Rotary die cutter, cutter roll, and anvil roll

Abstract

The aim is to achieve both vibration suppression and simplification of the device configuration. [Solution] A rotary die cutter is a device that cuts a workpiece with a cutting blade. The rotary die cutter comprises a first roll member that is rotatable around a first axis and has an outer surface that follows the circumferential direction around the first axis, and a second roll member that is rotatable around a second axis parallel to the first axis and has an outer surface that follows the circumferential direction around the second axis. A cutting blade is provided on the outer surface of either the first roll member or the second roll member. The first roll member has a shaft portion that is rotatably supported around the first axis, a main body portion fixed to the shaft portion and on which cutting is performed by the cutting blade, and a vibration adjustment portion that is positioned differently from the main body portion in the axial direction. The vibration adjustment portion includes an annular portion that surrounds the shaft portion with a gap between it and the outer surface of the shaft portion, and a plurality of elastic bodies arranged around the first axis and connected to the shaft portion and the annular portion.

Description

Technical Field

[0001] The present disclosure relates to a rotary die cutter, a cutter roll, and an anvil roll.

Background Art

[0002] Patent Document 1 discloses a rotary cutting device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present disclosure provides a rotary die cutter, a cutter roll, and an anvil roll that are useful for achieving both vibration suppression and simplification of the device configuration.

Means for Solving the Problems

[0005] [1] A rotary die cutter for cutting a workpiece with a cutting blade, comprising: a first roll member rotatably provided around a first axis and having an outer peripheral surface along a circumferential direction around the first axis; and a second roll member rotatably provided around a second axis parallel to the first axis and having an outer peripheral surface along a circumferential direction around the second axis, wherein the cutting blade is provided on an outer peripheral surface of either the first roll member or the second roll member, the first roll member includes a shaft portion rotatably supported around the first axis, a main body portion fixed to the shaft portion and where cutting by the cutting blade is performed, and a vibration adjustment portion disposed at a position different from the main body portion in the axial direction, the vibration adjustment portion includes an annular portion surrounding the shaft portion with a gap between the annular portion and the outer peripheral surface of the shaft portion, and a plurality of elastic bodies provided so as to connect the shaft portion and the annular portion and arranged along the first axis.

[0006] [2] The rotary die cutter according to [1], wherein the cutting blade is provided on the outer circumferential surface of the main body of the first roll member, the second roll member having a second shaft portion supported so as to be rotatable about a second axis, a second main body portion fixed to the second shaft portion and forming an outer circumferential surface in contact with the cutting blade, and a second vibration adjustment portion positioned at a different location from the second main body portion in the axial direction of the second axis, the second vibration adjustment portion including a second annular portion surrounding the second shaft portion with a gap between it and the outer circumferential surface of the second shaft portion, and a plurality of second elastic bodies provided to connect the second shaft portion and the second annular portion and arranged around the second axis.

[0007] [3] The rotary die cutter according to [1] or [2] above, wherein the plurality of elastic bodies are arranged at equal intervals in the circumferential direction about the axis.

[0008] [4] A cutter roll for use in a rotary die cutter, comprising: a cutting blade for cutting a workpiece; a shaft portion formed to extend in one direction; a main body portion forming an outer circumferential surface along the circumferential direction about the central axis of the shaft portion; and a vibration adjustment portion positioned at a different location from the main body portion in the direction in which the shaft portion extends, wherein the cutting blade is provided on the outer circumferential surface of the main body portion, and the vibration adjustment portion comprises: an annular portion surrounding the shaft portion with a gap between it and the outer circumferential surface of the shaft portion; and a plurality of elastic bodies provided to connect the shaft portion and the annular portion and arranged around the central axis, the cutter roll.

[0009] [5] An anvil roll used in a rotary die cutter that cuts a workpiece with a cutting blade, comprising: a shaft portion formed to extend in one direction; a main body portion having an outer circumferential surface along the circumferential direction about the central axis of the shaft portion, on which cutting by the cutting blade is performed; and a vibration adjustment portion positioned at a different location from the main body portion in the direction in which the shaft portion extends, wherein the vibration adjustment portion comprises an annular portion surrounding the shaft portion with a gap between it and the outer circumferential surface of the shaft portion, and a plurality of elastic bodies provided to connect the shaft portion and the annular portion, arranged around the central axis, the anvil roll. [Effects of the Invention]

[0010] This disclosure provides a rotary die cutter, a cutter roll, and an anvil roll that are useful for achieving both vibration suppression and simplification of the device configuration. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a schematic perspective view illustrating a rotary die cutter. [Figure 2] Figure 2 is a schematic front view illustrating a rotary die cutter. [Figure 3] Figure 3 is a schematic perspective view illustrating the cutting process using a rotary die cutter. [Figure 4] Figure 4(a) is a schematic front view of the cutter roll. Figure 4(b) is a schematic cross-sectional view along the line IVb-IVb in Figure 4(a). [Figure 5] Figure 5 is a schematic cross-sectional view of the VV line in Figure 4(b). [Figure 6] Figure 6(a) is a schematic front view of the anvil roll. Figure 6(b) is a schematic cross-sectional view of Figure 6(a) along the line VIb-VIb. [Modes for carrying out the invention]

[0012] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. The following embodiment is illustrative for explaining the invention of the present disclosure and is not intended to limit the invention of the present disclosure to the following. In the description, the same reference numerals will be used for elements that are the same or have the same function, and redundant explanations will be omitted where necessary. Also, unless otherwise specified, positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of each element are not limited to the ratios shown. Each drawing shows a Cartesian coordinate system defined by the X, Y, and Z axes. The Z axis represents the vertical direction, and the X and Y axes represent the mutually orthogonal horizontal directions. The positive Z axis direction represents the vertically upward direction.

