JPH10168743A - Cutting apparatus for sheet shaped body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the quick response on the size of a bottom cloth while the cost of the subject apparatus is suppressed. SOLUTION: This apparatus is composed of a raw fabric-drawing mechanism 2 for drawing out a raw fabric R by a specified length every time, a raw fabric- placing table 3 for placing the raw fabric R having a specific size drawn out by the raw fabric-drawing mechanism 2, an offset-preventing mechanism 4 for preventing the offset of the raw fabric R placed on the raw fabric-placing table 3, a cutting mechanism 5 for cutting out the raw fabric R, in the state where the offset is being prevented by the offset-preventing mechanism 4, into a circular shape to obtain a circular sheet body R2 and the remaining sheet body R3, and a circular sheet body-discharging mechanism 6 and a remaining sheet body-discharging mechanism 7 which discharge, from the raw fabric- placing table 3 in a state where the offset-preventing mechanism 4 is released, the circular sheet body R2 and the remaining sheet body R3, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting apparatus for cutting a sheet into a circular shape for a bottom and a ceiling of a cylindrical bag such as a flexible container bag.

[0002]

2. Description of the Related Art Conventionally, a flexible container bag (hereinafter referred to as a flexible container bag) is manufactured by sewing a sheet made of a woven product using fibers made of synthetic resin into a cylindrical shape. Is formed by cutting a sheet body into a circular bottom cloth having a diameter dimension equal to the diameter dimension of the sheet, and sewing the peripheral edge of the bottom cloth and the lower edge of the cylindrical body. A cross cut is formed in the center of the bottom cloth in advance. A tubular body sewn around the cut is provided, and the tubular body is tied with a string to prevent leakage of the stored object, and the stored object is released to the outside by releasing the binding. It is being discharged.

[0003] In some cases, a ceiling cloth having the same shape and a cross cut as that of the bottom cloth is made. The ceiling cloth is sewn at the peripheral edge thereof to the upper edge of the cylindrical body. Is closed by a ceiling cloth.

[0004] Such a flexible container bag is easy and inexpensive to manufacture, has a small bulk when folded, and is convenient for storage and transport, and can easily perform the operation of discharging the contents. In particular, they are used for transferring granular materials such as grains and activated carbon, and powdered materials such as grain powder and cement.

[0005]

By the way, conventionally, in manufacturing a flexible container bag, the above-mentioned bottom cloth and ceiling cloth are formed by pressing a sheet member drawn from a raw material with a press die having a circular press blade. Although the press machine was manufactured by press processing, such a press machine for press processing is formed with a press die having a diameter of about 1 m and a drive mechanism for driving the press die. In addition, there is a problem that it is very expensive.

Further, in order to cope with bottom cloths having different diameters, a plurality of expensive press dies must be prepared in advance, which is economically disadvantageous. However, the operation of replacing the press mold is troublesome, which also has a problem that the production efficiency is deteriorated.

In order to solve such a problem, a large number of sheets laminated to a predetermined thickness are cut into a circular shape with a saw blade to form a bottom cloth or a ceiling cloth, and thereafter the bottom cloth or a ceiling cloth is formed with a saw blade. Cross cutting is sometimes performed on cloth and ceiling cloth, but using a saw blade causes a new problem that sawdust adheres to the bottom cloth etc., and the inside of the flexible container, which is the final product, is contaminated with the above sawdust. You. If the inside of the FIBC bag is contaminated with sawdust, the contents loaded therein will be contaminated with the sawdust, so that contamination of the FIBC bag must be avoided.

The present invention has been made to solve the above-mentioned problems, and has a low equipment cost.
Further, it is an object of the present invention to provide a sheet cutting apparatus which can quickly respond to various sizes of a bottom cloth and a ceiling cloth, and can surely prevent contamination of a flexible container as a final product. The purpose is.

[0009]

According to a first aspect of the present invention, there is provided a sheet cutting apparatus for cutting a sheet into a circular shape, wherein the sheet is pulled out by a predetermined dimension. A mechanism, a source mounting table on which the source having a predetermined dimension pulled out by the source pulling mechanism is mounted, and a position deviation preventing mechanism for preventing a position shift of the source placed on the source mounting table. A cutting mechanism that cuts the raw material in a state in which the positional deviation is prevented by the positional deviation preventing mechanism into a circular sheet body and a residual sheet body, and a state in which the positional deviation prevention by the positional deviation preventing mechanism is released. A circular sheet discharging mechanism and a residual sheet discharging mechanism for discharging each of the circular sheet and the residual sheet separately from the sheet mounting table. A rotating mechanism that is supported by the support frame body above the web mounting table and that rotates about a vertical axis; a driving unit that rotates the rotary arm; and a distance from the vertical axis to the rotary arm. Are provided so as to be adjustable, and have a cutting blade for cutting the raw material on the raw material mounting table by rotation of the rotary arm.

According to the sheet cutting apparatus, the web pulled out by a predetermined size by the web pulling mechanism is spread on the web mounting table every time the web is pulled out, and the positional deviation is prevented by the positional deviation prevention mechanism. In this state, the cutting process is performed to form a circular sheet and a residual sheet by performing a circular cutting process by driving the cutting mechanism, and the circular sheet is sequentially discharged from the source mounting table by the circular sheet discharging mechanism. At the same time, the residual sheet body is also discharged by the residual sheet body discharging mechanism. By driving the above mechanisms in cooperation with each other, the raw material wound on the roll is automatically pulled out and subjected to a cutting process, and circular sheet bodies are obtained one after another.

[0011] Then, in a state where the web is placed on the web mounting table with the position thereof being prevented from being shifted, the rotating arm is rotated about a vertical axis by driving of the driving means, so that the web is attached to the rotating arm. The cutting blade travels in a circular shape on the sheet body, whereby the sheet body is cut out in a circular shape. Since the distance between the vertical axis and the cutting blade is adjustable, by changing this distance, it is possible to immediately cope with circular sheets of various sizes.

