JPH0551597U - Device for removing punching dust in rotary die cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] In a device for removing sheet punching scraps remaining in an annular punching blade by swinging an ejecting arm whose tip portion is located inside the punching blade, a die cylinder having the punching blade on the outer periphery is provided. Easier processing and shorter setup work time due to changes in punching work. [Structure] A die board 12 having a punching blade 13 is detachably attached to the outer periphery of a die cylinder 11. Punching blade 1
A central portion of a protruding arm 16 having a tip portion located inside from the arm insertion hole 15 formed in 3 is swingably attached to the die board 11 by a pin 19. A pin cylinder 21 that rotates at the same speed as the die cylinder is provided around the die cylinder 11. A pin board 22 having a pressing pin 24 is detachably attached to the outer periphery of the pin cylinder 21. The rear end portion of the protruding arm 16 is pressed by the pressing pin 24, and the punching waste A is pushed out from inside the punching blade 13 by the swinging of the protruding arm 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punch dust removing device for a rotary die cutter that punches a sheet such as a corrugated cardboard sheet into a predetermined shape.

[0002]

[Prior Art]

 The die cylinder and the anvil cylinder rotate in opposite directions, and the punching blade of the die board provided on the outer periphery of the die cylinder bites into the elastic body such as urethane rubber provided on the outer periphery of the anvil cylinder and feeds them between both cylinders. A rotary die cutter for punching a sheet such as a corrugated cardboard sheet into a predetermined shape has been conventionally known.

In the above rotary die cutter, an ejection elastic body having a thickness thicker than the blade depth of the punching blade is usually attached to the inside of the punching blade of the die cylinder so that the elastic body is deformed by compression when punching the sheet. The resilience is used to push out the punching scraps remaining in the punching blade. However, since the punching dust is tightly fitted inside the punching blade, the punching dust cannot be completely removed only by the elasticity of the elastic body.

In view of this, in the invention disclosed in Japanese Patent Publication No. 58-20760, a punching scrap remover having a notch formed in the punching blade and having one end positioned inside the punching blade inserted into the notch is disclosed. The other end is swingably supported, and the punch scrap removal tool is swung so that the punch scrap remaining in the punch blade is pushed out.

[0005]

[Problems to be solved by the device]

 By the way, in the punching scrap removal device described in the above publication, an extrusion cylinder is provided at an eccentric position inside the die cylinder that supports the punching blade, and it rotates together with the die cylinder, and the radius of the radius is increased by the cam action of the extrusion cylinder. Since the punching scrap remover is swung by the pushing rod that moves in the same direction, it is necessary to form through holes through which the pushing rod is inserted in the die cylinder and the die board. There is an inconvenience that it takes time to process the Linda and the die board.

Further, since the positions of the punching blades and the through holes differ depending on the punching shape of the sheet, the through holes are formed in the die cylinder in correspondence with the punching scrap remover attached to the die board every time the punching work is changed. It is necessary to replace the extrusion rod with the through hole, which is very troublesome to set up.

It is a technical object of the present invention to solve the above-mentioned inconvenience, to facilitate the machining of the die cylinder, and to shorten the setup work time accompanying the change of the punching work.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, in the present invention, a die board is attached to the outer periphery of a die cylinder, an arm insertion hole is formed in an annular punching blade provided on the die board, and the arm insertion hole is inserted into the arm insertion hole. A projecting arm whose tip faces the inside of the punching blade is swingably attached to the die board, and the projecting arm is swung to push out the punching chips remaining in the punching blade to the outside. In the removing device, the center part between both ends of the protruding arm is swingably supported, and a pin cylinder that rotates at the same speed as the die cylinder is provided around the die cylinder, and it is detachably attached to the outer periphery of the pin cylinder. The pin board is provided with a pressing pin that pushes down the rear end of the protruding arm.

[0009]

[Action]

 In the device for removing punching dust having the above structure, the pushing pin pushes the rear end of the push-out arm to swing the push-out arm, so that the punching dust remaining between the punching blades at the front end of the push-out arm is removed to the outside. Press to remove the punching chips from between the punching blades.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, an anvil cylinder 1 is provided on a transfer path of a sheet S such as a corrugated cardboard sheet conveyed in one direction, and a die cylinder 11 is provided below the anvil cylinder 1. Further, a pin cylinder 21 is provided on the lower side of one side of the die cylinder 11, and these cylinders 1, 11, 21 are rotated at the same speed in the arrow direction.

An elastic body 2 such as urethane rubber is provided on the outer periphery of the anvil cylinder 1. On the other hand, a die board 12 is removably attached to the outer periphery of the die cylinder 11 via means such as screwing.

