JP2000334519A - Device for feeding blade material for blade material bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade material feeding device for blade material bending machines with which the mutual interval between bending points of the blade material is determined with high accuracy. SOLUTION: A driving shaft 20 and feed roller 30 for transmitting feed force by the forward rotation of the driving shaft 20 to a blade material 100 by bringing into contact with the blade material 100 are provided. A recess 60 is provided on the feed roller 30 and a key 50 is provided on the driving shaft 20. The length of the recessed 60 is made longer than the width of the key 50 and the feed roller 30 is made so as to race in the forward direction by being dragged with the blade material 100 without causing a slip between the roller and the blade material 100 at the time of bending the blade material 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present inventors succeeded in the production of "cutting dies" (steel rule dies) for the first time in 1988, and have since succeeded in the production of blade material bending machines, especially automatic blade material bending machines. Recently it has become very popular. At present, a cutting die cuts a plywood with an NC carbon dioxide laser cutting machine to form a cutting groove. The blade material bent by the automatic blade material bending machine using the NC data is inserted into the above-mentioned cutting groove to complete the cutting. The present invention relates to a blade feeder used in such a blade bending machine.

[0002]

2. Description of the Related Art FIGS. 23 and 24 show in principle the structure of a blade material bending machine, and FIG. 25 shows an example of the shape of a blade material 100 bent by the blade material bending machine.
As shown in FIGS. 23 and 24, the blade material bending machine includes a mold 10 having a slit 11 for inserting a blade material, and a pressing tool 13 reciprocated in front of an edge (mold edge) 12 of the mold 10. ,
A blade member feeder A and the like provided behind the mold 10 are provided. In this blade material bending machine, a blade material feeding device A has a feed roller 30 attached to a drive shaft 20 connected to an output shaft of an electric motor such as a servo motor (not shown). The roller 40 is provided. The electric motor and the pusher 13 are controlled according to a computer program.

That is, the drive shaft 20 rotates forward by a predetermined angle as shown by an arrow a in FIG.
When the rotation is made forward by an angle corresponding to the rotation angle of 0, the band-shaped blade member 100 pressed against the feed roller 30 by the pressing roller 40 passes through the slit 11 of the mold 10,
Forward F by an amount corresponding to the forward rotation angle of the feed roller 30
To stop at that position. Next, the pressing tool 13 moves by a predetermined amount, and as shown in FIG. 24, the pressing tool 13 moves the blade material 100 protruding from the slit 11 into the mold edge 1.
Press 2 and fold. The bending angle of the blade member 100 at this time is determined by the amount of movement of the pusher 13. When the feed roller 30 is positively rotated by an angle corresponding to the rotation angle of the drive shaft 20 by the forward rotation of the drive shaft 20 due to the next operation of the electric motor, the blade material 100 bent in this manner is rotated forward. After being sent forward as much as the rotation angle, it is bent at that position by the operation of the pusher 13. The blade material 100 is bent by repeating the above operation a predetermined number of times.

In FIG. 25 showing an example of the shape of the blade material 100 thus bent, a plurality of bending points P
The bending angles at 1, P2, and P3 can be adjusted to some extent by using a manual bending machine afterward, so that high precision is not required. However, given distances Z1, Z between given bending points P1, P2, P3
For Z2 and Z3, high precision is required. This is because the bent blade material 100 is inserted into a slit-like mounting groove formed in a base plate (not shown), for example, a cutting groove cut by an NC carbon dioxide laser cutting machine, and is attached. It is used for punching and creasing various materials such as leather and plates. For this reason, the mutual intervals Z1, Z2 of the bending points P1, P2, P3
I have to dispose of the blade material 100 with Z3 error,
In addition, the bending process must be performed again.

[0005] In order to determine the distances Z1, Z2, Z3 between the bending points P1, P2, P3 with high accuracy and to enhance the blade material feeding accuracy, the blade material feeding device A described with reference to FIGS. The feed amount of the blade material 100 by the feed roller 30 needs to be determined with high accuracy. However, when the blade 100 is pressed against the die edge 12 of the die 10 by the pressing tool 13 and bent, a phenomenon occurs in which the blade 100 is pulled out of the die edge 12 by a very small force with a large force along with the bending. When such a phenomenon occurs, the blade member 100 slips between the feed roller 30 and the blade member 100. Even if the blade member is sent out according to the above program by the next operation of the electric motor, the blade member 100 is formed in advance. The interval between the set bending point and the subsequent bending point is not determined with high accuracy.

