JP4841190B2 - Jade core material - Google Patents

Description

  The present invention includes a ball portion and a belt plate portion molded from a synthetic resin material, and a hook portion is integrally formed on at least one of the ball portion and the belt plate portion, and a skin sheet material such as a seat. It is related with the bead core material attached to an edge at the required part.

  Conventionally, an edge core material has been added to the inner surface of a seat sheet for a vehicle, or a ridge line portion of a sofa or a seating chair for office or home use to give a high-class feeling to a seat cushion or the like. Things have been done. For this ball edge core material, a string having high rigidity obtained from a fiber material has been used in the past. In recent years, a synthetic resin ball core material has come to be used in many cases instead of these strings. The synthetic resin ball edge core material includes a ball portion made of a long wire having a circular cross section, and a rectangular cross-section band plate portion that is integrally formed simultaneously with the ball portion along the longitudinal direction of the ball portion. have.

  In order to attach the synthetic resin bead core material having such a structure to the ridge line portion of the seat sheets, the first and second skin sheet materials are polymerized with their side edges on the sewing side superposed on each other. A ball core material is attached to the back side of the side edge portion of the outer skin sheet material of No. 2, and the ball portion and the belt plate portion are overlapped with the first and second skin sheet materials and the belt core portion of the ball edge core material. And the second skin sheet material is folded back so as to wrap the ball portion of the edge core material, thereby forming a step portion between the first and second skin sheet materials. Here, the normal seat cover is made slightly smaller than the outer dimensions of the cushion so as not to cause wrinkles or slack in the seat pad. For this reason, when the seat cover is covered with the seat pad, a tensile force acts on the sewing location due to the repulsive force of the pad material, and the ball portion of the edge core material is lifted away from the surface of the first skin sheet material. As a result, this tendency becomes more prominent when the stepped portion of the seat cover is unstablely meandered or when the seating pressure of the seated person is applied, and the ball core material and the first and second skin sheet materials are sewn together. The exposed portion is exposed and the sheet appearance quality is deteriorated.

In order to solve such a problem, for example, in Japanese Patent Application Laid-Open No. 2005-40158 (Patent Document 1), an edge core material is attached to a side edge portion of the polymerized first and second skin sheets. Attached along the back side edge, stitches the belt plate portion of the ball edge core material and the overlapped portion of the first and second skin sheet materials along the first stitch line, The first and second skin sheet materials are stitched along the second stitching line in the vicinity of the end opposite to the plate portion. By stitching along this second stitching line, the ball portion of the edge core material is prevented from floating from the surface of the first skin sheet material. Further, according to Patent Document 1, a plurality of hook pieces are provided on one side of a synthetic resin ball core material, and the hook pieces formed on the ball core material on the back surface of the folded portion of the second skin sheet material. Are engaged so that the folded portion of the second skin sheet material does not float.
JP 2005-40158 A

  By the way, in general, a ridge line portion of a vehicle seat or the like is not limited to a straight line, and often has a shape that is curved so as to be twisted in the length direction. Therefore, after the bead core material is attached along the curved edge portion of the skin sheet material, the bead core material is rigid even if the seat cover is adapted to cover the curved ridge line portion of the seat pad. In some cases, even if it is curved by twisting to match the curved ridgeline of the seat pad, the ball core will return to the original straight line, and the seat cover will be adapted to the ridgeline of the seat pad. I can't do that.

  According to the said patent document 1, it describes that synthetic resin materials, such as a polypropylene, are used as a molding material of a bead core material. Examples of the synthetic resin material applied to the ball edge core material include polyamide and polyester in addition to polypropylene. However, the hardness of these synthetic resin materials is 100 or more in Rockwell hardness, which is higher than the Rockwell hardness of 90 to 100 of polypropylene listed in Patent Document 1. Thus, even if the polypropylene has a relatively low hardness compared to other thermoplastic resin materials, it is considerably hard and poor in flexibility. Therefore, when such a synthetic resin material is used, when the seat cover is covered on the seat cushions as described above, there are many cases where the ball edge portion cannot follow the shape of the seat pad well. For this reason, further ingenuity is required in order to make the ball edge part fit along the complicated appearance of the seat pad.

