JPH11207700A - Blade receiving plate in rotary sheet punching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and elastically deform a metallic plate along the outer periphery of an anvil cylinder by forming a plurality of punch holes in the remaining part except a location opposed to a sheet punching edge of the metallic plate. SOLUTION: Because a metallic plate 8 is extremely difficult to elastically deform when thickness of the metallic plate 8 is about 1 mm when a edge bearing plate 7 is mounted and a contact angle with an anvil cylinder becomes small by elasticity of the metallic plate 8 itself, a case where a sheet can not be accurately punched is generated. Therefore, punch holes 24 are formed in the remaining part except a location opposed to a punching blade and crease of the metallic plate 8. When the punch holes 24 are provided at the location opposed to the punching blade and crease at this stage, the punching and creasing of the sheet become incomplete. As a result, the metallic plate 8 can be easily and elastically deformed along the outer periphery of the anvil cylinder, even if the plate 8 is thick, and a setting work of the edge bearing plate 7 can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade receiving plate in a rotary sheet punching device for punching a sheet such as a cardboard into a predetermined shape.

[0002]

2. Description of the Related Art A sheet such as a corrugated cardboard fed between two cylinders is punched into a predetermined shape by a punching blade of a sheet punching type mounted on the outer periphery of a die cylinder while rotating in a reverse direction relative to a die cylinder and an anvil cylinder. 2. Description of the Related Art Rotary sheet punching apparatuses are conventionally known.

[0003] The above-mentioned sheet punching device includes a soft type in which a blade of a sheet-punching type punching blade is cut into an elastic layer provided on the outer periphery of the anvil cylinder to punch out a sheet, and the above-mentioned blade is applied to the outer periphery of the anvil cylinder. There is a hard type in which a sheet is punched by contact.

In a hard-type sheet punching apparatus, if the cutting edge of the punching blade is brought into direct contact with the outer circumference of the anvil cylinder, the outer circumference of the anvil cylinder is easily damaged. Must be replaced, which is disadvantageous in terms of cost.

For this reason, in the hard type sheet punching apparatus, a hard blade receiving plate made of a stainless steel plate or the like is attached to the outer periphery of the anvil cylinder, and the blade edge of the punching blade is brought into contact with the blade receiving plate, so that the sheet is damaged. When the punching accuracy decreases, only the blade receiving plate is replaced with a new one.

The blade receiving plate has a flat shape in its natural state, and the flat plate receiving plate is elastically deformed along the outer periphery of the anvil cylinder to fix both ends.

In mounting the blade receiving plate as described above, if the portion of the blade receiving plate that receives the cutting edge of the punching blade is separated from the outer periphery of the anvil cylinder,
When receiving the blade edge of the punching blade, the blade receiving plate is elastically deformed and cannot cut the sheet reliably. Therefore, it is necessary to attach at least a portion of the punching blade that receives the blade edge to closely contact the outer periphery of the anvil cylinder.

[0008]

When the blade receiving plate is thin, it can be easily elastically deformed along the outer periphery of the anvil cylinder, so that the blade receiving plate can be easily mounted. Since the blade receiving plate is easily deformed and damaged by an impact when receiving the blade edge, it is preferable to use a blade receiving plate having a thickness of about 1 mm.

However, in the case of a thick blade receiving plate, it is difficult to elastically deform the blade receiving plate along the outer periphery of the anvil cylinder. Dots are left.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blade receiving plate in a simple rotary sheet punching device which can be easily elastically deformed along the outer periphery of an anvil cylinder.

[0011]

In order to solve the above-mentioned problems, the present invention comprises a hard elastic metal plate attached along the outer periphery of an anvil cylinder. In a blade receiving plate of a rotary type sheet punching device for receiving a cutting edge of a punching type sheet punching blade attached to a cylinder and punching a sheet fed between the two cylinders into a predetermined shape, the blade receiving plate faces the sheet punching blade of the metal plate. A configuration in which a plurality of holes are formed in the remaining portion excluding the position is adopted.

Here, the punched hole is provided uniformly over the entire remaining portion except for the position facing the punching blade so that the metal plate can be more easily elastically deformed along the outer periphery of the anvil cylinder. It is preferable to keep it. Any shape such as a circle, an oval, and an ellipse can be adopted as the shape of the punched hole.

Further, a stainless steel plate can be used as the metal plate.

As described above, if the metal plate is formed with the holes, even if the metal plate is thick, the metal plate can be easily elastically deformed, and the attachment to the outer periphery of the anvil cylinder is facilitated. And a good attachment state in close contact with the outer periphery of the anvil cylinder can be obtained.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a rotary sheet punching apparatus. This sheet punching device includes a die cylinder 1,
An anvil cylinder 2 is provided in parallel with the die cylinder 1, and a punching die 3 is attached to the outer periphery of the die cylinder 1.

The punching die 3 includes a punching blade 5 for punching a sheet of corrugated cardboard or the like into a predetermined shape on an arc-shaped die board 4 detachably attached to the outer periphery of the die cylinder 1 through means such as bolts. The sheet is provided with a ruled line 6 for inserting a ruled line for bending.

A blade receiving plate 7 is mounted on the outer periphery of the anvil cylinder 2 at a position facing the punching die 3.

The die cylinder 1 and the anvil cylinder 2 are rotated in opposite directions as shown by arrows in FIG.
Is punched into a predetermined shape by the contact of the cutting edge of the punching blade 5 with the blade receiving plate 7, and a ruled line is formed by pushing the ruled line 6.

When it is necessary to make a ruled line on both the front and back surfaces of the sheet S, a rule is also attached to the blade receiving plate 7.

