JP5173266B2 - Elastic member mounting method - Google Patents

Description

  The present invention relates to a method for attaching an elastic member.

In an absorbent article such as a disposable diaper, an elongated elastic member such as a rubber thread is bonded and fixed in a stretched state at an appropriate position to improve fit to the body. For example, in a tape-type paper diaper, a plurality of elongated elastic members are bonded and fixed between sheets on both sides in the width direction of an article so as to form a curved shape around the leg.
In this case, the portions between the elastic members in both sheets are vacant without being bonded to each other, which may lead to leakage. Therefore, the interval between the plurality of elastic members is narrowed at both ends in the longitudinal direction of the elastic members. Convergence and a method for attaching an elastic member therefor have been proposed (see Patent Document 1). More specifically, this attachment method includes a supply step of dividing a plurality of elastic members and supplying the elastic members toward a continuous web that is continuously supplied, and the elastic member supplied by the supply step. On the other hand, a swinging step of periodically swinging by a swinging mechanism with one or two webs to be a product as one cycle, and a stopper bar disposed adjacent to the swinging mechanism A stopping step of providing a stopping portion in which a plurality of elastic members are bundled and arranged in a straight line, and on the other hand, while supplying the top sheet or the back sheet, at least the elastic member of the top sheet or the back sheet should be bonded When applying the adhesive to the surface and joining the elastic member and the top sheet or back sheet with the adhesive, the elastic member is attached to the top sheet or back sheet. Is characterized in further comprising a pressing step of applying, the.
Japanese Patent No. 2999886

However, in this prior art, the elastic member can be converged, but the convergent portion is only a straight line along the MD direction (line flow direction), and cannot be in any other direction / shape. In particular, when manufacturing with the diaper front-rear direction as the MD direction as in the above prior art, the converging part is attached along the diaper front-rear direction, so that the stretchability of the converging part is used to improve the fit in the waist direction. Was impossible.
Further, in the above-described conventional technology, the convergence of the elastic member is governed by the mounting pattern, and the swing cannot be arbitrarily controlled.
Accordingly, a main problem of the present invention is to provide a method capable of arbitrarily changing the direction and shape of the convergent portion and the convergence rate when a plurality of elongated elastic members are converged and attached.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In the method of continuously supplying and attaching a plurality of elongated elastic members to the attachment position in the attached sheet while continuously conveying the attached sheet,
A swinging portion swinging in the CD direction is provided in the path of the plurality of elongated elastic members toward the mounting position,
The swinging portion is provided with a plurality of passages along the MD direction at intervals in the CD direction, and a guide body that moves in the CD direction with respect to the passage is provided near the downstream side of the passage in the swinging portion in the CD direction. Multiple in
The plurality of elongate elastic members are individually passed through the passages, and some of the elongate elastic members or all of the elongate elastic members are passed between the guide bodies, and then the attachment is performed. To the location,
While the plurality of elongated elastic members are swung by the swing of the swinging portion, the interval between the guide bodies is widened so that the plurality of elastic members passed between the guide bodies are moved in the CD direction of the passage. Attaching to the attached sheet at intervals according to the interval, and converging and attaching a plurality of elongated elastic members passed between the guides by narrowing the interval between the guides,
A method for attaching an elastic member.

(Function and effect)
In the present invention, by changing the distance between the guides, the elastic member can be swung while changing the degree of convergence of the elastic member. Therefore, the direction and shape of the convergent portion and the speed of convergence can be arbitrarily changed. For example, the converging portion can be attached in an arc shape. Of course, it is also possible to attach the converging portion linearly along the MD direction as in the above-described conventional technology. The CD direction means a lateral direction orthogonal to the MD direction.

<Invention of Claim 2>
While the swinging part is located in the middle part of the swinging range, keep the gap between the guides widened,
While the rocking part moves from the intermediate part to the first position before reaching the rocking end on one side in the CD direction, the interval between the guide bodies is narrowed toward the one side in the CD direction,
While the swinging part has reached the swinging end on the one side in the CD direction from the first position and then moved back to the other side in the CD direction and moved to the second position before reaching the intermediate part, Keep the distance between the guides narrow,
While the swinging portion moves from the second position to the intermediate portion, the interval between the guide bodies is increased toward the other side in the CD direction.
The attachment method of the elastic member of Claim 1.

