JP2013027642A - Cutter device for workpiece for absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cutting property of a cutter blade by effectively suppressing deflection at the center part of an anvil roll while maintaining the posture of the anvil roll with respect to a cutter roll in an excellent state.SOLUTION: A cutter device for a workpiece for an absorptive article includes: a cutter roll 20 in which a cutter blade 21 is provided in a projected fashion; an anvil roll 40 for receiving the cutter blade by an outer peripheral surface disposed facing the cutter roll 20; and a backup roll 50 for suppressing the deflection deformation of the anvil roll 40 by being abutted on the outer peripheral surface of the anvil roll 40 at a prescribed abutting part 55 and pressurizing the anvil roll 40. On a position on the end side of the cutter roll 20a in a direction along a rotation axis C20, an annular projection 25 to be abutted on the outer peripheral surface of the anvil roll 40 is provided. The abutting part 55 of the backup roll 50 is positioned at both ends in a direction along a rotation axis C50, and also positioned closer to the center side than the annular projection 25 in the direction along a rotation axis C50.

Description

  The present invention relates to a cutter device for cutting a workpiece of an absorbent article such as a disposable diaper.

  Conventionally, in a production line for absorbent articles such as disposable diapers, a part of the workpiece 1a, such as a nonwoven fabric, is punched, cut, or divided into product units while the workpiece 1a is being transported in the transport direction. Etc. are performed. That is, the work 1a is cut. This is done by the rotary die cutter device 110.

  As shown in the schematic front view of FIG. 1, the cutter device 110 includes a cutter roll 20 in which a cutter blade 21 protrudes from an outer peripheral surface 20 s and a smooth anvil roll 40 that receives the cutter blade 21. Then, while rotating the cutter roll 20 and the anvil roll 40 along the conveying direction of the workpiece 1a (direction passing through the paper surface of FIG. 1), the gap Gr between these rolls 20 and 40 (hereinafter also referred to as roll gap Gr). The workpiece 1a is cut by passing the workpiece 1a.

  Here, the cutter roll 20 has bearer portions 25 and 25. The bearer portions 25 and 25 are annular convex portions projecting annularly along the circumferential direction at both end portions of the outer peripheral surface 20s, and by bringing the bearer portions 25 and 25 into contact with the outer peripheral surface 40s of the anvil roll 40, It has a function of transmitting rotational torque from one roll 20 (40) to the other roll 40 (20).

  Further, the cutting force is applied to the cutter blade 21 by hydraulic cylinders 17 and 17 provided at both ends in the direction along the rotation axis C20 of the cutter roll 20 (hereinafter also referred to as the rotation axis direction C20). That is, a cutting force is applied to the cutter blade 21 by pressing the anvil roll 40 toward the cutter roll 20 with the hydraulic cylinders 17 and 17.

  However, at this time, due to pressing the cutter roll 20 at both ends in the rotation axis direction C20 as shown in FIG. 1, as shown by the two-dot chain line, the roll is rolled at the central portion P110 in the rotation axis direction C20. The rolls 20 and 40 are easily bent and deformed so that the gap Gr is opened, and the cutting performance of the cutter blade 21 is deteriorated.

  As a method for suppressing the bending deformation of the roll 40, in Patent Document 1, as shown in FIGS. 2A and 2B, a backup roll 250 is disposed to face the outer peripheral surface 40s of the anvil roll 40, and the backup roll 250 is attached to the anvil. It is shown that the anvil roll 40 is pushed toward the cutter roll 20 by being brought into contact with the roll 40.

  As an example of the arrangement of the backup roll 250, only one backup roll 250 is arranged at the central portion P110 in the rotation axis direction C20 as shown in FIG. 2A, or the cutter roll with respect to the rotation axis direction C20 as shown in FIG. 2B. It is disclosed that backup rolls 250 are arranged at the same positions as the positions of the 20 bearer portions 25 and 25, respectively.

JP 2001-62775 A

  However, in the former example, as shown in FIG. 2A, the backup roll 250 abuts and presses against the anvil roll 40 only at one point in the central portion P110 in the rotation axis direction C20. There is a possibility that the 40 rotation axes C40 may be inclined from a parallel state with respect to the rotation axis C20 of the cutter roll 20, that is, there is a problem in the posture stability of the rolls 20 and 40.