This will be described with reference to FIGS. 26 and 27. In FIG. 26, δ is the blade material 100 at the time of bending.
Represents the drawing length when drawn out of the mold edge. The reference point (blade material reference point) of the blade material 100 before bending sent to the bending position is represented by reference symbol X, and the reference point (roller reference point) of the feed roller 30 at that time is denoted by Q.
It is represented by As shown in FIG.
Is pulled forward F by the length δ, the blade material 10
Even if 0 slips with the feed roller 30 and the blade reference point X moves by δ from the initial position X1 to the position of X2, the position of the roller reference point Q does not move. After the slip, as shown in FIG. 27, the drive shaft 20 is rotated forward by the angle θ1 according to the above program, and the roller reference point Q is moved from the initial position Q1 to Q2
Is moved in the forward direction to the position, the blade material reference point X moves from the position X2 to the position X3 by the feed amount L1 corresponding to the movement amount of the roller reference point Q. For this reason, when the blade material 100 pulled out by slipping with the feed roller 30 at the time of the previous bending is fed by the feed roller 30 thereafter, the blade material 100 matches the drawn length δ with the feed amount L1. Since it is sent by the length L, it is sent by an extra length δ. Therefore, the interval between the previously formed bending point and the subsequent bending point cannot be determined with high accuracy.

In this case, if the drawing length δ is fixed, by setting the amount in the above program, the mutual distances Z1, Z2, Z3 between the bending points P1, P2, P3 can be set. It is possible to increase the blade material feeding accuracy by setting the accuracy to be high.

[0008]

However, various situations such as bending angle, variation in hardness and thickness, presence / absence and type of surface coating differ for each blade material 100, and even if the same material is used, Therefore, the condition of the blade material is different, so that the drawing length δ is not always constant. Therefore, accurate bending cannot be expected even if the amount relating to the drawing length δ is set in the program in advance. Incidentally, if the bending angle is 5 to 10 degrees, the drawer length δ can be ignored, but the bending angle is 45 °.
~ 90 degrees or larger, the drawer length δ is 1
mm.

[0009] As described above, conventionally, the blade material 1 is not bent at the time of bending.
Since it was impossible or difficult to perform control in consideration of the drawing length δ when 00 was pulled out from the mold edge, the bending points P1, P2, and B2 of the blade member 100 as described with reference to FIG. It has been difficult to determine the intervals Z1, Z2, Z3 of P3 with high accuracy and to increase the blade material feeding accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and it is possible to absorb, between a drive shaft and a feed roller, the length of the blade material that is pulled out when the blade material is bent, and to draw out the length. After the absorption of the length δ, by taking into account the drawing length δ, by providing a means capable of rotating the feed roller in the forward direction by the amount corresponding to the next forward rotation angle of the drive shaft, as described in FIG. The mutual spacing Z1, of the bending points P1, P2, P3 according to the given data of the blade material 100
An object of the present invention is to provide a blade material feeder capable of easily determining Z2 and Z3 with high accuracy.

[0011]

A blade material feeder of a blade material bending machine according to the present invention will be described with reference to the reference numerals in the drawings.
This blade material feeder has a rotation angle larger than an angle at which the feed roller 30 is normally rotated by being pulled by the blade material 100 pulled out from the die edge 12 when the blade material 100 is pressed and bent against the die edge 12. The apparatus includes a drive shaft 20 for which one forward rotation angle is controlled, and the feed roller 30 that contacts the blade member 100 and transmits a feed force by the forward rotation of the drive shaft 20 to the blade member. Here, when the blade material is pressed against the mold edge and bent, the length of the blade material pulled out from the edge is about 1 mm at most as described above, so that the blade material used in a normal blade material bending machine is used. One forward rotation angle of the drive shaft of the feed device is larger than an angle at which the feed roller is normally rotated by the blade material. Therefore, it is considered that this condition is satisfied by all existing blade material feeders of the type in which feed rollers are attached to the drive shaft.

In the present invention, the feed roller 30
However, the drive shaft 20 can idle in the forward direction by at least the same rotation angle as the angle at which the blade member 100 is pulled forward by the blade member 100. Further, an engagement portion (key 50) is provided on the drive shaft 20, and the feed roller 30
When the feed roller 30 is pulled by the blade member 100 and idles in the forward direction with respect to the drive shaft 20, the feed roller 30 separates from the engaging portion (key 50) in the idle direction by an amount corresponding to the idle angle, and An engaged portion (wall surface 61) for transmitting the forward rotation of the drive shaft 20 to the feed roller 30 by being pushed by the engaging portion (key 50) is provided.

