Cutting device, clearance adjustment method for cutting device, and manufacturing method for metal plate

Abstract

To provide a cutting device and a method for adjusting clearance of a cutting device which enable highly accurate adjustment of clearances between cutting blades, formed when the cutting blades are engaged with each other, and enable the cutting blades to be stably fixed to desired positions, and a method for manufacturing a metal plate.SOLUTION: A cutting device is provided, cutting cutting-target object material with a pair of cutting blades constituted of a first cutting blade and a second cutting blade which moves in a cutting direction toward the first cutting blade, the cutting device comprises a clearance adjustment mechanism which adjusts clearance generated when the first cutting blade and the second blade are engaged with each other, by moving the first cutting blade or the second cutting blade in an adjusting direction orthogonal to the cutting direction, by clearance adjustment based on a rotation angle of a rotary driving mechanism.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cutting device that cuts a metal plate (an example of a material to be cut) such as a steel plate using a pair of blades, a clearance adjustment method for the cutting device, and a method for manufacturing a metal plate. [Background technology]

[0002] Conventionally, cutting devices such as shear cutters are used to cut metal plates such as steel plates. The shear cutters are equipped with a pair of blades, that is, a first blade and a second blade. The shear cutters fix one of the pair of blades and move the other blade toward the first blade to cut the metal plate between the first blade and the second blade.

[0003] The shear cutting machine has a clearance adjustment mechanism that adjusts the clearance (the distance between the first blade and the second blade) when the first blade and the second blade are engaged with each other, depending on the thickness of the metal plate to be cut.

[0004] A known clearance adjustment mechanism is one in which a blade holder that holds blades (first blade and second blade) has a sloped surface formed on a member that contacts the blade holder. In this mechanism, the blade holder and blades are moved by sliding these sloped surfaces against each other while in contact with each other, thereby adjusting the clearance.

[0005] Patent document 1 discloses a clearance adjustment device in which inclined surfaces are provided on a wedge piece and a lower blade holder, and the inclined surfaces are brought into contact with each other and slid along the inclined surfaces, thereby moving the lower blade holder forward and backward to adjust the clearance between the blades.

[0006] Patent Document 2 discloses a clearance adjustment structure in which inclined surfaces are formed on a fixed cotter and an upper blade holder, and the upper blade holder is moved along the inclined surface of the fixed cotter, thereby adjusting the clearance between the blades. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 62-004507 [Patent Document 2] Japanese Patent Application Publication No. 08-276313 Summary of the Invention [Problem to be solved by the invention]

[0008] However, the configurations disclosed in Patent Documents 1 and 2 have a problem in that it is not easy to fix the blade holder via the inclined surface (slope) after the clearance adjustment. Even if the blade holder is fixed after the clearance adjustment, it is difficult to stably fix the blade holder at a desired position because it is fixed via the inclined surface (slope), and there is a problem in that it is difficult to adjust the position of the blade (blade holder) with high precision.

[0009] The present invention has been made in consideration of the above circumstances, and aims to provide a cutting device that can easily and precisely adjust the clearance when the blades mesh and can stably fix the blades in the desired position, a clearance adjustment method for the cutting device, and a method for manufacturing metal plates. [Means for solving the problem]

