JP2000158380A - Shearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shear a tube material at a right angle to the lengthwise direction without generating a burr and a chip. SOLUTION: A first cutting blade 21 has an inclined cutting edge 21a in a lower end part, and a pair of guide members 21b, 21c are formed at an interval slightly larger than a width of a cutting tube material on both ends of the cutting edge 21a. A second cutting blade 22 has a horizontal cutting edge 22a in an upper end part to thereby prevent lateral dislocation of the shearing time tube material by a small angle formed by both cutting edges 21a, 22a and the guide members 21b, 21c so as to sheare the tube material at an almost right angle to the lengthwise direction. The opposed surface 21d of the first cutting blade 21 is set on the same plane as the opposed surface 21e of the guide members 21b, 21c, and tip parts of the guide members 21b, 21c cross the second cutting blade 22. Since the cutting edges 21a, 22a are formed along the respective opposed surfaces 21d, 22b, a gap between both cutting edges 21a, 22a is eliminated, so that a burr and a chip by shearing can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing device for shearing a continuous flexible tube-shaped or band-shaped material to a predetermined length, and more particularly to a shearing device for cutting a material at right angles to a longitudinal direction and reducing burrs. The present invention relates to a shearing device capable of shearing without causing chipping.

[0002]

2. Description of the Related Art Conventionally, a continuous flexible hollow tube material has been used by being cut (cut) to a predetermined length by cutting blades 101 to 104 shown in FIGS. Specifically, in a state where the tube material to be cut is crushed into a flat plate shape, it is passed through a gap between a pair of cutting blades, and both or one of the cutting blades is slid to the other cutting blade side to intersect both cutting blades. The tube material was sheared.

[0003]

However, FIG.
When the tube material is sheared by the cutting blades 101 and 102 shown in FIG.
Since the tube material is laterally displaced in the direction of the arrow X due to the inclination of a, the tube material cannot be sheared at right angles to the length direction. As a result, when the tube material after cutting is returned to the cylindrical shape,
There is a problem that the cut surface becomes V-shaped.
A tube material having a V-shaped cut surface has a problem in use since bursting may occur from the V-shaped cut surface.

On the other hand, a cutting blade 103, 1 shown in FIG.
04, the cutting edge 103 of the cutting blade 103, 104
Since a and 104a are arranged parallel to each other (horizontally), lateral displacement of the tube material during shearing can be suppressed as compared with the cutting blades 101 and 102 in FIG. However, in this case, since the tube material is sheared at once in all the portions of the cutting blades 103a and 104a, the gap .gamma. There is a problem that burrs and chips are generated on the cut surface of the material, and the quality of the tube material after cutting is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and shears a tube-shaped or band-shaped material at right angles to a longitudinal direction and without generating burrs or chips. It is an object of the present invention to provide a shearing device that can perform the shearing.

[0006]

In order to achieve this object, a shearing device according to claim 1 is for shearing a tube-shaped or band-shaped material by a first cutting blade and a second cutting blade. The first cutting blade has a cutting edge inclined at a predetermined angle with respect to the material, the second cutting blade has a cutting edge substantially parallel to the material, The first cutting blade and the second cutting blade are arranged so that the opposing surfaces of the two cutting blades are in contact with each other in a state where the two cutting edges cross each other, and at least one of the first cutting blade and the second cutting blade. On one side, a guide member protruding toward the other cutting blade is formed so as to be flush with the opposing surface of the cutting edge, and the guide member allows the first cutting edge to be formed even when the two cutting edges are not intersecting. The blade and the second cutting blade are disposed so as to abut.