[0013] [Overall configuration of a rotary die cutter] Figures 1 and 2 schematically show a rotary die cutter according to one embodiment. Figure 3 schematically shows how the rotary die cutter cuts a material. The rotary die cutter 1 shown in Figures 1 and 2 is a device that cuts a material (hereinafter referred to as "workpiece W") using a cutting blade. The rotary die cutter 1 is also called a rotary cutter. The workpiece W, which is the object to be processed, is a strip-shaped material, such as nonwoven fabric, paper, or film.

[0014] The rotary die cutter 1 is configured, for example, to cut out (contour shape) the workpiece W using a cutting blade (see also Figure 3). The workpiece W remaining after cutting by the rotary die cutter 1 may be used as the product, or the portion of the workpiece W cut out by the rotary die cutter 1 may be used as the product.

[0015] As shown in Figures 1 and 2, the rotary die cutter 1 includes, for example, a cutter roll 10, an anvil roll 30, a frame 50, a rotation support section 61, a rotation support section 62, a pressurizing section 68, and a rotation drive section 69. Note that the rotation drive section 69 is omitted in Figure 1.

[0016] The cutter roll 10 (first roll member) is provided rotatably about a horizontal axis Ax1 (first axis) and is a member having an outer peripheral surface along the circumferential direction about the axis Ax1. The cutter roll 10 is formed to extend in one direction and is formed in a cylindrical shape as a whole. Hereinafter, for convenience of explanation, it is assumed that the axial direction in which the axis Ax1 extends is the "X-axis direction". The cutter roll 10 is formed to extend in the X-axis direction, and the axis Ax1 is set to pass through the center of a cross-section perpendicular to the X-axis direction of the cutter roll 10 (shaft portion 15 described later).

[0017] The cutter roll 10 has a cutting blade 11, an outer peripheral surface 12, and a pair of guide rings 13. The cutting blade 11 has a shape corresponding to the cutting process for the workpiece W. When the blanking process of the workpiece W is performed, a part of the workpiece W is cut along the contour of the cutting blade 11. The outer peripheral surface 12 is a circumferential surface along the circumferential direction about the axis Ax1. The outer peripheral surface 12 is formed in most of the entire length of the cutter roll 10 in the axial direction of the axis Ax1.

[0018] The cutter roll 10 is, for example, made of metal. At least the surface layer forming the outer peripheral surface 12 of the cutter roll 10 may be formed of a hard material such as cemented carbide. The portion other than the above surface layer may be of the same material as the hard material forming the surface layer or may be of a different material (for example, steel). The cutting blade 11 is provided on the outer peripheral surface 12. In other words, the cutting blade 11 is provided so as to project outward from the outer peripheral surface 12.

[0019] A pair of guide rings 13 are provided with the cutting blade 11 interposed therebetween in the axial direction of the axis Ax1. Each of the pair of guide rings 13 is formed in an annular shape. The pair of guide rings 13 are respectively provided at both ends in the axial direction of the axis Ax1 of the outer peripheral surface 12. The guide ring 13 has a peripheral surface located outward of the outer peripheral surface 12. When based on the outer peripheral surface 12, the height of the guide ring 13 (the height of the peripheral surface of the guide ring 13) substantially coincides with the height of the cutting edge of the cutting blade 11. Instead of the configuration in which the pair of guide rings 13 are provided on the outer peripheral surface 12, the pair of guide rings 13 may be formed integrally with an annular portion surrounding the shaft portion 15 described later and having at least a part of the outer peripheral surface 12.

[0020] The anvil roll 30 (second roll member) is provided rotatably around a horizontal axis Ax2 (second axis) and is a member having an outer peripheral surface along the circumferential direction around the axis Ax2. The axis Ax1 is parallel to the axis Ax2. In the present disclosure, "parallel" includes not only the case of being strictly parallel but also the state including manufacturing errors or installation errors and allows the case of being substantially parallel. The same applies to "vertical", "orthogonal", and "coincident", and the state including manufacturing errors or installation errors is allowed.

[0021] The axis Ax1 and the axis Ax2 are set to be arranged in the vertical direction. For example, the axis Ax1 is located vertically above the axis Ax2. The anvil roll 30 has an outer peripheral surface 32. The outer peripheral surface 32 is a peripheral surface along the circumferential direction around the axis Ax2. The outer peripheral surface 32 is formed in most of the entire length in the axial direction of the axis Ax2 of the anvil roll 30.

[0022] The anvil roll 30 is, for example, made of metal. At least the surface layer forming the outer circumferential surface 32 of the anvil roll 30 may be made of a hard material such as cemented carbide. The parts other than the surface layer may be made of the same material as the hard material forming the surface layer, or they may be made of a different material (for example, steel). The cutting edge of the cutting blade 11 of the cutter roll 10 contacts the outer circumferential surface 32, and a pair of guide rings 13 also contacts it. The material constituting the cutting blade 11 may be harder than the material forming the surface layer, including the outer circumferential surface 32 of the anvil roll 30.