[0010] The gist and configuration of the present invention to solve the above problems are as follows. [1] A cutting device that cuts a material to be cut with a pair of blades consisting of a first blade and a second blade that moves in a cutting direction toward the first blade, the cutting device having a clearance adjustment mechanism that adjusts the clearance when the first blade and the second blade mesh together by moving the first blade or the second blade in an adjustment direction perpendicular to the cutting direction using a clearance adjustment amount based on the rotation angle of a rotation drive mechanism. [2] The cutting device according to [1], wherein the clearance adjustment mechanism is provided in a first blade holder having the first blade or a second blade holder having the second blade. [3] The cutting device described in [2], wherein the clearance adjustment mechanism includes a pressed member fixed to the first blade holder or the second blade holder and having a pair of pressed parts spaced apart from each other in the adjustment direction, and a rotating rod arranged between the pair of pressed parts, extending in a direction perpendicular to the cutting direction and the adjustment direction, and receiving a rotational driving force from the rotation drive mechanism, and a pressing member disposed around the rotating rod presses one of the pair of pressed parts by rotation of the rotating rod, thereby moving the first blade holder or the second blade holder together with the pair of pressed parts in the adjustment direction. [4] The cutting device according to [3], wherein the pressing member has an elliptical cross-sectional shape and rotates relative to the pressed member by rotation of the rotating rod due to the rotational driving force. [5] The cutting device described in [3] or [4], wherein the pressed member is a rectangular frame member arranged to surround the rotating rod and the pressing member, and the pair of pressed portions are a pair of opposing inner surfaces of the frame member. [6] The cutting device according to any one of [3] to [5], wherein a plurality of the pressed members are provided along the rotation axis direction of the rotating rod. [7] A clearance adjustment method for adjusting a clearance when the first blade and the second blade are engaged, using the cutting device described in any one of [3] to [6], comprising the steps of: rotating the rotating rod with the rotational driving force; pressing the pressing member provided around the rotating rod against one of a pair of pressed parts by the rotation of the rotating rod; and moving the first blade holder or the second blade holder together with the pair of pressed parts in the adjustment direction by the pressing of the pressing member. [8] A method for manufacturing a metal plate, comprising adjusting the clearance of the first blade or the second blade using the method for adjusting the clearance of a cutting device described in [7] to cut the metal plate. Effect of the Invention

[0011] According to the present invention, the clearance when the blades mesh with each other can be easily and accurately adjusted, and the blades can be stably fixed in desired positions. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a schematic perspective view showing an example of a cutting device. [Diagram 2] 1A and 1B are a front view and a side view showing an example of a cutting device. [Diagram 3] FIG. 2 is a schematic front view of a pressed member and a pressing member. [Figure 4] 13 is a diagram showing a state in which a pressing member has rotated relative to a pressed member; FIG. [Diagram 5] 13A and 13B are diagrams showing modified examples of a pressed member and a pressing member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention will be described below through the embodiments of the present invention. Here, the configuration of a cutting device 10 according to one embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 shows a schematic perspective view of the cutting device 10.

[0014] <Cutting device configuration> As shown in Fig. 1, the cutting device 10 has a lower blade holder 1, an upper blade holder 2, and a clearance adjustment mechanism 3. The lower blade holder 1 has a lower blade 1a. The upper blade holder 2 has an upper blade 2a. The upper blade holder 2 is rectangular in plan view. The lower blade holder 1 has a rectangular cutout that engages with the rectangular upper blade holder 2.

[0015] The cutting device 10 cuts a material to be cut (not shown), such as a metal plate, positioned between the upper blade holder 2 and the lower blade holder 1, by moving the upper blade holder 2 in a cutting direction (arrow M in the figure) toward the lower blade holder 1 and engaging the rectangular upper blade holder 2 with a rectangular cutout portion of the lower blade holder 1. The lower blade holder 1 may also be configured to be movable in the cutting direction M so that it can be finely adjusted.

[0016] An upper blade 2a is fixed or formed in the upper blade holder 2 at a position where it engages with a rectangular cutout of the lower blade holder 1. Similarly, a lower blade 1a is fixed or formed in the lower blade holder 1 at a position where it engages with a rectangular cutout of the upper blade holder 2. In other words, the cutting device 10 has a pair of blades (lower blade 1a and upper blade 2a). The cutting device 10 moves the upper blade 2a in a cutting direction M, which is a direction toward the lower blade 1a, to cut a cutting target material located between the upper blade 2a and the lower blade 1a.

[0017] Although the cutting device 10 shown in FIG. 1 is configured to move the upper blade holder 2 toward the lower blade holder 1, the lower blade holder 1 may also be moved toward the upper blade holder 2 to cut the material to be cut that is located between the upper blade holder 2 and the lower blade holder 1.

