JP3855235B2 - Seat support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat support used when sitting on an automobile seat or the like.
[0002]
[Prior art]
Because car seats are tailored to the average user's physique, they may not fit well for the individual user when sitting on the seat. In particular, when sitting on the seat, there is a space between the back of the seat and the back of the seat, and the waist is forced to be pushed while driving from where the waist is not firmly supported, which also causes back pain ing.
[0003]
Applicants have previously formed a molding material that supports, holds, and holds the head from below during radiation therapy, and the required amount of granular material coated with a moisture-curable urethane prepolymer is made of a water-permeable material. A wrapped molding material was provided (Patent Document 1).
In this case, the mold can be made well by moving the granules, but if it is unfamiliar with the back of the seat, the granules move down before trying to take the mold. There were some points that were difficult to use.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-224796
[Problems to be solved by the invention]
The present invention further improves the above-mentioned molding material previously provided by the applicants, makes it easier to use as a seat support, prevents the granular material from moving downward due to its own weight during molding, Molding is performed in accordance with the shape of the body, and an object capable of reliably supporting a seated person by such a molding material is obtained.
[0006]
[Means for Solving the Problems]
The present invention wraps a required amount of the surface of a large number of granular materials coated with a water-curable resin with a water-permeable coating material, and stores such a molding material in a cover body having self-supporting and shape-retaining properties, A sheet support that can maintain the molding material in a uniform and easy-to-mold state during molding. The granulates are connected by an uncured water curable resin, but the granules can move relative to each other so that they can be adapted to the shape to be molded at the same time.
[0007]
When this seat support is stood against a backrest of an automobile seat or the like, the granular material coated with the uncured water-curable resin of the molding material tends to move downward, but the molding material is accommodated. Since the cover body is provided with self-supporting property and shape retention, it acts to moderately regulate the movement of the granular material downward, and the granular material maintains an average thickness. .
[0008]
Therefore, when seated on the seat, the granular material in the molding material wrapped in the cover body moves in accordance with the unevenness of the body and deforms into a shape suitable for the outer shape of the body. And since the water-curable resin that binds such a large number of particles reacts with moisture and hardens and maintains a fixed shape, the body is securely held, and a good and stable sitting comfort can be obtained. it can.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The granular material 1 in the present invention is preferably one that does not react with the uncured water curable resin or one that has been processed so as not to react. These include polyethylene, polypropylene, polystyrene, acrylic resins and other organic materials, and glass, slag and other inorganic materials.
[0010]
The granular material can be formed into a spherical shape, a short rod shape, a cube shape, a rectangular parallelepiped shape, a disk shape, or other shapes, and it is often preferable to have a rounded shape. Moreover, this granular material can be formed hollow, solid, or formed into a foam. In the case of a foam, it is preferable to use a closed cell that does not allow the water curable resin to permeate, and it is particularly preferable to have a skin layer on the surface. In the case where the holes are on the surface, the holes may be treated so as to close the holes.
[0011]
The size of the granule is appropriately determined depending on moldability, flatness obtained after the resin is cured, air permeability, and the like. The size may be about 8 cm ³ or less, preferably about 0. easy to use and to .125cm ³ below. In some cases, it is preferable to use two or more kinds of the granular materials having different materials, properties, shapes, sizes, and the like.
[0012]
The water curable resin 2 is coated on the surface of the granular material 1 to connect a large number of granular materials so that the granular materials can move together. As such a water curable resin, a water curable urethane prepolymer, a water curable silicone resin, or other resins can be used.
The water-curable urethane prepolymer is a prepolymer having an isocyanate group at a terminal obtained by a reaction between a polyol and a polyisocyanate.
The viscosity of such a resin is about 10 to 2000 ps, preferably about 50 to 1000 ps at 20 ° C.
[0013]
As the granular material 1, one having moderate elasticity can be used. For example, olefinic granular materials such as polyethylene, polypropylene and copolymers thereof that have been given elasticity with softeners and plasticizers, vinyl acetate copolymers, polyvinyl chloride, and polystyrene that give elasticity or elasticity. Etc., there are granules formed of neoprene, polybutadiene, silicone or other rubber-based materials.
[0014]
The hardness of the material forming the elastic granular material is 25% compression hardness of about 2 kg / cm ² or less, preferably about 1.0 kg, according to the hardness test (JIS K6401 5.4) of the soft urethane foam for cushions. / Cm ² or less. The compressive residual strain (JIS K6401 5.5) is about 15% or less, preferably about 13% or less.
For example, Cosmogel (trade name, manufactured by Cosmo Keiki Co., Ltd.), Alpha Gel (trade name, manufactured by Geltech Co., Ltd.), Pef (trade name, manufactured by Toray Industries, Inc.), neoprene rubber (Yamamoto) Chemical Industry Co., Ltd.).
