JPH08243998A - Rotary die cutter - Google Patents

Abstract

PURPOSE: To prevent reduction in production efficiency by interruption of punching operation of a die cutter by speedily mounting-demounting and replacing a die board to a die cylinder. CONSTITUTION: An actuating shaft 24 to reciprocate in the shaft direction between an actuating position and an unactuated position is integrally and rotatably arranged in a hollow part 18a of a die cylinder 18. A first holding means 58 is arranged in a first through hole 46 of the die cylinder 18, and a second holding means 60 is arranged in a second through hole 48. Both holding means 58 and 60 move between a fixing position and a releasing position as the actuating shaft 24 moves between the actuating position and the unactuated position. The first holding means 58 has a magnet 50 to magnetically attract an iron piece 52 arranged on a die board 16. The second holding means 58 has a jaw part which can grip and fix a peripheral directional end part of the die board 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention passes a sheet material between a die cylinder and an anvil cylinder on which a die board having a punching blade is detachably wound so that the sheet material is cut by the punching blade. The present invention relates to a rotary die cutter that punches a desired shape.

[0002]

2. Description of the Related Art A rotary die cutter is preferably used as a means for punching a sheet material such as a corrugated cardboard sheet into a required shape to form a blank or the like which is a base material of a box body that can be assembled and disassembled. This rotary die cutter
A die cylinder in which a curved die board in which a punching blade of a required shape is planted is detachably wound, and a urethane material that is arranged with its axis parallel to the die cylinder and receives the cutting edge of the punching blade in a biting state. And an anvil cylinder around which the anvil is wound. Both cylinders are driven in opposite directions by an external drive source commonly connected via a gear train. Therefore, a sheet material typified by a corrugated cardboard sheet horizontally fed between both cylinders is pinched by the punching blade and the anvil and sent forward, and in this process, the sheet material is punched into a desired shape (so-called `` Soft cut ”) is applied.

[0003]

In the rotary die cutter, when the punching blade specifications change due to the order change of the sheet material, the old order die board is removed from the die cylinder, and then the new order die board is replaced. Is required. Since the die board is configured to be fixed to the die cylinder via a large number of bolts,
When removing and mounting the board, it is necessary to remove and tighten a large number of bolts, and the replacement work is extremely complicated and time-consuming. That is, since the punching operation is interrupted during the replacement work of the die board accompanying the order change of the sheet material, there is a problem that the production efficiency is lowered if the work is prolonged. In the corrugated board manufacturing industry where it is necessary to deal with order changes accompanying complicated small-lot production, as it is now, it is extremely important to shorten the cycle time in die board replacement work, and in this respect the conventional rotary die cutter It did not fully respond to the request.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the problems inherent in the above-mentioned prior art, and has been proposed in order to solve this problem. When the order of sheet material is changed, the die board is attached to and detached from the die cylinder. An object of the present invention is to provide a means capable of promptly exchanging and preventing a decrease in production efficiency due to interruption of punching operation of a die cutter.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and preferably achieve the intended purpose, the present invention has a die board in which a punching blade is planted detachably wound and rotated in a predetermined direction. A die cylinder to be driven and an anvil cylinder which is arranged parallel to the die cylinder and is driven to rotate in a direction opposite to the cylinder are provided, and the sheet material supplied between the cylinders is passed through the punching blade. In a rotary die cutter for punching into a desired shape by means of a punch, a working shaft disposed inside the die cylinder, rotatable with the cylinder and movable in the axial direction, and a non-operating position of the working shaft. Drive means for axially moving between the operating position, a plurality of through holes bored in the die cylinder and extending in the radial direction, and slidably inserted into the through holes of the die cylinder, The product A plurality of holding means that engage with the shaft and move in the radial direction as the shaft moves in the axial direction. When the working shaft is positioned at the working position, each holding means faces the fixed position and dies the die board. It is characterized in that, when the die shaft is fixed to the outer peripheral surface of the cylinder and the actuating shaft is positioned at the non-actuating position, each holding means faces the releasing position to release the fixing of the die board.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a rotary die cutter according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.

