JP2013132411A - Seat or backrest for chair and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally mold a mesh and a support member without forming any burr at a border between any peripheral part of the mesh and the support member.SOLUTION: In a seat or backrest for a chair in which a mesh member and the support member made of resin are molded integrally, texture or mesh in the mesh member 2 at a portion joined to a seat frame 3, serving as a support member at a peripheral edge of the mesh member 2, is made finer than that in the other portion.

Description

  The present invention relates to a chair seat or backrest and a method for manufacturing a chair seat or backrest. More specifically, the present invention relates to a technique suitable for application to a seat or backrest of a chair composed of a mesh-like membrane member and a support member that holds the peripheral edge thereof.

  Conventionally, as a structure for supporting a seated person's body, such as a chair seat or a backrest, a mesh-like film member that forms a support surface that supports the body of the seated person and a resin frame-like shape that holds the periphery of the film member There is a support member, and these film members and a frame-shaped support member are integrally formed (Patent Document 1).

  Further, as shown in FIG. 6, as a conventional method for integrally forming a frame-shaped support member 102 made of resin and a mesh 101 (101a) stretched inside the support member 102, first, FIG. As shown in (A), the mesh 101 is spread and installed at a position where the hole 105a on the upper surface of the second mold 105 is closed using the fastener 105b, and then, as shown in FIG. When the roofing tool 110 is lowered, the pressing part 112 b of the mesh pressing tool 112 comes into contact with the mesh 101 stretched on the second mold 105, and the spring part 112 c contracts to press the mesh 101 against the second mold 105. It is done. When further pressed, the mesh 101 in which the convex portion 106a of the third mold 106 closes the hole 105a is pushed by the convex portion 106a of the third mold 106, and the convex portion 106a is inserted into the hole 105a. The mesh 101 is fixed in a state where the mesh 101 is sandwiched and stretched between the first mold 104 and the third mold 106. At this time, a part of the mesh 101 is outside the molding space between the convex portion 106a of the third mold 106 and the hole portion 105a of the second mold 105, which is shaped like a portion where the cut mark 101c is formed. (Outer mesh 101b). When the resin is injected into the molding space through the gates 108a, 104b, and 104c and solidified, the mesh 101a inside the frame-shaped support member 102 is stretched on the support member 102, while the frame-shaped support member 102 is stretched. A meshed resin frame is formed in which the outer mesh 101b is pulled out from the mounting groove 103 of the support member 102. And there exists what makes the outer side mesh 101b of the frame-shaped support member 102 cut | disconnect (patent document 2). In FIG. 7, reference numeral 108 represents an injection port of an injection apparatus (not shown) capable of injecting resin, and reference numeral 112 a represents a main body portion of the mesh presser 112.

JP 2001-137065 A Japanese Patent Application Laid-Open No. 2004-90521

  A chair that uses a mesh as a member that constitutes the support surface that supports the seated person's body is generally based on the concept of emphasizing breathability, so the mesh itself can be woven and knitted to support the seated person. Having a sufficient strength and a coarse density, in other words, the texture and stitches are coarse.

  Then, in the case of a conventional mesh having a rough texture and stitch as described above, when the resin frame-like support member 102 is molded in a state where the mesh 101 is set in a mold as in the method of Patent Document 2, for example, Molded in a state where resin leaks from the joints of the upper and lower molds 106, 104 sandwiching 101 to the support member 102 of the inner mesh 101a (the resin oozes out at the weave / knitting). As a result, resin burrs are formed at the peripheral edge of the inner mesh 101 a and between the inner mesh 101 a and the support member 102. In particular, if the upper mold 106 is strongly pressed against the lower mold 104 in order to completely prevent the resin from leaking out from the joint portions of the upper and lower molds 106, 104, the upper and lower molds 106, 104 are pressed against each other. Since the sandwiched mesh 101 is crushed and damaged or torn, the upper mold 106 is strongly pressed against the lower mold 104 so as to completely prevent the resin from leaking from the joint portion. There are also circumstances where it is impossible. The flash generated by the leakage of the resin from the frame (bleeding) can cause discomfort in the thighs and back of the seated person, hurt the skin, and transmit the stockings. It may let you go and tear your clothes. For this reason, there exists a problem that comfort and safety | security will be impaired. Therefore, in the conventional manufacturing process using a mesh, a work process for removing the flash is necessary at the end, resulting in an increase in work man-hours.

