JPH0574800U - Rotary die cutter - Google Patents

Abstract

(57) [Summary] [Purpose] In a rotary die cutter for punching a liner made of non-woven fabric into a predetermined shape, the punched product is reliably separated from the liner. [Structure] An anvil cylinder 2 having a die cylinder 10 to which a knife plate 11 is attached and a product suction portion 21.
On the outlet side of the liner A between 0, a pressing member 41 for pressing the punched product is swingably provided. A tension roller 63 that pulls the liner A to apply tension to the liner A from the pressing member 41 is provided. The liner A is punched by the rotation of the die cylinder 10 and the anvil cylinder 20, the punched product is pressed against the outer periphery of the anvil cylinder 20 by the pressing member 41, and the liner A is moved by the movement of the tension roller 63 in the pressed state.
Tension is applied to the punched product a and the liner A to move relatively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary die cutter for punching a liner made of non-woven fabric into a predetermined shape.

[0002]

[Prior Art]

 Generally, in a 3.5-inch floppy disk, as shown in FIG. 5, a protective sheet 2 made of a non-woven fabric is attached to the inner surface of a hard case 1 to protect the recording medium 3 incorporated in the case 1 for recording. The medium 3 is prevented from being scratched.

A rotary die cutter is used to form the protective sheet 2. The rotary die cutter is of the hard type that punches the liner inserted between both cylinders by bringing the punching blade of the knife plate mounted on the outside of the die cylinder into contact with the outer circumference of the anvil cylinder. There is a soft type in which the cutting edge of the punching blade is cut into an elastic body attached to the outer periphery of the anvil cylinder to punch the liner. A hard type rotary die cutter is usually used for punching a product whose liner is made of a non-woven fabric.

[0004]

[Problems to be solved by the device]

 By the way, the protective sheet 2 for protecting the recording medium 3 is a non-woven fabric in which thin fibers having flexibility are layered. When such a non-woven fabric is punched by a rotary die cutter, the fibers are not reliably cut and It was often excreted in a state in which the fiber and the liner were connected.

The present invention aims to solve the above-mentioned inconvenience and to reliably separate the punched product from the liner.

[0006]

In order to solve the above problems, in the present invention, a liner made of non-woven fabric is inserted between a die cylinder and an anvil cylinder having a product suction portion, and both cylinders are reversed. In a rotary die cutter in which the liner is punched into a specified shape with a knife plate punching blade attached to the outside of the die cylinder by rotating it intermittently in the direction of When stopped, the pressing member swings toward the outer circumference of the anvil cylinder and presses the punched product against the outer circumference of the anvil cylinder. It adopted a structure that provided with an attachment mechanism.

[0007]

[Action]

 In the rotary die cutter with the above configuration, when the product is punched by the rotation of the die cylinder and the anvil cylinder, the pressing member swings toward the anvil cylinder, and the punched product is pressed against the anvil cylinder by the holding member. When the liner and the punched product are connected by a fiber, the tensioning mechanism operates and the liner and the punched product are connected to each other by the relative movement of the two to tear off the fiber and separate the punched product from the liner. Let

[0008]

【Example】

 An embodiment of this invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, a knife plate 11 is attached to the outside of the die cylinder 10, and a plurality of punching blades 12 are provided on the knife plate 11 at equal intervals in the circumferential direction. An elastic body 13 for extruding the product is provided inside the punching blade 12.

The die cylinder 10 and the anvil cylinder 20 provided below the die cylinder 10 are intermittently rotated in the direction of the arrow in FIG. 1 with an angle corresponding to the pitch of the punching blades 12 as a rotation angle. The anvil cylinder 20 is provided with a suction portion 21 composed of a plurality of suction holes at a position facing the punching blade 12. The suction force is applied to the suction portion 21 within the range of the angle α.

The liner A made of a non-woven fabric is inserted between the anvil cylinder 20 and the die cylinder 10 along the upper periphery of the anvil cylinder 20, and a pressing roller 30 is provided on the liner inlet side between the cylinders 10 and 20. There is.

The pressing roller 30 is rotatably supported by a tip end portion of a roller arm 31, while the roller arm 31 is swingably supported about a pin 32. The presser roller 30 is swung with respect to the anvil cylinder 20 by the operation of the cylinder 33 connected to the roller arm 31, and when swinging toward the anvil cylinder 20, the liner A is held by the anvil cylinder 20. Prevent liner A from moving.

At the liner outlet side of the die cylinder 10 and the anvil cylinder 20, a rotary shaft 40 is provided on the transfer path of the liner A, which is long in the direction intersecting with the transfer direction of the liner A.

Both ends of the rotary shaft 40 are rotatably supported, and a pressing member 41 for pressing the punched product against the outer periphery of the anvil cylinder 20 is attached to the center of the rotary shaft 40. As shown in FIG. 3, a lever 42 is fixed to one end of the rotary shaft 40, and a cylinder 43 is connected to the lever 42. The cylinder 43 operates when the die cylinder 10 and the anvil cylinder 20 stop rotating to rotate the rotary shaft 40 and swing the pressing member 41 toward the outer periphery of the anvil cylinder 20.