  In the latter example, as shown in FIG. 2B, the contact positions of the backup rolls 250, 250 with the anvil roll 40 are the same positions as the bearer portions 25, 25 of the cutter roll 20, The pressing force applied from the backup rolls 250 and 250 to the anvil roll 40 through the contact position is not effectively transmitted to the central portion P40 of the anvil roll 40, and as a result, the deflection of the central portion P40 of the anvil roll 40 is effective. Can not be suppressed.

  The present invention has been made in view of the conventional problems as described above, and the object thereof is to effect the deflection of the center portion of the anvil roll while maintaining the posture of the anvil roll with respect to the cutter roll in a good state. Therefore, the cutting performance of the cutter blade is improved.

The main invention for achieving the above object is:
A cutter device for cutting a workpiece of an absorbent article conveyed in a conveyance direction,
A cutter roll that rotates around a rotation axis along a direction intersecting the transport direction and is provided with a cutter blade protruding from the outer peripheral surface;
An anvil roll that rotates in conjunction with the cutter roll and receives the cutter blade by an outer peripheral surface disposed opposite to the outer peripheral surface of the cutter roll;
A backup roll that suppresses bending deformation of the anvil roll by pressing the anvil roll by contacting the outer peripheral surface of the anvil roll at a predetermined contact portion;
An annular convex portion that protrudes from the outer peripheral surface and contacts the outer peripheral surface of the anvil roll at a position closer to the end side in the direction along the rotation axis than the position of the cutter blade in the outer peripheral surface of the cutter roll. Is provided,
The contact portion of the backup roll is located at both ends in the direction along the rotation axis, and is located on the center side of the annular convex portion in the direction along the rotation axis. It is the cutter apparatus of the workpiece | work of an absorbent article.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, while maintaining the posture of the anvil roll with respect to the cutter roll in a good state, it is possible to effectively suppress the bending of the central portion of the anvil roll and improve the cutting performance of the cutter blade.

It is a schematic front view of the conventional cutter apparatus 110. FIG. 2A and 2B are schematic front views of conventional cutter devices 110a and 110b that can suppress the bending of the anvil roll 40, respectively. FIG. 3A is a schematic front view of the cutter device 10 according to the present embodiment, and FIG. 3B is a side view thereof. It is a schematic top view which shows a mode that the cutter apparatus 10 punches the semi-finished product 1a. It is explanatory drawing of the installation position of the CD direction of the bearer part 55 of the backup roll 50. FIG. 3 is an enlarged view of the right half of the cutter device 10. FIG. It is explanatory drawing of the positional relationship of the CD direction of the cutter blade 21 and the bearer part 55. FIG. It is a schematic front view of the cutter apparatus 10a which concerns on other embodiment.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

A cutter device for cutting a workpiece of an absorbent article conveyed in a conveyance direction,
A cutter roll that rotates around a rotation axis along a direction intersecting the transport direction and is provided with a cutter blade protruding from the outer peripheral surface;
An anvil roll that rotates in conjunction with the cutter roll and receives the cutter blade by an outer peripheral surface disposed opposite to the outer peripheral surface of the cutter roll;
A backup roll that suppresses bending deformation of the anvil roll by pressing the anvil roll by contacting the outer peripheral surface of the anvil roll at a predetermined contact portion;
An annular convex portion that protrudes from the outer peripheral surface and contacts the outer peripheral surface of the anvil roll at a position closer to the end side in the direction along the rotation axis than the position of the cutter blade in the outer peripheral surface of the cutter roll. Is provided,
The contact portion of the backup roll is located at both ends in the direction along the rotation axis, and is located on the center side of the annular convex portion in the direction along the rotation axis. Absorbent article workpiece cutter device.

According to the cutter device for a workpiece of such an absorbent article, the contact portion of the backup roll with the anvil roll is located more centrally than the annular convex portion of the cutter roll in the direction along the rotation axis. Therefore, the pressing force from the backup roll is effectively transmitted to the central portion of the anvil roll through the contact portion, and as a result, the bending of the central portion of the anvil roll is more directly and selectively suppressed, thereby reducing the cutter blade. Can improve the cutting ability.
Moreover, the said contact part is provided in the position of the both ends of the direction in alignment with a rotating shaft, and, thereby, a backup roll can be pressed toward a cutter roll, supporting both ends of an anvil roll. Therefore, it is easy to maintain the posture of the anvil roll with respect to the cutter roll in a desired good state (for example, a parallel state), and this also contributes to the improvement of the cutting property.

