WO2014147663A1 - 事務用椅子 - Google Patents
事務用椅子 Download PDFInfo
- Publication number
- WO2014147663A1 WO2014147663A1 PCT/JP2013/001922 JP2013001922W WO2014147663A1 WO 2014147663 A1 WO2014147663 A1 WO 2014147663A1 JP 2013001922 W JP2013001922 W JP 2013001922W WO 2014147663 A1 WO2014147663 A1 WO 2014147663A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- body support
- membrane
- frame member
- film
- yarn
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
- A47C5/02—Chairs of special materials of woven material, e.g. basket chairs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/28—Seat parts with tensioned springs, e.g. of flat type
- A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/02—Upholstery attaching means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/28—Seat parts with tensioned springs, e.g. of flat type
- A47C7/32—Seat parts with tensioned springs, e.g. of flat type with tensioned cords, e.g. of elastic type, in a flat plane
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/56—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads elastic
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D9/00—Open-work fabrics
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/04—Heat-responsive characteristics
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/08—Upholstery, mattresses
Definitions
- the present invention relates to a chair provided with a body support structure that forms a body support surface with a membrane. More specifically, the present invention relates to a chair provided with a body support structure that functions as a seat, a backrest, or the like that includes a frame member and a film whose peripheral portion is supported by the frame member.
- a chair provided with a body support structure that functions as a seat, a backrest, or the like that includes a frame member and a film whose peripheral portion is supported by the frame member.
- This chair constitutes a body support structure with a membrane and a frame member that holds all or part of the peripheral portion thereof so that the membrane constitutes a body support surface.
- the seat fixes a heat-shrinkable film to the frame member under tension or under a tension that is weaker than that required for a body support structure, and then presses an aluminum plate heated from both sides against the film.
- the membrane is heated, and the membrane is contracted vertically and horizontally to give a tension that exhibits the elasticity necessary for the body support structure, thereby forming a flat seat surface (see Patent Document 1).
- an object of the present invention is to provide a chair having a body support structure capable of stretching a membrane into a three-dimensional shape intended.
- a chair provided with a body support structure that forms a body support surface by the membrane of the present invention is deployed in three axial directions of a vertical direction, a horizontal direction, and a depth direction in which the body support structure is orthogonal to each other.
- a three-dimensional frame member that forms a three-dimensional body support surface, and a peripheral portion is fixed to the frame member with no tension or a tension that is weaker than the tension required for the body support surface, and in the vertical and horizontal directions.
- a film that has the necessary tension as a body support surface due to heat shrinkage due to heating after fixing, and the shape of the frame member depends on the difference in tension generated at the time of heat shrinkage of the film
- a three-dimensional body support surface is formed along.
- the film has a contraction rate higher in the longitudinal direction and the lateral direction on the side where the amount of displacement in the depth direction is smaller than the direction on the side where the amount of displacement in the depth direction is large. It is preferable to form a three-dimensional body support surface by shrinking the whole along the three-dimensional shape of the frame member due to the difference in tension generated during thermal contraction with the direction.
- the membrane is a woven fabric made of heat-shrinkable warp and weft.
- the shrinkage rate differs between the length and width of the membrane.
- the elastomer yarn may be woven into either the warp yarn or the weft yarn, or as both the warp yarn and the weft yarn.
- the elastomer yarn may be woven separately from the warp and weft constituting the woven fabric, or may be woven along either or both of the warp and the weft.
- the shrinkage can be varied in the vertical and horizontal directions of the membrane by the elastomer yarn arranged along either one or both of the warp and the weft.
- the membrane is a knitted fabric with heat-shrinkable yarn, and an elastomer yarn having a higher thermal shrinkage than the heat-shrinkable yarn constituting the knitted fabric is inserted and knitted in the course direction so that The shrinkage rate may be varied.
- the elastomer yarn preferably has a different arrangement density depending on the site of the body support structure. For example, when the body support structure is a seat, the three-dimensional surface shape on the front edge side of the membrane Place more elastomer threads in other areas than in other areas, or if the body support structure is on the back, arrange more elastomer threads in the three-dimensional surface of the lumbar support part of the membrane than in other areas Is preferred.
- the mesh-like film made of a woven fabric or a knitted fabric has a finely woven or stitched peripheral portion including the vicinity of the boundary with the frame member than the inner portion.
- the film is heated and heated by spraying a hot fluid such as hot air or superheated steam.
- a three-dimensional curved body-shaped body support intended for a membrane is obtained by utilizing the difference between the three-dimensional shape of the frame member and the tension generated due to the difference in thermal shrinkage between the longitudinal and lateral directions of the membrane. You can shape the surface.
- the contraction rate is higher in the direction in which the displacement amount in the depth direction is smaller in the longitudinal direction and in the lateral direction than in the direction in which the displacement amount in the depth direction is larger.
- the tension in the direction of small heat shrinkage is restricted by the tension of the film in the direction of large heat shrinkage, and the tension in the direction of small heat shrinkage is greatly affected by the tension in the direction of large heat shrinkage.
- the entire membrane shrinks along the three-dimensional shape of the frame member, and the intended three-dimensional body support surface can be easily configured.
- the membrane when the membrane is composed of a woven fabric made of heat-shrinkable warp and weft and an elastomer yarn having a higher thermal shrinkage than the heat-shrinkable yarn constituting the fabric is woven, Since the difference between the vertical and horizontal directions can be greatly varied, an arbitrary tension can be applied without being influenced by the overall contraction of the film. Therefore, the membrane itself is thermally contracted equally in the vertical and horizontal directions, while the elastomer yarn is subjected to high thermal contraction to obtain tension, so that sufficient tension is obtained and the shape of the frame member that supports both ends of the elastomer yarn is obtained. Along the body support surface of the membrane.
- the membrane that weaves the elastomer yarn having a higher thermal shrinkage than the heat shrinkable yarn constituting the woven fabric or knitted fabric how to weave the elastomer yarn, for example, the direction in which the elastomer yarn is arranged, the number of the yarns, the arrangement density, the thickness It is possible to easily vary the contraction rate of the film vertically and horizontally simply by adjusting the above. Therefore, the body support surface can be configured three-dimensionally along the shape of the frame member due to the difference between the vertical and horizontal tensions of the membrane while applying the necessary tension to the membrane itself.
- the repulsive force of the part where the arrangement density of the elastomer thread is increased can be increased. It is possible to improve the support of the user's body in the three-dimensional surface shape portion of the lumbar support portion or the three-dimensional surface shape portion of the lumbar support portion in the case of the back.