  Further, as described in Patent Document 1, a hook piece is formed on the surface of the band plate portion of the edge core material, and the hook piece is engaged with the back surface of the folded portion of the second skin sheet material of the cushion cover. When wearing, the seat sheets are subjected to stress from multiple directions in addition to the large seat pressure, so the engagement strength between the hook piece and the back surface of the second skin sheet material must be increased. . However, the engagement strength of the hook piece is greatly influenced by the shape and hardness of the hook piece itself and the structure of the rear surface engaging / disengaging surface of the second skin sheet material of the counterpart. Usually, as described in Patent Document 1, the skin sheet material is a skin layer made of woven or knitted fabric, genuine leather, synthetic leather, a cushion layer made of a thin urethane material, and a back made of knitted fabric or nonwoven fabric. It is obtained by polymerizing and integrating the base fabrics by laminating or the like.

  Therefore, the back surface of the skin sheet material is different from a female engaging member in which piles having an appropriate shape that can be easily engaged with hook pieces used in a normal surface fastener are dense, and the pile has a sufficient height. In addition, the pile shape is often not uniform. Therefore, a hook piece having a normal hook piece structure and hardness is difficult to reliably engage with the back surface of the skin sheet material. Even if engaged, the ratio of the number of hook pieces to be engaged is small, so that the overall engagement strength is low, and when a strong force is applied, the hook pieces are easily detached. Therefore, it is necessary to make the hardness of the hook piece higher than the hardness of the normal hook piece. However, if the hardness of the hook piece is too high, it is possible to increase the engagement strength, but it becomes difficult to bend the ball part and the band plate part made of the homogeneous material, and the above-described problems occur.

  The present invention has been made to meet the contradicting requirements of the ease of bending of the rim core material and the ease of engagement of the hook portion, and specifically, the ease of bending of the ball portion and the band plate portion. It is intended to provide a synthetic resin bead core material in which the hook portion is provided with a required engagement strength.

The object is to provide a ball portion and a belt plate portion molded from the synthetic resin material, which is the basic structure of the present invention, and to integrate the hook portion having a number of hook pieces over the entire area of one surface of the ball portion and the belt plate portion. comprising a a, a beaded core material is additionally provided to the required site of the skin sheet material of the seat or the like, said hooks are formed on the same plane, the hardness of the hook portion is the ball portion and the band made is set higher than the hardness of the plate portion, it is effectively achieved by beaded core, characterized in that.

  Preferably, the ball portion and the band plate portion are made of an elastomer resin, and the hook portion is made of a thermoplastic resin. The hook portion may be provided continuously or intermittently over the entire surface of at least one of the ball portion and the belt plate portion. The hook portion includes a case where the hook portion is composed of a large number of hook pieces, and each hook piece is erected directly on at least one surface of the ball portion and the band plate portion. Furthermore, it is desirable that the surface of the hook portion on which the hook piece is formed is a flat surface. Moreover, the sewing area | region of the said ball edge core material can be formed more flexibly than another part, and you may exclude a hook piece from the sewing area | region of the said hook part which sews the said skin sheet material. Furthermore, it is preferable that the band plate portion is not an ordinary long rectangular flat plate, but a portion opposite to the ball portion is cut out in a zigzag shape.

Effect

  It is possible to set the hardness of the hook part to the required hardness that can ensure the required engagement strength, and to easily curve the hardness of the ball part and the belt part of the edge core material along the outer shape of the cushion material By setting the hardness lower than the hardness of the hook portion to be able to easily and reliably cover the edge core material sewn on the seat cover along the outer shape of the ridge line portion of the seat pad, Engagement with the back surface of the second skin sheet material by the hook piece in the folded portion folded back so as to wrap the edge core material of the second skin sheet material inside is ensured and strong.

If the ball part and the band plate part are made of an elastomer resin and the hook part is made of a thermoplastic resin, the hardness of the hook part can be set higher than the hardness of the ball part and the belt plate part in terms of material. Further, if the surface of the hook portion on which the hook piece is formed is a flat surface, this flat surface can be used as a reference surface for forming the hook piece. By providing the hook part continuously or intermittently over the entire surface of at least one of the ball part and the band plate part, the magnitude of the engagement strength of the hook piece and the bendability of the ball part and the band plate part can be increased. Can be adjusted. Here, when one side of the band plate portion of the edge core material is cut out in a zigzag shape, the edge core material itself is more easily curved. In addition, it is preferable to eliminate the hook piece from the sewing region where the skin sheet material of the hook portion is sewn, because sewing by the sewing machine becomes easy. Furthermore, for example, each hook piece is erected directly on at least one side of the ball part and the band plate part, or the hook part itself composed of a flat substrate and a hook piece is excluded from the sewing area, In the case where the thickness of the flat base material in the sewing area of the hook portion is reduced and the sewing area is formed more flexibly than other parts, not only the sewing is facilitated, but also in the sewing part. This is preferable because the familiarity between the band plate portion and the second skin sheet material is improved.

