JP4015673B2 - Chair backrest board - Google Patents

Description

  The present invention relates to a chair backrest substrate having flexibility.

Conventionally, there are roughly three types of cushion mechanisms for supporting the entire body, such as a chair seat and a backrest.
First, a cushion material such as polyurethane foam or cotton is stretched on the surface of a three-dimensional curved substrate based on a body curve. According to this, the optimal sitting comfort is obtained when the shape of the board and the curve of the body match, but when the body is moved, a sense of incongruity is felt. In addition, only the stretchability of the cushion material can cope with the subtle shape of the body and its change, so a thick cushion material with moderate hardness is required to cope with various physique differences. is there. If the cushioning material is too thin, it may bottom out, and if it is too hard, it will not fit the body well.

  The second one uses a net or canvas instead of the substrate. In particular, if you use a stretchable net, it fits the shape of the body and follows the movement of the body, keeping a comfortable sitting comfort, but due to the structure, the net and canvas are always in tension A material to hold is needed. However, the frame material may hit the body at the front edge of the seat, the upper end of the backrest, etc., and may cause discomfort. Moreover, in order not to hit, the thing made by escaping this part cannot obtain a sufficient supporting area. Furthermore, if there is a hole in the net, it must be replaced immediately.

  The third one should be said to be intermediate between the first one and the second one. By providing an opening in the substrate made of plastic resin, the strength of the substrate is reduced, and when the weight is applied, the substrate It is intended to obtain cushioning properties by utilizing the bending. However, with such a substrate, it is difficult to set which part has a cushioning property, and the deflection of the boundary between the open part and the non-open part is small, and the opening The deflection of the central part is large, and the deviation becomes a problem.

  An object of the present invention is to provide a backrest board for a chair that can fit a seated person's body with a simple structure and can appropriately support the body comfortably following the movement of the body. It is said.

According to the present invention, the above problem is solved as follows.
(1) A large number of corrugated strips are integrally provided in a plate-shaped frame portion made of plastic, and appropriate chevron portions of the corrugated strips adjacent to each other are integrated with them, and the plate thickness is increased. By connecting with a connecting piece that is the same as the corrugated strip, a plurality of hole portions having different shapes for imparting flexibility are formed, and a combination of the plurality of hole portions having different shapes is changed. Thus, the flexibility is partially changed.

  (2) In the above item (1), the hole portion includes a plurality of types having different sizes.

  (3) In the above item (1) or (2), the hole portion includes an elongated long hole facing a fixed direction, and the flexibility is partially changed by changing the length thereof.

  (4) In any one of the above items (1) to (3), the hole portion includes a plurality of types of reference holes having a reference shape and elongated holes having a shape in which a plurality of reference holes are continuously arranged on a straight line. Shall.

  (5) In the above item (4), the reference shape of the reference hole is a single nodule shape, and the long hole is a saddle shape or dumpling shape in which a plurality of the reference shapes are continuously arranged on a straight line.

  (6) In any one of the above items (1) to (5), the holes are arranged in a plurality of rows, and the holes in rows adjacent to each other are arranged in a staggered manner. .

According to the present invention, the following effects can be achieved.
According to the first aspect of the present invention, by providing a combination of a large number of holes having different shapes for imparting flexibility, flexibility can be imparted to a plastic substrate that is not inherently flexible. Not only can its flexibility be varied partially, so it can fit the body of the occupant with a simple structure and follow the movement of the body appropriately. Can be supported comfortably.

  According to the second aspect of the present invention, since the hole portion includes a plurality of types having different sizes, the flexible portion can be changed only by changing the distribution ratio between the large hole portion and the small hole portion. The size can be easily different from other parts.

  According to the third aspect of the present invention, the hole portion includes an elongated long hole facing a certain direction, and the flexibility is partially changed by changing the length thereof. The size of the sex can be easily determined based on the length of the hole, and the appearance can be improved by making each hole uniform.

  According to the inventions of claims 4 and 5, the hole is composed of a plurality of types of reference holes having a reference shape and elongated holes having a shape in which a plurality of reference holes are continuously arranged on a straight line. It is possible to easily determine the hole as one unit and the length of the long hole as an integral multiple thereof, and to make each hole part uniform and improve the appearance.

  According to the invention described in claim 6, the holes are arranged in a plurality of rows, and the holes in the rows adjacent to each other are arranged in a staggered manner in which the positions are shifted. Compared to the case, the flexibility in the direction orthogonal to the row of hole portions is increased, and a smooth flexibility that is uniform in the vertical direction and the horizontal direction can be obtained.

FIG. 1 shows an embodiment of the present invention.
The backrest substrate (1) has a number of corrugated strips that are lined up and down at almost regular intervals across the left and right sides (3) and (3) of the plate-like frame (2). (4) is provided, and is a plate-like one made of plastic.

  The width, corrugation, wave height, wave pitch, vertical spacing, etc. of the corrugated strip (4) may all be the same, but rigidity is greater than in other places, particularly at the waist where the load is high. Thus, it is desirable to set the above requirements.

  A general plate-like substrate formed by molding plastic is not substantially flexible. However, according to the substrate (1) shown in FIG. When the load is applied, the corrugated strip (4) in that portion is stretched to bend and be able to comfortably support the seated person's body.

