JP2007037893A - Body supporting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a body supporting tool which is highly stable in use by improving shape followup ability with a seat or the like when curing a moisture curable resin. <P>SOLUTION: The body supporting tool 1 is used by covering a support part 14 containing many granular bodies 6 coated with the humidity curing type resin with covering members 4 and 5 which can be pressurized and deformed, composing the covering members 4 and 5 of a moisture permeable material, moving the granular bodies 6 with each other by abutting a part the body, turning the support part 14 to a shape matched with the part, and curing the moisture curable resin. For the covering members 4 and 5, the body side covering member 4 to be abutted to the body part and a counter body side covering member 5 are composed of different materials, and the flexibility of the body side covering member 4 is made lower than the flexibility of the counter body side covering member 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a body support device used when sitting on a seat such as a seat or a chair, and in particular, maintains a shape that matches a user's body shape and obtains a fit feeling according to the individual body shape of the user. It is related with the body support tool suitable for.

  Seats such as seats and chairs, for example, various automobile seats, office chairs, wheelchairs, and the like are made to fit the average user, and thus some users may lack fit.

  Therefore, various body holders have been proposed. For example, a predetermined amount of granules coated with a moisture-curing urethane prepolymer is wrapped with a water-permeable material having an opening smaller than the size of the granules, and the water-permeable material wrapped with the powder is impermeable to moisture. There has been proposed a body support device made of a molded body that is hermetically sealed with an adhesive material, and the moisture-curable urethane prepolymer and the moisture-permeable member are non-reactive with each other and have low adhesion (see, for example, Patent Document 1).

  Further, it comprises a required amount of granular material having elasticity and a moisture-curing resin having elasticity even after curing, and the moisture-curing resin is an amount sufficient to connect the particles after curing to the granular material. A body support device is proposed in which a granular body is formed in which the granular bodies can move together so as to follow the shape of the posture to be applied before curing (see, for example, Patent Document 2). ).

Furthermore, the body support device that can support the body reliably and distribute the body pressure to maintain the shape according to the user's body shape and obtain a fit feeling according to the individual body shape of the user Has been proposed (see, for example, Patent Document 3).
Japanese Patent No. 3345545 Japanese Patent No. 3465235 International Publication No. WO03 / 049578A1

  However, the body support device according to the related art according to Patent Documents 1 and 2 described above is deformed by the moisture curable resin being cured after the granular material such as polyurethane foam is deformed according to the body shape of each user. In this state, the granular material is fixed to hold the shape, can support each user's body quickly and accurately, the manufacturing procedure is simple, and it is suitable for holding the head etc. for medical use etc. It was something. However, these body support devices have the following problems for seats in applications where the installation area is limited, such as seats and chairs. That is, these conventional body support devices are fitted to the body by the mutual movement of granular materials such as foamed polyurethane. At this time, the support portion including the granular material fits while being flattened by the pressure of the body. Therefore, the area of the support part increases, and the increase in the area due to the flattening differs depending on the pressure and physique of each user's body, so the shape of the support part becomes irregular, which There is a problem that it cannot be used as it is for a seat such as a seat or a chair in which the size is prescribed.

  In addition, the body support device according to the related art according to Patent Document 3 described above cannot allow the granular material such as polyurethane foam to move well to each part of the body support device when the moisture curable resin is cured. There has been a problem that the shape followability with the seat to be mounted is insufficient. Furthermore, there has been a problem that the appearance shape of the body support device after the moisture curable resin is cured is not necessarily good-looking.

  The present invention has been made in view of the above circumstances, and provides a body support device that improves shape followability with a seat or the like when curing a moisture curable resin and has high stability when used. This is the issue. Another object is to improve the appearance of the body support device after the moisture curable resin is cured.

  According to the first aspect of the present invention, a support portion including a large number of granular bodies coated with a moisture curable resin is coated with a covering member that can be pressed and deformed, and the covering member is made of a material having moisture permeability and applies to a body part. A body support device for use in contact with the body by moving the granular body in contact with each other and curing the moisture-curing resin with the shape of the support conforming to the portion, wherein the covering member is in contact with the body part. The side covering member and the non-body side covering member are made of different materials, and the stretchability of the body side covering member is lower than the stretchability of the anti-body side covering member.

