JP5942819B2 - Cutting device and method for manufacturing disposable diaper - Google Patents

Description

  The present invention relates to a cutting apparatus capable of cutting a workpiece by a cutter roll having a cutting blade and an anvil roll facing the cutter roll. More specifically, the cutting device according to the present invention prevents the cutter roll rotating shaft from escaping and the cutting blade hitting non-uniformly when the cutting blade of the cutter roll contacts the flat surface of the anvil roll. Means to do. The present invention also relates to a method of manufacturing a disposable diaper by cutting a sheet member or an elastic elastic member using the cutting device.

  Conventionally, a rotary cutter is known in which a workpiece is introduced between a cutter roll having a cutting blade and an anvil roll having a flat outer peripheral surface, and the workpiece is cut into a desired shape. Such a cutting device is provided so that the rotating shaft of the cutter roll and the rotating shaft of the anvil roll are parallel to each other. The cutter roll is provided with a cutting blade protruding radially from the outer peripheral surface thereof, and the cutter roll and the anvil roll rotate with the cutting edge of the cutting blade being in pressure contact with the outer peripheral surface of the anvil roll. When the workpiece is supplied between the cutter roll and the anvil roll, the workpiece is sandwiched between the cutting blade of the cutter roll and the outer peripheral surface of the anvil roll and cut.

  Such a cutting device is conventionally known to be used for, for example, cutting a sheet member (nonwoven fabric, etc.) or an elastic elastic member constituting a disposable diaper (Patent Document 1, Patent Document 2, etc.).

  Patent Document 1 discloses an invention relating to a cutter roll having a cutting blade formed on an outer peripheral surface so as to be continuous in a mountain range. The cutter roll of patent document 1 has a sleeve-shaped roll main body and a shaft member that penetrates the inside of the inner diameter. The roll body and the shaft member are configured such that a ring member having a tapered surface is interposed between the roll body and the shaft member. Thereby, it is supposed that the cutter roll of patent document 1 can make a cutting blade contact with an anvil roll with a fixed surface pressure over the whole area.

  Further, Patent Document 2 discloses a cutting device that combines a cutter roll and an anvil roll and presses and cuts a predetermined portion of a laminated body inserted between both rolls. The cutting device of Patent Document 2 cuts a plurality of elastic elastic members fixed in a stretched state between nonwoven fabric laminates at a plurality of locations, respectively, sandwiched between these laminates. Yes. Thereby, the elastic member around the trunk sandwiched between the nonwoven fabrics is intermittently discontinuous, and the stretchability is not exhibited in the discontinuous region.

JP-A-6-63898 Japanese Patent Laid-Open No. 2004-254861

  By the way, as mentioned above, when cutting the sheet | seat member, elastic elastic member, etc. which comprise a disposable diaper with a rotary cutter, it is necessary to ensure the axial length of a cutter roll and an anvil roll comparatively long. However, in particular, when the length of the cutter roll in the axial direction is increased, there is a problem in that the rotation axis of the cutter roll is distorted when the cutter roll is rotated at a high speed.

  In addition, when the rotation axis of the cutter roll is distorted as described above, the contact when the cutting blade of the cutter roll contacts the flat surface of the anvil roll becomes non-uniform, and the sheet member or elastic elastic member to be cut There was a problem that the cut could not be cut and the cut occurred.

  Therefore, at present, there is a need for a cutting device that can prevent the cutter roll's rotating shaft from escaping and non-uniform cutting blade contact when the cutter roll's cutting blade contacts the flat surface of the anvil roll. It has been.

Therefore, the inventors of the present invention have intensively studied the means for solving the problems of the above-described conventional invention. As a result, the cutting device provided with the cutter roll and the anvil roll is further pressed against the cutter roll or the anvil roll. It was found that by providing reinforcing means to suppress axial blurring, the distortion generated on the rotating shaft of the cutter roll can be eliminated, and as a result, the problem of unsatisfied workpieces can be efficiently eliminated. Based on the above knowledge, the present inventor has conceived that the problems of the prior art can be solved, and has completed the present invention.
More specifically, the present invention has the following configuration.

The first aspect of the present invention relates to a cutting device.
The cutting device of the present invention includes a cutter roll 10 having one or a plurality of cutting blades 11 on an outer peripheral surface, and an anvil roll 20 disposed to face the cutter roll 10. The workpiece introduced in between is cut by the cutting blade 11.
The cutting device of the present invention further includes one or a plurality of reinforcing means 30.
The reinforcing means 30 has one or a plurality of presser rolls 31 and an urging portion 32.
The presser roll 31 contacts the outer peripheral surface of the cutter roll 10.
Further, the urging unit 32 urges the presser roll 31 so that the cutter roll 10 is pressed toward the direction in which the anvil roll 20 exists through the presser roll 31.