  Therefore, the present invention provides a seat or backrest of a chair in which the mesh and the support member are integrally formed without generating a burr at the time of contact with the support member at the periphery of the mesh while ensuring air permeability of the mesh. In addition, the mesh and the support member can be integrally formed without generating a flash with the support member on the periphery of the mesh while ensuring the air permeability of the mesh without increasing the work man-hours. An object of the present invention is to provide a method of manufacturing a chair seat and backrest that can be used.

  In order to achieve such an object, the chair seat or backrest according to claim 1 is supported at the peripheral portion of the mesh member in the chair seat or backrest by integrally molding the mesh member and the resin support member. The mesh / weave of the mesh member at the joint portion with the member is made finer than the other portions.

  Further, in the invention according to claim 2, in the chair seat or backrest according to claim 1, the interval between the weaving yarns in the direction orthogonal to the direction in which the resin leaks when the mesh member is supported is reduced. To make the texture finer.

  According to a third aspect of the present invention, in the chair seat or backrest according to the first or second aspect, the interval between the weaving yarns in the same direction as the direction in which the resin leaks out with the support member of the mesh member is narrowed. The texture is made finer.

  According to a fourth aspect of the invention, in the seat or backrest of the chair according to the first aspect, the stitches are made fine by making the knitting loop fine.

  The invention according to claim 5 is the chair seat or backrest according to claim 1, wherein the mesh member and the supporting member are subjected to integral molding of the mesh member and the support member, and then the necessary tension is applied to the mesh member by heat setting. I am doing so.

  Therefore, according to the seat or backrest of these chairs, in the chair seat or backrest by integral molding of the mesh member and the resin support member, the air permeability of the mesh member is ensured and the integrally molded metal It is possible to prevent the resin from seeping out into the weave / knitting of the mesh member at the joint portion of the mold.

  According to a sixth aspect of the present invention, there is provided a method for manufacturing a chair seat or a backrest, wherein the chair member or the backrest is manufactured by integral molding of a mesh member and a resin support member. The mesh member is placed in the mold so that the stitches are made finer than the other parts, and the parts with the fine weaves / knittings are arranged as the connecting parts with the support member, so that the integral molding is performed.

  The invention according to claim 7 is the method for manufacturing the chair seat or backrest according to claim 6, wherein the spacing between the weaving yarns in the direction perpendicular to the direction in which the resin leaks when the mesh member is supported with the support member. The texture is made finer by narrowing.

  The invention according to claim 8 is the method for manufacturing the chair seat or backrest according to claim 6 or 7, wherein the distance between the weaving yarns in the same direction as the direction in which the resin leaks with the support member of the mesh member. By making the width narrower, the texture is made finer.

  According to a ninth aspect of the present invention, in the chair seat or backrest manufacturing method according to the sixth aspect of the invention, the stitches are made finer by making the knitting loop fine.

  According to a tenth aspect of the present invention, in the chair seat or backrest manufacturing method according to the sixth aspect of the present invention, a necessary tension is applied to the mesh member by heat setting after integral molding.

  Therefore, according to the seat or backrest manufacturing method of these chairs, the breathability of the mesh member is ensured, and the resin may ooze out at the mesh / knitting of the mesh member at the joint portion of the integrally molded mold. A prevented chair seat or backrest is produced.

  According to the seat or the backrest of the chair of the present invention, the breathability of the mesh member can be ensured and the resin can be prevented from oozing out into the mesh / knitting of the mesh member at the joint portion of the integrally molded mold. Therefore, it is possible to ensure comfort and safety by preventing the generation of flash during integral molding while ensuring air permeability due to the mesh.

