JP2009050344A - Elastic body supporting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a body pressure dispersion type elastic body supporting apparatus preventing the concentrated application of a reaction force from elastic clothes. <P>SOLUTION: A plurality of elastic clothes 21 and 22 are superposedly stretched between opposite frames 12a and 12b of this body supporting device with an air layer of a predetermined thickness interposed therebetween. The lower-layer elastic cloth 22 is stretched by tensing it more strongly than that of the surface-layer elastic cloth 21. A cushion pad 24 is contractedly inserted in the air layer 23 between a forefront surface elastic cloth and a lower-layer elastic cloth. The water retention rate of the cushion pad is set to 200% or less, its elastic recovery rate from compression is set to 90% or more, and the pushing pressure under 50% compression is set to 0.003-0.70 N/cm<SP>2</SP>. Tensile stress in 10% elongation of the forefront surface elastic cloth and the lower-layer elastic cloth is set to 15-600 N/5 cm. The cushion pad is molded into a three-dimensional netted structure with a ventilation rate of 100 cc/cm<SP>2</SP>*sec or more which is fusion-bonded by entangling elastic filaments with the fineness of 100 dtex or more. Preferably, polyether-based ester elastomer is used as the elastic filament 25. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a frame and a frame of a body support device used indoors, outdoors, in a car, etc. for supporting a body such as a seat, chair, stool, backrest, leg rest, seat, sofa, bed, etc. The present invention relates to an elastic body support device in which an elastic fabric is stretched between them to constitute a cushion surface such as a seating surface or a backrest surface that elastically supports the body.

  A body support device product is known in which a plurality of elastic fabrics are stretched between layers facing each other with an air layer having a required thickness interposed therebetween (see, for example, Patent Document 1).

  When the elastic fabric is stretched over the hard face material, a cushioning material is provided between the elastic fabric and the hard face material so that the elastic fabric does not strike strongly against the hard face material even if the elastic fabric sinks deep due to body pressure. A body support apparatus product in which is inserted is also known (see, for example, Patent Document 1).

  Resin foam composed of resin cell walls surrounding countless cell cells such as foam rubber, polyurethane foam, etc., fiber laminated web on which synthetic fibers having a fineness of 30 dtex or less are deposited (for example, see Patent Document 2), resin polymer resin wire A double raschel in which a three-dimensional network structure in which strips are intertwined (for example, see Patent Document 3), warp knitted fabrics on the front and back sides are connected with connecting yarns, and an air layer is formed between the front and back warp knitted fabrics. A three-dimensional knitted fabric (for example, refer to Patent Document 4) is known as a cushion material.

JP 2003-189981 A Japanese Patent No. 3610405 (Japanese Patent Laid-Open No. 09-173672) Japanese Patent No. 36677881 (Japanese Patent Laid-Open No. 09-31430) Japanese Patent No. 3472732 (Japanese Patent Laid-Open No. 2001-089959)

The elastic fabric stretched on the cushion surface of the elastic body support device so that the bowstring receives a concentrated stress from the arrowhead and bends in a V shape, and the arrowhead is sandwiched between the bowed strings. The body receiving portion that is placed on the body and sinks together with the elastic fabric receives a reaction force from the elastic fabric and is pressed so as to be sandwiched from the periphery of the depression formed in the elastic fabric.
In a receiving part that is recessed like a buttock, the reaction force does not act on the recessed receiving part because it does not contact the elastic fabric, and the reaction force from the elastic fabric concentrates around the recessed receiving part. A strong reaction force acts on the surrounding area as long as it does not act on the recessed receiving part.

  In a body support apparatus product (for example, see Patent Document 1) in which a plurality of elastic fabrics are stretched with an air layer having a required thickness interposed therebetween, the reaction force received from the elastic fabrics increases or decreases according to body weight, Even if the weight is light, the reaction force received is small, and even if the cushion surface feels soft, it is only the surface elastic fabric that touches the body's to-be-received part, so even if multiple elastic fabrics are stretched In the recessed receiving portion, the strong reaction force from the elastic fabric acts on the periphery of the receiving portion, and the body pressure transmitted from the body is hardly evenly distributed on the elastic fabric.