According to this blade material feeder, when the blade material 100 is pulled out of the mold edge at the time of bending, the feed roller is idled in the forward direction with respect to the drive shaft by the blade material being pulled by the blade material.
Due to the idling, the engaged portion is separated from the engaging portion on the drive shaft side by an amount corresponding to the idling angle. Due to the idling of the feed roller at this time, the length of the blade material pulled out from the mold edge at the time of bending is absorbed.

Thereafter, when the drive shaft 20 rotates forward, the drive shaft idles in the forward direction with respect to the feed roller until the engaging portion of the drive shaft hits the engaged portion. Due to the idling of the drive shaft, the length of the blade material pulled out from the mold edge during the previous bending is included in the feed amount of the blade material for the next bending. After the engaging portion of the drive shaft hits the engaged portion, when the drive shaft is further rotated forward, the engaged portion is pushed by the engaging portion and the forward rotation of the drive shaft is transmitted to the feed roller, The blade material is fed by an amount corresponding to the forward rotation angle of the feed roller.

Therefore, the forward rotation angle of the feed roller is
The angle is a combination of the angle corresponding to the length of the blade material pulled out from the mold edge during the previous bending and the angle driven by the drive shaft. Such a forward rotation angle of the feed roller accurately and accurately corresponds to the interval between the bending point of the blade material formed earlier and the subsequent bending point.

In the blade material feeder according to the present invention, the feed roller 30 is elastically urged in the reverse rotation direction, and
It is possible to adopt a configuration in which the reverse rotation of the drive shaft is disabled when the feed roller is reversely rotated by the elastic urging force.

With this configuration, the feed roller idles in the forward direction with respect to the drive shaft due to the blade material pulled out from the mold edge at the time of bending, and the engaged portion drives the drive shaft by the idle rotation. After being separated from the engaging portion on the side by an amount corresponding to the idling angle, the pulled-out blade material is pulled back again by the reverse rotation of the feed roller caused by the elastic urging force. in this case,
When the bending angle of the previous blade was small, the blade is completely pulled back by the same length as the length that was pulled out by the bending, but depending on the bending angle of the blade, it may not be completely pulled back. obtain. For example, in FIG. 24, there is a case where the bending point is hooked on the mold edge 12 when the bending is performed at 90 degrees.

When the blade member is completely pulled back, the engaged portion has already hit the engaging portion when the drive shaft 20 starts to move thereafter. Rotates forward, and the blade material is fed by an amount corresponding to the forward rotation angle of the feed roller. Therefore, the interval between the bending point of the previously formed blade material and the subsequent bending point is determined with high precision.

If the blade material is not completely pulled back, the drive shaft 20 is thereafter moved in the same manner as described above.
When the is rotated forward, the drive shaft idles in the forward direction with respect to the feed roller until the engagement portion of the drive shaft hits the engaged portion. Is included in the feed amount of the blade material for the next bending. After the engaging portion of the drive shaft hits the engaged portion, when the drive shaft is further rotated forward, the engaged portion is pushed by the engaging portion and the forward rotation of the drive shaft is transmitted to the feed roller, The blade material is fed by an amount corresponding to the forward rotation angle of the feed roller. Therefore, the forward rotation angle of the feed roller is an angle obtained by adding the angle corresponding to the shortage and the angle driven by the drive shaft.
Such a forward rotation angle of the feed roller accurately and accurately corresponds to the interval between the bending point of the blade material formed earlier and the subsequent bending point.

In the blade material feeder according to the present invention, the engaging portion and the engaged portion are keys provided separately to the drive shaft and the feed roller, and a recess accommodating the keys. It is desirably formed by the wall of the place. With this configuration, highly accurate feeding can be performed while the structure is extremely simple. Further, even if the key or the wall surface of the recess is worn, the precision of feeding the blade material does not decrease.

Further, the blade material feeder according to the present invention preferably has a braking means for preventing the blade material from being fed against an external force applied to the blade material in the feed direction. The external force includes, for example, a force at which the coil is released when the blade material is a coil material. As described above, when the braking device for stopping the feed of the blade material against the external force applied to the blade material in the feed direction is provided, the feed roller unexpectedly rotates in the forward direction, and the blade material of the blade material is inadvertently rotated. A situation in which the feeding accuracy is reduced is prevented.