Hereinafter, typical embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a partial perspective view of an edge core material showing a first embodiment of the present invention. As shown in the figure, the bead core 10 according to this embodiment includes a core body in which a ball portion 11 having a substantially semicircular cross section and a rectangular strip member 12 having a substantially elongated cross section are molded and integrated. 13 and a hook portion 14 formed and integrated by two-color molding on the entire continuous surface of the ball portion 11 and the belt plate portion 12.

  The entire one surface of the core body 13 with which the hook portion 14 is integrated is the same flat surface. The hook portion 14 includes a flat substrate 15 and a large number of hook pieces 16 erected on the surface of the flat substrate 15 opposite to the core body 13. Moreover, the part of the hook part 14 integrated with the band plate part 12 and the band plate part 12 of the core body 13 is cut out in a zigzag shape composed of peaks and valleys. The bead core 10 having such a configuration intermittently feeds a long core body 13 previously formed by extrusion molding into a lower core body passage (not shown) of an injection molding machine, on one side thereof. The flat base material 15 and the hook piece 16 of the hook part 14 are continuously manufactured by injection molding and integration. In the present embodiment, as described above, the band plate portion 12 and the hook portion 14 integrated with the band plate portion 12 are notched in a partial zigzag shape, but the notch shape is formed as described above. A portion corresponding to the strip plate portion 12 is formed by punching with a punch or the like. Due to this punching shape, the overall curvature of the edge core 10 is improved. Of course, the band plate portion 12 may be a normal elongated rectangular flat plate shape.

  An important point in this embodiment is that the material used for the core body 13 and the material used for the hook portion 14 are different. In the present embodiment, a polyolefin-based elastomer resin is used for the core body 13 and polypropylene is used for the hook portion 14 as in the conventional case. The softness of this polyester-based elastomer resin is about 70 from durometer A to 60 from durometer D, and is harder than general rubber, but is softer than ordinary thermoplastic synthetic resins and easily deforms. On the other hand, the hardness of polypropylene used for the hook portion is 80 to 100 in terms of Rockwell hardness, and can be easily engaged with the seat cover, particularly the skin layer 19c. The flexural modulus of the polypropylene is preferably 1500 MPa, and has appropriate hardness and flexural elasticity. Here, the thermoplastic elastomer resin is not limited to the polyester type, and various styrene-butadiene type, polyolefin type, polyvinyl chloride type, and polyamide type elastomers are also taken into consideration with respect to the affinity with the other hook part 14. Resin can be used.

FIG. 2 is a conceptual diagram when the seat cover sewn with the edge core material 10 according to the present embodiment having the above-described configuration is assembled to a seat pad such as a seat seat, and FIG. 3 is an assembly of the seat cover. It is sectional drawing of the bead core material attachment part of the seat sheet.
In order to attach the synthetic resin bead core material 10 according to the present embodiment along the ridge line portion 17 a of the seat sheet 17 shown in FIG. 3, first, the bead core material is provided at a predetermined portion of the seat cover 18. 10 is sewn. The sewing line at this time is not only a straight line at the ridge line portion of the seats, but is often bent by twisting as shown in FIG. When the material 10 is sewn, it is rarely sewn linearly and is often sewn to the seat cover 18 by twisting in addition to the large and small curves.

  This type of seat cover 18 includes a ball core material 10 and first and second skin sheet materials 19 and 20. Conventional skin sheet materials include, for example, fiber knitted fabric, natural leather, synthetic leather, etc. for the skin layer, thin soft urethane foam for the intermediate layer, and coarse and thin warp knitted fabric using thin yarn for the back base fabric. These are laminated and integrated by laminating or the like. In the present embodiment, as shown in FIG. 4, the first and second skin sheet materials 19 and 20 are provided with skin layers 19a and 20a and intermediate layers 19b and 20b having the same material and structure as conventional ones. However, a large number of piles are positively formed on one surface of the back base fabrics 19c and 20c, and the engagement rate with the hook pieces 16 is increased. The pile yarn at this time is composed of many thin filaments. The first and second skin sheet materials 19 and 20 may be the same material and structure, or may be different materials and structures. Of course, the back surface base fabrics 19c and 20c are not limited to warp knitted fabrics, and may be woven fabrics.

