Cleaning device of rotary die cutter and rotary die cutter

Abstract

To provide a cleaning device which is excellent in removability of dust adhering to a roll of a rotary die cutter and easily keeps a cleaning member clean.SOLUTION: A cleaning device of a rotary die cutter is used for a rotary die cutter including a die cut roll and an anvil roll which are supported rotatably around axes parallel to each other and cleans an outer peripheral surface of the anvil roll. The cleaning device includes: a cleaning member which may slide on the outer peripheral surface of the anvil roll; and a movement mechanism which moves the cleaning member along an axis of the anvil roll.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cleaning device for a rotary die cutter and to a rotary die cutter. [Background technology]

[0002] Conventionally, rotary die cutters have been known that include a die cut roll and an anvil roll that are supported rotatably about parallel axes, and that cut a sheet workpiece fed between the die cut roll and the anvil roll. Patent Document 1 discloses a roll cleaning device for a rotary die cutter that cleans the outer peripheral surface of the anvil roll. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-098246 Summary of the Invention [Problem to be solved by the invention]

[0004] However, roll cleaning alone was not sufficient to remove the debris stuck to the rolls. Furthermore, with roll cleaning, the debris collected from the anvil roll would stick to the roll cleaner, so when debris accumulated on the roll cleaner, it was necessary to stop operation and clean the roll cleaner.

[0005] An object of the present invention is to provide a cleaning device that is excellent in removing debris adhering to the roll of a rotary die cutter and that also makes it easy to keep the cleaning member clean. An object of the present invention is to provide a rotary die cutter equipped with the above-mentioned cleaning device. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a rotary die cutter cleaning device for cleaning the outer surface of the anvil roll, which is used in a rotary die cutter comprising a die cut roll and an anvil roll rotatably supported about axes parallel to each other, and which cuts a sheet workpiece fed between the die cut roll and the outer surface of the anvil roll with cutting blades formed on the outer surface of the die cut roll, the roll cleaning device comprising a cleaning member that can slide on the outer surface of the anvil roll, and a moving mechanism that moves the cleaning member along the axis of the anvil roll.

[0007] With this configuration, the cleaning member can be moved along the axis of the anvil roll, so that the cleaning member that has scraped up debris from the surface of the anvil roll can be moved axially outward from the center of the anvil roll and sweep the scraped debris to the outside of the anvil roll, thereby sufficiently removing debris from the surface of the anvil roll. Furthermore, the cleaning member can be retracted to the outside of the anvil roll to remove debris adhering to the cleaning member, so the cleaning member itself can be kept clean for a long period of time.

[0008] The moving mechanism may be a screw mechanism including a screw shaft connected to the cleaning member directly or via another member, and a motor that rotates the screw shaft around its axis.

[0009] The moving mechanism may be a cylinder mechanism that is connected to the cleaning member directly or via another member.

[0010] According to one aspect of the present invention, there is provided a rotary die cutter including the above-described cleaning device. [Effects of the Invention]

[0011] According to one aspect of the present invention, there are provided a cleaning device that is excellent at removing debris adhering to the rolls of a rotary die cutter and that also makes it easy to keep the cleaning members clean, and a rotary die cutter equipped with the cleaning device. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a front view showing the rotary die cutter of the embodiment. [Figure 2] FIG. 10 is an explanatory diagram showing a modified example of the cleaning device together with the anvil roll. DETAILED DESCRIPTION OF THE INVENTION

[0013] FIG. 1 is a front view showing one embodiment of a rotary die cutter equipped with a cleaning device. The rotary die cutter 100 of this embodiment comprises a die-cut roll 1 and an anvil roll 2 having a multi-stage cylindrical outer shape that are rotatably supported in rotation directions T1 and T2 around parallel axes O1 and O2, a box-shaped frame 3 that supports the die-cut roll 1 and the anvil roll 2, and a cleaning device 5.

[0014] The rotary die cutter 100 rotates the die cut roll 1 and the anvil roll 2, and cuts the sheet work (not shown) supplied between the die cut roll 1 and the anvil roll 2 using cutting blades 1a formed on the outer surface of the die cut roll 1 in accordance with the shape of the cutting blades 1a.