[0015]
When the above-mentioned granular material has elasticity, it is often preferable that the cured water-curable resin also has elasticity. In the seat support using both the granular material and the cured water-curable resin that has elasticity, the body can be securely held, and it has moderate cushioning properties. May be easier to use.
[0016]
The elasticity of the water-curable resin having elasticity after the above curing was measured by the following method.
(Measurement method) Using a film coater (FILMCOATER) P1-1210 (manufactured by Tester Sangyo Co., Ltd.), apply a water curable resin to a thickness of 100μ on the release paper, and let stand at room temperature for 24 hours to cure. Let After curing, the specimen is cut into a size of 25 × 200 mm. Using this sample, using Autograph 500D tester (manufactured by Shimadzu Corporation), under the condition of a tensile rate of 10 mm / min, a gripping distance 100 mm, measuring the tensile strength at the time of elongation was 25%, cm ² Converted per hit.
The cured water-curable resin preferably has a tensile strength (at 25% elongation) of about 15 kg / cm ² or less, preferably about 5 kg / cm ² or less as measured by the above measurement method.
[0017]
Each of the above water-curable resins is provided with a catalyst, a stabilizer, an antifoaming agent, an antioxidant, a colorant, thixotropic properties in consideration of curing time, storage stability, acceleration of defoaming during curing, and finished state Agents, fillers, and the like can be appropriately used from known compounds depending on the components of the water curable resin.
[0018]
The mixing amount of the water curable resin with respect to the granular material is about 2 to 30% by volume, preferably about 10 to 30% by volume of the granular material. Moreover, when performing by weight, it is good to use about 7.5g or more of resin per liter of volume of a granular material, Preferably it is good to use about 45-420g.
[0019]
The granular material and the water curable resin are preferably used in an environment of 20 ° C. and a relative humidity (RH) of 20% or less, using a universal mixer or other mixer, filling the mixer with dry nitrogen gas, and a predetermined amount It is preferable to add a predetermined amount of a water-curable resin while stirring and stirring until it becomes uniform.
[0020]
The mixture of the granular material and the water curable resin is such that the surface of the granular material is covered with the water curable resin in an amount sufficient to connect the granular materials. Although they are connected together by an uncured water curable resin, they are in a single unit, but the granular materials are in a state where they can move relative to each other.
[0021]
The mixture of the granular material 1 and the water curable resin 2 is wrapped in a required amount by a coating material 3, which is non-reactive with the water curable resin 2 and has a low water content. A knitted fabric, a woven fabric, a non-woven fabric, or the like that is water-based and breathable and easily deforms along the unevenness of the body may be used. Preferably, the mixture is placed in a bag shape.
Examples of the material of the covering material 3 include polyester, polypropylene, polyethylene, polyurethane, SIS, and others.
[0022]
The molding material 4 in which the mixture 1 of the granular material 1 and the water curable resin 2 is wrapped with the covering material 3 is used because the water curable resin is naturally cured by the moisture in the air if left alone. If it is sealed in a moisture-proof bag 5 in which aluminum foil or the like is used together, it can be stored stably.
[0023]
The molding material 4 in which the mixture is wrapped with a covering material is accommodated in a cover body 6. This cover body has a necessary size so that it can be adapted to a portion where the body is desired to be held when seated on a seat such as an automobile, and the granular material in the molding material 4 moves by its own weight and becomes unevenly distributed. To prevent that.
[0024]
Such a cover body 6 is a cloth-like material 7 such as a woven fabric, a knitted fabric, a mesh sheet, a non-woven fabric or other cloth body, or a product obtained by processing these using a resin or rubber, and the cloth-like material is deformed. It can be formed by using a material that has tension in itself so that it can be easily restored even if it is folded. The materials include polyester, polypropylene, polyethylene, polyacryl, polyurethane, styrene / isoprene / styrene copolymer (SIS), polyamide and other synthetic fibers, rayon, sufu, cotton, hemp and other recycled fibers and natural fibers. Or it can use together.
[0025]
In the 8-cover body 6 in which the two cloth-like objects 7 are sewn together at the periphery, the self-supporting property and the shape-retaining property can be obtained depending on the properties of the cloth-like object itself. Since the movement of the mixture in the molding material 4 is also restricted, even if the seat support is carried or placed against the backrest 22 of the seat 21, the granularity in the molding material 4 can be reduced. The body mixture does not fall down and accumulate underneath, and can maintain an average thickness.
