JP2008055553A - Punching method, punching device and cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To favorably carry out the punching of parts being four corners of a stupe medicine product on textile for a long period of time. <P>SOLUTION: This punching method punches patterns at constant intervals in the passing direction on the belt type textile M1 passing between a punching blade 9 and an anvil roll 8 by rotating the punching blade 9 provided with a knife edge 16a forming the patterns to punch at equal distances from a rotating shaft and the anvil roll having a rotating shaft in parallel with the former rotating shaft in opposite directions of each other. The peripheral velocity of the knife edge and the passing speed of the textile are made equal to each other, and the peripheral velocity of the anvil roll is made lower than the peripheral velocity of the knife edge. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting device for cutting a rectangular product from a raw fabric.

A poultice in which a medicine containing anti-inflammatory and analgesic components is applied to a base sheet such as a nonwoven fabric or a resin sheet is used for the treatment of muscle pain, stiff shoulders, or treatment of sprains.
In such a poultice, a protective material for protecting the applied medicine is attached to the surface of the medicine, and the protective material is peeled off during use.
By the way, the poultice is usually covered with clothing that is attached to the affected area and worn. In that case, it is known that the clothes and the base sheet rub against each other in daily activities, and a perfect rectangular poultice easily turns over from four corners. On the other hand, it is also known that the degree of turning can be reduced by eliminating the corners at the four corners to make them round or by combining the four corners with an obtuse angle.

  Patent Document 1 discloses a technique for processing four corners of a product into a round when carving a pre-cutting poultice (hereinafter referred to as “raw fabric”) coated with a chemical on a base sheet and protected with a protective material. Is disclosed. The technique disclosed in Patent Document 1 divides an original fabric into three strips by a slitter device, and then divides it into products by a rotary cutter 71 shown in FIG. The rotating cutter 71 is provided with three rows of axially extending convex blades 72,..., 72 that cut the divided strips in the feed direction with a predetermined interval in the circumferential direction. ..., 72 are provided with bifurcated round portions 73, ..., 73 for forming rounds at the four corners of the product.

However, the rotary cutter 71 in Patent Document 1 needs to strongly press the rotary cutter 71 against a belt-like object by hydraulic pressure or the like so as not to leave uncut parts over the entire convex blades 72. . Therefore, the blade edge is severely damaged by friction with the anvil rolls that receive the convex blades 72,..., 72 on the opposite side of the belt-like object, and the complicated work of replacing the entire rotary cutter 71 has to be frequently performed.
In order to solve this problem, the present applicant, in the previous application (Japanese Patent Application No. 2005-340992), punched four corners from the original fabric, then cut the four sides into one compress product, and the cutter that punched four corners. Disclosed is a cutter that can easily replace only the blade. FIG. 9 is a front view of the cutter 74, and FIG. 10 is a side view of the cutter 74. The cutter 74 comprises a blade portion 76 having a star-shaped blade 75 in a front view and a support portion 77 for supporting the blade portion 76. The blade portion 76 includes four hexagonal bolts BT,. It is detachably fixed to the support part 77 by BT.
JP 2004-17272 A

The cutter 74 having the configuration shown in FIGS. 9 and 10 can easily replace the worn cutter 74 and consumes less blade than the rotary cutter 71 shown in Patent Document 1.
The cutter 74 can achieve a certain effect as described above. However, when used for a long time, the non-woven fabric, which is a base sheet, cannot be completely cut, and punching tends to be incomplete, and the cutter 74 is opposed to the cutter 74. In this respect, the peripheral surface of the anvil roll (corresponding to the first anvil roll 8 in FIG. 1) is likely to be damaged.

  The present invention has been made in view of the above-described problems, and provides a punching method, a punching device, and a cutting device that can perform good punching of the four corners of the poultice product in the raw material for a long time. With the goal.