As described above, according to the present invention, a circular sheet body is not obtained by punching a raw material by a pressing process by the vertical movement of a cylindrical heavy press die as in the prior art. It is possible to reduce the weight of the apparatus, and the equipment cost is correspondingly reduced. In addition, in the past, multiple sizes of press dies had to be prepared and placed in advance, assuming that the size of the circular sheet body changed, which increased the cost and made it extremely troublesome to replace the press dies. However, the present invention can easily and quickly respond to any size of the circular sheet body by adjusting the cutting radius, and has excellent operability. I have.

Further, instead of performing the processing of laminating sheets and cutting them with a saw blade, which has been conventionally performed, one sheet is used.
Since each sheet is cut by a cutting blade, there is no inconvenience that the final product is contaminated with sawdust as in the related art.

According to a second aspect of the present invention, there is provided a sheet cutting apparatus according to the first aspect, wherein the misalignment preventing mechanism includes a front and back position of the sheet on the sheet mounting table. A plurality of through holes penetrated in the
And a suction means for sucking the sheet member placed on the source sheet mounting table through these through holes and bringing it into close contact with the source sheet mounting table.

According to the sheet cutting apparatus, the suction means is driven in a state where the sheet is spread on the sheet mounting table, so that the air in the space below the plurality of through holes is sucked. Since the pressure of this portion is lower than that of the outside air, the sheet member is sucked to the surface of the raw sheet mounting table, so that a position shift is prevented.

As described above, by using the suction means, the sheet body on the source mounting table is securely fixed on the source mounting table over a wide range, and thereby, the cutting mechanism of the sheet cutting mechanism is provided. Cutting processing by circular motion is performed reliably.

According to a third aspect of the present invention, there is provided a sheet cutting apparatus according to the first or second aspect, wherein the rotating arm moves by the same diameter through a center of rotation. It is characterized by having a cutting blade.

According to this sheet cutting apparatus, the second cutting blade is reciprocated on the rotating arm in a state where the rotating arm is stopped, so that a straight line passing through the center of the center portion of the circular sheet body. It becomes possible to make a break. Therefore, a cross cut is provided at the center of the circular sheet body by moving the cutting blade by moving the rotary arm by 90 ° after one cut is obtained.

A sheet cutting apparatus according to a fourth aspect of the present invention is the sheet cutting apparatus according to any one of the first to third aspects, wherein the rotation of the rotary arm causes the sheet on the sheet mounting table to rotate. It has a marking means for drawing a circle, and the marking means is characterized in that the distance from the vertical axis is adjustable.

According to the sheet body cutting apparatus, the rotating arm is rotated to draw a circle on the surface of the circular sheet body by the marking means, so that the circle can be used as a lead line at the time of sewing.

A sheet cutting apparatus according to a fifth aspect of the present invention is the sheet cutting apparatus according to any one of the first to fourth aspects, wherein:
Control means for controlling the position shift prevention mechanism, the sheet cutting mechanism, the circular sheet discharging mechanism, and the residual sheet discharging mechanism to operate in cooperation with each other is provided. is there.

According to the sheet cutting apparatus, the original sheet pull-out mechanism, the displacement prevention mechanism, the sheet cutting mechanism, the circular sheet discharging mechanism, and the residual sheet discharging mechanism are controlled by the control means. The cutting operation is sequentially performed on the sheet bodies, and the circular sheet bodies are automatically obtained one after another and are discharged.

[0023]

1 and 2 are perspective views showing an embodiment of a cutting apparatus according to the present invention. FIG. 1 shows a state before a sheet body is cut, and FIG.
Shows a state where the cut sheet body is grasped and pulled out. 1 and 2
, The XX direction is referred to as the width direction, the YY direction is referred to as the front-rear direction, and in particular, the −X direction is referred to as left, the + X direction is referred to as right, the −Y direction is referred to as front, and the + Y direction is referred to as rear.

As shown in FIGS. 1 and 2, the cutting device 1 comprises a frame 10 installed on a floor F,
An original sheet pull-out mechanism 2 provided at the front of the frame 10 and for extracting the sheet R1 from the original sheet R wound on a roll, and an original sheet mounting table 3 provided at the upper center of the frame 10 A displacement prevention mechanism 4 for preventing a displacement of the material R pulled out to the material placing table 3;
A cutting mechanism 5 that cuts out the raw material R placed thereon into a circular shape and turns the raw material R into a circular sheet body R2 (FIG. 2) and a residual sheet body R3 after being cut out, and the sheet body R1 is mounted on the original sheet A sheet discharge mechanism for discharging the sheet R from the table 3 (a circular sheet discharge mechanism 6 for discharging the circular sheet R2 from the source table 3 and a residual sheet for discharging the residual sheet R3 from the table 3). And a body discharge mechanism 7).

The frame 10 includes a base frame 11 formed by combining metal angle members in a rectangular parallelepiped shape, and a cutting frame that is mounted on the upper center of the base frame 11 and supports a cutting mechanism. It consists of 12. The base frame 115 has a total of six support leg members 13 whose height can be adjusted on the lower surface of the four corners and the lower surface of the substantially central portion of the pair of angle members at the lower part in the width direction. The horizontal posture of the frame 10 on the floor F is maintained by adjusting the height of the frame 10.

FIG. 3 is a side view showing the raw material pulling-out mechanism 2 of the cutting device 1. As shown in FIG. 3, the web pull-out mechanism 2 includes a pair of width-wise brackets 21 protruding outward from a front support 14 of the base frame 11, and a width provided on an upper portion of the bracket 21. A pair of bearings 22 in the direction;
The bearing 22 includes a roll support shaft 23 rotatably and detachably supported around an axis thereof, and a raw material drawing means 24 supported by the base frame 11 behind the roll support shaft 23. It is formed.

An original fabric R formed by winding a woven product made of a synthetic resin is externally fitted to the roll support shaft 23. The sheet material R1 is pulled out from the material roll R, guided to the material loading table 3 via the material roll pulling means 24, and driven by the material pulling means 24 in conjunction with the residual sheet discharging mechanism 7. The R is rewound and moves on the substrate mounting table 3 by a predetermined length.