The blade receiving plate 7 is made of a hard elastic metal plate 8 such as a stainless steel plate. As shown in FIG.
A plurality of pin holes 9 and a plurality of bolt insertion holes 10 are formed at one end of the metal plate 8, and a plurality of engagement holes 11 are provided at a required interval at the other end.

The blade receiving plate 7 is shown in FIGS.
As shown in (1), one end is fixed by a pin plate 12 attached to the outer periphery of the anvil cylinder 2 and a holding plate 13.

The pin plate 12 is provided with the anvil cylinder 2
Is fixed to the anvil cylinder 2 by tightening a plurality of bolts 14 screwed into the cylinder. The pin plate 12 is provided with a plurality of engaging pins 15 and a plurality of screw holes 16, and a pin hole 9 provided at one end of the metal plate 8 faces the engaging pin 15, Bolt insertion hole 10
Is opposed to the screw hole 16.

On the other hand, a pin hole 17 is formed in the holding plate 13 at a position facing each of the engagement pins 15, and a bolt insertion hole 18 is provided at a position facing each of the screw holes 16. . Also, the holding plate 13
Are formed with engagement grooves 19 extending in both end directions.

One end of the blade receiving plate 7 is superimposed on the pin plate 12 so that the engaging pin 15 fits into the pin hole 9, and the pressing plate 13 is superimposed thereon. Bolt insertion hole 1
One end of the blade receiving plate 7 is fixed by tightening the set bolt 20 screwed into the screw hole 16 of the pin plate 12 from 8.

The blade receiving plate 7 is deformed along the outer periphery of the anvil cylinder 2 after one end thereof is fixed, and the hook 22 at one end of the elastic band 21 is engaged with the engaging hole 11 provided at the other end. The elastic band 21 is stretched along the outer periphery of the anvil cylinder 2, and the other end of the blade receiving plate 7 is fixed by the engagement of the hook 23 provided on the other end and the engaging groove 19 provided on the holding plate 13. Is done.

In mounting the blade receiving plate 7 as described above, the blade receiving plate 7 is fixed at one end and then elastically deformed along the outer periphery of the anvil cylinder 2.
If the metal plate 8 forming the blade receiving plate 7 has a thickness of about 1 mm, it is very difficult to elastically deform the metal plate 8 and both ends of the metal plate 8 are tangential to the outer circumference of the anvil cylinder 2 due to its own elasticity. And the contact angle with the anvil cylinder 2 is reduced.

For this reason, if the length of the blade receiving plate 7 is substantially equal to the circumferential length of the punching die 3, the circumferential contact length of the blade receiving plate 7 with the anvil cylinder 2 (the anvil cylinder 2 The circumferential length of the portion closely contacting the outer periphery of the punching die 3 is shorter than the circumferential length of the punching die 3, and the cutting edge of the punching blade 5 of the punching die 3 comes into contact with the raised portions at both circumferential ends of the blade receiving plate 7. In some cases, the sheet S cannot be accurately punched.

On the other hand, if a sufficient contact length with the outer periphery of the anvil cylinder 2 is to be ensured, a long blade receiving plate 7 is required, which causes a problem in economy.

In order to solve such a problem, a plurality of holes 24 are formed in the metal plate 8. Here, if the punching hole 24 is provided at a position facing the punching blade 5 and the crease 6 of the punching die 3, the punching and scoring of the sheet S will be incomplete, so that the punching blade 5 and the crease 6 are not provided. The above-mentioned hole 24 is formed in the remaining part except the position where it faces. The chain line (a) in FIG. 2 shows the facing position of the punching blade 5 and the rule 6.

The hole 24 may have any shape, such as a circle or an ellipse, as well as an oval as shown.

By forming the holes 24 in the metal plate 8 as described above, even if the metal plate 8 is thick, it can be easily elastically deformed along the outer periphery of the anvil cylinder 2. The work of setting the blade receiving plate 7 can be facilitated.

Further, a sufficient contact length in the circumferential direction with respect to the outer periphery of the anvil cylinder 2 can be ensured, so that it is not necessary to use a metal plate 8 having a longer length than necessary, thereby improving the economy. it can.

[0034]

As described above, according to the present invention, since the cutout hole is formed in the blade receiving plate formed of a hard metal plate having elasticity such as stainless steel, the blade receiving plate is attached to the outer periphery of the anvil cylinder. It can be easily elastically deformed along the outer periphery of the anvil cylinder, and the workability at the time of mounting the blade receiving plate can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a sheet punching apparatus using a blade receiving plate according to the present invention.

FIG. 2 is a perspective view of the blade receiving plate according to the first embodiment;

FIGS. 3 (I) and (II) are enlarged sectional views showing a fixed portion at one end of the blade receiving plate, and (III) is an enlarged sectional view of the other end of the blade receiving plate.

FIG. 4 is an exploded perspective view of the above.

[Explanation of symbols]

 Reference Signs List 1 die cylinder 2 anvil cylinder 3 punching die 5 punching blade 7 blade receiving plate 8 metal plate 24 punching hole

Claims (2)

[Claims] The present invention comprises a hard elastic metal plate attached along the outer periphery of an anvil cylinder, and the metal plate receives the cutting edge of a punching-type sheet punching blade attached to the outer periphery of a die cylinder, and is provided between the two cylinders. In a blade receiving plate in a rotary sheet punching device that punches a sheet fed into a predetermined shape, a plurality of punched holes are formed in a remaining portion of the metal plate except for a position facing a sheet punching blade. Receiving plate in a rotary sheet punching device. 2. The blade receiving plate according to claim 1, wherein the metal plate is made of a stainless steel plate.