JPH07108411B2 - Knife processing dies - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long thin plate-shaped sheet processing knife used for punching a sheet of paper, plastic, corrugated cardboard or the like into a predetermined shape by punching press working or for making a crease in the sheet. The present invention relates to a knife processing die used when a (knife) is bent into this predetermined shape.

[0002]

BACKGROUND OF THE INVENTION As shown in FIG. 10, for example, a knife A of this type is thin (for example, wall thickness dimension 0.4 to 1.0 mm), strip-shaped, has a cutting edge 1, and has a substantially rectangular cross section. Is formed in. The knife A is used by being fitted and fixed in the knife fitting groove 3 which is formed through the wooden knife holder 2 continuously. The knife fitting groove 3 is formed in advance into a predetermined shape (shape corresponding to a punching die) by, for example, laser processing. On the other hand, the knife A is placed with its back portion 6 side along a surface plate (not shown), and is bent by being clamped by a pair of bending dies from both side surfaces of the knife A. Then, a predetermined bent portion 5 is formed.
However, in the apparatus for bending the knife A as described above, since the parallelism of the pinching portion in the bending die with respect to the knife side portion is poor, the knife A is bent at an accurate bending angle with respect to the back portion 6. There was a problem that it could not be processed so that Therefore, the present invention is
The present invention has been made in view of the above circumstances, and an object thereof is to provide a processing die having a structure capable of processing the knife so that the bending angle is accurate with respect to the back of the knife.

[0003]

In order to achieve the above-mentioned object, the main means adopted by the present invention is, as its gist, that it acts on the side portion of a long thin plate-shaped knife and bends the knife. In the processing die of the knife to apply,
A die for processing a knife according to claim 1, wherein a hollow groove having an edge portion which is parallel to both side portions of the knife when the knife is penetrated through an appropriate gap is integrally formed.

[0004]

In the processing die having the above structure, the hollow groove is integrally formed, so that the edge portion of the hollow groove is parallel to the side portion of the knife. As a result, the knife can be bent while ensuring an accurate angle without causing a problem such as warping of the knife.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. The following embodiments are examples of embodying the present invention and are not intended to limit the technical scope of the present invention. FIG. 1 is a side view of a bending machine equipped with a working die according to an embodiment of the present invention, FIG. 2 is a plan view of the bending machine, and FIG. 3 is a front view of the bending machine. 4 is shown in FIG.
5 is an enlarged view of an arrow B in FIG. 5, FIG. 5 shows the processing die, (A) is a perspective view, (B) is a front view,
(C) is a plan view, (D) is a side view, (E) is an enlarged cross-sectional view of an essential part of (C), FIG. 6 shows a base for holding the above-mentioned processing die, and (A) is Front view, (B)
Is a plan view, (C) is a side view, FIG. 7 is a knife processing die according to another embodiment, (A) is a front view, (B) is a C-C in (A). ′ View in cross section,
8C is a side view, FIG. 8 is a perspective view of a pressing roller device that constitutes the bending apparatus, FIG. 9 is a detailed structure of the pressing roller device, and FIG. B)
Is a front view. As shown in FIGS. 1 to 4, the bending apparatus equipped with the processing die according to this embodiment has a knife A.
Support 6 for slidably supporting the knife A from both sides of the back 6 (one end in the longitudinal direction) along the upper surface of the surface plate 7, and the knife A on the upper surface of the surface plate 7. Urging mechanism 9 for urging the knuckle 9 and the knife A, which is disposed adjacent to the support mechanism 8 with a predetermined gap t (see FIG. 4) and is supported by the support mechanism 8 repeatedly. It comprises a bending mechanism 10 for applying a force, and a delivery mechanism 11 for delivering the knife A from the support mechanism 8 each time the bending process by the bending mechanism 10 is performed. The support mechanism 8 includes a block 12 having a through groove for allowing the knife A to penetrate therethrough, and by appropriately replacing the spacer 13 attached to the front surface of the block 12, The size of the gap t between them is adjusted. As shown in FIGS. 8 and 9, the urging mechanism 9 is constituted by a pressing roller device which is arranged so as to face the upper surface of the surface plate 7 and presses the knife A toward the upper surface of the surface plate 7. Has been done.