- the resin when the weave of the peripheral portion including the vicinity of the boundary with the frame member of the mesh film made of woven fabric or knitted fabric is made finer than the inner portion, the resin is used during the injection molding of the frame member. It does not ooze out on the membrane side and generate burrs. This eliminates the need for a work process for removing burrs, thereby enabling reduction in work man-hours and costs.
- the body support structure provided with tension by spraying a thermal fluid on the film whose peripheral edge is fixed to the frame member has a shape with remarkable displacement in the three-dimensional direction. Even if it is loose like a large wave, there is no local temperature difference, so there is no unevenness in color due to spots on the shrinkage, and color unevenness does not occur. There is no risk of it occurring.
- FIG. 3 is an end view of a seat taken along line III-III in FIG. 1.
- FIG. 4 is an end view of the seat taken along line IV-IV in FIG. 1.
- the heat insulation chamber is omitted from the illustration and the heating chamber is illustrated.
- the illustration of the heat insulating wall of the furnace body is omitted, and the heating chamber is illustrated.
- the heating chamber is illustrated without showing the door. It is a schematic explanatory drawing which shows the locus
- FIG. 1 shows a pipe chair including a body support structure that forms a body support surface that supports a user's body with a membrane as a seat and a back as an embodiment of the chair of the present invention.
- the chair 8 has a seat 5 and a back 6 constituted by a body support structure 1 constituted by a membrane 2 and a frame member 3 that supports the periphery of the membrane 2, and is supported by a pipe frame 7. .
- the vertical, front / rear, and left / right directions are determined based on the user seated on the chair seat 5, and the vertical direction (Y axis) and the horizontal direction (X axis) perpendicular to each other determine three-dimensional coordinates.
- the three axis directions of the depth direction (Z axis) are determined on the basis that the body support surface of each body support structure is the XY plane, and the vertical direction (Y) axis direction of the three-dimensional coordinates is the front and rear or the top and bottom of the chair. Defined as coincident with direction.
- the body support structure 1 includes a three-dimensional frame member 3 that forms a three-dimensional body support surface 4 that extends in three axial directions, ie, a vertical direction, a horizontal direction, and a depth direction, which are orthogonal to each other.
- the peripheral edge portion is fixed to the frame member 3 with a tension weaker than the tension required for the surface 4, and the membrane 2 is provided with the necessary tension as the body support surface 4 by heat shrinkage after heating.
- the thermal contraction rate is made different between the vertical direction and the horizontal direction of the film 2, and the three-dimensional body support surface 4 is formed along the shape of the frame member 3 by the difference in the generated tension during the thermal contraction. .
- the frame member 3 is made of a thermoplastic synthetic resin such as a polyester such as polyethylene terephthalate (PET) or an olefin resin such as polypropylene (PP) or a thermosetting synthetic resin that cures at a lower temperature than the film 2. It is molded into a desired three-dimensional shape as having the rigidity that can maintain the tension of the membrane 2 itself.
- a thermoplastic synthetic resin such as a polyester such as polyethylene terephthalate (PET) or an olefin resin such as polypropylene (PP) or a thermosetting synthetic resin that cures at a lower temperature than the film 2. It is molded into a desired three-dimensional shape as having the rigidity that can maintain the tension of the membrane 2 itself.
- PET polyethylene terephthalate
- PP polypropylene
- the front edge portion vicinity 2a of the membrane 2 is provided so as to form a curved surface curved downward.
- the waist 6 of the back 6 is slightly bent forward in the Y-axis direction and protrudes backward in the X-axis direction as a whole.
- the body support surface 4 is formed so as to be slightly curved and has a waist region 4a that supports the waist of the user along the shape.
- the frame member 3 is made of an olefin resin and the membrane 2 is made of polyester, and these are disposed so as to be joined without using a metal such as a screw, so that the body support structure 1 is separated and discarded. It can be recycled as it is.
- the material of the film 2 and the frame member 3 is limited to the example of this embodiment.
- the frame member 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 some places where strength is required. .
- the membrane 2 includes all membranes made of a heat-shrinkable material having flexibility required to produce strength and elasticity required for the body support structure 1 such as the chair seat 5 or the back 6. It can be used in any form such as a woven fabric, a knitted fabric, a woven fabric or a knitted mesh, a non-woven fabric, or a film, preferably a polyester yarn, a nylon yarn, etc. It is to use a woven fabric or a knitted fabric made of thermoplastic resin fibers, and further a mesh made of a woven fabric or a knitted fabric (in this specification, these are collectively referred to simply as a mesh), more preferably in the form of a mesh.
- a mesh made of a woven fabric or a knitted fabric
- the membrane 2 When the membrane 2 is made of a mesh, high breathability can be obtained, so that a comfortable body support structure 1 that is comfortable to sit on can be obtained.
- the membrane 2 may be any membrane-like material that has heat-shrinkability and has the elasticity and strength necessary for the body support structure 1, and is not limited to a mesh, such as a woven fabric, a knitted fabric, or a non-woven fabric.
- a film-like material made of another material such as a film may be used.
- the film 2 is made of an elastic material having heat shrinkability, and has different heat shrinkage rates in the vertical direction and the horizontal direction.
- the membrane 2 in this embodiment is composed of warp yarns 10 and weft yarns 11 composed of a plurality of strands (hereinafter referred to as polyester strands or simply polyester yarns) 12 formed by twisting polyester yarns.
- the base fabric is composed of a woven mesh, and is slightly shrunk in both the warp and weft directions by heat treatment.
- the direction in which the amount of displacement in the depth direction is smaller in the direction in which the film 2 needs to be further contracted, that is, the longitudinal direction (Y-axis direction) and the lateral direction (X-axis direction) of the film 2 is deep.
- the heat shrinkage rate is different between the vertical direction and the horizontal direction so that the heat shrinkage rate is higher than the direction with the larger displacement in the vertical direction. So that there is a difference in the generated tension.
- an elastomeric polyester yarn (hereinafter simply referred to as an elastomer yarn) 13 made of monofilament is a polyester strand in the lateral direction (X-axis direction) of FIG.
- X-axis direction lateral direction
- a mesh-like base fabric portion that is equally heat-shrinked in both longitudinal and lateral directions is woven with the polyester yarn 12, and an elastomer having a higher thermal shrinkage rate than the ground yarn, that is, the polyester yarn 12, along one yarn of the base fabric.
- the contraction rate differs in the vertical and horizontal directions in the overall contraction of the membrane 2.
- the film 2 forms a curved surface 2 a corresponding to the curved portion 5 a of the frame member 3.
