JP3974636B2 - Chair board and chair - Google Patents

Description

  The present invention relates to a chair substrate that is suitable for a backrest portion of a chair and adapted to be adapted to the shape of the back of a seated person, and a chair including the same. However, the chair substrate is not limited to the backrest portion, and can be applied to a seat portion of the chair.

  As what made the board | substrate for the backrest part of a chair bendable, there exists a thing as described in patent document 1, for example.

The substrate for the chair back portion preferably forms a support surface curved in an arc shape in plan view in accordance with the body of the seated person. On the other hand, when the upper and lower parts of the backrest are bent into a dogleg shape by the bent parts on both sides, the opening width of the central part becomes large, and a belt-like support member attached to the central part. Accordingly, a part of the cushion body may be strongly pressed against the seated person's back, which may cause the seated person to feel uncomfortable.
JP 11-75989 A

  In the present invention, when a seated person falls down on a backrest portion or the like by reclining or the like, the chair substrate is bent in a preferable state, and does not cause a sense of incongruity without pressing the seated person's back or the like. An object of the present invention is to provide a chair substrate that can be more fit to the body of the seated person and can provide a comfortable seating feeling, and a chair including the same.

According to the present invention, the above problem is solved as follows.
(1) A chair substrate used for a chair back portion or the like, wherein a mesh portion is formed between the left and right side portions of a synthetic resin plate material, and a connecting portion for connecting mesh wires in the mesh portion. Is substantially U-shaped protruding toward either the front or back of the plate.

  (2) In the above item (1), the plurality of connecting portions are arranged in the vertical direction of the plate material.

  (3) In the above item (1) or (2), the front ends of the plurality of connecting portions are provided so as to be aligned on the same straight line.

  (4) In any one of the above items (1) to (3), by changing the thickness or shape of the plurality of connecting portions, the elasticity of each connecting portion is made different from each other.

  (5) In any one of the above items (1) to (4), projecting dimensions of the plurality of connecting portions toward the surface side of the plate material are made different from each other.

  (6) In any one of the above items (1) to (5), the connecting portion has a bulging shape protruding to one of the front and back sides of the plate material.

  (7) In any one of the above items (1) to (5), the connecting portion is formed in a folded shape protruding to one of the front and back sides of the plate material.

  (8) In any one of the above items (1) to (5), the connecting portion has a pointed shape protruding to one of the front and back sides of the plate material.

  (9) In any one of the above items (1) to (8), it is formed in a concave arcuate shape in front in plan view.

  (10) The chair includes the chair substrate according to any one of (1) to (9) above.

According to the present invention, the following effects can be achieved.
According to the first aspect of the present invention, the connecting portion for connecting the mesh wires in the mesh portion is formed in a substantially U-shape projecting toward either the front or back side of the plate material, so that the seated person falls on the backrest portion. Then, the connecting portion expands and contracts, and the chair substrate can be bent easily, and a comfortable seating feeling can be obtained without pressing the back of the seated person.
Further, since the connecting portion is substantially U-shaped, a continuous and smooth bending and stretching action can be obtained by changing the opening of the opening of the connecting portion.

  According to the second aspect of the present invention, since the plurality of connecting portions are arranged in the vertical direction of the plate material, even if a seated person with different height falls on the backrest portion or the like, the number of places corresponding to the height is single or plural. The connecting portion expands and contracts to obtain a smooth curved surface suitable for the body of the seated person, and a comfortable seating feeling is obtained.

  According to the third aspect of the present invention, since the front ends of the plurality of connecting portions are provided so as to be aligned on the same straight line, the substrate can be bent flexibly on the same line.

  According to the invention described in claim 4, since the elasticity of each connecting portion can be made different from each other by changing the thickness or shape of the plurality of connecting portions, the board on which each part of the body of the seated person abuts The elasticity can be set to an appropriate value for each of the parts, and the board can be fitted to the seated person's body.

  According to the fifth aspect of the present invention, since the projecting dimensions of the plurality of connecting portions to the surface side of the plate material are made different from each other, each portion of the board on which each part of the body of the seated person comes into contact is elastic. The degree can be set to an appropriate value and the board can be fitted to the seated person's body.

