JP6078337B2 - Elastic sheet manufacturing equipment - Google Patents

Description

  The present invention provides a stretchable sheet manufacturing apparatus in which individual thread-like elastic members in an extended state are interposed between a pair of continuous sheets and are joined along a crossing direction intersecting the continuous direction of the continuous sheet, And a manufacturing method.

  Conventionally, an elastic sheet has been used as a functional part of an absorbent article such as a disposable diaper. Then, as shown in the schematic perspective view of FIG. 1A, in the manufacturing process, the stretchable sheet is generated in the form of a continuous sheet 10m as the intermediate part. Further, in the stretchable sheet 10m of the intermediate part, for example, the individual thread-like elastic members 13, 13... Stretched between the pair of continuous sheets 11, 12 intersect with the continuous direction of the continuous sheets 11, 12. It is in a state of being interposed and joined in a state along the CD direction.

  This intermediate product stretchable sheet 10m manufacturing apparatus 120 has a pair of upper and lower parts which are driven and rotated while the corresponding continuous sheets 11 and 12 are wound around the outer peripheral surfaces 21ua and 21da, respectively. A transport mechanism 131 that transports the continuous body 13a of the thread-like elastic member between the rolls 21u and 21d and the pair of continuous sheets 11 and 12 that are overlapped and joined by the pair of upper and lower rolls 21u and 21d. A winding mechanism 141 for winding the continuous body 13a of the thread-like elastic member around the transport mechanism 131 while feeding the continuous body 13a of the thread-like elastic member.

  The conveyance mechanism 131 includes a pair of belt-shaped conveyance units 132 and 132 provided at respective positions closer to the end side in the CD direction than the continuous sheets 11 and 12 as main bodies. Then, the pair of belt-like conveyance units 132 and 132 conveys the continuous body 13a of the thread-like elastic member wound around itself in the wound state with the longitudinal direction as the conveyance direction.

  Here, in this winding state, the continuous body 13a of the thread-like elastic member is stretched around the pair of belt-like conveyance units 132, 132 in the CD direction. That is, the continuous body 13a of the thread-like elastic member is provided on the upper portions of the pair of belt-like transport portions 132 and 132 from above, and on the lower portions of the pair of belt-like transport portions 132 and 132, respectively. The transfer portions 13ac extended from below are alternately provided in the transport direction.

  Further, the span portion 13ac immediately after the winding is inclined with respect to the CD direction. For this reason, while the transfer portion 13ac is being transferred toward the pair of rolls 21u and 21d, the belt-like transfer portions 132 and 132 are respectively configured to gradually correct this inclination and eliminate the inclination gradually. A pair of upper and lower endless belts 133u and 133d arranged side by side in the vertical direction is a main body. That is, by making a difference in the respective conveyance speed values between the pair of endless belts 133u, 133d, each spanning portion 13ac that is slanted with respect to the CD direction at the beginning of winding is positioned substantially parallel to the CD direction. It has corrected even to. And thereby, each spanning part 13ac which became substantially parallel to this CD direction is interposed between the continuous sheets 11 and 12, and is joined. Then, in order to change each spanning part 13ac of the continuous body 13a of the thread-like elastic member into individual thread-like elastic members 13, 13,... The continuous body 13a of the thread-like elastic member is cut by 181 and 181, and the above-described stretchable sheet 10m is generally generated as the continuous sheet 10m as described above.

  However, if the continuous body 13a of the thread-like elastic member is cut, as shown in FIG. 1A, the individual thread-like elastic members 13, 13... From each edge 10mew, 10mew in the width direction of the continuous sheet 10m in the CD direction. The ends 13e and 13e may protrude, and the appearance may be a problem. For this reason, in Patent Document 1, after cutting the continuous body 13a of the thread-like elastic member by the blade members 181 and 181 as described above, as shown in FIG. 1B, each of the width direction of the continuous sheet 10m is further cut by the cutting mechanism 185. It is disclosed to cut off the end portions 10me and 10me.

JP2012-90836

  However, in the method of Patent Document 1, when the stretched state is released in the state of the stretchable sheet 10 of the final part shown in FIG. 1B, there are a wide portion and a narrow portion in the width direction. There may be a problem with appearance. Details are as follows.

  First, immediately after the cutting of the continuous body 13a of the thread-like elastic member by the blade member 181 in FIG. 1A, a portion 13e that protrudes from the edge 10mew of the continuous sheet 10m to the end side among the individual thread-like elastic members 13, 13. The tension is released and contracts. Then, depending on the joining state of the pair of continuous sheets 11 and 12 and the thread-like elastic member 13 which are the continuous sheets 10 m, the contraction occurs while relatively sliding with respect to the continuous sheets 11 and 12 mainly at the end in the CD direction. The thread-like elastic members 13, 13.

  Here, it is sufficiently assumed that the thread-like elastic members 13, 13... Appear sporadically. In this case, the extended state of each end portion 10me of the continuous sheet 10m in FIG. 1B is a continuous state of the continuous sheet 10m. It differs depending on the position of the direction, that is, the extended state of the end portion 10me varies. Then, in the state in which the extended state of the end portion 10me is varied as described above, the end portion 10me, 10me of the continuous sheet 10m is cut off by the cutting mechanism 185 of FIG. Since the shrinkage amount of the end portion 10me of the continuous sheet 10m varies in the first place in the stretchable sheet 10 that has finally been released from the stretched state, the influence is finally It extends to the end portion 10e of the elastic sheet 10 of the component, and as a result, the elastic sheet 10 has a wide portion and a narrow portion in the width direction (CD direction), and the appearance is poor. There is a risk of becoming.

  This invention is made | formed in view of the above conventional problems, The objective is to make the appearance of the elastic sheet after the manufacture and cancellation | release of an expansion | extension state become favorable.

The main invention for achieving the above object is:
An apparatus for producing a stretchable sheet in which individual thread-like elastic members in an elongated state are interposed between a pair of continuous sheets and are joined in a state along a crossing direction intersecting the continuous direction of the continuous sheet. And
A joining mechanism for superposing and joining the pair of continuous sheets while transporting along the continuous direction of the continuous sheets;
A transport mechanism that transports the continuous body of the thread-like elastic member toward the space between the pair of continuous sheets that are overlapped and joined by the joint mechanism;
A winding mechanism that winds the continuous body of the thread-like elastic member in an extended state around the transport mechanism while feeding out the continuous body of the thread-like elastic member;
A cutting mechanism that cuts each end in the crossing direction from the pair of continuous sheets joined by the joining mechanism,
The cutting mechanism cuts the end portion to cut a continuous body of the thread-like elastic members interposed between the pair of continuous sheets, thereby generating the individual thread-like elastic members. It is a manufacturing apparatus of an elastic sheet .
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, it is possible to improve the appearance of the stretchable sheet after being released from the stretched state.