- a material having a heat shrinkage rate higher than that of an elastic yarn having a heat shrinkability constituting the base fabric that is, a ground yarn, for example, polyester, urethane, nylon, olefin, styrene, chloride, Vinyl-based thermoplastic elastomer materials can be used, and polyester-based and urethane-based thermoplastic elastomers are particularly preferable.
- the number of the warp yarns 10 and the weft yarns 11 is not limited to the above-mentioned five to five, but is formed by combining arbitrary numbers as necessary.
- the warp yarn 10 composed of five polyester strands 12 and two elastomers
- the mesh may be woven with the weft 11 formed by arranging one polyester strand 12 between the conductive polyester monofilaments 13, so that the contraction rate may be different in the vertical and horizontal directions.
- the elastomer yarn 13 does not need to be a monofilament and may be a strand depending on the case.
- the elastomer yarn 13 does not need to be woven as part of the base fabric, that is, the weft 11 or the warp 10, and in some cases, separately from the base fabric portion, as an insertion yarn, for example, an elastomer on the mesh eye 9 portion. Only the permeable polyester monofilament 13 may be woven.
- the warp 10 of the membrane 2 made of mesh fabric is in the longitudinal direction (Y-axis direction) of the body support structure 1
- the weft 11 is in the lateral direction (X-axis direction) of the body support structure 1.
- the warp thread 10 corresponds to the lateral direction (X-axis direction) of the body support structure 1 and the weft thread 11 corresponds to the longitudinal direction (Y-axis direction) of the body support structure 1 in a reverse relationship to that shown in the figure. It may be arranged.
- the configuration of the film 2 is not necessarily limited to the above embodiment.
- the materials of the warp 10 and the weft 11 are different, for example, at least two kinds of elastic materials having different heat shrinkage rates under the same heating temperature are used as the warp 10 and the weft 11 and the mesh is woven. It is one Embodiment. Further, regardless of whether one of the warp yarn 10 and the weft yarn 11 is a strand or a monofilament, the warp yarn 10 and the weft yarn 11 are all made of an elastomeric polyester yarn 13 and the other one is made of a polyester yarn 12. A woven fabric or a mesh made of woven fabric may be woven.
- the warp yarns 10 or the weft yarns 11 may be thinned out and included in some warp yarns.
- the elastomeric polyester monofilament 13 when the elastomeric polyester monofilament 13 is woven alone into the mesh 9 portion, it may be woven by thinning without passing through all the eye 9 portions.
- the elastomer yarn 13 may be used for both the warp 10 and the weft 11 so that the woven fabric or the mesh membrane 2 made of the woven fabric may be woven.
- the elastomer yarn 13 is not limited to being woven as part of the weft 11 and the warp yarn 10, but depending on the case, the entire warp yarn 10 and the weft yarn 11 may be composed of the elastomeric polyester yarn 13.
- the elastomer yarn 13 as the weft 11 and the elastomer yarn 13 as the warp 10 by using thermoplastic elastomer yarns having different thermal shrinkage rates, it is possible to obtain a film 2 having different shrinkage rates in the vertical and horizontal directions. .
- the elastomer yarns 13 are woven along both the warp yarns 10 and the weft yarns 11 to obtain the membrane 2 having different shrinkage ratios in the vertical and horizontal directions. You may do it.
- the elastomer yarn 13 can be woven as the warp yarn 10 and the weft yarn 11 or as an insertion yarn different from these regardless of whether it is a strand or a monofilament.
- the elastomer yarn 13 having the same heat shrinkage rate is used as the warp yarn 10 and the weft yarn 11 or as an insertion yarn disposed along both the warp yarn 10 and the weft yarn 11, by adjusting the number of used yarns and the thickness, It is also possible to provide a difference in tension generated between the longitudinal direction and the lateral direction of the membrane 2.
- a film having different heat shrinkage in the vertical direction and the horizontal direction for example, a film made of polyvinylidene chloride can be used.
- the warp 10 and the weft 11 have different numbers of strands or monofilaments, that is, the density of the warp 10 and the weft 11, that is, the driving-in. Also by making the number different, the contraction amount and tension can be made different between the vertical direction and the horizontal direction of the film 2.
- the number of warp yarns 10 or weft yarns 11 may be made different in the entire region of the membrane 2, or the amount of thermal shrinkage between a part of the membrane 2 and other parts may be made different.
- the warp yarns 10 and the weft yarns 11 may be woven with different numbers of elastomer yarns 13 so that the shrinkage rates are different in the vertical and horizontal directions.
- the number of weaves of the elastomeric polyester yarns 13 made of monofilaments or strands may be made different depending on the part of the body support surface by changing the arrangement density depending on the part of the body support structure 1. .
- the body support structure 1 is a seat 5
- the body support structure 1 is the back 6, placing more elastomer yarns 13 in the three-dimensional surface shape portion of the lumbar support portion 4 a of the membrane 2 than the other regions supports the vicinity of the user's waist. Preferred above.
- the membrane 2 is a knitted fabric made of heat-shrinkable elastic yarn or a mesh made of a knitted fabric.
- a heat-shrinkable elastic material is used as the ground yarn 28, and an elastomer yarn 13 different from the ground yarn 28 is inserted into the entire knitted fabric in the course direction (lateral direction). It may be included.
- the elastomer yarn 13 having a thermal contraction rate higher than that of the heat-shrinkable base yarn 28 constituting the knitted fabric results in a knitted structure in which the thermal contraction rate of the film 2 differs vertically and horizontally.
- the elastomer yarns 13 are juxtaposed in the wale direction (longitudinal direction) so as to penetrate the base knitted fabric constituted by the ground yarns 28.
- the elastomer yarns 13 may be arranged at a constant pitch in the wale direction, or may be densely or coarsely arranged as necessary.
- the knitting method of the base knitted fabric is not limited to a specific knitting method.
- the amount of shrinkage between the length and width depending on the manufacturing method.
- the shrinkage amount of the elastomer yarn 13 has an upper limit
- the polyester yarn 12 and the elastomer are subjected to heat treatment once before the membrane 2 is fixed to the frame member 3, for example, during finishing in the weaving process in the manufacturing stage of the membrane 2.
- the yarn 13 is heat shrunk. Since the shrinkage amount of the elastomer yarn 13 at this time becomes large, the shrinkage amount of the elastomer yarn 13 in the tension applying step to the membrane 2 performed after the membrane 2 is attached to the frame member 3 is reduced.
- the amount of shrinkage of the elastomer yarn 13 during the tension applying step to the membrane 2 can be adjusted to a desired value by adjusting the temperature during the production of the membrane 2.