According to the first aspect of the present invention, the tube-shaped or band-shaped material is inserted into the gap between the first cutting blade and the second cutting blade, and at least one cutting blade is connected to the other cutting blade. The material is sheared (cut) by sliding the first cutting blade and the second cutting blade to cross each other. Here, the first cutting blade has a cutting edge inclined at a predetermined angle with respect to the material, and the second cutting blade has a cutting edge substantially parallel to the material. Therefore, as compared with the case where both cutting edges are inclined at a predetermined angle with respect to the material, the angle formed by both cutting edges is reduced, and the lateral displacement of the material during shearing is prevented accordingly. . In addition, since the cutting edges are not parallel and intersect at a predetermined angle, the shearing of the material is not performed in all parts of the cutting edge at once, but is performed gradually, and the load at the time of shearing is reduced. Further, the guide member formed on at least one of the first cutting blade and the second cutting blade is protruded toward the other cutting blade flush with the facing surface of the cutting blade, and the two cutting blades are non-intersecting. Also in the state, the first cutting blade and the second cutting blade are in contact with each other via the guide member. Therefore, the gap between the first and second cutting blades can be eliminated while preventing the collision between the first and second cutting blades, so that burrs or chips generated on the cut surface of the material due to the gap can be eliminated. Will be resolved.

According to a second aspect of the present invention, in the shearing apparatus of the first aspect, a pair of the guide members are provided at both ends of the cutting edge of the first cutting blade or the second cutting blade.
The interval between the pair of guide members is formed slightly larger than the width of the material. Therefore, even if the material attempts to shift laterally during shearing, the lateral shift is prevented by the guide member.

According to a third aspect of the present invention, in the shearing apparatus according to the first aspect, the guide member is provided at one end of the cutting edge of the first cutting blade and the other end of the cutting edge of the second cutting blade. Each is formed. Therefore, the distance between the guide members can be changed by adjusting the arrangement positions of the first and second cutting blades.

According to a fourth aspect of the present invention, in the shearing device according to any one of the first to third aspects, at least one of the first cutting blade and the second cutting blade faces the cutting surface. The opposing surface of the other portion is formed in a concave shape with respect to the opposing surface of the portion having the blade. Since the opposing surface formed in a concave shape does not abut on the opposing surface of the other cutting blade, the sliding area of both cutting blades during shearing is reduced accordingly, and the load during shearing is reduced.

According to a fifth aspect of the present invention, in the shearing apparatus of the fourth aspect, the guide member is formed on one of the first cutting blade and the second cutting blade, and the concave opposing surface is formed on the first cutting blade. It is formed on the other of the cutting blade and the second cutting blade. That is, the guide member and the concave facing surface are formed on separate cutting blades.

[0012]

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a shearing device 1 according to one embodiment of the present invention. The shearing device 1 is a device for shearing (cutting) a continuous flexible hollow tube material to a predetermined length. A supply drum 4 wound with a tube material 3 to be sheared (cut) is detachably and freely rotatably mounted on a lower part of a front surface of a main body 2 of the shearing device 1. A feed roller 5 is rotatably mounted on a shaft. A pair of disc-shaped guide plates 5a and 5b are fixed to both ends of the feed roller 5, and the conveying direction of the tube material 3 is adjusted by the guide plates 5a and 5b. On the downstream side of the feed roller 5, a first transport plate 6 having a hollow flat plate shape is fixed to the main body 2. Strip-shaped tube material 3 crushed into a flat plate
Is passed through the first transport plate 6 and sent to a pair of transport rollers 7 and 8.

The pair of transport rollers 7 and 8 are pivotally mounted on the front surface of the main body 2 and are synchronously rotated in opposite directions by a transport motor 37 (see FIG. 6) provided inside the main body 2. It is configured as follows. These transport rollers 7, 8
, The tube material 3 is transported in the direction of the arrow in FIG. A pair of sensor arms 9, 9 having six pairs of optical sensors 14 to 19 (see FIGS. 4 to 6) are provided downstream of the transport rollers 7, 8. Is further downstream of the second flat plate-shaped second transfer plate 10.
Are fixed to the main body 2. On the upstream side of the second transport plate 10, an open plate 10a (see FIG.
And FIG. 5), so that the tube material 3 sent out from the transport rollers 7 and 8 can easily enter the second transport plate 10.