  As described above, the cutting device of the present invention can maintain the state in which the cutter roll 10 is pressed against the anvil roll 20 by pressing the cutter roll 10 with the reinforcing means 30. In this way, by pressing the cutter roll 10 with the reinforcing means 30, even when the cutter roll 10 rotates at a high speed, it is possible to solve the problem that the rotation axis is distorted. Moreover, since the cutting blade 11 of the cutter roll 10 comes into contact with the flat surface of the anvil roll uniformly by pressing the cutter roll 10 with the reinforcing means 30, it is possible to prevent the workpiece from being cut.

In the cutting apparatus of the present invention, the plurality of cutting blades 11 have at least a first cutting region 11a and a second cutting region 11b, and the first cutting region 11a and the second cutting region 11b are It is preferable that the cutter roll 10 is formed apart in the axial direction.
In this case, at least one of the one or a plurality of presser rolls 31 is in contact with the outer peripheral surface of the cutter roll 10 in a region between the first cutting region 11a and the second cutting region 11b. It is preferable that

  As described above, in a preferred embodiment of the present invention, the cutting blade 11 is formed on the outer peripheral surface of the cutter roll 10 in two regions (a first cutting region 11a and a second cutting region 11b). The reinforcing means 30 presser roll 31 is positioned between the two regions of the cutting blade 11. By doing so, the reinforcing means 30 presses the cutter roll 10 between the two regions of the cutting blade 11. That is, when the axial length of the cutter roll 10 is increased, distortion at the central portion in the axial direction increases particularly when the cutter roll 10 rotates at a high speed. Thus, the shaft roll of the cutter roll 10 can be effectively eliminated by pressing the press roll 31 of the reinforcing means 30 near the central portion where the distortion of the rotation axis is particularly large.

In the cutting device of the present invention, it is preferable that the plurality of cutting blades 11 further include a third cutting region 11c between the first cutting region 11a and the second cutting region 11b.
In this case, it is preferable that at least one of the plurality of presser rolls 31 abuts on the outer peripheral surface of the cutter roll 10 in a region between the first cutting region 11a and the third cutting region 11c. .
Moreover, it is preferable that at least any one of the plurality of presser rolls 31 abuts on the outer peripheral surface of the cutter roll 10 in a region between the second cutting region 11b and the third cutting region 11c.

  As in the above configuration, the cutting regions of the plurality of cutting blades 11 are formed on the outer peripheral surface of the cutter roll 10 in three parts, and the presser roll 31 is brought into contact with each of these three cutting regions. Thus, the rotation axis of the cutter roll 10 is further stabilized. Therefore, since the cutting blade 11 of the cutter roll 10 comes into contact with the flat surface of the anvil roll more uniformly, it is possible to reliably prevent the workpiece from being cut.

In the cutting device of the present invention, each of the reinforcing means 30 preferably has a front-stage presser roll 31 a and a rear-stage presser roll 31 b as the presser roll 31.
In this case, it is preferable that the reinforcing means 30 press the cutter roll 10 in the direction in which the anvil roll 20 exists by the front-stage presser roll 31a and the rear-stage presser roll 31b.

  Thus, in the preferable form of this invention, each of the reinforcement means 30 is provided with the two presser rolls 31a and 31b, and these two presser rolls 31a and 31b contact | abut to the cutter roll 10 simultaneously. In this way, the rotation of the cutter roll 10 is further stabilized by pressing the cutter roll 10 with the two presser rolls 31a and 31b, rather than pressing the cutter roll 10 with the single presser roll 31.

The cutting device of the present invention may hold the anvil roll 20 by the presser roll 31.
That is, the reinforcing means 30 is configured so that the anvil roll 20 is pressed toward the direction in which the cutter roll 10 exists through the one or more press rolls 31 that are in contact with the outer peripheral surface of the anvil roll 20 and the press roll 31. And an urging portion 32 that urges the presser roll 31.

  Even when the anvil roll 20 is pressed by the reinforcing means 30 as in the above configuration, the cutting blade 11 of the cutter roll 10 comes into contact with the flat surface of the anvil roll uniformly, so that the workpiece can be prevented from being cut.