  According to the sixth to eighth aspects of the invention, the opening degree of the connecting portion can be increased, a smooth curved surface suitable for the body of the seated person can be obtained, and a comfortable seating feeling can be obtained.

  According to the ninth aspect of the present invention, since the board is formed in a concave circular arc shape in the front in plan view, the board can be fitted to the body of the seated person.

  According to the invention of claim 10, it is possible to provide a chair capable of obtaining a comfortable seating feeling without pressing the back of the seated person.

  An embodiment in which the present invention is applied to a backrest portion of a chair will be described with reference to the drawings. 1 is a front view of a chair substrate, FIG. 2 is a side view, FIG. 3 is a top view, and FIG. 4 is a view taken along the line AA in FIG.

  The chair substrate (1) is made of a metal or synthetic resin shell (thin plate structure by deep drawing), and as shown in the drawing, a punched mesh (hereinafter simply referred to as a mesh) is provided in the middle portion between the left and right side portions. ) (2) is formed, and in a plan view, it is formed in a concave arc shape forward, and in a side view, the waist protrudes forward and the center of the back is slightly inclined rearward.

  As shown in FIGS. 12 and 13, the chair substrate (1) is attached to the support rod (21) of the chair by the lower attachment portion (3) and the upper attachment portion (4).

  The chair substrate (1) comprises an upper shell (5) as a first shell, upper and lower middle shells (6) and (7), and a lower shell (8) as a second shell. The left and right side portions of the opposing end portions of the shells adjacent to each other in the vertical direction are flexibly connected to each other so that the intermediate portions can be expanded and contracted.

  As shown in FIGS. 4 and 5, the connecting portion (9) on the left-right side protrudes to the front surface side of the chair substrate (1) on the left and right outer sides of the mesh (2) portion. It is a thin, U-shaped, forward-facing U-shape, formed integrally with the upper and lower shells (5) and (6), and can be bent at this portion.

The connecting part (10) in the middle part, that is, the mesh (2) part, is composed of a plurality of vertically long thin connecting pieces that connect the upper and lower mesh lines that constitute the mesh (2), and can be extended. It is.
As shown in FIG. 7, the connecting portion (10) also has a forward U-shape projecting toward the front surface side of the chair substrate (1) and opening toward the back surface side.

  FIG. 8 is a longitudinal side view showing a state when pressed by the seated person's back from the left side in FIG. 7, and it is possible to extend in the vertical direction by expanding the U-shaped curved connecting portion. It has become.

  The front end of the connecting portion (10) in the mesh (2) portion is set so as to be aligned on the same straight line as shown in FIG. Therefore, it can bend flexibly on the same line.

  The elasticity of each of the connecting portions (9) and (10) can be set by changing the thickness or selecting the shape.

  9 to 11 exemplify shapes for increasing the opening degree of the connecting portions (9) and (10), which are bulged, folded and pointed, respectively. However, this shape is not limited to these.

  FIG. 12 shows a state in which a seated person normally sits on the chair (11) on which the board for chair (1) is mounted. Note that a support base (15) projects forward from an upper part of a pedestal (14) standing on a base leg (13) with casters (12) in a chair (11).

  A long slide hole (16) is provided at the front end side edge of the fulcrum (15), and the fulcrum shaft (17) inserted through the slide hole (16) supports the seat (18). The lower end of the movable stand (19) is pivotally attached.

A base end portion (front end portion) of the support rod (21) is pivotally attached to the rear end side edge portion of the support base (15) with a support shaft (20) facing in the left-right direction.
The support rod (21) is composed of a part facing forward and a part rising from the rear end thereof, and an upper part of the standing part has a U-shaped bent part that expands toward the front side. The lower part of each part is provided with a B-shaped bent part that expands toward the rear side.

  As shown in the figure, an upward cam piece (22) is fixed to the upper surface of a part slightly behind the front end of the forward facing part of the support rod (21), and the upper part of the cam piece (22) is The base end of the movable stand (19) is movably supported.