  In the region where it is desired to increase the rigidity by reducing the flexibility of the substrate (1), the adjacent mountain-shaped portions of the corrugated strips (4) and (4) arranged vertically are connected to each other in the vertical direction. It is connected with (5).

  Note that the uppermost and lowermost corrugated strips (4) and the upper reed (6) and lower recumbent (7) of the frame (2) each have a plurality of support pieces (8 ).

  Depending on the presence / absence of the connecting piece (5), the corrugated strip (4) is stretched at its location, and the flexibility thereof is different, so that the back of the seated person can be supported in the most preferable compressed state.

  That is, in the portion of the board (1) that is to be largely bent, for example, the portion where the seated person's waist or shoulder hits, the number of the connecting pieces (5) in the vertical direction is reduced and the load needs to be strongly supported. The number of connecting pieces (5) can be increased so that various portions of the back surface of the body can be supported in the most preferable state and can be suitably adapted to the overall shape of the back surface of the body.

  According to this embodiment, the adjacent chevron portions of the corrugated strips (4) and (4) arranged in the vertical direction are coupled together by the coupling piece (5), and the corrugated strips (4) at the uppermost and lowermost stages are connected to each other. By connecting the upper reed (6) and the lower reed (7) of the frame part (2) with a plurality of support pieces (8) facing each other in the vertical direction, the frame (2) is flexible to the substrate (1). A large number of hole portions (a1) (a1 ′) (a2) (a2 ′) having different shapes for imparting properties are formed.

The hole (a1) is a reference hole and has a single nodular shape, in this example, a regular hexagonal reference shape.
The hole (a2) is a bowl-shaped long hole in which two reference holes (a1) are continuously arranged on a straight line.
The holes (a1 ′) (a2 ′) are half holes obtained by dividing the holes (a1) and (a2) into two parts.

  In the example shown in FIG. 1, holes (a1) as reference holes are arranged in a line in the vertical direction at the center and both sides in the left-right direction of the substrate (1), and between them, A plurality of bowl-shaped holes (a2) facing in the left-right direction are staggered with their positions shifted in the left-right direction by a half pitch of the holes (a1), which are reference holes, between rows adjacent vertically. In addition, a half-divided hole (a1 ') is provided in the portion adjacent to the left and right side ridges (3) and (3) of the outermost frame portion (2) in the left-right direction, and the most vertically A halved hole (a2 ′) is disposed in a portion of the outer frame portion (2) adjacent to the upper horizontal rod (6) and the lower horizontal rod (7).

  Therefore, a portion with increased rigidity is formed at the center of the board (1) with which the seated person's spine abuts and on both sides of the board (1) that supports both sides of the seated person. A portion having high flexibility is formed, and rigidity and flexibility are intermediate in the upper and lower portions of the frame portion (2) that are close to the upper reed (6) and the lower reed (7). A comfortable fit is obtained when the portion is formed and the seated person falls into the board (1).

  In addition, in the example shown in FIG. 1, the holes (a1) (a1 ′) (a2) (a2 ′) are the smallest in the center, and form a similar shape that is slightly larger in size as they move up and down. By doing so, the rigidity of the central portion of the substrate (1) is kept to some extent.

The substrate (1), either integrally molded plastic, or from a plastic plate may be formed by stamping, Ru manufacturing and cost advantageous der.

In still embodiment of the above you facilities it may also be provided toward waveform Obijo (4) in the vertical direction. In this case, the connecting piece (5) and the support piece (8) face in the left-right direction.

It is a back perspective view showing an example of a chair provided with one embodiment of a backrest substrate by the present invention.

Explanation of symbols

(1) Board
(2) Frame
(3) Acupuncture
(4) Corrugated strip
(5) Connecting piece
(6) Upper recumbent
(7) Lower recumbent
(8) Support piece
(a1) (a1 ') (a2) (a2') hole

Claims (6)

A number of corrugated strips are integrally provided in a plate-shaped frame portion made of plastic, and appropriate corrugated portions of the corrugated strips adjacent to each other are integrated with each other, and the thickness of the corrugated strip is determined. By connecting with a connecting piece that is the same as the strip , a plurality of hole portions with different shapes for imparting flexibility are formed, and by changing the combination of the plurality of hole portions with different shapes, A backrest board for a chair, characterized by having different flexibility.   2. The chair backrest board according to claim 1, wherein the hole portion includes a plurality of types having different sizes.   The backrest of the chair according to claim 1 or 2, wherein the hole portion includes an elongated long hole facing a predetermined direction, and the flexibility is partially changed by changing the length thereof. substrate.   The hole portion is composed of a plurality of types of a reference hole having a reference shape and a long hole having a shape in which a plurality of reference holes are continuously arranged on a straight line. The backrest board for the chair described.   5. The backrest of a chair according to claim 4, wherein the reference hole has a standard shape of a single nodule, and the long hole has a bowl shape or a dumpling shape in which a plurality of the reference shapes are continuously arranged on a straight line. substrate.   The chair according to any one of claims 1 to 5, wherein the holes are arranged in a plurality of rows, and the holes in the rows adjacent to each other are arranged in a staggered manner in which the positions are shifted. Backrest board.

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