JP6355511B2 - Seam felt joining structure and joining method - Google Patents

Description

  The present invention relates to a joining structure, a joining method, and a joining jig for joining both ends of a seam felt in which two rows of loops are formed in the thickness direction.

  In order to improve workability when attaching a felt to a paper machine, so-called seam felts are widely used. It is popular. In this type of seam felt, the loops formed at the end in the length direction by folding back the warp constituting the base fabric are alternately meshed so that the loop holes are aligned with each other, and the core wire is formed in the common hole formed thereby. The structure which joins both ends through is common.

  Since such seam felt joining is a precise manual operation, it is desirable to perform the operation while stabilizing the end of the felt. Moreover, in order to make it easy to visually confirm the meshing state of the loop and the insertion state of the core wire, it is desirable that the end portion of the felt is butted in a mountain shape. Therefore, a temporary joining cloth provided with a slide-type fastener is sewn to the end of the felt in advance, and when the felt has been drawn in, the fastener is applied to temporarily fix both ends of the felt, There is known a technique in which both ends are held in a state of butting in a mountain shape (Patent Document 1).

JP 2005-264402 A

  In a seam felt with loops formed in two rows above and below in the thickness direction, butt up the chevron so that both ends of the felt protrude upward, and then fold the loops on the lower row side, It is desirable that the upper row side loops are multiplied against each other so as to protrude toward the center. Here, after the loops on the lower row side are multiplied, if the loops on the upper row side are tried to be multiplied by the technique described in Patent Document 1, the upper portion of the loop on the upper row side is covered with a fastener. Both ends cannot be pushed downward from above, and it is difficult to align the loops at both ends. In addition, the upper part of the loop on the upper row is covered with a fastener, and the lower part is already multiplied by the loop on the lower row, so it is visually confirmed whether the loop is aligned from above and below the felt. Can not be confirmed.

  In view of such a problem, an object of the present invention is to provide a seam felt joining structure capable of easily and reliably joining both ends of a seam felt in which loops are formed in two rows in the thickness direction.

One aspect of the present invention is a joint structure of seam felt (2), which is provided on the first loop row (14) provided on one side in the thickness direction of both ends in the length direction and on the other side. and a seam felt with a second loop sequence (20), Osamu for the first joint with the end portions of the pair of first joining jig body mounted on one side in the vicinity of the seam felt (30) A tool (26), a pair of engaging members (38) attached to the other side in the vicinity of the both ends of the seam felt, and engaging means (40) for engaging with the pair of engaging members . A second joining jig (28), wherein the first joining jig includes the pair of joining jig bodies in a state where the engaging means is not engaged with the pair of engaging members. The both ends of the seam felt by engaging each other Is configured so that the vicinity of both ends can be held close to each other so that the one side of the both ends abuts each other. By engaging the engaging means with the pair of engaging members in a state in which the pair of joining jig main bodies are not engaged with each other, the jig has the vicinity of the both end portions of the seam felt. A mountain shape is formed toward one side, and the vicinity of the both end portions can be held close to each other so that the other sides of the both end portions face each other .

  According to this configuration, after passing the core wire through the first loop row, in order to align the second loop rows with each other, the seam felt is fastened from the other side by the second joining jig, and both ends of the seam felt are fitted. When the other sides are attached to each other, the alignment state of the second loop rows can be visually confirmed from the other side in the thickness direction, and if there is an inconsistency, the vicinity of both ends of the seam felt by hand etc. Alternatively, the second loops can be pushed in to align the second loop rows at that location. Therefore, it is possible to easily and reliably join both ends of the seam felt.

  Another aspect of the present invention is characterized in that, in the above configuration, the engaging means includes a string (40).

  According to this configuration, after passing the core wire through the first loop row, when the seam felt is fastened from the other side by the second joining jig, the space between the strings spanned between the pair of engaging members. The matching state of the second loop row can be visually confirmed via the, and if there is an unmatched place, the second loop row at that place can be matched by hand or the like.

  According to another aspect of the present invention, in the above configuration, the pair of engagement members includes a plurality of engagement portions (44, 48) that slidably engage the string, and the plurality of engagement portions include: The string is arranged so that the pair of engaging members can be connected in a staggered manner.

  According to this configuration, when the string is stretched between the pair of engaging members, the pair of engaging members can be brought close by simply applying a tensile force to the string. The provided second loop rows can be engaged with each other.