1A and 1B are schematic perspective views of a conventional manufacturing apparatus 120 for a stretchable sheet 10. FIG. 2A is a schematic plan view of the stretchable sheet 10 manufactured by the manufacturing apparatus 20 of the first embodiment, and FIG. 2B is a view taken along the line BB in FIG. 2A. It is a schematic perspective view of the manufacturing apparatus 20 of the elastic sheet 10 of this embodiment. 3 is a schematic central cross-sectional view of a winding part 46. FIG. 5A is a schematic side view of the joining mechanism 21 provided with the excision mechanism 51, and FIG. 5B is a view taken along the line BB in FIG. 5A. 6A is a view taken along arrow VI-VI in FIG. 5A, and FIG. 6B is a view taken along arrow BB in FIG. 6A. It is a schematic plan view of the continuous sheet 11 (12) which shows the application | coating object area | region and non-application | coating area | region of an adhesive agent.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An apparatus for producing a stretchable sheet in which individual thread-like elastic members in an elongated state are interposed between a pair of continuous sheets and are joined in a state along a crossing direction intersecting the continuous direction of the continuous sheet. And
A joining mechanism for superposing and joining the pair of continuous sheets while transporting along the continuous direction of the continuous sheets;
A transport mechanism that transports the continuous body of the thread-like elastic member toward the space between the pair of continuous sheets that are overlapped and joined by the joint mechanism;
A winding mechanism that winds the continuous body of the thread-like elastic member in an extended state around the transport mechanism while feeding out the continuous body of the thread-like elastic member;
A cutting mechanism that cuts each end in the crossing direction from the pair of continuous sheets joined by the joining mechanism,
The cutting mechanism cuts the end portion to cut a continuous body of the thread-like elastic members interposed between the pair of continuous sheets, thereby generating the individual thread-like elastic members. It is a manufacturing apparatus of an elastic sheet.

  According to such a stretchable sheet manufacturing apparatus, when cutting the ends of a pair of continuous sheets, the continuous body of the thread-like elastic member is cut together with the cutting of the ends, thereby forming a continuous sheet. The continuous body of interlaced thread-like elastic members is changed into individual thread-like elastic members. Therefore, since the ends of the pair of continuous sheets are cut out in the state where the stretched portions of the portions corresponding to the individual thread-like elastic members are substantially aligned with each other in the continuous body of the thread-like elastic members, The variation in the dimension of the stretchable sheet after the stretched state is released is also suppressed, and as a result, the appearance can be improved.

An apparatus for producing such an elastic sheet,
The joining mechanism is
A first roll that conveys the one continuous sheet by rotating while driving one continuous sheet of the pair of continuous sheets around the outer peripheral surface;
The outer peripheral surface of the first roll is provided facing the outer peripheral surface, and the other continuous sheet of the pair of continuous sheets is driven and rotated while being wound around the outer peripheral surface. A second roll for conveying
The conveyance mechanism conveys the continuous body of the thread-like elastic member toward the space between the pair of continuous sheets that are overlapped and joined by the first roll and the second roll,
It is desirable that the cutting mechanism cuts the end portion in a state where the pair of joined continuous sheets are wound around the outer peripheral surface of one of the first roll and the second roll.

  According to such a stretchable sheet manufacturing apparatus, the ends are cut from the pair of continuous sheets in a state where the pair of continuous sheets are wound around the outer peripheral surface of the roll. Thereby, based on the effect | action of the frictional force of an outer peripheral surface, an edge part can be excised in the state which controlled the shrinkage | contraction of the said cross direction of the continuous sheet. Therefore, the edge part of a continuous sheet can be excised with high dimensional accuracy, and as a result, the dimensional accuracy in the cross direction of the continuous sheet after excision can be increased.

An apparatus for producing such an elastic sheet,
In the case where the pair of continuous sheets joined are cut off by the cutting mechanism in a state where the continuous sheet is wound around the outer peripheral surface of the first roll,
The cutting mechanism is formed along a circumferential direction on the outer peripheral surface of the first roll corresponding to each of the pair of blade members arranged corresponding to each end of the continuous sheet and the pair of blade members. A pair of endless grooves, and
In the pair of grooves, blade edges of corresponding blade members among the pair of blade members are inserted, respectively.
When the pair of continuous sheets wound around the outer peripheral surface of the first roll pass through the position of the blade member by the drive rotation of the first roll, the end portion is cut off from the continuous sheet by the blade edge. Is desirable.

  According to such a stretchable sheet manufacturing apparatus, it is possible to cut the end portion in a state in which the pair of continuous sheets joined are wound around the first roll.

An apparatus for producing such an elastic sheet,
In the end portions of the pair of continuous sheets, it is desirable that the three members of the continuous body of the pair of continuous sheets and the thread-like elastic member are not joined to each other.

  According to such a stretchable sheet manufacturing apparatus, the three continuous members of the pair of continuous sheets and the thread-like elastic member are not joined to each other at the ends of the pair of continuous sheets. Therefore, when the end portion is cut off from the continuous sheet by the cutting mechanism, these three members are disassembled apart, and the thread-like elastic member can be quickly removed from the transport mechanism. Therefore, in order to remove the thread-like elastic member belonging to the end from the transport mechanism, it is not necessary to further cut the thread-like elastic member.

An apparatus for producing such an elastic sheet,
The transport mechanism has a pair of transport units provided at respective positions on the end side in the intersecting direction with respect to the continuous sheet,
The winding mechanism is wound so as to be in a state where a continuous body of the thread-like elastic member is stretched in the crossing direction with respect to the pair of transport units,
When the cutting mechanism cuts off the end portion, the continuous body of the thread-like elastic members intersects the individual thread-like elastic members interposed between the pair of continuous sheets and the individual thread-like elastic members. It is separated into a loop-shaped end material through which the transport unit is passed while being positioned on the end side in the direction,
It is desirable to have a cutting mechanism that cuts off the end material after excision by the excision mechanism so as to remove the end material from the conveying portion that passes through the inner peripheral side of the loop-shaped end material.

  According to such a stretchable sheet manufacturing apparatus, even when the three continuous members of the pair of continuous sheets and the thread-like elastic member are joined to each other at the ends of the pair of continuous sheets, the cutting mechanism It is possible to remove the loop-shaped end material generated from the continuous body of the thread-like elastic member smoothly and quickly from the conveying unit.

Also,
This is a method for producing a stretchable sheet in which an individual thread-like elastic member in an extended state is interposed between a pair of continuous sheets in a state along a crossing direction intersecting the continuous direction of the continuous sheet. And
Overlapping and joining the pair of continuous sheets while being conveyed along the continuous direction of the continuous sheets by a joining mechanism;
Transporting the continuous body of the thread-like elastic member by a transport mechanism toward the space between the pair of continuous sheets that are overlapped and joined by the joining mechanism;
Winding the continuous body of the thread-like elastic member in an extended state around the transport mechanism while feeding out the continuous body of the thread-like elastic member;
Cutting each end in the crossing direction from the pair of continuous sheets joined by the joining mechanism,
Manufacturing the stretchable sheet, wherein the individual thread-like elastic members are generated by cutting the end portions to cut the continuous body of the thread-like elastic members interposed between the pair of continuous sheets. Is the method.