[0023] The frame 50 is a support member for various components, including the cutter roll 10 and the anvil roll 30. The frame 50 is installed, for example, on the floor. The frame 50 includes, for example, a top plate 51, a bottom plate 52, and a plurality of columns 53. The top plate 51 and the bottom plate 52 are arranged vertically side by side. Each of the top plate 51 and the bottom plate 52 is formed in a plate shape and extends in the X-axis direction. At least one of the top plate 51 and the bottom plate 52 may be formed in a frame shape instead of a plate shape.

[0024] Multiple columns 53 connect the top plate 51 and the bottom plate 52. In one example, two of the multiple columns 53 are positioned between the top plate 51 and the bottom plate 52 at one end in the X-axis direction, and the other two columns 53 are positioned between the top plate 51 and the bottom plate 52 at the other end in the X-axis direction. The two columns 53 positioned at one end in the X-axis direction are spaced apart in the Y-axis direction, and the two columns 53 positioned at the other end in the X-axis direction are also spaced apart in the Y-axis direction.

[0025] The rotating support portion 61 is a member that rotatably supports the cutter roll 10. The rotating support portion 61 includes a bearing. The rotating support portion 61 may consist of a portion provided between two columns 53 located at one end in the X-axis direction and a portion provided between two columns 53 located at the other end in the X-axis direction.

[0026] The rotational support portion 62 is a member that rotatably supports the anvil roll 30. The rotational support portion 62 includes a bearing. The rotational support portion 62 may consist of a portion provided between two columns 53 located at one end in the X-axis direction and a portion provided between two columns 53 located at the other end in the X-axis direction.

[0027] The pressurizing section 68 is a member that pressurizes at least one of the rotating support sections 61 and 62 so that they move closer together. The pressurizing section 68 illustrated in Figures 1 and 2 pressurizes the rotating support section 62 in a direction that moves it closer to the rotating support section 61. The pressurizing section 68 may be an actuator including a drive source such as a cylinder, or it may be an air spring. The pressurizing section 68 may be installed on the bottom plate 52. The pressurizing section 68 may be composed of a portion provided between two columns 53 located on one end in the X-axis direction and a portion provided between two columns 53 located on the other end in the X-axis direction, similar to the rotating support sections 61 and 62. Unlike the examples shown in Figures 1 and 2, the pressurizing section 68 may pressurize the rotating support section 61 in a direction that moves it closer to the rotating support section 62. Alternatively, the pressurizing section 68 may pressurize the rotating support section 62 in a direction that moves it closer to the rotating support section 61 while simultaneously pressurizing the rotating support section 62.

[0028] The rotary drive unit 69 is connected to the cutter roll 10 and is a component (drive unit) that rotates the cutter roll 10 around the axis Ax1. The rotary drive unit 69 includes a drive source such as an electric motor. The rotary drive unit 69 may be installed (fixed) in a predetermined position by a component separate from the frame 50. Unlike the example shown in Figure 2, the rotary drive unit 69 may be connected to the anvil roll 30.

[0029] With the pressurizing section 68 pressing on at least one of the cutter roll 10 and the anvil roll 30 in a direction that brings them closer together, the rotation drive unit 69 rotates the cutter roll 10 around axis Ax1, causing the anvil roll 30, in which the pair of guide rings 13 are in contact, to also rotate around axis Ax2. For example, when the cutter roll 10 rotates counterclockwise as viewed from the position of the rotation drive unit 69, the anvil roll 30 rotates clockwise.

[0030] As illustrated in Figure 3, while the cutter roll 10 and the anvil roll 30 continue to rotate, a strip-shaped workpiece W passes through the space formed between the outer circumferential surface 12 (roll surface) of the cutter roll 10 and the outer circumferential surface 32 (roll surface) of the anvil roll 30. The workpiece W may be fed towards the rotary die cutter 1 by another device so as to pass through the above space. As the workpiece W passes through the space between the outer circumferential surface 12 of the cutter roll 10 and the outer circumferential surface 32 of the anvil roll 30, a portion of the workpiece W is cut (for example, cut out) by the cutting blade 11 provided on the outer circumferential surface 12.

[0031] In Figure 3, components other than the cutter roll 10 and the anvil roll 30 are omitted. In one example, a through hole Wh is formed in the center of the workpiece W in the width direction due to the cutting process by the cutting blade 11. In the portion after passing between the cutter roll 10 and the anvil roll 30, multiple through holes Wh are arranged in the longitudinal direction of the workpiece W. After cutting by the rotary die cutter 1, other processes may be performed on the workpiece W or the cut-out portion.

[0032] (Cutter roll) Next, the details of the cutter roll 10 will be illustrated with reference to Figures 4(a), 4(b), and 5. Figure 4(a) shows a schematic diagram of the cutter roll as viewed from the side, and Figure 4(b) schematically shows a longitudinal section of the cutter roll in a virtual plane containing the axis Ax1. In Figure 4(b), the cross-section of the cutting blade 11 is omitted. Figure 5 schematically shows a cross-section of the cutter roll at a predetermined position in the axial direction. The cutter roll 10 has a shaft portion 15, a main body portion 16, and one or more vibration adjustment portions 20.

[0033] The shaft portion 15 is a shaft member formed in a rod shape so as to extend in one direction. The shaft portion 15 is formed in a cylindrical shape. The shaft portion 15 may be solid. The total length of the shaft portion 15 defines the total length of the cutter roll 10. The shaft portion 15 may include a pair of small-diameter portions located at both ends in the axial direction and a large-diameter portion located between the pair of small-diameter portions. The diameter (outer diameter) of the large-diameter portion is larger than the diameter (outer diameter) of each of the pair of small-diameter portions. The shaft portion 15 is supported so as to be rotatable about axis Ax1. The cutter roll 10 is installed so as to have the central axis of the shaft portion 15 as axis Ax1 (axis of rotation). The pair of small-diameter portions located at both ends of the shaft portion 15 may be rotatably supported by a rotation support portion 61. The shaft portion 15 is made of metal, for example.