  Another aspect of the present invention is characterized in that, in the above configuration, the pair of first joining jig bodies includes a pair of fastener members.

  According to this configuration, the first loop row can be matched with a simple operation.

One aspect of the present invention includes a first loop row (14) provided on one side in the thickness direction of both ends in the length direction of the seam felt (2) and a second loop row ( 20) A method of joining the seam felt by passing a core wire in a state where the corresponding loop holes are aligned with each other, on the one side in the vicinity of the both ends of the seam felt A first joining jig (26) provided with a pair of first joining jig bodies (30) is attached, and a pair of engaging members is provided on the other side in the vicinity of the both ends of the seam felt. (38) and a second joining jig (28) provided with engaging means (40) for engaging with the pair of engaging members are attached, (a) the pair of joining jig main bodies By engaging each other, the seam felt The vicinity of the both ends is held close to each other so that the vicinity of the both ends forms a mountain shape toward the other side, and the one side of the both ends abuts each other . (B) passing the first core wire (22) through the first loop row, and (c) releasing the engagement between the pair of joining jig bodies. And (d) engaging the engagement means with the pair of engagement members so that the vicinity of the both end portions of the seam felt has a chevron shape toward the one side, and Holding the vicinity of both ends close to each other so that the other sides face each other, and aligning the second loop rows of the both ends with each other; (e) a second in the second loop row Step through core wire (24) , Characterized in including it and releasing the engagement of (f) said second bonding jig.

  According to this configuration, in order to align the second loop rows with each other, when the both ends of the seam felt are brought together, the alignment state of the second loop rows can be visually confirmed from the other side in the thickness direction. In addition, if there is an unmatched location, the second loop row at that location can be matched by pushing the vicinity of both ends of the seam felt or the second loop row by hand or the like. Therefore, it is possible to easily and reliably join both ends of the seam felt.

Another aspect of the present invention is characterized in that, in the above-described configuration, the engaging means includes a string .

  According to this configuration, the alignment state of the second loop rows can be visually confirmed through the space between the strings spanned between the pair of engagement members, and a hand or the like is inserted from the space, and the second Loop sequences can be matched.

  According to another aspect of the present invention, in the above configuration, the pair of engagement members include a plurality of engagement portions (44, 48) for slidably engaging the string, and the step (d) includes the step (d) Slidably engaging the string with the plurality of engaging portions so as to connect the pair of engaging members attached to the other side in the vicinity of the both ends of the seam felt in a staggered manner; And applying a tensile force to the string to hold the vicinity of both ends close to each other so that the vicinity of the both ends forms a mountain shape toward the one side.

  According to this configuration, the pair of engaging members can be brought close to each other simply by applying a tensile force to the string, whereby the second loop rows provided at both ends can be engaged with each other.

  One aspect of the present invention is a bonding jig for aligning the loop holes (18) formed in each of the pair of loop rows (20) provided at both ends in the length direction of the seam felt (2). A pair of engaging members (38) attached to one surface of the seam felt in the vicinity of the both ends, and a string (40) engaged with the pair of engaging members. It is characterized by providing.

  According to this configuration, in order to align the loop rows with each other, when both ends of the seam felt are brought together, the loop rows are connected with each other through the space between the strings spanned between the pair of engaging members. It is possible to visually check the alignment state, and insert a hand or the like from the space to align the loop rows. Therefore, it is possible to easily and reliably join both ends of the seam felt. In particular, in a seam felt in which loops are formed in two rows in the thickness direction, after aligning the loops at both ends of one row and passing the core wire, align the loops at both ends of the other row Suitable for use in.

  According to the present invention, it is possible to provide a seam felt joining structure in which both ends of a seam felt in which loops are formed in two rows in the thickness direction can be joined easily and reliably.