  According to such a method for producing an elastic sheet, when cutting the end portions of the pair of continuous sheets, the continuous body of the thread-like elastic member is cut together with the cutting of the end portions, thereby forming a continuous sheet. The continuous body of interlaced thread-like elastic members is changed into individual thread-like elastic members. Therefore, since the ends of the pair of continuous sheets are cut out in the state where the stretched portions of the portions corresponding to the individual thread-like elastic members are substantially aligned with each other in the continuous body of the thread-like elastic members, The variation in the dimension of the stretchable sheet after the stretched state is released is also suppressed, and as a result, the appearance can be improved.

=== This Embodiment ===
FIG. 2A is a schematic plan view of the stretchable sheet 10 manufactured by the manufacturing apparatus 20 of the present embodiment. Moreover, FIG. 2B is a BB arrow line view in FIG. 2A.
The stretchable sheet 10 is a continuous sheet 10 that is continuous in a continuous direction, and is used as a part of a disposable diaper, for example. More specifically, the stretchable sheet 10 is used as a functional component that imparts stretchability to, for example, a side flap or a waist part of a diaper.

  The stretchable sheet 10 includes a pair of continuous sheets 11 and 12 that are overlapped and joined in the thickness direction, and a plurality of individual thread-like elastic members that are interposed between the pair of continuous sheets 11 and 12. ... A plurality of thread-like elastic members 13 are arranged at intervals in the continuous direction along the width direction perpendicular to the continuous direction of the continuous sheets 11 and 12. Each thread-like elastic member 13 is joined to at least one continuous sheet 11 (12) in an expanded state. Therefore, the stretchable sheet 10 is given stretchability in the width direction by the thread-like elastic members 13, 13. That is, if each thread-like elastic member 13, 13... Shrinks, the continuous sheets 11 and 12 also shrink in the width direction and become a plurality of wrinkles. However, the shrinkage force of the thread-like elastic members 13, 13. If the continuous sheets 11 and 12 are pulled against each other, the wrinkles are extended and the continuous sheets 11 and 12 are expanded.

  Incidentally, in this stretchable sheet 10, the continuous sheets 11, 12 and the thread-like elastic members 13, 13... Are not projected from the edge 10 ew in the width direction of the continuous sheets 11, 12. The three dimensions in the width direction are aligned with each other. This is because the end portions 10je and 10je of the pair of continuous sheets 11 and 12 are cut out by the cutting mechanism 51, which will be described later, and the end edges 10ew are cut out. It is due to being.

  In the example of FIG. 2A, the thread-like elastic members 13, 13,... Are arranged in the continuous direction at a constant arrangement pitch P0 with respect to the continuous sheets 11, 12, but the arrangement pitch P0 is limited to such an equal pitch. It is not a thing. For example, the arrangement pitch P0 may change periodically.

  The thread-like elastic member 13 is, for example, a plurality of elastic filaments joined together to form a bundle, and the elastic filament is, for example, a synthetic resin fiber such as polyurethane fiber or PTT fiber. A specific example of the thread-like elastic member 13 is “Lycra (trademark) DuPont”. Further, the diameter of the thread-like elastic member 13 is, for example, 0.2 mm to 0.5 mm in a natural length state that is a non-extended state, and 0.1 mm to 0.00 mm in a state that is extended up to three times the natural length. 3 mm.

  On the other hand, the pair of continuous sheets 11 and 12 are made of a nonwoven fabric, a woven fabric, a film, or the like. Then, both the pair of continuous sheets 11 and 12 may be made of the same material, or may be made of different materials depending on the case. In addition, about the material types, such as a nonwoven fabric, a woven fabric, and a film, the existing thing can be used suitably. For example, for non-woven fabrics and woven fabrics, single fibers made of thermoplastic resins such as polyethylene or polyethylene terephthalate, composite fibers with a sheath core structure, and combinations thereof can be used. Also, those made of the thermoplastic resin exemplified above can be used.

  Further, an adhesive is interposed between the pair of continuous sheets 11, 12, and at least one of the pair of continuous sheets 11, 12 and the pair of continuous sheets 11, 12 is continuous by this adhesive. The sheet 11 (12) and the respective thread-like elastic members 13, 13... Are joined and integrated. As such an adhesive, for example, a hot melt adhesive can be used. Moreover, as an application pattern of the adhesive to the surface of the continuous sheet 11 (12), a stripe pattern in which a plurality of straight lines along the continuous direction are arranged in the width direction may be used, or a plurality of spiral lines along the continuous direction. May be a spiral line group pattern arranged in the width direction, or a so-called solid coating pattern in which an adhesive is applied over the entire predetermined area.

FIG. 3 is a schematic perspective view of the manufacturing apparatus 20 for the stretchable sheet 10.
As shown in FIG. 3, the manufacturing apparatus 20 is superposed and joined by a joining mechanism 21 that superposes and joins a pair of continuous sheets 11 and 12 while being conveyed along the continuous direction. A conveyance mechanism 31 that conveys the continuous body 13a of the thread-like elastic member toward the pair of continuous sheets 11 and 12, and a continuous body of the filamentous elastic member to the conveyance mechanism 31 while feeding the continuous body 13a of the filamentous elastic member. From a winding mechanism 41 for winding 13a in an extended state and a pair of continuous sheets 11 and 12 joined by the joining mechanism 21 (hereinafter also referred to as joined continuous sheet 10j or simply continuous sheet 10j) in the width direction A cutting mechanism 51 (not shown in FIG. 3) for cutting each end 10je, 10je is provided.

The transport mechanism 31 includes a pair of belt-shaped transport units 32 and 32 as main bodies, and each belt-shaped transport unit 32 is disposed at each position on the end side in the width direction from the continuous sheets 11 and 12, respectively. Each of the belt-like transport units 32 and 32 can transport the continuous body 13a of the thread-like elastic member along the longitudinal direction thereof, that is, transport the continuous body 13a of the thread-like elastic member with the longitudinal direction as the transport direction. To do.
Therefore, the continuous body 13a of the thread-like elastic member wound around the pair of belt-like transport portions 32 and 32 by the winding mechanism 41 is sequentially transported toward the joining mechanism 21 in this wound state. And in this winding state, the continuous body 13a of the thread-like elastic member is stretched across the pair of belt-like transport portions 32, 32 in the width direction. That is, the continuous body 13a of the thread-like elastic member includes an upper spanning portion 13ac (hereinafter also referred to as an upper spanning portion 13ac) that is spanned from above on each of the upper portions of the pair of belt-shaped transport portions 32 and 32, and A pair of belt-like conveyance sections 32, 32 has a crossover portion 13ac (hereinafter also referred to as a lower crossover portion 13ac) that is stretched from below to the lower portions of the belt-shaped conveyance sections 32, 32 alternately.