A cutter box 11 is provided further downstream of the second transport plate 10, and a pair of cutting blades 21 and 22 are accommodated in the cutter box 11. The pair of cutting blades 21 and 22 are connected to the cutter box 11.
The upper first cutting blade 21 is arranged vertically by a cutter motor 39 (see FIG. 6).
It is configured to slide up and down to the cutting blade 22 side and the opposite second cutting blade 22 side. By the sliding operation of the first cutting blade 21 downward, the tube material 3 inserted into the gap between the two cutting blades 21 and 22 is sheared. In addition,
Details of the cutting blades 21 and 22 will be described later.

[0015] Below the downstream side of the cutter box 11,
A collection bag 12 detachably attached to the main body 2 is provided. The tube material 3 cut (sheared) by the cutting blades 21 and 22 in the cutter box 11 is collected in the collection bag 12 by natural fall. In addition, a buzzer 1 for issuing an alarm or the like at the time of an abnormality is provided on an upper front portion of the main body 2.
3 are provided. In addition, as an example at the time of abnormality, occurrence of jam of the tube material 3 being conveyed and the like can be cited.

Next, the cutting blades 21, 22 housed in the cutter box 11 will be described with reference to FIGS. 2A shows a front view of the pair of cutting blades 21 and 22 in a non-intersecting state, FIG. 2B shows a side view thereof, and FIG. FIG. 3B shows a front view of the pair of cutting blades 21 and 22 in a crossed state, and FIG. 3B shows a side view thereof.

As shown in FIGS. 2 and 3, the first cutting blade 21 disposed on the upper side has a cutting edge 21a inclined at an angle of about 5.5 ° at a lower end thereof. A pair of guide members 21b and 21c are formed at both ends of the cutting edge 21a. The second cutting blade 22 provided below the first cutting blade 21 has a horizontal cutting edge 22a at its upper end.
It has. Therefore, the angle between the two cutting edges 21a and 22a is relatively small, approximately 5.5 °. Furthermore, the interval between the guide members 21b and 21c of the first cutting blade 21 is set to be slightly larger than the width of the tube material 3 crushed in a band shape to be cut. Therefore, at the time of cutting (shearing), the lateral displacement of the tube material 3 in the direction of the arrow A, which is the inclination direction of the cutting edge 21a, is caused by the two cutting edges 21a, 22.
a and the guide members 21b and 21c
And is prevented by

Incidentally, the lateral displacement of the tube material 3 during the shearing is performed, for example, by changing the inner width of the second transport plate 10 to the tube material 3.
Can also be prevented by making the width substantially equal to the width of. However, in such a method, since the contact area between the tube member 3 and the inner surface of the second transport plate 10 increases, the feed resistance of the tube member 3 increases more than necessary. When the feed resistance increases, the tube material 3 is flexible, so that a normal feed pitch cannot be obtained, which causes a defective dimension of the tube material 3 after cutting. Therefore, in order to prevent the tube material 3 from contacting with the tube material 3 so as not to unnecessarily increase the feed resistance of the tube material 3 and to prevent the tube material 3 from being displaced during shearing, the first cutting blade 21 is cut. Guide members 21b and 21c are formed at both ends of the blade 21a.

The guide members 21b, 21c
May be formed on the second cutting blade 22 instead of the first cutting blade 21 or together with the first cutting blade 21. Further, one guide member may be formed at one end of the cutting edge of the first cutting blade 21, and the other guide member may be formed at the other end of the cutting edge of the second cutting blade 22. If a pair of guide members are formed one by one on the first cutting blade 21 and the second cutting blade 22 in this manner, the disposition positions of the two cutting blades 21 and 22 can be changed in the horizontal direction (arrow A in FIG. 2A). Direction)
The distance between the pair of guide members can be changed. Therefore, the distance between the pair of guide members can be changed according to the width of the tube material 3 to be cut.