In order to achieve the above object, the present invention takes the following technical means.
That is, in the punching method according to the present invention, a punching blade having a cutting edge forming a figure to be punched at an equal distance from the rotation axis and an anvil roll having a rotation axis parallel to the rotation axis are rotated in opposite directions. A punching method in which the figure is punched at a predetermined interval in a passing direction in a strip-shaped original fabric passing between them, wherein the peripheral speed of the cutting edge is equal to the passage speed of the original fabric, and the anvil roll Is made slower than the peripheral speed of the cutting edge.
The punching device according to the present invention includes a punching blade having a cutting edge that forms a figure to be punched at an equal distance from the rotation axis, a rotation axis parallel to the rotation axis, and a peripheral surface thereof in contact with the cutting edge. A rotatable anvil roll, first rotating means for rotating the punching blade around its rotation axis, and second rotating means for rotating the anvil roll around its rotation axis in the direction opposite to the rotation of the punching blade And the second rotating means is configured such that the peripheral speed in the rotation of the anvil roll is slower than the peripheral speed of the cutting edge of the punching blade rotated by the first rotating means. .

The cutting device according to the present invention is a cutting device that cuts a substantially rectangular product from a strip-shaped raw material having a specific width and long in the conveying direction, and a plurality of the figure punching devices arranged at equal intervals in the width direction A slitter device that cuts between graphic traces adjacent to each other in the transport direction in the raw material punched by the graphic punching device, and the adjacent material in the width direction of the raw material cut into strips by the slitter device. A shredding device for cutting between graphic traces.
In the above invention, the “graphic trace” means a hole penetrating the front and back of the original after the figure formed by the cutting edge of the punching blade in the original is punched. What is referred to as “graphic trace” after being cut by the slitter device means one “graphic trace” after being divided into two by the slitter device. In addition, the “rotary axis” refers to a central straight line in the rotational motion.

  According to the present invention, it is possible to provide a punching method, a punching device, and a cutting device that can perform good punching of the four corners of the poultice product in the raw material for a long time.

1 is a configuration diagram of a cutting device 1 according to the present invention, FIG. 2 is a schematic side view of the cutting device, FIG. 3 is a schematic plan view of the cutting device, FIG. 4 is a front view of the cutter 9, and FIG. FIG. 6 and FIG. 6 are perspective views of the first anvil roll 8 after operating the cutting device 1.
1 to 3, the cutting device 1 includes a supply device 2, a punching device 3, a slitter device 4, a cutting device 5, and the like.
Hereinafter, the material to be cut supplied from the supply device 2 is “original fabric M1”, the material M1 is punched by the punching device 3 and the punched pieces are removed, “punched product M2”, and punched product M2. Is cut in the width direction by the slitter device 4, and the product obtained by cutting the belt M 3 by the cutting device 5 may be called “product”. The “punched piece” means a piece cut from the original fabric M1.

  The supply device 2 is for continuously feeding out the original fabric M1 wound up in a roll shape in the longitudinal direction. The original fabric M1 is an object to be cut by the cutting device 1, and it has an anti-inflammatory and analgesic component on a base sheet made of a non-woven fabric such as polyamide (nylon), polyester, polyacryl, or cotton, or a sheet made of synthetic resin. The chemical | medical agent containing is apply | coated, and protective materials, such as a polypropylene film for protecting a chemical | medical agent, are bonded together. The feeding device 2 feeds the original fabric M1 while controlling the rotation of the shaft 6 that supports the original fabric M1 by a servo motor (not shown).

The punching device 3 includes a rotary cutter 7 and a first anvil roll 8.
The rotary cutter 7 is formed by connecting a plurality of cutters 9,..., 9, and the cutter 9 includes a support portion 10 and a blade portion 11.
The support portion 10 is a thick disk, and a part of the circumference of the support portion 10 is processed into a flat surface 12, and the surface 12 is provided with a receiving hole 13 having a substantially circular cross section. Cutter shafts 15, 15 extend outwardly at right angles to the side surfaces 14, 14 on both side surfaces 14, 14 of the support portion 10.
As shown well in FIG. 4, the blade portion 11 includes a blade 16 having a star shape in plan view in which four quarter-arcs are arranged in a line so that all of them are convex inward, 16 and a base portion 17 that supports 16. As the blade 16 is well shown in FIG. 5, the blade edge 16a is an arc centered on the axis of the cutter shafts 15 and 15 in a side view, so that the blade edge 16a can punch the raw fabric M1. It is sharply formed. The base portion 17 is formed in a substantially circular shape so that the cross-sectional shape can be fitted into the accommodation hole 13, and has four screw holes 18,. A portion of the base portion 17 is fitted into the receiving hole 13 so that the star-shaped apex is positioned in the conveying direction of the original fabric M1 and in a direction orthogonal to the conveying direction, and is passed through the screw holes 18,. It is fixed to the support portion 10 by four hexagonal bolts BT, ..., BT. The blade part 11 is made of blade steel.