FIG. 1 schematically shows a structure of a rotary die cutter according to an embodiment, in which a required shape is provided between a pair of frames 10 and 12 which are separated in a direction intersecting with a sheet feeding direction. A die cylinder 18 detachably wound with a curved die board 16 having a punching blade 14 implanted therein.
And an anvil cylinder 20 wound with an urethane anvil that receives the cutting edge of the punching blade 14 in a bite state.
Are arranged rotatably with the axes parallel to each other with the pass line of the sheet material 22 interposed therebetween. Both cylinders 18 and 20 are rotationally driven in opposite directions by an external drive source (not shown) commonly connected via a gear train. Therefore, both cylinders 18,
A sheet material 22 typified by a corrugated cardboard sheet horizontally fed between 20 is pinched by the punching blade 14 and the anvil and sent to the downstream side.
2 is punched into the required shape. A so-called "hard cut" type in which an iron-based hard material is wound as the anvil cylinder 20 and the punching blade 14 is brought into contact with the outer peripheral surface of the cylinder to punch the sheet material 22 is also used. Can be adopted.

The die cylinder 18 is formed in a hollow shape,
A plurality of first through holes 46, which extend in the radial direction and communicate the hollow portion 18a with the outside, are bored in the peripheral wall at required intervals in the axial direction, and the first through holes 46 and the circumferential direction are formed. A plurality of second through holes 48, which extend in the radial direction and also communicate the hollow portion 18a with the outside, are formed at required intervals (90 degrees in the embodiment) and are spaced apart at required intervals in the axial direction. . As shown in FIG. 3, one end of the die board 16 in the circumferential direction is provided with a second end.
When wound around the die cylinder 18 so as to face the through holes 48, the through holes 46 are provided on the back surface corresponding to the first through holes 46.
Iron pieces 52 that can be inserted into the respective parts are fixed by screws. The iron piece 52 is configured to be magnetically attracted by the magnet 50 of the first holding means 58 described later. Also die board 16
In the vicinity of the other end in the circumferential direction, a plurality of through holes 16a are radially formed at required intervals in the width direction (axial direction of the die cylinder 18), and the screw 56 inserted from the outside into the through hole 16a.
Is screwed into a screw hole 18d formed at a corresponding position of the die cylinder 18, so that the other end of the board 16 in the circumferential direction is fixed to the die cylinder 18.
In addition, one end of the die board 16 corresponding to the second through hole 48 is gripped and fixed by a jaw portion 54 of the second holding means 60 described later.

In the hollow portion 18a of the die cylinder 18,
The operating shaft 24 is integrally rotatable and inserted so as to be movable in the axial direction. As shown in FIG. 1, the first shaft portion 24a projectingly provided on one shaft end of the operating shaft 24 is slidably fitted into a hole 18b provided at a corresponding shaft end of the die cylinder 18,
Further, the second shaft portion 24b provided at the other shaft end of the operating shaft 24
2 extends outward through a shaft hole 18c provided at the shaft end of the die cylinder 18, as shown in FIG. A housing 26 is provided outside the frame 12 on the side where the second shaft portion 24b extends (on the side away from the other frame 10), and inside the housing 26, the housing 26 is parallel to the second shaft portion 24b. The guide rails 28 are horizontally arranged. A slider 30 is slidably arranged on the guide rail 28, and the end of the second shaft portion 24b is rotatably supported by the slider 30 so as to be immovable in the axial direction. A fluid pressure cylinder 32 is arranged outside the housing 26, and a piston rod 32 a of the cylinder 32 is connected to the slider 30. That is, by urging the fluid pressure cylinder 32 forward and backward, the operating shaft 24 axially reciprocates between the operating position (FIG. 2) and the non-operating position (FIG. 4) as the slider 30 moves. .

As shown in FIG. 3, the operating shaft 24 has a quadrangular cross section, and is formed on one surface of the die cylinder 18 facing the first through holes 46 at positions corresponding to the first through holes 46. First cams 34 are provided respectively. Also, the operating shaft 24
Another surface of the die cylinder 18 facing the second through hole 48 (a surface displaced by 90 degrees in the circumferential direction from the surface on which the first cam 34 is disposed) is located at a position corresponding to each second through hole 48. The second cams 36 are provided respectively. The side surface of each first cam 34 and each second cam 36 has a cam groove 34 extending in the axial direction.
a, 36a are formed, holding means 58, 60 described later are engaged with the cam grooves 34a, 36a via followers 38, 40, and the holding means 58, 60 are moved along with the axial movement of the operating shaft 24.
60 is moved in the radial direction of the die cylinder 18.

A first holding means 58 is slidably inserted into the first through hole 46 of the die cylinder 18. This first holding means 58, as shown in FIG.
A first shaft 42 that slides along the first shaft 42
The follower 38, which is composed of a magnet 50 screw-fixed to the end facing the inside of the through hole 46 and is arranged at the end facing the hollow portion 18a of the first shaft 42, corresponds to the corresponding first cam 3.
4 is engaged with the cam groove 34a. The second holding means 60 is slidably inserted into the second through hole 48 of the die cylinder 18. The second holding means 60 includes a second shaft 44 that slides in the second through hole 48, and the shaft 44.
The follower 40 disposed at the end of the second shaft 44 facing the hollow portion 18a of the second shaft 44, and the jaw 54 formed at the end extending outward from the second through hole 48 of The second cam 36 is engaged with the cam groove 36a of the second cam 36.