Schematic cross-sectional view of a seam felt according to an embodiment The perspective view of the seam felt which concerns on embodiment The perspective view in the state where the lower row side loops matched each other of the seam felt and joining jig concerning an embodiment The perspective view in the state which aligned the upper row side loops of the seam felt and joining jig concerning an embodiment mutually Schematic sectional view of the seam felt and the joining jig according to the embodiment in a state where the lower row side loops are aligned with each other. Schematic sectional view of the seam felt and the joining jig according to the embodiment in a state where the lower row side loops are aligned with each other and then the fastening of the lower row side joining jig is released. Enlarged view of the loop portion in FIG. Schematic sectional view of the seam felt and the joining jig according to the embodiment in a state where the upper loops are aligned with each other. The top view which shows the deformation | transformation form of the jig for joining of the upper row The top view which shows the other deformation | transformation form of the jig for joining of the upper row side

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the seam felt 2 is obtained by laminating and integrating a bat fiber layer 6 on first and second base fabrics 4a and 4b by needling. The seam felt 2 is endless as shown in FIG. 2, but when both ends thereof are joined, an endless annular shape is formed as shown in FIG. The seam felt 2 is attached to a paper machine and is used as a transport belt for paper raw materials in a press dewatering process.

  The seam felt 2 has a structure in which a lower first base cloth 4a (an inner base cloth in an endless annular form) and an upper second base cloth 4b (an outer base cloth in an endless annular form) are stacked. Both are connected by a bat or thread. The first base fabric 4a and the second base fabric 4b may be slightly shifted in the length direction, may have a step at the end (FIGS. 1 and 2), or may be aligned (FIGS. 3 to 7). ). The first and second base fabrics 4a and 4b are each formed as a woven fabric in which a plurality of warp yarns 8 extending in the length direction and a plurality of weft yarns (not shown) extending in the width direction are woven together. ing.

  A plurality of first loops 10 formed by folding back warps 8 are arranged at both ends in the length direction of the first base fabric 4a, and the plurality of first loops 10 are formed inside the loop shape. One loop hole 12 is arranged so as to be aligned in the width direction to form a first loop row 14. Similarly, a plurality of second loops 16 formed by folding back the warp 8 are arranged at both ends in the length direction of the second base fabric 4b, and the plurality of second loops 16 are formed inside the loop shape. The second loop holes 18 are arranged so as to be aligned in the width direction to form the second loop row 20.

  In order to make the seam felt 2 into the endless annular form shown in FIG. 1, the first loops 10 of the pair of first loop rows 14 formed at both ends are alternately overlapped, and the first loop holes 12 are formed. Both ends are abutted with each other so as to be aligned, and the first core wire 22 (see FIG. 6) is passed through the aligned first loop hole 12. Further, the second cores 24 are opposed to each other so that the second loops 16 of the pair of second loop rows 20 formed at both ends are alternately overlapped and the second loop holes 18 are aligned with each other. (See FIG. 7) is passed through the aligned second loop hole 18. The first core wire 22 and the second core wire 24 may be the same core wire or different core wires.

  Both ends of the seam felt 2 are joined to each other in a state where the seam felt 2 is drawn into a felt travel path of a paper machine (not shown). At this time, the first joining jig 26 is used to align the first loop holes 12 at both ends, and then the second joining jig is used to align the second loop holes 18 at both ends. 28 is used. The first joining jig 26 and the second joining jig 28 are sewn in the vicinity of both end portions of the seam felt 2 in advance.

  As shown in FIG. 3 (the first and second loops 10 and 16 are not shown), the first joining jig 26 includes a pair of fastener members 30 serving as main bodies thereof. Each of the pair of fastener members 30 includes a fabric portion 32 fixed to the lower side of the seam felt 2 and a fastener element portion 34 attached to the fabric portion 32. Also, a slider 36 for slidably attaching the pair of fastener element portions 34 to each other and releasing the engagement is attached to either one of the pair of fastener members 30.

  The fabric portion 32 is made of a substantially rectangular fabric, and a fastener element portion 34 is attached to one of the long sides thereof. The fabric portion 32 is disposed below the seam felt 2 so that the fastener element portion 34 faces the end portion side of the seam felt 2 and is parallel to the end portion. The vicinity of the long side of the fabric portion 32 opposite to the side where the fastener element portion 34 is attached is sewn at a position of 12 cm to 20 cm from the end of the seam felt 2, and the seam is the end of the seam felt 2. Made parallel. The length of the long side of the fabric portion 32 is larger than the width of the seam felt 2, and both ends of the long side direction of the fabric portion 32 protrude from the side sides of the seam felt 2 in the width direction in a sewn state. The fastener element portion 34 is arranged at a position slightly displaced from the end of the seam felt 2, for example, about 1 cm to 3 cm.