A cutter device for a workpiece of such an absorbent article,
It is desirable that the contact portion of the backup roll does not partially overlap the annular convex portion in the direction along the rotation axis.
According to such a workpiece cutter device of an absorbent article, the contact portion of the backup roll is not partially overlapped with the annular convex portion, so the pressing force from the backup roll is the annular convex portion of the cutter roll. It is efficiently and reliably transmitted to the central part of the anvil roll without being obstructed by the part. As a result, it is possible to further directly and selectively suppress the bending of the central portion of the anvil roll and further improve the cutting performance of the cutter blade.

A cutter device for a workpiece of such an absorbent article,
It is desirable that the contact portion of the backup roll abuts on a portion of the outer peripheral surface of the anvil roll that does not face the cutter blade.
According to the workpiece cutter device of such an absorbent article, the contact portion of the backup roll does not come into contact with the portion of the outer peripheral surface of the anvil roll that receives the cutter blade. Therefore, the damage by contact | abutting with the backup roll of the site | part which receives the said cutter blade can be prevented effectively, As a result, it becomes possible to suppress the fall of the cutting property of a cutter blade.

A cutter device for a workpiece of such an absorbent article,
The backup roll has a second annular convex portion protruding from the outer peripheral surface thereof as the contact portion at both ends in the direction along the rotation axis, respectively.
Regarding the direction along the rotation axis, each of the second annular convex portions is preferably arranged between the position of the cutter blade of the cutter roll and the position of the annular convex portion of the cutter roll. .
According to such a workpiece cutter device of an absorbent article, the posture of the anvil roll with respect to the cutter roll is maintained in a desired state, and the deflection of the center portion of the anvil roll is more directly and selectively performed. It can suppress and can prevent more effectively the damage by contact | abutting with the backup roll of the site | part which receives a cutter blade among the outer peripheral surfaces of an anvil roll.

=== This Embodiment ===
3A and 3B are explanatory diagrams of the cutter device 10 according to the present embodiment. 3A is a schematic front view of the cutter device 10, and FIG. 3B is a side view thereof. FIG. 4 is a schematic top view showing how the cutter device 10 punches the semi-finished product 1a.
As shown in FIG. 4, the cutter device 10 is used in a production line for a pants-type disposable diaper 1 as an example of an absorbent article. And in this example, the cutter apparatus 10 is the circumference | surroundings of the leg of the diaper 1 with the product pitch P1 of the diaper 1 to the semi-finished product 1a (equivalent to a workpiece | work) of flexible continuous sheet-like members, such as a nonwoven fabric continuously conveyed in a conveyance direction. Opening 1h is formed by punching.

  However, the semi-finished product 1a is not limited to a continuous sheet-like member, that is, the semi-finished product 1a may be separately conveyed in units corresponding to the product of the diaper 1. In this case, a suction conveyor (a belt conveyor having a suction function on the mounting surface) or the like is used as a transport mechanism for transporting the semi-finished product 1a, instead of the transport roller 101. Further, the mode of cutting the semi-finished product 1a is not limited to punching, and the continuous sheet-like member may be divided into product units, or only a part of the semi-finished product 1a may be cut.

  Hereinafter, the conveyance direction of the semi-finished product 1a is also referred to as “MD direction”, and among the directions orthogonal to the MD direction, the direction that is not the thickness direction of the semi-finished product 1a (the semi-finished product 1a is a continuous sheet-like member). In this case, the width direction of the sheet-like member) is also referred to as “CD direction”. As for the CD direction, one side is also referred to as the left side and the other side as the right side.

  As shown in FIGS. 3A and 3B, the cutter device 10 has a three-stage roll configuration in which three rolls 20, 40, and 50 are sequentially stacked in the vertical direction. That is, the cutter device 10 is disposed adjacent to the cutter roll 20 as an upper roll supported rotatably around the rotation axis C20 parallel to the CD direction via the bearing member 12, and below the cutter roll 20. An anvil roll 40 as a middle roll supported rotatably around a rotation axis C40 parallel to the CD direction via the member 13 and adjacent to the lower part of the anvil roll 40, and in the CD direction via the bearing member 14 It has a backup roll 50 as a lower roll supported rotatably around a parallel rotation axis C50, and a drive mechanism 60 that drives and rotates at least one of the cutter roll 20 or the anvil roll 40.