The material drawing means 24 includes a first roller 25 provided above the foremost part of the upper angle member 15 of the base frame 11, an air cylinder 26 provided behind the first roller 25, A swing arm 271 that swings when the piston rod 261 of the air cylinder 26 moves in and out.
And a second roller 27 provided at the tip of the swing arm 271, and a roller group 28 provided behind the air cylinder 26.

The first roller 25 is used for the upper angle material 1
5, between a pair of first brackets 25a in the width direction, which are rotatably supported around a horizontal axis 25b. Also,
The upper end of the air cylinder 26 is pivotally supported by a pair of second brackets 26a erected on the upper angle member 15 behind the first bracket 25a so as to be swingable about a horizontal axis 26b.

The swing arm 271 has a front end side pivotally supported around a horizontal shaft 27a provided on the bracket 21 and has a substantially central portion at the distal end of the piston rod 261 at a horizontal shaft 27c. It is swingably connected around. The second roller 27 is rotatably supported around a horizontal shaft 27b bridged between the piston rods 261. And the swing arm 271
Is a piston rod 26 driven by an air cylinder 26.
The position of the second roller 27 can be changed between a lowered position shown by a solid line in FIG. 2 and a raised position shown by the two-dot chain line in FIG.

The roller group 28 includes the upper angle member 15
Upper second bracket 26a and cutting frame 1
Four third rollers 2 rotatably bridged around an axis between a pair of widthwise third brackets 28b erected between the two third rollers 2
8a. These third rollers 28a
Are paired two at a time.
The third bracket 28b is provided with a pair of operation rods 28c corresponding to the pair of upper and lower third rollers 28a, and the operation of the operation rods 28c allows the corresponding pair of upper and lower third rollers 28a to be separated from and brought into contact with each other. It has become.

In the material pulling mechanism 2, the material R, which is supported by the roll support shaft 23, has its end pulled out and is hung above the first roller 25 and below the second roller 27. The roller is then wound around the pair of upper and lower third rollers 28a of the roller group 28 in an S-shape, guided to the sheet mounting table 3, and further mounted on the residual sheet discharging mechanism 7. Then, the swinging arm 2 which is in the forwardly lowered posture
The sheet body R1 indicated by a solid line in FIG. 2 in a state of being pushed down to the lower part of the upper angle member 15 by 71 is hung down by the immersion of the piston rod 261 driven by the air cylinder 26, and in this state. As a result, the residual sheet discharging mechanism 7 is moved backward by a predetermined pitch due to the intermittent driving, whereby it is stretched on the second roller 27 of the swing arm 271 in the state shown by the two-dot chain line in FIG. It will be in the state that was done. In this state, the raw sheet mounting table 3
The cutting process is performed on the sheet body R1 that has moved upward.

Next, the swinging arm 271 in the rising position shown by the two-dot chain line in FIG. 2 is returned to the falling position by driving the air cylinder 26, so that the sheet member R1 stretched on the second roller 27 is 2, as shown by the solid line in FIG. In this way, the web pulling-out mechanism 2 plays a role of intermittently supplying the sheet R1 from the web R to the web loading table 3 at a predetermined pitch by interlocking with the residual sheet discharging mechanism 7. is there.

FIG. 4 is a plan view showing an embodiment of the material placing table 3, and FIG. 5 is a sectional view of the same. FIG. 5 also shows the displacement prevention mechanism 4. As shown in these figures, the material placing table 3 has a frame base 31 having a mounting hole 32 having a circular central portion, and a mounting hole 32 of the frame base 31.
And a raw material mounting disk 33 attached to the disk. The inner diameter of the upper edge of the mounting hole 32 is
The diameter of the annular step portion 31 is slightly larger than the diameter of the mounting hole 32 and slightly below the upper edge of the mounting hole 32.
a is formed, and the stepped portion 31a prevents the source mounting disk 33 fitted in the mounting hole 32 from falling off, so that the source mounting disk 33 is mounted in the mounting hole 32. .

The original loading disk 33 is set to have a diameter slightly smaller than the width of the sheet member R 1, so that the sheet member R 1 is spread and placed on the original table 3. The entire surface is covered. Further, the raw material mounting disk 33 has a large number of air holes 34 penetrating vertically, and when the back surface side of the raw material mounting disk 33 is depressurized by the air holes 34, the sheet body R1 The mounting disk 33 is closely fixed to the surface of the mounting disk 33.

As shown in FIG. 5, the displacement prevention mechanism 4 is fixed to the lower surface of the frame base 31 so that
And a fan 42 attached to the cylindrical hood 41 via a support rod 43. The fan 42 is disposed such that the axis of the drive shaft coincides with the center line of the web-mounting disk 33, and the pressure in the cylindrical hood portion 41 becomes substantially uniform and low when the fan 42 is driven. Like that. And
By driving the fan 42 in a state where the sheet R1 is supplied on the web 33, the sheet R1 is sucked downward through the air holes 34, and thereby the sheet R on the web 33 is placed. The deployment state of R1 is stabilized.

FIG. 6 is a partially cutaway perspective view showing an embodiment of the cutting mechanism 5, and FIG. 7 is a side view thereof. As shown in these figures, the cutting mechanism 5
A drive mechanism 50 on the support plate 16 that is spread across the cutting frame 12 in the width direction, and a rotating plate 54 that is rotated by the drive mechanism 50 about the center of the source material mounting disk 33.
And a cutter structure 55 attached to the rotating plate 54.
And

The drive mechanism 50 includes a drive motor 51 erected above a support member 17 fixed on the support plate 16 and having an inverted U-shape in side view, and a driving force of the drive motor 51. The transmission 52 is provided between the support member 17 and the support plate 16. The drive shaft 53 is positioned so that its axis coincides with the center of the web 33, the upper portion is supported by the support member 17 so as to be rotatable around its own axis, and the lower portion is It extends downward through the support plate 16, and its lower end is fixed to the center of the rotating plate 54. As a result, the rotating plate 54 rotates coaxially with the rotation of the drive shaft 53 around its own axis via the transmission 52 driven by the drive motor 51.

The rotating plate 54 has four pillars 54a erected at the center so as to form a rectangle in plan view, and a relay plate 54b supported by these pillars 54a. The lower end of the drive shaft 53 is fixed to the relay plate 54b. Thereby, the relay plate 54b and the rotating plate 54
And a space is formed between them, and this space is
Can pass through.