  As shown in FIG. 1, mounting portions (3) and (4) provided at the four corners of the chair substrate (1) are engaged with a locking portion (not shown) on the front surface of the upright portion of the support rod (21). By stopping, the chair substrate (1) is mounted. (23) is a cushion body stretched on the front surface of the chair substrate (1).

  In the above configuration, as shown in FIG. 13, when the seat occupant pushes the backrest portion (24) with his back, the upper portion of the support heel (21) tilts backward while maintaining a certain elastic force. In conjunction with this, the upper end portion of the upward cam piece (22) at the base end portion of the support rod (21) also tilts backward. Therefore, the rear portion of the swing stand (19) is inclined downward, and the swing stand (19) moves rearward together with the fulcrum pin (17) that slides rearward of the slide hole (16) inclined rearward and downward.

  By the compression by the back of the seated person, the connecting portions (9) and (10) of the chair substrate (1) are bent backward as shown in FIGS. The bent portion bends in conformity with the pressure by the pressure applied to the upper and lower connecting portions (9) and (10) in FIG. 1 and can be best fitted to the body.

  This invention is not limited to the said form, A design change can be suitably performed according to the objective.

  The chair substrate (1) is generally formed of a synthetic resin, and it is preferable that the whole including the connecting portion is integrally formed of a synthetic resin. However, for example, between the left and right side portions of the chair substrate (1), for example. Other than the connecting portion (10) may be molded from synthetic resin, and the connecting portion (10) between the left and right side portions of the chair substrate (1) may be mounted as a separate member made of metal by embedding or post-processing. .

  The first shell and the second shell may be connected with a connecting portion only at the intermediate portion in the left-right direction.

It is a front view of one embodiment of a board for chairs of the present invention. Similarly, it is a side view. Similarly, it is a top view of an upper end. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a vertical side view which shows the bending state of a connection part. It is CC sectional view taken on the line in FIG. It is a vertical side view which shows the bending state of a connection part. It is a vertical side view which shows the other form of a connection part. It is a vertical side view which shows the other form of a connection part. It is a vertical side view which shows the other form of a connection part. It is a side view of a chair provided with one embodiment of a substrate for chairs of the present invention. Similarly, it is a side view showing a state when the backrest is bent.

Explanation of symbols

(1) Board for chair
(2) Mesh
(3) Lower mounting part
(4) Upper mounting part
(5) Upper shell
(6) (7) Middle shell
(8) Lower shell
(9) (10) Connecting part
(9a) Engagement hole
(9b) Hook 杆
(11) Chair
(12) Casters
(13) Base leg
(14) pedestal
(15) Support base
(16) Slide hole
(17) fulcrum shaft
(18) Seat seat
(19) Swing stand
(20) Spindle
(21) Support rod
(22) Upward cam piece
(23) Cushion body
(24) Backrest

Claims (10)

  A board for a chair used for a backrest portion of a chair, etc., forming a mesh portion between left and right side portions of a synthetic resin plate material, and a connecting portion for connecting mesh wires in the mesh portion, A chair substrate characterized in that it is substantially U-shaped and protrudes toward the front or back of the plate material.   The chair substrate according to claim 1, wherein the plurality of connecting portions are arranged in the vertical direction of the plate material.   The board | substrate for chairs of Claim 1 or 2 which provided the some connection part so that it might be located in a line with the same straight line.   The board | substrate for chairs in any one of Claims 1-3 which varied the elasticity of each connection part mutually by changing the thickness or shape of a some connection part.   The board | substrate for chairs in any one of Claims 1-4 which made the protrusion dimension to the surface side of the board | plate material in a some connection part differ mutually.   The board | substrate for chairs in any one of Claims 1-5 made the connection part the bulging shape which protrudes to one of the front and back of a board | plate material.   The board | substrate for chairs in any one of Claims 1-5 which made the connection part the folding shape which protrudes to one side of the front and back of a board | plate material.   The board | substrate for chairs in any one of Claims 1-5 which made the connection part the pointed shape which protrudes to one of the front and back of a board | plate material.   The board | substrate for chairs in any one of Claims 1-8 formed in the concave circular arc shape ahead in planar view. A chair provided with the board | substrate for chairs in any one of Claims 1-9.

Images