  In addition, according to the chair seat or backrest manufacturing method of the present invention, the mesh member weave / The chair seat or backrest in which the resin is prevented from seeping out into the knitting stitch can be manufactured, so that the breathability by the mesh is ensured and the generation of flash during integral molding is prevented, thereby improving comfort and It is possible to manufacture a chair seat or backrest that is secured.

It is a perspective view showing the whole structure of the chair of embodiment. It is the left-right direction longitudinal cross-sectional view of a seat. (A) is the whole longitudinal cross-sectional view of the seat of embodiment. (B) is an enlarged vertical sectional view of the frame after the primary molding of the seat frame of the seat of the embodiment and the vicinity thereof. (C) is the enlarged vertical sectional view of the frame after the secondary molding of the seat frame of the seat of the embodiment and the vicinity thereof. It is a top view of a seat. (A) is a top view of the seat of embodiment, and the seat of the front edge part of a mesh member is fine. (B) is a top view of a seat when the eyes of the front edge part and rear edge part of a mesh member are fine. It is a top view of a seat. (A) is a top view of the seat in case the eyes of the right-and-left edge part of a mesh member are fine. (B) is a top view of a seat when eyes are fine over the whole peripheral part of a mesh member. It is the seat frame of the seat of other embodiments, and the expanded longitudinal section of the neighborhood. It is a perspective view which shows the conventional resin frame with a mesh which integrally formed the support member made from resin, and the mesh-shaped film | membrane member stretched by this. It is a figure explaining the conventional method which integrally molds the resin-made support members and the mesh stretched on this using a metal mold | die. (A) is a side view showing the state which installed the mesh in the metal mold | die. (B) is a side view showing a state in which a mesh is fixed with a mesh presser.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 to 3 show an example of an embodiment of the present invention. In the present embodiment, the case where the structure of the present invention is applied to the seat 1 of the chair 10 whose entire structure is shown in FIG. 1 will be described as an example. In the present specification, vertical, front / rear, and left / right are defined based on a seated person sitting on the seat 1 of the chair 10. Further, the mesh member 2 stretched on the chair 10 of the present embodiment shown in each drawing is an image of a weaving method and is not strictly illustrated.

  The chair 10 of the present embodiment includes a seat 1 and a backrest 5, and has a pipe frame 11 for supporting the seat 1 and the backrest 5. The seat 1 includes a mesh member 2 that constitutes a support surface that supports the body of the seated person, and a seat frame 3 as a member that holds and supports the periphery of the mesh member 2. The backrest 5 includes a membrane member 6 constituting a support surface that supports the body of the seated person, and a backrest frame 7 as a member that holds and supports the periphery of the membrane member 6.

  The pipe frame 11 is formed by bending a single pipe. The left and right support portions 11A and 11A for supporting the left and right side portions 3a and 3a of the seat frame 3 of the seat 1 from below and the back of the backrest 5 are provided. Left and right support parts 11B and 11B that support the left and right side parts 7a and 7a of the back frame 7 from behind, and a back support part that supports the upper part 7b of the back frame 7 (hidden by the upper part 7b of the back frame 7) And the left and right circle legs 11C, 11C formed by bending the pipe into a rectangle.

  The seat frame 3 is formed in a rectangular frame shape, and is placed and assembled to the seat left and right support portions 11A and 11A of the pipe frame 11 and fixed. The method of fixing the seat frame 3 to the seat left and right support portions 11A and 11A of the pipe frame 11 is not limited to a specific method / mechanism. For example, the seat frame 3 may be screwed or attached to the lower surface of the seat frame 3 The locking claw that is formed integrally or retrofitted may be hooked by being pushed into the locking hole of the seat left and right support portion 11A.

  The seat frame 3 is made of a synthetic resin, and is integrally molded in a state in which the peripheral portion of the mesh member 2 is integrated by injection molding or the like and the mesh member 2 is stretched inside. Thereby, the tension | tensile_strength for the mesh member 2 to hold | maintain the periphery by the seat frame 3, and to support a seated person is maintained.