The cam groove 34a of the first cam 34 holds the first shaft when the operating shaft 24 is moved from the operating position shown in FIG. 2 to the non-operating position shown in FIG. 4 (left in FIG. 2). The means 58 (first shaft 42) is pulled inward in the radial direction to face the release position (see FIG. 5) in which the magnet 50 is separated from the iron piece 52 screw-fixed to the back surface of the die board 16, and the operating shaft 24 is moved. A fixed position in which the first holding means 58 (first shaft 42) is pushed outward in the radial direction when the non-operating position is moved to the operating position, and the iron piece 52 is magnetically attracted by the magnet 50 (see FIG. 3). Is set to face.
Further, the cam groove 36a of the second cam 36 is provided with the second holding means 6 when the operating shaft 24 is moved from the operating position to the non-operating position.
0 (the second shaft 44) is pushed outward in the radial direction to face the release position (see FIG. 5) in which the jaw portion 54 is separated from the end surface of the die board 16, and the operating shaft 24 is moved from the non-operating position. When moved to the operating position, the second holding means 60
A fixed position in which the (second shaft 44) is pulled down inward in the radial direction to press the jaw portion 54 against the end surface of the die board 16.
(See Fig. 3).

[0013]

Next, the operation of the rotary die cutter according to the above-described embodiment will be described. In the state of preparation for mounting the die board 16 on the die cylinder 18, as shown in FIGS. 4 and 5, the operating shaft 24 is positioned at the non-operating position, and the first holding means 58 causes the magnet 50 to move the magnet 50 to the die cylinder 18. The second holding means 60 faces the release position inwardly spaced from the surface, and the second holding means 60 faces the release position in which the jaw 54 is outwardly spaced from the surface of the die cylinder 18. The die board 16 is positioned by abutting one end of the die board 16 in the circumferential direction on the jaw 54 of each second holding means 60 and inserting the iron piece 52 into each first through hole 46. Wind around the outer surface. At this time,
A through hole 16 formed at the other end of the die board 16 in the circumferential direction
a corresponds to the corresponding screw hole 18d of the die cylinder 18. Therefore, the screw 5 inserted from the outside into each through hole 16a
By screwing 6 into the screw hole 18d, the die board 1
One end in the circumferential direction of 6 is fixed to the die cylinder 18.

Next, the fluid pressure cylinder 32 is energized,
The actuating shaft 24 is moved from the non-actuated position to the actuated position as shown in FIG. As the actuating shaft 24 moves, the first holding means 58 causes the cam groove 34 a of the first cam 34 and the follower 38 to move.
Under the action of engaging with, the inside of the first through hole 46 is pushed outward in the radial direction to reach the fixed position, and as shown in FIG. 3, the iron piece 52 of the die board 16 is magnetically attracted by the magnet 50. . In addition, the second holding means 60 receives the engagement between the cam groove 36 a of the second cam 36 and the follower 40, and the second through hole 48.
The inside is pulled inward in the radial direction to face the fixing position, and one circumferential end of the die board 16 is gripped and fixed between the jaw 54 and the surface of the die cylinder 18. As a result, the die board 16 is securely fixed to the outer peripheral surface of the die cylinder 18.

Therefore, while the die cylinder 18 and the anvil cylinder 20 are rotationally driven, both cylinders 1
The sheet material 22 supplied between 8 and 20 is pinched by the punching blade 14 and the anvil and sent to the downstream side, and in the process, the sheet material 22 is punched into a desired shape. The operating shaft 24 rotates integrally with the die cylinder 18 in the operating position, holds the first holding means 58 and the second holding means 60 in the fixed position, and holds the die board 16 in the fixed position.

Next, when the die board 16 is to be replaced by changing the order, the screw 56 is removed, and the fluid pressure cylinder 32 is reversely biased to move the working shaft 24 from the working position to the non-working position. As shown in FIG. 5, the first holding means 58 and the second holding means 60 both move from the fixed position to the release position, and the fixation of the die board 16 by the magnet 50 and the jaw 54 is released. That is, as the actuating shaft 24 moves, the first holding means 58 causes the first through hole 4 to move.
6 is pulled inward in the radial direction, and the die board 1
The magnet 50 is separated from the iron piece 52 of No. 6. Further, the second holding means 60 is pushed up in the second through hole 48 toward the radially outer side, and is separated from the end surface of the die board 16. This allows the die board 16 to be easily removed from the outer peripheral surface of the die cylinder 18.