  According to the body support device of claim 1, the covering member is made of a material different from the body-side covering member that contacts the body part and the anti-body-side covering member, and the body-side covering member is more stretchable than the anti-body-side covering member. Because it is made of a low-quality material, when molding a body support device by curing a moisture-curing resin, the granules in the covering member can easily move following the shape of the non-body-side support member such as a seat. It becomes. Therefore, the shape of the anti-body side covering member after molding of the body support device substantially matches the shape of the anti-body side support member such as a seat, and the stability and convenience of use as a body support device are improved. . In addition, the aesthetics of the body support device will be improved.

  Hereinafter, the Example of the body support tool 1 of this invention is described, referring FIGS. FIG. 1 shows a case where a body support device 1 according to the present invention is applied to a seat of an automobile. Since the body support device 1 is used for filling (relaxing) the gap formed between the occupant and the backrest 3, the body-side covering member 4 that contacts the body part has a shape that follows the surface shape of the body as much as possible. It is required to be. On the other hand, the non-body-side covering member 5 is required to have a shape that follows the surface shape of the backrest 3 as much as possible.

  FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and the body support device 1 has not only the back part of the body but also the part extending from the back to both flank according to the body shape. Is required. In order to satisfy such requirements, the body support device 1 of the present invention is filled with a large number of granules 6 coated with a moisture-curable resin inside the covering members 4 and 5. Further, the entire body support device 1 is covered with covering members 4 and 5 made of a moisture-permeable material that can be pressed and deformed, and the body part is brought into contact with the body-side covering member 4 so that the granular body 6 can be moved relative to each other. Yes. And the covering members 4 and 5 are comprised from the raw material which has the characteristic from which the body side covering member 4 and the non-body side covering member 5 which contact | abut to a body part differ.

  3 to 5 show an initial state before the moisture curable resin of the body support device 1 according to the present invention is cured, FIG. 3 is a front view seen from the body side, FIG. 4 is a plan view, FIG. 5 shows a right side view. In the front view, it has a shape similar to a rectangular cushion with large rounded corners. Until it is actually used as the body support device 1, it is stored in a moisture-proof bag in the initial state shown in the figure.

  6-9 is sectional drawing for demonstrating the internal structure and manufacturing method of the body support tool 1 which concern on this invention, and has shown the center longitudinal cross-sectional view of the body support tool 1. FIG. FIG. 6 shows constituent members excluding a large number of granular bodies 6 coated with moisture-curable resin among members constituting the body support device 1. A covering member 4 having low stretchability is used on the surface on the body side with the sponge 7 serving as a cushioning material interposed therebetween. And the coating member 5 with high elasticity is arrange | positioned on the coating member 4 with low elasticity. On the other hand, the non-woven fabric 8 is disposed on the surface of the sponge 7 on the side opposite to the body, and the anti-body side covering member 5 having high elasticity, the body side covering member 4 having low elasticity, the sponge 7 and the nonwoven fabric 8 are sewn. . That is, the four members are sewn by the sewing thread 9 at a position about 5 mm away from the end 3a. Sewing with the sewing thread 9 is performed on the three sides 3a among the four sides of the front view rectangle. The remaining side 3b is sewn with a sewing thread 9 after covering the ends of the sponge 7 and the nonwoven fabric 8 with a covering member 4 having a low stretchability, which is a body side covering member, and providing a folding margin 4a. In addition, for the purpose of clarifying the portion where the substantially back contacts, if necessary, only the sponge 7, the nonwoven fabric 8, and the covering member 4 with low stretchability can be stitched 10 in place. Here, the reason why the sponge 7 is provided is to improve the sense of contact with the body. The non-woven fabric 8 is provided because the sponge 7 is cut when the sponge 7 is sewn with the sewing thread 9 without providing the non-woven fabric 8.

  FIG. 7 shows a state in which the highly stretchable covering member 5 is turned over when the process of FIG. 6 is completed. That is, the non-sewn side of the highly stretchable covering member 5 is grasped and inverted to the non-body side. Here, since the non-body-side covering member 5 is made of a highly stretchable material, it can be easily reversed after sewing. It should be noted that terminal processing is applied to the remaining one side 5a of the end portion of the non-body-side covering member 5 except for the three sides sewn first. That is, the end 5a is folded inward and sewn with the sewing thread 9.