- the polyester yarn 12 has a different shrinkage amount depending on the dyeing method such as the temperature at which the yarn is heated at the time of dyeing and the number of times of heating. Therefore, by selecting the dyeing method, The shrinkage amount of the yarn 12 can be adjusted to a desired value.
- the shrinkage amount of the yarn at the time of applying the tension to the membrane 2 can be adjusted to a desired value.
- the membrane 2 when a mesh composed of woven fabric or knitted fabric is used as the membrane 2, since the concept is generally focused on breathability, the mesh itself is sufficiently woven and knitted to support the user. In addition to ensuring a sufficient strength, the material has a coarse density, in other words, the texture and stitches are coarse. For this reason, when the frame member 3 is injection-molded in a state where the mesh-shaped film 2 is set as an insert in the injection-molding mold, the upper and lower molds sandwiching the mesh-shaped film 2 from the mold contact surface portions. There is a possibility that the resin leaks and the resin oozes out into the weave / knitting of the mesh-like film 2.
- a part that is in trouble when the flash can be made, for example, the inner side of the membrane 2 at the boundary portion with the frame member 3 at the peripheral portion of the membrane 2.
- the texture / knitting at the boundary portion between the body support surface and the frame member that is highly likely to come into contact with the user's body is made finer than the other portions.
- the texture of the film 2 of the curved surface portion 2a is finely and densely formed.
- the curved portion 2a of the membrane 2 near the front edge 5a of the seat 5 is supported so that the back of the thigh near the knee of the user does not hit the side 3b on the front side of the frame member 3 of the seat 5. Therefore, since a strong tension is required, it is desired to increase the density of the elastomer yarn 13 in the curved surface portion 2a. Therefore, the density of the membrane 2 of the curved surface portion 2a is increased by increasing the number of the elastomer yarns 13 woven in the lateral direction and finer the density of the membrane 2 than in other regions. Both the density is increased to make it difficult to go. That is, it is possible to reduce the feeling of hitting the frame member 3 that the user feels by partially changing the amount of deflection of the film 2.
- the gap between the weaving yarns in the direction perpendicular to the direction in which the resin leaks out with the frame member 3 of the mesh-shaped film 2 or the frame of the film 2 It is preferable to make the texture finer and finer by narrowing the interval between the yarns in the same direction as the direction in which the resin leaks out with the member 3 or the interval between the two simultaneously.
- the warp yarns 10 or the weft yarns 11 can be separated from each other by increasing the number of weaving yarns compared to other parts, crushing the weaving yarn having a circular cross section flatly, or dividing and spreading a plurality of strands in a bundle. Try to narrow or eliminate the interval.
- membrane 2 can be made fine by making a knitting loop fine.
- the region in which the texture of the mesh-like film 2 is finely and densely includes the region that occupies the inner side of the frame member 3 to the outer periphery.
- the width of the region of the texture that protrudes inward from the frame member 3 is not limited to a specific size. That is, when the membrane 2 and the frame member 3 are integrally formed, leakage of the resin for molding the frame member 3 into the membrane 2 is prevented, and generation of flash when the membrane 2 is in contact with the frame member 3 is prevented. It is set as appropriate to ensure at least the required size.
- the place where the mesh / membrane of the mesh-like film 2 is made finer than the other portions, that is, the dense portion is not limited to the front edge portion 2a of the seat 5 as shown in FIG. It may be provided at any position where there is a possibility of direct contact with other portions of the peripheral portion of the film 2 in the vicinity of the boundary or the user in the entire region.
- the above-described dense portion may be provided over the entire circumference of the front edge portion 2a, the rear edge portion 2c, and the left and right side edge portions 2d of the film 2, or in some cases.
- the above-described dense portion may be set on both the front edge portion 2a and the rear edge portion 2c, only the rear edge portion 2c, or only the left and right side edge portions 2d.
- the distance between the wefts 11 is reduced at the front edge 2a and the rear edge 2c, the distance between the warps 10 is narrowed at the left and right side edges, or the distance between the wefts 11 and the warps 10 are By narrowing the interval at the same time, leakage of resin is prevented. The same applies when applied to the back 6.
- the three-dimensional shape of the frame member 3 and the membrane 2 are heated by heating after the membrane 2 is fixed to the frame member 3. Combined with the difference in the generated tension in the vertical and horizontal directions during heat shrinkage, it is stretched on the three-dimensional body support surface 4 along the shape of the frame member 3.
- the three-dimensional body support surface 4 is formed along the three-dimensional shape of the frame member.
- the membrane 2 and the frame member 3 are fixed to each other without applying a necessary tension to the membrane 2 so that the membrane 2 and the frame member 3 are integrated, so that bonding, screwing, stapling, sewing, fitting of irregularities, membrane 2
- various fixing methods such as sandwiching between two frame members 3 divided along the surface.
- the frame member 3 is formed by injection molding, the method of integrating the film 2 that has been cut into a predetermined shape and size as an insert into the mold as an insert or by two-color molding or the like is a work process. This is preferable because it can be simplified and the appearance can be improved.
- this does not mean that the fixing method of the film 2 and the frame member 3 is limited to insert molding or two-color molding.
- the film 2 having heat shrinkability is not applied to the mold 16 for injection molding the frame member 3 composed of the upper mold 14 and the lower mold 15.
- the mold is closed after being placed as an insert under tension or under a tension that is weaker than that required for the body support structure 1, and a thermoplastic resin is injected into the cavity 18 in which the periphery of the membrane 2 is housed.
- the frame member 3 is formed by solidifying.
- the peripheral portion of the film 2 in the cavity 18 is fixed to the injection molded product, that is, the frame member 3 so as to be wound around the injection molded frame member 3 or attached to the surface of the injection molded product. Integrated.
- the resin flows through the cavity 18 so that the resin passes through the gap between the yarns of the mesh fabric and covers the membrane 2 during the injection molding of the frame member 3.
- the film 2 formed in advance is integrated and fixed to the frame member 3 formed by injection molding. Therefore, when forming the frame member, a device for pulling the film 2 and applying a necessary tension in advance is not required, and the manufacturing apparatus can be simplified.
- the edge of the membrane 2 is integrated with the frame member 3 without protruding from the cavity 18, trimming work for cutting the membrane 2 from the frame member 3 becomes unnecessary, the number of work steps can be reduced, and the body support structure It is possible to reduce the amount of the film 2 necessary for manufacturing the product 1.
