JPH0521354Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for removing scraps generated during punching in a rotary die cutter that punches out products from cardboard sheets such as corrugated paper.

[Conventional technology]

Rotary die cutters for punching products from thick paper sheets such as corrugated paper are disclosed in, for example, Japanese Patent Application Laid-Open No. 59-227396, Japanese Patent Publication No. 59-20959,
Or Special Publication No. 58-20760, Actual Publication No. 58-
It is known from Publication No. 23598. FIG. 3 schematically shows this, and in the figure, 1 is a knife cylinder formed by attaching a punching die 3 to the outer peripheral surface of a rotary cylinder 2, and 4 is a knife cylinder arranged opposite to the knife cylinder 1. With anvil cylinder, both cylinders 1,
A cardboard sheet M is supplied between the punching die 3 and a punching blade 5 implanted on the surface of the punching die 3 to punch out a product in a predetermined shape. Thus, when a product is punched out from a cardboard sheet M using the rotary die cutter, for example, punching waste M' remains in the annular punching blade 5 at the part where a hole is punched out, and this waste M' is removed during the steady rotation of the knife cylinder 1. However, the means for this purpose is already known as shown in the figure. That is, the punching waste extracting device shown by the reference numeral 6 in the figure is one such device.
The punching waste removing device 6 includes a swing lever 7 located outside the punching blade 5 on the surface of the punching die 3.
The base end of the swing lever 7 is attached to a hinge 8 so that the swing lever 7 can swing freely within the plane in the rotational direction of the knife cylinder 1.
At the same time, the tip of the swinging lever 7 is made to face the internal space of the punching blade 5 through a notch hole 9 opened on one side thereof, and a flat plate-shaped extracting member 10 is fixed to the tip. Then, the push-up pin 12 is inserted into the hole 11 bored through the rotary cylinder 2 and the punching die 3 in the radial direction so as to be freely retractable from the punching die 3, and its rotation is inserted into the hollow interior of the knife cylinder 1. Cylinder 13 for pushing up to an eccentric position by shifting from the axis
The push-up pin 12 is brought into contact with the push-up cylinder 13, and when the knife cylinder 1 reaches a predetermined rotational position, the push-up pin 12 is pushed up by the push-up cylinder 13 and the surface of the punching die 3 is pushed up. The swinging lever 7 is pushed up by the push-up pin 12 that protrudes further, and the removable member 1 at the tip of the swinging lever 7 is pushed up.
0 is adapted to remove punching waste M' left in the punching blade 5.

[The problem that the idea attempts to solve]

In general, the knife cylinder 1 has a number of holes 11 formed at regular intervals along its axial and rotational directions, and the push-up pin 12 can be inserted into the holes 11 as appropriate. Since the required mounting position varies depending on the product, in some cases the hole 11 may not be located directly below the swing lever 7 and the push-up pin 12 may not be provided.
That is, since various punching dies 3 in which punching blades 5 are arranged according to the predetermined product shape are attached to the rotary cylinder 2, the rotary cylinder 2 is provided with a large number of holes 11 in advance, but still In some cases, since the hole 11 does not exist directly below the swing lever 7, the swing lever 7 cannot be pushed up with the push-up pin 12, and there is a problem that punching chips cannot be removed.
For this reason, in the past, the swing lever 7 had to be mounted diagonally within the outer circumferential surface of the knife cylinder 1 so that the push-up pin 12 was positioned below the swing lever 7, thereby pushing the swing lever 7 upward. However, in this case, the radius of curvature of the swinging lever 7 must be adjusted according to the angle of inclination of the swinging lever 7. If the swinging lever 7 is plate-shaped as shown in the figure, it should be curved into an arc shape. At the same time, there is also the problem that it is difficult to manufacture because it must be processed into a twisted shape.

[Means to solve the problem]

The present invention was devised to solve this problem, and includes an anvil cylinder parallel to and facing a knife cylinder with a punching die attached to its outer peripheral surface at a predetermined interval. An annular punching blade for punching the product is fixed, a notch hole is formed on one side of the annular punching blade, and a swinging lever is swingable within the same cross section of the knife cylinder. Its base end is attached to the surface of the punching die with a hinge, and the tip of the swinging lever faces the internal space of the punching blade through the notch hole, and a plate-shaped extraction member is attached to the tip. This is a device for extracting punching waste from a rotary die cutter, in which a push-up lever is inserted on the lower surface of the swing lever so as to be perpendicular to the swing lever and to be able to move away from and approach the punching die. On the other hand, a through-hole is bored at a position facing the lower surface of the push-up lever of the punching die, and the push-up pin, which is fitted into the knife cylinder so as to be freely retractable, is inserted into the through-hole at a predetermined rotational position of the knife cylinder. It is configured so that it protrudes from the top and pushes up the push-up lever.

[Effect]

When the knife cylinder reaches the predetermined rotational position,
The push-up pin protrudes from the through hole drilled in the punching die, immediately pushes up the push-up lever located on the top surface of the push-up pin, and rotates the swing lever located on the top surface of the push-up lever almost simultaneously to move the push-up pin into the punching blade. Remove the punching waste. Therefore, it is only necessary to provide the through-hole at a free position along the length of the push-up lever so as to face the bottom surface of the push-up lever, and there is no need to provide the through-hole on the bottom surface of the swing lever.

Further, since the swing lever does not need to match the position of the through hole, but swings within the same cross section of the knife cylinder, the mounting position of the punching blade can be changed on the surface of the punching die. If so, be sure to change the position of the hinges accordingly and install them so that they are both located within the same cross section. Therefore, the swing lever is not obliquely attached to the outer circumferential surface of the knife cylinder, but has a constant arc shape that curves within the plane in the direction of rotation of the knife cylinder, and does not need to be deformed.