A first guide slot 54c extending in the longitudinal direction is formed in one side of the rotating plate 54, and a second guide slot 5 extending in the longitudinal direction is formed in the other side.
4d is drilled. These guide slots 54c, 5
4 d is for guiding the cutter structure 55 on the rotating plate 54.

A pair of brackets 54e facing each other are provided on the rear surface of the rotary plate 54 at the center and the end on the second guide slot 54d side, and extend in a horizontal direction parallel to each other between the brackets 54e. A pair of guide rods 5
4f is provided. These guide rods 54f are also for guiding a part of the cutter structure 55 on the rotating plate 54.

The cutter structure 55 includes a circular cutting means 56 for cutting the sheet R1 into a circular shape,
Cross cutting means 57 for cutting the central portion of the circular sheet body R2 in a cross shape. The circular cutting means 56 includes a first pedestal 56a that can move horizontally while being guided by the first guide slot 54c, a first cylinder 56b erected on the first pedestal 56a, and a first cylinder 56b. A guide rod 56c provided adjacent to the first pedestal 56a.

The piston rod 561b of the first cylinder 56b extends downward through the first pedestal 56a, and the guide rod 56c is also connected to the first pedestal 56a.
Extend downward through the piston rods 561b
And the lower end of the guide rod 56c is the cutter support piece 5.
6d. Further, a guide cylinder 561c into which the guide rod 56c is inserted in a slidable state is fixed to the first pedestal 56a.
6c can be reliably moved up and down without sideways movement. Therefore, the piston rod 561b is made to protrude and retract by driving the first cylinder 56b, so that the cutter support piece 5
In 6d, the guide rod 56c moves up and down while being guided by the guide cylinder 561c.

The first pedestal 56a is provided with a fastening means 56f provided with an operating rod.
The movement of the first pedestal 56a can be prevented by the fastening operation of the fastening means 56f.
The pedestal 56a can be moved.

A first cutting blade 56e is detachably mounted on the cutter supporting piece 56d of such a circular cutting means 56. This first cutting blade 5
6e is set so that the cutting edge extends in the circumferential direction of the center of rotation of the rotary plate 54, whereby the first cylinder 56b
When the cutter support piece 56 d is lowered via the piston rod 561 b by the driving of the blade, the blade edge is brought into contact with the sheet member R 1 (FIG. 1) on the raw sheet placing disk 33, and the rotating plate 54 is driven by the drive shaft 53.
By rotating the sheet body around, the sheet body R1 is cut into a circular shape.

The cutter supporting piece 56d has an energizing heating element made of a not-shown nichrome wire or the like inside, and the first cutting blade 56e has a higher temperature than the melting temperature of the sheet member R1 due to the heat generated by the energizing heating element. The ends of the fibers of the cut sheet body R1 are welded to each other to prevent fraying of the fiber in the cut portion, and also caused by cutting debris due to fraying of the fiber. The contamination of the circular sheet body R2 is prevented.

The cruciform cutting means 57 includes the second guide elongated hole 54 d and the pair of guide rods 54.
f, a second cylinder 57b erected on the second pedestal 57a, and a third cylinder 5 for moving the second pedestal 57a forward and reverse in the radial direction.
8 is provided. The piston rod 571b of the second cylinder 57b penetrates the second pedestal 57a in a slidable state and hangs downward.

The second pedestal 57a is provided with a guide rod 57c vertically adjacent to the second cylinder 57b in a sliding contact state. This guide rod 57c
Is a guide cylinder 571c standing and fixed to the second pedestal 57a.
, So that it is possible to ascend and descend in a state in which lateral vibration is prevented. The piston rod 571
A cutter support piece 57d is fixed to the lower end of the guide rod 57c and b, and a second cutting blade 57e is detachably attached to the cutter support piece 57d. The second cutting blade 57e has a cutting edge provided in parallel with the moving direction of the second pedestal 57a.

Accordingly, by moving the piston rod 571b up and down by driving the second cylinder 57b, the cutter support piece 57d is moved up and down, whereby the second cutting blade is attached to the sheet member R1 placed on the original loading disk 33. 57e
Can be separated from each other.

On the other hand, the second pedestal 57a has a narrow portion 571a fitted into the second guide elongated hole 54d, and a wide portion 572a wider than the narrow portion 571a extending below the narrow portion 571a. A bracket 573a protruding from the narrow portion 571a in one width direction (to the left in FIG. 6).
And The wide plate 572a has a rotating plate 54
A pair of guide holes 574a extending in the width direction extending in the longitudinal direction is provided. The guide rods 54f are fitted into these guide holes 574a in a sliding contact state, whereby the second pedestal 57a is movable while being guided by the guide rods 54f.

The third cylinder 58 is fixed on the rotary plate 54 adjacent to the first guide slot 54c and parallel to the slot 54c. The distal end of the piston rod 58a of the third cylinder 58 is fixed to the bracket 573a of the second pedestal 57a.
a is the second guide slot 54 when the piston rod 58a protrudes and retracts.
It moves forward and backward while being guided by d and the guide rod 54f.

Accordingly, in a state where the sheet body R1 is supplied onto the web 33 (FIG. 1) and the rotation of the rotary plate 54 is stopped, the piston rod 571b and the cutter are driven by driving the second cylinder 57b. The second cutting blade 57e is lowered via the support piece 57d to bring the blade into contact with the sheet member R1, and then the piston rod 58a is caused to protrude and retract by driving the third cylinder 58.
1 is cut by the second cutting blade 57e, and a linear cut is formed in the sheet body R1. By repeating the above operation while changing the phase of the rotating plate 54 every 90 °, a cross cut is formed in the sheet body R1.

Such a cross cutting means 57 includes:
The rotation plate 54 has a stopper 57f provided on a bracket 54e on the second pedestal 57a side. This stopper 5
7f is formed with a screw shaft 571f extending in the longitudinal direction of the rotating plate 54 screwed to the bracket 54e, and a circular handle 572f attached to an outer end of the screw shaft 571f.