The 2nd side surface of this invention is related with the manufacturing method of a disposable diaper.
The manufacturing method of this invention includes the process of cut | disconnecting the sheet | seat member used for a disposable diaper, or an elastic expansion-contraction member with the cutting device which concerns on the 1st side surface of this invention.

  As described above, by using the cutting device according to the first aspect of the present invention, the sheet member and the elastic elastic member used in the disposable diaper are cut, so that there is no cut and the cut surface is beautiful. You can get a disposable diaper.

  According to the cutting device of the present invention, when the cutting blade of the cutter roll comes into contact with the flat surface of the anvil roll, it is possible to prevent a situation in which the rotating shaft of the cutter roll escapes and the contact of the cutting blade becomes uneven.

  According to the method for manufacturing a disposable diaper according to the present invention, it is possible to obtain a disposable diaper which is not cut and has a beautiful cut surface.

FIG. 1 is a perspective view showing an example of the appearance of a cutting device according to the present invention. 2 is a cross-sectional view showing a state cut along line AA in FIG. FIG. 3 is a side view of the cutting device shown in FIG. FIG. 4 conceptually shows some steps of the method for manufacturing a disposable diaper according to the present invention. FIG. 5 is a developed view showing an example of a disposable diaper manufactured by the manufacturing method according to the present invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.
In the present specification, the “axial direction” of a cutter roll or an anvil roll means the direction (the left-right direction in FIG. 2) in which the rotation axis of these rolls extends. The “circumferential direction” of the cutter roll or anvil roll means the rotational direction or reverse rotational direction of these rolls.
In the present specification, “A to B” means A or more and B or less.

(1. Cutting device)
FIG. 1 is a perspective view showing an outline of a cutting apparatus according to the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a side view of the cutting device shown in FIG.
As shown in FIGS. 1 to 3, the cutting device 100 of the present invention is basically constituted by a cutter roll 10, an anvil roll 20, and reinforcing means 30. As shown in FIG. 1, the cutter roll 10 and the anvil roll 20 are provided to face each other so that the axial center O1 of the cutter roll 10 and the axial center O2 of the anvil roll 20 are parallel to each other. Moreover, in this embodiment, the reinforcement means 30 is arrange | positioned above the cutter roll 10, and is pressing the cutter roll 10 toward the direction where the anvil roll 20 located in the downward direction exists.

  First, the cutter roll 10 has a rotating shaft 12 and an outer peripheral surface 13 formed with a predetermined radius from the axis center O1 of the rotating shaft 12. Further, the cutter roll 10 is provided with a plurality of cutting blades 11 protruding on the outer peripheral surface 13 in the radial direction. Further, on both sides of the cutter roll 10 in the axial direction, cylindrical contact rings 14 having a slightly larger radius than the outer peripheral surface 13 are formed. The heights of the cutting blade 11 and the contact ring 14 are adjusted so that the cutting edge of the cutting blade 11 protrudes somewhat from the contact ring 14.

  On the other hand, the anvil roll 20 has a rotating shaft 21 and an outer peripheral surface 22 formed with a predetermined radius from the axial center O2 of the rotating shaft 21. The outer peripheral surface 22 of the anvil roll 20 is a flat surface. The contact ring 14 of the cutter roll 10 and the cutting edge of the cutting blade 11 are in contact with the outer peripheral surface 22 of the anvil roll 20.

  The cutter roll 10 and the anvil roll 20 are pressurized with each other, and the contact ring 14 of the cutter roll 10 contacts the outer peripheral surface 22 of the anvil roll 20 with a predetermined pressure. Thereby, the space | interval between the axial center O1 of the cutter roll 10 and the axial center O2 of the anvil roll 20 is maintained constant. In addition, the cutting blade 11 provided on the cutter roll 10 and the outer peripheral surface 22 of the anvil roll 20 are pressed against each other with a predetermined pressure in a state where the distance between the axial centers O1 and O2 of both rolls is kept constant.

  The cutter roll 10 and the anvil roll 20 described above are rotationally driven by a drive mechanism (not shown) so that their rotational speeds are synchronized with each other. When a work (not shown) is fed between the rotating cutter roll 10 and the anvil roll 20, the work is sandwiched by the cutting edge of the cutting blade 11 of the cutter roll 10 and the outer peripheral surface 22 of the anvil roll 20. Depending on the shape of the workpiece, the workpiece is cut.