(Function and effect)
By performing such control, while attaching a plurality of elongated elastic members in a wave shape, the elastic members are spaced apart at the end on one side of the wave oscillation direction, and converged at the other end. Between these, it can be set as the attachment pattern which a space | interval expands or narrows gradually. Such an attachment pattern is particularly suitable when a tape-type paper diaper described later is manufactured.

<Invention of Claim 3>
Four guide bodies are juxtaposed in the CD direction, between the adjacent first guide body and the second guide body, and between the adjacent third guide body and the fourth guide body, respectively. While passing a plurality of elastic members,
The interval between the first guide body and the second guide body and the position of the interval portion and the interval between the third guide body and the fourth guide body and the position of the interval portion are changed independently of each other.
The attachment method of the elastic member of Claim 1.

(Function and effect)
As described above, by increasing the number of guide bodies and independently controlling the positions and intervals of the guide bodies, a very complicated mounting pattern is possible.

  As described above, according to the present invention, when a plurality of elongated elastic members are converged and attached, advantages such as the direction and shape of the convergent portion and the convergence convergence can be arbitrarily changed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
(How to attach the elastic member)
FIG.1 and FIG.2 shows only the principal part of the manufacturing equipment of a tape-type paper diaper. That is, in this equipment, first, the continuous belt-like liquid-impervious backsheet 1 fed out from the roll is set as the upper side, and the continuous strip-shaped exterior sheet 12 fed out from the roll is set as the lower side, and both sheets 1 and 12 are paired with the first pair. The sheet 1 is guided between the nip rolls 20, and the continuous thread-like elastic member 13 is fed between the sheets 1 and 12 on the upstream side of the first nip roll 20, and the sheets 1 and 12 are bonded to each other, thereby forming a continuous belt-shaped outer surface side sheet. 15 is formed. Reference numeral 21 denotes a coating device for the adhesive. Subsequently, the continuous belt-like liquid-permeable top sheet 2 fed out from the roll is guided onto the central portion in the CD direction of the outer surface side sheet, and both the sheets 15 and 2 are guided between the pair of second nip rolls 22. An upstream side of the second nip roll 22, the individual absorbent body 3 is sequentially fed between the sheets 15 and 2 at a predetermined interval, and the peripheral edge of the top sheet 2 and the outer surface side sheet around the absorbent body 3. 15 is bonded. Reference numeral 23 indicates a device for applying the adhesive. Further, the base part of the continuous belt-like barrier sheet 4 supplied from the roll is supplied from both sides of the CD of the top sheet to the part on the outer surface side sheet 15, and after being fixedly bonded and fixed by the third nip roll 24, the cutter 25, the constricted portions along the circumference of the legs are cut off at a predetermined interval in the MD direction by 25, and are individually cut by the cutter 26 at a predetermined interval (at a predetermined position between the absorbers) in the MD direction. An individualized disposable diaper DP is formed. Reference numeral 27 indicates an adhesive application device for bonding the barrier sheet 4.

  Characteristically, as shown in FIG. 2, when the elastic member is fed, the elastic member 13 is swung in the CD direction. That is, the elastic member feeding path on the upstream side of the first nip roll 22 is provided with a swinging portion 30 that swings in the CD direction. On the swinging portion 30, a passage 31 along the MD direction is provided in the CD direction. At least the same number of elongated elastic members to be guided are provided at intervals in the direction, and a guide body 32 that moves in the CD direction with respect to the passage 31 is provided near the downstream side of the passage 31 in the swing portion 30 in the CD direction. Are installed side by side. The plurality of elongated elastic members 13 are individually passed through the passages 31 and then all of them are passed between the common guide bodies 32 and then guided to the mounting position. Although only one half of the CD direction is shown in FIG. 2, the swinging portions 30 of this embodiment are provided on both sides of the CD direction so as to be symmetrical with respect to the CD center line, and the swinging operation is also performed in the CD direction. It is symmetric about the center line.