The position of the stopper 57f is set such that the inner end of the screw shaft 571f is at the same height as the wide portion 572a of the second pedestal 57a. The second moving towards
The pedestal 57a has a wide portion 572a having a screw shaft 571f.
And further movement is prevented. The movement preventing position is set at the circular handle 572f.
It can be adjusted by changing the screwing amount of the screw shaft 571f by operation.

The rotating plate 54 includes a sheet member R1.
Marking means 59 which draws a circle on the surface of is provided. The marking means 59 is provided in the first guide slot 54c.
The third pedestal 59a and the fourth pedestal 59b, which are configured to be movable by being guided by the third pedestal, and the fourth pedestal erected on the third pedestal 59a.
Cylinder 59c, third pedestal 59a and fourth pedestal 59
b, a pair of guide rods 5 each penetrating in a sliding state.
9d, 59e, a connecting plate 59f for connecting the piston rod 591c of the fourth cylinder 59c and both guide rods 59d, 59e, a first pen holding portion 59g formed on the connecting plate 59f, and a fourth pedestal 59b side. Pen holder 59h fixed to the lower end of guide rod 59e
Are formed.

The third pedestal 59a is provided on the rotating plate 54 outside the fourth pedestal 59b from the center side and inside the first pedestal 56a. The lower end of the piston rod 591c of the fourth cylinder 59c and the lower end of the guide rod 59d are fixed to the connecting plate 59f, respectively.
A third guide long hole 591f extending in the radial direction is formed in the connecting plate 59f inside 1c, and the vertical movement of the second pen holding portion 59h is regulated while being guided by the third guide long hole 591f. It is fitted so as to be able to move in the horizontal direction in a state where it has been moved.

Therefore, the fourth seat 59b can move horizontally independently of the third seat 59a while being guided by both the first guide slot 54c and the third guide slot 591f, and can drive the fourth cylinder 59c. Piston rod 5 by
The first pen holding unit 59g and the second pen holding unit 59h are simultaneously moved up and down by the up and down movement of 91c.

The pedestals 59a and 59b are provided with fastening means 59i and 59j having operating rods, respectively, and the movement of the pedestals 59a and 59b is prevented by the fastening operation of these fastening means 59i and 59j. Gain and
Each pedestal 59a, 59b can be moved by an operation of releasing the fastening means 59i, 59j.

The first pen holding portion 59g and the second pen holding portion 59h are configured so that a marking pen P having a pen tip directed downward can be detachably mounted. Therefore, after the positions of the pedestals 59a and 59b are set, the pen holders 5 are driven by driving the fourth cylinder 59c.
9g and 59h are lowered, and the rotating plate 54 is rotated, so that the sheet body R1 supplied on the web 33 is rotated.
Is marked with a double circle by the marking pen P. This marking is used as a sewing line when sewing the circular sheet body R2.

FIG. 8 is a side view showing an embodiment of the sheet discharging mechanism. As shown in FIG.
The sheet body R1 supplied onto the original sheet placing disk 33 is cut into a circular sheet body R2 and a residual sheet body R3 by the cutting mechanism 5 (FIGS. 1, 6, and 7), and then the sheet body is discharged. The two mechanisms are configured to be discharged to the rear of the raw material drawing mechanism 2 by the mechanism. The sheet discharging mechanism includes a circular sheet discharging mechanism 6 for discharging the circular sheet R2, and a residual sheet discharging mechanism 7 for discharging the remaining residual sheet R3 from which the circular sheet R2 is taken out. .

The circular sheet discharging mechanism 6 includes an angle member at the rear of the cutting frame 12 and the base frame 11.
, A long rodless cylinder 61 bridged between columns 62 erected on the floor F, and a circular sheet body gripping means 6 moved by the rodless cylinder 61
3 is formed.

The rodless cylinder 61 includes a cylindrical body,
The cylindrical body has an unillustrated band-shaped body made of an elastic body disposed over the entire length in the longitudinal direction, and a part of the band-shaped body is elastically deformed into a convex state in the cylindrical body to form the cylindrical body. Create an upwardly convex wavy convex part that traverses the cross section, and supply compressed air to the right or left side of the wavy convex part to cause the wavy convex part to move to the left like a wave phenomenon in the cylinder. Alternatively, it is a known cylinder device configured to move to the right, and is used when a piston rod cannot be used due to spatial restrictions on the installation position.

A traveling body 61a for moving the circular sheet body gripping means 63 to the bottom of such a rodless cylinder 61.
Is provided. A part of the ceiling of the traveling body 61a fits into a depression on the lower surface of the wavy projection, and moves along with the movement of the wavy projection.

The circular sheet body gripping means 63 includes a suction hood 64 which is circular in plan view and diverges downward from the bottom of the traveling body 61a, and a suction hood 64 which spreads downward.
And a gripping finger 65 formed by hanging from the traveling body 61a. The suction hood 64 is connected to a suction device (not shown) via a flexible tube, and is driven by the suction device to drive the raw material placing disk 3.
The third circular sheet member R2 is sucked.

The gripping finger 65 has an L shape in a side view, and has an upper end rotatably supported by a lower end of a bracket 66 hanging down from a rear bottom of the traveling body 61a so as to be rotatable around a support shaft 67. I have. The gripping finger 65 abuts on the trailing edge of the suction hood 64 by excitation of a solenoid provided in the bracket 66 at the tip end, thereby gripping the circular sheet body R2 adsorbed thereby, and is provided by demagnetization of the solenoid. The circular sheet body R2 gripped by the counterclockwise rotation around the support shaft 67 by the urging force of the urging means is released.

Then, the circular sheet body gripping means 63 gripping the circular sheet body R2 on the raw sheet placing disk 33 formed by the cutting process after sucking the same, as shown by a two-dot chain line in FIG. The cylinder 61 is moved rearward by the driving of the cylinder 61, and then rotated counterclockwise around the support shaft 67 to rotate the circular sheet body R by the gripping fingers 65.
2 is released, whereby the circular sheet R2 is dropped on the floor F behind the base frame 11.