  As the configurations of the cutter roll 10 and the anvil roll 20, well-known configurations can be appropriately adopted in addition to the above-described configurations. For example, the cutting blade 11 of the cutter roll 10 or the outer peripheral surface 22 of the anvil roll 20 may be heated by a known heating means. Thereby, it is possible to perform cutting while applying heat to the workpiece to be cut. For this reason, for example, when the workpiece is a non-woven fabric formed of a thermoplastic resin, the workpiece can be efficiently and continuously cut. Further, wear of the cutting blade 11 of the cutter roll 10 can be prevented.

  Moreover, what is necessary is just to employ | adopt a well-known thing suitably also about the shape of the cutting blade 11 with which the cutter roll 10 is equipped. In the form shown in FIG. 1, a plurality of fine blades are arranged in a line to form a cutting blade, and the group of thin blades arranged in a straight line is at a predetermined angle with respect to the rotation axis of the cutter roll, It is arranged at an angle. However, the cutting blade may be linearly formed parallel to the axial direction of the cutter roll, or may be continuously curved in an S shape and extend in the axial direction.

  Moreover, as FIG. 1 shows, the some cutting blade 11 of the cutter roll 10 is divided and formed in the 1st cutting area | region 11a and the 2nd cutting area | region 11b at least. In this embodiment, the 1st cutting area | region 11a and the 2nd cutting area | region 11b are arrange | positioned at the both sides of the axial direction of the cutter roll 10, and are spaced apart and provided by predetermined spacing. Here, the cutting area means an area in the circumferential direction of the cutter roll 10 where the workpiece can be cut by the cutting blade 11. That is, in the present specification, the cutting area is defined as an area covering the entire circumferential direction of the cutter roll 10 including a portion where the cutting blade 11 is formed. The cutting region may be formed by one cutting blade 11 or may be formed by a plurality of cutting blades 11 forming a group. In the embodiment shown in FIG. 1, the first cutting region 11 a and the second cutting region 11 b are formed by a group of a plurality of cutting blades 11.

  In the present embodiment, the plurality of cutting blades 11 of the cutter roll 10 further include a third cutting region 11c between the first cutting region 11a and the second cutting region 11b. The third cutting region 11 c is formed at a position including the center in the axial direction of the outer peripheral surface 13 of the cutter roll 10. The third cutting area 11c is provided at a predetermined interval from each of the first cutting area 11a and the second cutting area 11b.

As shown in FIGS. 1 to 3, the cutting device 100 according to the present embodiment further includes reinforcing means 30 for pressing the cutter roll 10 in the direction in which the anvil roll 20 exists. The reinforcing means 30 is disposed above the cutter roll 10 by the gantry 50 and presses the cutter roll 10 downward in the direction of gravity. In the present embodiment, a plurality of reinforcing means 30 are provided at positions where the reinforcing means 30 abuts on the outer peripheral surface 13 of the cutter roll 10 in the area between the first cutting area 11 a and the second cutting area 11 b of the cutter roll 10. ing. More specifically, in the present embodiment, one reinforcing means 30 is disposed in a region between the first cutting region 11a and the third cutting region 11c of the cutter roll 10, and the second cutting region. One unit is arranged in a region between 11b and the third cutting region 11c.
Each of the reinforcing means 30 basically includes a plurality of presser rolls 31 and an urging portion 32.

  The presser roll 31 is a rotating member that directly contacts the outer peripheral surface 13 of the cutter roll 10. The presser roll 31 rotates freely according to the rotation of the cutter roll 10. As shown in the side view of FIG. 3, each reinforcing means 30 includes two presser rolls 31. That is, the plurality of presser rolls 31 include a front presser roll 31a and a rear presser roll 31b. The front presser roll 31a and the rear presser roll 31b are arranged so that the axial center of the front presser roll 31a and the axial center of the rear presser roll 31b are parallel to the axial center of the cutter roll 10 and the axial center of the anvil roll 20, respectively. Is provided. These front-stage presser roll 31 a and rear-stage presser roll 31 b are simultaneously in contact with the outer peripheral surface 13 of the cutter roll 10, and are in contact with the outer peripheral surface 13 in the same region in the circumferential direction of the cutter roll 10. In other words, the positions of the front-stage presser roll 31a and the rear-stage presser roll 31b are the same in the axial direction of the cutter roll 10 (see FIG. 2). In this way, each reinforcing means 30 presses the cutter roll 10 toward the direction in which the anvil roll 20 exists at the two points of the front presser roll 31a and the rear presser roll 31b.