  The swing part 30 can be swung (reciprocated) in the CD direction by a driving device such as a cylinder (not shown). A specific swing pattern can be determined as appropriate. For example, the swing sheet 30 is formed so as to form a wavy pattern in which the length of one product (one disposable diaper) is one cycle. In synchronization with the conveyance of the back sheet 1, it can be swung (repeatedly reciprocating) in the CD direction within a range of less than half the width of both sheets 12, 1. The moving speed of the oscillating unit 30 is preferably continuously changed, but may be changed discontinuously or may be constant.

  A plurality of guide bodies 32 provided on the swing part 30. Each of the members is a round bar-like or shaft-like member along the vertical direction, and the distance between the guide bodies 32 becomes narrower in synchronization with the swinging of the swinging part without the mutual movement range overlapping in the CD direction. It is configured to spread. The number of elastic members 13 passed between the guide bodies 32 is not particularly limited as long as it is plural. Therefore, some elastic members 13 are sent to the first nip roll 22 through the guide bodies 32, but the remaining elastic members 13 can also be sent directly to the first nip roll 22 without passing between the guide bodies 32. .

  The movement pattern of the guide body 32 can be determined as long as it is within a range in which the elastic member 13 can be converged and restored to a predetermined interval. In addition to changing the interval within the predetermined range, The position can also be changed. The moving speed of the guide body 32 is preferably continuously changed, but may be changed discontinuously or may be constant.

  Thus, by swinging the swinging portion 30 and changing the interval between the guide bodies 32 on the swinging portion 30 in a wide and narrow manner, the elastic member 13 swings and converges and is restored to a predetermined interval simultaneously. It can be carried out. 2 to 5 show an example of this. That is, as shown in FIG. 2, while the swinging portion 30 is positioned at the middle portion of the swinging range, the interval between the guide bodies 32 is maintained wide. Thus, the plurality of elastic members 13 passed between the guide bodies 32 are attached at a predetermined interval corresponding to the CD direction interval of the passage 31. In addition, the code | symbol C1 in a figure has shown the cutting scheduled position of a constricted part, and C2 has each shown the cutting planned position at the time of individualization.

  While the swinging part 30 moves from the intermediate part to the first position before reaching the swinging end on one side in the CD direction, as shown in FIG. To narrow. As a result, the plurality of elastic members 13 passed between the guide bodies 32 become narrower in mutual interval, and the convergence is completed at the first position.

FIG. 4 shows how the oscillating portion 30 moves from the first position to the oscillating end on one side in the CD direction and then moves back to the second position before turning back to the other side in the CD direction. As described above, the distance between the guide bodies 32 is kept narrow. Thereby, the plurality of elastic members 13 can be swung while being converged.
While the swinging portion 30 moves from the second position to the intermediate portion, as shown in FIG. 5, the interval between the guide bodies 32 is increased toward the other side in the CD direction. As a result, the plurality of elastic members 13 passed between the guide bodies 32 increase in mutual interval, and when reaching the intermediate portion, become a predetermined interval corresponding to the CD direction interval of the passage 31, and the predetermined interval Restoration to is completed.

  6 and 7 show other mounting pattern embodiments. In the present invention, since the position of the interval between the guide bodies 32 can be moved independently of the swinging, as shown in FIG. The position can be rocked to produce a smaller wavy change. Further, as shown in FIG. 7, four guide bodies 32 are arranged side by side in the CD direction, and between the adjacent first guide bodies 32 and the second guide bodies 32 and adjacent third guide bodies 32. A plurality of elastic members 13 are passed between the first guide body 32 and the fourth guide body 32, and the distance between the first and second guide bodies 32 and the position of the spacing portion, and the third and fourth guide bodies 32. The elastic member group 13 passed between the first and second guide bodies 32 and the third and fourth guides are changed by, for example, changing the interval and the position of the interval part independently as shown in the figure. While the distance between the elastic members 13 passed between the bodies 32 is changed widely, the distance between the elastic members 13 in each group 13 can be changed.