[0018] In Fig. 1, the upper blade holder 2 is rectangular, but it may be a shape other than a rectangle, such as a semicircular shape in a plan view. In order to match the upper blade holder 2, which is semicircular in a plan view, the rectangular cutout formed in the lower blade holder 1 may also be a semicircular cutout. In this case, the cutting device 10 has the upper blade holder 2, which is semicircular in a plan view, and the lower blade holder 1, which is provided with a semicircular cutout, so that an arc-shaped cutout may be formed at the width end of the material to be cut, such as a metal plate, located between the upper blade holder 2 and the lower blade holder 1.

[0019] <Clearance adjustment mechanism> Next, the configuration of a clearance adjustment mechanism 3 according to one embodiment of the present invention will be described with reference to Fig. 1 and Fig. 2. Fig. 2(a) shows a schematic front view of a cutting device 10. Fig. 2(b) shows a schematic side view of the cutting device 10. Note that a rotation drive mechanism 6, which will be described later, is omitted in Fig. 1.

[0020] 1 and 2, the clearance adjustment mechanism 3 has a pressed member 4 which is a frame member, a rotating rod 5, and a rotation drive mechanism 6. As described below, the clearance adjustment mechanism 3 moves the pressed member 4 and the lower blade holder 1 (lower blade 1a) in an adjustment direction (arrow N in the figure) perpendicular to the cutting direction M by driving the rotation drive mechanism 6 and rotating the rotating rod 5 in order to adjust the clearance of the cutting device 10.

[0021] The pressed member 4 has a pair of opposing pressed portions 4a arranged at a distance from each other in the adjustment direction N as an inner surface of a frame member. The pressed member 4 is fixed to the surface of the lower blade holder 1. The rotating rod 5 has a pressing member 5a having an elliptical cross-sectional shape around its periphery. The rotation drive mechanism 6 has a rotation drive source 6a such as a motor, a rotation drive transmission portion 6b, a pulley 6c, and a chain 6d.

[0022] The rotating rod 5 is engaged with the chain 6d to receive a rotational driving force from the chain 6d. The rotating rod 5, together with the pressing member 5a around it, is disposed between a pair of pressed portions 4a of the pressed member 4, which is a frame member, so as to be surrounded by the frame member. As shown in Fig. 1, the rotating rod 5 extends in a direction (rotation axis direction P) perpendicular to the cutting direction M and the adjustment direction N. As shown in Fig. 1, a plurality of pressed members 4 (two in Fig. 1) are provided along the rotation axis direction P of the rotating rod 5.

[0023] The rotary drive mechanism 6 transmits the rotary drive force generated by the rotary drive source 6a to the pulley 6c via the rotary drive transmission unit 6b. The rotary drive mechanism 6 transmits the rotary drive force of the pulley 6c to the rotary rod 5 via a chain 6d. The rotary rod 5 rotates itself in the rotation direction A (see FIG. 2(a)) based on the rotary drive force obtained via the chain 6d, and also rotates the pressing member 5a around it. The rotary rod 5 rotates the pressing member 5a, thereby pressing one of the pair of pressed parts 4a of the pressed member 4. The pressed part 4a moves together with the lower blade holder 1 (lower blade 1a) in the direction of the pressing force from the pressing member 5a (adjustment direction N). In addition, the rotational drive mechanism 6 may be configured not to include the rotational drive transmission part 6b, the pulley 6c, and the chain 6d, but to connect the rotational drive source 6a to the rotating rod 5 and transmit the rotational drive force generated by the rotational drive source 6a directly to the rotating rod 5.

[0024] <Configuration of Pressed Member and Pressing Member> Next, the configuration of the pressed member 4 and pressing member 5a according to one embodiment of the present invention will be described with reference to Fig. 3. Fig. 3 shows a schematic front view of the pressed member 4 and pressing member 5a. As shown in Fig. 3, the pressed member 4 is fixed to the surface of the lower blade holder 1. The rotating rod 5 extends inside the frame-shaped pressed member 4 together with the pressing member 5a around it.