As described above, when the die board 16 is replaced, the operator actuates the fluid pressure cylinder 32 and at the same time, the plurality of screws 5 for fixing one end of the board 16 in the circumferential direction.
It is only necessary to remove and tighten 6, and the replacement work can be carried out in a short time and easily, and the production efficiency can be prevented from lowering due to the interruption of the punching operation. When replacing the die board 16, the screw 56 may be tightened and removed after the die board 16 is fixed and released by the holding means 58, 60. Also, die board 1
It is also possible to configure that the intermediate portion facing between the second holding means 60 and the fixing position by the screw 56 in 6 is magnetically attracted by the plurality of first holding means 58 arranged at required intervals in the circumferential direction.

(Regarding Another Embodiment) FIG. 6 shows another embodiment of the present invention, in which the die board 16 can be attached to and detached from the die cylinder 18 without the screw 56. Since the basic structure is the same as that of the above-described embodiment, only the structure of different parts will be described.

The first through hole 4 in the die cylinder 18
A plurality of third through holes 62 extending in the radial direction for communicating the hollow portion 18a with the outside are provided on the opposite side of the second through hole 48 in the circumferential direction with respect to the sixth hole. The holes are formed at required intervals in the axial direction. It should be noted that the third through hole 62 has a circumferential direction when the die board 16 is wound around the die cylinder 18 so that one end of the die board 16 faces the second through hole 48 and the iron piece 52 is inserted into the first through hole 46. It is provided at a position where the other end faces. Each of the third through holes 62 includes a third shaft 64 that slides through the through hole 62 and a jaw portion 66 formed at an end portion of the shaft 64 that extends outward from the third through hole 62. Third holding means 68 is provided. Further, the follower 70 disposed at the end of the third shaft 64 facing the hollow portion 18a is engaged with the cam groove 72a of the third cam 72 disposed at the corresponding position of the operating shaft 24.
The cam groove 72a of the third cam 72, like the cam groove 36a of the second cam 36, causes the third holding means 68 to move radially outward when the operating shaft 24 is moved from the operating position to the non-operating position. When the operating shaft 24 is moved upward from the non-operating position to the operating position while the jaw 66 is moved toward the release position separated from the end surface of the die board 16,
The holding means 68 is pulled inward in the radial direction so that the jaw 66
Is set so as to face a fixed position where it is pressed against the end surface of the die board 16.

That is, in another embodiment, the first holding means 5
8, with the second holding means 60 and the third holding means 68 facing the release position, the die board 16 is provided with the jaws 54 and the third holding means 6 of the second holding means 60 at both circumferential ends thereof.
It is wound around the die cylinder 18 so that the iron piece 52 is inserted into the first through hole 46 while being brought into contact with the jaw portion 66 of No. 8. Next, the fluid pressure cylinder 32 is urged to move the operating shaft 24 from the non-operating position to the operating position.
The die boards 16 can be fixed to the die cylinder 18 by moving 8, 60 and 68 from the release position to the fixed position. Further, when the die board 16 is removed from the die cylinder 18, the fluid pressure cylinder 32 is reversely biased to move the operation shaft 24.
The board 16 can be removed by simply moving the board from the working position to the non-working position.

(Regarding Modifications) The present application is not limited to the configuration of the above-described embodiment, and other configurations can be adopted as appropriate. For example, a large number of holding means provided with magnets are arranged at required intervals in the circumferential direction and the axial direction of the die cylinder, and iron pieces fixed at corresponding positions of the die board are magnetically attracted by the respective magnets, so that the board is attached to the die cylinder. It may be fixed. In the configuration of another embodiment,
It is possible to use a device provided with a magnet as the third holding means. Further, when a plurality of die boards are attached to the die cylinder, holding means may be arranged corresponding to the mounting positions of the die boards of the die cylinder, and the die boards may be releasably fixed by the holding means. The means for moving the operating shaft is not limited to the fluid pressure cylinder, but a motor can be used. For example, the second of the operating shaft
A structure in which a rack is fixed to a slider that supports a shaft and a pinion that meshes with the rack is rotated by a motor, or a nut is fixed to the slider and a screw shaft that is screwed into the nut is rotated by a motor is adopted. You can

[0022]

As described above, according to the rotary die cutter of the present invention, the driving means engages with the actuating shaft which is moved between the non-actuated position and the actuated position, and is released with the movement. Since the die board can be detachably fixed to the die cylinder by the holding means that moves between the position and the fixed position, the replacement work of the die board can be performed easily and in a short time. That is, it is possible to relieve the operator from the work of removing and tightening a large number of screws due to the order change, and to prevent the production efficiency from being lowered due to the interruption of the punching operation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part showing an embodiment of a rotary die cutter according to the present invention.