  As shown in FIGS. 3 and 4, the second joining jig 28 is slidably engaged with the pair of engaging members 38 fixed to the upper side of the seam felt 2 and the pair of engaging members 38. And a string 40 serving as an engaging means for holding the pair of engaging members 38 close to each other. Each of the pair of engagement members 38 includes an attachment piece 42 attached to the upper side of the seam felt 2 and a plurality of engagement pieces 46 attached to the attachment piece 42 so as to form an engagement hole 44.

  The attachment piece 42 is made of a substantially rectangular or tape-shaped fabric, and a plurality of engagement pieces 46 are attached to one of the long sides thereof at substantially equal intervals, for example, 10 cm to 30 cm intervals. The attachment piece 42 is disposed on the upper side of the seam felt 2 such that the side on which the engagement piece 46 is attached faces the end portion side of the seam felt 2 and the long side thereof is substantially parallel to the end portion. The attachment piece 42 is sewn near the end of the seam felt 2. The attachment piece 42 is the same as the sewing position of the fabric portion 32 of the first joining jig 26 or the end portion of the seam felt 2 more than that so as not to hinder the laying operation by the first joining jig 26. It is preferable that the sewing machine is sewn at a position away from the sewing machine. For example, the sewing position is 12 cm to 25 cm from the end of the seam felt 2, and is parallel to the end of the seam felt 2. When the end of the seam felt 2 is meandering, the attachment piece 42 is sewn linearly along the direction in which the meandering end extends. The length of the long side of the mounting piece 42 is substantially equal to the width of the seam felt 2, and the mounting piece 42 is aligned so that the end of the long side direction of the mounting piece 42 is aligned with the side of the seam felt 2 in the width direction. Is sewn from the upper side of the seam felt 2.

  The engagement piece 46 is made of a substantially rectangular or tape-shaped fabric, and both end portions thereof are fixed to the attachment piece 42 by sewing or the like, and an engagement hole 44 that functions as an engagement portion through which the string 40 passes is formed. ing. The engagement piece 46 may be formed of resin or metal. In this case, the engagement hole 44 may be deformed into a hook shape. In addition, instead of the engagement hole 44 formed by the engagement piece 46, the attachment piece 42 may be provided with a plurality of through holes 48, and the string 40 may be engaged. You may reinforce with the member which consists of resin or a metal (refer FIG. 9).

  Next, the joining procedure of the seam felt 2 will be described with reference to FIGS. 5 to 8 are schematic diagrams, and the batt fiber layer 6 and the like are omitted.

  Before shipping, the pair of fastener members 30 of the first joining jig 26 and the pair of engaging members 38 of the second joining jig 28 are sewn to both ends of the seam felt 2. At the site where both ends of the seam felt 2 are joined, first, the seam felt 2 is pulled into the travel path of the papermaking machine, and both ends of the seam felt 2 are connected to the pair of engaging members 38 of the second joining jig 28. Adjacently face each other with the attached side facing up.

  Next, in the first joining jig 26, the slider 36 is slid in a state of being engaged with the two fastener element portions 34, and the fastener element portions 34 are engaged with each other. Since the first joining jig 26 is fastened in the vicinity of both ends of the seam felt 2, the vicinity of both ends of the seam felt 2 can be held close to each other so that both ends of the seam felt 2 are brought together. The length from the position where the pair of fastener members 30 of the first joining jig 26 is sewn to the fastener element 34 is the end from the position where the first joining jig 26 of the seam felt 2 is sewn. Therefore, the vicinity of both end portions of the seam felt 2 forms a mountain shape in a direction away from the first joining jig 26, that is, upward. Therefore, both end surfaces of the seam felt 2 are abutted on the lower side in the thickness direction, and the lower first loop rows 14 formed at both ends mesh with each other, and the upper side in the thickness direction is slightly separated from each other. doing. At this time, the upper second loop rows 20 are slightly separated from each other in the length direction. Therefore, whether or not each of the plurality of first loops 10 in the first loop row 14 is correctly arranged so that the first loop holes 12 are aligned is visually confirmed not only from the width direction but also from above. it can. If there is the first loop 10 that is not correctly arranged, the first loop hole 12 is arranged at a correct position where the first loop hole 12 is aligned by hand or the like. Next, the first core wire 22 is passed through the aligned first loop hole 12 (FIG. 5). The first core wire 22 may be passed through while engaging the first loop 10.