On the other hand, the residual sheet body discharging mechanism 7 has a pair of widthwise brackets 71 erected on the cutting device 1 behind the cutting frame 12, and rotates around a horizontal axis 72 between these brackets 71. It has a configuration including a pair of vertically movable discharge rollers (an upper discharge roller 73 and a lower discharge roller 74) movably supported by a shaft, and a drive motor 75 for rotating the lower discharge roller 74.

One of the brackets 71 is provided with an operation rod 76 for separating the upper discharge roller 73 and the lower discharge roller 74 from each other. With the operation of the operation rod 76, the leading end of the sheet member R1 pulled out from the raw material R (FIG. 1) is passed between the discharge rollers 74 and 75 with the two discharge rollers 74 and 75 separated from each other. The initial operation at the time of operation is completed by bringing the two discharge rollers 74 and 75 into contact with each other via the sheet member R1 by the operation of 76. Each time the circular sheet member R2 and the residual sheet member R3 are formed on the web 33 by driving the cutting mechanism 5, the lower discharge roller 74 is driven clockwise around the horizontal axis 72 by driving the drive motor 75. , A new sheet body R1 is sequentially supplied onto the source material placing disk 33.

As described in detail above, the cutting apparatus 1 of the present invention is configured such that the sheet members R1 drawn from the raw material R are automatically and sequentially cut by being driven in cooperation with each other. Have been. Therefore, the cooperative driving will be described with reference to FIGS. 9 to 12 and with reference to FIGS. 1 to 8 as necessary.

FIG. 9 shows the control means 8 of the cutting device 1.
FIG. 10 is a block diagram for explaining the operation control according to the first embodiment. FIGS. 11 to 12 are explanatory diagrams showing states of the cooperative operation of the mechanisms 2 to 7 with time.

First, as shown in FIG. 9, the cutting device 1 is provided with a control means 8 comprising a microcomputer at an appropriate position.
Based on various control signals output from the above, the material pull-out mechanism 2, the material mounting table 3, the displacement prevention mechanism 4, the cutting mechanism 5, the circular sheet discharging mechanism 6, and the residual sheet discharging mechanism 7 Operate in cooperation with each other, thereby pulling out the sheet body R1 at a predetermined pitch from the raw material R and performing a cutting process.

When the cutting apparatus 1 is operated, first, the sheet R1 is pulled out by a predetermined length from the material R mounted on the roll support shaft 23 (FIGS. 1 to 3), and the pulled sheet R1 is pulled out. , The first roller 25, the second roller 27 in the forward-lowering position, and the roller group 28 in front of the cutting mechanism 5, and further passes over the raw-sheet mounting table 3 and the upper portion of the residual sheet discharging mechanism 7. The cutting device 1 is held between the discharge roller 73 and the lower discharge roller 74, as shown in FIG.
The operation preparation of is completed. Then, after the preparation of the operation of the cutting apparatus 1 is completed, the main switch of the control means 8 is turned on, whereby the cutting process of the sheet body R1 supplied onto the web 33 is started.

As shown in FIG. 9, the control means 8 includes a first control signal 81 for instructing the air cylinder 26 of the material pulling-out mechanism 2 to retract the piston rod 261 and a fan 42 of the displacement prevention mechanism 4. Control signal 82 for instructing drive and stop of the drive motor 5 of the cutting mechanism 5
A fourth control signal 84 for instructing the first cylinder 56b, the second cylinder 57b, the third cylinder 58, and the fourth cylinder 59c of the cutting mechanism 5 to drive and stop; Fifth control signal 85,
The sixth control signal 86 and the seventh control signal 87, the eighth control signal 88 for instructing the drive motor 75 of the residual sheet discharging mechanism 7 to drive and stop, the suction / suction stop of the suction hood 64 of the circular sheet discharging mechanism 6 A ninth control signal 89 for instructing
A tenth control signal 90 for instructing a posture change between the grasping posture and the releasing posture of the grasping finger 65, and an eleventh control signal 9 for instructing driving and stopping of the rodless cylinder 61
1 is output.

Then, at the same time when the main switch of the control means 8 is turned on (at time t0 in FIG. 10), the fan 42 of the displacement prevention mechanism 4 is turned on by the second control signal 82. It comes into close contact with the surface of the original substrate mounting disk 33. Next, in the present embodiment, at time t1, the first cylinder 56b, the second cylinder 57b, and the fourth cylinder 59c are controlled by the fourth control signal 84, the fifth control signal 85, and the seventh control signal 87.
Are driven, and each of the cylinder rods 561b, 571b, 5
The first cutting blade 56e and the second cutting blade 57e are brought into contact with the sheet body R1 on the source-placed placing disk 33 by the protrusion of the 91c, and the marking pen P is also brought into a state where the pen tip is in contact with the sheet body R1. Become.

In this state, the third cylinder 58 is protruded by the sixth control signal 86, and immediately thereafter, the eleventh control signal 91
The projection of the piston rod 58a of the third cylinder 58 causes the second cutting blade 57e to move downward from the center of the rotary plate 54 as shown by the arrow in FIG. 12, thereby moving radially from the center of the sheet body R1. A straight cut C1 having a predetermined length is formed.

Next, at time t2, the piston rod 571b of the second cylinder 57b is retracted, whereby the second cutting blade 57e is separated from the sheet member R1, and the drive motor 51 is driven by the third control signal 83 at the same time. This driving is continued from the time point t2 to the time point t3, whereby the rotating plate 54 rotates 90 ° counterclockwise around the drive shaft 53 from the home position H as shown in FIG. By this rotation, an arc-shaped cut C2 is formed in the sheet body R1. At this time, an arc shape is marked on the surface of the sheet body R1 by the marking pen P.

Thereafter, the same operation as described above is performed in a state where the phase of the rotary plate 54 is displaced by 90 °.
A position shifted by 90 ° about the drive shaft 53 on the sheet body R1 by the second cutting blade 57e from the time point to the time point t4, from the time point t5 to the time point t6, and from the time point t7 to the time point t8 by the second cutting blade 57e. A straight cut C1 is formed in the cross section to obtain a cross cut. Also, from time t4, t
During the period from time t6 to time t7, and from time t8 to time t9, 9 sheets
An arc-shaped cut C2 shifted by 0 ° is formed, whereby the sheet body R1 is cut out into a circular sheet body R2 formed and a remaining sheet body R3.