  Moreover, the span 13ac immediately after winding is in an inclined state with respect to the width direction. Therefore, in order to gradually correct this inclination and substantially eliminate this inclination while the transfer portion 13ac is being transferred toward the joining mechanism 21, the belt-like transfer portions 32 and 32 are each provided with a predetermined device. Is given. That is, each of the belt-like conveyance units 32 and 32 intersects with both the conveyance direction of the continuous body 13a of the thread-like elastic member and the width direction of the continuous sheets 11 and 12 (corresponding to the vertical direction in the example of FIG. 3). A pair of endless belts 33u and 33d arranged side by side as a main body, and by making a difference in each conveyance speed value between the pair of endless belts 33u and 33d, the winding is inclined with respect to the width direction at the beginning. Each spanned portion 13ac is corrected to a posture substantially parallel to the width direction. As a result, the spanning portions 13ac that are substantially parallel to the width direction are overlapped and joined to the surfaces of the continuous sheets 11, 12 while being interposed between the continuous sheets 11, 12. The Incidentally, the upper portions of the pair of belt-like conveyance portions 32, 32 correspond to the pair of upper endless belts 33u, 33u, respectively, and the lower portions of the pair of belt-like conveyance portions 32, 32 are also the lower portions of the pair. This corresponds to the endless belts 33d and 33d.

  After this joining, the end portions 10je and 10je in the width direction are cut off from the joined continuous sheet 10j as the pair of continuous sheets 11 and 12 by the cutting mechanism 51. At this time, by the cutting, the continuous body 13a of the thread-like elastic member that is interposed and joined between the pair of continuous sheets 11 and 12 is also cut together, whereby each hook of the continuous body 13a is cut. The transfer portions 13ac, 13ac... Are changed to individual thread-like elastic members 13, 13. And the elastic sheet 10 is completed with the above.

  Hereafter, each structure 21, 31, 41, 51 is demonstrated. In the following description, the continuous direction of the continuous sheets 11 and 12 is also referred to as “MD direction”, and the direction orthogonal to the MD direction, that is, the width direction of the continuous sheets 11 and 12 is referred to as “CD direction”. " For convenience of explanation, three directions orthogonal to each other are defined as a vertical direction, a front-rear direction, and a left-right direction. In this example, the up-down direction is parallel to the vertical direction, and the front-rear direction and the left-right direction are parallel to the horizontal direction. The CD direction and the left-right direction are the same direction. Furthermore, the conveyance direction of the continuous body 13a of the filamentous elastic member by the conveyance mechanism 31 is parallel to the front-rear direction. Incidentally, the CD direction (left-right direction) corresponds to the “crossing direction” according to the claims.

<<< joining mechanism 21 >>>
The joining mechanism 21 includes a pair of upper and lower rolls 21u and 21d that are driven and rotated about rotation axes C21u and C21d facing the CD direction. Then, one continuous sheet 11 of the pair of continuous sheets 11 and 12 is wound around the upper roll 21u as the first roll at a predetermined winding angle, and the lower roll 21d as the second roll is wound around the lower roll 21d. The other continuous sheet 12 is wound at a predetermined winding angle. Both of the continuous sheets 11 and 12 are held in a state in which there is almost no relative slip between the outer peripheral surfaces 21ua and 21da of the rolls 21u and 21d to be wound, thereby driving the rolls 21u and 21d. With the rotation, the continuous sheets 11 and 12 are transported along the rotation directions Dcu and Dcd of the rolls 21u and 21d substantially integrally with the outer peripheral surfaces 21ua and 21da of the corresponding rolls 21u and 21d.

  When the outer peripheral surfaces 21ua and 21da of the pair of rolls 21u and 21d pass through the closest position Pn (hereinafter also referred to as the nip position Pn), the upper continuous sheet 11 and the lower continuous sheet 12 are The layers are overlapped in the vertical direction, ie, the thickness direction, and sandwiched between the layers, whereby the two are joined together by an adhesive previously applied to at least one of the surfaces to be overlapped. As described above, immediately before the joining, between the pair of continuous sheets 11 and 12, the extended portion 13ac of the continuous body 13a of the stretched yarn-like elastic member is in the CD direction (width direction). Since it is put in along, the three parts of the upper and lower continuous sheets 11 and 12 and the spanning portion 13ac of the continuous body 13a of the thread-like elastic member are joined and integrated at the time of joining.

<<< Conveyance mechanism 31 >>>
As shown in FIG. 3, the transport mechanism 31 has belt-shaped transport portions 32 and 32 on the left and right in the CD direction, respectively. Each belt-shaped transport unit 32 is disposed so as to straddle the joining mechanism 21 in the front-rear direction while the longitudinal direction thereof is directed in the front-rear direction, and thereby, the elastic thread is straddled across the joining mechanism 21 along the front-rear direction. A conveyance path for the continuous body 13a is formed.

  Each belt-like conveyance unit 32 has a pair of upper and lower endless belts 33u and 33d. Each endless belt 33u, 33d is wound around a pair of pulleys 34u, 34u, 34d, 34d disposed at both ends in the front-rear direction. At least one of the pulleys 34u and 34d is connected to servo motors 35u and 35d serving as drive sources, so that the rotational speed value can be set for each of the endless belts 33u and 33d.

Further, by setting the orientations of the pulleys 34u, 34u, 34d, and 34d, the endless tracks 33u and 33d are arranged so that the orbits of the endless belts 33u and 33d are located closer to the end side in the CD direction and in the CD direction than the end side track Tr1. The center side track Tr2 is located on the center side. In the end-side track Tr1, the endless belts 33u and 33d move forward in the front-rear direction, while in the center-side track Tr2, move backward, and are thus wound around the pair of belt-like conveyance units 32 and 32. The continuous body 13a of the filamentous elastic member is held by the endless belts 33u, 33d, 33u, and 33d that move on the end-side track Tr1, so that it is conveyed forward in the front-rear direction and finally reaches the joining mechanism 21. It has become.
Incidentally, the direction of the belt surfaces of the endless belts 33u and 33d is basically the direction in which the normal direction of the surfaces is parallel to the CD direction, but in some cases, for example, greater than 0 ° and less than 60 ° from the CD direction. It may be inclined in the angle range.

<<< winding mechanism 41 >>>
As shown in FIG. 3, the winding mechanism 41 includes a thread-like elastic member from a coil body 13C of a thread-like elastic member (a continuous body 13a of the thread-like elastic member wound around a suitable winding member such as a bobbin in a coil shape). The continuous body 13a is wound around the rear end portion 31b of the transport mechanism 31 while being fed out. Therefore, the winding mechanism 41 includes a feeding part 43 that feeds the continuous body 13a of the thread-like elastic member from the coil body 13C of the thread-like elastic member that is rotatably supported by the reel mechanism 42, and a thread-like elasticity that is fed from the feeding part 43. And a winding portion 46 that winds the member continuous body 13 a around the rear end portion 31 b of the transport mechanism 31.

  The feeding portion 43 feeds the continuous body 13a of the thread-like elastic member from the coil body 13C attached to the reel mechanism 42 and sets the tension of the continuous body 13a within a predetermined tension range, and then the winding speed of the winding portion 46. In conjunction with the value (m / min), the continuous body 13a of the thread-like elastic member is supplied to the winding section 46 at a predetermined supply speed value (m / min) corresponding to the winding speed value.