The second cutting blade 2 of the first cutting blade 21
The opposing surface 21d formed on the second side includes a guide member 21b,
The guide members 21b and 21c are formed so as to be flush with the opposing surface 21e of the cutting blade 21c.
The first and second blades are configured to cross the second cutting blade 22 in a non-crossing state. Opposite surface 2 of second cutting blade 22
2b, the facing surfaces 21e of the guide members 21b and 21c when the cutting blades 21 and 22 shown in FIG.
When the cutting blades 21 and 22 shown in FIG.
1d. Cutting edge 21 of both cutting blades 21 and 22
a, 22a are formed along the opposing surfaces 21d, 22b, respectively, so that the opposing surfaces 21 of the two cutting blades 21, 22 are formed.
By disposing the two cutting blades 21 and 22 so that d (21e) and 22b are in contact with each other, as shown in FIG. 2B and FIG. 3B, between the two cutting blades 21a and 22a. Gap can be eliminated.

As shown in FIGS. 2B and 3B, the second cutting blade 22 has a length α with respect to the facing surface 22b formed at the cutting blade 22a. An opposing surface 22c formed in a concave shape toward the anti-first cutting blade 21 is formed. Therefore, as shown in FIG. 3B, the area of contact between the opposing surfaces 21d (21e) and 22b during shearing,
That is, the load at the time of shearing can be reduced by reducing the sliding area. In this embodiment, the length α is set to 50 microns.

Next, with reference to FIGS. 4 and 5, the six pairs of optical sensors 14 to 19 mounted on the sensor arms 9, 9 will be described. The optical sensors 14 to 19 are sensors for detecting a jam of the tube material 3 during transport. FIG. 4 is an enlarged perspective view of the upstream side of the second transport plate 10, that is, the sensor arms 9, 9, and FIG. 5 is an enlarged side view of the sensor arms 9, 9. In FIG. 4, the transport rollers 7 and 8 are omitted for easy understanding.

As shown in FIG. 4, between a pair of open plates 10a provided on the upstream side of the second transport plate 10,
6 pairs of optical sensors 14 mounted on the sensor arms 9, 9
19 are provided. Each of the optical sensors 14 to 19 is an amplifier-separated optical sensor that is low-cost and easy to remove. Of the six pairs of optical sensors 14 to 19, three pairs of optical sensors 14 to 16 are located above the conveyed tube material 3,
The remaining three pairs of optical sensors 17 to 19 are disposed below the tube member 3. Therefore, these six pairs of optical sensors 14
19 to 19 allow the jam of the tube material 3 to be detected.

Each of the optical sensors 14 to 19 includes a light emitting portion 14a to 14
A pair is constituted by 19a and light receiving sections 14b to 19b. The light emitting units 14a to 19a and the light receiving units 14b to 19
b are alternately arranged as shown in FIG. 5 in order to avoid the problem of erroneous detection due to diffused light. The optical sensors 14 to 19 used in the present embodiment are low-cost, easy-to-remove amplifier-separated optical sensors as described above. Therefore, the light emitted from the light emitting units 14a to 19a is largely scattered as compared with a laser sensor having a high cost but a small spot light diameter. If the scattered light from the light emitting units 14a to 19a is large, the light from the light emitting unit may be received by a light receiving unit that is not paired with the light emitting unit. In such a case, erroneous detection occurs. In the present embodiment, as a first measure for preventing such erroneous detection, the light emitting units 14a to 19a and the light receiving units 14b to 19b are used in order to increase the distance between the unpaired light emitting unit and the light receiving unit. Are alternately arranged.

In this embodiment, the light receiving sections 14b to 19b
b as a second measure for preventing erroneous detection due to
The frequency of the light emitted from 4a to 19a is different for each light emitting unit. Specifically, three light emitting units (14a, 16a, 1) mounted on the sensor arm 9 on the same side
The frequencies 8a) and (15a, 17a, 19a) are three different frequencies. Thereby, even when light from the light emitting unit that is not paired is received by the light receiving unit due to the diffused light, erroneous detection can be prevented.