Then, at time t10, the drive of the fan 42 is stopped, and the piston rod 261 of the air cylinder 26 is retracted, whereby the swing arm 271 is rotated clockwise around the roll support shaft 23, whereby FIG.
As indicated by a two-dot chain line in FIG. 1, the sheet R1 between the first roller 25 and the roller group 28 is released from the tension by the second roller 27 and is in a state of being hung.

At time t11 when this state is reached, the drive motor 75 is driven by the eighth control signal 88, and the suction hood 64 is set to the suction mode by the ninth control signal 89. As a result, the residual sheet R3 is forcibly discharged to the rear of the base frame 11 through the space between the upper discharge roller 73 and the lower discharge roller 74, and the circular sheet R2 is adsorbed by the suction hood 64. In this state, the tenth
The rodless cylinder 61 is operated by the control signal 90, whereby the circular sheet body R2 is
In the state of being gripped by 5, it is transported to the rear of the rodless cylinder 61 (to the right in FIG. 11).

Next, at time t13, the rodless cylinder 61 moves forward (leftward) by the eleventh control signal 91,
It returns to the home position shown by the solid line in FIG. afterwards,
The sheet body R1 newly supplied onto the web-placing disk 33 by driving the fan 42 is suction-fixed onto the web-placing disk 33, and swings due to the protrusion of the piston rod 261 driven by the air cylinder 26. Arm 271 is roll supporting shaft 2
It turns clockwise three times, thereby returning to the initial state in which a new sheet member R1 has been pulled out from the raw material R. Thereafter, by repeating the one-cycle operation shown in FIG. 10 of each device, the sheet members R1 from the raw material R are sequentially subjected to the cutting process, and circular sheet members R2 are formed one after another.

As described in detail above, according to the present invention, the first cutting blade 56e attached to the sheet member R1 sequentially pulled out from the material roll R by the circular motion of the rotary plate 54 on the material loading disk 33. The equipment can be reduced in size as compared with a conventional device that obtains a circular sheet by pressing with a mold, and the equipment cost can be reduced accordingly. become.

Further, since the first cutting blade 56e can adjust the distance from the center on the rotary plate 54, when the size of the circular sheet body R2 is changed,
By changing the position of the first cutting blade 56e according to its size, it is possible to easily cope with it,
It is not necessary to prepare a plurality of dies in advance according to the size of the circular sheet body as in the related art, and this can also reduce the equipment cost.

Further, since the circular sheet body R2 is obtained by performing a single cutting process with a cutting blade, no cutting chips are generated as compared with the conventional case of cutting with a saw blade. Can be reliably prevented.

[0084]

According to the sheet cutting device of the first aspect of the present invention, the cutting device comprises a raw material pulling mechanism for drawing the raw material by a predetermined size, and a predetermined size drawn by the raw material drawing mechanism. A sheet mounting table for mounting the original sheet, a displacement prevention mechanism for preventing displacement of the sheet placed on the sheet mounting table, and a state in which the displacement is prevented by the displacement prevention mechanism And a cutting mechanism that cuts out the original into a circular sheet into a circular sheet body and a residual sheet body, and separates the circular sheet body and the residual sheet body in a state where the positional deviation prevention mechanism by the positional deviation prevention mechanism is released. Is provided with a circular sheet discharging mechanism and a residual sheet discharging mechanism for discharging the sheet from the sheet mounting table. Each issued, positional deviation is prevented by raw table spread on the positional displacement prevention mechanism,
In this state, a circular sheet body and a residual sheet body are formed by performing a circular cutting process by driving the cutting mechanism, and the circular sheet body is sequentially discharged from the source mounting table by the circular sheet body discharging mechanism. The residual sheet body is also discharged by the residual sheet body discharging mechanism. Then, by associating the driving of the above mechanisms with each other, the raw material wound on the roll is automatically pulled out sequentially and subjected to a cutting process, so that a circular sheet body can be obtained one after another.

Further, the cutting mechanism is supported by the support frame above the web mounting table and rotates around a vertical axis, driving means for rotating the rotary arm, and a vertical axis And the cutting blade that cuts the web on the web table by rotating the rotating arm prevents the web from being displaced on the web table. When the rotating arm is rotated around the vertical axis by driving of the driving means in a state where the cutting blade is mounted on the sheet body, the cutting blade attached to the rotating arm travels in a circular shape on the sheet body, thereby moving the sheet. The body can be cut out in a circle. Since the distance between the vertical axis and the cutting blade is adjustable, by changing this distance, it is possible to immediately respond to circular sheets of various sizes.

As described above, according to the first aspect of the present invention, a circular sheet body is not obtained by punching a raw material by a press process using a vertical press of a cylindrical heavy press die by vertical movement. It is possible to reduce the weight of the device as compared with the device, and the equipment cost can be reduced accordingly. In addition, in the past, multiple sizes of press dies had to be prepared and placed in advance, assuming that the size of the circular sheet body changed, which increased the cost and made it extremely troublesome to replace the press dies. However, the present invention can easily and quickly cope with any size of the circular sheet by adjusting the cutting radius, and has excellent operability. Can be something.

Further, since cutting is performed one by one with a cutting blade, no cutting debris is generated, which is convenient for keeping a flexible container, which is a final product, clean.

According to the sheet cutting apparatus of the second aspect of the present invention, the positional deviation preventing mechanism comprises a plurality of through holes formed on the front and back of the sheet mounting position of the sheet mounting table. And a suction means for sucking the sheet body placed on the source table through the through-holes and bringing the sheet body into close contact with the source table, so that the sheet body is spread on the source table. By driving the suction means in a state in which the air is sucked, the air in the space below the plurality of through-holes is sucked, and this portion becomes lower in pressure than the outside air. Adhere to the mounting table.

As described above, by using the suction means, the sheet body on the source mounting table is securely fixed on the source mounting table over a wide range. It is possible to perform a suitable cutting process.