[0025] The rotating rod 5 rotates the pressing member 5a, which has an elliptical cross-sectional shape, relative to the pressed member 4 in the rotation direction A1 as shown by the dotted line in FIG. 3 due to the rotational driving force received via the chain 6d (see FIG. 2(a)). Then, as the amount of rotation of the pressing member 5a increases, the pressing member 5a comes into contact with one of the pair of pressed portions 4a, and this contact becomes a pressing force against the pressed portion 4a. Thereafter, the pressing force applied to the pressed portion 4a becomes a moving driving force in the adjustment direction N of the pressed member 4 having the pressed portion 4a. The pressed member 4 moves in the adjustment direction N together with the lower blade holder 1 due to the moving driving force.

[0026] Now, with reference to Fig. 4, the movement of the pressed member 4 caused by the rotation of the pressing member 5a will be described in detail. Figs. 4(a) and 4(b) show a state in which the pressing member 5a has rotated in the opposite direction relative to the pressed member 4. In Figs. 4(a) and 4(b), the left side of the drawing is a first direction in which the pressed member 4 and the lower blade holder 1 can move, and the right side of the drawing is a second direction in which the pressed member 4 and the lower blade holder 1 can move. The first and second directions correspond to the adjustment direction N shown in Fig. 1.

[0027] Fig. 4(a) shows a state in which the pressing member 5a has rotated in the rotation direction A2. Fig. 4(a) shows a state in which the rotating rod 5 has been rotated in the rotation direction A2, thereby causing the pressing member 5a to rotate in the same direction. Here, in the embodiment shown in Fig. 4(a), the distance from the rotation center O of the rotating rod 5 to the outermost edge B of the pressing member 5a is 24.5 mm. The distance between the other edge C of the pressing member 5a, which is located on the extension line of the straight line connecting the outermost edge B and the rotation center O, and the rotation center O is 24 mm.

[0028] Fig. 4(b) shows a state in which the pressing member 5a has rotated in the rotation direction A1. Fig. 4(b) shows a state in which the rotating rod 5 has been rotated in the rotation direction A1, thereby rotating the pressing member 5a in the same direction. Fig. 4(b) shows a state in which the outermost edge B and the other edge C are reversed in direction in the adjustment direction N compared to Fig. 4(a). Specifically, the state shown in Fig. 4(b) shows a state in which the pressed member 4 has been moved 0.5 mm in the second direction compared to the state shown in Fig. 4(a).

[0029] Here, a case where the clearance adjustment amount for adjusting the clearance from the state shown in FIG. 4(a) toward the second direction in the adjustment direction N is set to 0.5 mm will be described below.

[0030] In the state shown in FIG. 4(a), a rotational driving force for rotating the rotation direction A1 of the rotation drive mechanism 6 (see FIG. 2(b)) to 180° is transmitted to the pressing member 5a via the rotating rod 5, thereby rotating the pressing member 5a 180° in the same direction. The pressed member 4 can then be moved 0.5 mm in the second direction in the adjustment direction N by the pressing member 5a. As a result, the lower blade holder 1 (see FIG. 3) to which the pressed member 4 is fixed can also be moved 0.5 mm in the second direction in the adjustment direction N. Therefore, the pressed member 4 and the lower blade holder 1 (lower blade 1a) can be moved toward the adjustment direction N by the clearance adjustment amount based on the rotation angle of the rotation drive mechanism 6.

[0031] 4(a) and 4(b), for the cross-sectional shapes of the rotating rod 5 and the pressing member 5a, the rotation center O of the rotating rod 5, the outermost edge B based on the rotation center O, and the other edge C of the pressing member 5a located on the extension line of the straight line connecting the outermost edge B and the rotation center O are determined in advance. Then, the distance between the rotation center O and the outermost edge B, and the distance between the rotation center O and the other edge C are set, and the difference between these distances (0.5 mm in this embodiment) is set as the maximum clearance adjustment amount.