[0015] The die-cut roll 1 has a central portion 1A having a cutting edge 1a, a support shaft portion 1BL extending outward along the axis O1 from the left end of the central portion 1A in the axial direction as shown, and a support shaft portion 1BR extending outward along the axis O1 from the right end of the central portion 1A in the axial direction as shown. The anvil roll 2 has a central portion 2A that sandwiches the workpiece between itself and the central portion 1A of the die-cut roll 1, a support shaft portion 2BL that extends outward along the axis O2 from the left end of the central portion 2A in the axial direction as shown, and a support shaft portion 2BR that extends outward along the axis O2 from the right end of the central portion 2A in the axial direction as shown.

[0016] The die-cut roll 1 is attached to the frame 3 with each of its two support shafts 1BL, 1BR rotatably supported by a die-cut roll housing 1C. The anvil roll 2 is attached to the frame 3 with each of its two support shafts 2BL, 2BR rotatably supported by an anvil roll housing 2C.

[0017] The die-cut roll 1 and the anvil roll 2 are arranged vertically, one above the other, with their respective axes O1 and O2 parallel to each other. A drive device (not shown) that rotates the die-cut roll 1 and the anvil roll 2 in rotation directions T1 and T2 can be connected to the support shafts 1BL and 1BR of the die-cut roll 1 and the support shafts 2BL and 2BR of the anvil roll 2. The drive device is connected to one of the four support shafts 1BL, 1BR, 2BL, and 2BR.

[0018] The frame 3 comprises a rectangular stand 3A laid on the floor, two side plates 3B extending vertically upward from both ends of the stand 3A in the longitudinal direction (left-right direction in the figure), and a top plate 3C connecting the upper ends of the two side plates 3B. The die-cut roll housing 1C is disposed above the side plates 3B, and the anvil roll housing 2C is disposed below the die-cut roll housing 1C.

[0019] The die-cut roll housing 1C is fixed to the side plate 3B. Meanwhile, the anvil roll housing 2C, together with the anvil roll 2, can be raised and lowered by hydraulic cylinder devices 4 provided under the side plates 3B at both ends of the frame 3A. By moving the anvil roll 2 up and down, the anvil roll 2 can be brought into contact with and separated from the die-cut roll 1.

[0020] In the die-cut roll 1, the inner periphery of the central portion 1A and the support shaft portions 1BL, 1BR are formed from a metal material such as steel. The outer periphery of the central portion 1A is formed from a hard material such as cemented carbide. The outer periphery of the central portion 1A, made of cemented carbide or the like, is fitted and integrated with the inner periphery of the central portion 1A by shrink fitting or the like. The central portion 1A of the die-cut roll 1 has bearer portions 1D at both ends in the direction of the axis O1. The bearer portions 1D are formed in the shape of flanges with a larger diameter than the inner portion of the central portion 1A in the direction of the axis O1. The outer diameter of the bearer portions 1D is approximately equal to the diameter of the cutting blade 1a.

[0021] The anvil roll 2 has a central portion 2A and support shaft portions 2BL and 2BR integrally formed from a metal material such as steel. The central portion 2A of the anvil roll 2 is made of a material with a lower hardness than the outer peripheral portion of the central portion 1A of the die-cut roll 1. The central portion 2A of the anvil roll 2 is cylindrical with a uniform outer diameter along the axis O2. The anvil roll 2 is moved toward the die-cut roll 1 by a hydraulic cylinder device 4 and positioned when the bearer portions 1D of the die-cut roll 1 contact and press against both ends of the central portion 2A of the anvil roll 2. A sheet-like workpiece is fed into the area between the two bearer portions 1D of the die-cut roll 1. The sheet-like workpiece fed between the central portion 1A of the die-cut roll 1 and the central portion 2A of the anvil roll 2 is pressed and cut between the cutting blade 1a of the die-cut roll 1 and the outer peripheral surface of the central portion 2A of the anvil roll 2.

