Cutting device

Abstract

To provide a cutting device which can suitably cut a processing object while suppressing enlargement of the device.SOLUTION: An anvil roller 10 of a cutting device 1 includes a cylindrical supporting surface which can rotate around a rotation axis orthogonal to a transportation direction of a processing object that is a belt-like thin plate material to extend in a horizontal direction and support an undersurface of the processing object. A roller cutter 20 includes: a cutter shaft 21 which is arranged above the anvil roller 10 to extend in the horizontal direction and rotate in conjunction with the anvil roller 10; and a cutting blade 22 which stands on the cutter shaft 21 to cut the processing object from an upper surface side while rotating. A rotation axis of the roller cutter 20 is slanted to a rotation axis of the anvil roller 10 when viewed from a vertical direction. The cutting blade 22 stands on a cutter shaft to be in parallel with the rotation axis of the anvil roller 10 at a position contacting with the processing object when viewed from the vertical direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cutting device. [Background technology]

[0002] There is a technique for producing a thin strip of a predetermined shape from a strip-like or roll-like thin plate made of a metal material or the like.

[0003] For example, a technology has been disclosed in which a rotary die cutter is used to clamp a thin strip between a die roll including cutting blades and grooves and an anvil roll, while the cutting blades are fitted into the grooves with a gap therebetween to cut the thin strip and punch out thin strip pieces (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-032897 A Summary of the Invention [Problem to be solved by the invention]

[0005] When cutting a wide sheet material in a line perpendicular to the conveying direction using the above-mentioned technology, the load required for cutting (cutting load) increases according to the width of the sheet material. On the other hand, if the cutting load increases, the cutting force required for the sheet material to be pushed through the cutting blade and the rigidity of the structure supporting the cutting blade may be insufficient. However, if the diameter of the anvil roller and the roller cutter is increased to suppress this phenomenon, this leads to an increase in the size of the equipment and an increase in costs, which is undesirable.

[0006] The present disclosure has been made to solve such problems, and has an object to provide a cutting device that can suitably cut a processing object while suppressing an increase in size of the device. [Means for solving the problem]

[0007] The cutting device according to the present disclosure includes an anvil roller and a roller cutter. The anvil roller is rotatable along a rotation axis perpendicular to the conveying direction of the object to be processed, which is a strip-shaped thin plate material, and has a cylindrical support surface extending horizontally to support the lower surface of the object to be processed. The roller cutter includes a cutter shaft extending horizontally above the anvil roller and rotating in conjunction with the anvil roller, and a cutting blade erected on the cutter shaft and cutting the object to be processed from the upper surface side while rotating. The rotation axis of the roller cutter is inclined with respect to the rotation axis of the anvil roller when viewed vertically. The cutting blade is erected on the cutter shaft so as to be parallel to the rotation axis of the anvil roller at a position where it comes into contact with the object to be processed when viewed vertically.

[0008] With the above-described configuration, the timing at which the cutting edge of the roller cutter comes into contact with the processing object can be shifted depending on the position of the cutting edge. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a cutting device that can suitably cut a processing object while suppressing an increase in size of the device. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a top view of the cutting device according to the embodiment. [Diagram 2] FIG. 2 is a front view of the cutting device according to the embodiment. [Diagram 3] 1 is a cross-sectional view of a cutting device according to an embodiment taken in a side direction. [Figure 4] 11A and 11B are diagrams for explaining a cutting operation of the cutting device. [Diagram 5] 11A to 11C are diagrams showing variations in the shape of a cutting blade of a cutting device. [Figure 6] 11A to 11C are diagrams showing variations in the form of a pressing portion of a cutting device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention will be described below through the embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. In addition, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In each drawing, the same elements are given the same reference numerals, and duplicate explanations are omitted as necessary.

[0012] <Embodiment Mode> DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a top view of a cutting device 1 according to the embodiment. Fig. 2 is a front view of the cutting device 1 according to the embodiment.