Furthermore, in the blade feeder according to the present invention, the end 24 of the drive shaft 20 having the engaging portion and the end 36 of the feed roller 30 having the engaged portion face each other and are concentric. And the engaging portion and the engaged portion are groove-shaped recesses 6.
3 and a rib-like projection 51 fitted in the recess. In this case, the rotation center shaft 52 and the hole 65 into which the rotation center shaft is fitted are provided by being divided into the recesses and the projections, and the rotation center shaft and the hole cooperate with each other. It is desirable that the feed roller can be rotated without misalignment with respect to the drive shaft. As described above, as a specific configuration for enabling the feed roller to rotate without misalignment with respect to the drive shaft, for example, a configuration in which a rotation center shaft is slidably supported in a hole portion or It is possible to preferably adopt a configuration in which a bearing 53 is interposed between the rotation center axis and the hole wall of the hole, and the rotation center axis is rotatably supported by the hole via the bearing. In these cases, when the end of the feed roller facing the end of the drive shaft is rotatably supported by the housing H via a bearing, the rotation of the feed roller is reduced. The misalignment is more reliably prevented (see FIGS. 19 to 21).

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 are operation explanatory views showing the principal parts of a blade material feeder according to the present invention. In these figures, reference numeral 50 denotes a key provided as an engaging portion provided on the drive shaft 20, reference numeral 60 denotes a recess provided in the feed roller 30, and a recess 6 which is located in the forward rotation direction of the feed roller 30.
The zero wall surface 61 is formed as an engaged portion corresponding to the above-described engaging portion formed of the key 50. The feed roller 30 is attached to the drive shaft 20 in a fitting manner, and a key 50 protruding from the drive shaft 20 is fitted into the recess 60 on the feed roller 30 side. The drive shaft 20 is rotatably driven by an unillustrated electric motor (a servo motor can be suitably used).

The circumferential length of the recess 60 is determined by the key 50
Greater than the width of. For this reason, the feed roller 30 and the drive shaft 20 can relatively idle within a range in which the key 50 can move between the wall surface 61 as the engaged portion of the recess 60 and the wall surface 62 on the opposite side. . Here, the angle at which the key 50 can relatively move between the wall surfaces 61 and 62 on both sides of the recess 60 is determined so that the feed roller 30 does not slip due to being pulled by the blade member 100 when the blade member 100 is bent. The angle of rotation is at least the same as the angle of normal rotation, and in the illustrated example, it is slightly wider than the angle of rotation. In addition, one forward rotation angle of the drive shaft 20 depends on the blade material 10 when the blade material 100 is bent.
The angle θ2 at which the feed roller 30 is normally rotated by being pulled toward 0
One forward rotation angle is controlled to a larger rotation angle.

FIG. 1 shows the blade member 100 sent out to a predetermined position before bending. The reference point (blade material reference point) of the blade material 100 is denoted by reference symbol X, and the reference point (roller reference point) of the feed roller 30 at this time is denoted by reference symbol Q. At this time, it is assumed that the key 50 is in contact with the wall surface 61 of the recess 60, and there is no gap between them.

When the blade member 100 is pulled out to the front F by the length δ as shown in FIG. 2 when the blade member 100 is pressed against the mold edge 12 and bent as described with reference to FIG. As the material reference point X moves from the initial position X1 to the position of X2, the feed roller 30 is pulled by the blade material 100 and idles in the forward direction, and the roller reference point Q moves to the initial position Q.
Move from 1 to Q2. On the other hand, drive shaft 2
Since 0 does not rotate, the key 50 remains at the original position. Accordingly, the wall surface 61 of the recess 60 is separated from the key 50 in the idling direction of the feed roller 30 by an amount corresponding to the idling angle, and a gap S1 is formed therebetween. Feed roller 3 at this time
By the idling of 0, the drawing length δ of the blade material 100 drawn from the die edge at the time of bending is absorbed.