  In the body support device product (for example, refer to Patent Document 1) in which a cushion material is inserted between the elastic fabric and the hard face material, the elastic cloth sinks greatly and hits the hard face material. When the air layer between the elastic fabric and the hard face material is thin, the cushion material is not used for cushioning, and when the air layer between the elastic fabric and the hard face material is thick, there is a risk of hitting the hard face material. Therefore, there is no meaning to insert the cushion material, and the hard face material is only used as a support member for the cushion material, and is a member unrelated to the elastic fabric.

Therefore, the present invention provides an elastic fabric that is pressed against the body receiving part without causing the string to be bent in a V shape under the stress concentrated by the arrowhead, and the undulating deformation according to the undulation of the body receiving part. The first object of the present invention is to prevent the body pressure from the body receiving portion from being evenly distributed on the elastic fabric so that the reaction force from the elastic fabric does not concentrate and act strongly on the body.
The second object of the present invention is to prevent a feeling of collision as if it was placed on a hard face material when the body receiving part is placed on an elastic fabric stretched between the frames. is there.
The third object of the present invention is to reduce the concentration reaction force from the elastic fabric stretched between the frames and the collision feeling received from the elastic fabric, so that the cushioning material can be used as an elastic body without impairing the function of the elastic fabric. It is to be effectively used for the cushion surface of the support device product.
A fourth object of the present invention is to obtain an elastic body support device that is functionally excellent, simple in design, and easy to use.
Another object of the present invention is to obtain an elastic body support device that is easy to recycle.

The elastic body support device according to the present invention is: (a) A plurality of elastic fabrics 21 and 22 sandwich an air layer 23 having a required thickness between the frames 12a and 12b of the body support device 11 facing each other. It is stretched over and over,
(B) From the surface layer elastic fabric 21 on the outermost surface and the air layer 23 between the lower layer elastic fabric 22 and the distance G between the surface layer elastic fabric 21 and the lower layer elastic fabric 22, that is, the thickness G of the air layer 23 The cushion pad 24 with a thickness H is compressed and inserted,
(C) A hanging thread is sewn on the diagonal corner of a rectangular test piece with a side of 20 cm collected by cutting the cushion pad 24, and the weight (A) of the test piece is measured and immersed in water. The test piece is pulled up from the water by removing the air inside the test piece, and the test piece is hung by hanging the hanging thread on the hanger within 1 minute after being lifted from the water. Cushion measured by measuring the weight (B) of the piece and dividing the difference (B−A = C) between the weight (B) after immersion and the weight (A) before immersion by the weight (A) before immersion. The water retention rate (ρ = 100 × C / A) of the pad is 200% or less,
(D) A circular test piece having a diameter of 10 cm collected by cutting the cushion pad 24 is placed on a horizontal table surface, a 10 cm diameter disk is superimposed on the test piece, and the test piece is 50%. Compress and hold horizontally for 30 minutes, deweigh and hold horizontally for 10 minutes, and the thickness (Q) of the test piece at the time when 10 minutes have passed after the weight was removed is the thickness of the test piece before compression (P ), The cushion pad compression elastic recovery rate (ε = 100 × Q / P) is 90% or more,
(E) The pressing force when the test piece is compressed by 50% by applying the head of a load measuring device having a circular pressing surface with a diameter of 10 cm to a circular test piece with a diameter of 10 cm collected by cutting the cushion pad 24 is 0. 0.03 to 0.70 N / cm ² ,
(F) The elongation stress at the time of 10% elongation of the surface elastic fabric 21 and the lower elastic fabric 22 in the direction in which the frames 12a and 12b facing each other are 15 to 600 N / 5 cm,
(G) The first characteristic is that the lower elastic fabric 22 is tensioned more strongly than the surface elastic fabric 21.

In addition to the first feature, the second feature of the elastic body support device according to the present invention is:
The cushion pad 24 is composed mainly of a three-dimensional network structure having an air permeability (JIS-L-1096A method) of 100 cc / cm ² · sec or more by entwining elastic filaments 25 having a fineness of 100 dtex or more,
(Li) The water retention of the three-dimensional network structure is 50% or less,
(Nu) The water retention rate of the entire cushion pad 24 including the three-dimensional network structure is 100% or less.

  The third feature of the elastic body support device according to the present invention is that, in addition to any of the first and second features, (e) the material of the surface elastic fabric 21, the lower elastic fabric 22, and the cushion pad 24 is It is a polyester polymer.