  When the semi-finished product 1a is passed along the MD direction between the cutter roll 20 and the anvil roll 40 that are driven to rotate along the MD direction as the conveying direction, the cutter blade on the outer peripheral surface 20s of the cutter roll 20 is passed. 21 and the outer peripheral surface 40s of the anvil roll 40 sandwich the semi-finished product 1a, and the semi-finished product 1a is formed with a leg opening 1h. In addition, although mentioned later in detail, the backup roll 50 contacts the outer peripheral surface 40s of the anvil roll 40 from below and presses the roll 40 toward the cutter roll 20. Therefore, the downward bending deformation of the central portion P40 of the anvil roll 40 is suppressed, and the cutting performance of the cutter device 10 is favorably maintained. Further, the punched piece that has been punched is separated from the semi-finished product 1a by an appropriate collection mechanism (not shown), and discharged and collected outside the production line.

  Incidentally, when the cutter roll 20 and the anvil roll 40 rotate in the MD direction as described above, the rotation direction around the rotation axis C20 of the cutter roll 20 (counterclockwise in the example of FIG. 3B) and the backup. The rotation direction around the rotation axis C50 of the roll 50 is the same as each other, but the rotation direction around the rotation axis C40 of the anvil roll 40 (clockwise in the example of FIG. 3B) is the rotation direction of these rolls 20 and 50. The opposite direction. Further, the direction (rotational axis direction) along each of the rotation axes C20, C40, and C50 described above is parallel to the CD direction. Hereinafter, each component 20, 40, 50, 60 will be described.

The cutter roll 20 includes a roll body 22 that is a roll body, and small-diameter portions 23 and 23 that are concentrically formed at both ends in the CD direction. The bearing member 12 described above is disposed in each small diameter portion 23. On the other hand, a cutter blade 21 is provided at the center portion P20 in the CD direction on the outer peripheral surface 20s of the roll body portion 22. The cutter blade 21 is provided so as to protrude from the outer peripheral surface 20s following the shape of the leg periphery opening 1h, which is the shape to be punched, so that the cutter blade 21 is closed corresponding to the shape of the leg periphery opening 1h. Region A21 is defined on the outer peripheral surface 20s. Hereinafter, the closed region A21 including the cutter blade 21 inside is also referred to as a cutter blade partition region A21.
Further, the turning radius of the tip of the cutter blade 21 is set to be approximately equal to, for example, a value obtained by dividing the product pitch P1 of the diaper 1 by 2π (a value that is twice the circumference). When the cutter roll 20 rotates once, the semi-finished product 1a is sent in the MD direction by a length P1 substantially corresponding to one piece of the product.

  As shown in FIG. 3A, a pair of bearer portions 25 and 25 (corresponding to an annular convex portion) are integrally provided on the outer peripheral surface 20 s of the roll body portion 22 of the cutter roll 20. The bearer portion 25 is a large-diameter portion provided along the circumferential direction at both ends of the roll body portion 22 in the CD direction. And at the time of the steady operation of the cutter apparatus 10, the said bearer parts 25 and 25 are press-contacted to the outer peripheral surface 40s of the anvil roll 40 by the peripheral surface 25s. The radius of the peripheral surface 25s of the bearer portion 25 is set to be equal to, for example, the rotational radius of the tip of the cutter blade 21 or smaller by the amount of bending deformation of the cutter blade 21 due to the cutting load at the time of cutting. However, as long as the peripheral surface 25s of the bearer portion 25 can be pressed into contact with the outer peripheral surface 40s of the anvil roll 40 without hindering the cutting performance of the cutter blade 21, it is not limited to the above-mentioned equivalent values. The radius of the peripheral surface 25s of 25 may be larger than the radius of rotation of the cutter blade 21.

  Incidentally, as can be understood from the above description, the peripheral surface 25s of the bearer portion 25 is in contact with the outer peripheral surface 40s of the anvil roll 40 in a microscopic manner, but the peripheral surface 25s is a part of the bearer portion 25. Therefore, it can be said that the bearer portion 25 is in contact with the outer peripheral surface 40s of the anvil roll 40 macroscopically. Therefore, in the following description, it may be said as such. For example, the fact that the peripheral surface 25 s of the bearer portion 25 abuts on the outer peripheral surface 40 s of the anvil roll 40 is simply referred to as “the bearer portion 25 abuts on the anvil roll 40”, or the peripheral surface 25 s of the bearer portion 25 The width W25 in the CD direction may be simply referred to as “the width W25 of the bearer portion 25”.