Thereafter, when the drive shaft 20 rotates forward by a predetermined angle in accordance with a computer program, the key 50 hits the wall surface 61 of the recess 60 as shown in FIG.
Until the condition shown in FIG.
Idle in the positive direction. Therefore, the blade material reference point X remains at the position of X2, and the roller reference point Q also becomes Q2.
In the position. θ2 indicates a forward rotation angle due to idling of the drive shaft 20. Due to the idling of the drive shaft 20 at this time, the drawing length δ of the blade member 100 pulled out from the die edge during the previous bending is included in the feed amount of the blade member 100 for the next bending. .

As shown in FIG. 3, the key 50 is
After hitting 1, when the drive shaft 20 is further rotated forward by the remaining angle, the wall 61 is pushed by the key 50 as shown in FIG. 4, and the forward rotation of the drive shaft 20 is transmitted to the feed roller 30,
The blade member 100 is fed by a feed amount L2 corresponding to the forward rotation angle θ3 of the feed roller 30 at that time. Therefore, the blade member reference point P moves from the position X2 to the position X3, and the roller reference point Q moves from the position Q2 to the position Q3.
For this reason, the blade material 100 pulled out at the time of the previous bending
However, when the blade material 100 is subsequently fed by the feed roller 30, the blade material 100 is fed by a length L0 that is the sum of the drawing length δ and the feed amount L2. Therefore, the forward rotation angle θ of the feed roller 30 is equal to the angle (corresponding to θ2) corresponding to the drawing length δ of the blade material pulled out from the die edge at the time of the previous bending and the angle θ3 driven by the drive shaft 20. Angle. Such a forward rotation angle θ of the feed roller accurately and accurately corresponds to the interval between the bending point of the blade material formed earlier and the subsequent bending point.

The feed roller 30 may be elastically urged in the reverse rotation direction. In this case, the drive shaft 20
When the feed roller 30 is reversely rotated by the elastic urging force, the reverse rotation cannot be performed. FIG. 5 to FIG. 8 are operation explanatory views for explaining principal parts of the blade material feeding device thus configured.

In this blade material feeder, the blade material reference point X is located at the initial position X1 as shown in FIG.
Is also at the initial position Q1, the feed roller 3
0 is elastically urged in the reverse rotation direction as shown by the arrow B. When the feed roller 30 idles in the forward direction with respect to the drive shaft 20 due to the blade member 100 pulled out from the mold edge by δ when the blade member 100 is bent, the idling causes the wall surface 61 of the concave portion 60 to rotate. As shown at 6, the key 50 is separated from the key 50 by an amount corresponding to the idling angle. At the time when the bending is completed, the blade member 1 pulled out by δ as shown in FIG.
00 is pulled back again. In this case, the last blade material 100
Is small, the blade member 100 is completely pulled back by the same length δ as the length δ drawn by the bending. When the blade member 100 is completely pulled back in this way, the wall surface 61 of the recess 60 hits the key 50. Therefore, since the wall surface 61 has already hit the key 50 at the time of the initial movement of the drive shaft 20 thereafter, the feed roller 30 rotates forward as much as the drive shaft 20 matches the forward rotation angle. The blade material 100 is sent as much as possible. Therefore, the interval between the bending point of the previously formed blade material and the subsequent bending point is determined with high precision.

On the other hand, depending on the bending angle of the blade member 100,
It may happen that the blade member 100 is not completely pulled back. This case is shown in FIG. 8, and the retraction length of the blade is indicated by δ1 (δ1 <δ). Thus, the blade material 10
0 is not completely pulled back, then when the drive shaft 20 is rotated forward, the key 50 is
1, the drive shaft 20 idles in the forward direction with respect to the feed roller 30.
(Δ−δ1) is included in the feed amount of the blade member 100 for the next bending. When the drive shaft 20 is further rotated forward after the key 50 hits the wall surface 61, the wall surface 61 is pressed by the key 50 and the forward rotation of the drive shaft 20 is transmitted to the feed roller 30, and the forward rotation of the feed roller 30 is performed. The blade member 100 is sent by an amount corresponding to the angle. Therefore, the forward rotation angle of the feed roller 30 is equal to the shortage (δ
−δ1) and the angle driven by the drive shaft 20. Such a forward rotation angle of the feed roller 30 accurately and accurately corresponds to the interval between the bending point of the blade material formed earlier and the subsequent bending point. 5 to 8, the same elements as those in FIGS. 1 to 4 are denoted by the same reference numerals.

FIGS. 9 to 17 are explanatory views exemplifying means for urging the feed roller 30 in the reverse rotation direction.

