JPH071012Y2 - Back chair - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backrest chair having a backrest portion formed in a stitch shape.

[0002]

2. Description of the Related Art Conventionally, rattan stalks have been a typical knitting material used for this type of backrest chair. Wisteria stalks are divided into fibers and made into a long shape, which is used for both vertical and horizontal knitting materials. It is tough and supple, allowing a moderate amount of bending and resilience even when the knitted surface is tightly stretched. It can also absorb shocks,
Its usability is very good.

[0003]

[Problems to be Solved by the Invention] Since the stem of wisteria is tough and supple, the knitting surface has advantages such as the above-mentioned action and effect, but it is easy to bend and the overlapping portion of the stitch And the appearance of the stitches may become unbalanced due to loosening of the stitches.
Also, if the knitted surface remains in a flexed state, the elasticity deteriorates,
There was a drawback that it was cut off from being shocked.

That is, the above-mentioned drawback is that the same material is used in the longitudinal and lateral directions to form the knitting surface of the backrest,
It was not possible to properly control the flexure and elasticity during use.

In the present invention, since the good points of the conventional chair are required for the backrest, the knitting surface of the backrest has appropriate bending and elastic action, and the above-mentioned action is obtained in long-term use. It is a technical object to provide a backrest chair which can be held and whose backrest surface is not deformed.

[0006]

A back chair according to the present invention comprises a warp knitting material in which a frame of a backrest portion is vertically knitted, and a knitting material in a lateral direction so that the warp knitting material is alternately superposed on a front surface side or a back surface side of the warp knitting material. In a backrest chair having a knitting surface formed with a flat knitting material, the warp knitting material is a metal wire and a synthetic resin cord that appropriately dispose the both, and the flat knitting material is a synthetic resin cord, It is characterized in that a column in which the synthetic resin cords are superposed with each other and a column in which the synthetic resin cords and the metal wires are superposed are appropriately arranged on the knitting surface of the knitting material.

[0007]

The backrest of the present invention forms a knitting surface between the back frame and the seat frame of the seat (the rear part of the seat frame) by knitting material in the vertical and horizontal directions. Of these, the warp knitting material uses a steel wire that cannot be easily bent, and a synthetic resin cord that has a little elasticity and can be bent or flexed, and these two different materials are suitable. It is installed in. On the other hand, the same knitted material as the above synthetic resin cord is used. Therefore, in the knitting surface, the longitudinal and horizontal knitting materials are flexible elastic columns in which the same quality of synthetic resin cords overlap, and the non-flexible weak elasticity in which different types of steel and synthetic resin cords overlap. Since the column line portions will coexist, the latter column portion appropriately controls the flexion and elasticity of the former to prevent deformation of the knitting surface and loosening of the knitting part due to the flexion and elasticity.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the backrest chair of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front view of a backrest portion in FIG. 1 in which a synthetic resin cord which is a horizontal knitting material is omitted, and FIG.
A line enlarged sectional view, FIG. 4 is an enlarged view of a B portion, FIG. 5 is an enlarged view of a C portion, FIG. 6 is an enlarged sectional view of an essential part of a backrest portion, FIG. , FIG. 9 is the same plan view, FIG.
0 is the same bottom view, and FIG. 11 is the same side view.

The backrest portion 1 is composed of a back frame 2 and a knitted backrest surface (hereinafter referred to as a knitting surface) 3 formed inside the back frame 2. The back frame 2 has an inverted U shape, and both ends thereof are welded and fixed to the rear side of the seat frame 5 of the seat portion 4.

A warp knitting material 6 is provided between the back frame 2 and the seat frame 5 as shown in FIG. As the warp knit material 6, a steel wire 7 having a substantially circular cross section that cannot be easily bent and bent, and a cross section obtained by extrusion molding a synthetic resin have a substantially circular shape and have a slight elasticity. A flexible synthetic resin cord 8 is used. Various metal wires such as stainless wire may be used instead of the steel wire. Further, as the synthetic resin cord, a cord having a twisted wire in the axial direction may be used.

The steel wire is arranged at the center of the back frame 2 (hereinafter referred to as the first steel wire 7a), and is continuously arranged at appropriate intervals in the left-right direction (hereinafter referred to as the second steel wire). 7b,
Third steel wire 7c, fourth steel wire 7d). Each steel wire 7a-7
The upper and lower ends of d are welded and fixed to the back frame 2 or the seat frame 5. However, holes may be formed in the back frame 2 and the seat frame 5, and both ends of each of the steel wires may be inserted into the holes and engaged.

The synthetic resin cord 8 is the first steel wire 7a.
And the second steel wire 7b, and between the fourth steel wire 7d and the back frame 2. The synthetic resin cord 8 is attached to the back frame 2 or the seat frame 5 by preliminarily cutting it into an appropriate length and bending it at the center to make two cords. , The same material and shape as this synthetic resin cord 8,
The front end of the winding cord 9 which is wound halfway to cover the back frame 2 is inserted, the two are connected, and the back frame 2 is subsequently wound and fixed to the back frame 2. Further, as shown in FIG. 4, the lower end is folded in an L shape to one side as it is, and is wound on the seat frame 5 and wound to cover the seat frame 5 The same type of winding as described above. The cord 10 is fixed to the seat frame by winding the seat frame 5 and the bent portion of the synthetic resin cord 8 together.