[0013] For the sake of convenience in explaining the positional relationships of the components, each drawing in this disclosure is illustrated with a right-handed Cartesian coordinate system. The X-, Y-, and Z-axis directions in Fig. 1 correspond to the X-, Y-, and Z-axis directions of these Cartesian coordinate systems in Fig. 2 and subsequent figures.

[0014] The cutting device 1 according to the present disclosure cuts a processing object 90, which is a strip-shaped thin plate material, into strips. The processing object 90 may be, for example, a thin plate of metal or resin. The processing object 90 may also be a layered structure of metal and resin. The processing object 90 may also be called a raw material or a web. The cutting device 1 has an anvil roller 10 and a roller cutter 20.

[0015] The anvil roller 10 is rotatable along a rotation axis perpendicular to the transport direction of the processing object 90, which is a strip-shaped thin plate material, and has a cylindrical support surface 111 extending horizontally to support the lower surface of the processing object 90.

[0016] The anvil roller 10 has an anvil shaft 11 rotatably supported at both ends by anvil support parts 12. The anvil support parts 12 include bearings 121 for smoothly rotating the anvil shaft 11. The anvil roller 10 also has an anvil drive motor 13 for driving the anvil shaft 11. The anvil drive motor 13 rotates the anvil shaft 11, the both ends of which are supported by the anvil support parts 12, about an anvil shaft center C10. The anvil shaft center C10 is an axis parallel to the X-axis.

[0017] The anvil shaft 11 has a support surface 111 and a receiving portion 112. The support surface 111 contacts the lower surface of the processing object 90 while rotating, and transports the processing object 90. The cutting device 1 transports the processing object 90 from the positive side of the Y axis to the negative side of the Y axis.

[0018] The receiving portion 112 receives the cutting blade 22 of the roller cutter 20 that rotates above the anvil roller 10 in correspondence with the anvil roller 10. In other words, the receiving portion 112 supports the cut portion of the processing object 90.

[0019] The roller cutter 20 has a cutter shaft 21 that extends horizontally above the anvil roller 10 and rotates in conjunction with the anvil roller 10, and a cutting blade 22 that is erected on the cutter shaft 21 and cuts the object to be treated 90 from the upper side of the object to be treated 90 as it rotates.

[0020] The roller cutter 20 has a cutter shaft support portion 23 that rotatably supports both ends of the cutter shaft 21. The cutter shaft support portion 23 is fixed to the upper surface of the anvil support portion 12 by a fastening member such as a bolt. The cutter shaft support portion 23 has a bearing 231 for smoothly rotating the cutter shaft 21. The roller cutter 20 also has a cutter shaft drive motor 24 for driving the cutter shaft 21. The cutter shaft drive motor 24 and the above-mentioned anvil drive motor 13 operate in correspondence with each other so as to cut the processing object 90 at a desired position. That is, the cutting device 1 controls the cutter shaft drive motor 24 and the anvil drive motor 13 so that the cutting blade 22 and the receiving portion 112 sandwich and cut the processing object 90. The cutting device 1 according to this embodiment is configured so that the cutting blade 22 of the cutter shaft 21 is located at the bottom dead center when the receiving portion 112 is located at the top dead center of the anvil shaft 11.

[0021] When viewed vertically, the cutter shaft center C20, which is the rotation axis of the roller cutter 20, is inclined with respect to the anvil shaft center C10, which is the rotation axis of the anvil roller 10. That is, as shown in Fig. 1, the anvil shaft center C10 and the cutter shaft center C20 have an inclination angle N1 when viewed from above downward.

[0022] The cutting blade 22 is erected on the cutter shaft 21 so as to be parallel to the rotation axis of the anvil roller 10 (i.e., the anvil shaft center C10) when viewed from the vertical direction at the position where the cutting blade 22 contacts the processing object 90. In other words, the cutter shaft 21 holds the cutting blade 22 at an inclination angle N1 with respect to the cutter shaft center C20, which is the rotation center of the cutter shaft 21.

