JP3161605U - Sofa seat spring structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a uniform seating comfort at any seating position without causing unevenness of the seat even when the sofa is horizontally long, and having a simple structure and advantageous in terms of manufacturing cost. Providing structure. A seat frame 1 having an upper surface portion on which a cushion member C is placed and having a rectangular or elliptical opening 11 formed at the center of the upper surface; and an opening peripheral edge 12 of the seat frame 1 A plurality of stretch belts 2, 2... Stretched obliquely across the entire opening 11 with both ends fixed to the opposing long sides 12 a, 12 a and the adjacent long sides 12 a and short sides 12 b. When the load is applied to the cushion member C disposed on the opening portion 11 of the seat frame 1, the entire cushion member C is elastically distributed by the stretched stretch belts 2. Supported. [Selection] Figure 1

Description

  The present invention relates to an improvement of a sofa seat structure, and more particularly, to a sofa seat spring structure that does not cause unevenness in the seat comfort even in a horizontally long sofa and is also very simple in structure. Is.

  As is well known, the seat of a sofa is often constructed by placing a cushion member on a seat frame provided with a spring, and the seat frame spring has an elastic belt made of rubber thread (trade name `` Waving '' Tape ") is often used.

  In general, the stretchable belt is stretched across the seat frame vertically or horizontally (see, for example, Patent Document 1). Conventionally, the stretchable belt is stretched vertically and horizontally. A special instrument has been developed for this purpose (see Patent Document 2).

  However, the spring structure of the seat part that stretches the stretchable belt vertically and horizontally does not cause any problem in the type like a square stool, but in a horizontally long sofa where multiple people can sit, the stretchable belt that spans horizontally However, there is a problem that the elasticity becomes uneven between the end side and the central portion of the seat portion.

  Specifically, as shown in FIG. 7, a relatively large repulsive force can be obtained on the seat end side (P) close to the fixed end of the elastic belt stretched in the lateral direction, whereas the seat far from the fixed end. In the central part (Q) of the part, the repulsive force of the elastic belt is reduced, and there is a problem that the sinking of the cushion member is increased.

  Furthermore, the comfort of the sofa is easily impaired because the sitting comfort is changed at the sitting position for the above reason. On the other hand, it has been considered to eliminate the uneven elasticity by using a coil spring, an S-type spring or the like instead of the elastic belt, but in that case, the seat structure becomes complicated and the manufacturing cost is likely to be high.

Japanese Utility Model Publication No. 60-133946 (page 1-2, Fig. 1-6) Japanese Unexamined Patent Publication No. 63-115511 (pages 1-7, FIGS. 1-6)

  Accordingly, the present invention has been made in view of the above problems, and the purpose of the present invention is to provide a uniform sitting comfort at any seating position without causing uneven elasticity in the seat even when the sofa is horizontally long. In addition, the present invention provides a sofa seat spring structure which is simple in structure and advantageous in terms of manufacturing cost.

  Means adopted by the present inventors for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention includes a seat frame 1 having an upper surface portion on which the cushion member C is placed, and a rectangular or elliptical opening 11 formed in the center of the upper surface; A plurality of stretch belts 2 which are stretched obliquely across the entire opening 11 with both ends fixed to the 12 opposing long side portions 12a and 12a, and the adjacent long side portion 12a and short side portion 12b. 2 ...
When the load is applied to the cushion member C disposed on the opening 11 of the seat frame 1, the entire cushion member C is elastically supported without bias by the stretch belts 2. is there.

  In the present invention, in addition to the technical means described above, technical means of knitting stretch belts 2 and 2 'stretched in different directions up and down can be adopted as necessary.

  In addition, in the present invention, in addition to the above technical means, if necessary, the technical means of making the stretch belt 2 from a covering yarn fabric formed by winding a covering yarn around an elastic yarn as a core material is adopted. You can also.

  In the present invention, by stretching the stretch belt diagonally across the seat frame of the sofa, it is not necessary to extend the stretch belt in one direction long even when the sofa is horizontally long. The same elasticity and comfort can be obtained when sitting or sitting in the center.

  In addition, since the repulsive force when a load is applied can be adjusted by increasing / decreasing the number of elastic belts in different directions intersecting one elastic belt, adjusting the angle of the elastic belt will The repulsive force required for elastic support can be easily secured.

  In addition, the structure in which the elastic belt is slanted is more difficult than the conventional vertical and horizontal tension, but it is very simple compared to a structure using a coil spring or S-type spring. It can be kept inexpensive.

  Therefore, the present invention can provide a sofa seat spring structure with excellent functionality that can improve comfort during use due to a uniform sitting comfort, so that the practical utility value of the present invention is very high.