[0034] The main body portion 16 is the part that is cut by the cutting blade 11. The main body portion 16 is fixed to the shaft portion 15. The main body portion 16 is formed in an annular shape. The inner circumferential surface of the main body portion 16 is in contact with the outer circumferential surface 15a of the corresponding portion of the shaft portion 15. The shaft portion 15 and the main body portion 16 may be assembled together after being formed individually. Unlike the example shown in Figure 4(b), the shaft portion 15 and the main body portion 16 may be formed integrally. Even in this case, the main body portion 16 is still fixed to the shaft portion 15. The main body portion 16 is made of, for example, metal.

[0035] The outer diameter of the main body portion 16 is larger than the outer diameter of the large-diameter portion of the shaft portion 15. The outer circumferential surface 16a of the main body portion 16 corresponds to a part of the outer circumferential surface 12 of the cutter roll 10. The cutting blade 11 is provided on the outer circumferential surface 16a of the main body portion 16. The workpiece W is cut by the cutting blade 11 through the main body portion 16 of the cutter roll 10 and the portion of the anvil roll 30 corresponding to the main body portion 16 (main body portion 36, which will be described later).

[0036] The cutter roll 10 may have one or more vibration adjustment units 20, or a pair of vibration adjustment units 20. Each of the pair of vibration adjustment units 20 is positioned at a different location from the main body 16 in the axial direction of axis Ax1. The pair of vibration adjustment units 20 sandwich the main body 16 in the axial direction of axis Ax1. In this case, when observed along the axial direction of axis Ax1, one vibration adjustment unit 20, the main body 16, and the other vibration adjustment unit 20 are arranged in this order. Since the pair of vibration adjustment units 20 have similar configurations and functions, one of the vibration adjustment units 20 will be described.

[0037] The vibration adjustment unit 20 has the function of suppressing vibrations transmitted to the cutter roll 10 (vibrations of the entire cutter roll 10). In other words, by providing the vibration adjustment unit 20, vibrations transmitted to the cutter roll 10 are suppressed compared to when the vibration adjustment unit 20 is not provided. The vibration adjustment unit 20 includes an annular portion 22 and a plurality of elastic bodies 24.

[0038] The annular portion 22 is the part that surrounds the shaft portion 15 with a gap between it and the outer circumferential surface 15a of the shaft portion 15. The annular portion 22 is formed in an annular shape, and its center coincides with the central axis of the shaft portion 15. The inner diameter of the annular portion 22 is larger than the outer diameter of the large diameter portion of the shaft portion 15. When observed in the circumferential direction around the axis Ax1, the size of the gap (space) between the inner circumferential surface of the annular portion 22 and the outer circumferential surface of the shaft portion 15 may be constant. The annular portion 22 is made of metal, for example.

[0039] At least a portion of the outer circumferential surface 12 of the cutter roll 10 may be formed by the outer circumferential surfaces 22a of the annular portion 22 (each outer circumferential surface 22a of the pair of annular portions 22) and the outer circumferential surface 16a of the main body portion 16. The relative size of the diameter of the outer circumferential surface 22a of the annular portion 22 and the diameter of the outer circumferential surface 16a of the main body portion 16 is set so as not to hinder the cutting process on the workpiece W. The diameter of the outer circumferential surface 22a of the annular portion 22 may be the same as the diameter of the outer circumferential surface 16a of the main body portion 16, or it may be smaller than the diameter of the outer circumferential surface 16a. Alternatively, the diameter of the outer circumferential surface 22a of the annular portion 22 may be larger than the diameter of the outer circumferential surface 16a of the main body portion 16. If the diameter of the outer circumferential surface 22a is larger than the diameter of the outer circumferential surface 16a, the difference between the two diameters may be smaller than the amount of protrusion of the cutting blade 11 from the outer circumferential surface 16a of the main body portion 16 (the shortest distance between the outer circumferential surface 16a and the cutting edge of the cutting blade 11). If there is a difference between the diameter of the outer surface 22a and the diameter of the outer surface 16a, the difference may be a few millimeters or less. In the axial direction of axis Ax1, the size of the annular portion 22 (one annular portion 22) may be smaller than the main body portion 16, the same as the main body portion 16, or larger than the main body portion 16.

[0040] As shown in Figure 5, the multiple elastic bodies 24 are provided to connect the shaft portion 15 and the annular portion 22 and are arranged in a line around the axis Ax1. Arranged in a line around the axis Ax1 means that the positions of the multiple elastic bodies 24 in the circumferential direction around the axis Ax1 are different. The multiple elastic bodies 24 are arranged in the gap between the inner circumferential surface 22b of the annular portion 22 and the outer circumferential surface 15a of the large diameter portion of the shaft portion 15. The number of multiple elastic bodies 24 arranged around the axis Ax1 is not limited as long as it is 2 or more, but for example it is 4. As illustrated in Figure 5, when observing a cross section perpendicular to the axial direction at a certain position in the axial direction of axis Ax1, multiple elastic bodies 24 may be arranged on the same cross section. In the axial direction of axis Ax1, for example, the positions of the centers of the multiple elastic bodies 24 arranged around axis Ax1 coincide with each other. Unlike the example shown in Figure 5, the positions of the multiple elastic bodies 24 may differ in the axial direction of axis Ax1, and their positions may also differ in the circumferential direction around axis Ax1 (the multiple elastic bodies 24 may be arranged in a helical shape).