  Further, as shown in FIGS. 1 to 3, the urging unit 32 has a structure for urging each presser roll 31. As shown in detail in the cross-sectional view of FIG. 2, in this embodiment, each of the urging portions 32 includes a bracket 41 that rotatably holds a plurality of presser rolls 31, and the bracket 41 slides up and down. As described above, the slide plate 42 that holds the left and right sides of the bracket 41 and the auxiliary top plate 43 that fixes the slide plate 41 to the mount 50 are provided. Further, the urging portion 32 has a hydraulic cylinder 44 above the auxiliary top plate 43. The hydraulic cylinder 44 has a cylinder main body 44a and a piston rod 44b built in the cylinder main body 44a. The piston rod 44 b of the hydraulic cylinder 44 is connected to the upper portion of the bracket 41 through the opening formed in the auxiliary top plate 43 and between the left and right slide plates 42. The cylinder main body 44a of the hydraulic cylinder 44 is filled with fluid and drives the piston rod 44b up and down in accordance with the hydraulic pressure supplied from the outside. Further, a floating joint 45 may be provided at a connecting portion between the piston rod 44b and the bracket 41. The floating joint 45 connects the tip of the piston rod 44b to the bracket 41 so as to be movable within a predetermined range, and absorbs misalignment of the piston rod 44b and the bracket 41 and insufficient accuracy of parallelism. In addition, a hydraulic manifold 46 is disposed on the top of the gantry 50. A fluid supplied from a power source (not shown) arranged outside is introduced into a conduit 47 through a hydraulic manifold 46 and sent to each hydraulic cylinder 44 constituting each of the urging units 32.

  As described above, in the present embodiment, the urging unit 32 mainly includes the hydraulic cylinder 44 and can urge each presser roll 31. That is, when the hydraulic cylinder 44 is driven and the piston rod 44 b is lowered, the bracket 41 connected to the tip of the piston rod 44 b is lowered downward while sliding the slide plate 42. Thereby, each presser roll 31 (the front-stage presser roll 31a and the rear-stage presser roll 31b) held by the bracket 41 presses the outer peripheral surface 13 of the cutter roll 10 with a predetermined pressure.

  In this way, the shaft roll of the cutter roll 10 can be prevented by pressing the outer peripheral surface 13 of the cutter roll 10 with the presser roll 31 provided in the reinforcing means 30. The hydraulic pressure in the hydraulic cylinder 44 may be set to such an extent that the shaft roll of the cutter roll 10 can be prevented and the presser roll 31 can be prevented from being worn or damaged. For example, the hydraulic pressure in the hydraulic cylinder 44 may be adjustable in the range of 0.5 MPa to 20 MPa, 1 MPa to 15 MPa, or 5 MPa to 10 MPa.

  In addition, in the cross-sectional view of FIG. 2, the region where the presser roll 31 of the reinforcing means 30 contacts the outer peripheral surface 13 of the cutter roll 10 is shown with light ink. The width W (the length of the cutter roll 10 in the axial direction) where the presser roll 31 abuts may be 15 mm to 100 mm, 20 mm to 85 mm, 25 mm to 70 mm, or 30 mm to 50 mm. The wider the width W of the region where the presser roll 31 abuts, the more stable the cutter roll 10 rotates. In order to increase the width W of the area where the presser roll 31 contacts, the width of the presser roll 31 itself may be increased, or a plurality of presser rolls 31 may be arranged in the axial direction of the cutter roll 10. Good. For example, it is preferable that the plurality of presser rolls 31 are held in parallel by the bracket 41 and the width W of the region in contact with the cutter roll 10 is increased. In this case, it is more preferable that the two press rolls 31 are held side by side by the bracket 41 and the width W of the region in contact with the cutter roll 10 is 70 mm or more.

  As shown in FIGS. 1 and 2, in a preferred embodiment of the present invention, the cutting blade 11 of the cutter roll 10 includes a first cutting area 11a, a second cutting area 11b, and a third cutting area. 11c, and each area is provided with a predetermined interval. The reinforcing means 30 is provided at two places. In such a case, one reinforcing means 30 has its pressing roll 31 in contact with the outer peripheral surface 13 of the cutter roll 10 in the area between the first cutting area 11a and the third cutting area 11c. . The other reinforcing means 30 has its presser roll 31 in contact with the outer peripheral surface 13 of the cutter roll 10 in a region between the second cutting region 11b and the third cutting region 11c. In this way, by arranging the two reinforcing means 30, the central portion of the cutter roll 10 that is particularly susceptible to axial blurring can be pressed by the two reinforcing means 30, so that the cutter roll 10 is rotated at a high speed. Even in this case, distortion can be prevented from occurring on the rotating shaft of the cutter roll. Further, by eliminating the distortion of the cutter roll 10, the contact when the cutting blade 11 of the cutter roll 10 contacts the outer peripheral surface 22 of the anvil roll 20 becomes uniform, so that the workpiece is not cut. Can solve the problem.