〔Example〕

FIG. 1 and FIG. 2 show a punching waste removal device according to the present invention. A punching die 14 made of a plywood board curved into a dome shape is provided with a punching blade 15 in an annular shape. Reference numeral 16 denotes a swinging lever, which is formed in an arc shape along the outer peripheral surface of the punching die 14, and the base end of the swinging lever 16 is attached to the punching die 14 via a hinge 17. , a notch hole 1 formed in one side of the punching blade 15 at the tip of the swinging lever 16;
8 and faces into the annular space of the punching blade 15. Reference numeral 19 indicates a plate-shaped extractable member fixed to the top surface of the tip of the swing lever 16. Therefore, at a substantially intermediate position of the swing lever 16, an elongated plate-shaped push-up lever 2 is provided between the bottom surface of the swing lever 16 and the top surface of the punching die 14.
0 is interposed in a hole orthogonal to the swinging lever 16, and both ends of the push-up lever 20 in the longitudinal direction are loosely fitted into locking members 21, 21 each having a square shape attached to the punching die 14. Then, a through hole 22 is formed in the punching die 14 at a position facing the lower surface of the push-up lever 20, as shown in FIG. The through hole 22 is connected to the push-up lever 2.
Since it is only necessary to provide it so as to face the lower surface of the push-up lever 20, it can be provided at a free position along the length direction of the push-up lever 20 even if it is not directly below the swing lever 16. Therefore, the through hole 22 can be provided at a free position along the length of the push-up lever 20 so as to match the hole 11 previously formed in the knife cylinder 1. In other words, the push-up pin 12 does not necessarily have to be positioned directly below the swing lever 16, so the swing lever 16 can be provided in accordance with the required setting position of the punching blade 15.

In addition, when changing the required mounting position of the punching die 14 depending on the product, the mounting position of the hinge 17 of the swinging lever 16 is also changed in the same way, so that the swinging lever 16 swings within the same cross section of the knife cylinder 1. Be free. As a result, the swing lever 16 is moved to the push-up lever 20.
The swinging lever 16 can be formed into a constant circular arc curved in the plane of the rotation direction of the knife cylinder 1.

The rotary type die cutter punching waste removal device configured in this manner is attached to the knife cylinder 1, and when the knife cylinder 1 is rotated, the push-up pin 12 opens the hole 11 by the push-up cylinder 13 at a predetermined rotational position. It is pushed up through the punching die 14 and protrudes from the through hole 22 provided in the punching die 14. Along with this, the push-up lever 20 is separated from the punching die 14,
Therefore, the swinging lever 16 that comes into contact with the push-up lever 20 rotates about the hinge 17, and the punching blade 1
The punching waste M' left in the hole 5 is removed.

[Effect of idea]

As described above, according to the rotary die cutter punching waste removal device of the present invention, a push-up lever is inserted perpendicularly to the swing lever, and the push-up pin is inserted through the through hole at a predetermined rotational position of the knife cylinder. Since the structure is such that the swing lever is rotated via the push-up lever by protruding, the swing lever can be moved even if the position of the swing lever is changed in accordance with the change in the required mounting position of the punching blade.
There is an advantage that the punching waste can be removed by the action of the push-up lever regardless of the position of the push-up pin hole or through-hole.

In addition, since it is not necessary to provide a hole for a push-up pin on the lower surface of the swing lever, the position of the hinge can be changed to the left or right in accordance with the change in the mounting position of the punching blade.
It is sufficient to always swing within the same cross section of the knife cylinder. For this reason, the swing lever may be curved in the plane of the rotational direction of the knife cylinder and always have a constant arc shape, and as in the conventional case, the swing lever is twisted into a three-dimensional curved shape by aligning it with the hole position. There is no trouble, and there are effects such as the fact that the manufacturing labor can be greatly reduced when manufacturing punched shapes for a wide variety of products.

[Brief explanation of drawings]

The drawings show an embodiment of the rotary type die cutter punching waste extraction device of the present invention. Figure 1 is an external perspective view, Figure 2 is a vertical cross-sectional view, and Figure 3 is a cross-sectional view of the conventional device. It is a front view. 1... Knife cylinder, 4... Anvil cylinder, 12... Push-up pin, 14... Punching die, 15...
...Punching blade, 16...Swinging lever, 17...Hinge,
18... Notch hole, 19... Removal member, 20...
Push-up lever, 22...through hole.

Claims (1)

[Scope of utility model registration request] An anvil cylinder is provided parallel to and at a predetermined interval from a knife cylinder with a punching die attached to its outer circumferential surface, and an annular punching blade for punching a product of a predetermined shape is fixed on the surface of the punching die. A notch hole is formed in one side of the punching blade, and the base end of the rocking lever is attached to the surface of the punching mold with a hinge so that it can swing freely within the same cross section of the knife cylinder. , a rotary type die cutter punching waste extraction device in which the tip of the swing lever faces the internal space of the punching blade through the notch hole, and a plate-shaped extraction member is attached to the tip of the swing lever; , while inserting a push-up lever on the lower surface side of the swinging lever so as to be perpendicular to the swinging lever and so as to be able to move away from and approach the punching die;
A through-hole is formed at a position facing the lower surface of the push-up lever of the punching die, and a push-up pin that is removably inserted into the knife cylinder protrudes from the through-hole at a predetermined rotational position of the knife cylinder and is pushed. A rotary die cutter punching waste removal device characterized by being configured to push up a lifting lever.