  FIG. 8 shows the filling of the body-side covering member 4 provided on one side serving as the opening 11 while filling the non-body-side covering member 5 with a large number of granules 6 coated with moisture-curing resin. A state in which the heat-melting resin 12 is disposed in the folding margin 4a is shown. The non-body-side covering member 5 has high stretchability, and when the granular material 6 coated with a moisture curable resin is filled between the nonwoven fabric 8 and the anti-body-side covering member 5, the surface becomes a gentle convex surface. After filling an appropriate amount of the granular material 6, the heated molten resin 12 is disposed along the length direction of the opening 11. Thereafter, the non-body-side covering member 5 and the turn-around margin 4a of the body-side covering member 4 can be welded by heating with the heated molten resin 12 interposed therebetween. Here, the folding margin 5a of the non-body-side covering member 5 is shortened so that there is no folding margin 5a at the portion that contacts the heat-melting resin 12. Therefore, when the heating means heats from the surface of the non-body-side covering member 5, the heat is easily transmitted to the heated molten resin 12. Therefore, the welding operation can be completed efficiently in a short time.

  FIG. 9 shows a state after the non-body-side covering member 5 and the folding margin 4a of the body-side covering member 4 are heat-welded with the heat-melting resin 12 interposed therebetween. The production as the body support device 1 is completed at this stage, and is then stored in a moisture-proof bag or the like. Here, the folding margin 4a of the body side covering member 4 is made longer than the folding margin 5a of the anti-body side covering member 5. As a result, after the folding margin 4a of the body side covering member 4 is welded to the inside of the non-body-side covering member 5 by the heated molten resin 12, the space between the folding margin 4a of the body side covering member 4 and the nonwoven fabric 8 is provided. 13 is secured, and the granular material 6 coated with moisture-curable resin can enter the space 13. Moreover, since the highly elastic material is used for the non-body-side covering member 5, the sponge 7 is not double-folded at the end portion of the body support device 1. Therefore, the entire surface of the non-body-side covering member 5 becomes gentle, and the aesthetic appearance of the body support device 1 is improved.

  Next, the material of each member used for the body support tool 1 according to the present invention will be described. The granular material 6 has moderate elasticity and is preferably non-reactive or non-reactive in a moisture curable resin to be described later in an uncured state. For example, it is elastic with a softener or a plasticizer. Olefin-based granular materials such as polyethylene, polypropylene and copolymers thereof, as well as elastic vinyl acetate copolymers, polyvinyl chloride, polystyrene, polyester, polyether, polyurethane, neoprene, polybutadiene, silicon, There are granular materials formed of other rubber-based materials. Further, an elastic body or a gel-like body that is non-reactive with the moisture curable resin can be used.

  As this granular material 6, for example, Cosmogel (trade name, manufactured by Cosmo Keiki Co., Ltd.), MNCS (trade name, manufactured by Bridgestone Corporation), Alpha Gel (trade name, manufactured by Siegel Co., Ltd.), Pef (trade name / stock) Company Toray), Mitsufuku Foam (trade name, manufactured by Mifuku Kogyo Co., Ltd.), Exceal (trade name, manufactured by Inoac Co., Ltd.), Calsoft (trade name, manufactured by Takiron Co., Ltd.), Neoprene rubber (Yamamoto Chemical Industries) Co., Ltd.), CR rubber (manufactured by Daiwa Boseki Co., Ltd., Marunobu Chemical Co., Ltd.), silicone sponge (manufactured by Chiyoda Rubber Co., Ltd., INOAC Co., Ltd., Shin-Etsu Chemical Co., Ltd.) and the like can be used.

  The granular material 6 as described above can be formed into a spherical shape, a rod shape, a cubic shape, a rectangular parallelepiped shape, a cylindrical shape, a disk shape, or other shapes, and preferably has a rounded shape, particularly a spherical shape. In addition, this granular material is preferably formed in a solid or hollow shape or in the form of a foam from the viewpoint of the elasticity of the body support device obtained. In the case of a foam, it is preferable to use closed cells so that the moisture curable resin described later does not penetrate into the granular material, and those having a skin layer on the surface are particularly preferable.

