JP3233327U - sofa - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sofa which gives a comfortable feeling to a user. SOLUTION: The sofa is provided with a cushion member used for a seat surface, the cushion member includes an elastic body unit for supporting a load from a user, and the elastic body unit is generated from an elastomer resin and is subjected to a load. It includes a plurality of elastic members that elastically deform accordingly, and a pedestal portion in which the plurality of elastic members are arranged on one surface. [Selection diagram] Fig. 2

Description

The present invention relates to a sofa provided with a cushion member.

Sofas usually use a cushion member (cushion material) for the seat surface. Conventionally, a material such as urethane foam has been used as the cushion member, but since the cushion member is one of the factors that determine the sitting comfort, various cushion members have been proposed.

For example, Japanese Patent Application Laid-Open No. 2001-5141912 (Patent Document 1) proposes a gelatinous cushion having a bent column. The cushion described in Patent Document 1 has a hollow column wall structure in which a shock absorbing element made of a gelatinous elastomer, a viscoelastic elastomer, or the like is formed, and when a load from a user is applied, the column wall surface is affected by the load. By twisting, the pressure is prevented from concentrating on one point, and it is deformed to match the shape of the user.

Special Table 2001-5141912

However, in the cushion described in Patent Document 1, since the difference in the amount of sinking due to the load before and after the twist of the column wall is large, the tactile sensation differs depending on the user and the method of use, which may cause discomfort to the user.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sofa that gives a comfortable feeling to the user.

The present invention relates to a sofa provided with a cushion member used for a seat surface, and the above object of the present invention is that the cushion member includes an elastic body unit that supports a load from a user, and the elastic body unit is an elastomer. This is achieved by including a plurality of elastic members generated from the resin and elastically deformed in response to the load, and a pedestal portion in which the plurality of elastic members are arranged on one surface.

An object of the present invention is to further provide a covering member in which the cushion member is located on the surface layer of the cushion member and at least the upper surface thereof is water-repellent when the cushion member is used for the seat surface. Alternatively, the cushion member has a sweat absorbing property, and the seat member located at the upper part when the cushion member is used for the seat surface is further provided, or the elastic member has a predetermined load. Is arranged on the pedestal portion so that the pressure receiving surfaces of the adjacent elastic members come into contact with each other when the size of the pedestal portion is exceeded, or the hardness of the pedestal portion is the hardness of the elastic member. By being higher, or by further providing a base portion such that the cushion member has a hardness higher than that of the elastic member and lower than the hardness of the pedestal portion and is located below the pedestal portion. , Achieved more effectively.

According to the sofa of the present invention, since an elastic body unit having an elastic member that elastically deforms in response to a load from the user is used for the cushion member, the amount of sinking of the elastic member is limited to a certain range and is used. It is possible to give the user a comfortable feeling of use regardless of the person or the method of use.

It is a perspective view which shows an example of the sofa which concerns on this invention. It is sectional drawing of the seat surface cushion member. It is sectional drawing of the seat surface cushion member. It is a front view before and after the deformation of an elastic member. It is a diagram which shows an example of the relationship between the load applied to an elastic member and the amount of displacement.

In the sofa according to the present invention, an elastic body unit in which an elastic member made of an elastomer resin is arranged on a pedestal portion made of an elastic body such as urethane foam is used as a cushion member. Elastomer resin is a material with rubber elasticity and has the property of elastically deforming depending on the magnitude of the load. Since the area of the pressure-receiving surface increases depending on the magnitude of the load applied to the surface (pressure-receiving surface) that receives the load on the elastic member, the stress on the pressure-receiving surface (force per unit area generated in the member) is larger than the change in load. ) Is small, so that the change in the height of the elastic member is also small. Therefore, when a load from the user is applied to such an elastic member, the amount of subduction of the elastic member depending on the user or the method of use is limited to a certain range, so that a comfortable feeling of use can be obtained. Further, since a plurality of elastic members are arranged on the pedestal, it is possible to accurately support the user according to the sitting position, the movement of the body, and the like. In addition, elastic deformation may refer to deformation that causes deformation by applying a force to an object and completely returns to the original shape when the force is removed, but deformation that almost returns to the original shape is also included in elastic deformation. Shall be.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same components may be designated by the same reference numerals and description thereof may be omitted. Further, the shapes and the like in the following description are examples, and this consideration is not limited to these.