[0022] In this embodiment, the support shaft 1BL located on the left side of the central portion 1A in the die-cut roll 1 is longer than the support shaft 1BR located on the right side of the central portion 1A in the illustration. Furthermore, the support shaft 2BL located on the left side of the central portion 2A in the illustration is longer than the support shaft 2BR located on the right side of the central portion 2A in the illustration. This configuration forms a standby area 60 between the central portions 1A, 2A and the side plate 3BL on the left side in the illustration, where a cleaning member 6 (described later) can be placed on standby outside the central portion 2A of the anvil roll 2.

[0023] The rotary die cutter 100 includes a cleaning device 5 that cleans the outer peripheral surface of the central portion 2A of the anvil roll 2, and a collection box 15 that collects the collected debris. The cleaning device 5 includes a cleaning member 6 that can slide on the outer peripheral surface of the central portion 2A of the anvil roll 2, an arm 7 that supports the cleaning member 6, and a screw mechanism 10 (moving mechanism) that is connected to the arm 7 and moves the arm 7 along the axis O2.

[0024] The cleaning member 6 is a wiper that wipes the surface of the anvil roll 2. An appropriate material is selected for the cleaning member 6, taking into consideration its sliding properties on the surface of the anvil roll 2 and its ability to remove workpiece debris adhering to the surface of the anvil roll 2. Various materials can be used for the cleaning member 6, such as nonwoven fabric, rubber, sponge, and resin.

[0025] The arm 7 is a rod-shaped member extending in the vertical direction. The cleaning member 6 is fixed to the upper end of the arm 7. The lower end of the arm 7 is provided with a female screw hole 7a that penetrates the arm 7 in the left-right direction in the figure (direction of the axis O2).

[0026] The screw mechanism 10 includes a screw shaft 11 extending along the axis O2, and a motor 12 connected to one end of the screw shaft 11 to rotate the screw shaft 11 about its axis. The screw mechanism 10 is fixed to the frame 3. The screw mechanism 10 may also be fixed to a member other than the frame 3.

[0027] The screw shaft 11 of the screw mechanism 10 is fitted into the female threaded hole 7a of the arm 7. The screw mechanism 10 rotates the screw shaft 11 around its axis using a motor 12, thereby horizontally moving the arm 7 connected to the screw shaft 11 along the axis O2. The axial length of the screw shaft 11 is greater than the length of the central portion 2A of the anvil roll 2 in the direction of the axis O2. The screw mechanism 10 can move the cleaning member 6 supported by the arm 7 from the region where the cleaning member 6 slides on the surface of the central portion 2A of the anvil roll 2 to a region (standby region 60) where the entire cleaning member 6 is located outside the central portion 2A.

[0028] The rotary die cutter 100 having the configuration described above includes a cleaning device 5 having a cleaning member 6 connected to the screw mechanism 10 via an arm 7, and the cleaning member 6 can slide on the surface of the anvil roll 2 to remove debris from the surface of the anvil roll 2. More specifically, by moving the cleaning member 6 from the end 2D on the right side of the central portion 2A in the drawing toward the end 2E on the left side in the drawing while rotating the anvil roll 2, the cleaning member 6 can scrape up debris from the surface of the central portion 2A. This allows debris adhering to the anvil roll 2 to be sufficiently removed.

[0029] Furthermore, by moving the cleaning member 6 to the standby area 60 outside the central portion 2A, the debris collected by the cleaning member 6 can be swept out from the end 2E on the left side of the central portion 2A in the figure to the outside of the central portion 2A. Because a collection box 15 that opens upward is disposed below the standby area 60 where the entire cleaning member 6 is located outside the central portion 2A, debris swept from the surface of the central portion 2A can be dropped into the collection box 15 and collected. Therefore, debris is less likely to accumulate on the cleaning member 6, and the cleaning member 6 can be kept clean for a long period of time.

[0030] In this embodiment, while the anvil roll 2 approaches the die-cut roll 1 by the hydraulic cylinder device 4 and the sheet work is being cut, the cleaning member 6 can be constantly brought into contact with the outer peripheral surface of the central portion 2A of the anvil roll 2 to perform cleaning.