  The cutting device 100 according to the above embodiment has a configuration in which the cutter roll 10 is pressed by the reinforcing means 30. However, in another embodiment of the present invention, the anvil roll 20 is pressed by the reinforcing means 30. It is also possible to make it. That is, in another embodiment of the present invention, the reinforcing means 30 includes one or a plurality of presser rolls 31 that are in contact with the outer peripheral surface of the anvil roll 20, and the anvil roll 20 exists in the cutter roll 10 via the presser roll 31. And a biasing portion 32 that biases the presser roll 31 so as to be pressed in the direction. When the cutting device 100 is an embodiment in which the anvil roll 20 is pressed by the reinforcing means 30, the “cutter roll 10” in the above embodiment may be replaced with the “anvil roll 20”. Omit.

(2. Manufacturing method of disposable diapers)
Next, the manufacturing method of the disposable diaper using the said cutting device 100 is demonstrated.
FIG. 4 is a perspective view schematically showing a part of the manufacturing method of the disposable diaper. In particular, in FIG. 4, the process in which the cutting device 100 is used is drawn mainly in the manufacturing process of the disposable diaper. In the manufacturing process shown in FIG. 4, an outer package of a disposable diaper is manufactured. The exterior body of the disposable diaper is a member for holding an absorbent main body that absorbs liquid such as urine in the crotch of the wearer. The exterior body forms a gather by fixing a plurality of elastic elastic members in a stretched state between a plurality of sheet members. Here, the cutting device 100 described above is used in a process of cutting an elastic stretchable member joined between sheet members constituting the exterior body at a portion where the exterior body and the absorbent main body overlap.

  First, a long outer sheet (112, 122) having a predetermined width is unwound from an original roll (not shown) and is conveyed downstream in the conveying direction. The outer sheets (112, 122) are conveyed to the adhesive application unit 210. In the adhesive application unit 210, an adhesive is applied to one side of the outer sheet (112, 122) (the side on which the inner sheet is pasted later). Here, reference numeral 151a indicates an adhesive portion to which the waist elastic member 151 is bonded later, and reference numeral 152a indicates an adhesive portion to which the abdominal elastic member 152 is bonded later. The waist elastic member adhesion portion 151a and the waist elastic member adhesion portion 152a are provided on both sides in the width direction of the outer sheets (112, 122), respectively. As shown in FIG. 4, the waist elastic member 151a is continuously provided along the transport direction. On the other hand, the abdominal circumference elastic member adhesion part 152a is provided intermittently along the conveyance direction. For this reason, the space between the two adjacent belly stretchable member bonding portions 152a is a non-bonded portion.

  FIG. 4 shows a method of applying an adhesive for bonding the elastic elastic member to the outer sheets (112, 122). However, the adhesive may be directly applied to the elastic elastic member by, for example, a known slit coat coating method or a sure wrap coating method.

  As shown in FIG. 4, an expansion / contraction member attachment portion 220 is disposed on the downstream side of the adhesive application portion 210. In the expansion / contraction member mounting portion 220, a rotatable cylindrical expansion / contraction member guide roll is disposed so that the rotation axis thereof is orthogonal to the conveying direction of the outer sheets (112, 122). The elastic member guide roll presses the waist elastic member 151 and the abdominal elastic member 52 fed from a supply source (not shown) to the waist elastic member adhesion part 151a and the abdominal elastic member adhesion part 152a. 4 shows an example in which the waist elastic member 151 and the waist elastic member 152 are simultaneously attached to the outer sheet (112, 122) by the elastic member attaching portion 220, but the waist elastic member 151 and the waist elastic member The member 152 may be attached to the outer sheet (112, 122) at another stage.