The size of the granular body 6 varies depending on the part used as the body support device 1 and the material of the granular body 6 to be used and the type of moisture curable resin, but if it is too large, high air permeability is ensured. is preferably smoothness of Tokatachi property and surface is more than about 8 cm ³ to its size have poor fit as a body support assembly 1 decreases, especially used by a 0.125 cm ³ or less easily surface The smooth body support device 1 can be obtained. As the granular material 6, two or more kinds having different materials, shapes, properties, sizes and the like as described above may be used in combination.

Further, the hardness of the material forming the granular body 6 is 25% compression hardness of about 2 kg / cm ² or less, preferably about 1 according to the hardness test (JIS K6401 5.4) of the soft urethane foam for cushion. 0.0 kg / cm ² or less is preferable. Further, the compression residual strain (JIS K6401 5.5) at this time is about 15% or less, preferably about 13% or less. If the above compression hardness exceeds ² kg / cm ² or the residual strain is 15% or more, it is not preferable because it is too hard and the use feeling becomes worse.

  Next, it is preferable to use a hydraulic urethane prepolymer as the moisture curable resin to be coated on the granular body 6 as described above, because the resin can be easily cured by adding water. A water-curable urethane prepolymer is a prepolymer having an isocyanate group at a terminal obtained by a reaction between a polyol and a polyisocyanate. Other moisture curable resins such as moisture curable silicone resins can also be used. The moisture curable resin preferably has moderate elasticity even after curing. The granular body 6 may be one that forms a bonded state with the moisture curable resin when the moisture curable resin reacts and cures by adding water, or the moisture curable resin. And may be fixed in a state of being wrapped and surrounded by a moisture curable resin without forming a bonded state. In addition, the moisture-curing resin 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 at the time of curing, finished color tone, etc. An agent, a filler, etc. can be mix | blended suitably. As these additives, known compounds corresponding to the components of the moisture curable resin can be appropriately selected and used.

  In the case of a moisture curable resin, a water curable urethane prepolymer as a curing catalyst, for example, bis (2,6 dimethylmorpholino) diethyl ether, triethylenediamine, cyclohexylamine, dimethylethanolamine, substituted morpholine, dimethylpiperazine, etc. Can be used. Further, when the thixotropic agent is used, the moisture curable resin is prevented from being unevenly distributed while the moisture curable resin and the granular material 6 are stored in a mixed state, and both are uniformly mixed. The combined state can be maintained. In the case of a water-curable urethane prepolymer as such a thixotropic agent, a polyalkylene-modified compound obtained by treating the terminal hydroxyl group of silica, titanium oxide, or organic polyalkylene glycol with a hydroxyl group treating agent is generally used as polyethylene glycol, polypropylene glycol or Use these copolymers treated with methyl chloride, fatty acids, etc., aromatic carboxylic esters, benzylidene sorbitol, ditrilidene sorbitol synthesized by acetalization reaction of D-sorbitol and aromatic aldehyde, etc. can do. The amount used is about 0.01 to 6%, preferably about 0.05 to 3%, based on the water-curable urethane prepolymer.

  The physical properties of the moisture curable resin vary depending on the object of use, but the apparent hardness is such that the weight can be applied in about 3 to 30 minutes after the curing time is in contact with water. It is desirable that the storage stability is high and the storage stability is high, and it is preferable to select and use a water-curable urethane prepolymer having such physical properties.

  The mixing amount of the moisture curable resin as described above may be an amount that can wet the surface of the granular material 6, and is usually about 7.5 g or more per liter of the granular material, preferably about What is necessary is just to use about 45-420g. The mixing of the granular material with the moisture curable resin is preferably performed in a mixing container using a universal mixer, a concrete mixer or other mixer in an environment of 20 ° C. and a relative humidity (RH) of 20% or less. It can be performed by filling with dry nitrogen gas, adding a predetermined amount of granular material 6, adding a predetermined amount of moisture-curing resin while stirring, and mixing until uniform.