  The anvil roll 40 also has a roll body portion 42 that is a roll body and small diameter portions 43 and 43 that are concentrically formed at both ends in the CD direction. The bearing member 13 described above is disposed in each small diameter portion 43. The roll body 42 is, for example, a flat roll whose outer peripheral surface 40s is flat in the CD direction. That is, in this example, the radius of the roll body 42 is the same diameter over substantially the entire length in the CD direction. However, the roll profile (contour shape) of the outer peripheral surface 40 s of the roll body 42 may be changed from flat as long as the cutting performance of the cutter blade 21 and the press contact with the bearer portion 25 (55) are not hindered.

  The backup roll 50 also has a roll body 52 that is a roll body, and small-diameter portions 53 and 53 that are concentrically formed at both ends in the CD direction. Each small diameter portion 53 is provided with the bearing member 14 described above. On the other hand, a pair of bearer portions 55 and 55 (corresponding to a second annular convex portion and a contact portion) are integrally provided on the outer peripheral surface 50 s of the roll body portion 52. These bearer portions 55 and 55 are also similar in structure to the bearer portion 25 of the cutter roll 20 described above, that is, large diameter portions provided along the circumferential direction at both ends of the roll body portion 52 in the CD direction. is there. In the steady operation of the cutter device 10, the bearer portions 55 and 55 are pressed against the outer peripheral surface 40 s of the anvil roll 40.

  In addition, the arrangement position of the bearer portions 55 and 55 in the CD direction greatly affects the deflection suppressing function of the anvil roll 40 that is a required function for the backup roll 50, and in turn affects the cutting performance of the cutter blade 21, This will be described later.

  Similarly to the case of the cutter roll 20 described above, microscopically speaking, the peripheral surface 55s of the bearer portion 55 is in contact with the outer peripheral surface 40s of the anvil roll 40, but the peripheral surface 55s is the bearer portion. Since it is a part of 55, it can be said that the bearer part 55 is contacting the outer peripheral surface 40s of the anvil roll 40 macroscopically. Therefore, in the following description, it may be said as such. For example, the fact that the peripheral surface 55s of the bearer portion 55 contacts the outer peripheral surface 40s of the anvil roll 40 is simply referred to as “the bearer portion 55 contacts the anvil roll 40” or the peripheral surface 55s of the bearer portion 55 The width W55 in the CD direction may be simply referred to as “the width W55 of the bearer portion 55”.

  In such three rolls 20, 40, 50, the roll bodies 22, 42 adjacent to each other in the vertical direction are brought into contact with each other by the press contact mechanism such as the hydraulic cylinders 17, 17. (42, 52). That is, the rolls 20 and 40 are press-contacted by the roll body portions 22 and 42, and the rolls 40 and 50 are press-contacted by the roll body portions 42 and 52.

  If it demonstrates in more detail with reference to FIG. 3A and 3B, the cutter apparatus 10 has the housing member 15 for supporting these rolls 20,40,50. The housing member 15 has a pair of substantially rectangular frames 15a and 15a standing on both sides in the CD direction. Inside each frame 15a, a small diameter portion 23 of the cutter roll 20 and a small diameter of the anvil roll 40 are provided. The portion 43 and the small diameter portion 53 of the backup roll 50 are arranged side by side in the state of the upper middle step and the lower step in a state of being fitted to the corresponding bearing members 12, 13, and 14, respectively. Further, hydraulic cylinders 17 and 17 are interposed between the bearing members 14 and 14 of the lower backup roll 50 and the corresponding frames 15a and 15a, respectively. By operation, the backup roll 50 is supported by the bearing members 14 and 14 so as to be vertically movable. Therefore, if the hydraulic pressure value of the hydraulic oil that operates the hydraulic cylinders 17 and 17 is set as appropriate, the backup roll 50 obtains a reaction force from the frame bodies 15a and 15a, and with the pressure contact force according to the hydraulic pressure value itself 50 The anvil roll 40 is pushed up toward the upper cutter roll 20 through the bearer portions 55, 55, and the cutter roll 20 obtains a lower reaction force from the frame bodies 15a, 15a. 20 and the anvil roll 40 are press-contacted by roll body portions 22 and 42. The hydraulic cylinder 17 may be interposed between each bearing member 12 of the upper cutter roll 20 and each corresponding frame 15a. Further, as a pressure contact mechanism, an air cylinder or an electric feed screw mechanism may be used instead of the hydraulic cylinder 17.