  As shown in FIG. 4, a coating material mounting portion 230 is disposed on the downstream side of the elastic member mounting portion 220. In the covering material attaching portion 230, a rotatable turning roll is arranged, and an inner sheet (111, 121) fed out from a raw roll (not shown) is guided by the turning roll and an outer sheet (112, 122). The various elastic members 151 and 152 attached on the top are covered. Moreover, the smooth roll which can be rotated so as to oppose a turning roll is arrange | positioned at the elastic member non-adhesion surface side of an outer sheet | seat (112,122). For this reason, the various elastic members 151 and 152 are stuck between the outer sheet (112, 122) and the inner sheet (111, 121) by pressing with the turning roll and the smooth roll.

  As shown in FIG. 4, a stretchable member cutting portion 240 is disposed on the downstream side of the covering material attaching portion 230. In the stretchable member cutting unit 240, the above-described cutting device 100 is used. As described above, the cutting device 100 includes the cutter roll 10 and the anvil roll 20 that are disposed to face each other. Further, above the cutter roll 10, a presser roll 31 as a reinforcing means for pressing the cutter roll 10 in the direction in which the anvil roll 20 exists is provided. The cutter roll 10 has one or a plurality of cutting blades 11 on its outer peripheral surface 13, and the outer peripheral surface 22 of the anvil roll 20 is a smooth surface. In the present embodiment, the cutting blade 11 of the cutter roll 10 is provided at a position where a plurality of belly stretchable members 152 can be cut. Between the cutter roll 10 and the anvil roll 20, a stretchable sheet in which various stretchable members 151, 152 are sandwiched between an outer sheet (112, 122) and an inner sheet (111, 121) is supplied. The cutter roll 10 is pressed to the anvil roll 20 side by the presser roll 31 of the reinforcing means, and an abdominal circumference elastic member 152 is added between the cutting blade 11 of the cutter roll 10 and the anvil roll 20. Cut by pressure. That is, the conveyance of the outer sheet (112, 122) and the outer sheet (111, 121) bonded together, and the rotation of both rolls 10, 20 are performed simultaneously with the cutting blade 11 of the cutter roll 10 facing the anvil roll 20. , The non-adhesive portion of the abdominal circumference elastic member bonding portion 152a that joins the abdominal circumference elastic member 152 is synchronized so as to be positioned between the cutting blade 11 and the anvil roll 20. As a result, due to the pressing of the cutting blade 11 and the anvil roll 20, the plurality of abdominal circumference elastic members 152 are cut at the non-bonded portion.

  The exterior sheet from which the belly stretchable member 152 is cut is further processed in a process subsequent to the cutting of the stretchable member. Although illustration is omitted, for example, the continuous exterior sheet is divided into two by a known cutting means at the center in the width direction along the conveyance direction, and the exterior body 110 on the front body side and the exterior body on the back body side are separated. It becomes the body 120. Thereafter, the absorbent main body 130 manufactured in a separate process by a known means is fixed to the skin contact surface side of the front body exterior body 110 and the back body exterior body 120. Thereafter, a member including the front body exterior body 110, the back body exterior body 120, and the absorbent main body 130 is cut in a direction orthogonal to the transport direction so as to be an individual disposable diaper, so-called pants-type disposable. Can produce diapers.

  For example, FIG. 5 shows a developed view of a disposable diaper 200 manufactured according to the above method. FIG. 5 shows a state in which the pants-type disposable diaper 200 is viewed from the surface (skin facing surface) side facing the wearer's skin.

  As shown in FIG. 5, the disposable diaper 200 includes a front body exterior body 110, a back body exterior body 120, and an absorbent main body 130. The front body exterior body 1 is located on the front body side that contacts the wearer's abdomen when worn, and the rear body exterior body 120 is located on the back body side that contacts the back of the wearer when worn. The absorbent main body 130 has one end side in the longitudinal direction fixed to the front body exterior body 110 and the other end side fixed between the back body exterior body 120. For this reason, in the disposable diaper manufactured by the said embodiment, the absorptive main body 130 will be in the state bridge | crosslinked between the front body exterior body 110 and the back body exterior body 120. FIG. As means for fixing the absorbent main body 130 to the front body exterior body 110 and the back body exterior body 120, known means can be used.

  The front body exterior body 110 and the back body exterior body 120 are basically configured by overlapping inner sheets 111 and 121 and outer sheets 112 and 122. Between the inner sheets 111 and 121 and the outer sheets 112 and 122, a plurality of waist elastic members 151 and a plurality of belly elastic members 152 are fixed in an extended state along the width direction of the disposable diaper. Yes.