[0023] With the above-described configuration, the timing at which the cutting edge of the cutting blade 22 of the roller cutter 20 comes into contact with the processing object can be shifted depending on the position of the cutting edge.

[0024] Next, a configuration of a portion where the cutting device 1 cuts the processing target 90 will be described in detail with reference to Fig. 3. Fig. 3 is a cross-sectional view of the cutting device 1 according to the embodiment taken in a side direction.

[0025] In the cutting device 1, the anvil roller 10 has a suction hole 114 for sucking the processing object 90 in the vicinity of the cut portion of the processing object 90. The suction hole 114 is connected to a pump 115 provided outside the anvil shaft 11 via a hole provided inside the anvil shaft 11. As a result, when the pump 115 is driven, the suction hole 114 sucks in air. Therefore, when the anvil shaft 11 rotates and the processing object 90 blocks the suction hole 114, the suction hole 114 exerts a force for holding the processing object 90.

[0026] As a result, the cutting device 1 cuts the processing object 90 while it is held by the anvil roller 10. Therefore, the cutting device 1 can suppress variation in the position at which the processing object 90 is cut. Furthermore, with the above-mentioned configuration, the cutting device 1 can hold the processing object 90 even immediately after cutting is completed. Therefore, the cutting device 1 can suppress a decrease in positional accuracy when transferring the cut processing object 90 to a subsequent process.

[0027] In the cutting device 1, the anvil roller 10 has a receiving portion 112. The receiving portion 112 supports the lower surface of the processing object 90 in the cutting portion when the cutting device 1 cuts the processing object 90. The receiving portion 112 is formed of an elastic material such as rubber, urethane, elastomer, etc. As a result, when the cutting blade 22 moves from above to below the processing object 90, the receiving portion 112 preferably receives the cutting force generated when the cutting blade 22 comes into contact with the processing object 90, while preferably dispersing the pressure applied to the processing object 90. The surface of the receiving portion 112 is the support surface 111.

[0028] In the cutting device 1, the anvil roller 10 has a groove 113 into which the cutting blade 22, which has successively cut the object 90 within a range of a predetermined rotation angle from one end side to the other end side of the cutter shaft 21, enters. The groove 113 is a recess formed in the receiving part 112. As a result, the cutting device 1 allows the cutting blade to protrude below the bottom surface of the object 90 as the roller cutter 20 rotates.

[0029] The roller cutter 20 also has a pressing portion 25, which is an elastic body that can press the processing object 90 against the support surface 111 when the cutting blade 22 contacts the processing object 90 near the cutting blade 22 and at least at the end in the extension direction of the cutter shaft 21. The pressing portion 25 is formed of an elastic material such as rubber, urethane, elastomer, etc. This allows the cutting device 1 to cut the processing object in a stable state. Furthermore, with the above-mentioned configuration, the cutting device 1 can suppress the behavior of the processing object 90 being drawn into the groove portion 113 when the cutting blade 22 pushes through the processing object 90.

[0030] Next, the movement of the cutting device 1 when cutting the processing object 90 will be described with reference to Fig. 4. Fig. 4 is a diagram for explaining the cutting operation of the cutting device 1. Fig. 4 shows state changes accompanying the progress of the operation of the anvil roller 10 and the roller cutter 20 at each of cross sections B1, B2, and B3 shown in Fig. 2. Here, the progress of the operation is represented by the angle formed between the axis Z1 parallel to the vertical direction and the cutting blade 22 at three times (times T1, T2, and T3).

[0031] In the example shown in Fig. 4, for ease of understanding, the shape of the cutting edge 22 is a strip extending parallel to the horizontal direction. However, as described later, the shape of the cutting edge 22 is not limited to that shown in Fig. 4.

[0032] The axis Z1 is an axis that passes through the cutter shaft center C20 and is parallel to the Z axis. The reference characters indicating the components in Fig. 4 are collectively written in the upper right column. The reference characters indicating the corresponding components of the cutting device 1 shown in other columns are the same as those shown in the upper right column of the figure.