- Fixing of the membrane 2 in the cavity 18 is not essential, and in some cases, it is possible to simply sandwich the mesh between the upper and lower molds 14 and 15, but as shown in FIG. 8A, for example. If a core pin 17 or the like for forming the vertical through-hole 19 is present in the frame member 3, the core pin 17 is used to pierce the edge of the membrane 2 and temporarily fix it, or the membrane 2 A fixing means such as a core pin or a protrusion for fixing the mold is prepared separately, or the position of the molten resin injection gate 20 is devised and one of the mold surfaces is injected by the injection force of the molten resin itself injected into the cavity 18. You may make it fix by pressing to.
- the membrane 2 when the membrane 2 is arranged in the center of the cavity 18, for example, the membrane 2 is sandwiched by core pins (not shown) protruding from both the upper die 14 and the lower die 15 to float the membrane 2 in the cavity 18.
- the single-layer frame member 3 as shown in FIG. 6 in which the membrane 2 is completely embedded and integrated in the frame member 3 can be obtained by insert molding.
- the membrane 2 may be exposed on the surface of the frame member 3 when the membrane 2 in the cavity 18 is not fixed or pressed against the mold surface during insert molding. In this case, it is desired to improve the appearance by covering the joint portion 3C between the frame member 3 and the membrane 2 with the cover member 3B because of a design requirement. Further, when the cover member 3B is molded on the primary molded product 3A and integrated into the frame member 3 having a two-layer structure, the bonding strength between the membrane 2 and the frame member 3 can be reinforced. In addition, according to the two-color molding, as shown in FIGS.
- the multi-layer structure of the primary molded product 3A of the frame member 3 to which the film 2 is fixed and the cover member 3B covering the outer side of the frame member 3 is attractive.
- An integrally molded product of the good film 2 and the frame member 3 can be easily obtained.
- the cover member 3B is made of olefin-based resin or polyester so that the entire body support structure 1 can be recycled as it is.
- the cover member 3B made of, for example, an elastomeric resin, the hard member is prevented from directly hitting the user's body, the user is prevented from giving pain and discomfort, and the comfort is good. Can be.
- the cover member 3B is made of a resin having high hardness, for example, the strength of the body support structure 1 can be increased.
- the cover member 3B is formed on the frame member 3 by, for example, two-color molding illustrated in FIGS. 9A to 9C or two-color molding continuous with insert molding using a slide mold illustrated in FIG.
- a primary molded product 3A before heat treatment in which a frame member 3 and a film 2 obtained by insert injection molding using another mold are integrated for example,
- the thermoplastic resin such as PET or PP is injected around the joint surface 3c of the primary molded product 3A while being positioned using the pin 22 or the like and placed in the cavity 23 of the injection mold 21 of the cover member 3B (FIG. 9B)
- the injection molding of the frame member 3 and the injection molding of the cover member 3B are performed by using slide molds 24 and 25 having a slide block 26 capable of forming a cavity 27 for secondary molding as shown in FIG. It is also possible to carry out continuously without opening the molds 24 and 25.
- the frame member 3 is injection molded, the frame member 3 is molded by injecting resin into the cavity after fixing the slide block 26 to the inner closed position. Thereafter, the slide block 26 is retracted and fixed to the outside open position, a cavity 27 is created between the frame member 3 and the block 26, and resin is injected into the cover member 3B to form the cover member 3B as shown in FIG. To do.
- a thermosetting resin may be employed as the material of the cover member 3B, and the cover member 3B may be formed by compression molding or transfer molding.
- the cover member 3B is formed around the frame member by two-color molding by moving to another mold or shifting the slide block 26 in the same mold.
- the present invention is not particularly limited to this, and after the injection molding of the frame member 3, only the upper mold is replaced, and the cover member 3B is formed by using the integrally molded product of the frame member and the membrane 2 as an insert member. You may make it integrally mold around a frame member continuously.
- the cover member 3B may be molded by two-color molding using an integrally molded product of the frame member and the film 2 after the heat treatment as an insert member.
- the cover member 3B produced in advance by injection molding or the like may be integrated by fixing by screwing, bonding or welding so as to cover the joint surface 3c between the frame member 3 and the film 2. good.
- the cover member 3B only needs to cover at least the fixing portion 3C of the film 2 and the frame member 3, but in some cases, for example, as shown in FIG. It may be integrated. In this case, the joint portion 3c between the frame member 3 and the membrane 2 can be hidden to improve the appearance, and the appearance of the body support structure 1 as if it is a single member can be improved. it can.
- the frame member 3 divided into two in the thickness direction along the body support surface 4 is separately injection-molded, and the periphery of the film 2 between them.
- the frame member and the membrane may be integrated by integrating the frame divided after sandwiching the frame by bonding, screwing, fitting or sewing. In this case, if a fitting part and fine unevenness
- the film 2 fixed in a relaxed state to the frame member 3 as described above is given a desired tension by the subsequent heat treatment.
- this heat treatment it is necessary to thermally contract only the film 2 without causing deformation of the frame member 3.
- the heating is carried out by heating the film 2 to a temperature sufficient to cause thermal contraction while maintaining a temperature lower than its melting temperature.
- a tension applying device for performing the heat treatment in a form such as a seat in which a flat surface of a film inside the frame member occupies most, heating using an electric heater as a heat source as shown in FIGS. It is easy to use a tension applying device using a plate.
- the film before heating surrounded by the frame member 3 having a large curved surface or a variety of changes is in a slack state as if it was greatly undulated, the heated plate is brought closer to and pressed against the film. Therefore, when the film is to be heated, there is a possibility that unevenness of color may occur due to unevenness of the shrinkage caused by local heating and the color becoming darker or thinner.
- This tension applying device is formed by a receiving jig 31 between a pair of upper and lower heating plates 34 and 35 attached to a pedestal 30 so as to be movable up and down by cylinder devices 36 and 38 and elevating guide means 37 and 39.
- the body support structure 1 in which is restrained is set, and the heating plates 34 and 35 are brought close to each other and heated.
- the receiving jig 31 that restrains the film-like support frame 3 is mounted on a feed table 32 that moves between the removal position of the body support structure 1 and the heating position along the guide rail 33.
- the body support structure 1 is set on the receiving jig 31 on the feed table 32 at the removal position on the front side of the heating plates 34 and 35 and sent to the heating position between the upper and lower heating plates 34 and 35.
- the heat treatment is performed, and after the heat treatment, the upper and lower heating plates 34 and 35 are retracted and then retracted to the take-out position before being taken out.
- the heating plates 34 and 35 preferably have a similar shape smaller than the inner contour shape of the frame member 3 when viewed from above, and are substantially parallel to the film 2 stretched by thermal contraction when viewed from the side. It has a heating surface.
- the heating surface is formed which is formed in a rectangular shape, is horizontal as viewed from the side, and has curved portions 34 a and 35 a corresponding to the curved surface portion 2 a of the front edge portion 5 a of the seat 5.