FIG. 1 is a perspective view showing an example of a sofa according to the present invention. The sofa 1 of this example includes a seat frame portion 10, a back frame portion 20, an armrest portion 30, a leg portion 40, a seat surface cushion portion 50 mounted on the seat surface frame portion 10, and a seat surface cushion portion 50 which is a base of the sofa 1. , A back cushion portion 60 arranged on the front surface of the back frame portion 20 is provided. Although two decorative pillows 70 are shown in FIG. 1, they are not essential to the sofa 1 and are used as selectable accessories. The sofa 1 is for three people, the seat cushion portion 50 and the back cushion portion 60 are removable, and the seat cushion portion 50 is composed of three seat cushion members (cushion members), and the back cushion portion is formed. Reference numeral 60 denotes a back cushion member, and each user seated on the sofa 1 uses one set of the seat cushion member and the back cushion member. In the following description, the arrows in FIG. 1 indicate "right", "left", "top", "bottom", "front" and "rear" used in the names of the parts of each component. As shown, it shall indicate the positions of "right", "left", "top", "bottom", "front" and "rear" when the sofa 1 is viewed from the front.

The seat frame portion 10 serves as a horizontal base for the sofa 1 and supports the user seated on the sofa 1 on the upper surface. The back frame portion 20 serves as a base on the back surface of the sofa 1, and supports the user together with the seat frame portion 10 when the user backs up. The seat surface frame portion 10 and the back frame portion 20 (hereinafter, collectively referred to as “frame portions”) are connected by a rear end portion of the seat surface frame portion 10 and a lower end portion of the back frame portion 20.

The frame portion is composed of a frame and a spring layer. The frame is the framework of the sofa 1, and forms the outer shape of the sofa 1, and is made of wood, steel, stainless steel, or the like. The spring layer is a shock absorbing material to be combined with the frame of the seat surface frame portion 10, and a coil spring, a pocket coil spring, an S-shaped spring, a waving belt and the like are used as the shock absorbing material. A coil spring is a spiral spring connected by an iron wire to support a seated user on a surface. The pocket coil spring is a juxtaposed spiral coil spring housed in a non-woven fabric bag, and each coil independently supports the seated user at a point. The S-shaped spring is a juxtaposed S-shaped corrugated spring. The waving belt is made of cloth, which is made by knitting threads and rubber, and is stretched alternately in the vertical and horizontal directions in a grid pattern to give elasticity. Since elasticity, durability, cost, etc. differ depending on each shock absorbing material, it is appropriately selected according to the purpose of use of the sofa 1. In addition, in order to increase the strength of the frame, PP tape (polypropylene tape) as a reinforcing material may be attached to the frame.

The elbow rest 30 is composed of two members of the same type that are connected to the left end surface and the right end surface of the frame portion, respectively, and is formed of a frame made of the same material as the frame of the frame portion, and urethane foam or the like is fixed to the frame. Has been done. The armrest 30 and the back frame 20 are designed so that the upper surface of the armrest 30 and the upper surface of the back frame 20 are at substantially the same height. In addition, PP tape may be attached to the frame of the armrest portion 30 in order to increase the strength.

The frame portion (seat surface frame portion 10 and back frame portion 20) and the armrest portion 30 are covered with upholstery. Leather (genuine leather), faux leather (synthetic leather), fabric (cloth), etc. are used as the material of the upholstery, and the upper surface of the seat frame 10 and the front surface of the back frame 20 are the seat cushions 50, respectively. And the back cushion portion 60, and the lower surface of the seat frame portion 10, the lower surface of the back frame portion 20, and the lower surface of the armrest portion 30 are not normally in contact with the user, so that the tension covering them is covered. The ground (hereinafter referred to as "lining") may be made of a material different from the upholstery (hereinafter referred to as "outer") that covers other parts. The material to be used is appropriately selected based on breathability, stain resistance, durability, design, cost and the like.

The legs 40 are joined to both ends of the lower surface of the armrest 30. The legs 40 are made of wood, steel, stainless steel, or the like, and are appropriately selected based on design, durability, and the like.

The seat cushion portion 50 is placed on the upper surface of the seat frame portion 10, and is usually a place where the user directly sits. Therefore, the structure of the seat cushion portion 50 greatly affects the usability given to the user. The seat cushion portion 50 is composed of three seat cushion members, and each seat cushion member has a substantially rectangular parallelepiped shape of the same shape and has the same structure. The seat cushion portion 50 is fastened to the seat frame portion 10. For example, a hook-and-loop fastener is provided at a position opposite to the lower surface of the seat cushion portion 50 and the upholstery covering the upper surface of the seat frame 10, and the seat cushion portion 50 is engaged with the seat frame portion. Settle at 10. The seat cushion portion 50 may be simply placed on the upper surface of the seat frame portion 10 without being fixed. Details of the seat cushion member will be described later.