  As shown well in FIG. 3, the rotary cutter 7 is configured by connecting cutter shafts 15, 15 of a plurality of cutters 9,. The rotary cutter 7 is not shown at a position where excessive deflection is unlikely to occur in the cutter shafts 15,..., 15 when pressed on the first anvil roll 8 side, for example, at positions BB and CC in FIG. A bearing 20 of the cutter support 19 is rotatably supported via a bearing. The bearing 20 is fixedly connected to the ball screw 21 and configured to be movable with respect to the cutter support base 19. Each of the cutters 9,..., 9 can adjust the distance from the opposing first anvil roll 8 by moving the bearing 20 in the left-right direction in FIG. 2 according to the rotation of the ball screw shaft 22. The rotary cutter 7 and the first anvil roll 8 are both connected to separate servo motors (not shown) by timing pulleys and timing belts, and rotate intermittently in accordance with the operation of the moving blade 33 of the severing device 5 described later. To be controlled.

The first anvil roll 8 is a cylindrical roll having an uneven surface with a polished peripheral surface, and is disposed in the cutting device 1 so that the rotation axis thereof is parallel to the rotation axis of the rotary cutter 7. The bearing 24 of the support base 23 is rotatably supported via a bearing (not shown). The first support base 23 is configured to be pressed toward the rotary cutter 7 by a hydraulic cylinder 25. The first anvil roll 8 is made of cutlery steel, which is inferior in wear resistance to the blade part 11.
The slitter device 4 includes a slitter 26, a second anvil roll 27, and the like.
As shown in FIG. 3, the slitter 26 has a plurality of circular round blades 28,..., 28 on the peripheral surface of a cylindrical roll. Each of the round blades 28,..., 28 is arranged with a certain interval in the axial direction, and the interval is adjusted so as to be the longitudinal length of the product after being cut by the cutting device 1. Has been. The slitter 26 is arranged in the cutting apparatus 1 so that the rotation axis thereof is parallel to the rotation axis of the rotary cutter 7. Both ends of the slitter 26 are rotatably supported by bearings 30 of a slitter support base 29 via bearings (not shown). The slitter support 29 is configured to be pressed toward the second anvil roll 27 by a hydraulic cylinder 31.

The second anvil roll 27 is a cylindrical roll having an uneven surface whose peripheral surface is polished, and is arranged so that its rotation axis is parallel to the rotation axis of the slitter 26, and both ends are supported by bearings of a support base (not shown). It is supported rotatably. One end of the second anvil roll 27 is connected to a servo motor (not shown) by a timing belt, and is controlled to rotate in association with the operation of the moving blade 33 of the cutting device 5.
The severing device 5 severs the strip M3 on the same principle as a so-called guillotine cutter, and has a structure in which a fixed blade 32 and a movable blade 33 having a slight angle with respect to the fixed blade 32 are engaged. The movable blade 33 is configured to be able to approach and separate from the fixed blade 32, and the timing of the proximity and separation is controlled in association with intermittent feeding of the original fabric M1. The moving and moving operation of the moving blade 33 is performed by a hydraulic cylinder (not shown).

Between the punching device 3 and the slitter device 4, a collecting device 34 for collecting the punched pieces punched by the punching device 3 is provided. One collection device 34 is arranged at a position facing each star-shaped cut formed by the punching device 3. The collection device 34 cuts the punched piece from the punched article M2 in which the star-shaped cut is formed by the rotary cutter 7 and blows it off into the collection container 35 with air pressure.
In the portion of the cutting device 1 facing the recovery device 34, guides 36 and 37 provided with passage holes through which the punched pieces can pass are provided so as to sandwich the original fabric M1.

