JP2735452B2 - Knife bending equipment - 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 sheet-like sheet processing knife used for punching a sheet of paper, plastic, corrugated cardboard or the like into a predetermined shape by a punching press or the like, and for creases. (Hereinafter referred to as a knife) in a predetermined shape.

[0002]

BACKGROUND OF THE INVENTION For example, as shown in FIG. 12, a knife A of this kind has a thin wall (for example, a wall thickness of 0.4 to 1.0 mm),
It is band-shaped, has a cutting edge 1, and has a substantially rectangular cross section. The knife A is used by being fitted and fixed in a knife fitting groove 3 formed continuously through the wooden knife holding table 2. The knife fitting groove 3 has a predetermined shape (a shape corresponding to a punching die) in advance by, for example, laser processing.
Is formed. On the other hand, the knife A has its back 6
The knife A is placed along a platen (not shown), and is bent by being pinched from both sides of the knife A by a pair of bending dies. It is formed. However, in the conventional apparatus for bending the knife A as described above, when a pair of bending dies presses the knife A from both sides, the knife A is pressed by the action at that time.
Is flipped or tilted on the surface plate,
There is a problem that an accurate bending angle of the knife A with respect to the back 6 cannot be obtained. Further, in the conventional bending apparatus, the springback phenomenon (elastic rebound) of the knife A makes it necessary to repeat the pinching operation by the bending dies a considerable number of times in succession. There was a problem that it could not be done. Accordingly, the present invention has been made in view of the above circumstances, and has a knife with a high efficiency so that the back of the knife follows the surface plate and has an accurate bending angle with respect to the back. It is an object of the present invention to provide a bending device capable of processing into a shape.

[0003]

In order to achieve the above-mentioned object, the main means adopted by the present invention is, in summary, in an apparatus for bending a long thin plate-shaped knife, the length of the knife is reduced. A support mechanism for slidably supporting the knife from both sides thereof with one end of the direction being along the upper surface of the surface plate, an urging mechanism for urging the knife toward the upper surface of the surface plate, A bending mechanism that is disposed adjacent to the support mechanism with a predetermined gap therebetween and repeatedly applies a bending force to the knife supported by the support mechanism, and that the knife is moved each time bending is performed by the bending mechanism. a delivery mechanism for delivering the support mechanism for small amounts at a time several times, by changing the feed amount of the knife by the bending mechanism of the bending against the knife operation amount and / or the delivery mechanism, A bending apparatus of the knife according to the point at which it and a control device that controls the lower working radius.

[0004]

In the bending apparatus having the above configuration, the knife is held by the support mechanism and the urging mechanism with reference to the upper surface of the platen. The bending process is performed on the knife thus held by the bending mechanism. Each time the bending is performed, the knife is sent out from the support mechanism by the sending mechanism and is bent to a predetermined radius of curvature. According to such a procedure, the extension of the knife material caused by plastic deformation during processing is appropriately absorbed at the bent portion, and the knife is not sheared and has an accurate bending angle with respect to the upper surface of the platen. Processed in. In the bending apparatus according to the above configuration, since the bending operation amount of the bending mechanism with respect to the knife and the sending amount of the knife by the sending mechanism can be appropriately changed, the arbitrary curvature while appropriately suppressing the springback phenomenon with respect to the knife. Knife with radius
Can be shaped. Of course, the sending mechanism
For knives sent out multiple times in small quantities
Te, by controlling the bending radius continuously, can be carried out very efficiently bent into a predetermined shape.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention and is not intended to limit the technical scope of the present invention. FIG. 1 is a side view of a bending apparatus 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, and FIG. FIG. 5 is an enlarged view of a portion viewed from an arrow, FIG. 5 is a view showing a knife processing die constituting the bending apparatus, (A) is a perspective view, (B) is a front view, (C) is a plan view, (D) is a side view, (E) is an enlarged sectional view of a main part in (C), FIG. 6 shows a base holding the processing die, (A) is a front view, and (B) is FIG. 7C is a plan view, FIG. 7C is a side view, and FIG. 7 shows a knife processing die according to another embodiment.
9A is a front view, FIG. 8B is a cross-sectional view taken along the line CC ′ in FIG. 9A, FIG. 8C is a side view, FIG. 8 is a perspective view of a pressing roller device that constitutes the bending device, and FIG. Fig. 3 shows a detailed structure of the press roller device, (A) is a side view, (B) is a front view, and Fig. 10 is a die for bending when a knife is bent by the bending device. FIG. 11 is a plan view of the knife bent by the bending apparatus. As shown in FIGS. 1 to 4, the bending apparatus according to this embodiment has a knife A from both sides with the back 6 (one end in the longitudinal direction) of the knife A along the upper surface of the platen 7. , The urging mechanism 9 for urging the knife A toward the upper surface of the platen 7, and a predetermined gap t adjacent to the supporting mechanism 8 (see FIG. 4). And a bending mechanism 10 for applying a bending force to the knife A supported by the support mechanism 8, and the knife A is sent out from the support mechanism 8 each time bending is performed by the bending mechanism 10. The delivery mechanism 11 and the processing die 24 of the bending mechanism 10
And a control device 39 for changing the amount of bending movement of the knife A and / or the amount of knife A sent out by the sending mechanism 11. The support mechanism 8 includes a block 12 provided with a through groove for allowing the knife A to pass therethrough, and by appropriately replacing a spacer 13 attached to the front surface of the block 12, the support mechanism 8 can be connected to the bending mechanism 10. 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 disposed opposite to the upper surface of the surface plate 7 and presses the knife A toward the upper surface of the surface plate 7. Have been.