The back cushion portion 60 is placed on the rear end portion of the upper surface of the seat cushion portion 50 and is arranged on the front surface of the back frame portion 20, and is usually used as a backrest of a user. The back cushion portion 60 is composed of three back cushion members, and each back cushion member has a bag-like shape with a substantially square front surface and the same structure. The back cushion portion 60 is fastened to the back frame portion 20. For example, a hook-and-loop fastener is provided at a position opposite to the upholstery covering the rear surface of the back cushion portion 60 and the front surface of the back frame portion 20, and the back cushion portion 60 is stopped at the back frame portion 20 by engaging the hook-and-loop fastener. To wear. The back cushion portion 60 may be simply leaned against the front surface of the back frame portion 20 without stopping.

The back cushion member is an outer bag made of the same material as the upholstery that covers the frame portion and the armrest portion 30 with a cushioning material sealed therein. If different materials are used for the outer lining and the lining, the material used for the outer lining is used as the material for the outer bag. A material different from that of Zhangji may be used. Feather, cotton, urethane, etc. are used as the cushioning material.

The decorative pillow 70 is used as a selectable accessory, as described above. It has the same material and structure as the back cushion member, but is smaller in size than the back cushion member.

Details of the seat cushion member will be described.

2 and 3 are cross-sectional views of the seat cushion member 50A. The directions indicated by the arrows in FIGS. 2 and 3 coincide with the directions indicated by the arrows in FIG. That is, in FIG. 2, the upper side and the lower side of the figure are the upper side and the lower side of the seat surface cushion member 50A, respectively, and the left side and the right side of the figure are the left side and the right side of the seat surface cushion member 50A, respectively. It is sectional drawing which cut at the plane which intersects perpendicularly with the upper surface of the cushion member 50A and extends in the left-right direction. In FIG. 3, the upper side and the lower side of the figure are the rear side and the front side of the seat cushion member 50A, respectively, and FIG. 3 is a cross-sectional view cut by the cut surface shown by AA in FIG.

The seat cushion member 50A includes an elastic body unit 54, a base portion 55, a middle seat 56 (seat member), an upper surface seat 57, an inner cover 58 and an exterior cover 59 (covering member), and the elastic body unit 54 includes a pedestal portion. 51, a plurality of elastic members 52 and a unit cover 53 are provided.

The base portion 55 is formed of an elastic body such as urethane foam, and is provided with a bottomed recess having a rectangular opening in the center of the upper surface. The elastic body unit 54 is inserted into this recess. The elastic body unit 54 may occupy the entire upper surface of the seat cushion member 50A without providing the base portion 55. Further, the base portion 55 may be formed by overlapping a plurality of members in the vertical direction. In this case, if a rectangular hole corresponding to the above-mentioned concave portion is formed only in the uppermost member, the formation of the concave portion becomes easy.

In the elastic body unit 54, a plurality of elastic members 52 are arranged on the upper surface of the flat plate-shaped pedestal portion 51, and the whole is covered with the unit cover 53.

The pedestal portion 51 is arranged so that the lower surface faces the bottom surface of the recess provided on the upper surface of the base portion 55. The pedestal portion 51 has a rectangular parallelepiped shape and is formed of an elastic body such as urethane foam.

A plurality of elastic members 52 are arranged on the upper surface of the pedestal portion 51. The elastic member 52 is arranged in a cylindrical shape, for example, in the shape of a cylinder having an outer diameter of 47 mm and a height of 30 mm so that the circular lower surface faces the upper surface of the pedestal portion 51. The elastic member 52 is an elastomer resin, specifically a styrene-based elastomer, and is formed by cutting a molded product (for example, an extruded molded product) in which an oil is contained in a styrene-based base polymer. As a result, the elastic member 52 is an elastic body having low hardness. For example, the hardness of the elastic member 52 is Asker FP10. The hardness of the pedestal portion 51 and the base portion 55 is set higher than the hardness of the elastic member 52. For example, the hardness of the pedestal portion 51 is 196 N and the hardness of the base portion 55 is 117 N. By setting the hardness of the pedestal portion 51 higher than the hardness of the elastic member 52 in this way, the deformation due to the load from the user seated on the sofa 1 acts more strongly on the elastic member 52, which will be described later. The effect of elastic deformation of the member 52 can be accurately exerted. Further, by setting the hardness of the base portion 55 to be between the hardness of the elastic member 52 and the hardness of the pedestal portion 51, when a large load is applied to the sofa 1, the effect of the elastic deformation of the elastic member 52 is ensured. Since the base portion 55 sinks, the overall cushioning property can be improved and a more comfortable feeling of use can be realized. The hardness of the elastic member 52 is measured by a durometer (spring type rubber hardness meter), and the hardness of the pedestal portion 51 and the base portion 55 is based on the urethane foam hardness standard specified in JIS K6401.