  In the case where the granule 6 and the moisture curable resin are mixed, the surface of the granule 6 is coated with the moisture curable resin in an amount sufficient to connect the granules 6 and 6. 6 and 6 are bonded together by the uncured moisture-curing resin and are grouped together, but the granular bodies 6 and 6 are in a state where they can move relative to each other. Thus, the thing with which the granular material 6 and resin were mixed can be preserve | saved so that it may not harden | cure, if it accommodates in what has moisture resistance, such as a packaging bag containing aluminum foil, a box, a can.

  Recycled polyester, polypropylene, polyethylene, polyacryl, polyurethane, styrene / isoprene / styrene copolymer (SIS), polyamide and other synthetic fibers, rayon, cotton, hemp and other materials used for the body side covering member 4 Fibers, natural fibers, glass fibers, and other inorganic fibers can be used, but those that are reactive with moisture-curing resins or that have a high water content can be made non-reactive by surface treatment in advance or dried. To remove the moisture. In the case of a water-curable urethane prepolymer, preferred materials include polyester, polypropylene, polyethylene, polyurethane, SIS and the like that do not react with the uncured urethane prepolymer. In particular, a fabric having a characteristic with an expansion / contraction rate in the range of 100% to 190% is preferable. An example of a material having such characteristics is RECARO (manufactured by RECARO), which is a polyester material. The stretch rate of 100% here means the ratio of the length after applying the tensile force to the length before applying the tensile force. That is, the material having a stretch rate of 100% means that the length after applying the tensile force to the length before applying the tensile force is 100%, which means a material that does not stretch.

  As the highly stretchable fabric used for the non-body side covering member 5, a blended fabric of nylon and polyurethane is suitable. In particular, a fabric having a characteristic in which the stretch ratio is in the range of 200% to 400% is preferable. Examples of the material having such characteristics include LYCRA5100 (manufactured by DuPont), which is a blended fabric of 85% nylon and 15% polyurethane.

  The material used for the sponge 7 is preferably a material having a stretch ratio in the range of 120% to 150%. As a material having such characteristics, for example, INOAC UEM35 (manufactured by INOAC), which is a polyurethane material, can be mentioned.

  As the non-woven fabric 8 used for protecting the sponge 7, one having a stretch ratio of 100% to 200% is preferable. As a material having such characteristics, for example, EW-50 (manufactured by Japan Vilene), which is a polyester material, can be mentioned.

  Next, a method of setting the body support device 1 of the present embodiment on a seat of an automobile and curing the moisture curable resin will be described. The body support device 1 is supplied by being sealed and stored in a moisture-proof bag (not shown). Therefore, since the granular material 6 is not exposed to moisture in the housed state, it can be prevented from being hardened reliably, and the moisture-proof bag is opened to add water or water, or further spray the catalyst liquid. The moisture-curing resin coated on the granular material 6 is cured in a short time by being exposed to moisture.

  The body support device 1 is often used by being placed on a seat of an automobile or the like as shown in FIG. Specifically, the body support device 1 is placed from the rear portion of the seat 2 to the backrest 3. That is, in the present embodiment, a use state is shown in which the device functions as the body support device 1 that supports the waist from the back of the user.

  First, the body support tool 1 is taken out from a moisture-proof bag (not shown). The moisture curable resin starts to cure by reacting with moisture in the atmosphere via the covering members 4 and 5 which are moisture permeable members of the body support device 1. Then, the body support tool 1 is installed from the rear part of the seat 2 to the backrest 3, and a cover sheet is put on as necessary.

  Subsequently, when the user (not shown) presses the body against the body support device 1 while sitting, the anti-body side covering member 5 having a high stretchability is greatly extended to follow the surface shape of the backrest 3. The covering member 5 follows and changes. On the other hand, the body-side covering member 4 with low stretchability can accept a small deformation along the shape of the body, but cannot deform so much, so it deforms gently into a concave shape along the body surface shape. As the covering members 4 and 5 are deformed, the granular bodies 6 and 6 in the support portion 14 move relative to each other, and the density of the granular bodies 6 is made substantially uniform in the support portion 14. As a result, the body support device 1 as a whole is quickly deformed into a shape that fits the user's body shape, and the moisture-curing type coated on the surface of the particle body 6 is cured in a short time (3 to 5 minutes). Is fixed and this pressed and deformed shape is maintained as it is. At this time, the granular material 6 is thinned at the central portion by the amount of the pressure, and tries to deform the planar shape of the support portion 14. However, since the granular body 6 is accommodated in the covering members 4 and 5, as a result, the left and right edges of the body support device 1 swell and hold the body so as to wrap from the left and right as shown in FIG. It will be.