In this pressing roller device, a support groove 15 for supporting the taper surface by inserting the cutting edge 1 of the knife A into the peripheral surface of a roller 15 rotatably supported by a shaft 14 is provided.
a is engraved endlessly, and the roller 15 is supported by a support shaft 16 so as to be swingable with respect to the upper surface of the surface plate 7, and is an example of a biasing means toward the upper surface. It is elastically biased by a certain spring 17. That is, the long hole 18 is formed in the longitudinal direction of the bracket 18 that supports the roller 15.
a is penetratingly formed, and the support shaft 16 attached to the bracket 19 is slidably fitted in the long hole 18a. The bracket 19 is a lever 2 for operation.
0, which is slidably supported in the same direction as the longitudinal direction of the long hole 18a of the bracket 18 by a bracket 21 attached to the body of the bending apparatus. The spring 17 is interposed between the bracket 21 and a position corresponding to an intermediate portion of the elongated hole 18 a in the longitudinal direction of the bracket 18. Therefore, in the pressing roller device having the above configuration, when the operator grips the lever 20 and operates it in the direction of arrow 22a, for example, the support shaft 16 moves to the position indicated by the broken line in FIG. The elastic biasing force of the spring 17 biases the surface plate 7 toward the upper surface. On the other hand, when the lever 20 is operated to move in the direction of the arrow 22b,
The supporting shaft 16 moves to the position shown by the solid line in the figure, and the roller 15 is urged to swing upward by the action of the spring 17. The swing position in this case is regulated by the stopper 23. That is, this pressing roller device appropriately changes the biasing direction of the roller 15 with respect to the upper surface of the surface plate 7 by making the position of the support shaft 16 relatively variable with respect to the biasing position of the spring 17. It is configured to be selectively switchable. Therefore, in this pressing roller device, the knife A can be reliably held on the surface plate 7 without damaging the cutting edge 1 of the knife A, and even if the height dimension of the knife A changes, this Appropriate measures can be taken. Furthermore, by simply operating the lever 20 in the front-back direction, the knife A can be very easily
The holding state and the releasing state can be switched.

The bending mechanism 10 acts on a side portion of the knife A to bend the knife A, and the processing die 2 is used.
4 (see FIG. 5). The processing die 24 is integrally formed of a thin plate member, and the substantially central portion thereof is parallel to both side portions of the knife A when the knife A is penetrated through it with a proper gap. A hollow groove 24b having an edge portion 24a is formed integrally by, for example, wire cutting. And this edge part 2
Hardening treatment is applied to 4a. In this case, the above-mentioned appropriate gap means an operation for bringing the edge portion 24a into contact with only one side portion of the knife A when the processing die 24 is vibrated as described later. This is an acceptable size. On the front side of the processing die 24, in order to facilitate the passage of the knife A after being bent, an arcuate peripheral surface 24 having a radius of curvature R is formed.
c is engraved. The processing die 24 configured as described above is detachably fitted into a base 25 (see FIG. 6) corresponding to a holder, and is held by screws at its upper and lower positions. The lower end of the base 25 is slidably supported by a slide bearing 26 in a direction (arrows 28a and 28b) perpendicular to the feeding direction of the knife A (arrow 27 direction). Then, the base 25, together with the processing die 24, is vibrated in the bending direction of the knife A by a motor 30 via a crank 29. In this case, the processing die 24 falls over the upper surface of the surface plate 7 (the arrow 27 above the processing die 24).
Support member 3 in which the upper portion of the base 25 is formed in a substantially L shape in order to prevent the (tilt in the direction) and ensure the squareness.
It is slidably supported in the left-right direction by its L-shaped tip portion of 1.

[0008] The processing die 2 having the above structure
In FIG. 4, since the hollow groove 24b is integrally formed as described above, the parallelism of the edge portion 24a with respect to the side portion of the knife A is ensured, and the knife A is accurately bent without causing a problem such as a warp. Bending can be performed while ensuring a right squareness. In addition, the processing die 24
Since it is formed thin as described above, the knife A
However, it is possible to perform bending with a relatively small radius of curvature. Incidentally, in the base 25 according to this embodiment, as shown in FIG. 6, the degree of tilting of the processing die 24 in the left-right direction (arrow 28a with respect to the upper surface of the surface plate 7) is provided above the holding position of the processing die 24. , Screws 37, 38 for finely adjusting the inclination angle in the 28b direction) are screwed. By adjusting these screws 37 and 38 appropriately, the processing die 24 is inclined with respect to the surface plate 7, and in this state, the knife A
When a bending process is performed on the knife A, a component force is applied to the knife A in the direction of pushing it down toward the upper surface of the surface plate 7. As a result, the bending process can be performed under a state where the back portion 6 of the knife A is always along the upper surface of the surface plate 7. FIG. 7 shows a processing die 24 'according to another embodiment. In this processing die 24 ', notches 24d, 24d are formed on both sides of the edge 24a with the edge 24a interposed therebetween. By providing the cutout portion 24d in this manner, the knife A after bending is formed.
The tip portion of the knife A can be inserted into the cutout portion 24d, and the knife A can be bent back.