- the heating plates 34 and 35 are provided with heaters in consideration of maintaining a uniform temperature distribution.
- the heating plate is disposed on both the front surface side and the back surface side of the film 2 so that both surfaces of the film 2 are heated and contracted at the same time, thereby preventing distortion and warping and forming the film 2 in a short time.
- necessary tension can be applied, in some cases, only one of the heating plates 34 and 35 may be disposed, and a heat reflecting plate or the like may be disposed on the other side.
- the shape of the heating plates 34 and 35 depends on the inner contour shape and the curved surface shape of the frame member 3, it is not limited to the illustrated shape.
- the heating plates 34 and 35 and the frame member 3 By providing the gap L1 between the two, the heat of the heating plates 34 and 35 is hardly transmitted to the frame member 3, or the heat shielding plate 40 protruding from the peripheral edge of the upper heating plate 34 toward the film 2 is provided for heating. You may make it prevent that the heat
- the heating plate when the heating plate is provided with the heat shield plate 40, it is possible to prevent heat from escaping from the periphery of the heating plate 34 to the frame member 3 side, and at the same time, the heat shield plate 40 also prevents cold air from entering from the surroundings.
- the temperature of the heating plate 34 inside the enclosure of the heat shield plate 40 can be made uniform, and the film 2 can be heated uniformly.
- the heating of the membrane 2 is separated from the membrane 2 in order to prevent the membrane 2 from being melted by direct contact with the heating plates 34 and 35, or from causing the mesh pattern to become uneven due to the heating spots. It is preferable to carry out from the position, and more preferably, the interval can be adjusted so as to follow the contraction deformation of the film 2. In this case, the necessary tension can be applied to the membrane 2 in a short time by reducing the distance between the heating plates 34 and 35 and the membrane 2 as much as possible. Therefore, in the present embodiment, the cylinder devices 36 and 37 that expand and contract toward the membrane 2 are used, and the heating plate on the side where the slackness of the membrane 2 protrudes, in the case shown in FIG.
- the upper heating plate 34 to be arranged is supported so as to be movable up and down.
- the lower heating plate 35 may be moved up and down by the cylinder 39.
- the cylinder device 39 supports the heating plates 34 and 35 at a position away from the film 2 so that the film 2 does not touch the film 2 at the initial stage of heating when the film 2 is slack.
- the heating plates 34 and 35 are extended so as to approach the film 2 as shown in FIG. 8C.
- the upper heating plate 34 is moved so that the distance between the surface formed by the film 2 after heat shrinkage and the heating surface of the upper heating plate 34 changes stepwise from 40 mm ⁇ 30 mm ⁇ 15 mm. I have to.
- the apparatus of this embodiment shown to FIG. 12, 13 raises / lowers both the upper side heating plate 34 and the lower side heating plate 35, it is not restricted to this in particular, The example of FIG. 8B
- only the upper heating plate 34 may be moved, or only the lower heating plate 35 may be moved.
- the movement control of the heating plates 34 and 35 that is, the expansion / contraction control of the cylinder 39 is normally automatically controlled by using various sensors such as a temperature sensor and a distance sensor, a timer, etc. Manual control may be used.
- the temperature and heating time for heating the membrane 2 are controlled within the ranges exemplified below. That is, the temperature in the case of the heating plates 34 and 35 that are substantially in contact with the film 2 such as the lower heating plate 35 is preferably in the range of about 120 to 250 ° C., for example, in the range of about 180 to 190 ° C. It is more preferable.
- the temperature in the case of the heating plates 34 and 35 that are not in contact with the film 2 such as the upper heating plate 34 is preferably in the range of about 180 to 300 ° C., for example, in the range of about 190 to 240 ° C.
- the heating time is preferably about 40 to 120 seconds, for example.
- the temperature of the frame member 3 during the heating of the film 2 is preferably room temperature or a temperature close to room temperature, and the temperature difference between the film 2 and the frame member 3 during the heating is about 5 to 200 ° C. Is preferable, and it is more preferable that it is 150 degreeC or more. However, the optimum heating conditions can be changed depending on the material of the film 2 to be selected, and are not necessarily limited to the above conditions.
- FIGS. 14 to 17 show examples of tension applying devices using a thermal fluid.
- the tension applying device includes a receiving jig 41 that restrains the film-like support frame 3 of the body support structure 1, a duct 42 that blows thermal fluid toward the film 2 in a spot manner, and the receiving jig 41 or the duct 42.
- An XY table 45 having shaft feed mechanisms 43 and 44 that are mounted and fed in the x-axis direction and the y-axis direction, and a heating chamber 46 that accommodates the receiving jig 41, the duct 42, and the XY table 45 are partitioned.
- a furnace body 40 having an openable / closable work inlet / outlet port 47 for carrying in / out the body support structure 1 and an exhaust port (duct) 53 for exhausting the thermal fluid after heating the membrane 2 to the outside of the heating chamber;
- a thermal fluid generation source 49 that generates thermal fluid and supplies the thermal fluid to the heating chamber 46 via the duct 42, and the duct 42 that fixes the thermal fluid generated by the thermal fluid generation source 49 to the ceiling of the heating chamber 46.
- the hot fluid is preferably hot air or superheated steam, and more preferably hot air.
- the furnace body 40 is covered with a heat insulating cover.
- the hot air is adjusted and supplied so that the outlet temperature of the thermal fluid generator 49 is about 220 ° C., and is supplied from the duct 42 to 190 ° C. to 200 ° C. It is provided so that it can be blown out in a state where the temperature is lowered to about ° C.
- the duct 42 is fixed so as to be located at the center of the furnace body 40, that is, at the origin of the coordinate axis of the XY table 45 of the heating chamber 46, and is supported by the film-like support of the body support structure 1 positioned by the receiving jig 41. It is provided so as to move the blowing position relative to the frame 3.
- the hot air after being used for heating the membrane is exhausted from the furnace through the exhaust duct 53 by the forced ventilation.
- Heating with hot air is controlled at 200 ° C. for about 45 seconds so that the gap between the duct 42 that blows out hot air and the frame member 3 is about 30 mm.
- the XY table 45 includes a receiving jig 41 that holds the three-dimensional frame member 3 for positioning.
- the XY table 45 is disposed between the duct 42 that blows hot air between the membrane 2 and the feed screw mechanisms 43 and 44 in two orthogonal directions. Are provided so that relative movement in the vertical direction (Y-axis direction) and the horizontal direction (X-axis direction) can be freely provided.
- the screw shafts of the feed screw mechanisms 43 and 44 are rotationally driven by drive motors 50 and 51 installed outside the furnace body 40, respectively.