In this pressing roller device, the cutting edge 1 of the knife A is fitted into a peripheral surface of a roller 15 rotatably supported by a shaft 14, and a supporting groove 15 for supporting the tapered surface thereof.
a is engraved endlessly. The roller 15 is supported by a support shaft 16 so as to be swingable with respect to the upper surface of the platen 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 elongated hole 18 extends in the longitudinal direction of the bracket 18 supporting the roller 15.
The support shaft 16 attached to the bracket 19 is slidably fitted into the elongated hole 18a. The bracket 19 is provided with the operating lever 2.
The bracket 18 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 main body of the bending apparatus. The spring 17 is interposed between the bracket 21 and a position on the bracket 18 corresponding to an intermediate portion of the elongated hole 18a in the longitudinal direction. Therefore, in the pressing roller device according to the above configuration, when the operator grips the lever 20 and operates the lever 20 in, for example, the direction of the arrow 22a, the support shaft 16 moves to the position shown by the broken line in FIG. It is urged toward the upper surface of the platen 7 by the elastic urging force of the spring 17. On the other hand, when the lever 20 is operated to move in the direction of the arrow 22b,
The support shaft 16 moves to the position shown by the solid line in FIG. 2, and the roller 15 is urged upward by the action of the spring 17. Note that the swinging position in this case is regulated by the stopper 23. That is, in the pressing roller device, the position of the support shaft 16 is made relatively variable with respect to the position of the urging by the spring 17 so that the urging direction of the roller 15 with respect to the upper surface of the platen 7 is appropriately adjusted. It is configured so that it can be selectively switched. Therefore, with this pressing roller device, the knife A can be securely 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, It can respond appropriately. Further, by simply operating the lever 20 in the front-rear direction, the knife A
Can be switched between a holding state and a releasing state.

The bending mechanism 10 acts on the side of the knife A to bend the knife A.
4 (see FIG. 5). The processing die 24 is integrally formed of a thin plate-like member, and has a substantially central portion which is parallel to both sides of the knife A when the knife A is penetrated through an appropriate gap. A hollow groove 24b having an edge portion 24a is integrally formed by, for example, wire cutting. And this edge part 2
4a has been subjected to a quenching process. In this case, the above-mentioned appropriate gap means an operation for bringing the edge portion 24a into contact with only one side of the knife A when the processing die 24 is vibrated as described later. Acceptable dimensions. On the front side of the processing die 24, an arc-shaped peripheral surface 24 having a radius of curvature R is formed on the front side of the processing die 24 in order to easily pass the knife A after bending.
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 upper and lower positions. The lower end of the base 25 is supported by a slide bearing 26 so as to be linearly slidable in a direction (arrows 28a, 28b) perpendicular to the direction in which the knife A is fed (arrow 27) as shown in the drawing. ing.
The base 25 is driven to vibrate in the bending direction of the knife A by the motor 30 controlled by the control device 39 via the crank 29 together with the processing die 24. In this case, the working die 24 falls down with respect to the upper surface of the surface plate 7 (the arrow 27 above the working die 24).
The base member 25 has an upper portion formed in a substantially L-shape in order to prevent a fall in the direction.
The L-shaped tip 1 is slidably supported in the left-right direction.

