JP4587065B2 - Elastic warp knitted fabric for cushion body tension - Google Patents

Description

  The present invention relates to an elastic sheet 16 that is used to construct a cushion surface 12 of a cushion body 11 by being stretched between two facing frame members 13 and 13.

The present applicant has filed a patent application for an elastic fabric using heat-shrinkable elastic yarn as an elastic sheet used for the cushion body (see, for example, Patent Document 1). The elastic fabric according to the patent application includes a double woven bag and a plain woven fabric, and the double woven bag has a bag shape. A cushion frame 19 is inserted into the cavity and is heat-shrinked so that it is tensioned between the two frame members 13 and 13 of the frame 19. The left and right edges 18 facing each other in the length direction Q of the yarn are folded back to sew the bag-like cavity 20, and the frame member 13 is inserted into the bag-like cavity 20 and attached to the frame 19 of the cushion body, and the frame is thermally contracted. Tension is applied between the two frame members 13 and 13 of 19.
JP 2001-333839 A (Claims 0010, 0020, FIGS. 1 and 2)

The frame member 13 inserted into the bag-like cavity 20 that is folded and sewn at the end edge 18 can be connected to the frame 19 by a joining member 21 such as a hook. In that case, a hole or a cut for inserting the joining member 21 is formed. The bag-like cavity 20 is provided so as to jump in the length direction of the edge 18.
As the elastic yarn, a heat-fusible core-sheath composite yarn having a sheath component as a heat-fusible polymer is also used, and the warp and the weft are bonded via the heat-fusible polymer. There is no misalignment between them, and the pressing load applied to the cushion surface 12 during use is evenly distributed in all directions of the elastic fabric 16.

  Elastic yarn is not used for warp, but exclusively for weft. This is because even if an elastic yarn is used for warp, the warp (elastic yarn) expands and contracts during the weaving process, the warp tension is not constant, and the weft density (weft driving density) varies greatly, resulting in a high quality. A stable elastic fabric cannot be obtained. In addition, the elastic yarn is less slippery than other fiber yarns, does not pass smoothly through the reeds and wings, and the reed that rubs against the warp (elastic yarn) is easily bent, and the warp (elastic yarn) is also Easily damaged by rubbing against wings and wings.

  Generally, the vertical and horizontal dimensions of the cushion surface of the cushion body are generally 50 cm or less. For this reason, in order to weave the prior-application elastic fabric in a bag shape, a loom having a small width of 50 cm or less corresponding to the dimension of the cushion surface 12 is required. However, although the narrow loom is used in the field of Japanese garments and handicraft fabrics, it is not widely used in general, and its weaving efficiency is significantly lower than that of the widely used loom. For this reason, the elastic fabric is woven by a wide loom having a weaving width of 1 m or more, cut according to the size of the cushion surface, and the left and right end edges 18 facing in the length direction Q of the elastic yarn (weft) are folded back and stitched. Then, the frame material 13 is inserted into the bag-like cavity 20 formed at the end edge 18 and used.

  When the elastic yarn (weft 14) is bent and deformed as if embossed by being pressed against the warp 15 at the connection point of the elastic fabric, the elastic yarn is bent by the initial load acting on the cushion surface 12 during use. The cushion surface 12 sinks greatly until it is tensioned from the state until it becomes a straight state, and then a reaction force against the pressing load acting on the cushion surface 12 acts from the elastic yarn 14. The initial sinking of the cushion surface until the elastic yarn (weft 14) is in a straight state gives an unpleasant feeling as if it had fallen into the depression of the cushion surface.

  In order to eliminate such discomfort, multifilament yarns and spun yarns that are easy to bend are used for the warp yarns 15, and thick monofilament elastic yarns that are difficult to bend are used for the elastic yarns (weft yarns 14). When a monofilament yarn is used for the warp 15, a monofilament elastic yarn thicker than the warp 15 is used for the weft 14. For this reason, the conventional elastic fabric 16 is easy to fold in the length direction R of the warp 15 like a cocoon, and difficult to fold in the length direction Q of the weft 14, and is a bag for inserting the frame material 13 into the end edge 18. It takes time to sew the hollow cavity 20.

  Further, when the conventional elastic fabric 16 is used for a long time as the cushion surface 12 of the cushion body, the elastic yarn (weft 14) is woven straight without bending, so that the pressing load acting on the cushion surface is The elastic yarn (weft yarn 14) becomes a tensile load pulled in the length direction Q and acts repeatedly between the warp yarn 15 outside the bag-like cavity and the frame member 13. For this reason, the outer warp 15 is gradually pushed out to the end edge 18 by the frame member 13 and finally unwound from the end 17 of the elastic yarn (weft). Inconvenience that it will come off from the hollow 20 will occur. In other words, in other words, the end 17 of the elastic yarn (weft) is pulled out from the warp yarn (15) so as to be caught by the frame member 13.