  As shown in FIG. 3, in order to fabricate the seat cover 18 by sewing the edge core material 10, the first and second skin sheet materials 19 and 20 are connected to the side edges on the stitching side as in the conventional case. And the hook portion 14 of the ball core material 10 along the side edge portion that curves so as to twist the back surface base fabric of the second skin sheet material 20. While applying the opposite surface, the first and second skin sheet materials 19 and 20 and the first sewn line along the boundary line between the ball portion 11 and the belt plate portion 12 of the ball edge core material 10 are first. The sewing thread 22 is used for sewing. Next, the first and second skin sheet materials 19 and 20 are sewn with the second sewing thread 23 on the second sewing line along the tip edge of the ball portion 11 opposite to the band plate portion 12. When this stitching is finished, the second skin sheet material 20 is folded back so as to wrap around the ball portion 11 of the bead core material 10, and the bead core sewn along the side edge portion of the second skin sheet material 20 is used. The hook piece 16 of the material 10 is engaged with the pile surface of the inner surface of the folded portion of the second skin sheet material 20 to complete the seat cover 18.

  By the way, when the bead core material 10 is stitched to the first and second skin sheet materials 19 and 20, if the bead core material is as described in Patent Document 1, all of the concentric materials are used. Since it is molded from a synthetic resin material such as polypropylene, the sewing needle is easily broken along the boundary line between the ball portion and the belt plate portion, but the core material comprising the ball portion 11 and the belt plate portion 12 as in the present invention. In order to make the hardness of the main body 13 lower than the hardness of the hook portion 14, a soft and easily deformable elastomer resin is used for the core material main body 13, and a normal synthetic resin such as polypropylene having a high hardness is used for the hook portion 14. Since the flat plate-like base material 15 of the hook portion 14 is integrated with the core body 13 as described above, its strength is increased, and as shown in FIG. 1 and FIG. Even if the wall thickness of 15 is reduced as much as possible, the necessary strength is secured to the hook portion 14 and at the same time, the needle of the sewing machine can be easily pierced and the sewing machine needle is not broken.

  As shown in FIGS. 2 and 3, the completed seat cover 18 is assembled so as to cover the seat pad 21 such as a seat seat as in the conventional case. At the time of this assembly, if the ball core material described in Patent Document 1, since all of the same core material uses a thermoplastic synthetic resin such as polypropylene having high hardness, the armrest portion 21a of the seat pad 21 and The bead core material arranged along the lower inner side of the ridge part 21c that curves and bulges outwardly between the side wall part 21b and twists toward the rear is highly repulsive, and has an original linear shape. In the region where the seat cover 18 that is sewn in conformity with the shape of the ridge line portion 21c is twisted, the seat cover 18 is squeezed outward to give a different appearance from the desired appearance of the seat pad. It tends to be a poor finish.

  On the other hand, according to the bead core material 10 according to the present embodiment, as described above, the core body 13 is made of a flexible and easily deformable elastomer resin, and a hook that requires a required engagement strength is required. Since a normal thermoplastic resin having a required hardness is used for the portion 14, the overall bend core material 10 has excellent bendability, and the seat cover 18 sewn with the same core material 10 is used as a seat pad. When covering and assembling in accordance with the shape of the ridge line portion 21c of 21, it is possible to easily adapt to the shape, and a step having the expected shape can be obtained in the seat cover after covering, and the appearance Extremely good seats can be obtained. Further, since the hook pieces 16 of the hook portion 14 have the required hardness and elasticity, the large number of hook pieces 16 of the hook portion 14 are securely and firmly engaged with the pile on the back surface of the second skin sheet material 20. Match. As a result, even if forces from various directions are applied to the seat sheets, the inner surfaces of the second skin sheet material 20 are in the folded portion that is wrapped and wrapped around the core material 10 of the second skin sheet material 20. There is no separation, and the shape of the ball edge does not collapse or shift.