  As a material of the seat frame 3, for example, a thermoplastic synthetic resin such as an olefin resin such as polyethylene terephthalate or polypropylene, or a polyester, or a thermosetting synthetic resin can be used. The seat frame 3 does not need to be made of a single material as a whole, and may be partially filled with a reinforcing material such as glass fiber or carbon fiber in a place where strength is required.

  As the mesh member 2, a mesh-like membrane member (woven fabric, knitted fabric) that has elasticity and can support a seated person is used. The material of the mesh member 2 is not limited to a specific material as long as it is elastic and can support the weight of the seated person and can be integrated with the seat frame 3 (integral molding). Any material that can be used as a woven or knitted fabric may be used. For example, a mesh sheet made of polyester can be used. In the present embodiment, as the mesh member 2, a woven fabric in which a polyester yarn as a warp and an elastomeric polyester yarn as a weft are combined can be used. In this embodiment, it is assumed that the front-rear direction yarn is a warp and the left-right direction yarn is a weft.

  In the present invention, the weave / knitting of the mesh member 2 in the peripheral portion of the mesh member 2 and the joint portion with the seat frame 3 is made finer than other portions.

  Here, the connecting portion between the mesh member 2 and the seat frame 3 refers to the joining position of the mesh member 2 between the mesh member 2 and the seat frame 3 and the inner portion of the joining position. Moreover, you may include the part which is the peripheral edge part of the mesh member 2, and is embedded in the seat frame 3 when integrally molding.

  And the width from the outer slide of the mesh member 2 (or the width from the inner slide of the seat frame 3) at the peripheral portion of the mesh member 2 and the connecting portion with the seat frame 3 is limited to a specific size. Is not to be done. That is, when the mesh member 2 and the seat frame 3 are integrally formed, leakage of the resin for forming the seat frame 3 to the mesh member 2 is prevented, and the flash of the mesh member 2 at the time of the seat frame 3 is shown. Is appropriately set so as to secure at least a size necessary to prevent the generation of.

  In the present embodiment, in order to prevent generation of flash in the mesh member 2 and the front portion of the seat frame 3, other portions of the weave of the front edge portion 2a of the mesh member 2 are used as a joint portion between the mesh member 2 and the seat frame 3. It is made finer than 2b (FIG. 3 (A)). Specifically, the interval between the wefts in the front edge portion 2a is made narrower than the interval between the wefts in the other portion 2b. That is, in this embodiment, the front-rear direction is a direction in which the resin leaks out at the front edge portion 2a of the mesh member 2 with the seat frame 3 of the mesh member 2 and the direction in which the resin flash grows. The distance between the left and right wefts, which are orthogonal directions, is reduced.

  In addition, the grade which makes a texture fine is not limited to a specific grade, It sets suitably to a grade required in order to prevent the production | generation of the burr | flash at the time of the seat frame 3 of the mesh member 2 (wrinkle). Specifically, for example, in the example shown in FIG. 3A, it is preferable that there is almost no gap between the wefts in the front edge portion 2a of the mesh member 2, and the wefts in the front edge portion 2a are in close contact with each other. Most preferably, there is no at all.

The seat frame 3 is constituted of an outer frame 3 _B which covers the outer circumferential surface of the inner frame 3 _A and the inner frame 3 _A, by injection molding or the like, the secondary molding of the primary molding and the outer frame 3 _B of the inner frame 3 _A After that, both are integrally formed. Further, the inner frame 3 _A and the peripheral edge portion of the mesh member 2 are integrated.

Specifically, as shown in FIG. 2, first, as a primary molding, the mesh member 2 is integrally formed on the upper surface over the entire circumference of the inner frame 3 _A in plan view (FIG. 2B), then the secondary outer circumferential surface of the inner frame 3 _a state in which the mesh member 2 to the upper surface is pasted as a molding (top, side, bottom surface of the part) to be integrated outer frame 3 _B so as to cover molding (FIG. (C)).