  Thereafter, the slider 36 is slid in the reverse direction to release the engagement of the fastener element portion 34. The vicinity of both end portions of the seam felt 2 is made substantially flat (FIG. 6). As shown in FIG. 7, when the fastening of the first joining jig 26 is released, tension is applied to the seam felt 2 in a direction in which both ends thereof are separated (direction of a double-headed arrow in FIG. 7). Since the first core wires 22 are passed through the first loop holes 12 between the first loop rows 14 at both ends, the meshing is maintained. On the other hand, the engagement between the second loop rows 20 at both ends becomes shallow, and the portion where the second loop holes 18 are aligned becomes narrow. Accordingly, since it is difficult to pass the second core wire 24 through the second loop hole 18 in this state, it is necessary to bring the second loop rows 20 at both ends into deep engagement.

  Therefore, according to the following procedure, the second joining jig 28 is used to bring the second loop rows at both ends together. The string 40 is tied to the first engagement hole 44 on one end side of the pair of engagement members 38. Thereafter, the string 40 is alternately arranged in the engagement holes 44 of the pair of engagement members 38 and sequentially from one end side to the other end side in the width direction so that the string 40 is arranged in a staggered manner. Go through. Next, the string 40 and the engagement hole 44 are slid to each other so that the space between the pair of engagement members 38 is gradually narrowed from the side where the string 40 is connected, and the pair of engagement members 38 are brought closer to each other. At this time, both end portions of the seam felt 2 which are faced to each other cannot move upward but move downward because the string 40 exists. Therefore, the vicinity of both end portions of the seam felt 2 forms a mountain shape downward. Therefore, both end surfaces of the seam felt 2 are in a state in which the upper side is abutted. Therefore, the second loop row 20 on the upper side in the thickness direction formed at both ends overlaps each other, and the first core wire 22 is also passed through the first loop hole 12 in the first loop row 14 on the lower side in the thickness direction. Therefore, they are kept in an overlapping state. Whether or not each of the plurality of second loops 16 in the second loop row 20 is correctly arranged so that the second loop holes 18 are aligned is determined from the lower side by fastening the first joining jig 26. Although the first loop row 14 is overlapped even if it is released, it cannot be visually confirmed, but it can be seen from the width direction, and also from above, through the space 50 between the strings 40 arranged in a staggered manner. It can be confirmed visually. In particular, since it can be visually confirmed from above, it can be clearly seen which second loop 16 is not correctly arranged. If there is a second loop 16 that is not correctly arranged, the relevant part is pushed by hand or the like through the space 50 between the strings 40 arranged in a staggered manner, or pushed up from the open lower side if possible. The second loop hole 18 is disposed at a correct position where it is aligned. Next, the second core wire 24 is passed through the aligned second loop hole 18 (FIG. 8).

  Thereafter, the string 40 is loosened so that the vicinity of both ends of the seam felt 2 is in a substantially flat state. Further, the pair of fastener members 30 and the pair of engaging members 38 are sewn to the seam felt 2, and the first joining jig 26 and the second joining jig 28 are removed from the seam felt 2.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, the loop holes may be aligned using the second joining jig on both the lower side and the upper side of the seam felt. Moreover, you may change suitably the method of hooking the string of 2nd joining jig, and arrangement | positioning of an engagement hole. For example, the string is arranged so that the string is parallel to the length direction between the pair of engaging members (the string follows a U-shaped repetitive pattern and a left-right inverted U-shaped repeating pattern, or each of the plurality of strings is a pair. May be arranged so that parallel and oblique are repeated (arrangement in which the string follows a Z-shaped repetitive pattern). Further, when the second joining jig is fastened to the seam felt, a space 50 opened in the thickness direction (vertical direction) is formed between the pair of engaging members, and the second loop is visually observed from the space 50. Any shape can be used as long as the seam felt can be pushed in by hand or the like to align the second loop hole. For example, instead of a string, a rod and a slider that can be selectively fixed to the rod are used, one end of the rod is fixed to one of the pair of engaging members, and the slider is fixed to the other of the pair of engaging members. Also good. The order of sewing and removing the first joining jig and the second joining jig from the seam felt can be appropriately changed. For example, the first joining jig may be removed after passing the first core wire through the first loop hole and before butting the upper sides of both ends of the seam felt with the second joining jig (see FIG. 4), the second joining jig may be sewn after the first core wire is passed through the first loop hole by the first joining jig. Further, the release of the fastening in the vicinity of both end portions of the seam felt by the first joining jig and the second joining jig is not performed by releasing the engagement of the fastener or loosening the string, and the first joining jig and the second joining jig. Alternatively, the two joining jigs may be sewn to the seam felt. Moreover, although the both ends of the seam felt of this embodiment are orthogonal to the length direction, you may incline both ends with respect to the length direction.

