (and the cut-out part A) and the suction auxiliary sheet S (and the cutting residue B) are still in close contact with each other. Assuming that the peeling head 6 and the lifting conveyor 8 are both operated, the cut target sheet material W and the suction assisting sheet S that have been subjected to the above-described cutting processing are transported to the fixing position of the peeling head 6. The suction assisting sheet S is taken up by the peeling head 6 in a state where the cutting scum B remains attached thereto, and is also taken up by the lifting conveyer 8 above the work support base 2.

Accordingly, as a result, the sheet material W to be cut and the cut-out part A thereof are supported on the support upper surface 2a of the work support table 2.
The suction auxiliary sheet S and the cutting residue B are separated and removed from the sheet material W and the cut-out part A thereof. After that, work support 2
In the above, the cut-out part A is taken out from the sheet material W to be cut out by the part take-out means 55, and the perforated waste material remaining thereafter is appropriately collected, and the suction assist sheet wound up above the work support base 2. S and its cutting residue B
This is also collected as appropriate so as not to be mixed with the perforated waste material of the sheet material W to be cut.

Incidentally, the present invention is not limited to the above-described embodiment, but can be appropriately changed according to the embodiment.

[0038]

As is apparent from the above description, in the sheet material cutting method and the sheet cutting device according to the present invention, the cutting residue of the suction assisting sheet is removed from the parts cut out from the sheet material to be cut. Since such post-processing is automated, the labor of manually performing this post-processing is eliminated, so that labor saving and dramatic improvement in work efficiency can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of a sheet material cutting device according to the present invention.

FIG. 2 is a side sectional view showing a part (peeling head) of FIG. 1 in an enlarged manner.

FIG. 3 is a cross-sectional perspective view showing a part (peeling head) of FIG. 1 in an enlarged manner.

FIG. 4 is an enlarged front sectional view showing a part (cutting head) of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet material cutting device 2 work support base 2 a support upper surface 3 suction means 4 cutting head 5 cutting drive means 6 peeling head 7 relative moving means 8 lifting conveyor 30 suction working area 32 roller 55 component takeout means A cutout part B cutting waste W Cutting sheet material S Adsorption auxiliary sheet

Claims (5)

[Claims] 1. A sheet material to be cut (W) is spread and placed on a work supporting table (2) having air permeability, and a non-breathable suction auxiliary sheet (S) is placed on the sheet material (W) to be cut. In this state, the support upper surface (2a) of the work support table (2) is made to be in a suction state downward, and the cut sheet material (W) and the suction auxiliary sheet (S) are placed on the support upper surface (2a). )
In this state, the sheet to be cut (W) is cut together with the suction assisting sheet (S) from above, and then the peeling head (6) with the suction action area (30) directed downward. ) Was suctioned by the peeling head (6) while keeping the upper surface of the suction assisting sheet (S) in contact with the sheet, and the sheet material (W) to be cut and the suction assisting sheet (S) were cut. By moving the work support (2) and the peeling head (6) relative to each other along the support upper surface (2a) of the work support (2) within the region, the sheet material to be cut (W)
And the cut-out part (A) is wound up by the peeling head (6) only with the suction auxiliary sheet (S) and its cutting residue (B) while leaving it on the work support (2), and the sheet material (W) to be cut and its A method for cutting a sheet material, which starts peeling from a cut-out part (A). 2. An air-permeable work support (2) for supporting the sheet material (W) to be cut in a spread state, and a support upper surface (2a) of the work support (2) downward. A suction means (3) for making a suction state toward the workpiece, a cutting head (4) for cutting the sheet material (W) spread and placed on the work support table (2), and a cutting head (4). 4) a cutting drive means (5) for moving a plane along the support upper surface (2a) of the work support (2), and a suction action area (30) provided downward to the work support (2). A peeling head (6) that can be brought into contact with the suction assisting sheet (S) placed thereon via the sheet material (W) to be cut, and the work support table (2) and the peeling head (6). ) And at least one of them is placed on the support upper surface (2a) of the work support base (2) while keeping them close to each other. And a relative moving means (7) for enabling relative movement along the sheet material. 3. A suction assist sheet (S) separated from the sheet material (W) left on the work support table (2) by the peeling head (6) is provided on the peeling head (6).
3. The sheet material cutting device according to claim 2, further comprising a lifting conveyor (8) that allows the sheet to be carried out in the winding direction while keeping the suction state. 4. The work support table (2) is a transport conveyor in which a support upper surface (2a) for adsorbing and holding a sheet material (W) to be cut and a suction auxiliary sheet (S) can be circulated in one direction. And the peeling head (6) is fixed to the work support table (2) at a downstream portion in the transport direction of the work support table (2) in a state of crossing the upper portion thereof. 4. The sheet material cutting device according to claim 2, wherein the relative movement means is included as a target. 5. The peeling head (6) includes a roller (32) that is rotatable with its axis of rotation parallel to a support upper surface (2a) of a work support (2). )
The cutting of a sheet material according to any one of claims 2 to 4, wherein the suction action area (30) that allows outside air suction is provided on at least a downwardly facing outer peripheral surface of the sheet material. apparatus.