  Accordingly, an object of the present invention is to obtain a durable cushion body by preventing the yarn from unraveling from the end edge 18 of the elastic sheet 16 to which the frame member 13 is attached. Another object of the present invention is to obtain an elastic sheet 16 that does not require time for the preparation work to be stretched on the frame 19 of the cushion body.

The elastic warp knitted fabric for cushion body tension according to the present invention includes: (a) a space between the chain stitch row 23 and the chain stitch row 23 formed by the adjacent warp yarns 22 and 22 in the course direction and continuing in the wale direction (W). In the warp knitted fabric that is connected and knitted with the insertion yarn 24,
(B) Double knitted portions 25 and 26 in which the warp knitted fabric is divided into a front and a back are formed at a required interval in the course direction (C), and between the separated front and back A bag-like cavity is formed following the wale direction (W),
(C) In the course direction (C), the warp knitted fabric is formed by the double knitting portions 25 and 26 forming the bag-like cavity, and the left and right ear knitting portions 27 and 28 in the course direction (C) Are divided into a body knitting portion 29 between the ear knitting portion 27 and the ear knitting portion 28 ,
(D) The width L in the course direction of the warp knitted fabric of the main body knitted portion 29 is 20 to 70 cm,
(E) The insertion yarn 24 connecting the chain stitch row 23 and the chain stitch row 23 adjacent in the course direction of the main body knitting portion 29 is an elastic yarn,
(F) The left and right ear knitting portions 27 and 28 of the main body knitting portion 29 are knitted by connecting three or more adjacent chain stitch rows 31, 32 and 33 with insertion yarns 34,
(G) The first feature is that any one of the warp yarns 41, 42, 43 forming the chain stitch rows 31, 32, 33 of the ear knitting portions 27, 28 is a heat-fusible yarn .

The second feature of the elastic warp knitted fabric for cushion body tension according to the present invention is that, in addition to the first feature, (h) the chain stitch formed by the adjacent warps in the course direction C is in the wale direction W. In the warp knitted fabric formed continuously by connecting between adjacent chain stitch rows and chain stitch rows with an insertion thread,
(I) Double knitting in which the warp knitted fabric is divided into a front and a back with a predetermined interval in the course direction (C) of the left and right end portions 51 and 53 in the course direction C and the intermediate portion 52 therebetween Part is formed , and a bag-like cavity following the wale direction W is formed between the outer and lining of each divided double knitted part ,
(J) The warp knitted fabric is partitioned in the course direction C by the bag-shaped cavity,
(K) The bag-like cavities that partition the warp knitted fabric in the intermediate portion 52 are two sets of one,
(L) Between the two bag-like cavities 25 and the bag-like cavities 26 forming one set in the intermediate portion 52, six or more chain stitch rows 31, 32, and 33 connected by the insertion thread 34 are interposed. Constitutes a belt-like boundary 30;
(M) The warp knitted fabric is separated in the course direction (C ) at the belt-like boundary portion 30 and the left and right ear knitting portions ( 27, 28) and a main body knitting portion 29 between the left and right ear knitting portions 27 and the ear knitting portion 28 .

The third feature of the elastic warp knitted fabric for cushion body tension according to the present invention includes, in addition to the second feature described above , six or more chain stitch rows 31, 32, 33,. The insertion yarn 35 that connects two adjacent chain stitch rows (33) in the middle part of the array is easier to break than the insertion yarns 24 and 34 that connect between the other chain stitch rows. The point is that it is a yarn.

  The edge 18 of the elastic warp knitted fabric for laying the cushion body of the present invention is knitted by connecting three or more adjacent chain stitch rows 31, 32, 33 with insertion yarns 34, 35. Since the rows 31, 32 and 33 and the insertion yarns 34 and 35 are caught in the course direction C and they are continuous in the wale direction, they are not released from the edge 18, and the durable cushion body 11 is formed. can get. Since the bag-like cavities 25 and 26 continuing in the wale direction W are knitted on the edge 18 as a part of the elastic warp knitted fabric 40, the edge 18 (the ear knitting portions 27 and 28) is folded back to form a bag-like cavity. Therefore, the cushion body 11 can be obtained efficiently.

  In the elastic warp knitted fabric 40 for laying the cushion body of the present invention, the chain stitch rows 31, 32, 33 of the ear knitting portions 27, 28 constituting the end edge 18 are constituted by heat-fusible yarns, and elastic warp When the knitted fabric 40 is heated, the chain stitch rows 31, 32, and 33 are fused to finish the end edge 18 hard, and the end edge 18 (the ear knitting portions 27 and 28) that are finished to the bag-like cavities 25 and 26 are formed. Therefore, the insertion work of the frame member 13 into the bag-like cavities 25 and 26 is facilitated, and the automation of the insertion work is facilitated. Also in this respect, the production efficiency of the cushion body 11 is increased.