  As shown in FIG. 3A, a drive mechanism 60 that drives and rotates the cutter roll 20 and the like includes a motor (not shown) as a drive source, and a drive rotation shaft of the motor to transmit the drive rotational force of the motor to the cutter roll 20. A shaft coupling 61 such as a universal joint that concentrically connects the end of the cutter roll 20, and a drive transmission gear 63 that transmits the driving rotational force of the cutter roll 20 to the anvil roll 40 to drive and rotate the anvil roll 40. 63. The drive transmission gears 63 and 63 are provided at both the end of the small diameter portion 23 of the cutter roll 20 and the end of the small diameter portion 43 of the anvil roll 40, respectively, and the gears 63 and 63 mesh with each other to drive rotation. Force is transmitted to the anvil roll 40. As a result, the anvil roll 40 rotates in conjunction with the cutter roll 20.

  However, the configuration example of the drive mechanism 60 is not limited to that described above. For example, the drive transmission gears 63 and 63 are not provided, and the cutter roll 20 is brought into contact with the bearer portion 25 from the cutter roll 20 to the anvil roll 40. May be applied to the anvil roll 40 without connecting a motor as a drive source to the cutter roll 20, or the cutter roll 20 and the anvil roll. Both 40 may be connected to corresponding drive sources.

  Further, in this example, the backup roll 50 is configured as a driven roll that rotates with the anvil roll 40 by abutting with the anvil roll 40 at the bearer portions 55, 55. It is not limited to this, and it may be driven and rotated by a motor as a drive source, or a concentric gear is provided at the end of the backup roll 50, and the drive transmission gear 63 at the end of the anvil roll 40 is provided. The rotational force may be obtained by meshing.

  By the way, as described above with reference to FIG. 1, when the semi-finished product 1a is punched with the cutter blade 21, the cutter roll 20 and the anvil roll are set so that the reaction force of the cutting force of the cutter blade 21 opens the roll gap Gr. Therefore, the cutter roll 20 bends upward at the center portion P20 in the CD direction, while the anvil roll 40 bends downward at the center portion P40. If the amount of bending deformation is large, the desired cutting force cannot be ensured and the cutting performance of the cutter blade 21 is lowered. In the worst case, the semi-finished product 1a is missed.

  Therefore, in the cutter device 10 of FIGS. 3A and 3B, the anvil roll 40 is pressed toward the upper cutter roll 20 by the backup roll 50 disposed opposite to the lower side of the anvil roll 40, and by this pressing force, The downward deformation of the central portion P40 of the anvil roll 40 is suppressed.

  However, this pressing force is applied to the anvil roll 40 only through the bearer portions 55 and 55 of the backup roll 50. Therefore, the installation position of the bearer portions 55, 55 in the CD direction affects not only the ability to suppress the bending deformation of the central portion P40 of the anvil roll 40 but also the posture of the anvil roll 40, and finally the cutter blade 21 is affected.

Therefore, in the present embodiment, some contrivances are made with respect to the installation position in the CD direction of the bearer portions 55 and 55 of the backup roll 50. Hereinafter, these devices will be described.
FIG. 5 is an explanatory diagram of the installation position in the CD direction of the bearer unit 55 of the backup roll 50 according to the present embodiment.

  First, as a first device, the bearer portions 55 and 55 of the backup roll 50 are provided at both ends in the CD direction, respectively. Therefore, the backup roll 50 can be stably pushed upward toward the cutter roll 20 while supporting the anvil roll 40 at both ends. That is, since the anvil roll 40 is pushed up to the backup roll 50 in a state where both ends are supported, the posture of the anvil roll 40 with respect to the cutter roll 20 is maintained in a state where the rotation axes C20 and C40 are in a good posture state. As a result, the cutting performance of the cutter blade 21 can be improved.

  In addition, the pair of bearer portions 55 and 55 are disposed at positions that sandwich the cutter blade 21 of the cutter roll 20 from both sides in the CD direction. That is, one bearer portion 55 is positioned at the left end portion closer to one end in the CD direction than the cutter blade 21, and the other bearer portion 55 is the right end closer to the other end in the CD direction than the cutter blade 21. Located in the department. Therefore, these bearer parts 55 and 55 can press the outer peripheral surface 40s of the roll 40 against the cutter blade 21 while supporting the anvil roll 40 at positions corresponding to the positions on both sides of the cutter blade 21. Thereby, the outer peripheral surface 40s of the anvil roll 40 can be brought into contact with the cutter blade 21 with a substantially symmetrical pressure distribution in the left and right directions in the CD direction, which also contributes to improvement of the cutting performance of the cutter blade 21.