(About tape-type disposable diapers)
8 to 13 show an example of a tape-type disposable diaper. The disposable diaper includes an inner surface of a liquid-impervious backsheet 1 having an outer sheet 12 laminated on an outer surface, a liquid-permeable top sheet 2, and the like. The absorber 3 is interposed between the two.

  As the liquid-impermeable back sheet 1, in addition to a polyethylene film or the like, a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used. In order to improve the touch, a nonwoven fabric can be applied to the outer surface of the liquid-impermeable back sheet 1 to cover it.

  Various nonwoven fabrics can be used as the exterior sheet 12. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  As the liquid-permeable top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  As the absorbent body 3, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, and a mixture obtained by mixing and fixing a superabsorbent polymer as necessary. . If necessary, the absorbent body 3 can be wrapped with crepe paper (not shown). Moreover, the shape of the absorber 3 can be determined as appropriate, but in addition to the hourglass shape as illustrated, a shape that extends from the front side to the rear side of the crotch portion, such as a rectangle, is preferable.

  The liquid-impermeable back sheet 1 extends outward from the periphery of the absorber 3 and has a substantially hourglass shape. On the inner surface of the laterally extending portion of the liquid-impervious backsheet 1, a portion 4x on the outer side in the width direction of the barrier sheet 4 is attached over the entire front-rear direction, thereby forming a side flap portion SF where the absorber 3 does not exist. Yes. A portion 4c on the center side in the width direction of the barrier seat 4 extends to the top sheet 2, and an elongated elastic member 4G is stretched along the front-rear direction at the end on the center side in the width direction. It is fixed with a melt adhesive or the like. As the elongated elastic member 4G and the elongated elastic member 13 described later, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene formed in a thread shape, a string shape, a belt shape, or the like. Commonly used materials such as styrene butadiene, silicon, and polyester can be used.

  The liquid-permeable top sheet 2 has an hourglass shape that is slightly larger than the absorbent body 3, and a portion that extends slightly outward from the side edge of the absorbent body 3 is between the barrier sheet 4 and the liquid-impermeable back sheet 1. It is interposed and fixed to the liquid-impermeable backsheet 1 side by a hot melt adhesive or the like. This fixed portion is shown as a dot pattern in FIGS. As the material for the barrier sheet 4, a plastic sheet or a melt blown nonwoven fabric can be used. However, in terms of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.

  When the outer surface of the liquid-impermeable back sheet 1 is covered with a nonwoven fabric, the exterior nonwoven fabric is extended outward from the periphery of the absorber 3 in place of the liquid-impermeable back sheet 1 and the side portion of the barrier sheet 4 At the same time, the side flap portion SF in which the absorber 8 does not exist can be configured. In this case, the liquid-impermeable back sheet 1 can be formed in the same shape as the top sheet 2 without extending to the side flap portion SF.

  As shown in FIGS. 3 and 4, both barrier sheets 4, 4 are not attached to and detached from the inner surface of the article (the top sheet 2 surface and the back sheet 1 inner surface in the illustrated embodiment) in the widthwise outer portion 4 x throughout the entire front-rear direction. The portion 4c on the center side in the width direction is fixed so as not to be attached to and detached from the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment) at both ends in the front-rear direction, and between the both ends in the front-rear direction. It is not fixed to the inner surface (the top sheet 2 surface in the illustrated form). As shown in FIG. 4, this non-fixed portion is a portion that becomes a barrier portion that can stand up with respect to the inner surface of the article (the surface of the top sheet 2 in the illustrated embodiment). It is located at the boundary between the fixed portion 4x on the outer side in the direction and the inner portion 4c.

  At both ends of the disposable diaper in the front-rear direction, the liquid-impervious backsheet 1 and the liquid-permeable topsheet 2 are respectively extended from the front and rear ends of the absorbent body 3 to the front and rear sides, and the end flap portions EF without the absorbent body 3 exist. In the end flap portion EF on the back side, a plurality of yarn-like elastic members 7, 7... In the illustrated example are arranged along the width direction. As the thread-like elastic member 7, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester that are usually used can be used.