FIG. 2 is a longitudinal sectional view of an essential part showing a state in which an operating shaft is positioned at an operating position.

FIG. 3 is a longitudinal cross-sectional view of a main part showing a state in which a first holding means and a second holding means are positioned at a fixed position.

FIG. 4 is a vertical cross-sectional view of a main part showing a state in which an operating shaft is positioned at a non-operating position.

FIG. 5 is a longitudinal cross-sectional view of a main part showing a state in which the first holding means and the second holding means are positioned at the release position.

FIG. 6 is a longitudinal sectional view of an essential part showing another embodiment of the rotary die cutter according to the present invention.

[Explanation of symbols]

14 punching blade 16 die board 18 die cylinder 20 anvil cylinder 22 sheet material 24 working shaft 32 fluid pressure cylinder 34 first cam 36 second cam 38 follower 40 follower 46 first through hole 48 second through hole 50 magnet 52 iron piece 54 jaw 58 first holding means 60 second holding means

Claims (5)

[Claims] 1. A die board (16) having a punching blade (14) implanted therein.
A die cylinder (18) which is detachably wound and is driven to rotate in a predetermined direction, and an anvil cylinder which is disposed parallel to the die cylinder (18) and is driven to rotate in a direction opposite to the cylinder (18). (20) and a rotary die cutter for punching a sheet material (22) supplied between both cylinders (18, 20) into a desired shape through the punching blade (14), wherein the die cylinder (18) is installed inside the cylinder (1
8) Actuating shaft that can rotate integrally with and is movable in the axial direction
(24), a driving means (32) for axially moving the operating shaft (24) between an operating position and a non-operating position, and a die cylinder (18) having a hole extending in the radial direction. Through the plurality of through holes (46, 48) and the through holes (46, 48) of the die cylinder (18) slidably, and engaging with the operating shaft (24) to move in the axial direction. It is composed of a plurality of holding means (58, 60) that move in the radial direction along with, and when the operating shaft (24) is positioned in the operating position, each holding means (58, 60) faces the fixed position. When the die board (16) is fixed to the outer peripheral surface of the die cylinder (18) and the actuating shaft (24) is positioned in the non-actuated position, each holding means (58, 60) faces the release position and the die board (16 ) The rotary die cutter characterized by being configured to release the fixing. 2. Each holding means (58, 58) on the operating shaft (24)
The cam (34, 36) is arranged at a position corresponding to the (60), and the cam (34, 36)
By engaging the follower (38, 40) disposed in the holding means (58, 60) with the (36) and moving the operating shaft (24) between the operating position and the non-operating position, the cam (34, The rotary die cutter according to claim 1, wherein the holding means (58, 60) is configured to move between a fixed position and a released position under the engagement action of the 36) and the follower (38, 40). 3. An iron piece (52) is disposed on the back surface of the die board (16) corresponding to each through hole (46) of the die cylinder (18), and the iron piece (52) is retained by the holding means (58). The rotary die cutter according to claim 1, wherein the die board (16) is fixed by magnetic attraction by a magnet (50). 4. The holding means (60) inserted through the through hole (48) corresponding to the circumferential end portion of the die board (16) wound around the outer peripheral surface of the die cylinder (18) has a jaw portion. (54), the holding means (60) is moved from the release position to the fixed position so as to grip and fix the end of the die board (16) between the jaw (54) and the cylinder outer peripheral surface. The rotary die cutter according to claim 1, 2 or 3. 5. The holding means (60) inserted through the through hole (48) corresponding to one end in the circumferential direction of the die board (16) wound around the outer peripheral surface of the die cylinder (18) has a jaw portion. (54), the jaws (54) to releasably grasp and fix the end of the die board (16), the through hole (46) on the back surface facing the intermediate portion in the circumferential direction of the die board (16) The holding means in which an insertable iron piece (52) is arranged and the iron piece (52) is arranged in the through hole (46)
The magnet (50) of (58) removably attracts magnetic force, and the vicinity of the end opposite to the end of the die board (16) that is gripped and fixed by the jaw (54) is dies with a plurality of screws (56). Cylinder (1
The rotary die cutter according to claim 1 or 2, wherein the rotary die cutter is fixed to (8).