- the receiving jig 41 for holding the frame member 3 for positioning is composed of, for example, four claws for gripping the frame member 3 from four sides at intervals of 90 ° from the periphery, and the frame member 3 can be easily attached with one touch. It is possible.
- a work entry / exit 47 for carrying in / out the body support structure 1 is provided in front of the furnace body 40, and can be opened / closed by a door 48 that can be driven up and down by an air cylinder 52 installed in front of the work entrance / exit. Yes. Normally, the opening and closing of the door 48 and the blowing of hot air are controlled so as to be interlocked. After the body support structure 1 is set on the receiving jig 41 and the door 48 is closed, the hot air is blown, and a predetermined heating tact time is reached. It is provided so that the hot air blowout is stopped or the blowout amount is reduced before the door 48 is opened.
- the relative movement between the membrane 2 and the duct 42 is performed while alternately repeating the vertical movement from end to end of the membrane (not shown) and the traverse in the horizontal direction.
- the control of the XY table 45 so as to move to one end and further to the other end. More specifically, the position where the hot air is blown out, that is, the position of the duct 42 is relatively moved in the order indicated by the numbers 1-9 circled in FIG. While heating the entire region, the entire region is contracted to apply tension.
- the side indicated by the symbol ⁇ is the worker side, that is, the door 48 side.
- the door 48 of the work entrance 47 is opened, the body support structure 1 is set on the receiving jig 41 in the heating chamber 46, and the door 48 is closed.
- Heat treatment can be started.
- the heat treatment is performed in a state where the film-like support frame 3 of the body support structure 1 is constrained and the hot air or superheated steam blown out in a spot position is repeatedly centered while repeating the vertical movement and the horizontal movement.
- the membrane 2 fixed in a relaxed state on the three-dimensional frame member 3 is neatly stretched, and is formed into the shape of the frame member due to the difference in tension caused by thermal contraction between the longitudinal direction and the lateral direction of the membrane.
- a three-dimensional body support surface 4 is formed.
- the heat treatment does not need to be performed while being attached to and restrained by the receiving jig 41 as in the above-described tension applying device, and the melting temperature of the frame member 3 is sufficiently higher than the temperature necessary for the thermal contraction of the film 2.
- the body support structure 1 before applying the tension taken out from the mold is passed through a continuous or batch-type heating furnace such as a far-infrared furnace, and the temperature in the frame member 3 is set to the melting temperature of the frame member 3 depending on the furnace atmosphere.
- the membrane 2 may be heated while being kept at a lower temperature, and the membrane 2 may be thermally contracted to give the membrane 2 a tension that exhibits the elasticity required for the body support structure 1.
- the furnace temperature is, for example, in the range of about 120 to 250 ° C., more preferably in the range of about 180 to 190 ° C.
- the heating time is, for example, about 40 to 120 seconds.
- a heat-insulating case that covers only the frame member 3 is used and heat treatment is performed in a heating furnace with only the film 2 exposed, the frame member 3 is restrained. It is possible to heat only the film 2 while being shielded against heat.
- a cooling water channel through which the cooling water flows may be formed in the heat insulating case, and the temperature around the frame member 3 may be actively lowered.
- the heating time in the tension application treatment of the film 2 is not preferable because spots are generated at a heating plate temperature of 200 ° C. for 30 seconds or less, and about 45 seconds was appropriate. Even if it exceeds 45 seconds, the productivity is deteriorated.
- the mesh tension is required to be 12 mm or less when the 2 kg weight is placed. However, when heated at 200 ° C. for 45 seconds, it falls within the range of 6-7 mm. It was.
- the elastic yarn that is in strong contact with the film in a heating time of 35 seconds changes color, so that it is less than 220 ° C., preferably in the range of 200 ° C. to 190 ° C. Turned out to be.
- the sample A to be evaluated is composed of a warp 10 composed of two strands made by twisting polyester yarn having a thickness of 300 denier and a woven fabric woven in a mesh shape with a weft 11, and further, the warp 10 and the weft 11 In this way, monofilaments of elastomeric polyester yarn having a thickness of 1850 denier in both the longitudinal direction and the transverse direction are woven so as to be arranged in a lattice pattern so as to pass through the mesh eyes 9 that are woven.
- Sample B to be evaluated was used for the seat of the chair shown in FIG. 1. As shown in FIG.
- the sample B was the same as the warp yarn 10 consisting of five strands 12 formed by twisting polyester yarn having a thickness of 300 denier. It is composed of a fabric woven in a mesh shape with two strands 12 of polyester yarns and three monofilaments of an elastomeric polyester yarn 13 having a thickness of 1850 denier and further meshed at the front edge 2a. -The stitches are stuffed.
- a seat having these evaluation target samples A and B as a film was prepared, and the film was stretched by heating at a heating plate temperature of 200 ° C. for 45 seconds using the apparatus shown in FIGS.
- the curvature of the curved surface gradually changed with distance from the both sides of the frame member in the curved portion of the front edge portion, and a curved surface that was most concave in the center in the lateral direction was formed.
- the curved surface portion of the front edge portion has no dent in the lateral direction, the curvature of the same curvature not only on the both sides of the frame member but also in the vicinity of the lateral center away from it. A surface was formed.
- a mesh shrinkage rate evaluation test was performed for the samples A and B to be evaluated.
- the evaluation test was a mesh of the front edge portion 2a of the seat, and three sample pieces each having a size of about 100 ⁇ 100 mm were prepared, and hot air at 190 ° C. was applied for 110 seconds. And the shrinkage
- the results of the evaluation test are shown in Table 1. From this result, in the sample A to be evaluated, the vertical shrinkage rate was about 87% with respect to the horizontal shrinkage rate, and the vertical shrinkage rate and the horizontal shrinkage rate were almost the same.
- the lateral thread linearly connects the side edges 3a on the side of the frame member 3, and the amount of displacement in the depth direction (Z-axis direction) is zero.
- the longitudinal yarn has a large amount of displacement in the depth direction (Z-axis direction) (see FIG. 3), and if there is no lateral yarn, the shortest distance connecting both ends is slanted. It will be stretched linearly. For this reason, in the case of the sample A to be evaluated, in which the shrinkage rate in the vertical direction and the horizontal direction hardly change, the vertical yarn is constrained by the horizontal yarn tension near the side 3 a on the side of the frame member 3.
- the vertical shrinkage and the horizontal shrinkage are different.
- the vertical shrinkage was about 40% with respect to the horizontal shrinkage.