  In this way, the body support device 1 that matches the individual seating shape of the user can be easily formed in a short time. In addition, since the portion of the body support device 1 that is in contact with the backrest 3 is smoothly deformed and solidified in a shape that matches the surface shape of the backrest 3, it can be installed in a state that is not easily displaced with respect to the backrest 3. Stability is improved. Moreover, the body support device 1 is one in which the moisture curable resin coated on the granular body 6 is cured and maintains its shape, but each granular body 6, 6 itself has elasticity, A gap is formed between the granular materials 6 and 6, so that not only it is hard but also suitable flexibility is obtained. You will get comfort.

  Further, the body support device 1 of the present embodiment is an interior in which a granular body 6 coated with a moisture-curing resin is sewn with a body-side covering member 4, an anti-body-side covering member 5, a sponge 7, and a nonwoven fabric 8 having different stretchability. Therefore, the product can be provided at low cost with excellent mass productivity. Further, since the body support device 1 is sealed and stored in a moisture-proof bag, it is reliably prevented that the granular bodies 6 and 6 are joined to each other and the support portion 14 is solidified unless removed from the moisture-proof bag. Therefore, it is excellent in transportation / distribution / storage and is very easy to handle.

  As described above, in the body support device 1 according to the present invention, the body-side covering member 4 and the body-side covering member 5 with which the covering members 4 and 5 abut against the body part are made of different materials, and the body-side covering member 4. Is made of a material that is less stretchable than the anti-body-side covering member 5, the granular body 6 in the covering members 4, 5 is the surface of the backrest 3 when the moisture-curable resin is cured to form the body support device 1. It can be easily moved following the shape. Therefore, the shape of the non-body-side covering member 5 after the body support device 1 is molded substantially matches the surface shape of the backrest 3, and the stability when used as the body support device 1 is improved and the usability is improved. Moreover, the beauty of the body support device 1 is also improved.

  As mentioned above, although this invention was demonstrated based on the Example, this invention can carry out various deformation | transformation implementation. For example, in the present embodiment, only a large number of granules 6 coated with moisture-curable resin are filled in the covering members 4 and 5, but the skeleton of the body support device 1 together with the granules 6 in the covering members 4 and 5. By inserting the member which becomes, the beauty | look of the body support tool 1 can be improved further.

It is the schematic which shows the use condition of the body support tool which concerns on this invention. It is sectional drawing which shows the AA arrow of FIG. It is the front view seen from the body side of the body support tool concerning the present invention. It is a top view which shows the body support tool which concerns on this invention. It is a right view which shows the body support tool which concerns on this invention. It is a center longitudinal cross-sectional view which shows the structure of the body support tool which concerns on this invention. It is a center longitudinal cross-sectional view which shows the structure of the body support tool which concerns on this invention. It is a center longitudinal cross-sectional view which shows the structure of the body support tool which concerns on this invention. It is a center longitudinal cross-sectional view which shows the structure of the body support tool which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body support tool 4 Coating | coated member, body side coating | coated member 5 Coating | coated member, anti-body side coating | coated member 6 Granule
14 Support Department

Claims (1)

A support part including a large number of granules coated with a moisture-curing resin is coated with a pressure-deformable covering member, and the covering member is made of a material having moisture permeability, and the body parts are brought into contact with each other by contacting each other. It is a body support device that is used by moving the support part into a shape that matches the part and curing the moisture curable resin, wherein the covering member is a body-side covering member that contacts the body part and an anti-body side covering A body support device, wherein the member is made of a different material, and the stretchability of the body-side covering member is lower than the stretchability of the anti-body-side covering member.

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