It is a whole perspective view showing the seat part structure of the sofa in Example 1 of this invention. It is a whole perspective view showing the seat part structure of the sofa in Example 1 of this invention. It is an expansion perspective view showing the fastening part of the stretch belt in Example 1 of this invention. It is state explanatory drawing showing the spring function of the sofa seat part in Example 1 of this invention. It is a whole top view showing the seat part structure of the sofa in Example 1 of this invention. It is a whole top view showing the seat part structure of the sofa in the modification of this invention. It is the whole top view showing the seat part structure of a sofa in a prior art.

Example 1
First, a first embodiment of the present invention will be described with reference to FIGS. In the figure, what is indicated by reference numeral 1 is a seat frame, and what is indicated by reference numeral 2 is a stretch belt.

  In the first embodiment, a wooden frame in which a crosspiece is disposed in a rectangular frame is used for the seat frame 1 (see FIGS. 1 and 2). Moreover, this seat frame 1 can form the seat part of the sofa S by mounting the cushion member C on the upper surface.

  Then, a plurality of stretch belts 2, 2... Specifically, both ends of the stretch belt 2 are fixed to the opposing long side portions 12a and 12a of the opening peripheral edge 12 and the adjacent long side portions 12a and short side portions 12b with staples as fastening members 21a (see FIG. 3).

  When the stretch belt 2 is stretched, first, one end of the belt is fixed to one side of the opening peripheral edge 12, and then the other end is fixed in a state where the belt is stretched to obtain high elasticity. .

  Incidentally, in Example 1, a waving tape made of a covering yarn (material: nylon) made by winding a covering yarn around an elastic yarn (material: rubber) as a core material is used for the stretch belt 2. ing.

  Further, when the stretch belts 2, 2... Are stretched, the stretch belts 2, 2 having different directions are entangled in a vertical direction so that the individual stretch belts 2 do not cause lateral displacement during use.

  Even when seated on the seat portion of the sofa S shown in FIG. 4 (a) in which the cushion member C is disposed on the opening 11 of the seat frame 1 by the configuration as described above, as shown in FIG. 4 (b). Further, the cushion member C bent downward by the load can be elastically supported by the stretched belts 2, 2..., So that the sitting comfort can be improved with an appropriate repulsive force.

  Further, since the stretch belts 2, 2,... Are obliquely stretched, the length of the stretch belt 2 can be suppressed even when the seat frame 1 has a rectangular shape. Even when sitting on the end side of the cushion member C after the unevenness in elasticity is eliminated, the same sitting comfort can be obtained even when sitting at the center.

  The direction of the stretch belts 2, 2... Is too close to the direction of the long side portion 12 a of the seat frame 1, and the belt becomes long and easily causes uneven elasticity. The number of belts intersecting the belt may be reduced and sufficient elasticity may not be obtained. Therefore, an appropriate stretching angle α · β (see FIG. 5)).

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “the scope of claims for utility model registration”. For example, the shape of the opening 11 of the seat frame 1 is not limited to a rectangular shape, and may be an elliptical shape as shown in FIG. 6. A side part with a large bend is considered as a short side part 12b.

  As for the stretch belt 2, a rubber belt or the like can be used in addition to the belt-like fabric using elastic yarn as long as it is a stretchable belt material. A method may be adopted.

  Also, regarding the stretching angle of the stretch belt 2, it is not necessary to arrange the stretch belts 2 and 2 'in different directions symmetrically, and it is possible to set different stretching angles α and β. It belongs to the technical scope of the present invention.

  Recently, in order to live a comfortable life, the number of consumers who install sofas in the room is increasing, and in the market, there is a demand for comfortable sofas that can satisfy those consumers.

  Under such circumstances, the sofa seat spring structure of the present invention is a useful technology that can improve the sitting comfort by eliminating the uneven elasticity when sitting, so its industrial utility value is very high. .

1 seat frame
11 opening
12 Opening edge
12a Long side
12b Short side 2 Stretch belt
21 Fastening material S Sofa C Cushion material

Claims (3)

A seat frame 1 having an upper surface portion on which the cushion member C is placed and having a rectangular or elliptical opening 11 formed at the center of the upper surface; Including a plurality of stretch belts 2, 2... That are fixed at both ends to adjacent portions 12 a, 12 a, adjacent long side portions 12 a, and short side portions 12 b, and are obliquely crossed over the entire opening portion 11. Configured,
When a load is applied to the cushion member C disposed on the opening 11 of the seat frame 1, the entire cushion member C is elastically supported without bias by the stretch belts 2, 2. Sofa seat spring structure.   2. The sofa seat spring structure according to claim 1, wherein stretch belts 2 and 2 'stretched in different directions are knitted in a vertically entangled state.   The sofa seat spring structure according to claim 1 or 2, wherein the stretch belt (2) is made of a covering yarn fabric formed by winding a covering yarn around an elastic yarn (core material).