  In addition, the fastening tapes 5 and 5 are attached to the dorsal side flap portions SF so as to protrude sideways, and the front target tape 6 is attached to the abdominal side surface of the disposable diaper along the width direction. The disposable diaper is attached to the body by fastening the joining piece 8 a of the fastening tape 5 to the front target tape 6.

The fastening tape 5 of the illustrated example is attached by attaching the inner end side of one fastening base sheet 8 to the disposable diaper side, and extends from the outer edge to the tip side and protrudes sideways in two steps. The joining pieces 8a and 8a are formed, and the perforation 10 is provided from the outer edge toward the inside and along the horizontal direction with respect to the fastening base sheet 8 portion between the joining pieces 8a and 8a. However, the present invention is not limited to this, and a known fastening tape can be used. Although various sheet materials can be used as the fastening base sheet 8, it is preferable to use a single-layer or multi-layer nonwoven fabric having a basis weight of 40 to 80 g / m ² . The processing method is preferably spunbond having excellent strength characteristics. First hook tapes (male materials of mechanical fasteners) 9 and 9 having a large number of hook-like projections on the surface are attached to the inner surface side (liquid permeable surface sheet 2 side) of the joining pieces 8a and 8a, respectively. It can be joined to a front target tape (a female material of a mechanical fastener) 6 having a surface that is detachably hooked.

  Characteristically, a plurality of elongated elastic members 13 are provided on both sides in the width direction so as to extend from the abdominal part to the back part. The elastic member 13 can be attached by the above-described manufacturing method. In this embodiment, the elastic member 13 is fixed between the exterior sheet 12 and the back sheet 1 using an adhesive, but is provided only on the side flap portion SF. Depending on the mounting position, it can be provided between the back sheet 1 and the barrier sheet 4 or between the back sheet 1 and the top sheet 2.

  Particularly in the present embodiment, in the side flap portion SF, a plurality (five in the illustrated example) of outer elastic members 13 extending along the constricted portion formed so as to extend around the legs, the ventral side and the back side. A plurality of (three in the illustrated example) inner elastic members 13 having a start end and a terminal end in the side flap portion SF and extending inward to a portion overlapping the absorber in the crotch portion are provided. Yes.

  The outer elastic member 13 includes a back-side end converging portion 13s bundled so as to extend along the front-rear direction, and a ventral-side end converging portion 13s bundled so as to extend along the front-rear direction. , And a non-converging part in which the elastic members 13 are spaced apart from each other as an intermediate part thereof.

  The inner elastic member 13 includes a back end converging portion 13s bundled so as to extend along the front-rear direction, and a ventral end converging portion 13s bundled so as to extend along the front-rear direction. In the vicinity of the dorsal end portion converging portion 13s in the portion between the dorsal side and the ventral end converging portion 13s, the direction is changed so as to be positioned on the outer side in the width direction from the center of the diaper in the front-rear direction to the fastening tape side. In the vicinity of the ventral end portion converging portion 13s of the portion between the dorsal inclined converging portion 13t and the dorsal side and ventral end portion converging portion 13s, the center of the diaper is moved from the center in the front-rear direction to the fastening tape. The elastic member 1 as an intermediate portion between the ventral side inclined converging portion 13t extending obliquely while changing the direction so as to be positioned on the outer side in the width direction, and the dorsal side and the ventral side inclined converging portion 13t. And a non-convergent portions mutually spaced.

  The back side and ventral side end converging portions 13 s of the outer and inner elastic members 13 are provided above the legs around the side flap portions SF, and in particular, the back side end converging portion 13 s of the fastening tape 5 is provided. It is provided at a position overlapping the base end. In particular, the dorsal and ventral end converging portions 13s are preferably formed in a straight line that does not follow the front-rear direction, or a curved line such as a gentle arc, rather than a straight line extending in the front-rear direction. .