2 and 3 show details of the die board 12. The die board 12 is provided with an annular punching blade 13 that punches the sheet S into a predetermined shape by biting the cutting edge into the elastic body 2 of the anvil cylinder 1. Further, a square hole 14 is provided on the rear side of the punching blade 13 in the rotation direction.

An arm insertion hole 15 is formed in the punching blade 13. A tip portion of a protruding arm 16 is inserted into the arm insertion hole 15, and a protruding plate 17 is attached to the tip portion of the protruding arm 16 located inside the punching blade 13.

A central portion in the length direction of the protruding arm 16 is swingably supported by a bracket 18 mounted in the square hole 14 via a pin 19. The rear end of the protruding arm 16 is pressed outward by a spring 20 incorporated in the square hole 14.

FIG. 4 shows details of the pin cylinder 21. A pin board 22 is detachably supported on the outer periphery of the pin cylinder 21 by means such as screwing. A cylindrical pin holder 23 is attached to the pin board 22 corresponding to the rear end of the protruding arm 16, and the rear end of the pressing pin 24 is slidably inserted into the pin holder 23. The pressing pin 24 is pressed outward by a spring 25 incorporated inside the pin holder 23, and a flange 26 provided at the rear end of the pressing pin 24 forms a shoulder portion formed on the inner circumference of the pin holder 23. It is pressed against 27.

The pin board 22 having the above structure is paired with the die board 12 having the punching blade 13, and is pressed by attaching the die board 12 and the pin board 22 to predetermined positions of the die cylinder 11 and the pin cylinder 21, respectively. The pin 24 is adapted to project from the rear end of the arm 16.

The rotary die cutter shown in the embodiment has the above-mentioned structure, and when punching the sheet S, the cylinders 1, 11, 21 are rotated in the direction of the arrow in FIG. The sheet S is fed between the die 1 and the die cylinder 11, and the punching blade 13 cuts into the elastic body 2 of the anvil cylinder 1 to punch the sheet S into a predetermined shape. At the time of punching, as shown in FIG. 2, the punching dust A enters the inside of the punching blade 13, and the tip of the ejecting arm 16 is pushed by the punching dust A. Therefore, the ejecting arm 16 swings around the pin 19 and the tip of the ejecting arm 16 is pushed into the punching blade 13 due to the action of the punching waste A adhering to the inner circumference of the punching blade 13. Held in.

The punching waste A is conveyed in the circumferential direction by the rotation of the die cylinder 11. As shown in FIG. 4, when the rear end of the protruding arm 16 faces the pressing pin 24, the pressing pin 24 presses the rear end of the protruding arm 16. Therefore, the ejecting arm 16 swings around the pin 19 and the tip moves in the outer diameter direction of the die cylinder 11, and the punching scraps A are removed by the ejecting plate 17 provided at the tip of the ejecting arm 16. It is extruded from inside the punching blade 13.

In the embodiment, the pressing pin 24 is slidably supported, but the pressing pin 24 may be fixed to the pin board 22.

[0020]

[Effect of the device]

 As described above, in the device for removing punching scraps according to the present invention, the pin cylinder is provided around the die cylinder, the pin board having the pressing pin is attached to the outer periphery of the pin cylinder, and the rear end of the protruding arm is attached by the pressing pin. Since the end is pushed out and the punching chips are pushed out from the punching blade by swinging the ejecting arm, it is not necessary to incorporate the mechanism for swinging the ejecting arm in the die cylinder and the processing for incorporating it. The die cylinder can be easily processed.

Further, by mounting the die board and the paired pin board at predetermined positions of the die cylinder and the pin cylinder, the pressing pin corresponds to the rear end of the protruding arm, so that the setup work by changing the punching work can be performed. It can be done efficiently in a short time.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a punching dust removing device according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing an operating state of the above.

FIG. 3 is a plan view of the punching blade portion of the above.

FIG. 4 is a cross-sectional view of the above-mentioned punching scrap removal state.

[Explanation of symbols]

 11 die cylinder 12 die board 13 punching blade 15 arm insertion hole 16 protruding arm 21 pin cylinder 22 pin board 23 pin holder 24 pressing pin

Claims (1)

[Scope of utility model registration request] 1. A die board is attached to the outer periphery of a die cylinder, an arm insertion hole is formed in an annular punching blade provided on the die board, and the tip end is inserted into the arm insertion hole so that the tip end faces the inside of the punching blade. In an apparatus for removing punching dust in a rotary die cutter, an arm is swingably attached to a die board, and the protruding arm is swung to push out punching dust remaining in a punching blade to the outside.
A pin board that swingably supports the central portion between both ends of the projecting arm and that rotates around the die cylinder at the same speed as the die cylinder is detachably attached to the outer periphery of the pin cylinder. A punching dust removing device in a rotary die cutter, wherein a pressing pin for pushing down a rear end portion of the protruding arm is provided in the.