[0041] Multiple elastic bodies 24 (for example, four elastic bodies 24) may be arranged at equal intervals in the circumferential direction around the axis Ax1. Each of the multiple elastic bodies 24 may be made of rubber, a spring member, or a material other than rubber or a spring member. If an elastic body 24 is a spring member, the spring member may be a compression coil spring or a tension spring.

[0042] When multiple elastic bodies 24 arranged in the circumferential direction around axis Ax1 and positioned on the same cross-section perpendicular to the axial direction are defined as "one group of elastic bodies 24", multiple groups of elastic bodies 24 may be arranged in the axial direction of axis Ax1 (see Figure 4(b)). The number of elastic bodies 24 in each group may differ or be the same. The circumferential positions of the elastic bodies 24 in each group may differ or be the same.

[0043] In the axial direction of axis Ax1, an annular portion on which one guide ring 13 is provided may be provided next to one vibration adjustment section 20, and an annular portion on which the other guide ring 13 is provided may be provided next to the other vibration adjustment section 20. Each of the pair of annular portions is made of, for example, metal. In one example, the entire outer surface 12 of the cutter roll 10 is formed by the outer surface 16a of the main body 16, the outer surface 22a of the annular portions 22 of each of the pair of vibration adjustment sections 20, and the outer surface of each of the pair of annular portions.

[0044] In Figure 4(a), "a" represents the axial distance (shortest distance) between the points of the cutter roll 10 that are supported by the pair of bearings of the rotating support section 61. The distance a may be 1.5 times or more, 1.7 times or more, 2.0 times or more, or 2.5 times or more the axial size of the main body 16. "b" represents the diameter of the outer circumferential surface 16a of the main body 16. a / b may be 1 / 2 or more, 1 / 1 or more, or 3 / 2 or more. Alternatively, a / b may be 2 / 1 or more, as illustrated in Figure 4(a).

[0045] (Anvil Roll) Next, the details of the anvil roll 30 will be illustrated with reference to Figures 6(a) and 6(b). Figure 6(a) shows a schematic diagram of the anvil roll as viewed from the side, and Figure 6(b) shows a schematic longitudinal section of the anvil roll in a virtual plane containing axis Ax2. The schematic diagram shown in Figure 6(a) corresponds to the schematic diagram shown in Figure 4(a), and the schematic diagram shown in Figure 6(b) corresponds to the schematic diagram shown in Figure 4(b).

[0046] The anvil roll 30 has a shaft portion 35, a main body portion 36, and one or more vibration adjustment portions 40. The shaft portion 35 (second shaft portion) corresponds to the shaft portion 15 of the cutter roll 10. The main body portion 36 (second main body portion) corresponds to the main body portion 16 of the cutter roll 10. The one or more vibration adjustment portions 40 (second vibration adjustment portions) correspond to one or more vibration adjustment portions 20 of the cutter roll 10.

[0047] The shaft portion 35 is a shaft member formed in a rod shape so as to extend in one direction. The shaft portion 35 is formed in a cylindrical shape. The shaft portion 35 may be solid. The total length of the shaft portion 35 defines the total length of the anvil roll 30. The shaft portion 35 may include a pair of small-diameter portions located at both ends in the axial direction and a large-diameter portion located between the pair of small-diameter portions. The diameter (outer diameter) of the large-diameter portion is larger than the diameter (outer diameter) of each of the pair of small-diameter portions. The shaft portion 35 is supported so as to be rotatable about axis Ax2. The anvil roll 30 is installed so as to have the central axis of the shaft portion 35 be axis Ax2 (axis of rotation). The pair of small-diameter portions located at both ends of the shaft portion 35 may be rotatably supported by rotation support portions 62. The shaft portion 35 is made of metal, for example.

[0048] The main body portion 36 is the part that is cut by the cutting blade 11 of the cutter roll 10. The main body portion 36 is fixed to the shaft portion 35. The main body portion 36 is formed in an annular shape. The inner circumferential surface of the main body portion 36 is in contact with the outer circumferential surface of the corresponding portion of the shaft portion 35. The shaft portion 35 and the main body portion 36 may be assembled together after being formed individually. Unlike the example shown in Figure 6(b), the shaft portion 35 and the main body portion 36 may be formed integrally. Even in this case, the main body portion 36 is still fixed to the shaft portion 35. The main body portion 36 is made of metal, for example.

[0049] The outer diameter of the main body portion 36 is larger than the outer diameter of the large diameter portion of the shaft portion 35. The outer circumferential surface 36a of the main body portion 36 corresponds to a part of the outer circumferential surface 32 of the anvil roll 30. The cutting blade 11 (the cutting edge of the cutting blade 11) of the cutter roll 10 contacts the outer circumferential surface 36a of the main body portion 36. In the axial direction, the size of the main body portion 36 may match the size of the main body portion 16 of the cutter roll 10. The outer diameter of the main body portion 36 may be larger than the outer diameter of the main body portion 16.