[0033] In Fig. 4, nine columns of three columns x three rows each contain one cross section of the cutting device 1. The right column shows the state of the anvil roller 10 and the roller cutter 20 at cross section B1. The center column shows the state of the anvil roller 10 and the roller cutter 20 at cross section B2. The left column shows the state of the anvil roller 10 and the roller cutter 20 at cross section B3.

[0034] Sections B1 to B3 in the top row show the respective states of the anvil roller 10 and the roller cutter 20 when time T is time T1. Sections B1 to B3 in the middle row show the respective states of the anvil roller 10 and the roller cutter 20 at time T2 after time T1. Sections B1 to B3 in the bottom row show the respective states of the anvil roller 10 and the roller cutter 20 at time T3 after time T2.

[0035] Here, time T1 indicates a state at the time when the cutting device 1 starts cutting the processing object 90. At this time, the cutting blade 22 forms an angle A1 with the axis Z1. In the cross section B1, the vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 is a distance D11. Similarly, in the cross section B2, the distance from the anvil shaft center C10 to the tip of the cutting blade 22 is a distance D12 that is longer than the distance D11. In the cross section B3, the distance from the anvil shaft center C10 to the tip of the cutting blade 22 is a distance D13 that is longer than the distance D12.

[0036] Thus, the height of the tip of the cutting blade 22 varies depending on the cross section. This is because, as shown in Fig. 1, the cutter shaft center C20, which is the rotation center of the roller cutter 20, and the cutting blade 22 have an inclination angle N1 when observed vertically. As a result, the cutting blade 22 comes into contact with the processing object 90 from the end on the cross section B1 side to perform cutting. Then, as the anvil roller 10 and the roller cutter 20 each rotate, and the angle A1 becomes smaller, the cutting blade 22 cuts the processing object 90 successively from the cross section B1 side toward the cross section B3 side.

[0037] Next, the state of each cross section at time T2 will be described. Time T2 indicates the position where the cutting blade 22 reaches the bottom dead center. In this case, the angle A2 formed by the axis Z1 and the cutting blade 22 is 0 degrees. The vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 at time T2 is distance D21 in cross section B1. Similarly, the vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 in cross section B2 is distance D22. The vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 in cross section B3 is distance D23. At this time, the distances D21, D22, and D23 are equal to each other. That is, the cutting device 1 shown in FIG. 4 completes cutting of the processing object 90 at time T2.

[0038] Next, the state of each cross section at time T3 will be described. At time T3, the cutting blade 22 has passed the bottom dead center and is inclined toward the side where the cut processing object 90 is separated. More specifically, at time T3, the cutting blade 22 and the axis Z1 form an angle A3. At the angle A3, the vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 in the cross section B1 is a distance D31. The vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 in the cross section B2 is a distance D32 that is shorter than the distance D31. The vertical distance from the anvil shaft center C10 to the tip of the cutting blade 22 in the cross section B3 is a distance D33 that is shorter than the distance D32.

[0039] In this way, when the cutting blade 22 of the cutting device 1 has a shape that extends parallel to the horizontal direction, the cutting blade 22 of one end side, that is, the cross section B1 side, comes into contact with the processing object 90 first. Then, the cutting blade 22 of the cross section B1 side that came into contact with the processing object 90 first leaves the processing object 90 first. The cutting device 1 comes into contact with the processing object 90 last at the cross section B3 side, that is the other end side. Then, the cutting blade 22 of the cross section B3 side that came into contact with the processing object 90 last leaves the processing object 90 last.

[0040] With the above-mentioned configuration, the cutting device 1 sequentially cuts the processing object 90, for example, in the range from the angle A1 to the angle A2 described above. That is, in the roller cutter 20, the cutting edge of the cutting blade 22 at one end in the extension direction of the cutter shaft 21 contacts the processing object before the cutting edge of the cutting blade 22 at the other end. In this way, by distributing the process of cutting the processing object 90 over a predetermined period, the cutting device 1 distributes over time the load associated with the cutting force received by the cutting blade 22 or each component of the cutting device 1. With such a configuration, the present embodiment can provide a cutting device that can suitably cut the processing object while suppressing an increase in size of the device.