  Here, the above-described tension range is determined in advance based on the minimum tension in a range in which the continuous body 13a of the thread-like elastic member does not loosen, and is, for example, 0.0298N to 0.098N. Thus, basically, the ratio of the winding speed value of the winding section 46 to the supply speed value of the feeding section 43 is the continuous body 13a of the thread-like elastic member at the time of winding around the transport mechanism 31. The expansion magnification is. Therefore, by adjusting the supply speed value in conjunction with the winding speed value, the continuous body 13a of the thread-like elastic member can be wound around the transport mechanism 31 almost always at the target extension magnification. Incidentally, the expansion ratio is an index indicating how many times the continuous body 13a of the thread-like elastic member is extended from its natural length. For example, the length LS in the extended state is divided by the natural length L0. The divided value (= LS / L0).

  As a specific configuration example of the feeding portion 43, an upstream position in the supply route of the continuous body 13a of the filamentous elastic member from the coil body 13C of the reel mechanism 42 to the winding portion 46, that is, close to the coil body 13C. And a supply roll 45 provided at a position downstream of the tension controller 44 in the supply route, that is, at a position close to the winding portion 46 in the supply route. Here, the tension controller 44 performs feedback control of the feed amount from the coil body 13C so that the tension of the continuous body 13a of the thread-like elastic member at the nearest downstream position falls within a predetermined tension range. As a configuration example, it has a sensor 44s for measuring the tension at the nearest downstream position, and a feeding drive pulley 44p provided at a position upstream of the travel route from the measurement position of the sensor 44s. . Then, a servo motor (not shown) as a drive source of the feeding drive pulley 44p is controlled by an appropriate control device so that the measured value of the tension output from the sensor 44s falls within the preset tension range. The

  FIG. 5 is a schematic central sectional view of the winding portion 46. As shown in FIG. 5, the winding portion 46 includes a bottomed cylindrical member 46 a disposed in the vicinity of the rear end portion 31 b of the transport mechanism 31 as a main body. A cylinder axis C46a of the bottomed cylindrical member 46a is an axis C46a set at a position substantially the same as the center position of the cross section defined by both the vertical direction and the CD direction of the transport mechanism 31. In addition, the axis C46a is set substantially parallel to the front-rear direction. The bottomed cylindrical member 46a is driven to rotate around the cylinder axis C46a. For example, a servo motor 49m is used as the drive source. That is, in the example of FIG. 5, a small-diameter cylindrical body 47 protrudes backward from the bottom 46ab of the bottomed cylindrical member 46a coaxially with the cylinder axis C46a, and is provided integrally with the small-diameter cylindrical body 47. 49p is fixed on the same axis, and the drive pulley 49p receives the drive rotation operation of the drive rotation shaft 49s of the servo motor 49m via the timing belt 49b. Thus, the bottomed cylindrical member 46a is driven to rotate.

Further, pulleys 48p, 48p, and 48p are provided at a plurality of positions in the bottomed cylindrical member 46a to hang the continuous body 13a of the thread-like elastic member. These pulleys 48p, 48p, and 48p are configured such that a continuous body 13a of a thread-like elastic member that is supplied from the feeding portion 43 to the bottomed cylindrical member 46a in a running state is set to a front end portion 46af of the bottomed cylindrical member 46a. This is a guide member that guides to the insertion portion 48 t to 31.
Specifically, the pulleys 48p, 48p, and 48p are respectively a front end position on the inner peripheral side of the small-diameter cylindrical body 47, a rear end position of the cylindrical portion 46at of the bottomed cylindrical member 46a, and a front end position of the cylindrical portion 46at. Further, at the front end position, a loading pulley 48t is separately provided as the above-described loading portion 48t.
Then, the continuous body 13a of the thread-like elastic member supplied from the feeding portion 43 is wound around the pulleys 48p, 48p, 48p in the above order, so that the continuous body 13a of the thread-like elastic member is as follows. To the charging section 48t. That is, first, the continuous body 13a of the thread-like elastic member supplied from the feeding portion 43 passes through the inner peripheral side of the small-diameter cylindrical body 47 and reaches the front end position of the small-diameter cylindrical body 47. Thus, the traveling direction is changed outward in the radial direction of the bottomed cylindrical member 46a and travels along the bottom 46ab of the bottomed cylindrical member 46a. And this traveling leads to the rear end position of the cylindrical portion 46at of the bottomed cylindrical member 46a, but the traveling direction is again changed forward by the pulley 48p at the rear end position to the front end position of the cylindrical portion 46at. It reaches. And finally, it is guided by the pulley 48p at the front end position to the input portion 48t at the same position.

  Note that the input pulley 48t, which is the input portion 48t, has its own rotation axis C48t set parallel to the cylinder axis C46a of the bottomed cylindrical member 46a. Therefore, the pulley 48t can smoothly and quickly feed the continuous body 13a of the thread-like elastic member toward the rear end portion 31b of the transport mechanism 31 positioned on the inner peripheral side of the bottomed cylindrical member 46a.

  Further, the front end portion 46af of the bottomed cylindrical member 46a overlaps the rear end portion 31b of the transport mechanism 31 with respect to the position in the front-rear direction. That is, the rear end portion 31b of the transport mechanism 31 is inserted into the bottomed cylindrical member 46a from the front end portion 46af of the bottomed cylindrical member 46a. Therefore, the continuous body 13a of the thread-like elastic member thrown from the feeding portion 48t at the front end position to the rear end portion 31b of the transport mechanism 31 can be reliably wound around the outer periphery of the rear end portion 31b of the transport mechanism 31. .

<<< Resecting Mechanism 51 >>>
5A to 6B are explanatory views of the excision mechanism 51. FIG. 5A is a schematic side view of the joining mechanism 21 provided with the excision mechanism 51, and FIG. 5B is a view taken along the line BB in FIG. 5A. 6A is a view taken along arrow VI-VI in FIG. 5A, and FIG. 6B is a view taken along arrow BB in FIG. 6A.

  The cutting mechanism 51 is provided for the upper roll 21u of the pair of upper and lower rolls 21u and 21d provided in the joining mechanism 21. Specifically, the cutting mechanism 51 is a pair of blades arranged to correspond to the end portions 11e and 11e (or 12e and 12e) of the continuous sheet 11 (or 12) while facing the outer peripheral surface 21ua of the upper roll 21u. A pair of endless grooves 53, 53 formed along the circumferential direction (rotation direction Dcu) on the outer peripheral surface 21ua of the upper roll 21u corresponding to the pair of blade members 52, 52, respectively. Have. And the blade edge 52e of the blade member 52 corresponding among the pair of blade members 52, 52 is inserted into the pair of groove portions 53, 53, respectively. Further, the insertion position of the blade edge 52e into the groove 53 is set at a position slightly downstream of the nip position Pn in the rotational direction Dcu of the upper roll 21u. Further, a pair of continuous sheets 11 and 12 joined when passing through the nip position Pn are wound around the outer peripheral surface 21ua of the upper roll 21u, and the joined continuous sheet 10j as the pair of continuous sheets 11 and 12 is Due to the drive rotation of the roll 21u, the roll 21u moves substantially along the outer circumferential surface 21ua along the rotation direction Dcu. Therefore, when the joined continuous sheet 10j passes the positions of the pair of blade members 52, 52, the end portions 10je of the joined continuous sheet 10j by the blade edges 52e, 52e of the pair of blade members 52, 52 are provided. 10je is cut.