- the curved surface of the membrane 2 near the front edge 2a is The curved surface having the same curvature was formed not only near the side 3a on the side of the frame member 3 but also near the center in the lateral direction away from the side 3a.
- the body support surface 4 along the shape of one side of the Y-axis direction or the X-axis direction of the frame member 3 is configured as the difference in contraction rate between the vertical direction and the horizontal direction of the membrane 2 increases. it can. That is, it has been found that the shape of the body support surface 4 can be brought closer to a more preferable shape by bringing the shape of the frame member 3 closer to the intended three-dimensional shape.
- the optimum value of the shrinkage rate required for the mesh material can vary depending on the shape of the chair and the elastic force required for the surface formed by the membrane 2, and is not necessarily limited to the above example.
- the present invention has been described by taking as an example a body support structure mainly configured as a seat or a back.
- the present invention is not particularly limited thereto, and is also applicable to a headrest or an armrest.
- the chairs to which the present invention can be applied are general chairs such as general chairs, office chairs, work chairs, and nursing chairs.
- the chair according to the present invention can be used as the seat or the backrest of the body support structure 1 as it is, but depending on the case, a skin member is attached from above or a cushioning material is used in combination. You may make it do.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
2 膜
2a 膜の前縁部付近の曲面
3 枠部材
4 身体支持面
5 座
5a 枠部材の前縁部付近の湾曲部
6 背
8 椅子
10 経糸
11 緯糸
12 ポリエステル糸(ストランド)
13 エラストマー糸(モノフィラメント)
34,35 加熱板
42 熱流体を噴き出すダクト
Claims (16)
- 膜によって身体支持面を形成する身体支持構造物を備える椅子において、前記身体支持構造物は互いに直交する縦方向、横方向並びに深さ方向の3軸方向に展開する三次元の身体支持面を形作る三次元形状の枠部材と、無張力下あるいは身体支持面として要求される張力よりも弱い張力で前記枠部材に周縁部分が固定されると共に前記縦方向と前記横方向とで熱収縮率が異なり、尚且つ固定後の加熱による熱収縮によって前記身体支持面として必要な張力が与えられる膜とを有し、前記膜の熱収縮の際の発生張力の差によって前記枠部材の形状に沿った三次元的な身体支持面を形成したものであることを特徴とする膜によって身体支持面を形成する身体支持構造物を備える椅子。
- 前記膜は、前記縦方向と前記横方向のうち、深さ方向への変位量が小さい側の方向が深さ方向への変位量が大きい側の方向よりも収縮率が高く、前記縦方向と前記横方向との熱収縮の際の発生張力の差によって前記枠部材の三次元形状に沿って全体が縮むことで三次元的な前記身体支持面を形成することを特徴とする請求項1記載の椅子。
- 前記膜は熱収縮性の経糸と緯糸で織られた織物であり、前記織物を構成する熱収縮性の糸より熱収縮率が高いエラストマー糸を織り込むことにより、当該膜の縦横で収縮率を異らせたものである請求項1記載の椅子。
- 前記経糸あるいは緯糸のいずれか一方の糸として前記エラストマー糸が織り込まれたものである請求項3記載の椅子。
- 前記エラストマー糸が前記経糸及び前記緯糸として織り込まれたものである請求項3記載の椅子。
- 前記織物を構成する前記経糸及び前記緯糸とは別に、前記経糸あるいは緯糸のいずれか一方の糸に沿って前記エラストマー糸を織り込むことにより、当該膜の縦横で収縮率を異らせたものである請求項3記載の椅子。
- 前記織物を構成する前記経糸及び前記緯糸とは別に、前記経糸及び緯糸の双方の糸に沿って前記エラストマー糸を織り込むことにより、当該膜の縦横で収縮率を異らせたものである請求項3記載の椅子。
- 前記膜は熱収縮性の糸で編まれた編物であり、前記編物を構成する熱収縮性の糸より熱収縮率が高いエラストマー糸をコース方向に挿入して編み込むことにより、当該膜の縦横で収縮率を異らせたものである請求項1記載の椅子。
- 前記織物は、同一加熱温度下での熱収縮率が同じ経糸と緯糸とで織られたものである請求項3記載の椅子。
- 前記織物は、同一加熱温度下での熱収縮率が異なる少なくとも2種の弾性素材を経糸と緯糸とで織られたものである請求項3記載の膜によって身体支持面を形成する身体支持構造物を備える椅子。
- 前記エラストマー糸は前記身体支持構造物の部位に応じて配置密度が異なるものである請求項3記載の椅子。
- 前記身体支持構造物は座であり、前記膜の前縁側の三次元面形状部分のエラストマー糸を他の領域よりも多く配置したことを特徴とする請求項11記載の椅子。
- 前記身体支持構造物は背であり、前記膜のランバーサポート部の三次元面形状部分のエラストマー糸を他の領域よりも多く配置したことを特徴とする請求項11記載の椅子。
- 前記織物はメッシュ状であり、前記枠部材との境界付近を含む周縁部分の織目が、それよりも内側の部分よりも細かくすることを特徴とする請求項3記載の椅子。
- 前記編物はメッシュ状であり、前記枠部材との境界付近を含む周縁部分の編目が、それよりも内側の部分よりも細かくすることを特徴とする請求項8記載の椅子。
- 前記膜は熱流体が吹き付けられることで加熱されて張力が付与されたものである請求項1記載の椅子。
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JP2015506361A JP6002315B2 (ja) | 2013-03-21 | 2013-03-21 | 事務用椅子 |
PCT/JP2013/001922 WO2014147663A1 (ja) | 2013-03-21 | 2013-03-21 | 事務用椅子 |
US14/002,077 US9462891B2 (en) | 2013-03-21 | 2013-03-21 | Office chair |
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US (1) | US9462891B2 (ja) |
JP (1) | JP6002315B2 (ja) |
WO (1) | WO2014147663A1 (ja) |
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US10874220B2 (en) | 2015-01-16 | 2020-12-29 | Herman Miller, Inc. | Zoned suspension seating structure |
US11825957B2 (en) | 2015-01-16 | 2023-11-28 | MillerKnoll, Inc. | Zoned suspension seating structure |
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JP2019063176A (ja) * | 2017-09-29 | 2019-04-25 | コクヨ株式会社 | 椅子 |
JP7029044B2 (ja) | 2017-09-29 | 2022-03-03 | コクヨ株式会社 | 椅子 |
Also Published As
Publication number | Publication date |
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US9462891B2 (en) | 2016-10-11 |
US20150173514A1 (en) | 2015-06-25 |
JPWO2014147663A1 (ja) | 2017-02-16 |
JP6002315B2 (ja) | 2016-10-05 |
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