In the primary molding, for example, the peripheral edge of the mesh member 2 is hooked on a holding projection provided inside the injection mold or the peripheral edge of the mesh member 2 is held outside the mold. The mesh member 2 is installed in the mold. Then, the synthetic resin is injected into the cavity while the peripheral edge of the mesh member 2 is housed in the cavity of the mold and cured, and the inner frame 3 _A is injection-molded and integrated with the mesh member 2. In this state, the inner frame 3 _A is molded. Thus, it is integrated with the mesh member 2 and the inner frame 3 _A is.

  Here, the tension applied to the mesh member 2 to exert the elastic force necessary for the seat of the chair may be pre-tensioned when installed in the mold as described above, or heat may be applied after integral molding. It may be given by setting, or pre-tensioning at the time of mold installation and application by heat setting after integral molding may be used in combination. The heat setting refers to applying pretension by causing the mesh member to thermally contract by bringing a heated heat source into contact with or approaching the mesh member.

Further, in the secondary molding, the integrated mesh member 2 and the inner frame 3 _A are installed in a mold for secondary molding, and these are accommodated in the cavity of the mold while being accommodated in the mold cavity. synthetic resin is carried out injection molding of the outer frame 3 _B and cured by injection, in the state in which the outer frame 3 _B integrated outer frame 3 _B is formed in addition to the mesh member 2 and the inner frame 3 _a to The Thereby, the seat 1 is obtained as an integrally molded product in which the mesh member 2 and the seat frame 3 (inner frame 3 _A , outer frame 3 _B ) are integrated.

  In addition, the method of integrally molding the mesh member 2 and the seat frame 3 is not limited to the above-described injection molding method, and may be other methods such as a compression molding method and a casting method.

  According to the seat 1 of the chair 10 configured as described above, the air permeability of the mesh member 2 is ensured in the seat 1 of the chair 10 that is integrally formed with the mesh member 2 and the seat frame 3 that is a resin support member. In addition, it is possible to prevent the resin from bleeding into the weave of the mesh member 2 at the joint portion of the integrally molded mold.

  In addition, according to the seat 1 of the chair 10 configured as described above, it is possible to partially change the amount of deflection of the mesh member 2 to reduce the feeling of hitting the seat frame 3 felt by the seated person.

  In addition, although the above-mentioned form is an example of the suitable form of this invention, it is not limited to this, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. For example, in the above-described embodiment, the case where the structure of the present invention is applied to the chair 10 whose entire structure is shown in FIG. 1 is described as an example. However, the chair to which the present invention can be applied is not limited to the chair 10. The present invention can be applied to a chair having a structure having a mesh member and a support member / frame on which the mesh member is stretched. That is, the use of the chair, the shape of each part, etc. are not limited to specific ones. Of course, a chair without a backrest may be used.

  Moreover, although the case where the structure of the present invention was applied to a chair seat was described as an example in the above-described embodiment, the application target of the present invention is not limited to a chair seat, and is made of a mesh member and a resin. Any structure in which the support member is integrally formed can be widely applied to structures having a support surface that supports the body of a seated person such as a backrest, a headrest, and an armrest.

  In the above-described embodiment, the weave of the front edge portion 2a of the mesh member 2 is made finer than the other portions 2b in order to prevent the generation of flash at the front portion 3b of the seat frame 3 of the seat 1 (see FIG. 3 (A)), the place where the mesh / knitting of the mesh member 2 is made finer than the other portions is not limited to the front edge portion 2a, but may be another portion of the peripheral edge of the mesh member 2. . In other words, it is only necessary to make the weave / knitted mesh of the mesh member 2 finer than the other parts at least at a position where there is a possibility of direct contact with the seated person. Specifically, for example, the weave and stitches of the rear edge portion 2c of the mesh member 2 may be made fine (see FIG. 3B; the interval between the wefts is narrowed), or the mesh member 2 The left and right edge portions 2d, 2d may be finely woven or stitched (see FIG. 4A; the interval between warps is narrowed), or the entire peripheral edge of the mesh member 2 (that is, the front edge) It is also possible to make the texture and stitches fine across the portion 2a, the rear edge portion 2c, and the left and right edge portions 2d and 2d (see FIG. 4B; between the wefts in the front edge portion 2a and the rear edge portion 2c). The spacing is narrowed and the spacing between the warps is narrowed at the left and right edge portions 2d and 2d). Furthermore, when the present invention is applied to the backrest, the texture and stitches may be made fine over the upper edge portion, the left and right edge portions, the lower edge portion, or the entire peripheral edge portion of the backrest.