[0026]
As shown in FIG. 3, the cover body 6 can be provided with a sheet body 10 on at least one surface of the cloth-like material 7. Examples of the sheet 10 include foam sheets such as polyurethane, silicone, polystyrene, polyethylene, polypropylene, chloroprene rubber, and natural rubber, gel sheets such as silicone and urethane, and foam sheets of the gel. Can be used. As such a gel body, the above-described cosmogel (trade name), alpha gel (trade name) or other gel body may be used.
The sheet body 10 attached to the cloth-like material 7 gives the cover body 6 self-sustainability and shape retention, so that the mixture of granular materials in the molding material 4 does not fall down and become unevenly distributed. Can keep the average thickness, almost.
[0027]
In FIG. 3, a foam sheet body 10 having a thickness of about 10 mm is attached to one surface of the cover body 6, and the cover body 6 having a small bead portion 11 is sewn 12 to the periphery thereof. ing. Further, a cloth 23 made of a non-slip material such as cotton having a relatively coarse mesh is attached to the inner surface of the foam 10. In the cover body 6, the sheet body 10 provides self-supporting property and shape retention, but further, the elasticity of the foam makes it difficult for the mixture in the molding material 4 to move by its own weight, resulting in a more uniform thickness. It is easy to hold on.
[0028]
In the above, the foam or gel sheet body 10 is attached to one surface inside the cover body 6, but if it is attached to both surfaces, the molding material 4 accommodated therein is elastically applied from both surfaces. Since it comes to hold | maintain by pressing, it may be still more preferable.
[0029]
Further, the sheet body 10 can be attached separately from the cloth body 7, and the cloth body 7 and the sheet body 10 are laminated or sandwiched and integrated. You can also Such a sheet body 10 is usually preferably positioned on the inner surface side of the cloth-shaped body 7, but may be positioned on the outer surface side depending on circumstances.
[0030]
In addition, as shown in FIG. 4, the cover body 6 has two cloth-like objects 7 stitched together at the periphery 8 and a strong bead portion 14 provided at the periphery, and the bead portion 14 provides two cloth-like shapes. It is possible to pull the object 7 around the circumference, thereby obtaining the self-supporting property and the shape retaining property of the cover body 6 and maintaining the shape.
It is preferable that the bead portion 14 is provided with a strong rod 15 formed of polyethylene, polypropylene, polyamide, or other synthetic resin, which is slightly thick and can be deformed, but can stretch the cloth-like material 7. Many.
[0031]
The cover body 6 has a good touch when it comes into contact with the body as a whole, and is preferably strong and breathable. The peripheral edge of the cover body 6 may be formed by sewing or welding, but an opening 17 through which the molding material 4 can be taken in and out may be provided in a part thereof. The opening 17 can be freely opened and closed with a fastener 18, a hook-and-loop fastener, a hook, a button, or the like.
[0032]
When using this, as shown in FIG. 5, the moisture-proof bag 5 is opened, and the molding material 4 enclosing the mixture of the granular material 1 and the water-curable resin 2 is averaged so as to have an average thickness. Russ. Then, when a small amount of water 20 is sprayed on the surface of the molding material 4, the moisture acts on the water curable resin 2 covering the granular material 1 through the coating material 3, and a reaction for curing this starts. . When the reactivity of the water curable resin in the molding material 4 is high or when it is desired to cure slowly even if the reactivity is not so high, water may not be sprayed. In this case, the water curable resin is gradually cured by the moisture of the outside air.
[0033]
Such a molding material 4 is housed in the cover body 6 from the opening 17 and the fastener 18 is closed. At this time, since the cover body 6 has the self-supporting property and the shape-retaining property as described above, the molding material 4 accommodated in the cover body 6 is sandwiched from both sides, so that the mixture in the molding material 4 is mixed. Movement is also regulated. Even if this seat support is placed against the backrest 22 of the seat 21, the mixture of granular materials in the molding material 4 does not move downward and become unevenly distributed, and the average thickness is maintained. Can be.
[0034]
Therefore, if the user sits on the seat seat 21 and takes the desired posture, the molding material 4 in the cover body 6 is deformed according to the unevenness of the body 23 such as the waist and back, and is between the seat seat. The space will also be blocked and hold it along the shape of the body.
If such a state is maintained, the water curable resin in the molding material 4 reacts with moisture to cure, and the sheet support 19 including the molding material 4 in a state suitable for the shape of the body is formed.
[0035]
When the seat support 19 formed in this manner is seated against the backrest 22 of the seat 21, no space is formed between the seat support 21 and the body is securely held by the seat support 19. And there will be no back pain. In addition, when the seat support is small, it may be easy to use if it is attached or fixed to the backrest 22 of the seat 21 using a hook-and-loop fastener or a string. The seat support can be positioned on the seat side of the seat and can be molded.