The fourth feature of the elastic body support device according to the present invention is that, in addition to any of the first, second, and third features, the cross section of the frame 12 on which the elastic fabrics 21 and 22 are stretched. Dovetail grooves 13a and 13b extending in the length direction of the frame 12 are provided at both left and right ends of the
(F) The surface elastic fabric 21 has its edge 15 inserted into the dovetail groove 13a on the outside of the facing frame 12 and locked, and the upper surface of the frame 12 is bent and stretched between the facing frames 12a and 12b. Has been
(Iv) The lower elastic fabric 22 is in the point that the end edge 16 is inserted and locked into the dovetail groove 13b inside the frame 12 facing each other, and is stretched between the frames 12a and 12b facing each other.

  In the present invention, even if the surface elastic fabric 21 is relaxed compared to the lower elastic fabric 22, the air layer 23 between the surface elastic fabric 21 and the lower elastic fabric 22 has a thickness H higher than the layer thickness G. Since the cushion pad 24 is compressed and inserted, even if the surface elastic fabric 21 is further relaxed in long-term use, it is swollen by receiving the pressing force from the cushion pad 24, so that the surface elastic fabric 21 is loosened. No wrinkles occur.

  Since the surface elastic fabric 21 is relaxed compared to the lower elastic fabric 22 and is elastically pushed up by the lower elastic fabric 22 via the cushion pad 24, body pressure from the body receiving portion acts. When the surface elastic fabric 21 is depressed so as to form the skin of the cushion pad, and when the body elastic force 21 acts and the surface elastic fabric 21 is depressed, the tension generated in the surface elastic fabric 21 acts and the body is covered. When the receiving portion is supported and the body elastic force is further exerted and the surface elastic fabric 21 is depressed, the tension generated in the lower elastic fabric 22 acts via the cushion pad 24, and the sinking amount of the surface elastic fabric 21 falls within a certain range. It is suppressed and the body is supported stably.

Thus, when the body receiving portion is placed on the cushion surface 18 of the body support apparatus product 11, the tension from the surface elastic fabric 21 is not immediately transmitted to the body, and the compression elastic reaction force from the cushion pad 24 acts. The feeling of collision received by the body receiving portion from the cushion surface 18 is instantly eased.
Since the reaction force received from the cushion surface 18 generated by placing the body receiving part on the body is gradually felt stronger, the first feel received on the cushion surface 18 at the start of use is soft, and the surface elastic fabric 21 is used for a long time. And the lower elastic fabric 22 are double elastically supported, so that a comfortable elastic body support device 11 can be obtained.

In order for the body pressure to act so strongly that the surface elastic fabric 21 is depressed and then the cushion pad 24 is depressed and then the lower elastic fabric 22 is depressed and tension is generated, the cushion pad 24 is pressed at 50% compression. The pressure should be weak.
However, in order for the surface elastic fabric 21 to be pushed up by the cushion pad 24 to expand and deform according to the undulations of the body receiving portion, the pressing force of the cushion pad 24 at 50% compression is: Stronger is better.
Considering these points, the cushion pad 24 is adjusted so that the pressing force at 50% compression is 0.04 to 0.40 N / cm ² , preferably 0.06 to 0.30 N / cm ^2. It is desirable to design.

  The surface elastic fabric 21 is relaxed as compared with the lower layer elastic fabric 22, and the compression elastic reaction force from the cushion pad 24 that has been compressed and stored the elastic recovery force is constantly acting on the surface elastic fabric 21. When body pressure is applied from the body receiving part, the surface elastic fabric 21 is deformed along the undulations of the body receiving part by the compressive elastic reaction force from the acting cushion pad 24, and the body receiving part Since the body pressure from the receiving part is easily dispersed in the surface elastic fabric 21, the elastic body support device 11 that does not cause pain or induce pressure ulcers during long-term use can be obtained.

Since the cushion pad 24 used in the present invention has an air permeability of 100 cc / cm ² · sec or more and a water retention rate (ρ) of 200% or less, it feels stuffy from the cushion surface 18 when used for a long time. There is no.

The cushion pad 24 in which elastic filaments 25 having a fineness of 100 dtex or more are intertwined to form a three-dimensional network structure has a specific surface area smaller than that of a resin foam or fiber laminated web having the same bulk density and mass as the cushion pad 24. Since a large gap can be formed, the water retention rate can be lowered, the air permeability is good, and the stuffiness is not given.
And in the cushion pad 24 in which the elastic filaments 25 having a fineness of 100 dtex or more are intertwined to form a three-dimensional network structure, the elastic filaments 25 that constitute the resin cell wall constituting the resin foam and the fineness of 30 dtex or less constituting the fiber laminated web. Because it is stiffer than the synthetic fiber, the compression elastic reaction force acting on the surface elastic fabric 21 is also strong, and when body pressure is applied from the body receiving portion with the undulation, it follows the undulation of the body receiving portion. Then, the surface elastic fabric 21 is deformed, and the body pressure dispersion type elastic body support device 11 is obtained.