In the example shown in FIG. 9, a spring 71 made of a tension coil spring is interposed between a rod 21 fixed to the drive shaft 20 and a pin 31 provided on the feed roller 30. Are elastically urged in the reverse rotation direction R. The spring body 71 has a metal wire such as a piano wire,
It is possible to use a plastic wire, a glass fiber wire, or the like. Further, instead of the spring body 71, an elastic body such as an O-ring or rubber can be used.

In the example shown in FIG. 10, a spring 72 made of a compression coil spring is interposed between the rod 22 fixed to the drive shaft 20 and the spring receiving surface 32 provided on the feed roller 30. 30 is elastically urged in the reverse rotation direction R. The material such as the above-described metal wire can be used for the spring body 72.

In the example shown in FIG. 11, one end of a spring body 73 composed of a spiral spring is fixed to the drive shaft 20 and the other end is fixed to a pin 33 provided on the feed roller 30, so that the feed roller 30 is elastically urged in the reverse rotation direction R. The material such as the above-described metal wire can be used for the spring body 73.

In the example shown in FIG. 12, an elastic body 74 such as rubber, sponge, air bag or the like is interposed between the rod 23 fixed to the drive shaft 20 and the receiving surface 34 provided on the feed roller 30. Feed roller 3 by the elasticity of
0 is elastically urged in the reverse rotation direction R.

In the case of FIG. 13, an elastic body 75 such as rubber, sponge, air bag or the like is provided in the recess 60 of the feed roller 30.
The feed roller 30 is elastically urged in the reverse rotation direction R by the elasticity of the elastic body 75.

In the example shown in FIG. 14, the radially extending elastic wings 78 of the jig 76 in which the ring 77 is fixed to the drive shaft 20 are hooked on the pins 35 provided on the feed roller 30, whereby The feed roller 30 is elastically urged in the reverse rotation direction R by the elasticity of the elastic blade portion 78. The jig 76 can be made of a material such as plastic or glass fiber.

In the case of FIGS. 15 and 16, an elastic body 79 such as a soft resin such as vinyl or rubber is filled in a space formed between the drive shaft 20 and the feed roller 30, and the elastic body 79 is twisted. The feed roller 30 is elastically urged in the reverse rotation direction by elasticity.

In the case of FIG. 17, a spring 82 made of a torsion coil spring is interposed between an output shaft 80 of an electric motor M such as a servomotor and the feed roller 30, and the feed roller 30 is reversed by the spring 82. It is elastically biased in the direction of rotation.

In the above-described blade material feeder, the blade material 1
It is desirable to have a braking means for preventing the blade material 100 from being fed against an external force in the feed direction applied to 00. The external force in the feed direction applied to the blade material 100 includes the blade material 1
When 00 is a coil material, there is a force to unwind the coil. FIG. 18 illustrates the braking means. In this braking means, the feed roller 30 and the holding roller 40 are
1 and 92, and the blade material 10
A method is adopted in which a pair of spring members 93 and 93 press and hold the spring 0. By doing so, it is possible to prevent a situation in which the feed roller 30 unexpectedly rotates in the forward direction and the blade material feeding accuracy of the blade material 100 is reduced.

FIGS. 19 to 21 specifically show the structure of the connecting portion between the drive shaft 20 and the feed roller 30.
20 is a partial cross-sectional view of a connecting portion, FIG. 20 is an enlarged cross-sectional view of a main part in FIG. 19, and FIG. 21 is a cross-sectional view along the line XXI-XXI in FIG.

In this connection portion, the end 24 of the drive shaft 20 and the end 36 of the feed roller 30 are disposed concentrically facing each other, and the end 36 of the feed roller 30
Are rotatably supported by bearings 37 attached to the housing H. Then, the end 2 of the drive shaft 20
As shown in FIG. 21, a groove-shaped recess 63 that crosses the end face in the diametrical direction is formed in 4. The recess 63 is formed so as to extend outward from the center of the drive shaft 20, and a wall surface 64 of the recess 63 is an engagement portion. On the other hand, the end 36 of the feed roller 30 is
A rib-shaped projection 5 diametrically crossing the end face as in 1
The protrusion 51 is fitted in the recess 63. The projection 51 forms an engaged portion as a counterpart of the engaging portion. Further, the recess 6
3 is provided with a hole 65, whereas the protrusion 5
1 is provided with a rotation center axis 52,
Are inserted into the hole 65, and a bearing 53, which is a needle bearing, is interposed between the rotation center shaft 52 and the hole wall of the hole 65. In addition, the drive shaft 20 has a casing H near the end 24 via a bearing 25.
It is supported rotatably. The rotation of an electric motor M such as a servomotor is transmitted to the drive shaft 20 at a reduced speed. Further, a spring body 82 composed of a torsion coil spring is interposed between the drive shaft 20 and the feed roller 30,
The feed roller 30 is elastically urged in the reverse rotation direction by the spring body 82. This point corresponds to the configuration described with reference to FIG. Other items are the same as those described with reference to FIGS.