The elastic member 52 elastically deforms in response to a load from the user. As a result, the load from the user is dispersed and the pressure value acting on the user is reduced. When no load is applied, the elastic member 52 has a cylindrical shape as shown in FIG. 4 (A), but the pressure receiving surface of the elastic member 52 (the upper surface in FIG. 4 (A)) has a pressure receiving surface. When a load is applied in the direction perpendicular to the inside of the elastic member 52 (hereinafter referred to as "inward direction"), the side surface of the elastic member 52 expands and contracts inward as shown in FIG. 4 (B). At the same time, it is deformed so that the area of the pressure receiving surface increases. FIG. 5 shows an example of the relationship between the load applied to the pressure receiving surface of the elastic member 52 and the amount of inward displacement of the elastic member 52 due to the load. As shown in FIG. 5, when the load applied to the pressure receiving surface of the elastic member 52 gradually increases from 0, the displacement amount changes significantly. In this case, since the area of the pressure receiving surface is also large, the load can be sufficiently dispersed and the pressure value acting on the user who applies the load can be reduced. When the load applied to the pressure receiving surface of the elastic member 52 becomes larger, the rate of change of the displacement amount becomes smaller. That is, since the displacement amount is limited within a certain range, the displacement amount depending on the part of the user is leveled, and a comfortable feeling of use can be obtained.

The elastic member 52 is arranged on the pedestal portion 51 so that when the load applied to the pressure receiving surface exceeds a predetermined magnitude, the pressure receiving surfaces of adjacent elastic members come into contact with each other. When the pressure-receiving surfaces come into contact with each other, the area of the pressure-receiving surfaces is suppressed from expanding, and the amount of displacement of the elastic member 52 inward is leveled, so that a more comfortable feeling of use can be obtained. The predetermined size is appropriately set according to the purpose of use, needs, and the like of the elastic body unit 54.

As shown in FIG. 3, the elastic members 52 are arranged in a staggered manner on the upper surface of the pedestal portion 51. When the elastic body units 54 are arranged in a row in the left-right direction, the elastic members 52 are arranged at regular intervals in one row. The rows are formed at regular intervals in the front-rear direction, and the elastic members 52 in the two adjacent rows are arranged so as to be offset in the left-right direction, when viewed from the front or rear side surface of the elastic body unit 54. , The elastic members 52 in the other row are arranged so as to be located in the middle of the two adjacent elastic members 52 in one row. By arranging the elastic members 52 in a staggered pattern, the distance between the elastic members 52 located diagonally can be made the shortest, so that the effect of the above-mentioned pressure receiving surfaces of the elastic members coming into contact with each other can be efficiently achieved. Obtainable. The arrangement of the elastic members 52 on the upper surface of the pedestal portion 51 does not have to be staggered. Further, in order to show the structure of the elastic body unit 54 in an easy-to-understand manner, the number of elastic members 52 shown in FIGS. 2 and 3 is different from the actual number. It covers the entire plurality of elastic members 52 arranged on the upper surface of the pedestal portion 51. The unit cover 53 is formed of, for example, an elastic body such as urethane having elasticity. The unit cover 53 can prevent the elastic member 52 and the pedestal portion 51 from becoming dirty, and can disperse the force of peeling the elastic member 52 from the pedestal portion 51 by a load from the user. That is, in addition to the elastic members 52 to which the load from the user is directly applied, the elastic members 52 around the elastic members 52 are also loaded via the unit cover 53, so that the force for peeling the elastic members 52 is dispersed. be able to.