[0008] The processing die 2 constructed as described above.
In No. 4, since the hollow groove 24b is integrally formed as described above, the parallelism of the edge portion 24a to the side portion of the knife A is ensured, and the knife A is accurately formed without causing a problem such as warpage. Bending can be performed while ensuring a proper squareness. In addition, the processing dies 24
Is made thin as described above, so knife A
Can be performed even with a bending process having a relatively small radius of curvature. Further, as shown in FIG. 10, the processing die 24 is controlled by the control device 39 so that a predetermined pressing time (stagnation time) T ₁ stagnates at the position of action on the knife A.
, The amount of springback at the knife A is greatly reduced as compared with the conventional apparatus, and extremely efficient bending can be performed. In this case, as the dwell time T _1, when, for example, the material of the knife A was generally the blade material, and the wall thickness and 0.7 to 1.0 mm,
A value of about 0.3 to 0.4 seconds is preferred. In the bending apparatus, the control device 39 determines the amount of bending operation of the knife A when the processing die 24 is vibrated and the amount of the knife A sent out by the sending mechanism 11 in the bending operation. It also has a function that can be changed each time it is done. Therefore, in this apparatus, the knife A is made to have, for example, a bellows shape, an arc shape, or a spiral shape (FIG. 11).
(See Reference). An example of the control will be described below. For example, when the sending amount of the knife A by the sending mechanism 11 is made variable within a range of 0.3 to 2 mm, and the knife A is bent to have a radius of curvature of 5 mm, for example, small amount for each bending amount out <br/> feed, for example, to operate the machining die 24 at a constant bending operation amount while feeding divided into 3-5 times with 0.5mm pitch, small arc The knife A can be easily and precisely bent into the shape shown in FIG. Then, as described above, the sending amount of knife A is
By changing in the range of 0.3 to 2 mm,
The knife A can be bent at the radius of curvature. Nye
Bending operation of the processing die 24 with the feeding amount kept constant
The same effect can be obtained even if the amount is changed for each bending portion.
Thus, in this embodiment , the feeding amount of the knife A or
Changes the amount of movement of the processing die so that the knife A
Can be controlled to bend at an arbitrary radius of curvature.
You. The control device 39 performs such control. Further, in this case, the knife A is formed in a spiral shape in a plan view by sequentially increasing the amount of sending by the sending mechanism 11. That is, the bending rate radius changes continuously.
A curved shape can be obtained. At the same time, the bending operation amount of the processing die 24 may be sequentially changed. For example, when the knife A is bent at 90 ° in a plan view, the knife A is bent at 45 ° by the processing die 24 in one bending operation. Thereafter, the knife A is sent out by, for example, 0.5 mm by the sending-out mechanism 11, and is further bent at 45 ° by the working die 24, so that the knife A is visually observed by approximately 9 mm.
A bending process of 0 ° is performed. In the above-described base 25 according to this embodiment, as shown in FIG. 6, the degree of inclination of the processing die 24 in the left-right direction (the arrow 28a with respect to the upper surface of the surface plate 7) is provided above the holding position of the processing die 24. , 28b) are screwed for fine adjustment of the inclination angle in the direction of 28b. By appropriately adjusting the screws 37 and 38, the working die 24 is inclined with respect to the surface plate 7, and in this state, the knife A is bent toward the upper surface of the surface plate 7. A component force in the direction of pushing down acts.
As a result, the bending process can be performed under a state where the back 6 of the knife A is always along the upper surface of the surface plate 7. FIG.
FIG. 9 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. By providing the cutout portion 24d in this manner, the tip portion of the knife A after bending can be inserted through the cutout portion 24d, and the knife A can be folded back.