[0050] The anvil roll 30 may have one or more vibration adjustment sections 40, or a pair of vibration adjustment sections 40. Each of the pair of vibration adjustment sections 40 is positioned differently from the main body 36 in the axial direction of axis Ax2. The pair of vibration adjustment sections 40 sandwich the main body 36 in the axial direction of axis Ax2. In this case, when observed along the axial direction of axis Ax2, one vibration adjustment section 40, the main body 36, and the other vibration adjustment section 40 are arranged in this order. Since the pair of vibration adjustment sections 40 have similar configurations and functions, one of the vibration adjustment sections 40 will be described.

[0051] The vibration adjustment section 40 has the function of suppressing vibrations transmitted to the anvil roll 30 (vibrations of the entire anvil roll 30). In other words, by providing the vibration adjustment section 40, vibrations transmitted to the anvil roll 30 are suppressed compared to when the vibration adjustment section 40 is not provided. The vibration adjustment section 40 includes an annular section 42 and a plurality of elastic bodies 44. The annular section 42 (second annular section) corresponds to the annular section 22 in the vibration adjustment section 20 of the cutter roll 10, and the plurality of elastic bodies 44 (plural second elastic bodies) correspond to the plurality of elastic bodies 24 in the vibration adjustment section 20.

[0052] The annular portion 42 is the part that surrounds the shaft portion 35 with a gap between it and the outer circumferential surface of the shaft portion 35. The annular portion 42 is formed in an annular shape, and its center coincides with the central axis of the shaft portion 35. The inner diameter of the annular portion 42 is larger than the outer diameter of the large diameter portion of the shaft portion 35. When observed in the circumferential direction around the axis Ax2, the size of the gap (space) between the inner circumferential surface of the annular portion 42 and the outer circumferential surface of the shaft portion 35 may be constant. The annular portion 42 is made of metal, for example.

[0053] At least a portion of the outer circumferential surface 32 of the anvil roll 30 may be formed by the outer circumferential surfaces 42a of the annular portion 42 (each outer circumferential surface 42a of the pair of annular portions 42) and the outer circumferential surface 36a of the main body portion 36. The relative size of the diameter of the outer circumferential surface 42a of the annular portion 42 and the diameter of the outer circumferential surface 36a of the main body portion 36 is set so as not to hinder the cutting process on the workpiece W. The diameter of the outer circumferential surface 42a of the annular portion 42 may be the same as the diameter of the outer circumferential surface 36a of the main body portion 36, or it may be smaller than the diameter of the outer circumferential surface 36a of the main body portion 36. Alternatively, the diameter of the outer circumferential surface 42a of the annular portion 42 may be larger than the diameter of the outer circumferential surface 36a of the main body portion 36. If the diameter of the outer circumferential surface 42a is larger than the diameter of the outer circumferential surface 36a, the difference between the two diameters may be smaller than the amount of protrusion of the cutting blade 11 from the outer circumferential surface 16a of the main body portion 16 in the cutter roll 10. If there is a difference between the diameter of the outer surface 42a of the annular portion 42 and the diameter of the outer surface 36a of the main body portion 36, the difference may be a few millimeters or less. In the axial direction of axis Ax2, the size of the annular portion 42 (one annular portion 42) may be smaller than the main body portion 36, the same as the main body portion 36, or larger than the main body portion 36.

[0054] Multiple elastic bodies 44 are provided to connect the shaft portion 35 and the annular portion 42 and are arranged in a line around the axis Ax2. Arranged in a line around the axis Ax2 means that the positions of the multiple elastic bodies 44 in the circumferential direction around the axis Ax2 are different. The number of multiple elastic bodies 44 arranged around the axis Ax2 is not limited as long as it is 2 or more, but for example it is 4. When observing a cross section perpendicular to the axial direction at a certain position in the axial direction of axis Ax2, multiple elastic bodies 44 may be arranged on the same cross section. In the axial direction of axis Ax2, for example, the positions of the centers of the multiple elastic bodies 44 arranged around axis Ax2 coincide with each other. Unlike the example shown in Figure 6(b), the positions of the multiple elastic bodies 44 in the axial direction of axis Ax2 are different, and their positions in the circumferential direction around axis Ax2 are also different (the multiple elastic bodies 44 may be arranged in a helical shape).

[0055] Multiple elastic bodies 44 (for example, four elastic bodies 44) may be arranged at equal intervals in the circumferential direction around the axis Ax2. Each of the multiple elastic bodies 44 may be rubber, a spring member, or a member other than rubber or a spring member. If an elastic body 44 is a spring member, the spring member may be a compression coil spring or a tension spring.

[0056] When multiple elastic bodies 44 arranged in the circumferential direction around axis Ax2 and positioned on the same cross-section perpendicular to the axial direction are considered as "one group of elastic bodies 44", multiple groups of elastic bodies 44 may be arranged in the axial direction of axis Ax2. The number of elastic bodies 44 in each group may differ or be the same. The circumferential positions of the elastic bodies 44 in each group may differ or be the same.

[0057] In the axial direction of axis Ax2, an annular portion may be provided next to one vibration adjustment section 40, to which the outer circumferential surface of one guide ring 13 of the cutter roll 10 makes contact, and an annular portion may be provided next to the other vibration adjustment section 40, to which the outer circumferential surface of the other guide ring 13 makes contact. Each of the pair of annular portions is made of, for example, metal. In one example, the entire outer circumferential surface 32 of the anvil roll 30 is formed by the outer circumferential surface 36a of the main body 36, the outer circumferential surfaces 42a of each of the annular portions 40 of the pair of vibration adjustment sections 40, and the outer circumferential surfaces of each of the pair of annular portions.

