JP3261577B2 - Blade material feeder of blade material bending machine - Google Patents

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]

The blade member feeder blade member bending machine Means for Solving the Problems] According to the invention of claim 1 will be described with reference to the reference numerals in FIGS. This blade material feeder presses the blade material 100 against the die edge 12 and bends the die edge 1 when it is bent.
The rotation angle of the feed roller 30 is set to be larger than the angle at which the feed roller 30 is normally rotated by the blade material 100 drawn from
Drive shaft 20 in which the number of forward rotations is controlled, and this drive shaft
And a feed roller 30 that is attached to the blade member 20 and contacts the blade member 100 to transmit a feed force generated by 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. Also, the drive shaft 20 is keyed.
And the feed roller 30 is fitted with the key.
When the feed roller 30 is pulled by the blade material 100 and idles in the forward direction with respect to the drive shaft 20, the key 60 is rotated in the idle direction in the recess 60. and separated by an amount commensurate with the idling angle, and the upper
The drive shaft 20 by being pressed by the serial key 50
The wall 61 that transmits the forward rotation of the roller to the feed roller 30 is
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.
The idling causes the wall surface 61 of the recess 60 to separate from the key 50 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 key 50 of the drive shaft contacts the wall surface 61 of the recess 60 . 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. Drive shaft key 50 is recess 6
When the drive shaft is further rotated forward after hitting the wall surface 61 of No. 0, the wall surface 61 of the recess 60 is pushed by the key 50 and the forward rotation of the drive shaft is transmitted to the feed roller, and the forward rotation angle of the feed roller The blade material is sent as much as possible.

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 second aspect of the present invention, the feed roller 30 is resiliently urged in a reverse rotation direction, and the feed roller is reversely rotated by the repulsive urging force. Reverse rotation of the drive shaft is disabled. A blade material feeder for a blade material bending machine according to claim 2 of the present invention.
Will be described with reference to the reference numerals in FIGS.

The recess 6 by With this design, the feed is Zura Pull blade member drawn from the mold edges during folding roller idles in the positive direction relative to the drive shaft, the idling
After the zero wall surface 61 separates from the key 50 on the drive shaft 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 due to the elastic urging force.
In this case, when the bending angle of the previous blade material is small, the blade material is completely pulled back by the same length as the length drawn by the bending, but depending on the bending angle of the blade material,
It is possible that it will not be completely pulled back. 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.

If the blade material is completely pulled back, the key 50 will already have the wall of the recess 60 when the drive shaft 20 starts to move.
Since the surface 61 is in contact, the feed roller rotates forward as much as its drive shaft matches the forward rotation angle, and the blade material is fed as much as 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.
Is rotated forward, the key 50 of the drive shaft
Since the drive shaft idles in the forward direction with respect to the feed roller until it hits the wall surface 61 , the shortage of the retraction length of the blade material is included in the feed amount of the blade material for the next bending due to the idle rotation. After the drive shaft key 50 hits the wall surface 61 of the recess 60 and the drive shaft is further rotated forward, the recess 60
The wall surface 61 is pressed by the key 50 , and the forward rotation of the drive shaft is transmitted to the feed roller, and 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.

The blade material feeder according to the third aspect of the present invention 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.

According to a fourth aspect of the present invention, a blade material is fed by the blade material bending machine.
The device will be described with reference to the reference numerals in FIGS.
You.