Further, as a third measure for preventing erroneous detection, the intensity of the light emitted from the light emitting portions 14a to 19a is determined as follows.
The light receiving units that are not paired cannot receive light, but are adjusted so that only the light receiving units 14b to 19b that are paired can receive light. That is, the intensity of the light emitted from the light emitting units 14a to 19a is adjusted so that only the linear light of the light emitted from the light emitting units 14a to 19a can be received (recognized) by the light receiving units 14b to 19b. I have.

As described above, in this embodiment, the first to third measures are taken as measures for preventing erroneous detection by the light receiving sections 14b to 19b. However, it is not always necessary to take all three measures, and any one or two measures may be taken. Also, the optical sensors 14 to 19 need not always be provided in six pairs, but may be provided in pairs on the upper side and the lower side of the tube material 3 to be conveyed. In this case, the tube material 3
One light emitting part and one light receiving part of the optical sensor are mounted on each sensor arm 9 so that the light emitting direction of the optical sensor is reversed between the upper side and the lower side.

Next, with reference to FIGS. 5A to 5C, detection of a jam of the tube member 3 by the optical sensors 14 to 19 will be described. If a jam occurs during the transfer of the tube material 3, the tube material 3 is cut into a predetermined size (shear).
Can not do it. Therefore, such a jam is detected by the optical sensors 14 to 19.

FIG. 5A shows a state in which the tube material 3 is normally conveyed. In this case, the light emitting portions 14b to 19b of all the six pairs of optical sensors 14 to 19 emit light. Light emitted from 14a to 19a is received. On the other hand, FIGS. 5B and 5C show a state in which a jam has occurred in the tube material 3 being conveyed. FIG.
In the case of (b), the light emitted from the light emitting unit 15a cannot be received by the light receiving unit 15b, and FIG.
In this case, the light emitted from the light emitting units 14a and 19a cannot be received by the light receiving units 14b and 19b. As described above, when light receiving failure occurs in any of the six pairs of optical sensors 14 to 19, it is determined that a jam has occurred in the transport of the tube material 3.

Next, the electrical configuration of the shearing device 1 will be described with reference to FIG. FIG. 6 is a block diagram showing an electrical configuration of the control unit C of the shearing device 1. The control unit C of the shearing device 1 includes a CPU 31 as an arithmetic device and the CPU 31
And a RAM 33 used as a work memory and the like. The program of the flowchart shown in FIG.
It is stored in the OM32.

The CPU 31, the ROM 32, and the RAM 33
They are interconnected via a bus line 34. The bus line 34 is also connected to an input / output port 35. The input / output port 35 has two driver circuits 3
6, 38, six pairs of optical sensors 14 to 19, and buzzer 13
And are connected.

The driver circuit 36 is a circuit for driving the transport motor 37 based on a signal output from the CPU 31 via the input / output port 35. When the transport motor 37 is driven by the driver circuit 36, the transport rollers 7, 8 rotate, and the tube material 3 is transported in the direction of the arrow in FIG. The driver circuit 38 is a circuit for driving the cutter motor 39 based on a signal output from the CPU 31 via the input / output port 35. When the cutter motor 39 is driven by the driver circuit 38, the cutter box 1
The first cutting blade 21 disposed on the upper side in 1 moves up and down,
Shearing (cutting) of the tube material 3 is performed. Buzzer 13
Is for notifying an abnormality or the like that has occurred in the shearing device 1. For example, a jam occurs while the tube member 3 is being conveyed, and is sounded when any of the optical sensors 14 to 19 detects this. .

Next, referring to the flowchart of FIG.
The shearing process of the tube material 3 performed by the control unit C of the shearing device 1 will be described. In this shearing process, first, the transport motor 37 is driven via the driver circuit 36 to start rotating the transport rollers 7 and 8 (S1). Optical sensor 14
It is checked whether or not any of the optical sensors 14-19 is abnormal (S2). If all the optical sensors 14-19 are normal (S2: N)
o), it is determined whether or not the transport rollers 7, 8 have rotated a predetermined amount (S3). If the rotation amount of the transport rollers 7 and 8 has not reached the predetermined amount (S3: No), the transport amount of the tube material 3 is also less than the predetermined size.
The process proceeds to S2, and the checks of the optical sensors 14 to 19 are repeated (S2). If there is no abnormality in all the optical sensors 14 to 19 (S2: No) and the transport rollers 7, 8 have rotated a predetermined amount (S3: Yes), the tube material 3 has been transported to a predetermined dimension, and the transport motor The drive of the transport roller 37 is stopped, and the rotation of the transport rollers 7, 8 is stopped (S4).