According to the sheet cutting apparatus of the third aspect of the present invention, since the rotating arm has the second cutting blade that moves by the same diameter through the center of rotation, the rotating arm is stopped. In this state, the second cutting blade is reciprocated on the rotating arm, so that a linear cut passing through the center can be made at the center of the circular sheet body. Therefore, a cross cut can be provided at the center of the circular sheet body by moving the cutting blade by shifting the rotary arm by 90 ° after one cut is obtained.

According to the sheet cutting apparatus of the fourth aspect of the present invention, the rotating arm is provided so that the distance from the vertical axis is adjustable, and the rotation of the rotating arm causes the sheet on the sheet mounting table to rotate. Since the body has the marking means for drawing a circle, the rotation arm is rotated to draw a circle on the surface of the circular sheet body by the marking means, so that the circle can be used as a lead line at the time of sewing. .

According to the sheet cutting apparatus of the fifth aspect of the present invention, the original sheet pull-out mechanism, the displacement prevention mechanism, the sheet cutting mechanism, the circular sheet discharging mechanism, and the residual sheet discharging mechanism cooperate with each other. Control means for controlling the sheet feeding mechanism, the source sheet pull-out mechanism, the displacement prevention mechanism, the sheet body cutting mechanism, the circular sheet body discharging mechanism, and the residual sheet body discharging mechanism are controlled by the control means. It operates in coordination with other mechanisms, whereby cutting processing is sequentially performed on the sheet bodies, and circular sheet bodies can be automatically obtained one after another.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a cutting device according to the present invention, showing a state before a sheet body is cut.

FIG. 2 is a perspective view showing an embodiment of the cutting apparatus according to the present invention, and shows a state where a cut sheet body is gripped and pulled out.

FIG. 3 is a side view showing an embodiment of a material drawing mechanism of the cutting device.

FIG. 4 is a plan view showing an embodiment of the source mounting table.

FIG. 5 is a cross-sectional view showing one embodiment of the source mounting table.

FIG. 6 is a perspective view showing one embodiment of a cutting mechanism.

FIG. 7 is a sectional view of the cutting mechanism shown in FIG. 6;

FIG. 8 is a side view illustrating an embodiment of a sheet discharging mechanism.

FIG. 9 is a block diagram for explaining operation control by a control unit of the cutting device.

FIG. 10 is a time schedule showing an output timing of a control signal from a control unit in one cycle of operation.

FIG. 11 is a side view for explaining the operation of the cutting device.

FIG. 12 is an explanatory diagram for explaining the operation of the cutting mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting device 11 Base frame 12 Cutting frame 13 Support leg member 14 Front support 15 Upper angle material 16 Support plate 17 Support member 2 Material pull-out mechanism 21 Bracket 22 Bearing 23 Roll support shaft 24 Material pull-out means 25 First Roller 26 Air cylinder 27 Second roller 28 Roller group 3 Material loading table 31 Frame 32 Mounting hole 33 Material loading disk 4 Position shift prevention mechanism 41 Cylindrical hood section 42 Fan 43 Support rod 5 Cutting mechanism 51 Drive motor 52 Transmission 53 Drive shaft 54 Rotating plate 54a Support post 54b Relay plate 54c First guide long hole 54d Second guide long hole 54e Bracket 54f Guide rod 55 Cutter structure 56 Circular cutting means 56a First pedestal 56b First cylinder 56c Guide rod 56d cutter Holder 56e First cutting blade 56f Fastening means 57 Cross cutting means 57a Second pedestal 57b Second cylinder 57c Guide rod 57d Cutter support piece 57e Second cutting blade 57f Stopper 58 Third cylinder 58a Piston rod 6 Circular sheet discharging mechanism 61 Rodless cylinder 62 Support 63 Circular sheet body gripping means 7 Residual sheet body discharge mechanism 71 Bracket 72 Horizontal axis 73 Upper discharge roller 74 Lower discharge roller 8 Control means R Material R1 Sheet R2 Round sheet R3 Residual sheet

Claims (5)

[Claims] 1. A sheet cutting apparatus for cutting a sheet into a circular shape, comprising: a sheet drawing mechanism for drawing a sheet by a predetermined size; and a sheet having a predetermined size drawn by the sheet drawing mechanism. The material loading table to be placed, a displacement prevention mechanism for preventing displacement of the material placed on the material loading table, and a circular sheet in a state where the displacement is prevented by the displacement prevention mechanism. A cutting mechanism that cuts the sheet into a circular sheet body and a residual sheet body, and separates the circular sheet body and the residual sheet body separately from each other in a state where the positional deviation prevention by the positional deviation prevention mechanism is released. The cutting mechanism is formed with a circular sheet discharging mechanism and a residual sheet discharging mechanism for discharging the sheet from the supporting frame, and the cutting mechanism is supported by a support frame above the raw sheet mounting table, and A rotating arm that rotates around an axis, a driving means for rotating the rotating arm, and a distance from a vertical axis is provided on the rotating arm so as to be adjustable, and the rotation of the rotating arm cuts the raw material on the source mounting table. A cutting device for a sheet body, comprising: 2. The apparatus according to claim 1, wherein the position deviation preventing mechanism comprises: a raw material mounting disk having a plurality of through holes formed in the raw material mounting position of the raw material mounting table; 2. The sheet cutting apparatus according to claim 1, further comprising: suction means for sucking the sheet member placed on the sheet holder and bringing the sheet member into close contact with the sheet mounting table. 3. The sheet cutting apparatus according to claim 1, wherein the rotary arm has a second cutting blade that moves by the same diameter through the center of rotation. 4. The rotating arm has marking means for drawing a circle on a sheet body on a web substrate by rotation of the rotating arm, and the marking means is configured to be adjustable in distance from the vertical axis. The sheet cutting device according to any one of claims 1 to 3, wherein: 5. A control means for controlling the original sheet pull-out mechanism, the displacement prevention mechanism, the sheet cutting mechanism, the circular sheet discharging mechanism and the residual sheet discharging mechanism to operate in cooperation with each other. The sheet cutting apparatus according to any one of claims 1 to 4, wherein the sheet cutting apparatus is provided.