  According to the present invention, a plurality of elastic warp knitted fabrics 40, 40, 40,..., In which bag-like cavities 25, 26 into which the frame member 13 is inserted are knitted on the left and right edges are knitted parallel to the wale direction W. The left and right elastic warp knitted fabrics 40, 40 are cut at the belt-like boundary portion 30 and attached to the frame 19 of the cushion body 11. The belt-like boundary portion 30 as the cut portion is connected to the chain stitch row 31. 32.33... Are connected and knitted by insertion yarns 34, 35, and the chain stitch rows 31, 32, 33,. The chain stitch rows 31, 32, 33... That are locked to the chain stitch rows 31, 32, 33... Locked to the chain stitch rows 31, 32, 33 ... Become bets, the cutting opening (edge 18) without begins to fray, the preparation of the elastic warp knitted fabric 40 for attachment to the frame 19 of the cushion body 11 efficiently performed is possible.

  In addition, the insertion yarn 35 connecting two adjacent chain stitch rows (33) in the middle portion of the array of the six or more chain stitch rows 31, 32, 33,... In the case of using a low-strength breakable yarn that is easier to break than the insertion yarns 24, 34 connecting the chain stitch rows, a plurality of elastic warp knitted fabrics 40, 40, 40. ... is pulled in the course direction C by pulling a warp knitted fabric knitted parallel to the wale direction W to break the breakable yarn (35), and a plurality of elastic warp knitted fabrics 40, 40, 40 ... In particular, in the case where the breakable yarn is made of water-soluble fiber (vinylon), a plurality of elastic warp knitted fabrics 40, 40 for tensioning a cushion body are obtained simply by humidifying the belt-like boundary portion 30.・ Because it can be separated into 40 ......... Efficiency of preparation of the elastic warp knitted fabric 40 for attachment to the frame 19 of the ® down member 11 is further improved.

As the warp knitting machine, a double raschel warp knitting machine is used. In the double knitting sections 25 and 26, the outer fabric is knitted with the front needle and the lining is knitted with the back needle, while the double knitting section (25 and 26). Chain yarns (not shown) are knitted at the boundary between the knitting portion and the ear knitting portion (27, 28) and between the double knitting portion (25, 26) and the main body knitting portion 29. While knitting the chain stitch with the warp 23 and the connecting yarn, the connecting yarn is reciprocated between the chain stitch row on the outer fabric and the chain stitch row on the lining, and the right and left edges of the outer fabric and the lining are bound together by the connecting yarn. A bag-like cavity 25, 26 (20) is formed between the outer material and the outer material.
In the case of using a double raschel warp knitting machine, the main body knitting portion 29 and the ear knitting portions 27 and 28 may be a double warp knitted fabric in which the outer fabric and the lining are connected by a connecting yarn.

  The insertion yarn 24 (elastic yarn) that connects the chain stitch rows (23, 23) of the main body knitting portion 27 between the ear knitting portion 27 and the ear knitting portion 28, which become the cushion surface 12 of the cushion body, has a break elongation. The degree of elasticity is 60% or more and the elastic recovery after 15% elongation is 90% or more of a non-flat cross-sectional shape monofilamate elastic yarn, for example, a polyether ester, which is lower than the core component polymer. A heat-fusible core-sheath composite polyether ester elastic yarn (500 dtex-1f, Toyobo Co., Ltd., product name: Diaflora) having a melting point heat-fusible polymer as a sheath component polymer may be used. The wale density of the elastic warp knitted fabric is preferably set so that the stress F (unit: N / 5 cm) at the time of 10% elongation of the main body knitted portion 29 in the course direction C is 150 ≦ F ≦ 600.

  The heat-fusible yarn is only for the warp yarns constituting a part of the chain stitch rows 31, 32, 33,... Constituting the ear knitting portions 27, 28 (band-like boundary portion 30). May be used. The heat-fusible yarn uses spun yarns and multifilament yarns that become a number of core-sheath composite fibers with a heat-fusible polymer as the sheath component and a high-melting point non-heat-fusible polymer as the sheath component. Good. The heat-fusible yarn may be a blended yarn or a blended yarn of a heat-fusible fiber and a non-heat-fusible fiber.