[0058] In Figure 6(a), "c" represents the axial distance (shortest distance) between the points of the anvil roll 30 that are supported by the pair of bearings of the rotation support section 62. The distance c may be 1.5 times or more, 1.7 times or more, 2.0 times or more, or 2.5 times or more the axial size of the main body 36. "d" represents the diameter of the outer circumferential surface 36a of the main body 36. c / d may be 1 / 2 or more, 1 / 1 or more, or 3 / 2 or more. Alternatively, c / d may be 2 / 1 or more, as illustrated in Figure 6(a).

[0059] [Differentiation] In the above example, vibration adjustment sections are provided on both the cutter roll 10 and the anvil roll 30 to suppress vibration, but it is also possible that a vibration adjustment section is provided on only one of the cutter roll 10 or the anvil roll 30 and not on the other. If the anvil roll 30 (first roll member) that can rotate around axis Ax2 (first axis) has one or more vibration adjustment sections 40, the cutter roll 10 (second roll member) that can rotate around axis Ax1 (second axis) does not need to have one or more vibration adjustment sections 20. If the cutter roll 10 has one or more vibration adjustment sections 20, the anvil roll 30 does not need to have one or more vibration adjustment sections 40.

[0060] The cutter roll 10 may be provided with two main body sections 16 and one vibration adjustment section 20. Each of the two main body sections 16 is provided with a cutting blade 11. In the axial direction of axis Ax1, the two main body sections 16 may be arranged with the vibration adjustment section 20 in between. In the cutter roll 10, the number of main body sections 16, the number of vibration adjustment sections 20, and the arrangement of these components can be appropriately changed according to the processing content of the workpiece W.

[0061] The anvil roll 30 may be provided with two main body sections 36 and one vibration adjustment section 40. Each of the two main body sections 36 is in contact with a cutting blade 11 provided on the corresponding main body section 16 of the cutter roll 10. In the axial direction of axis Ax2, the two main body sections 36 may be arranged with the vibration adjustment section 40 in between. In the anvil roll 30, the number of main body sections 36, the number of vibration adjustment sections 40, and the arrangement of these components can be appropriately changed according to the processing content of the workpiece W.

[0062] [Summary of this disclosure] The rotary die cutter (1) described above is a device that cuts a workpiece (W) with a cutting blade (11). This rotary die cutter (1) comprises a first roll member (10, 30) that is rotatable around a first axis (Ax1, Ax2) and has outer peripheral surfaces (12, 32) along the circumferential direction around the first axis (Ax1, Ax2), and a second roll member (30, 10) that is rotatable around a second axis (Ax2, Ax1) parallel to the first axis (Ax1, Ax2) and has outer peripheral surfaces (32, 12) along the circumferential direction around the second axis (Ax2, Ax1). A cutting blade (11) is provided on the outer peripheral surface of either the first roll member (10, 30) or the second roll member (30, 10). The first roll member (10, 30) includes a shaft portion (15, 35) that is rotatably supported around a first axis (Ax1, Ax2), a main body portion (16, 36) fixed to the shaft portion (15, 35) and subjected to cutting by a cutting blade (11), and a vibration adjustment portion (20, 40) positioned at a different location from the main body portion (16, 36) in the axial direction. The vibration adjustment portion (20, 40) includes an annular portion (22, 42) that surrounds the shaft portion (15, 35) with a gap between it and the outer circumferential surface of the shaft portion (15, 35), and a plurality of elastic bodies (24, 44) provided to connect the shaft portion (15, 35) and the annular portion (22, 42) and arranged around the first axis (Ax1, Ax2). In this rotary die cutter (1), the first roll member (10, 30), which functions as either a cutter roll on which a cutting blade (11) is provided, or an anvil roll that receives the cutting blade (11), includes a vibration adjustment section (20, 40) configured to suppress vibration. For example, it is thought that vibration is suppressed by the vibration adjustment section (20, 40), which includes an annular section (22, 42) and a plurality of elastic bodies (24, 44), performing movements that include an action to cancel out vibrations transmitted to the rotating first roll member (10, 30). In this configuration, the first roll member (10, 30) itself is provided with a mechanism for suppressing vibration, which is useful for achieving both vibration suppression and simplification of the device configuration.

[0063] In the rotary die cutter (1) described above, a cutting blade (11) may be provided on the outer circumferential surface (16a) of the main body (16) of the first roll member (10). The second roll member (30) may have a second shaft portion (35) that is rotatably supported around a second axis (Ax2), a second main body portion (36) fixed to the second shaft portion (35) and forming an outer circumferential surface (36a) that the cutting blade (11) contacts, and a second vibration adjustment portion (40) positioned at a different location from the second main body portion (36) in the axial direction of the second axis (Ax2). The second vibration adjustment section (40) may include a second annular section (42) that surrounds the second shaft section (35) with a gap between it and the outer surface of the second shaft section (35), and a plurality of second elastic bodies (44) that are provided to connect the second shaft section (35) and the second annular section (42) and are arranged around the second axis (Ax2). In this case, in addition to the first roll member (10) which functions as a cutter roll on which the cutting blade (11) is provided, the second roll member (30) which functions as an anvil roll that receives the cutting blade (11) is also provided with a vibration suppression mechanism. Therefore, it is useful in reducing the effects of vibrations that occur in the rotary die cutter (1).

[0064] In the rotary die cutter (1) described above, the multiple elastic bodies (24, 44) may be arranged at equal intervals in the circumferential direction around the axis (Ax1, Ax2). In this case, it is useful in reducing the unevenness in the degree of suppression in the circumferential direction when suppressing vibrations transmitted to the first roll member (10, 30) during rotation.