The delivery mechanism 11 includes a plurality of rollers 32a, 32b, 33a, 33b, 3b so that the knife A can be sandwiched from both sides and delivered in the direction of arrow 27.
4a and 34b. Each of these rollers is an interlocking mechanism 3 comprising a plurality of belts, pulleys, and the like.
5 and is synchronously driven by a motor 36. The inner rollers 32b and 33b are supported so as to be able to change their positions in accordance with the thickness dimension of the knife, and are constantly elastically urged in the direction of arrow 28b by a spring. Then, the motor 36 is controlled in synchronization with the motor 30. In the bending apparatus configured as described above, the knife A is held by the support mechanism 8 and the urging mechanism 9 with reference to the upper surface of the platen 7. The bending mechanism 10 performs a bending process on the knife A thus held. That is, the hollow groove 24b of the processing die 24 is formed on the side of the knife opposite to the direction in which the knife A is to be bent.
The base 25 is vibrated by the motor 30 so that the edge portion 24a of the base 25 abuts. In this case, a predetermined stagnation time T ₁ and a feed time T _{2 of the} knife A are set in a state where the edge 24 a having a degree of parallelism with respect to the side of the knife A is erected perpendicular to the surface plate 7. Is repeatedly driven alternately, and the knife A is bent while securing an accurate squareness. Each time the bending process is performed, the knife A is sent from the support mechanism 8 by the sending mechanism 11 and is bent at a predetermined radius of curvature. According to such a procedure, the elongation of the knife material accompanying the plastic deformation at the time of working is favorably absorbed in the bent portion and the springback is also suppressed, so that the knife A is fixed without being sheared. It is processed under high efficiency at an accurate bending angle based on the upper surface of the board 7. Then, continuously changing of the feed amount of the knife A by bending operation amount and delivery mechanism 11 of the tool die 24 by the control unit 39
The knife A can be processed into various shapes as shown in FIGS. 11B and 11C by appropriately controlling the bending radius . In the bending apparatus according to the above configuration, by setting the gap t formed between the block 12 forming the support mechanism 8 and the processing die 24 forming the bending mechanism 10 to 0, the knife A Can be sheared at a right angle at a predetermined dimension.

[0010]

As described above, according to the present invention, in a device for bending a long thin plate-shaped knife, both ends of the knife in the longitudinal direction are arranged along the upper surface of the platen. A supporting mechanism for slidably supporting the knife, an urging mechanism for urging the knife toward the upper surface of the surface plate, and a urging mechanism disposed adjacent to the supporting mechanism with a predetermined gap therebetween. A bending mechanism for repeatedly applying a bending force to the knife supported by the support mechanism, a delivery mechanism for sending the knife from the support mechanism each time bending is performed by the bending mechanism, and a bending operation amount of the bending mechanism with respect to the knife and / or the delivery mechanism or by a bending apparatus of the knife, characterized by comprising and a control device for varying the feed amount of the knife et al, above Symbol bending mechanism and the delivery mechanism By varying the operation amount can be appropriately shaping the knife in any radius of curvature.
Of course, by continuously changing the above operation amount,
And the bending radius is continuously changed, as shown in FIG.
It is also possible to mold a knife of any shape as shown in (C)
It is possible.

[Brief description of the drawings]

FIG. 1 is a side view of a bending apparatus according to one embodiment of the present invention.

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

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

FIG. 4 is an enlarged view of a portion viewed from an arrow B in FIG. 2;

FIGS. 5A and 5B show a knife processing die constituting the bending apparatus, wherein FIG. 5A is a perspective view, FIG. 5B is a front view, FIG. 5C is a plan view, and FIG. (E) is an enlarged sectional view of a main part in (C).

6A and 6B show a base for holding the processing die, wherein FIG. 6A is a front view, FIG. 6B is a plan view, and FIG.
Is a side view.

7A and 7B show a knife processing die 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 press roller device constituting the bending device.

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

FIG. 10 is a graph showing an operation of the processing die when bending the knife by the bending apparatus.

FIG. 11 is a plan view of a knife subjected to bending by the bending apparatus.

FIG. 12 is a perspective view for explaining the background art of the present invention in a state before a knife is mounted on a knife holding table.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blade edge 6 ... Back part 7 ... Surface plate 8 ... Support mechanism 9 ... Urging 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 Slot 20 Lever 24, 24 'Dies 24a Edge 24b Hollow groove 25 Base 26 Slide bearing 29 Crank 30, 36 Motor 32a, 32b, 33a , 33b, 34a, 34b roller 35 interlocking mechanism 39 controller A knife

Claims (1)

(57) [Claims] An apparatus for bending a long thin plate-shaped knife, wherein the knife is slidably supported from both sides thereof with one end in the longitudinal direction of the knife along the upper surface of a platen. A supporting mechanism, an urging mechanism for urging the knife toward the upper surface of the surface plate, and a urging mechanism disposed adjacent to the supporting mechanism via a predetermined gap,
A bending mechanism for repeatedly applying a bending force to the knife supported by the support mechanism, and a sending-out mechanism for sending the knife from the support mechanism a small number of times each time bending is performed by the bending mechanism. and wherein the mechanism, the operation amount bent with respect to the knife of the bending mechanism and / or by changing the feed amount of the knife by the feed mechanism, to be formed by and a control device that controls the bending radius Knife bending equipment.