  As shown in FIG. 5, some of the plurality of belly stretchable materials 152 are disposed so as to overlap the absorbent main body 130. Further, among the plurality of belly stretchable materials 152, the one that overlaps with the absorbent body 131 of the absorbent main body 130 is partially discontinuously formed in the center in the width direction of the front body exterior body 110 and the back body exterior body 120. Has been.

  As described above, when the above-described cutting device 100 of the present invention is used, a plurality of belly stretchable materials 152 provided in the front body exterior body 110 and the back body exterior body 120 are arranged in a region overlapping the absorbent main body 130. The disposable diaper which became part discontinuous can be manufactured. A situation in which wrinkles are formed in the absorbent main body 130 due to the contraction force of the abdominal stretchable material 152 by discontinuating the plurality of abdominal stretchable materials 152 in a region overlapping with the absorbent main body 130 Can be prevented.

In the above embodiment, the manufacturing method of the so-called pants-type disposable diaper has been described as an example. However, the manufacturing method using the cutting device of the present invention is also used as a manufacturing method of a so-called tape-type disposable diaper. it can. Moreover, in the said embodiment, although the process which cut | disconnects the elastic elastic member joined between several sheet | seat members was demonstrated as an example using the cutting device of this invention, the cutting device of this invention was demonstrated. For example, it can be used in a process of cutting the sheet member and molding the sheet member into a desired shape.
That is, the contents of the invention described in the present specification are merely representations of preferred embodiments of the present invention, and the present invention is not limited to the above-described embodiments, and the matters described in the present specification. Based on the above, modifications and improvements obvious to those skilled in the art are included.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a method for manufacturing a disposable diaper for infants and the elderly and a cutting device used therefor. Therefore, the present invention can be suitably used, for example, in industries related to childcare and nursing care.

DESCRIPTION OF SYMBOLS 10 ... Cutter roll 11 ... Cutting blade 11a ... 1st cutting area | region 11b ... 2nd cutting area | region 11c ... 3rd cutting area | region 12 ... Rotating shaft 13 ... Outer peripheral surface 14 ... Contact ring 20 ... Anvil roll 21 ... Rotating shaft 22 ... outer peripheral surface 30 ... reinforcing means 31 ... presser roll 31a ... front presser roll 31b ... rear presser roll 32 ... urging unit 41 ... bracket 42 ... slide plate 43 ... auxiliary top plate 44 ... hydraulic cylinder 44a ... cylinder body 4b ... piston Rod 45 ... Floating joint 46 ... Hydraulic manifold 47 ... Conduit 50 ... Base

Claims (4)

A cutter roll (10) having one or more cutting blades (11) on the outer peripheral surface;
An anvil roll (20) disposed opposite to the cutter roll (10),
A cutting device for cutting a workpiece introduced between the cutter roll (10) and the anvil roll (20) with the cutting blade (11),
And further comprising one or more reinforcing means (30),
The reinforcing means (30)
One or a plurality of presser rolls (31) contacting the outer peripheral surface of the cutter roll (10);
A biasing portion (32) for biasing the presser roll (31) so that the cutter roll (10) is pressed toward the direction in which the anvil roll (20) exists via the presser roll (31). ) and are those having,
The plurality of cutting blades (11) have at least a first cutting region (11a) and a second cutting region (11b), and the first cutting region (11a) and the second cutting region. (11b) is formed apart in the axial direction of the cutter roll (10),
At least one of the one or the plurality of presser rolls (31) is the cutter roll (10) in the area between the first cutting area (11a) and the second cutting area (11b). The cutting device that comes into contact with the outer peripheral surface . The plurality of cutting blades (11) further include a third cutting region (11c) between the first cutting region (11a) and the second cutting region (11b),
Among the plurality of presser rolls (31), at least one of the presser rolls (31) is provided in the area between the first cutting area (11a) and the third cutting area (11c). Abut the outer surface,
Among the plurality of presser rolls (31), at least one of the presser rolls (31) is provided in the area between the second cutting area (11b) and the third cutting area (11c). Abuts the outer peripheral surface
The cutting device according to claim 1 . Each of the reinforcing means (30)
As the presser roll (31), there are a front presser roll (31a) and a rear presser roll (31b),
Wherein the front presser rolls and (31a) wherein a subsequent pressing roll (31b), according to the cutter roll (10) in claim 1 or claim 2, pressed toward the direction that is present in the anvil roll (20) Cutting device. Including a step of cutting a sheet member used for a disposable diaper or an elastic elastic member by the cutting device according to any one of claims 1 to 3 .
A manufacturing method for disposable diapers.

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