In FIGS. 19 to 21, the upper and lower bearings 25, 37 attached to the same casing H are shown.
In this way, a portion near the end portion 24 of the drive shaft 20 and the end portion 36 of the feed roller 30 are rotatably supported, and between the supporting portions, the rotation center shaft 52 is provided with the bearing 53 in the hole 65. The feed roller 30 is rotated with respect to the drive shaft 20 without misalignment. Such an effect is also exerted by omitting the bearing 53 and supporting the rotation center shaft 52 in the hole 65 so as to be slidable and rotatable. This is advantageous when the drive shaft 20 has a small diameter and it is difficult to secure a space for installing the bearing 52.

As described above, in the apparatus described with reference to FIGS. 19 to 21, there is no possibility that the accuracy of blade material feeding is reduced due to misalignment between the drive shaft 20 and the feed roller 30. 19 to 21, the same or corresponding elements as those in FIGS. 5 to 8 or 17 are denoted by the same reference numerals, and detailed description is omitted.

FIG. 22 is a partially broken front view specifically showing another structure of the connecting portion between the drive shaft 20 and the feed roller 30.

In this connection portion, the feed roller 30
A key 54 is attached to the end shaft 38 of the key.
Are housed in a recess 66 provided in the drive shaft 20. Then, the wall surface of the recess 66 is used as an engagement portion, and the key 54
Form an engaged part as a counterpart of the engaging part.

In comparison with the structure shown in FIG. 22 and the structure described with reference to FIGS. 5 to 8, in the structure shown in FIG. While the key 54 as the engaging portion is provided on the feed roller 30 side, in the structure of FIGS. 5 to 8, the key 50 as the engaging portion is provided on the drive shaft 20 side and the engaged portion The only difference is that the wall surface 61 of the recess 60 is provided on the feed roller 30 side, and the effect of the cooperation between the engaging portion and the engaged portion is different from the structure shown in FIG. 8 to FIG. 8 in principle. In addition, a spring 82 composed of a torsion coil spring is interposed between the drive shaft 20 and the feed roller 30 in that the drive shaft 20 is rotationally driven by an electric motor M such as a geared motor. The point that the roller 30 is elastically urged in the reverse rotation direction corresponds to the configuration described with reference to FIG. Therefore, the same or corresponding parts as those shown in FIG. 17 are denoted by the reference numerals used in FIG.

[0049]

As described above, according to the present invention, there is provided a blade feeder which can easily determine the mutual interval between the bending points of the blade as described with reference to FIG. 25 with high accuracy. It becomes possible.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view illustrating an initial state of a main part of a blade material feeding device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view illustrating another state of a main part of the blade material feeding device.

FIG. 3 is an operation explanatory view illustrating still another state of a main part of the blade material feeding device.

FIG. 4 is an operation explanatory view illustratively showing still another state of a main part of the blade material feeding device.

FIG. 5 is an operation explanatory view illustrating an initial state of a main part of a blade material feeding device according to another embodiment of the present invention.

FIG. 6 is an operation explanatory view illustrating another state of a main part of the blade material feeding device.

FIG. 7 is an operation explanatory view illustrating still another state of a main part of the blade material feeding device.

FIG. 8 is an operation explanatory view illustrating still another state of a main part of the blade material feeding device.

FIG. 9 is an explanatory view exemplifying an elastic urging means of a feed roller.

FIG. 10 is an explanatory view exemplifying another elastic urging means of a feed roller.

FIG. 11 is an explanatory view exemplifying still another resilient urging means of a feed roller.

FIG. 12 is an explanatory view exemplifying still another resilient urging means of a feed roller.

FIG. 13 is an explanatory view exemplifying still another resilient urging means of a feed roller.

FIG. 14 is an explanatory view exemplifying still another resilient urging means of a feed roller.