Thereafter, the cutter motor 39 is driven via the driver circuit 38, and the first cutting blade 21 is moved up and down with respect to the second cutting blade 22 to perform the cutter operation (S5). By this cutter operation, the tube material 3 is sheared (cut) to a predetermined size. Tube material 3 after cutting
Is collected into the collection bag 12 by natural fall. After the cutter operation (S5), the process shifts to S1, and the processes from S1 to S5 are repeated.

On the other hand, if any of the optical sensors 14 to 19 becomes abnormal in the process of S2 (S2: Ye
s) A jam has occurred in the tube material 3 being conveyed. Therefore, in this case, the transport motor 37
Is stopped, and the rotation of the transport rollers 7, 8 is stopped (S6). Then, the buzzer 13 sounds (S7) to notify the occurrence of the jam. In this way, if a jam occurs in the tube material 3 being conveyed, the shearing process is stopped to prevent the poorly dimensioned tube material 3 from being mixed into the collection bag 12.

As described above, according to the shearing device 1 of the present embodiment, the lateral displacement of the tube member 3 during the shearing can be prevented, so that the tube member 3 is sheared substantially perpendicularly in the longitudinal direction ( Cutting). This allows
Even if the tube material 3 after cutting is returned to a cylindrical shape, the cut surface becomes V
It is possible to solve the problem of the character shape. Further, since the first cutting blade 21 and the second cutting blade 22 can be arranged without a gap between the cutting blades 21a, 22a, a flexible tube can be formed without causing burrs or chips on a cutting (shearing) surface. The material 3 can be sheared.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the gist of the present invention. Can easily be inferred.

[0038]

According to the shearing device of the first aspect, the first cutting blade has a cutting edge inclined at a predetermined angle with respect to the material, and the second cutting blade is substantially parallel to the material. It has a sharp cutting edge. Therefore, the angle formed by both cutting edges can be made smaller than when both cutting edges are inclined at a predetermined angle with respect to the material. Therefore, there is an effect that the material can be sheared (cut) substantially perpendicularly to the length direction by preventing the material from being laterally displaced during shearing.
Thereby, even if the tube material after cutting is returned to the cylindrical shape,
The disadvantage that the cut surface becomes V-shaped can be solved.

Also, since the cutting edges are not parallel and intersect at a predetermined angle, the shearing of the material is not performed at once in all parts of the cutting edges but is performed gradually. Therefore, since the load at the time of shearing can be reduced, not only the first cutting blade and the second cutting blade but also the durability of the shearing device itself can be improved. In addition, since the minimum torque required for the driving mechanism for driving the first cutting blade or the second cutting blade is reduced, there is an effect that the manufacturing cost of the shearing device can be reduced accordingly.

Further, the guide member formed on at least one of the first cutting blade and the second cutting blade is protruded toward the other cutting blade flush with the facing surface of the cutting blade. Even in a non-crossing state, the first cutting blade and the second cutting blade are in contact with each other via the guide member. Therefore, the first
Since the gap between the two cutting edges can be eliminated while preventing the collision between the cutting edges of the cutting edge and the second cutting edge, burrs and chips generated on the cut surface of the material due to the gap are eliminated. There is an effect that the quality of the material after cutting can be maintained.

According to the shearing device of the second aspect, in addition to the effect of the shearing device of the first aspect, further, the guide member is provided with a pair of both ends of the cutting edge of the first cutting blade or the second cutting blade. The pair of guide members has an effect that lateral displacement of the material during shearing can be more effectively prevented because the gap is provided slightly larger than the width of the material.