  When the material of the surface elastic fabric 21, the lower elastic fabric 22, and the cushion pad 24 is a polyester polymer, it is not necessary to separate the materials when the elastic body support device 11 is discarded, and it is easy to recycle.

  In the present invention, since the dovetail grooves 13a and 13b are provided at the left and right ends of the frame 12 on which the elastic fabrics 21 and 22 are stretched, the edge 15 of the surface elastic fabric 21 is inserted into the dovetail grooves 13a outside the frame 12 facing each other. The surface elastic fabric 21 can be stretched between the frames 12a and 12b facing each other by engaging and bending the upper surface of the frame 12. The lower elastic fabric 22 has an edge 16 on the inner side of the frame 12 facing. By inserting and locking into the dovetail groove 13b, it can be stretched between the frames 12a and 12b facing each other, and since the structure of the frame is simple, a novel elastic body support device product 11 excellent in design can be obtained. .

FIG. 1 illustrates a chair according to the present invention. A frame 12 for stretching elastic fabrics 21 and 22 has an elliptical cross section, and dovetail grooves 13a and 13b are provided on both left and right ends of the long axis X. The two semicircular cavities 14a and 14b that are bilaterally symmetric about the minor axis Y are provided symmetrically with respect to the major axis Y.
A bag-like groove hole is provided in each of the edges 15 and 16 of the surface elastic fabric 21 and the lower elastic cloth 22, and the shaft member 17 is inserted into the bag-like groove hole at the edge inserted into the dovetail groove 13 of the frame 12. Then, the bag-like groove hole is expanded by the shaft member 17 and is closely fitted into the dovetail groove (13), so that the end edges 15 and 16 of the surface elastic fabric 21 and the lower elastic fabric 22 are secured to the frame 12. It is locked.

The elastic filament 25 of the cushion pad 24 having a three-dimensional network structure can be made of rubber or plastic having rubber elasticity.
In order to form the cushion pad 24 having a three-dimensional network structure with rubber, the elastic filaments 25 constituting the three-dimensional network structure are extruded using unvulcanized rubber, deposited while curled, heated and vulcanized to form a three-dimensional network structure. Mold.
In that case, in order to make it easy to maintain the shape of the unvulcanized elastic filament 25, the elastic filament 25 may be formed of unvulcanized rubber using a fiber yarn as a core material like a rubber-coated electric wire.
The rubber used may be natural rubber or synthetic rubber.

In order to form the cushion pad 24 having a three-dimensional network structure by the elastic elastic plastic strip 25, the rubber elastic plastic is heated and melted, and the elastic elastic plastic strip 25 is extruded from the nozzle of the extrusion molding machine. It is good to deposit and cool and solidify.
Then, in the deposition process, the elastic filaments are fused to form a cushion pad 24 having a predetermined three-dimensional network structure.
The rubber elastic plastic may be a polyester elastomer such as a polyether ester elastomer, a polytrimethylene terephthalate elastomer, a polybutylene terephthalate elastomer, a polypropylene terephthalate elastomer, or a polylactic acid elastomer.

For the cushion pad 24, a resin foam, a fiber laminated web, a double raschel three-dimensional knitted fabric, or the like can be used in addition to the three-dimensional network structure in which the elastic filaments 25 are intertwined.
In that case, a resin foam, a fiber laminated web, a double raschel three-dimensional knitted fabric, etc. are used with a rubber elastic elastomer added to increase the compression elastic strength and a water repellent added to keep the water retention rate at 200% or less. .
Incidentally, the resin foam (urethane foam) with a thickness of 35 mm and a vertical and horizontal dimension of 200 mm and a porosity of around 90% has a water retention of around 500%, and the fibers are heat-sealed. The water retention rate of the fiber laminated web called hard cotton / resin cotton is around 400%, and the water retention rate of the three-dimensional network structure in which the elastic filaments 25 having a fineness of around 1500 dtex are intertwined is around 10%.
The cushion pad 24 may be a multilayer structure in which these materials are combined, or may be a material in which these materials are packed in a bag made of mesh fabric or the like.
Therefore, the fiber laminated web having a water retention rate of around 400% can be used for the cushion pad 24 as a cover of a three-dimensional network structure in which the thickness is around 5 mm and the elastic filaments 25 are intertwined.