[0032] During clearance adjustment in the cutting device 10, the clearance can be adjusted within the range of the maximum clearance adjustment amount by moving the lower blade holder 1 and the lower blade 1a a desired distance in the adjustment direction N. In other words, by setting in advance the distance of movement in the adjustment direction N required for clearance adjustment, the clearance can be adjusted easily and with high precision.

[0033] In addition, after rotating the rotating rod 5, the rotation of the rotating rod 5 can be fixed by operating a brake or the like on the rotation drive source 6a such as a motor, thereby stably fixing the lower blade holder 1 and the lower blade 1a in the desired position.

[0034] Furthermore, when changing from the state shown in FIG. 4(b) to the state shown in FIG. 4(a), in the state shown in FIG. 4(b), a rotational driving force for rotating the rotation direction A2 in the rotation driving mechanism 6 (see FIG. 2(b)) by 180° is transmitted to the pressing member 5a via the rotating rod 5, thereby rotating the pressing member 5a by 180° in the same direction. Then, the pressed member 4 and the lower blade holder 1 can be moved by 0.5 mm in the first direction in the adjustment direction N by the pressing member 5a. Therefore, in order to adjust the clearance, the lower blade holder 1 and the lower blade 1a can be moved easily and with high precision in either the first direction or the second direction in the adjustment direction N.

[0035] 4(a) and 4(b), the rotation angles of the rotation directions A1 and A2 in the rotary drive mechanism 6 are 180°, but the rotation angles are not limited to 180°. In other words, the rotation angles of the rotation directions A1 and A2 can be set more finely, and the lower blade holder 1 and the lower blade 1a can be moved easily and accurately in the adjustment direction N for each fine rotation angle by the rotary drive mechanism 6.

[0036] <Modifications of the Pressed Member and the Pressing Member> Next, modified examples of the pressed member 4 and the pressing member 5a will be described with reference to Fig. 5. Fig. 5(a) shows a schematic front view of a pressed member 41 configured as a pair of wall-like protrusions as a modified example of the pressed member 4 in the previous embodiment. Fig. 5(b) shows a schematic front view of a pressed member 42 configured as a recess formed in the lower blade holder 1 as a modified example of the pressed member 4 in the previous embodiment. Figs. 5(a) and 5(b) also show a modified example of the pressing member 5a in the previous embodiment in which a circular member 5b is provided on the surface of the rotating rod 5 and a protruding pressing member 5c is provided on the surface of the circular member 5b around the rotating rod 5.

[0037] As shown in Fig. 5(a), the pressed member 4 according to the present invention may be a pressed member 41 configured as a pair of wall-like projections. In this case, the pressing member 5a may be configured as a single pressing member 5c provided on the surface of the rotating rod 5 via a circular member 5b. By rotating the circular member 5b and the pressing member 5c in the rotation direction A1 of Fig. 5(a), the pressing member 5c presses one of the pressed parts 41a, which are the inner surfaces of the pair of wall-like projections (pressed member 41), and the lower blade holder 1 and the lower blade 1a can be moved in the adjustment direction N.

[0038] As shown in Fig. 5(b), the pressed member 4 according to the present invention may be a pressed member 42 configured as a recess formed in the lower blade holder 1. In this case, the pressing member 5a may be configured as a plurality of pressing members 5c (two in Fig. 5(b)) provided on the surface of the rotating rod 5 via a circular member 5b. By rotating the circular member 5b and the pressing member 5c in the rotation direction A1 in Fig. 5(b), the tip of the pressing member 5c presses one of the pressed parts 42a, which is the inner surface of the recess (pressed member 42), and the lower blade holder 1 and the lower blade 1a can be moved in the adjustment direction N.

[0039] 5(a) and 5(b), the tip of the pressing member 5c may be set as the outermost edge B with the rotation center O of the rotating rod 5 as the reference. Also, a position on the circumference of the circular member 5b located on an extension of a straight line connecting the outermost edge B and the rotation center O may be set as the other other edge C. Then, the distance between the rotation center O and the outermost edge B, and the distance between the rotation center O and the other other edge C may be set, and the difference between these distances may be set as the maximum clearance adjustment amount.