In the blade material feeder according to the fourth aspect of the present invention, when the blade material 100 is pressed against the mold edge 12 and bent, the blade material 1 pulled out from the mold edge 12 is bent.
00, the drive shaft 20 having one forward rotation angle controlled to a rotation angle larger than the forward rotation angle of the feed roller 30, and the drive shaft 20 being in contact with the blade material 100.
And a feed roller 30 for transmitting a feed force due to the forward rotation of the blade material to the blade material.
The drive shaft 20 is allowed to idle in the forward direction by at least the same rotation angle as the angle of rotation of the drive shaft 20 while being engaged with 00, and an engagement portion is provided at an end of the drive shaft 20; At the end of the feed roller 30, when the feed roller 30 is pulled by the blade material 100 and idles with respect to the drive shaft 20 in the forward direction, an amount corresponding to the idling angle in the idle direction from the engagement portion in the idle direction. An engaged portion is provided which transmits the forward rotation of the drive shaft 20 to the feed roller 30 by being separated and pushed by the engagement portion,
An end portion of the drive shaft 20 having an engaging portion and an end portion of the feed roller 30 having an engaged portion are concentrically provided facing each other,
The engaging portion and the engaged portion are formed by a wall surface 64 of a groove-like recess 63 and a rib-like protrusion 51 fitted in the recess 63, and the rotation center axis 52 is formed on the protrusion 51 by the rotation center shaft 52. Depression
The hole 65 into which the rotation center shaft 52 is fitted is
And the rotation center shaft 52 is provided with a hole 65.
Is slidably and rotatably supported.

According to this, by the cooperation of the rotation center axis and the hole, the feed roller rotates without being decentered 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 , Claim 5
As in the invention, the 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. can do. In these cases, if the end of the feed roller facing the end of the drive shaft is rotatably supported by the housing H via a bearing as in claim 6 , The misalignment when the roller rotates can be more reliably prevented.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 are operation explanatory views for explaining principal parts of a blade feeder according to the first aspect of the present invention. In these drawings, 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 wall surface of the recess 60 located in the forward rotation direction of the feed roller 30. 61 is formed as an engaged part corresponding to the above-mentioned engaging part which is the key 50. Feed roller 30
Are attached to the drive shaft 20 in a fitting manner, and the drive shaft 2
The key 50 protruding from 0 is fitted in 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 pressed against the mold edge 12 and bent as described with reference to FIG. 24, if the blade member 100 is pulled out to the front F by the length δ as shown in 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.

According to the second aspect of the present invention, the feed roller 30
Is resiliently biased in the reverse rotation direction, and the drive shaft 20
When the feed roller 30 is reversely rotated by the elastic urging force, the reverse rotation is not possible. 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 contacted the key 50 at the time of the initial movement of the drive shaft 20, 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 case of 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, and the feed roller is moved by the spring 72. 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 case shown in FIG. 11, one end of a spring 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 spring 73 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 so that 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.

The blade feeder according to the third aspect of the present invention has a braking means for preventing the feed of the blade 100 against the external force applied to the blade 100 in the feed direction. The external force in the feed direction applied to the blade material 100 includes the blade material 10
When 0 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 show an embodiment of the present invention .
1 shows a blade material feeder according to the present invention. In these figures, the structure of the connecting portion between the drive shaft 20 and the feed roller 30 is specifically shown.
Is shown in FIG. 19 is a partial sectional view of a connecting portion, and FIG.
0 is an enlarged sectional view of a main part of FIG. 19, and FIG.
It is sectional drawing which follows the I-XXI line.

In this connection portion, the end 24 of the drive shaft 20 and the end 36 of the feed roller 30 are disposed concentrically opposite to each other, and the end 36 of the feed roller 30 is provided.
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.

19 to 21, the upper and lower bearings 25, 37 attached to the same casing H are used.
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 blade member feeding accuracy of the blade member decreases due to the 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 shows another embodiment of the present invention.
FIG. 22 is a partially cutaway front view specifically showing another structure of a connecting portion between a drive shaft and a feed roller , showing a blade material feeding device according to an embodiment .

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.

[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 diagram for explaining 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 for explaining an initial state of a main part of the blade material feeding device according to the embodiment of the second 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 a resilient urging means of a feed roller according to the invention of claim 2 ;

FIG. 10 is an explanatory view illustrating another resilient urging means of the feed roller.

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

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

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

FIG. 14 is an explanatory view exemplifying yet another resilient urging means of the feed roller.

FIG. 15 is an explanatory view exemplifying still another resilient urging means of the 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 exemplifying a braking means according to the invention of claim 3 ;

FIG. 19 is a view showing an embodiment of the invention according to claims 4 to 6;
It is a fragmentary sectional view of the example of the structure of the connecting part of the drive shaft of a blade material feeder, 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 shows another embodiment of the present invention.
FIG. 6 is a partial cross-sectional view of another specific example of the structure of the connection portion between the drive shaft and the feed roller of the blade material feeder according to the present invention.