On the liner outlet side of the pressing member 41, as shown in FIG. 1, a pair of nip members 50 and 51 for holding the liner A from above and below, and a tension applying mechanism 60 for applying tension to the liner A. And are provided in order.

Of the pair of nip members 50 and 51, the outer peripheral upper surface of the lower nip member 51 is a cylindrical surface 52. On the other hand, the upper nip member 50 is composed of rollers. The upper nip member 50 is brought into contact with and separated from the lower nip member 51 by a driving device (not shown).

In the tension applying mechanism 60, a tension roller 63 that guides the movement of the liner A is rotatably attached to the tip of a roller arm 62 that is swingably supported around a pin 61, and the roller arm 62 is provided. A spring 64 is connected to the tension roller 63 to move the tension roller 63 to the tension side of the liner A.

The liner A applied to the tension roller 63 is set by the guide roller 70 and wound on the reel 80.

Here, the reel 80 turns on / off the winding depending on the swing range of the roller arm 62, and applies a constant tension to the liner A.

The rotary die cutter shown in the embodiment has the above structure, and when the operation is started in a state where the liner A is inserted between the die cylinder 10 and the anvil cylinder 20, the die cylinder 10 and the anvil cylinder 20 are separated from each other. Rotate intermittently. At this time, the liner is adsorbed by the adsorbing part 21 located on the liner inlet side of the anvil cylinder 20, the liner A is conveyed in one direction by the rotation of the anvil cylinder 20, and the liner A is punched by the punching blade 12 of the die cylinder 10. Punched into the shape of. The punched product a is suction-supported by the suction unit 21.

At the time of punching the liner A as described above, as shown in FIG. 4A, the nip members 50 and 51 are in a state of holding the liner A, while the tension roller 63 is pulled down. Is in a state. Therefore, the liner A conveyed by the rotation of the anvil cylinder 20 has a slack between the anvil cylinder 20 and the nip members 50 and 51.

When the punching blade 12 punches the liner A and the die cylinder 10 and the anvil cylinder 20 stop, the cylinder 43 operates to swing the pressing member 41 toward the anvil cylinder 20.

As shown in FIG. 4B, when the pressing member 41 presses the punched product a against the anvil cylinder 20, the pressing roller 30 swings toward the anvil cylinder 20 and presses the liner A, Almost at the same time as the pressing, the upper nip member 50 moves upward to release the pinching of the liner A.

At this time, the tension roller 63 is held in the lowered position, and at the same time the nip members 50 and 51 release the holding of the liner A, the tension roller 63 is instantly pulled up by the elasticity of the spring 64. Therefore, tension is applied to the liner A as shown in FIG. 4C, and the liner A moves with respect to the punched product a.

Therefore, when the punched product a and the liner A are connected by incompletely cut fibers, the fibers are torn off by the relative movement of the product a and the liner A, and the punched product a is removed from the liner A. Completely separate.

When the tension roller 63 rises and a certain tension is applied to the liner A, the pressing member 41 swings upward to release the pressing, while the pressing roller 30 also separates from the anvil cylinder 20. Release the holding of liner A.

Further, the upper nip member 50 descends to hold the liner A, and at the same time, the winding reel 80 rotates to wind the liner A, the tension roller 63 is pulled down by the winding, and the spring 64 is elastic. Is given.

The punched product a is conveyed in the circumferential direction by the rotation of the anvil cylinder 20 while being adsorbed by the suction part 21, and when it is conveyed to the lower part of the outer periphery of the anvil cylinder 20, it is released by suction to the suction part 21 to move downward. Is discharged to.

[0029]

[Effect of the device]

 As described above, in the rotary die cutter according to the present invention, the punched product adsorbed on the outer periphery of the anvil cylinder is pressed by the pressing member, and in the pressed state, the liner is punched by applying tension to the liner. The relative movement allows the punched product to be reliably separated from the liner.

[Brief description of drawings]

FIG. 1 is a schematic view of a rotary die cutter according to the present invention.

FIG. 2 is a sectional view of the same die cylinder and anvil cylinder.

FIG. 3 is a perspective view showing the main part of the same.

4 (a), (b), and (c) are diagrams showing the punched state of the product in stages.

FIG. 5 is a partially cutaway perspective view of a floppy disk.

[Explanation of symbols]

 10 Die Cylinder 11 Knife Plate 12 Punching Blade 20 Anvil Cylinder 21 Adsorption Part 41 Pressing Member 60 Tensioning Mechanism

Claims (1)

[Scope of utility model registration request] 1. A punching blade of a knife plate mounted on the outside of a die cylinder by inserting a liner made of non-woven fabric between the die cylinder and an anvil cylinder having a product suction portion, and intermittently rotating both cylinders in opposite directions. In a rotary die cutter that punches the liner into a predetermined shape with, on the liner outlet side between the two cylinders,
When both cylinders are stopped, it swings toward the outer circumference of the anvil cylinder and presses the punched product against the outer circumference of the anvil cylinder.The pressing member presses the punched product and then pulls the liner to apply tension to the liner. A rotary die cutter, which is provided with a tension applying mechanism for applying.