[0031] The cleaning member 6 sweeps away debris from the end 2E of the central portion 2A of the anvil roll 2 to the outside on the left side in the figure, so even if the cleaning member 6 is removed from the central portion 2A while cutting the sheet-like workpiece, the scraped debris will not remain on the surface of the central portion 2A.

[0032] The cleaning device 5 may include a mechanism for removing debris adhering to the cleaning member 6. For example, a member for rubbing the surface of the cleaning member 6 may be disposed in the standby area 60. Alternatively, the cleaning device 5 may include a vibration mechanism for vibrating the cleaning member 6.

[0033] (Variation) Next, a modified cleaning device will be described with reference to Fig. 2. In the modified cleaning device, components common to the previous embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0034] FIG. 2 is a side view showing a modified example of the cleaning device together with the anvil roll 2. As shown in FIG. 2 includes a cleaning member 6, an arm 7, and a cylinder mechanism 20 (movement mechanism). The cylinder mechanism 20 includes a cylinder tube 21, ports 22 located at both ends of the cylinder tube 21, and a slider 24. The slider 24 is mechanically or magnetically connected to a piston (not shown) inside the cylinder tube 21. The lower end of the arm 7 that supports the cleaning member 6 is fixed to the slider 24.

[0035] The cylinder mechanism 20 is a rodless cylinder that moves a piston in the cylinder tube 21 by letting air in and out of the cylinder tube 21 via two ports 22, thereby moving a slider 24 connected to the piston in the length direction (direction along the axis O2) of the cylinder tube 21. By operating the cylinder mechanism 20, the cleaning member 6 can be moved left and right in the figure along the axis O2.

[0036] In the rotary die cutter 100 equipped with the modified cleaning device 5A, the cleaning member 6 can be moved left and right by the cylinder mechanism 20, so that, similar to the previous embodiment, debris adhering to the anvil roll 2 can be sufficiently removed. Moreover, since debris adhering to the cleaning member 6 can be removed in the standby area 60, it is easy to keep the cleaning member 6 clean.

[0037] The cylinder mechanism 20 is not limited to a rodless cylinder, but may be an air cylinder equipped with a piston rod. Furthermore, the mechanism for moving the cleaning member 6 may be a belt-driven direct-acting mechanism or a rack-and-pinion direct-acting mechanism. [Explanation of symbols]

[0038] 1...Die-cut roll 1a...cutting blade 1A,2A…Central part 1BL,1BR,2BL,2BR…Support shaft part 1C...Die-cut roll housing 1D...Bearer section 2...Anvil roll 2C...Anvil roll housing 2D, 2E…end 3...Frame 3A…Mounting stand 3B,3BL,3BR…Side plate 3C...top plate 4...Hydraulic cylinder device 5,5A…Cleaning device 6...Cleaning materials 7...Arm 7a...Female thread hole 10...Screw mechanism 11...Screw shaft 12...Motor 15...Collection box 20...Cylinder mechanism 21...Cylinder tube 22...Port 24...Slider 60…Standby area 100...Rotary die cutter O1,O2…axis line T1, T2...Rotation direction

Claims

1. A rotary die cutter includes a die cut roll and an anvil roll that are rotatably supported about axes parallel to each other, and cuts a sheet workpiece fed between the die cut roll and the anvil roll with cutting blades formed on the outer peripheral surface of the die cut roll. The rotary die cutter cleaning device cleans the outer peripheral surface of the anvil roll, a cleaning member that is slidable on the outer peripheral surface of the anvil roll; and a moving mechanism that moves the cleaning member along the axis of the anvil roll. Cleaning device for rotary die cutters.

2. The moving mechanism is a screw mechanism including a screw shaft connected to the cleaning member directly or via another member, and a motor that rotates the screw shaft around its axis. The cleaning device for a rotary die cutter according to claim 1.

3. the moving mechanism is a cylinder mechanism connected to the cleaning member directly or via another member; The cleaning device for a rotary die cutter according to claim 1.

4. A rotary die cutter comprising the cleaning device according to any one of claims 1 to 3.

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