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 51 rib-shaped projection 52 rotation center shaft 53 bearing 54 key 60 recess 61 recessed wall surface 63 recess 64 recess Wall 65 of hole 91, 92, 93 Spring material (braking means) 100 Blade material

Claims (6)

(57) [Claims] 1. When the blade material 100 is pressed against the mold edge 12 and bent, the blade 100 is pulled out from the mold edge 12 and is rotated once at a rotation angle larger than an angle at which the feed roller 30 rotates forward. Drive shaft 20 whose forward rotation angle is controlled, and whether the drive shaft 20
And a feed roller 30 that contacts the blade member 100 and transmits a feed force generated by the forward rotation of the drive shaft 20 to the blade member. The feed roller 30 is pulled by the blade member 100 to At least the same rotation angle as the rotation angle allows the drive shaft 20 to idle in the forward direction with respect to the drive shaft 20, and
A key 50 is provided on the drive shaft 20, and the feed roller
30 has a recess 60 in which the key is fitted.
At the point 60, when the feed roller 30 is pulled by the blade material 100 and idles in the forward direction with respect to the drive shaft 20,
And separated by an amount commensurate with the idling angle to the idling direction from the key 50 and the wall 61 which transmits the forward rotation of the drive shaft 20 to the feed roller 30 is provided by being pushed by the key 50 A blade material feeding device for a blade material bending machine. 2. When the feed roller 30 is elastically urged in the reverse rotation direction, and the feed roller 30 is reversely rotated by the elastic force, the reverse rotation of the drive shaft 20 is disabled. A blade material feeding device for a blade material bending machine according to claim 1. 3. The blade of a blade bending machine according to claim 1, further comprising braking means for stopping the feed of the blade 100 against an external force in the feed direction applied to the blade 100. Material feeder. 4. When the blade material 100 is pressed against the mold edge 12 and bent, the blade 100 is drawn once from the mold edge 12 and is rotated once at a rotation angle larger than the forward rotation angle of the feed roller 30. A drive shaft 20 whose forward rotation angle is controlled; and a feed roller 30 that contacts the blade member 100 and transmits a feed force generated by the forward rotation of the drive shaft 20 to the blade member. However, at least the same rotation angle as the angle at which the blade member 100 is positively rotated by being pulled by the blade member 100 is allowed to idle in the forward direction with respect to the drive shaft 20, and
An engagement portion is provided at an end of the drive shaft 20, and the feed roller 30 is attached to an end of the feed roller 30 by the blade material 10.
When the drive shaft 20 is idled in the forward direction with respect to the drive shaft 20, the drive shaft 20 is separated from the engagement portion by an amount corresponding to the slip angle in the idle direction in the idle direction, and is pushed by the engagement portion to thereby drive the drive shaft 20. An engaged portion for transmitting the forward rotation of the roller 20 to the feed roller 30 is provided, and the end of the drive shaft 20 having the engaged portion and the end of the feed roller 30 having the engaged portion face each other. And deployed concentrically,
The engaging portion and the engaged portion are formed by a wall surface 64 of a groove-like recess 63 and a rib-like protrusion 51 fitted in the recess 63, and the rotation center axis 52 is formed on the protrusion 51 by the rotation center shaft 52. Depression
The hole 65 into which the rotation center shaft 52 is fitted is
And the rotation center shaft 52 is provided with a hole 65.
A blade material feeder for a blade material bending machine, which is slidably supported on the blade. 5. A bearing 53 is interposed between the rotation center shaft 52 and the hole wall of the hole 65.
5. The blade material feeding device for a blade material bending machine according to claim 4 , wherein the rotation center shaft 52 is rotatably supported by the hole portion 65 through the hole. 6. The blade material bending machine according to claim 5 , wherein an end of the feed roller 30 facing the end of the drive shaft 20 is rotatably supported by the housing H via a bearing 53. Blade material feeder.