2 ... seam felt, 10 ... first loop, 12 ... first loop hole, 14 ... first loop row, 16 ... second loop, 18 ... second loop hole, 20 ... second loop row, 22 ... first core wire, 24 ... second core wire, 26 ... first joining jig, 28 ... second joining jig, 30 .. ... A pair of fastener members, 32... Fabric portion, 34... Fastener element portion, 38... Pair of engagement members, 40. Hole, 46 ... engagement piece

Claims (5)

A seam felt joint structure,
A seam felt comprising a first loop row provided on one side in the thickness direction of both ends in the length direction and a second loop row provided on the other side;
A first bonding jig with the end portions of the pair of first joining jig body mounted on one side in the vicinity of the seam felt,
A pair of engagement members attached to the other side in the vicinity of the both ends of the seam felt and a second joining jig provided with engagement means for engaging with the pair of engagement members;
The first joining jig is configured to engage the pair of joining jig main bodies with each other in a state where the engaging means is not engaged with the pair of engaging members, thereby the both ends of the seam felt. It is configured so that the vicinity of both ends can be held close to each other so that the vicinity of the portion forms a mountain shape toward the other side, and the one side of the both ends abuts each other.
The second joining jig is configured to engage the engaging means with the pair of engaging members in a state where the pair of joining jig main bodies are not engaged with each other, thereby the both ends of the seam felt. It is configured so that the vicinity of both end portions can be held close to each other so that the vicinity of the portion forms a mountain shape toward the one side and the other side of the both end portions abut each other. The seam felt joint structure. The engaging means comprises a string;
The pair of engaging members includes a plurality of engaging portions that slidably engage the string,
2. The seam felt joining structure according to claim 1 , wherein the plurality of engaging portions are arranged such that the string can be connected in a staggered manner between the pair of engaging members. The seam felt joining structure according to claim 1 or 2 , wherein the pair of first joining jig bodies includes a pair of fastener members. A state in which the corresponding loop holes are aligned with each other of the first loop row provided on one side in the thickness direction of both ends in the length direction of the seam felt and the second loop row provided on the other side. In the method of joining the seam felt by passing the core wire,
A first joining jig having a pair of first joining jig bodies is attached to the one side in the vicinity of the both ends of the seam felt, and the other in the vicinity of the both ends of the seam felt. On the side, a second joining jig provided with a pair of engaging members and engaging means for engaging with the pair of engaging members is attached,
(A) By engaging the pair of joining jig main bodies with each other, the vicinity of the both ends of the seam felt forms a mountain shape toward the other side, and the one side of the both ends protrudes from each other. Holding the vicinity of the both ends close to each other, and aligning the first loop rows of the both ends with each other,
(B) passing the first core wire through the first loop row;
(C) releasing the engagement between the pair of joining jig bodies ;
(D) By engaging the engaging means with the pair of engaging members, the vicinity of the both ends of the seam felt forms a mountain shape toward the one side, and the other side of the both ends is Holding the vicinity of the both ends close to each other so as to face each other, and aligning the second loop rows of the both ends with each other;
(E) passing a second core wire through the second loop row;
(F) the method of the said including that the step of releasing the engagement of the second bonding jig. The engaging means comprises a string;
The pair of engaging members includes a plurality of engaging portions that slidably engage the string,
The step (d)
A step of slidably engaging the string with the plurality of engaging portions so that the pair of engaging members attached to the other side in the vicinity of the both end portions of the seam felt are connected in a staggered manner. When,
The method of claim 4 , further comprising the step of holding the vicinity of both ends close to each other so that the vicinity of the both ends forms a mountain shape toward the one side by applying a tensile force to the string. the method of.

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