Further, a collection container 35 is provided on the opposite side of the collection device 34 with the guides 36 and 37 in the middle, with the collection port 38 facing the passage hole.
Next, the operation of the cutting device 1 will be described.
After the original fabric M1 is passed through the supply device 2, the punching device 3, the guides 36 and 37, the slitter device 4 and the cutting device 5, the original fabric M1 is intermittently drawn from the supply device 2 and cut. Is done.
When the original fabric M1 is fed out, the rotary cutter 7 and the first anvil roll 8 rotate in opposite directions in accordance with the feeding speed of the original fabric M1 and pass between the rotary cutter 7 and the first anvil roll 8. A star-shaped cut is formed in the anti-M1. Further, when the original fabric M1 is fed out and a star-shaped cut enters between the guides 36 and 37 and reaches the passage hole 50, the supply device 2 stops the feeding of the original fabric M1.

Here, the relationship in the shape of the cutter 9 and the 1st anvil roll 8 required in order to form the star-shaped notch in the raw fabric M1 is demonstrated.
The cutter 9 sandwiches the original fabric M1 between the cutter 9 and the first anvil roll 8 as described above, and the blade 16 forms a star-shaped cut in the original fabric M1 while rotating. In order to completely cut the punched piece cut from the punched object M2 by the recovery device 34, the blade edge 16a of the blade 16 is formed at the part from one side to the other side in the circumferential direction when the cutter 9 is rotated. Must always touch the peripheral surface of the first anvil roll 8 while moving. Therefore, the cutting edge 16a of the cutter 9 is an arc centered on the axis of the cutter shafts 15 and 15 in a side view. Therefore, as shown in FIG. 5, when the blade edge 16 a is overlapped with the cutter 9 by crossing the section perpendicular to the rotation axis of the first anvil roll 8 with the rotation center coincident, the entire blade edge 16 a has the radius R. It is comprised so that it may be located on the outer periphery of 1 anvil roll 8. FIG.

Then, when forming a star-shaped cut, the rotation of the rotary cutter 7 and the first anvil roll 8 is independently controlled by a servo motor. The peripheral speed of the first anvil roll 8 when the star-shaped cut is formed in the original fabric M1 is set slower than the peripheral speed of the cutting edge 16a of the rotary cutter 7, that is, the feed speed of the original fabric M1. For example, the rotation of the first anvil roll 8 is controlled so that the peripheral speed is 0.95 times the peripheral speed of the cutting edge 16 a of the rotary cutter 7.
Now, when a cut | notch is formed in the raw fabric M1 and feeding stops, the rotary cutter 7 and the 1st anvil roll 8 will stop rotation. The star-shaped cut portion (punched piece) is separated from the original fabric M1 by the recovery device 34 and is recovered in the recovery container 35 via the passage hole and the recovery port 38.

While the supply device 2 stops the feeding of the raw fabric M1 and the recovery device 34 recovers the punched piece, in the shredding device 5, the movable blade 33 is engaged with the fixed blade 32, and the belt M3 is predetermined. Shredding is performed to obtain a product of a length of.
When a predetermined time elapses after the feeding device 2 stops feeding the original fabric M1, the feeding device 2 starts feeding the original fabric M1 again. In the cutting device 5, the movable blade 33 is separated from the fixed blade 32 until the supply device 2 starts to be ready for the next cutting operation.
The slitter device 4 cuts between the punched traces of the punched material M2 that has passed through the recovery device 34 when the supply device 2 is being fed, and cuts the strips M3 into a strip-shaped material M3 having a predetermined width.