  As shown in FIG. 5B, at the time of this cutting, not only the joined continuous sheet 10j but also the continuous body 13a of the thread-like elastic member is located at the same position in the CD direction by the blade edges 52e and 52e of the blade members 52 and 52. It is cut at the same time. As a result, the spanning portions 13ac, 13ac,... Of the continuous body 13a of the thread-like elastic member are changed to individual thread-like elastic members 13, 13,. That is, the individual thread-like elastic members 13, 13... Are cut from the continuous body 13a of the thread-like elastic member, and the individual thread-like elastic members 13, 13. It will be in a state belonging to only 12.

Here, as can be seen from the above, both the cutting process of the end portion 10je of the joined continuous sheet 10j and the cutting process of the continuous body 13a of the thread-like elastic member are performed by the same cutting operation. That is, the cutting process of the end portion 10je of the continuous sheet 10j and the cutting process of the continuous body 13a of the filamentous elastic member are performed at the same time. Therefore, immediately before the cutting process of the end portion 10je of the continuous sheet 10j, the thread-like elastic member is still in the state of the continuous body 13a. Further, at this time, in the continuous body 13a of the thread-like elastic member, each of the spanning portions 13ac, 13ac... Corresponding to the individual thread-like elastic members 13, 13. In the state extended in the CD direction by 32, the extended state is substantially aligned with each other between the respective extending portions 13ac, 13ac. In this state, the end portion 10je of the joined continuous sheet 10j is cut off.
Therefore, the dimensional variation phenomenon of the stretchable sheet 10 as described above with reference to FIG. 1B, that is, the stretched state between the individual thread-like elastic members 13, 13... Already generated when the end portion 10 me is cut off. The variation phenomenon of the dimension in the width direction of the stretchable sheet 10 that is manifested after the excision and after the release of the stretched state is effectively suppressed, and as a result, the appearance of the stretchable sheet 10 in the final state is improved. Can be a thing.

  As can be seen from FIGS. 5A and 5B, in this example, the rotary blade 52 is used as the blade member 52. The rotary blade 52 is, for example, a perfect circular disk member 52, and an outer peripheral edge 52e thereof is a cutting edge 52e over the entire circumference. The rotary blade 52 has a shaft member 52s provided coaxially and integrally with the circular center C52, and the shaft member 52s is parallel to the rotation axis C21u of the upper roll 21u. Then, the rotary blade 52 rotates with the shaft member 52s as the rotation axis C52.

  More specifically, the shaft member 52s is rotatably supported by an appropriate fixed system member 55 of the production line via a bearing (not shown). The shaft member 52s is provided with a driving rotational force from a servo motor (not shown) as a driving source via an appropriate power transmission mechanism (not shown) such as a pulley and a timing belt. 52 is driven to rotate. Therefore, high cutting performance can be achieved.

  5A, in this example, the rotation direction of the rotary blade 52 is the same as the rotation direction Dcu of the upper roll 21u. That is, while the upper roll 21u rotates counterclockwise, the rotary blade 52 also rotates counterclockwise in accordance with this. Thus, the movement direction of the outer peripheral edge 52e of the rotary blade 52 at the position Pc (hereinafter referred to as the cutting position Pc) for cutting each end 10je of the continuous sheet 10j is the movement of the outer peripheral surface 21ua of the upper roll 21u. The direction is reversed. Therefore, the edge portion 10je of the continuous sheet 10j is cut in the process in which the cutting edge 52e, which is the outer peripheral edge 52e of the rotary blade 52, moves in the direction opposite to the moving direction of the continuous sheet 10j.

And according to such a cutting | disconnection aspect, cutting | disconnection of the continuous body 13a of the threadlike elastic member made simultaneously with excision of the edge part 10je can also be performed with high cuttability, and as a result, like this embodiment In addition, even if the continuous sheet 10j includes the continuous body 13a of a hard-to-cut thread-like elastic member, the end portion 10je of the continuous sheet 10j can be excised with high cutting performance. Details are as follows.
First, like the continuous body 13a of the thread-like elastic member of this embodiment, the member 13a in which a plurality of elastic filaments are joined in a bundle generally has very poor cutting properties. However, when cutting under the action of a large tension, the member 13a is cut relatively easily.

  In this regard, according to the relationship of the rotation direction as described above, the blade edge 52e of the rotary blade 52 moves in the opposite direction with respect to the movement direction of the continuous sheet 10j. Therefore, when the continuous body 13a of the thread-like elastic member is cut, a large tension acts on the continuous body 13a. Therefore, the cutting performance of the continuous body 13a of the thread-like elastic member can be improved, and as a result, even the continuous sheet 10j including the continuous body 13a of the difficult-to-cut thread-like elastic member has an end portion with high cutting performance. 10 je can be excised.

  However, the direction of the rotation direction is not limited to this. That is, the rotary blade 52 may be rotated in the opposite direction to that described above. That is, the rotation direction of the rotary blade 52 may be opposite to the rotation direction Dcu of the upper roll 21u.

  Further, in this example, as shown in FIG. 5B, the cutting edge 52e of the rotary blade 52 inserted into the groove portion 53 of the outer peripheral surface 21ua of the upper roll 21u forms a pair of continuous sheets 11 and 12 with the bottom surface of the groove portion 53. The joined continuous sheet 10j is cut without being pinched. That is, the depth dimension (mm) of the groove part 53 and the insertion amount (mm) of the blade edge 52e into the groove part 53 so that an appropriate gap exists between the continuous sheet 10j being cut and the bottom surface of the groove part 53. Is set. Therefore, wear of the cutting edge 52e of the rotary blade 52 can be suppressed, and as a result, the life of the rotary blade 52 can be extended.

  As an example of the rotary blade 52, for example, one made of super micro-gain carbide can be exemplified, and more specifically, a round knife (product number FRC28L, blade angle 40 °) manufactured by Kyocera Corporation is used. It can be illustrated.

  In addition, the cutting edge shape of the rotary blade 52 may be either a single blade or a double blade, but here, as shown in FIG. 5B, a double blade is used. However, the blade angle is preferably a large blade angle of 40 ° or more rather than a small blade angle such as 10 ° or 20 °. In the case of the rotary blade 52, many high-hardness ultrafine particles embedded in the base material of the cutting edge 52e are difficult to drop off from the base material, and as a result, the life of the rotary blade 52 can be further extended.