  As a second device, the bearer portions 55 and 55 of the backup roll 50 are arranged closer to the center side in the CD direction than the bearer portions 25 and 25 of the cutter roll 20. Therefore, the upward pressing force from the backup roll 50 is efficiently transmitted to the center portion P40 in the CD direction of the anvil roll 40 without being obstructed by the bearer portion 25 of the cutter roll 20. As a result, the downward bending of the central portion P40 of the anvil roll 40 can be more directly and selectively suppressed, and the cutting performance of the cutter blade 21 can be enhanced.

  Incidentally, in the example of FIG. 5, both the bearer portions 55 and 25 of the backup roll 50 and the cutter roll 20 have predetermined widths W55 and W25 in the CD direction. The part 55 is located closer to the center in the CD direction than the bearer part 25 in a state where a part of the part 55 does not overlap the bearer part 25 of the cutter roll 20 with respect to the position in the CD direction. That is, the bearer portion 55 of the backup roll 50 is located on the center side in the CD direction from the bearer portion 25 of the cutter roll 20 over the entire portion (the entire width of the peripheral surface 55s). Therefore, the upward pressing force from the backup roll 50 can be transmitted to the central portion P40 of the anvil roll 40 in the CD direction more efficiently.

However, the concept of the present invention is not limited to the above-described configuration that does not completely overlap. That is, as long as the bearer portion 55 of the backup roll 50 is positioned closer to the center side in the CD direction than the bearer portion 25 of the cutter roll 20, a part 55 f of the bearer portion 55 overlaps the bearer 25. Also good. FIG. 6 is an explanatory view thereof, and is an enlarged view of the right half portion of the cutter device 10.
As can be seen from FIG. 6, in this example, a part 55 f of the bearer portion 55 of the backup roll 50 overlaps the bearer portion 25 of the cutter roll 20 with respect to the position in the CD direction. In the case of this configuration, desirably, the center position P55 of the width W55 of the bearer portion 55 of the backup roll 50 is more central in the CD direction than the center position P25 of the width W25 of the bearer portion 25 of the cutter roll 20 Good location.

  If it becomes like this, transmission to the center part P40 of the anvil roll 40 of the pressing force of the bearer part 55 of the backup roll 50 will become difficult to be inhibited by the bearer part 25 of the cutter roll 20, As a result, the anvil roll 40 The downward deformation of the central portion P40 can be effectively suppressed. Incidentally, it goes without saying that the above-described configuration (the configuration in FIG. 5) that does not overlap is most preferable from the viewpoint of the transmission of this pressing force to the central portion P40 of the anvil roll 40.

  Further, desirably, as shown in the schematic front view of FIG. 7, the bearer portion 55 of the backup roll 50 is partially over the cutter blade 21 (cutter blade partition region A21) of the cutter roll 20 with respect to the position in the CD direction. It should be arranged so as not to wrap. That is, the bearer portion 55 may be brought into contact with a portion A40 that does not face the cutter blade 21 (cutter blade partition region A21) in the outer peripheral surface 40s of the anvil roll 40. In the example of FIG. 7, each bearer portion 55 of the backup roll 50 is disposed between the position of the cutter blade 21 of the cutter roll 20 and the position of the bearer portion 25 of the cutter roll 20 with respect to the position in the CD direction. .

  And if it arrange | positions in this way, the bearer part 55 of the backup roll 50 will be in the site | part 40sr which receives the cutter blade 21 in the outer peripheral surface 40s of the anvil roll 40, ie, the site | part 40sr used as the receiving blade of the cutter blade 21. It will not come into contact. Therefore, it is possible to surely prevent the bearer portion 55 from coming into contact with the portion 40sr to be the receiving blade and damage the portion 40sr, and as a result, it is possible to effectively suppress a decrease in the cutting performance of the cutter blade 21. Become.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible.

  In the above-described embodiment, as an example of the absorbent article, the disposable diaper 1 that is attached to the object to be worn and absorbs the excretory fluid thereof is illustrated. However, anything that absorbs excreted fluid such as urine and menstrual blood can be used. For example, a sanitary napkin or a pet sheet that absorbs the excretory fluid of the pet may be used.