  Further, in the above-described embodiment, the resin leaks out from the mesh frame 2 with the seat frame 3 (wrinkles) and is perpendicular to the direction (= front-rear direction) in which the resin flash grows (= left-right direction). The spacing between the weave yarns (= weft yarns) is narrowed, but this is not restrictive, and the resin flashes in the direction in which the resin leaks when the mesh member 2 contacts the seat frame 3 (wrinkles). You may make it narrow the space | interval of the weaving yarn of the same direction as the direction to do. In this case, at the periphery of the mesh member 2 and at the joint portion with the seat frame 3, the number of the weaving yarns is increased more than the other portions, or the weaving yarns having a circular cross section are crushed flatly. The intervals may be narrowed or eliminated. Furthermore, the interval between the weaving yarns in both directions in the direction perpendicular to the direction in which the resin flashes and the direction in which the resin flash grows is narrowed at the time of the seat frame 3 of the mesh member 2. Anyway.

  In the above-described embodiment, the mesh member 2 is made of a woven fabric and the mesh member 2 is made finer by narrowing the interval between the weaving yarns. However, the mesh member 2 is not limited to the woven fabric. In addition, the method of making the mesh member 2 finer is not limited to narrowing the interval between the weaving yarns. Specifically, the mesh member 2 may be configured by knitting and the mesh member 2 may be made finer by making the knitting loop finer.

In the above-described embodiment, the seat frame 3 is configured as having an inner frame 3 _A and an outer frame 3 _B (in other words, having a multi-layer structure). It is not limited, and a single layer structure may be used. Specifically, as shown in FIG. 5, the single-layer structure seat frame 3 and the mesh member 2 are integrally formed so that the peripheral end portion of the mesh member 2 is buried from the inner side surface of the seat frame 3. In addition, the present invention is applicable.

1 seat 2 mesh member 3 seat frame 10 chair

Claims (10)

  In the seat or backrest of the chair by integral molding of the mesh member and the resin support member, the mesh member has a weave / knitted stitch at the peripheral portion of the mesh member and a joint portion with the support member than other portions. A chair seat or backrest characterized by a finer detail.   The chair seat or back according to claim 1, wherein the weave is made fine by narrowing the interval between the weaving yarns in a direction perpendicular to the direction in which the resin leaks when the mesh member is in contact with the support member. Drowning.   The seat of the chair according to claim 1 or 2, wherein the weave is made fine by narrowing the interval between the weaving yarns in the same direction as the resin leaks when the mesh member is in contact with the support member. Backrest.   The chair seat or backrest according to claim 1, wherein the stitches are made fine by making the loops of the knitting fine.   The chair seat or backrest according to claim 1, wherein a necessary tension is applied to the mesh member by heat setting after integral molding of the mesh member and the support member.   When manufacturing a seat or backrest of a chair by integrally molding a mesh member and a resin support member, the mesh and stitches at the peripheral edge of the mesh member are made finer than other parts, and the texture and stitches are made finer. A method for manufacturing a seat or a backrest of a chair, wherein the mesh member is installed in a mold so as to be arranged as a joint portion with the support member and is integrally formed.   The chair seat or back according to claim 6, wherein the weave is made fine by narrowing the interval between the weaving yarns in the direction perpendicular to the direction in which the resin leaks when the mesh member is in contact with the support member. A manufacturing method of drowning.   The chair seat according to claim 6 or 7, wherein the weave is made fine by narrowing the interval between the weaving yarns in the same direction as the direction in which the resin leaks when the mesh member is in contact with the support member. Backrest manufacturing method.   The method of manufacturing a chair seat or a backrest according to claim 6, wherein the stitches are made fine by making a knitting loop fine.   The method for manufacturing a chair seat or backrest according to claim 6, wherein a necessary tension is applied to the mesh member by heat setting after the integral molding.

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