In the shredding device 5, the strip M3 is cut between punch marks in the width direction and cut into products of a predetermined length. The shredding device 5 is installed at a location where a portion (punching trace) to be shredded is required so that the strip M3 becomes a product when the feeding of the raw fabric M1 is stopped.
The feeding device 2 feeds and stops the original fabric M1, the rotation of the rotary cutter 7 and the first anvil roll 8, the operation of the recovery device 34, the rotation of the second anvil roll 27, and the operation of the movable blade 33 of the shredding device 5, This is appropriately performed by a control device (not shown).
In the punching device 3 in the cutting device 1 according to the present invention, the first anvil roll 8 is made of a material inferior in wear resistance as compared with the blade portion 11 in order to reduce the wear of the blade edge 16a. For this reason, the peripheral surface of the first anvil roll 8 is slightly worn when the cutting edge 16a punches the raw fabric M1. However, the punching device 3 is configured so that the rotation radius of the blade edge 16a and the rotation radius of the first anvil roll 8 are the same, and the peripheral speed of the blade edge 16a is faster than the peripheral speed of the first anvil roll 8 during the punching operation. Is set to Accordingly, as shown in FIG. 6, the first anvil roll 8 has a portion Tw in contact with the blade edge 16 a every time the cutter 9 makes one rotation, that is, a portion where the peripheral surface of the first anvil roll 8 is worn slightly. The wear of the peripheral surface of the 1 anvil roll 8 is distributed over the entire peripheral surface, and the first anvil roll 8 can be used for a long time.

In this way, by setting the peripheral speed of the first anvil roll 8 to be slower than the peripheral speed of the rotary cutter 7, the wear of the first anvil roll 8 is evenly distributed over the entire peripheral surface, and the function is extended for a long time. Can be maintained. And the punching apparatus 3 can perform the favorable cutting | disconnection of the fiber of the nonwoven fabric which is a base sheet also in a continuous operation for a long time.
Further, by making the peripheral speed of the first anvil roll 8 slower than the peripheral speed of the rotary cutter 7, the cutting edge 16 a moves so as to slightly rub the peripheral surface of the first anvil roll 8 (for example, like a toothpaste). And cut the fibers of the nonwoven fabric. Therefore, the cutting edge 16a can perform good punching even if it is worn slightly by continuous operation for a long time, and the punching device 3 performs the punching operation of the raw fabric M1 for a long time without causing uncut fibers of the nonwoven fabric. Can continue.

For example, the first anvil roll 8 having a diameter (2R) of 67.83 mm, and the cutter 9 having one blade portion 11 shown in FIGS. 4 and 5 and the rotation radius of the blade edge 16a being the same as the rotation radius of the first anvil roll 8 are shown. When the peripheral speed of the first anvil roll 8 was set to 0.95 times the peripheral speed of the rotary cutter 7 and the blank M1 was punched (the number of punches was 70 times / minute), about 1.8 million Even when the original fabric M1 was punched continuously, the punching device 3 was able to maintain good punching without leaving uncut fibers of the nonwoven fabric.
The peripheral speed of the first anvil roll 8 is preferably in the range of 0.97 to 0.85 times the peripheral speed of the rotary cutter 7.

FIG. 7 is a side view of a punching device 3B having a cutter 9B provided with four blade portions 11.
Four blade portions 11, ..., 11 are attached to the peripheral surface of the cutter 9B at intervals of 90 degrees. The blade edges 16a, ..., 16 of the blade portions 11, ..., 11 are configured to form a part of the outer periphery when overlapped with the first anvil roll 8B in a side view, The rotation radius of the blade edges 16a, ..., 16a is the same as the rotation radius RB of the first anvil roll 8B. In the punching device 3B, the punching operation of one blade portion 11 is at a rate of once every four times, that is, one-fourth the number of times of the punching device 3 in FIG. 1, and the possible continuous operation time (number of punching) is 4 times the punching device 3 in FIG.

Also in the punching device 3B, the peripheral speed of the first anvil roll 8B is set slower than the peripheral speed of the cutter 9B, and the worn portions of the peripheral surface of the first anvil roll 8B are shifted little by little, so that the blade portions 11,. 11 is maintained for a long time, and the first anvil roll 8B can also be operated continuously for a long time.
The punching device 3 can be configured such that the rotational radius of the cutting edge 16a of the cutter 9 and the rotational radius of the first anvil roll 8 are different. For example, by setting the radius of the first anvil roll to be larger than the rotation radius of the cutting edge 16a of the cutter 9 and setting the peripheral speed of the cutting edge 16a to be faster than the peripheral speed of the first anvil roll, the cutting edge 16a If the peripheral surface of the first anvil roll is moved so as to be slightly rubbed, the fibers of the nonwoven fabric can be continuously cut in the punching operation even after the cutting edge 16a is slightly worn.