  In the above-described embodiment, the three-stage roll configuration in which the cutter roll 20, the anvil roll 40, and the backup roll 50 are sequentially stacked is shown as an example of the cutter device 10, but the present invention is not limited to this, and the backup roll is further limited. You may increase the number of For example, a backup roll that suppresses the deflection of the cutter roll 20 may be stacked above the cutter roll 20 to form a four-stage roll, or another backup roll may be stacked below the backup roll 50.

  In the above-described embodiment, the backup roll 50 that suppresses downward deformation of the anvil roll 40 is configured as a single roll, but the present invention is not limited to this. For example, as shown in FIG. 8, two rolls 150a and 150a each having a narrow outer peripheral surface 150as are arranged at both ends in the CD direction, and a single backup roll 150 is configured by these two. good. That is, you may make it function as one backup roll 50a which suppresses the bending deformation below the anvil roll 40 by combining the two rolls 150a and 150a. Incidentally, in this case, since the outer peripheral surface 150as of each roll 150a serves as a contact portion that contacts the outer peripheral surface 40s of the anvil roll 40, there is no configuration corresponding to the bearer portions 55 and 55 of FIG. The rolls 150a and 150a are arranged closer to the center than the bearers 25 and 25 of the cutter roll 20 with respect to the CD direction. Further, in the example of FIG. 8, each roll 150a, Since the 150a is mounted and fixed, the hydraulic cylinders 17 and 17 as pressure contact mechanisms are interposed between the bearing members 12 and 12 of the cutter roll 20 and the corresponding frames 15a. .

1 diaper (absorbent article), 1a semi-finished product (work), 1h leg opening,
10 Cutter device, 10a Cutter device,
12 Bearing member, 13 Bearing member, 14 Bearing member,
15 housing member, 15a frame, 15b floor,
17 Hydraulic cylinder,
20 cutter roll, 20s outer peripheral surface, 21 cutter blade,
22 roll body part, 23 small diameter part,
25 bearer part (annular convex part), 25s peripheral surface,
40 anvil roll, 40 s outer peripheral surface, 40 sr, part to be a receiving blade,
42 Roll body part, 43 Small diameter part,
50 backup roll, 50s outer peripheral surface,
52 Roll body part, 53 Small diameter part,
55 bearer part (contact part, second annular convex part), 55s peripheral surface (contact part),
55f part,
60 drive mechanism, 61 shaft coupling, 63 drive transmission gear,
101 transport roller,
110 cutter device, 110a cutter device, 110b cutter device,
150 backup roll, 150a roll, 150as outer peripheral surface,
Gr roll gap, A21 cutter blade partition area, A40 range,
C20 rotation axis, C40 rotation axis, C50 rotation axis,
P20 center part, P25 center position, P40 center part, P55 center position,

Claims (4)

A cutter device for cutting a workpiece of an absorbent article conveyed in a conveyance direction,
A cutter roll that rotates around a rotation axis along a direction intersecting the transport direction and is provided with a cutter blade protruding from the outer peripheral surface;
An anvil roll that rotates in conjunction with the cutter roll and receives the cutter blade by an outer peripheral surface disposed opposite to the outer peripheral surface of the cutter roll;
A backup roll that suppresses bending deformation of the anvil roll by pressing the anvil roll by contacting the outer peripheral surface of the anvil roll at a predetermined contact portion;
An annular convex portion that protrudes from the outer peripheral surface and contacts the outer peripheral surface of the anvil roll at a position closer to the end side in the direction along the rotation axis than the position of the cutter blade in the outer peripheral surface of the cutter roll. Is provided,
The contact portion of the backup roll is located at both ends in the direction along the rotation axis, and is located on the center side of the annular convex portion in the direction along the rotation axis. Absorbent article workpiece cutter device. It is a cutter device of the work of an absorptive article according to claim 1,
A part of the contact portion of the backup roll does not overlap with the annular convex portion in the direction along the rotation axis. It is a cutter device of the work of an absorptive article according to claim 1 or 2,
The workpiece cutter apparatus for absorbent articles, wherein the contact portion of the backup roll is in contact with a portion of the outer peripheral surface of the anvil roll that does not face the cutter blade. It is the cutter apparatus of the workpiece | work of the absorbent article in any one of Claims 1 thru | or 3,
The backup roll has a second annular convex portion protruding from the outer peripheral surface thereof as the contact portion at both ends in the direction along the rotation axis, respectively.
Regarding the direction along the rotation axis, each of the second annular convex portions is disposed between the position of the cutter blade of the cutter roll and the position of the annular convex portion of the cutter roll. A workpiece cutter device for absorbent articles.

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