  The thickness H of the cushion pad 24 having unevenness on one side of the front and back is measured as the thickness from the apex of the convex portion on one side to the other side, and the thickness H of the cushion pad 24 having unevenness on both sides of the front and back is Measured as the thickness from the top of the convex part of the other side to the top of the convex part on the other side.

  A cushion pad in which several kinds of materials are packed in a bag made of mesh cloth or the like cannot be cut and collected as a rectangular test piece having a side of 20 cm. Once taken out, the bag made of the taken out mesh fabric, etc. is prepared into a rectangular bag with a side of 20 cm, and the material corresponding to the rectangular shape with a side of 20 cm of the cushion pad among several types of materials taken out is prepared. The test pad is refilled into a rectangular bag having a side of 20 cm, and the test cushion pad is used as a test piece for a water retention measurement test.

The shape is complicated, such as a donut shape or a horseshoe-shaped cushion pad that has an opening on the inside that can draw an inscribed circle with a diameter of 5 to 15 cm, or a mesh portion with many gaps inside. In the case of a cushion pad in which a rectangular test piece having a side of 20 cm cannot be collected, the cushion pad itself is used as a test piece for a water retention measurement test without cutting.
In the present invention, the size of the test piece used for the measurement test of the water retention rate is a rectangle having a side of 20 cm because the body support device that is the object of the present invention has a cushion surface in a circle with a diameter of 30 cm to 50 cm. In addition to the child and the chair, a sofa or bed whose cushion surface does not fit in a circle with a diameter of 50 cm is also included, so that the size of the test piece used for the water retention measurement test is standardized.
For a large body support device such as a sofa or bed where the cushion surface does not fit in a 50 cm diameter circle, a rectangular test piece with a side of 20 cm may be collected from any part of the cushion pad.

In the present invention, as described above, the water retention rate of the cushion pad 24 is prepared in a rectangular test piece having a side of 20 cm, a hanging thread is sewn on the diagonal corner, immersed in water, and pulled up for 60 minutes. It is calculated by measuring the weight of the test piece when it has elapsed, but in that case, the thickness of the test piece is not considered.
This is because the water retention rate in the present invention is not the water retention rate of materials such as a three-dimensional network structure, a resin foam, a fiber laminated web, and a double raschel three-dimensional knitted fabric used for the cushion pad 24, but the surface elastic fabric 21 and the lower layer elasticity. The water retention rate of the cushion pad 24 used by filling the air layer 23 between the fabrics 22, and the thickness H of the cushion pad 24 and the thickness G of the air layer 23 are a seat chair, a chair, a stool, a backrest, Cushion pad 24 varies depending on the type and specifications of the body support device such as a legrest, a seat, a sofa, a bed, and a combination of materials such as a three-dimensional network structure, a resin foam, a fiber laminated web, and a double raschel three-dimensional knitted fabric. The cushion pad used by filling the air layer 23 between the surface elastic fabric 21 and the lower elastic fabric 22 regardless of the thickness H thereof. If water retention of de 24 200% or less, because its purpose is achieved.

  The lower the water retention rate of the cushion pad 24, the better. Therefore, the water retention rate of the cushion pad 24 using a three-dimensional network structure with a low water retention rate in which the water retention rate is 20% or less and about 10% of the elastic filaments 25 are intertwined. Is recommended to be 50% or less, preferably 20% or less.

The elastic fabrics 21 and 22 include elastic yarns having a breaking elongation of 60% or more, an elastic recovery rate of 15% or more after elongation of 15%, a single fiber fineness of 50 dtex or more, and an elongation stress of 0.1 cN / dtex or more at 10% elongation, For example, a polyether ester elastic monofilament yarn having a single fiber fineness of 50 to 3000 dtex may be used.
For the elastic fabrics 21 and 22, a spun yarn or a multifilament yarn of normal inelastic fiber such as polyester fiber, acrylic fiber, polypropylene fiber, nylon, vinylon, rayon, etc. can be used in addition to the elastic yarn.