When the the rotation radius of the rotation of the cutting edge 16a of the cutter 9 radius and first anvil roll 8 differs from the turning radius R ₂ of the first anvil roll is made larger than the rotational radius R ₁ of the cutting edge of the cutter, and Designing the cutter blade tip radius R ₁ and the first anvil roll radius R ₂ to have the following relationship disperses the wear on the peripheral surface of the first anvil roll and enables long-term operation. Therefore, it is preferable.
R ₂ ≠ N × α × R ₁ (1)
Here, α is (peripheral speed of the first anvil roll) / (peripheral speed of the blade edge of the cutter), and N is an integer of 1 or more. By setting the peripheral speed of the cutting edge of the cutter that satisfies the expression (1) and the peripheral speed of the first anvil roll, the worn portion of the peripheral surface of the first anvil roll can be shifted little by little, and the cutting edge 16a Even after some wear, the nonwoven fabric fibers can continue to be cut in the punching operation.

  In the above-described embodiment, the cutters 9 and 9B are provided with two blade parts 11 and 11 attached at intervals of 180 degrees as shown in FIG. 10, or three blade parts 11 at equal intervals in the circumferential direction. It is good also as five or more. The shape of the blade 16 in plan view is not limited to a star shape. For example, an ellipse, an ellipse, or a 4n square (n ≧ 1) is divided into four equal parts so as to include the centroids, respectively, and the sides facing the centroids. When the blade portion 11 is attached to the support portion 10, the discontinuous points may be positioned in the transport direction of the original fabric M1 and the direction orthogonal to the transport direction.

  In addition, each structure of the cutting device 1, the supply device 2, the punching device 3, the collection device 34, the slitter device 4, and the cutting device 5 or the overall structure, shape, dimensions, number, material, and the like are in accordance with the spirit of the present invention. Can be changed as appropriate.

  INDUSTRIAL APPLICABILITY The present invention can be used for a step of cutting a rectangular product from a raw fabric, for example, a step of cutting a raw fabric coated with a medicine having a poultice effect into products of a predetermined size.

It is a block diagram of the cutting device which concerns on this invention. It is a side schematic diagram of a cutting device. It is a plane schematic diagram of a cutting device. It is a front view of a cutter. It is a side view of a cutter. It is a perspective view of the 1st anvil roll after operating a cutting device. It is a side view of the punching apparatus which has a cutter provided with four blade parts. It is a top view of the rotary cutter in a prior art. It is a front view of a cutter. It is a side view of a cutter.

Explanation of symbols

1 Cutting device 3 Punching device (Punching device)
4 Slitter device 5 Shredding device 8 Anvil roll (first anvil roll)
9 Punching blade (cutter)
16a Cutting edge M1 Original fabric M2 Stamped blank (punched)
M3 Original material that has become a band (band)

Claims (3)

A strip-shaped blade that passes between a punching blade having a cutting edge that forms a figure to be punched at an equal distance from the rotating shaft and an anvil roll having a rotating shaft parallel to the rotating shaft in opposite directions. A punching method in which the figure is punched at regular intervals in the passing direction on the original fabric,
Equalize the peripheral speed of the cutting edge and the passing speed of the original fabric,
The punching method, wherein the peripheral speed of the anvil roll is made slower than the peripheral speed of the cutting edge. A punching blade having a cutting edge that forms a figure to be punched at an equal distance from the rotation axis;
An anvil roll having a rotation axis parallel to the rotation axis and rotatable with its peripheral surface in contact with the cutting edge;
First rotating means for rotating the punching blade around its rotation axis;
A second rotating means for rotating the anvil roll around its rotation axis in a direction opposite to the direction of the punching blade, the second rotating means,
The punching device, wherein the peripheral speed in the rotation of the anvil roll is slower than the peripheral speed of the cutting edge of the punching blade rotated by the first rotating means. A cutting device for cutting a substantially rectangular product from a strip-shaped raw material having a specific width and long in the conveying direction,
The figure punching device according to claim 2, wherein a plurality of the punching devices are arranged at equal intervals in the width direction,
A slitter device that cuts between adjacent graphic traces in the transport direction punched by the graphic punching device;
A cutting device that cuts between adjacent traces in the width direction of the raw material cut by the slitter device.

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