[0040] As a result, when adjusting the clearance in the cutting device 10, the lower blade holder 1 and the lower blade 1a are moved a desired distance in the adjustment direction N, making it possible to adjust the clearance within the range of the maximum clearance adjustment amount. In other words, by setting in advance the distance of movement in the adjustment direction N required for clearance adjustment, the clearance can be adjusted easily and with high precision. In addition, by fixing the rotation of the rotating rod 5 after rotating the rotating rod 5, the lower blade holder 1 and the lower blade 1a can be stably fixed at the desired position.

[0041] <Clearance adjustment method> A clearance adjustment method for the cutting device 10 according to one embodiment of the present invention will now be described. The clearance adjustment method for the cutting device 10 first includes a step of rotating the rotating rod 5 by a rotational driving force generated by the rotation drive mechanism 6. Next, the method includes a step of pressing a pressing member 5a (5c) provided around the rotating rod 5 toward one of the pair of pressed portions 4a (41a, 42a) by the rotation of the rotating rod 5. Thereafter, the method includes a step of moving the lower blade holder 1 together with the pair of pressed portions 4a (41a, 42a) in the adjustment direction N by the pressing of the pressing member 5a (5c).

[0042] Furthermore, in the present invention, as a method for manufacturing a metal plate, a clearance adjustment method for the cutting device 10 may be used to adjust the clearance of a pair of blades (lower blade 1a and upper blade 2a) in the cutting device 10, and then the metal plate as the material to be cut may be cut to manufacture the metal plate.

[0043] As described in the above embodiment, according to the present invention, the clearance when the blades (lower blade 1a and upper blade 2a) in the cutting device 10 mesh can be easily and precisely adjusted, and can be stably fixed at a desired position. Furthermore, since the lower blade holder 1 can be moved in the adjustment direction N by the clearance adjustment amount based on the rotation angle of the rotation drive mechanism 6, the clearance can be adjusted by operating the rotation drive mechanism 6 by remote control. Therefore, when applied to a continuous line for manufacturing metal plates, the clearance can be smoothly adjusted by remote control according to the plate thickness.

[0044] 1 to 5, the embodiment described above is configured to provide the clearance adjustment mechanism 3 to the lower blade holder 1 having the lower blade 1a, and to adjust the clearance by moving the lower blade holder 1 (lower blade 1a) in the adjustment direction N, but the present invention is not limited to this configuration. In other words, the upper blade holder 2 having the upper blade 2a may be provided with the clearance adjustment mechanism 3, and the upper blade holder 2 (upper blade 2a) may be moved in the adjustment direction N to adjust the clearance.

[0045] In addition, in the above embodiment, the upper blade holder 2 having the upper blade 2a is moved toward the lower blade holder 1 having the lower blade 1a to cut the material to be cut located between the upper blade holder 2 and the lower blade holder 1, but the present invention is not limited to this configuration. In other words, the lower blade holder 1 (lower blade 1a) may be moved toward the upper blade holder 2 (upper blade 2a) to cut the material to be cut located between the upper blade holder 2 and the lower blade holder 1.

[0046] Furthermore, in the above embodiment, the upper blade holder 2 having the upper blade 2a is movable in the cutting direction M, and the lower blade holder 1 having the lower blade 1a is movable in the adjustment direction N, but the present invention is not limited to this configuration. In other words, the lower blade holder 1 having the lower blade 1a may be moved in the cutting direction M, and the upper blade holder 2 having the upper blade 2a may be moved in the adjustment direction N.

[0047] Furthermore, as long as it is possible to adjust the clearance of the cutting device 10 according to the present invention, the present invention may be configured so that the lower blade holder 1 having the lower blade 1a can be moved in the cutting direction M and the adjustment direction N, or the upper blade holder 2 having the upper blade 2a can be moved in the cutting direction M and the adjustment direction N.