Note that the peripheral speed value (m / min) of the rotary blade 52, that is, the rotational speed value (m / min) at the blade edge 52e is appropriately determined through experiments, trial runs, etc. in consideration of cutting performance. For example, if the peripheral speed value of the rotary blade 52 is set to 1.5 times or more of the peripheral speed value (m / min) of the upper roll 21u, good cutting performance can be achieved.
Further, the following configuration also contributes to the improvement of cutting performance. That is, as shown in FIG. 5A, at the cutting position Pc on the outer peripheral surface 21ua of the upper roll 21u, the joined continuous sheet 10j as the pair of continuous sheets 11 and 12 is wound in surface contact with the outer peripheral surface 21ua of the upper roll 21u. It is in the state. Therefore, the continuous sheet 10j is held by the frictional force with the outer peripheral surface 21ua, that is, the movement of the continuous sheet 10j in the CD direction is restricted.
Therefore, it is possible to effectively prevent the continuous sheet 10j from entering the interior of the groove portion 53 and escaping at the time of cutting, and as a result, the rotary blade 52 can exhibit higher cutting performance. In order to increase the holding force of the outer peripheral surface 21ua of the upper roll 21u, the outer peripheral surface 21ua may be coated with a material having a high frictional force. As an example of the material, plasma coating of a silicon-based coating material can be exemplified. .

  Incidentally, as shown in FIGS. 5A and 6A, each of the end portions 10je and 10je cut by the cutting mechanism 51 is in the form of a continuous belt-like member, but a recovery mechanism 58 for collecting the end portions 10je is also provided. It is provided close to the cutting mechanism 51 of the upper roll 21u. The collection mechanism 58 has suction ports 58h and 58h, respectively, corresponding to the pair of blade members 52 and 52, for example. Each suction port 58h generates suction force by sucking ambient air. Therefore, each end 10je cut by each blade member 52 is sucked and collected by the nearby suction port 58h.

  However, as shown in FIGS. 6A and 6B, each end 10je at this time has a loop-shaped end generated when individual thread-like elastic members 13, 13... Are generated from the continuous body 13a of the thread-like elastic member. The materials 13r, 13r,... Are joined together. And the belt-shaped conveyance parts 32 and 32 of the conveyance mechanism 31 are passed by the inner peripheral side of the said loop-shaped end material 13r, 13r .... Therefore, unless the end materials 13r, 13r... Are cut, the end portions 10je cannot be recovered by the recovery mechanism 58 described above.

  Therefore, in the present embodiment, the cutting mechanisms 61 and 61 for cutting the end materials 13r, 13r,... At predetermined positions between the rotary blade 52 and the suction port 58h of the recovery mechanism 58 are the end portions 10je and 10je. It is arranged corresponding to. In this example, a fixed blade 62 is disposed as the cutting mechanism 61. Therefore, when the loop-shaped end members 13r, 13r... Integrally joined to the end portion 10je pass through the arrangement position of the fixed blade 62, the end members 13r, 13r. Is released, and the end materials 13r, 13r,... As a result, the end portion 10je can be quickly recovered by the recovery mechanism 58.

  By the way, when considering the reason why the cutting mechanism 61 as described above is necessary, this is because the continuous body 13a of the thread-like elastic member is joined to each end portion 10je of the continuous sheet 10j. Therefore, the end member 13r of the thread-like elastic member is present in a loop shape at the cut end portion 10je, and the end member 13r is caught by the belt-like transport unit 32 and cannot be removed.

Therefore, if the application area | region of the adhesive agent for joining in a pair of unjoined continuous sheets 11 and 12 before becoming the joined continuous sheet 10j is devised, the above-mentioned cutting mechanism 61 can be omitted. That is, it is only necessary that the adhesive is not applied to the region corresponding to the cut end 10je. Details are as follows.
The adhesive is basically applied to the surface of at least one of the pair of continuous sheets 11 and 12 at a position upstream of the nip position Pn of the joining mechanism 21 in the rotational directions Dcu and Dcd. However, at the time of this application, as shown in the schematic plan view of FIG. 7, the region corresponding to each end 10je in the surface is set as a non-application region, and the CD is more than the pair of non-application regions. It suffices to apply the adhesive only in the central area of the direction as the application target area.

  And if it does in this way, since the continuous sheet 10j by which a pair of continuous sheets 11 and 12 are joined is not joined in each edge part 10je, each edge part 10je is removed from the continuous sheet 10j by the cutting mechanism 51. At the moment of cutting, the cut end portions 10je, 10je are naturally separated into three parts: the end portion of the continuous sheet 11, the end portion of the continuous sheet 12, and the end materials 13r, 13r of the thread-like elastic member. To do. Therefore, the end portions of the continuous sheets 11 and 12 and the end material 13r are naturally separated from the belt-shaped conveyance unit 32 and are quickly collected by the collection mechanism 58.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the configuration including the pair of upper and lower rolls 21u and 21d is exemplified as the joining mechanism 21, but the present invention is not limited to this. That is, other configurations may be used as long as the pair of continuous sheets 11 and 12 can be stacked and joined while being conveyed. For example, a configuration having a pair of upper and lower endless belts each driving around may be used.

  In the above-described embodiment, the rotary blade 52 is illustrated as an example of the blade member 52 of the cutting mechanism 51. However, the rotary blade 52 is not limited to any member as long as the end portion 10je of the continuous sheet 10j can be cut. For example, instead of the rotary blade 52 described above, a fixed blade may be provided so that the cutting edge is inserted into the groove portion 53 of the outer peripheral surface 21ua of the upper roll 21u, or the groove portion 53 is generated by the generated ultrasonic vibration. You may provide the ultrasonic cutter which cuts off the edge part 10je of the continuous sheet | seat 10j, vibrating the blade edge inserted in the. Further, a cutter roll having a pair of ring-shaped cutter blades is arranged opposite to the outer peripheral surface 21ua of the upper roll 21u, and a receiving portion for receiving the cutter blade is provided on the outer peripheral surface 21ua of the upper roll 21u. Alternatively, the end 10je of the continuous sheet 10j may be clamped between the cutter blade and the receiving portion and cut off.

  In the above-described embodiment, the fixed blade 62 is exemplified as the cutting mechanism 61, but the present invention is not limited to this. That is, as in the case of the above-described excision mechanism 51, a rotary blade that is driven and rotated may be used, or the above-described ultrasonic cutter may be used. Furthermore, it may be configured such that it can be sheared by cutting with a scissors, or may be configured to be clamped and cut.

  In the above-described embodiment, as shown in FIGS. 6A and 6B, the end-side track T1 and the center-side track of the lower endless belt 33d are used as cutting positions at which the fixed blade 62 of the cutting mechanism 61 cuts the loop-shaped end material 13r. Although the position between T2 was illustrated, it is not restricted to this at all. For example, the loop-shaped end material 13r may be cut at a position between the end-side track T1 and the center-side track T2 of the upper endless belt 33u, or the end portion 10je and the conveying portion 32 of the continuous sheet 10j. You may cut | disconnect in the position between.