According to the shearing device of the third aspect, in addition to the effect of the shearing device of the first aspect, the guide member further includes one end of the cutting edge of the first cutting blade and the cutting edge of the second cutting blade. Are formed at the other end of the cutting blade, so that the distance between the guide members can be changed by adjusting the arrangement positions of both cutting blades. Therefore, there is an effect that the interval between the guide members can be changed according to the width of the material to be cut.

According to the shearing device of the fourth aspect, in addition to the effect of the shearing device of the first aspect, at least one of the first cutting blade and the second cutting blade. Is formed such that the opposing surface of the other portion is concave with respect to the opposing surface of the portion having the cutting edge. Since the opposing surface formed in a concave shape does not contact the opposing surface of the other cutting blade, the sliding area of both cutting blades at the time of shearing can be reduced accordingly, and the load at the time of shearing can be reduced. This has the effect.

According to the shearing device of the fifth aspect, in addition to the effect of the shearing device of the fourth aspect, the guide member and the concave facing surface are formed on separate cutting blades. There is an effect that the sliding area between the guide member and the opposing surface of the cutting blade during shearing can be reduced, and the load during shearing can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shearing device according to an embodiment of the present invention.

FIG. 2A is a front view of a pair of cutting blades in a non-intersecting state, and FIG. 2B is a side view thereof.

FIG. 3A is a front view of a pair of cutting blades in an intersecting state, and FIG. 3B is a side view thereof.

FIG. 4 is an enlarged perspective view of a sensor arm portion of the shearing device.

FIG. 5 is an enlarged side view of a sensor arm portion of the shearing device, wherein (a) illustrates a normal state;
(B) and (c) have shown the state where jam occurred in conveyance of the tube material.

FIG. 6 is a block diagram showing an electrical configuration of a control unit of the shearing device.

FIG. 7 is a flowchart showing a shearing process.

FIG. 8A is a front view showing a cutting blade according to the related art, and FIG. 8B is a side view thereof.

FIG. 9A is a front view showing a cutting blade according to another conventional technique, and FIG. 9B is a side view thereof.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 shearing device 3 tube material (material) 21 first cutting blade 21a cutting blade 21b, 21c guide member 21d opposing surface of first cutting blade 21e opposing surface of guide member 22 second cutting blade 22a cutting edge 22b opposing surface (cut) 22c opposing surface (concave opposing surface)

Claims (5)

[Claims] 1. A shearing device for shearing a tube-shaped or band-shaped material by a first cutting blade and a second cutting blade, wherein the first cutting blade is inclined at a predetermined angle with respect to the material. And the second cutting blade has a cutting edge that is substantially parallel to the material. The first cutting blade and the second cutting blade have both cutting edges in a state where the cutting edges cross each other. At least one of the first and second cutting blades is disposed so that the opposing surfaces of the cutting edges are in contact with each other, and projects toward the other cutting blade flush with the opposing surface of the cutting edge. Wherein the first cutting blade and the second cutting blade are arranged so as to be in contact with each other even when the two cutting edges do not intersect. apparatus. 2. A pair of guide members are provided at both ends of a cutting blade of the first cutting blade or the second cutting blade, and a distance between the pair of guide members is formed to be slightly larger than a width of the material. The shearing device according to claim 1, wherein the shearing device is provided. 3. The shearing member according to claim 1, wherein the guide member is formed at one end of the cutting edge of the first cutting blade and at the other end of the cutting edge of the second cutting blade. apparatus. 4. A facing surface of at least one of the first and second cutting blades is formed such that a facing surface of another portion is concave with respect to a facing surface of a portion having the cutting blade. The shearing device according to any one of claims 1 to 3, wherein the shearing device is provided. 5. The method according to claim 5, wherein the guide member is formed on one of the first cutting blade and the second cutting blade, and the concave facing surface is formed on the other of the first cutting blade and the second cutting blade. The shearing device according to claim 4, wherein