[0041] Next, variations in the shape of the cutting blade 22 will be described with reference to Fig. 5. Fig. 5 is a diagram showing variations in the shape of the cutting blade 22 of the cutting device 1. Fig. 5 shows an extracted portion of the roller cutter 20. Fig. 5 also shows cutting blades 22A to 22E below the roller cutter 20 as examples of the variations in the cutting blade 22.

[0042] The cutting blade 22A is the one used in the cutting device 1 shown in Fig. 4, and has a rectangular shape with a blade tip extending horizontally. That is, in the roller cutter 20, a first distance D21 from the cutter shaft center C20 to the blade tip of the cutting blade 22A is equal to a second distance D22R and a second distance D22L from the cutter shaft center C20 to the blade tip of the cutting blade 22A at the end of the extension direction of the cutter shaft 21. With this shape, the cutting blade 22A cuts the processing object 90 successively, and completes the cutting when it reaches the bottom dead center of the roller cutter 20.

[0043] The cutting edge 22B is longer at the center than at both ends. That is, in this case, the roller cutter 20 has a first distance D21 from the cutter shaft center C20 to the cutting edge of the cutting edge 22B longer than the second distances D22R and D22L from the cutter shaft center C20 to the cutting edge of the cutting edge 22B at the ends in the extension direction of the cutter shaft 21. Also, the cutting edge 22C is longer at the center than at both ends, and the shape of the cutting edge changes in stages from the ends to the center.

[0044] The cutting edge 22D has an asymmetric shape with respect to the center. That is, in this case, the first distance D21 from the cutter shaft center C20 to the cutting edge of the cutting edge 22D at the center is equal to the second distance D22R at one end in the extension direction of the cutter shaft 21. On the other hand, the first distance D21 from the cutter shaft center C20 to the cutting edge of the cutting edge 22D at the center is longer than the second distance D22L at the end on the opposite side in the extension direction of the cutter shaft 21.

[0045] The cutting edge 22E has a shape in which the cutting edge becomes shorter from the right end to the left end. That is, in this case, the first distance D21 from the cutter shaft center C20 at the center to the cutting edge of the cutting edge 22D is shorter than the second distance D22R at one end in the extension direction of the cutter shaft 21. On the other hand, the first distance D21 from the cutter shaft center C20 at the center to the cutting edge of the cutting edge 22D is longer than the second distance D22L at the end on the opposite side in the extension direction of the cutter shaft 21.

[0046] As described above, various shapes may be adopted for the cutting blade 22 of the cutting device 1. This allows the cutting device 1 to set the load distribution state when cutting the processing object 90. Alternatively, the cutting device 1 can adjust the cutting time of the processing object 90 and the distribution of the cutting load distribution.

[0047] The above-described variations of the cutting blade 22 are merely examples, and the cutting device 1 may adopt a shape of the cutting blade 22 other than the above-described shape. Instead of the cutting blade 22 shown in FIG. 5, the cutting blade 22 may have a curved cutting edge.

[0048] Next, variations in the configuration of the pressing portion 25 will be described with reference to Fig. 6. Fig. 6 is a diagram showing variations in the configuration of the pressing portion 25. Fig. 6 shows an extracted portion of the roller cutter 20. Fig. 6 also shows pressing portion 25A and pressing portion 25B below the roller cutter 20 as examples of the variations of the pressing portion 25.

[0049] The distance from the cutter shaft center C20 to the tip of the pressing portion 25A in the left-right direction is longer than the distance of the cutting blade 22. With this configuration, the cutting device 1 can cut the processing object 90 while firmly holding down the processing object 90. This also allows the cutting device 1 to efficiently transmit the cutting force of the cutting blade 22 to the processing object 90 at the start of cutting. Therefore, the above-mentioned configuration can prevent the device from becoming large in size.