[0065] The cutter roll (10) described above is a component used in a rotary die cutter (1). The cutter roll (10) has a cutting blade (11) for cutting a workpiece (W), a shaft portion (15) formed to extend in one direction, a main body portion (16) that forms an outer peripheral surface (16a) along the circumferential direction around the central axis of the shaft portion (15), and a vibration adjustment portion (20) positioned at a different location from the main body portion (16) in the direction in which the shaft portion (15) extends. The cutting blade (11) is provided on the outer peripheral surface (16a) of the main body portion (16). The vibration adjustment portion (20) includes an annular portion (22) that surrounds the shaft portion (15) with a gap between it and the outer peripheral surface (15a) of the shaft portion (15), and a plurality of elastic bodies (24) that are provided to connect the shaft portion (15) and the annular portion (22) and are arranged around the central axis. In this cutter roll (10), a mechanism for suppressing vibration is provided within the cutter roll itself, which is useful for achieving both vibration suppression and simplification of the device configuration.

[0066] The anvil roll (30) described above is a component used in a rotary die cutter (1) that cuts a workpiece (W) with a cutting blade (11). The anvil roll (30) has a shaft portion (35) formed to extend in one direction, a main body portion (36) which forms an outer peripheral surface (36a) along the circumferential direction around the central axis of the shaft portion (35) and is cut by the cutting blade (11), and a vibration adjustment portion (40) which is positioned at a different location from the main body portion (36) in the direction in which the shaft portion (35) extends. The vibration adjustment portion (40) includes an annular portion (42) that surrounds the shaft portion (35) with a gap between it and the outer peripheral surface of the shaft portion (35), and a plurality of elastic bodies (44) that are provided to connect the shaft portion (35) and the annular portion (42) and are arranged around the central axis. This anvil roll (30) is equipped with a mechanism for suppressing vibrations, making it useful for achieving both vibration suppression and simplification of the device configuration. [Explanation of Symbols]

[0067] 1...Rotary die cutter, 10...Cutter roll, Ax1...Axis, 11...Cutting blade, 12...Outer surface, 15...Shaft section, 15a...Outer surface, 16...Main body section, 16a...Outer surface, 20...Vibration adjustment section, 22...Annular section, 22a...Outer surface, 24...Elastic body, 30...Anvil roll, Ax2...Axis, 32...Outer surface, 35...Shaft section, 36...Main body section, 36a...Outer surface, 40...Vibration adjustment section, 42...Annular section, 42a...Outer surface, 44...Elastic body.

Claims

1. A rotary die cutter that cuts a workpiece with a cutting blade, A first roll member is provided so as to be rotatable about a first axis and has an outer peripheral surface that is aligned with the circumferential direction about the first axis, The system comprises a second roll member that is rotatable around a second axis parallel to the first axis and has an outer circumferential surface along the circumferential direction around the second axis, The cutting blade is provided on the outer circumferential surface of either the first roll member or the second roll member. The first roll member is, A shaft portion that is rotatably supported around the first axis, A main body fixed to the shaft and subjected to cutting by the cutting blade, It has a vibration adjustment section that is positioned at a different location from the main body in the axial direction, The vibration adjustment unit is An annular portion surrounds the shaft portion with a gap between it and the outer surface of the shaft portion, A plurality of elastic bodies are provided to connect the shaft portion and the annular portion, and are arranged around the first axis, Rotary die cutter.

2. The cutting blade is provided on the outer circumferential surface of the main body portion of the first roll member. The second roll member is A second shaft portion is supported so as to be rotatable around the second axis, A second main body portion is fixed to the second shaft portion and forms the outer circumferential surface that the cutting blade contacts, It comprises a second vibration adjustment unit positioned at a different location from the second main body in the axial direction of the second axis, The second vibration adjustment unit is, A second annular portion surrounds the second shaft portion with a gap between it and the outer circumferential surface of the second shaft portion, The device includes a plurality of second elastic bodies arranged around the second axis, which are provided to connect the second axial portion and the second annular portion. The rotary die cutter according to claim 1.

3. The plurality of elastic bodies are arranged at equal intervals in the circumferential direction around the axis. The rotary die cutter according to claim 1 or 2.

4. A cutter roll used in a rotary die cutter, A cutting blade for cutting the workpiece, A shaft portion formed to extend in one direction, A main body portion that forms an outer circumferential surface along the circumferential direction around the central axis of the shaft portion, It has a vibration adjustment section which is positioned at a different location from the main body in the direction in which the shaft extends, The cutting blade is provided on the outer circumferential surface of the main body, The vibration adjustment unit is An annular portion surrounds the shaft portion with a gap between it and the outer surface of the shaft portion, It includes a plurality of elastic bodies arranged around the central axis, which are provided to connect the shaft portion and the annular portion. Cutter roll.

5. An anvil roll used in a rotary die cutter that cuts a workpiece with a cutting blade, A shaft portion formed to extend in one direction, The main body portion has an outer circumferential surface that follows the circumferential direction around the central axis of the shaft portion, and is subjected to cutting by the cutting blade, It has a vibration adjustment section which is positioned at a different location from the main body in the direction in which the shaft extends, The vibration adjustment unit is An annular portion surrounds the shaft portion with a gap between it and the outer surface of the shaft portion, It includes a plurality of elastic bodies arranged around the central axis, which are provided to connect the shaft portion and the annular portion. Anvil roll.

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