  In the above-described embodiment, the conveyance mechanism 31 of the continuous body 13a of the thread-like elastic member has a pair of belt-like conveyance portions 32 and 32, and each belt-like conveyance portion 32 has a pair of upper and lower endless belts 33u and 33d. However, it is not limited to this. That is, any other configuration may be used as long as the continuous body 13a of the thread-like elastic member is wound by the winding mechanism 41 and the wound continuous body 13a can be conveyed toward the joining mechanism 21. . For example, a screw-like conveyance unit may be used instead of the belt-like conveyance unit 32. That is, the screw-shaped transport unit has a pair of upper and lower round bar-shaped shaft members, and a spiral groove is formed on the outer peripheral surface of each round bar-shaped shaft member over substantially the entire length. Drive around. And the conveyance mechanism 31 may be comprised by arrange | positioning the screw-shaped conveyance part which has this pair of upper and lower round rod-shaped shaft members in each position of the both sides of CD direction, respectively. Incidentally, in this case, the continuous body 13a of the thread-like elastic member is engaged with the spiral groove on the outer peripheral surface of the round bar-shaped shaft member, and the round bar-shaped shaft member is kept in the axial center while substantially maintaining this engaged state. By rotating and rotating around, the continuous body 13a of the thread-like elastic member wound around the pair of screw-like conveyance portions is conveyed in the conveyance direction.

  In the above-described embodiment, the bonded continuous sheet 10j, that is, the pair of continuous sheets 11 and 12 that have been bonded to each other after passing through the nip position Pn, is wound around the outer peripheral surface 21ua of the upper roll 21u. Absent. For example, it may be wound around the outer peripheral surface 21da of the lower roll 21d. In this case, the cutting mechanism 51 is provided on the outer peripheral surface 21da of the lower roll 21d.

  In the above-described embodiment, the case where both the MD direction as the continuous direction and the CD direction as the intersecting direction are orthogonal to each other is illustrated, but the present invention is not limited thereto. That is, as long as these two are in a crossing relationship with each other, they may not be in an orthogonal relationship.

10 stretchable sheet, 10ew edge, 10j continuous sheet, 10je edge,
10me end,
11 continuous sheet, 11e end,
12 continuous sheets, 12e end,
13 thread-like elastic member, 13C coil body,
13a A continuous body of thread-like elastic members,
13ac spanning part, 13r looped end material,
20 manufacturing equipment,
21 Joining mechanism,
21u upper roll (first roll), 21ua outer peripheral surface,
21d lower roll (second roll), 21da outer peripheral surface,
31 transport mechanism, 31b rear end, 32 belt-shaped transport unit (transport unit),
33u upper endless belt, 23d lower endless belt,
34u pulley, 34d pulley,
35u servo motor, 35d servo motor,
41 winding mechanism, 42 reel mechanism,
43 Feeding section, 44 Tension controller,
44p Drive pulley for feeding, 44s sensor, 45 supply roll,
46 winding part, 46a bottomed cylindrical member, 46af front end part,
46at cylindrical part, 46ab bottom part,
47 Small-diameter cylindrical body, 48p pulley, 48t input part,
49b timing belt, 49p driving pulley,
49m servo motor, 49s drive rotation shaft,
51 cutting mechanism, 52 rotary blade (blade member), 52e outer peripheral edge (blade edge),
52s shaft member, 53 groove part, 55 fixing system member,
58 collection mechanism, 58h suction port,
61 cutting mechanism, 62 fixed blade,
Pc cutting position, Pn nip position,
C21u rotating shaft, C46a cylinder shaft, C48t rotating shaft,
C52 rotation axis,
Tr1 end side track, Tr2 center side track,

Claims (5)

An apparatus for producing a stretchable sheet in which individual thread-like elastic members in an elongated state are interposed between a pair of continuous sheets and are joined in a state along a crossing direction intersecting the continuous direction of the continuous sheet. And
A joining mechanism for superposing and joining the pair of continuous sheets while transporting along the continuous direction of the continuous sheets;
A transport mechanism that transports the continuous body of the thread-like elastic member toward the space between the pair of continuous sheets that are overlapped and joined by the joint mechanism;
A winding mechanism that winds the continuous body of the thread-like elastic member in an extended state around the transport mechanism while feeding out the continuous body of the thread-like elastic member;
A cutting mechanism that cuts each end in the crossing direction from the pair of continuous sheets joined by the joining mechanism,
The cutting mechanism cuts the end portion to cut a continuous body of the thread-like elastic members interposed between the pair of continuous sheets, thereby generating the individual thread-like elastic members. Elastic sheet manufacturing equipment. It is a manufacturing apparatus of the elastic sheet according to claim 1,
The joining mechanism is
A first roll that conveys the one continuous sheet by rotating while driving one continuous sheet of the pair of continuous sheets around the outer peripheral surface;
The outer peripheral surface of the first roll is provided facing the outer peripheral surface, and the other continuous sheet of the pair of continuous sheets is driven and rotated while being wound around the outer peripheral surface. A second roll for conveying
The conveyance mechanism conveys the continuous body of the thread-like elastic member toward the space between the pair of continuous sheets that are overlapped and joined by the first roll and the second roll,
Production of an elastic sheet, wherein the cutting mechanism cuts the end portion in a state in which the pair of continuous sheets joined are wound around the outer peripheral surface of one of the first roll and the second roll. apparatus. It is a manufacturing apparatus of the elastic sheet according to claim 2,
In the case where the pair of continuous sheets joined are cut off by the cutting mechanism in a state where the continuous sheet is wound around the outer peripheral surface of the first roll,
The cutting mechanism is formed along a circumferential direction on the outer peripheral surface of the first roll corresponding to each of the pair of blade members arranged corresponding to each end of the continuous sheet and the pair of blade members. A pair of endless grooves, and
In the pair of grooves, blade edges of corresponding blade members among the pair of blade members are inserted, respectively.
When the pair of continuous sheets wound around the outer peripheral surface of the first roll pass through the position of the blade member by the drive rotation of the first roll, the end portion is cut off from the continuous sheet by the blade edge. An apparatus for producing a stretchable sheet. It is a manufacturing apparatus of the elastic sheet according to any one of claims 1 to 3,
3. The stretchable sheet manufacturing apparatus according to claim 1, wherein three members of the pair of continuous sheets and the continuous body of the thread-like elastic member are not joined to each other at the end portions of the pair of continuous sheets. It is a manufacturing apparatus of the elastic sheet according to any one of claims 1 to 3,
The transport mechanism has a pair of transport units provided at respective positions on the end side in the intersecting direction with respect to the continuous sheet,
The winding mechanism is wound so as to be in a state where a continuous body of the thread-like elastic member is stretched in the crossing direction with respect to the pair of transport units,
When the cutting mechanism cuts off the end portion, the continuous body of the thread-like elastic members intersects the individual thread-like elastic members interposed between the pair of continuous sheets and the individual thread-like elastic members. It is separated into a loop-shaped end material through which the transport unit is passed while being positioned on the end side in the direction,
An apparatus for manufacturing a stretchable sheet, comprising: a cutting mechanism for cutting the end material after excision by the excision mechanism so as to remove the end material from the conveying portion passing through an inner peripheral side of the loop-shaped end material. .

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