[0036]
When using the above-mentioned thing of FIG. 3, if the sheet body 10 side of the foam is on the side in contact with the body, the impact action on the body can be weakened by the foam, but a hard sitting comfort is preferred. In such a case, the side where the foam is not positioned may be in contact with the body.
If the molding material is molded and cured according to the body, the direction in which the molded material is stored in the cover body is changed by directing the molded molding material toward the foam side of the cover body or toward the opposite side. Thus, depending on the case, it can be used in various modes as a seat support with a soft feel or a hard seat support.
[0037]
【Example】
The following ingredients are mixed to make a water curable urethane prepolymer.
PPG2000 780g
MDI 200g
NIAX CATALYST A-1 15g
Irganox 1010 1g
byk-A525 1g
Benzoyl chloride 5g
(Note) PPG2000: Polypropylene glycol with a number average molecular weight of 2000 MDI: 4,4′-diphenylmethane diisocyanate NIAX CATALYST A-1: Mixture of bis (2-dimethylaminoethyl) ether and dipropylene glycol (manufactured by WICO)
Irganox 1010: hindered phenol anti-aging agent byk-A525: silicone antifoaming agent The tensile strength (at 25% elongation) of this water-curable urethane prepolymer after curing was 2 kg / cm ² .
[0038]
As a granular body, a cylindrical “Cosmogel 04” (manufactured by Cosmo Keiki Co., Ltd.) having a volume per one piece of 0.05 cm ³ was used. The granular material had a 25% compression hardness of 0.18 kg / cm ² and a compression residual strain of 2.5%.
170 g of the above water-curable urethane prepolymer was added per 1 liter of the volume of the granular material, and mixed well so as to spread over the entire surface of the granular material.
460 g of the above mixture was put into a 54 cm × 61 cm bag formed with a white net of a covering material (manufactured by Alcare Corporation) to obtain a molding material.
This molding was sealed in a moisture-impermeable aluminum laminate pack.
[0039]
The cover body into which this molding material was put was formed in a rectangular shape by providing an opening having a fastener on one side and attaching a sheet body inside. The details of this cover body are as follows.
Cover fabric: Polyester double raschel knitted fabric, length 56 cm x width 63 cm x thickness 2.9 mm, bending resistance 17.5 mm (JIS L1096 bending resistance 8.19.1 A method), basis weight 352 g / m ²
Sheet body attached inside: Urethane foam (manufactured by Bridgestone, Everlight, 55 cm long x 62 cm wide x 1 cm thick, apparent density 45 kg / m ³ , hardness 157 N)
[0040]
【The invention's effect】
In the present invention, as described above, the mixture of the granular material and the water-curable resin wrapped in a deformable and movable covering material before curing is unevenly distributed by the cover body containing the mixture. Seat support that can be molded according to the unevenness of the waist and back of the body and fits perfectly to the body without holding a space between it and the seat support Can be obtained. The seat support can also be widely used in wheelchairs and other various chairs and seats.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of a molding material placed in a moisture-proof bag according to an embodiment of the present invention.
FIG. 2 is a perspective view of a cover body according to an embodiment of the present invention.
FIG. 3 is an enlarged partial cross-sectional view of a state in which a molding material is stored in a cover body.
FIG. 4 is an enlarged partial cross-sectional view of a state in which a molding material according to a modification of the present invention is housed in a cover body.
FIG. 5 is an explanatory diagram showing a usage state of a seat support.
FIG. 6 is a perspective view of a molded sheet support.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Granule 2 Water curable resin 3 Coating material 4 Molding material 6 Cover body 7 Cloth-like material 10 Sheet body 14 Durable bead part 19 Seat support 21 Seat seat 22 Backrest

Claims (5)

  It has a required amount of granular material and a water-curable resin, and the granular material is coated and connected with the water-curable resin to form a united body that can be moved, and this united body is made of a water-permeable coating material. Wrapped to be a molding material that can be molded and cured to fit the outer shape of the seated person, and can be easily deformed or folded so that the above-mentioned unitary body of the molding material can be maintained in a uniform state that is easy to mold. A cover body provided with a bead portion formed of a cloth-like material having a tension on itself that can be restored to the shape, and a deformable and strong synthetic resin rod arranged on the periphery thereof so that the cloth-like material can be maintained in a stretched state. A sheet support containing the above molding material.   The sheet support according to claim 1, wherein a sheet body formed of a sheet-like foam or gel body is attached to at least one surface of the cloth-like material of the cover body.   The sheet support according to claim 1 or 2, wherein the granular material is formed of a small spherical foam.   The sheet support according to claim 1, wherein the water curable resin is a water curable urethane prepolymer.   The sheet support according to any one of claims 1 to 4, wherein the granular material has elasticity, and the water-curable resin has elasticity even after curing.

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