  Further, the dorsal and ventral end convergent portions 13s of the outer and inner elastic members 13 are converged as a single bundle, and a part or all of the end portions are not bonded and fixed. This is because the elastic member 13 is simultaneously cut by cutting at the front and rear edges performed at the time of manufacture, and the front and rear end portions of the elastic member 13 are contracted to be drawn between the exterior sheet 12 and the backsheet 1 and from the front and rear edges. This is to prevent it from protruding. As a result, a cylindrical passage 12r is formed between the exterior sheet 12 and the back sheet 1 as indicated by a dotted line in FIG. This passage 12r opens at the front and rear edges of the product. The other parts of the outer and inner elastic members 13 are adhesively fixed to both sheets 12 and 1 in an extended state, including the back side and ventral side inclined converging parts 13t of the inner elastic member 13.

  In the tape-type disposable diaper thus configured, the side flap portion SF exhibits elasticity not only in the leg-surrounding direction but also in the waistline direction. In particular, the inner elastic member 13 on the back side has a convergent portion extending to a portion overlapping with the base end portion of the fastening tape 5 and is fixed in an expanded state. It is possible to follow and exhibit excellent performance, and it has excellent fit.

(Other)
The method of the present invention can also be applied to a configuration in which an elastic member is attached between a top sheet and a back sheet as in the conventional example.

  The present invention is used for a method of attaching an elastic member in manufacturing an absorbent article.

It is a flowchart which shows the manufacturing process of a tape-type disposable paper diaper. It is a top view which shows the rocking | swiveling state at the time of elastic member attachment. It is a top view which shows the rocking | swiveling state at the time of elastic member attachment. It is a top view which shows the rocking | swiveling state at the time of elastic member attachment. It is a top view which shows the rocking | swiveling state at the time of elastic member attachment. It is a top view which shows another attachment pattern. It is a top view which shows another attachment pattern. It is a top view which shows the inner surface side of the expansion | deployment state of a tape-type disposable diaper. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a principal part enlarged plan view. It is a top view which shows the outer surface side of the expansion | deployment state of a tape-type disposable diaper.

  DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorber, 4 ... Barrier sheet, 5 ... Fastening tape, 6 ... Target tape, 7 ... Elastic member, 8 ... Base material sheet, 9 ... Hook tape, 10 ... perforation, 12 ... exterior sheet, 13 ... elastic member, 30 ... swinging part, 31 ... passage, 32 ... guide body.

Claims (3)

In the method of continuously supplying and attaching a plurality of elongated elastic members to the attachment position in the attached sheet while continuously conveying the attached sheet,
A swinging portion swinging in the CD direction is provided in the path of the plurality of elongated elastic members toward the mounting position,
The swinging portion is provided with a plurality of passages along the MD direction at intervals in the CD direction, and a guide body that moves in the CD direction with respect to the passage is provided near the downstream side of the passage in the swinging portion in the CD direction. Multiple in
The plurality of elongate elastic members are individually passed through the passages, and some of the elongate elastic members or all of the elongate elastic members are passed between the guide bodies, and then the attachment is performed. To the location,
While the plurality of elongated elastic members are swung by the swing of the swinging portion, the interval between the guide bodies is widened so that the plurality of elastic members passed between the guide bodies are moved in the CD direction of the passage. Attaching to the attached sheet at intervals according to the interval, and converging and attaching a plurality of elongated elastic members passed between the guides by narrowing the interval between the guides,
A method for attaching an elastic member. While the swinging part is located in the middle part of the swinging range, keep the gap between the guides widened,
While the rocking part moves from the intermediate part to the first position before reaching the rocking end on one side in the CD direction, the interval between the guide bodies is narrowed toward the one side in the CD direction,
While the swinging part has reached the swinging end on the one side in the CD direction from the first position and then moved back to the other side in the CD direction and moved to the second position before reaching the intermediate part, Keep the distance between the guides narrow,
While the swinging portion moves from the second position to the intermediate portion, the interval between the guide bodies is increased toward the other side in the CD direction.
The attachment method of the elastic member of Claim 1. Four guide bodies are juxtaposed in the CD direction, between the adjacent first guide body and the second guide body, and between the adjacent third guide body and the fourth guide body, respectively. While passing a plurality of elastic members,
The interval between the first guide body and the second guide body and the position of the interval portion and the interval between the third guide body and the fourth guide body and the position of the interval portion are changed independently of each other.
The attachment method of the elastic member of Claim 1.

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