The elastic fabrics 21 and 22 may be any of woven fabrics, weft knitted fabrics, warp knitted fabrics, weft inserted warp knitted fabrics, and warp inserted warp knitted fabrics, which have air permeability (JIS-L-1096A method). Weaving and knitting into a porous mesh fabric of 50 cc / cm ² · sec or more.

It is a partially cutaway perspective view of an elastic body support device according to the present invention.

Explanation of symbols

11: Body support device 12: Frame 13: Dovetail groove 14: Semi-circular cavity 15: End edge 16: End edge 17: Shaft member 18: Cushion surface 21: Elastic fabric (surface elastic fabric)
22: Elastic fabric (lower elastic fabric)
23: Air layer 24: Cushion pad 25: Elastic filament G: Distance between the surface elastic fabric and the lower elastic fabric (air layer thickness)
H: Cushion pad thickness X: Short axis Y: Long axis

Claims (4)

(B) A plurality of elastic fabrics (21, 22) are stacked between the frames (12a) and (12b) facing the body support device (11) with an air layer (23) having a required thickness interposed therebetween. Are stretched,
(B) The distance between the surface elastic fabric (21) and the lower layer elastic fabric (22) in the air layer (23) between the outermost surface elastic fabric (21) and the subsequent lower layer elastic fabric (22). A cushion pad (24) having a thickness (H) thicker than (G) is compressed and inserted,
(C) A hanging thread is sewn to the diagonal corner of a rectangular test piece having a side of 20 cm collected by cutting the cushion pad (24), and the weight (A) of the test piece is measured in water. Immerse, remove the air inside the test piece and pull it up from the water. After pulling up from the water, hang the test piece by hanging the hanging thread on the hanger within 60 minutes. The weight (B) of the test piece was measured, and the difference (B−A = C) between the weight (B) after immersion and the weight (A) before immersion was divided by the weight (A) before immersion. The cushion pad has a water retention rate (ρ = 100 × C / A) of 200% or less,
(D) A circular test piece having a diameter of 10 cm collected by cutting the cushion pad (24) is placed on a horizontal table surface, a 10 cm diameter disk is superimposed on the test piece, and the test piece is mounted. 50% compressed and held horizontally for 30 minutes, deweighted and held horizontally for 10 minutes, and the thickness (Q) of the test piece at the time when 10 minutes passed after the weight was removed is the thickness of the test piece before 50% compression. The compression recovery rate (ε = 100 × Q / P) of the cushion pad divided by (P) is 90% or more,
(E) A pressing force when the test piece is compressed by 50% by applying a head of a load measuring device having a circular pressing surface with a diameter of 10 cm to a circular test piece with a diameter of 10 cm collected by cutting the cushion pad (24). Is 0.03 to 0.70 N / cm ² ,
(F) The elongation stress at the time of 10% elongation of the surface elastic fabric (21) and the lower elastic fabric (22) in the facing direction of the frame (12a) and the frame (12b) to be stretched is 15 to 600 N / 5 cm,
(G) An elastic body support device in which the lower elastic fabric (22) is tensioned and tensioned more strongly than the surface elastic fabric (21). (H) The cushion pad (24) is composed mainly of a three-dimensional network structure having an air permeability (JIS-L-1096A method) of 100 cc / cm ² · sec or more by entangled with an elastic filament (25) having a fineness of 100 dtex or more. And
(Li) The water retention of the three-dimensional network structure is 50% or less,
(Nu) The elastic body support device according to claim 1, wherein the entire cushion pad (24) including the three-dimensional network structure has a water retention rate of 100% or less. (E) The elastic body support device according to any one of claims 1 and 2, wherein the material of the surface elastic fabric (21), the lower elastic fabric (22) and the cushion pad (24) is a polyester polymer. (W) Dovetail grooves (13a, 13b) extending in the length direction of the frame 12 are provided at both left and right ends in the cross section of the frame (12) for stretching the elastic fabric (21, 22),
(F) The surface elastic fabric (21) has its end edge (15) inserted into the dovetail groove (13a) on the outside of the frame (12) facing each other and locked to surround the upper surface of the frame (12). Stretched between the frames facing each other (12a, 12b)
(Y) The lower elastic fabric (22) is inserted into the dovetail groove (13b) on the inner side of the facing frame (12) and locked, and stretched between the facing frames (12a and 12b). 4. The elastic body support device according to claim 1, wherein the elastic body support device is provided.

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