The size and hardness of the elastic member 52 are not limited to the above, and can be changed as appropriate, and the shape is not limited to a cylinder, and may be an elliptical column, a polygonal column, or the like. The material of the elastic member 52 is not limited to the styrene-based elastomer as long as it is an elastomer resin, and other elastomer resins such as urethane-based and ethylene-based may be used. Further, it is not necessary to cover the entire pedestal portion 51 and the elastic member 52 with the unit cover 53. However, by covering with the unit cover 53, in addition to the above-mentioned effects, the sticky feeling of the elastic member 52 can be prevented.

The middle sheet 56 is placed so as to come into contact with the entire upper surface of the elastic body unit 54 and the upper surface of the base portion 55. The middle seat 56 has a sweat-absorbing property and absorbs sweat and the like of the seated user. Therefore, as the material of the middle sheet 56, cotton, wool, etc. having sweat absorption are used.

The upper surface sheet 57 is placed on the upper surface of the middle sheet 56. The upper surface sheet 57 is a sheet made of cotton or the like, and has hygroscopicity, moisture release, and the like.

The middle sheet 56 and / or the top sheet 57 may be omitted.

The base portion 55 (hereinafter referred to as "seat surface cushion member main body") into which the upper surface sheet 57, the middle sheet 56, and the elastic body unit 54 are inserted is placed heavily and covered with the inner cover 58, and further, the inner cover is covered. It is covered with an exterior cover 59 from above 58.

The inner cover 58 is used to facilitate covering the seat cushion member body with the outer cover 59. It is possible to directly cover the seat cushion member body with the exterior cover 59, but if the opening of the exterior cover 59 is not large as described later, the inner cover 58 can be used to cover the seat cushion member body with the exterior cover 59. Can be facilitated. A fastener is provided on the peripheral edge of the lower surface of the inner cover 58, and the seat cushion member main body is covered with the inner cover 58 by opening and closing the fastener. The inner cover 58 may not be used when the outer cover 59 can be easily covered directly.

The outer cover 59 covers the seat surface cushion member main body covered with the inner cover 58, and the upper surface is a place where the user is in direct contact with the user. Therefore, at least the upper surface of the exterior cover 59 is made of the same material as the upholstery covering the frame portion and the armrest portion 30. If different materials are used for the upholstery and lining, use the material used for the upholstery. A material different from the upholstery may be used as the material of the exterior cover 59, but it is preferable to use a material having water repellency in consideration of the use of the sofa 1. Fasteners are provided on the rear surface of the exterior cover 59 and a part of the left side surface and the right side surface. A part of the exterior cover 59 is opened by opening the fastener, the seat cushion member main body covered with the inner cover 58 is inserted from the opening, and the seat cushion member main body is covered by closing the fastener.

The inner cover 58 and / or the outer cover 59 may be covered with a fastener other than the fastener.

The sofa 1 in the above-described embodiment is for three people, but a sofa for another number of people may be used. Further, although the seat cushion portion 50 is removable, it does not have to be removable, and the armrest portion 30 may not be provided.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

1 Sofa 10 Seat frame 20 Back frame 30 Elbow 40 Leg 50 Seat cushion 50A Seat cushion 51 Pede 52 Elastic member 53 Unit cover 54 Elastic unit 55 Base 56 Middle seat 57 Top sheet 58 Inner cover 59 Exterior cover 60 Back cushion

Claims (6)

A sofa with cushioning members used for the seating surface.
The cushion member includes an elastic unit that supports a load from the user.
The elastic body unit
A plurality of elastic members generated from an elastomer resin and elastically deformed in response to the load, and
A sofa characterized by including a pedestal portion in which the plurality of elastic members are arranged on one surface. The cushion member
The sofa according to claim 1, further comprising a covering member which is located on the surface layer of the cushion member and whose upper surface is at least water-repellent when the cushion member is used for the seat surface. The cushion member
The sofa according to claim 1 or 2, which has sweat absorption and further includes a seat member located at an upper portion when the cushion member is used for the seat surface. The elastic member
The sofa according to any one of claims 1 to 3, which is arranged on the pedestal portion so that the pressure receiving surfaces of the adjacent elastic members come into contact with each other when the load exceeds a predetermined magnitude. The sofa according to any one of claims 1 to 4, wherein the hardness of the pedestal portion is higher than the hardness of the elastic member. The cushion member
The sofa according to claim 5, which has a hardness higher than the hardness of the elastic member and lower than the hardness of the pedestal portion, and further includes a base portion located below the pedestal portion.

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