Between the right and left sides of the back frame 2, a horizontal knitting material 11 which is knitted into the steel wire 7 which is the warp knitting material 6 or the synthetic resin cord 8 is provided. This uses a synthetic resin cord 12 of the same kind as the synthetic resin cord 8. Further, as in the case of the vertical knitting material, the stranded wire may be inserted in the axial direction of the synthetic resin cord. This synthetic resin cord 12
Covers the right and left side frame portions 13 of the back frame 2 and sequentially descends in the order of the front side of the steel wire 7 or the synthetic resin cord 8 and then the back side thereof, and the vertical and horizontal knitting materials overlap each other. I use the normal knitting method.

More specifically, since the first steel wire 7a is covered with the synthetic resin cord 12 in the vertical line of the first steel wire 7a, the surface of the coating has a little elasticity and the steel wire 7a. The hardness of has been erased. The vertical line of the synthetic resin cord 8 adjacent to the first steel wire 7a is two.
I try to be stronger than one. However, a moderate amount of elasticity and bending are allowed for the pressing in the direction of the arrow in FIG. The superposition with the synthetic resin cord 12 has more flexure and elasticity than the superposition part of the first steel wire 7a.

The second steel wire 7b to the fourth steel wire 7d adjacent to the vertical line of the synthetic resin cord 8 are the first steel wire 7 described above.
It has the same polymerized structure as a and operates in the same manner. Between the fourth steel wire 7d and the left and right side frame portions 13 of the back frame 2, there is a polymerized portion similar to that of the synthetic resin cords, but this is also from the surface of the polymerized portion as described above. Sufficiently bends when pressed by, and is also highly elastic.

Next, one cord 12 made of synthetic resin, which is a flat knitted material woven into the warp knitted material, will be described. Where the first steel wire 7a overlaps with the first steel wire 7a, the first steel wire 7a does not easily bend when pressed, so that the synthetic resin cord 12 is completely prevented from extending. Since the synthetic resin cords 8 on the left and right of the first steel wire 7a are composed of two strands to form a warp knitted material, the synthetic resin cords 12 superposed on the cords are firmly supported. With respect to the pressure from the surface side of the overlapping portion, while having an appropriate elasticity and bending, the bending tendency is prevented.

As described above, one flat knitted material is restrained so as not to bend so much at a portion where it overlaps with a certain warp knitted material, but it can bend and bend more than that at an adjacent portion where it overlaps. Is changing. In this way, the synthetic resin cord 12 is sufficiently supported in the overlapping portion of the knitting surface so as not to have a bending tendency, but it is assumed that the synthetic resin cord 12 is bent due to strong pressure in the overlapping portion of the synthetic resin cords. Even if 8 (or 12) stretches, this stretching phenomenon does not spread to the overlapping portion with the steel wire, and the stretching phenomenon is limited to a part.

On the knitting surface 3 of the backrest portion 1 thus formed, the warp knitting material 6 is overlapped with the cord 8 made of synthetic resin in the row of the steel wires 7, and the weak elastic column portion A which cannot be bent.
Further, the columns of the synthetic resin cords 8 are made of the same material and overlap each other to form a flexible strong elastic column portion B. In this embodiment, since the central portion of the backrest portion 1 that is most easily pressed is the weak elastic column portions A and the strong elastic column portions B which are not bendable alternately arranged, an appropriate elasticity is obtained. And while maintaining flexibility, these effects are controlled so that they can withstand long-term use.

In the drawings, the steel wires 7 are adjacent to each other. However, since this portion is not the portion where the user's back frequently contacts, it is not a superposed row of different materials such as the central portion. Good. However, there is no problem in alternately arranging the entire knitted surface like the central portion. Reference numeral 14 in the drawing is a cushion member housed in the seat frame, and 15 is a leg portion.

[0020]

According to the present invention, the weak elastic column A which cannot be flexed and the flexible elastic column B which can be flexed are alternately arranged at the central portion of the backrest 1 where the user is most in contact with the knitting surface 3. Since the backrest portion has appropriate flexibility and elasticity in use, the elasticity is not deteriorated even after many years of use, and the knitting surface is prevented from being deformed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front view showing a mounted state of a vertical member.

FIG. 3 is an enlarged sectional view taken along line AA.

FIG. 4 is an enlarged view of a B part.

FIG. 5 is an enlarged view of a C portion.

FIG. 6 is an enlarged cross-sectional view of a main part of a knitting surface.

FIG. 7 is a front view of the embodiment.

FIG. 8 is a rear view of the embodiment.

FIG. 9 is a plan view of the embodiment.

FIG. 10 is a bottom view of the example.

FIG. 11 is a side view of the embodiment.

[Explanation of symbols]

 2 Back frame 3 Braided surface 7 Steel wire 8 Synthetic resin cord 11 Synthetic resin cord

Claims (1)

[Scope of utility model registration request] 1. A knitting surface is formed by a warp knitting material in which the inside of a frame of a backrest portion is vertically knitted, and a weft knitting material which is knitted in the lateral direction so as to be alternately superposed on the front surface side or the back surface side of the warp knitting material. In the backrest chair, the warp knitting material is a metal wire and a synthetic resin cord appropriately arranging the both, the weft knitting material is a synthetic resin cord, and the knitting surface of the knitting material is made of synthetic resin cords. A backrest chair characterized in that a column in which is overlapped with a column in which a synthetic resin cord and a metal wire are overlapped is appropriately arranged.