[0048] In the above embodiment, the pressing member 5a (5c) presses one of the pair of pressed portions 4a (41a, 42a) to move the lower blade holder 1 together with the pressed portion 4a (41a, 42a) in the adjustment direction N to adjust the clearance, but the present invention is not limited to this configuration. In other words, any configuration may be used as long as the clearance is adjusted by moving the lower blade holder 1 in the adjustment direction N according to the clearance adjustment amount based on the rotation angle of the rotation drive mechanism 6. In this case, for example, a known mechanism such as a gear mechanism that converts the rotational motion of the rotating rod 5 into linear motion of the lower blade holder 1 in the adjustment direction N may be applied.

[0049] Here, the first blade according to the present invention corresponds to the lower blade 1a or the upper blade 2a in the above-mentioned embodiment, and the second blade according to the present invention corresponds to the lower blade 1a or the upper blade 2a in the above-mentioned embodiment. Also, the first blade holder according to the present invention corresponds to the lower blade holder 1 or the upper blade holder 2 in the above-mentioned embodiment, and the second blade holder according to the present invention corresponds to the lower blade holder 1 or the upper blade holder 2 in the above-mentioned embodiment. [Explanation of symbols]

[0050] 1 Lower blade holder 1a Lower blade 2 Upper blade holder 2a upper knife 3 Clearance adjustment mechanism 4, 41, 42 Pressurized member 4a Pressed part 5 Rotating pole 5a, 5c Pressing member 5b Circular member 6 Rotational drive mechanism 6a Rotational drive source 6b Rotational drive transmission part 6c Pulley 6d Chain 10 Cutting device A Rotation direction B Outermost edge C Other edge M Cutting direction N Adjustment direction O Rotation Center P Rotational axis direction

Claims

1. A cutting device that cuts a cutting target material with a pair of blades including a first blade and a second blade that moves in a cutting direction toward the first blade, a clearance adjustment mechanism that adjusts a clearance when the first blade and the second blade are engaged with each other by moving the first blade or the second blade in an adjustment direction perpendicular to the cutting direction by a clearance adjustment amount based on a rotation angle of a rotation drive mechanism; the rotation drive mechanism has a rotation drive source that fixes rotation to fix a position of the first blade or the second blade in the adjustment direction, The clearance adjustment mechanism is provided on a first blade holder having the first blade or a second blade holder having the second blade, The clearance adjustment mechanism includes: a pressed member fixed to the first blade holder or the second blade holder and having a pair of pressed parts disposed at an interval from each other in the adjustment direction; a rotating rod that is disposed between the pair of pressed portions, extends in a direction perpendicular to the cutting direction and the adjustment direction, and receives a rotational driving force from the rotation driving mechanism; a pressing member disposed around the rotating rod and contacting one of the pair of pressed parts by rotation of the rotating rod to press the pressed part and move the first blade holder or the second blade holder together with the pair of pressed parts in the adjustment direction; the pressed member is a rectangular frame member provided so as to surround the rotating rod and the pressing member, and the pair of pressed portions are a pair of opposing inner surfaces of the frame member, The cutting device, wherein the rotary drive source is connected to the rotating rod and transmits the rotary drive force generated by the rotary drive source directly to the rotating rod.

2. 2. The cutting device according to claim 1, wherein the pressing member has an elliptical cross-sectional shape and rotates relative to the pressed member when the rotary rod is rotated by the rotational driving force.

3. 3. The cutting device according to claim 1, wherein a plurality of the pressed members are provided along the rotation axis direction of the rotating rod.

4. 2. A clearance adjustment method for adjusting a clearance when the first blade and the second blade are engaged with each other, using the cutting device according to claim 1, comprising: Rotating the rotating rod by the rotational driving force; a step of pressing the pressing member provided around the rotating rod against one of a pair of pressed portions by rotating the rotating rod; and moving the first blade holder or the second blade holder together with the pair of pressed portions in the adjustment direction by the pressing member. How to adjust clearance for cutting equipment.

5. A method for manufacturing a metal plate, comprising: adjusting a clearance between the first blade or the second blade by using the method for adjusting a clearance of a cutting device according to claim 4 to cut the metal plate.

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