FIG. 15 is an explanatory view exemplifying still another resilient urging means of a feed roller in a partially cutaway side view.

FIG. 16 is a sectional view taken along the line XVI-XVI in FIG.

FIG. 17 is an explanatory view exemplifying still another resilient urging means of the feed roller in a partially cutaway side view.

FIG. 18 is an explanatory view illustrating a braking means.

FIG. 19 is a partial cross-sectional view of a specific example of a structure of a connecting portion between a drive shaft and a feed roller.

FIG. 20 is an enlarged sectional view of a main part of FIG. 19;

21 is a sectional view taken along the line XXI-XXI in FIG.

FIG. 22 is a partial cross-sectional view of another specific example of the structure of the connecting portion between the drive shaft and the feed roller.

FIG. 23 is a principle view of a blade material bending machine using the blade material feeding device.

FIG. 24 is a principle view of another state of the blade material bending machine using the blade material feeding device.

FIG. 25 is an explanatory diagram of a bent blade material.

FIG. 26 is an explanatory diagram for explaining a conventional problem.

FIG. 27 is an explanatory diagram for explaining a conventional problem.

[Explanation of symbols]

 12 type edge 20 drive shaft 24 end of drive shaft 30 feed roller 36 end of feed roller 37 bearing 50 key (engaging portion) 51 rib-shaped protrusion (engaged portion) 52 rotation center shaft 53 bearing 54 key ( Engaged portion) 60 concave portion 61 Wall surface of the concave portion (engaged portion) 63 concave portion 64 Wall surface of the concave portion (engaged portion) 65 hole portions 91, 92, 93 Spring material (braking means) 100 Blade material

Claims (7)

[Claims] When a blade material is pressed against a mold edge and bent, one forward rotation angle is set to a rotation angle larger than an angle at which the feed roller rotates forward due to the blade material pulled out from the mold edge. A driven shaft that is controlled, and the feed roller that contacts the blade material and transmits a feed force by forward rotation of the drive shaft to the blade material, wherein the feed roller is pulled by the blade material At least the same rotation angle as the normal rotation angle is allowed to rotate in the forward direction with respect to the drive shaft, and the drive shaft is provided with an engaging portion, and the feed roller is provided with the blade material. When the drive shaft is idled in the forward direction with respect to the drive shaft, the drive shaft is separated from the engagement portion by an amount corresponding to the idle rotation angle in the idle direction, and is pushed by the engagement portion to cause the drive shaft to rotate. Forward rotation The blade member feeder blade member bending machine, wherein the engaged portion is transmitted to the feed roller. 2. The reverse rotation of the drive shaft is not possible when the feed roller is resiliently urged in the reverse rotation direction and the feed roller is reversely rotated by the repulsive urging force. 2. The blade feeder of the blade bending machine according to 1. 3. The engaging portion and the engaged portion are formed by a key provided separately to the drive shaft and the feed roller and a wall surface of a recess accommodating the key. A blade material feeding device for a blade material bending machine according to claim 1 or 2. 4. The blade according to claim 1, further comprising braking means for preventing the blade material from being fed against an external force applied to the blade material in a feed direction. Blade feeder for a bar bending machine. 5. An end of the drive shaft having an engaging portion and an end of the feed roller having an engaged portion are concentrically provided facing each other, and the engaging portion and the engaged portion are arranged in a concentric manner. It is formed by the wall surface of the groove-shaped recess and the rib-shaped projection fitted into the recess, and the rotation center axis and the hole into which the rotation center axis is fitted are distributed to the recess and the projection. The blade material feeder for a blade material bending machine according to claim 3, wherein the blade material feeding device is provided and the rotation center axis is slidably supported by the hole. 6. An end portion of the drive shaft having an engaging portion and an end portion of the feed roller having an engaged portion are opposed to each other and concentrically provided, and the engaging portion and the engaged portion are separated from each other. It is formed by the wall surface of the groove-shaped recess and the rib-shaped projection fitted into the recess, and the rotation center axis and the hole into which the rotation center axis is fitted are distributed to the recess and the projection. The bearing is interposed between the rotation center axis and the hole wall of the hole, and the rotation center axis is rotatably supported by the hole via the bearing. Blade feeder for blade bending machine. 7. The blade material bending machine according to claim 5, wherein an end of the feed roller facing the end of the drive shaft is rotatably supported by a housing via a bearing. Blade material feeder.