  FIG. 5 is a partial perspective view of a bead core material according to a second embodiment of the present invention. Portions that are substantially the same as those in the first embodiment are given the same reference numerals, and description of those portions will be left to the first embodiment. In this embodiment, the flat plate-like base material 15 is not continuously formed at the time of forming the hook portion 14, and a portion is dropped at a predetermined interval in the length direction of the ball edge core material 10, 11 and a part of the joint surface of the band plate portion 12 with the hook portion 14 are directly exposed to the outside to form the groove portion 10a. By forming the groove 10a, the entire edge core 10 is more easily curved.

  FIG. 6 shows a cross section of a bead core material according to a third embodiment of the present invention. Even in this embodiment, only the parts that are substantially different from the first and second embodiments will be described, and the same reference numerals are given to the parts that are substantially the same as those of the previous embodiment, and the specific description thereof will be given. Will be transferred to the first and second embodiments. According to the third embodiment, the flat base material 15 of the hook portion 14 in the above-described embodiment is eliminated, and the hook piece 16 having a high hardness is softened and softly made of an elastomer resin and has one side of the core body 13 that is excellent in curvature. It stands up directly. As a result, after ensuring the engagement strength by the hook piece 16, the entire bead core member 10 is more flexible and easier to bend than the second embodiment.

  FIG. 7 shows a fourth embodiment of the present invention. Even in this embodiment, the same reference numerals are given to the portions that are substantially the same as those in the first to third embodiments, and the specific description thereof is left to each embodiment described. In the fourth embodiment, the hook piece 16 is excluded from the region along the sewing line of the band plate portion 12 of the edge core member 10 and the corresponding region of the band plate portion 12 is partially excluded. Other configurations are substantially the same as those in the first embodiment. Therefore, the same code | symbol is attached | subjected to the part which corresponds between embodiment. In this way, the sewing area 10b should be made as thin as possible and the obstructive portion should be eliminated. Therefore, the strip plate portion 12 may be left and the flat substrate 15 may be eliminated. In this case, not only the sewing work is facilitated, but also the sewing needle breakage accident is eliminated.

It is the fragmentary perspective view which looked at the bead core material which is a 1st embodiment of the present invention from the hook one side. It is explanatory drawing which shows the concept when assembling | attaching to the seat pad of the seat sheets of the seat cover obtained by sewing the bead core material of this invention. It is sectional drawing which expands and shows typically the structure of the principal part of seat seats in which the seat cover was assembled | attached. It is a lamination | stacking exploded view which shows roughly the structure of the skin sheet material which is a structural member of a seat cover. It is the fragmentary perspective view which looked at the bead core material which is 2nd Embodiment of this invention from the hook one side. It is a cross-sectional view of the bead core material which is 3rd Embodiment of this invention. It is a cross-sectional view of the bead core material which is 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Ball edge core material 10a Groove part 10b Sewing area | region 11 Ball part 12 Band board part 13 Core material main body 14 Hook part 15 Flat base material 16 Hook piece 17 Seat sheet | seats 17a Edge line part 18 Seat cover 19,20 1st and 2nd Skin sheet material 19a, 20a skin layer 19b, 20b intermediate layer 19c, 20c back base fabric 21 sheet pad 21a armrest part 21b side wall part 21c ridge line part 22, 23 first and second sewing thread

Claims (4)

It has a ball part (11) and a belt plate part (12) molded from a synthetic resin material, and has a large number of hook pieces (16) over the entire area of one side of the ball part (11) and the belt plate part (12). A ball core material (10) that is attached to a required portion of an outer skin sheet material (19, 20) such as a seat, integrally having a hook portion (14),
The hook pieces (16) are formed on the same plane,
Tamaenshinzai hardness of the hook portion (14) is set higher than the hardness of said ball portion (11) and the band plate portion (12), characterized in that.   The bead core material according to claim 1, wherein the ball portion (11) and the belt plate portion (12) are made of an elastomer resin, and the hook portion (14) is made of a thermoplastic resin.   The bead core material according to claim 1, wherein the hook portion (14) is provided continuously or intermittently over the entire surface of at least one of the ball portion (11) and the belt plate portion (12).   The ball core material according to claim 3, wherein a surface of the ball core material (10) forming the hook piece (16) is a flat surface.

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