In the delivery mechanism 11, a plurality of rollers 32a, 32b, 33a, 33b, 3 are provided so that the knife A can be sandwiched from both sides thereof and delivered in the direction of arrow 27.
4a, 34b. Each of these rollers has an interlocking mechanism 3 including a plurality of belts and pulleys.
The motor 36 is synchronously driven via the motor 5. The inner rollers 32b and 33b are supported so that their positions can be changed in accordance with the thickness of the knife, and are constantly elastically urged in the direction of arrow 28b by a spring. The motor 36 is controlled synchronously with the motor 30. In the bending apparatus configured as described above, the knife A is held by the support mechanism 8 and the biasing mechanism 9 with the upper surface of the surface plate 7 as a reference. The bending mechanism 10 bends the knife A thus held. That is, the hollow groove 24b of the processing die 24 is formed on the side surface of the knife opposite to the direction in which the knife A is bent.
The base 25 is vibrated and driven by the motor 30 so that the edge portion 24a of the base 25 contacts. In this case, since the edge portion 24a whose parallelism is ensured with respect to the side portion of the knife A is oscillated and driven in a state of being erected perpendicularly to the surface plate 7, the knife A has an accurate squareness. It can be bent while securing. Then, each time the bending process is performed, the knife A is sent out from the support mechanism 8 by the sending mechanism 11.
It can be bent with a predetermined radius of curvature. According to such a procedure, the elongation of the knife material due to the plastic deformation during processing is suitably absorbed in the bent portion, and the knife A is
It is processed into an accurate bending angle with the upper surface of the surface plate 7 as a reference without being sheared. In the bending apparatus having the above structure, the gap A formed between the block 12 forming the support mechanism 8 and the processing die 24 forming the bending mechanism 10 is set to 0, so that the knife A Can be sheared with a predetermined dimension at an accurate right angle.

[0010]

As described above, according to the present invention, in a knife processing die that acts on the side of a long thin plate-like knife and bends the knife, the knife is provided with an appropriate gap. Since it is a die for machining a knife, which is integrally formed with a hollow groove having an edge portion that is parallel to both side portions of the knife when penetrated through the knife, problems such as warping of the knife occur. It is possible to perform bending while ensuring an accurate angle without doing so.

[Brief description of drawings]

FIG. 1 is a side view of a bending apparatus including a processing die according to an embodiment of the present invention.

FIG. 2 is a plan view of the bending apparatus.

FIG. 3 is a front view of the bending apparatus.

FIG. 4 is an enlarged view of an arrow B portion in FIG.

FIG. 5 shows the above processing die,
(A) is a perspective view, (B) is a front view, (C) is a plan view,
(D) is a side view, (E) is an enlarged cross-sectional view of a main part in (C).

6A and 6B are views showing a base for holding the processing die, where FIG. 6A is a front view, FIG. 6B is a plan view, and FIG.
Is a side view.

7A and 7B show a die for processing a knife according to another embodiment, wherein FIG. 7A is a front view, FIG. 7B is a sectional view taken along the line CC ′ in FIG. 7A, and FIG. Side view.

FIG. 8 is a perspective view of a pressing roller device that constitutes the bending device.

9A and 9B show a detailed structure of the pressing roller device, FIG. 9A being a side view and FIG. 9B being a front view.

FIG. 10 is a perspective view for explaining the background art of the present invention and showing a state before a knife is attached to the knife holder.

[Explanation of Codes] 1 ... Blade 6 ... Back 7 ... Surface plate 8 ... Support mechanism 9 ... Energizing mechanism 10 ... Bending mechanism 11 ... Sending mechanism 12 ... Block 13 ... Spacer 14 ... Shaft 15 ... Roller 15a ... Support groove 16 ... Support shaft 17 ... Spring 18, 19, 21 ... Bracket 18a ... Long hole 20 ... Lever 24, 24 '... Machining die 24a ... Edge part 24b ... Hollow groove 25 ... Base 26 ... Slide bearing 29 ... Crank 30, 36 ... Motor 32a, 32b, 33a, 33b, 34a, 34b ... Roller 35 ... Interlocking mechanism A ... Knife

Claims (1)

[Claims] 1. A device which acts on a side portion of a long thin plate knife,
In the processing die knife performing bending on the knife, thereby forming integrally the die at the plate member, a substantially central portion of the die was passed through via an appropriate gap with the knife Toki該A knife processing die, comprising a hollow groove integrally formed with an edge portion parallel to both side portions of the knife.