  A breakable yarn (insert yarn 35) that connects two adjacent chain stitch rows (33) in the middle portion of the array of six or more chain stitch rows 31, 32, 33,... ) In addition to using water-soluble fibers (vinylon), it is recommended to use cellulosic fibers such as acetate fibers and rayon, but the same as the insertion yarns 24 and 34 connecting the other chain stitch rows When using the raw material yarn, the fineness of the breakable yarn (insert yarn 35) is made thinner than the insert yarns 24, 34 connecting the other chain stitch rows. The width L of the main body knitted portion 29 is set according to the size of the cushion surface 12. The widths of the double knitted portions 25 and 26 are set according to the thickness of the frame member 13 to be inserted into the bag-like cavity 20 constituting the double knitted portions 25 and 26.

It is a perspective view of the elastic warp knitted fabric for cushion body tension concerning the present invention. It is a principal part enlarged surface view of the elastic warp knitted fabric for cushion body tension which concerns on this invention. It is a back surface perspective view of the cushion body which stretched the conventional elastic sheet, and is enlarging and enclosing a part in a circle.

Explanation of symbols

11: Cushion body 12: Cushion surface 13: Frame material 14: Elastic yarn (weft)
15: Warp 16: Elastic fabric (elastic sheet)
17: End of elastic yarn (weft) 18: Edge 19: Frame 20: Bag-shaped cavity 21: Joining member 22: Warp thread 23: Chain stitch row 24: Insert yarn 25/26: Double knitted portion (bag-shaped cavity) )
27, 28: Ear knitting part 29: Main body knitting part 30: Boundary part 31, 32, 33: Chain stitch row 34, 35: Insertion thread 40: Elastic warp knitted fabric 41, 42, 43: Warp thread 51: End part 52: Intermediate part 53: End part C: Course direction Q: Length direction of elastic yarn (weft) R: Length direction of warp W: Wale direction

Claims (3)

(A) The adjacent warp yarns (22, 22) in the course direction are formed and the chain stitch row (23) and the chain stitch row (23) following the wale direction (W) are connected by the insertion yarn (24). In the knitted warp knitted fabric,
(B) Double knitted portions (25, 26) in which the warp knitted fabric is divided into a front and a back are formed with a predetermined interval in the course direction (C), and the separated front and back A bag-like cavity that follows the wale direction (W) is formed between
(C) In the course direction (C), the warp knitted fabric forms a bag-like cavity, and the left and right ear knitting parts (27, 28) in the course direction (C) are formed by the double knitting parts (25, 26). And the main body knitting part (29) between the left and right ear knitting parts (27) and the ear knitting part (28),
(D) The width L in the course direction of the warp knitted fabric of the main body knitted portion (29) is 20 to 70 cm,
(E) The insertion yarn (24) connecting between the chain stitch row (23) and the chain stitch row (23) adjacent in the course direction of the main body knitting portion (29) is an elastic yarn,
(F) The left and right ear knitting parts (27, 28) of the main body knitting part (29) are connected to each other by three or more adjacent chain stitch rows (31, 32, 33) with insertion threads (34). Is organized,
(G) Cushion body tension in which any one of the warp yarns (41, 42, 43) forming the chain stitch row (31, 32, 33) of the ear knitting portion (27, 28) is a heat-fusible yarn Elastic warp knitted fabric for installation. (H) The chain stitches formed by the adjacent warp yarns in the course direction (C) are continuously formed in the wale direction (W), and the adjacent chain stitch rows and the chain stitch rows are knitted by connecting them with insertion yarns. In the warp knitted fabric
(I) The warp knitted fabric is front and back with a required interval in the course direction (C) of the left and right end portions (51, 53) in the course direction (C) and the intermediate portion (52) between them. A double knitted portion is formed, and a bag-like cavity following the wale direction (W) is formed between the outer and lining of each divided double knitted portion,
(J) The warp knitted fabric is partitioned in the course direction (C) by the bag-shaped cavity,
(K) The bag-like cavities that partition the warp knitted fabric in the middle part (52) are two sets of one,
(L) Six or more rows of chain stitches connected between the two bag-like cavities (25) and the bag-like cavities (26) forming one set at the intermediate portion (52) by the insertion yarn (34) (31, 32, 33) constitutes a belt-like boundary portion (30) intervening,
(M) The warp knitted fabric is cut off in the course direction (C) at the belt-like boundary part (30), and the double knitted parts (25, 26) forming a bag-like cavity are used in the course direction (C). The left and right ear knitting portions (27, 28) and the main body knitting portion (29) between the left and right ear knitting portions (27) and the ear knitting portion (28) according to claim 1, Elastic warp knitted fabric for cushion body tension. An insertion thread (35) for connecting two adjacent chain stitch rows (33) in the middle part of the array of six or more chain stitch rows (31, 32, 33...) Of the belt-like boundary portion (30). 3) The elastic warp knitted fabric for tensioning the cushion body according to claim 2 , which is a low-strength breakable yarn that is easier to break than the insertion yarns (24, 34) connecting the other chain stitch rows .

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