[0050] At the left and right ends of the pressing portion 25B, the distance from the cutter shaft center C20 to the tip is longer than the distance of the cutting blade 22. On the other hand, at the center, the distance from the cutter shaft center C20 to the tip of the pressing portion 25B is shorter than at the end. That is, the height of the center of the pressing portion 25B is lower than the height of the end. With this configuration, when cutting the processing object 90, the cutting device 1 cuts the processing object 90 while steadily pressing the processing object 90 at the start and end of cutting. On the other hand, by making the pressing portion at the center lower than the end, the cutting device 1 cuts the processing object 90 by suppressing the application of excessive pressing force to the processing object 90 in the intermediate part of the cutting, and cuts the processing object 90 with an appropriate cutting force.

[0051] Although the embodiment has been described above, the cutting device 1 according to the present embodiment is not limited to the above-mentioned configuration. For example, the receiving portion 112 may have flexibility and restorability sufficient to receive the cutting blade 22 that has cut the processing object 90, instead of the groove portion 113. With such a configuration, the cutting device 1 can omit highly accurate management of the height of the blade tip using, for example, a bearer. However, the adoption of this configuration does not mean that the use of a bearer or a similar means for managing the relative distance between the anvil roller 10 and the roller cutter 20 in the cutting device 1 is denied.

[0052] The above-described cutting device 1 has the receiving portion 112 at one position on the anvil roller 10, and the cutting blade 22 at one position on the roller cutter 20. However, the cutting device 1 may have the receiving portions 112 at multiple positions in the rotation direction of the anvil roller 10. Similarly, the cutting device 1 may have the cutting blade 22 at multiple positions in the rotation direction of the roller cutter 20.

[0053] As described above, according to the embodiment, it is possible to provide a cutting device that can suitably cut a processing object while suppressing an increase in size of the device.

[0054] It should be noted that the present invention is not limited to the above, and various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention. [Explanation of symbols]

[0055] 1 cutting device 10 Anvil Roller 11 Anvil shaft 12 Anvil support 13 Anvil drive motor 20 Roller cutter 21 Cutter shaft 22 Cutting edge 23 Cutter shaft support 24 Cutter shaft drive motor 25 Holding part 90 Processing Target 111 Support surface 112 Receiving part 113 Groove 114 Suction hole 115 Pump 121 Bearings 231 Bearings C10 Anvil shaft center C20 Cutter shaft center

Claims

1. an anvil roller that is rotatable along a rotation axis perpendicular to a conveying direction of the object to be processed, the object being a strip-shaped thin plate material, and has a cylindrical support surface that extends in a horizontal direction and supports a lower surface of the object to be processed; A roller cutter includes a cutter shaft that extends horizontally above the anvil roller and rotates in conjunction with the anvil roller, and a cutting blade that is erected on the cutter shaft and cuts the processing object from the top surface side while rotating, a rotation axis of the roller cutter is inclined with respect to a rotation axis of the anvil roller when viewed from a vertical direction; The cutting blade is provided on the cutter shaft so as to be parallel to the rotation axis of the anvil roller at a position where the cutting blade contacts the processing object when viewed from a vertical direction. Cutting device.

2. The roller cutter is configured so that a cutting edge of the cutting blade at one end in an extension direction of the cutter shaft comes into contact with the processing object before a cutting edge of the cutting blade at the other end.

2. The cutting device of claim 1.

3. The anvil roller has a suction hole for sucking the processing object in the vicinity of the cut portion of the processing object.

2. The cutting device of claim 1.

4. The anvil roller has either a receiving portion having flexibility and restorability for receiving the cutting blade that has successively cut the processing object within a range of a predetermined rotation angle from one end side to the other end side of the cutter shaft, or a groove portion into which the cutting blade fits.

2. The cutting device of claim 1.

5. the roller cutter has an elastic body that is capable of pressing the object to be treated against the support surface when the cutting blade comes into contact with the object to be treated, at least at an end portion in the extension direction of the cutter shaft and in the vicinity of the cutting blade; A cutting device according to any one of claims 1 to 4.

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