JP4484352B2 - Mounting structure of cushion body in chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a cushion body in a chair.
[0002]
[Prior art]
As this type of mounting structure, the cushion body of the chair is generally mounted by screwing from the backrest or the back of the seat.
[0003]
[Problems to be solved by the invention]
However, when the above-mentioned cushion body is screwed to the backrest or the seat, a large number of screws must be tightened, and the screwing operation is complicated.
[0004]
In view of the above-described problems of the prior art, the present invention provides a cushion body that can be easily and reliably attached to a backrest or a seat of a chair without using a set screw. Its purpose is to provide a structure.
[0005]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) In a cushion body mounting structure in which a cushion body that covers a surface of the shell is attached to a shell that is fixed to a frame of a chair, one end of the shell provided with a protruding portion that protrudes on the back side is connected to one end of the cushion body. have covered from the outside so as to surround the projection by part, the distal end portion of the projecting piece projecting from the surface of the shell side of the base end portion of the mounting piece fixed to the edge of the one end of the front Symbol cushion body, the shell inner corner to abut, and the engaging piece protruding from the distal end toward than the projecting piece definitive on the surface of the shell side of the mounting piece, elastic engagement with the engaging hole formed in the shell of the projection To attach the cushion body to the shell.
[0006]
(2) above (1) Oite to claim, the locking hole, and the inner side of the wide portion of one end side of the narrow part and a shell of the shell, through a narrow constriction than the narrow portion The locking piece fitted into the locking hole is narrowed at the front end portion of the locking shaft that faces the front-rear direction, which is wider than the flange portion and narrower than the narrow width portion. An engagement head having a width wider than that of the width portion and narrower than that of the width portion is provided. After loosely fitting the engagement head to the wide width portion, the locking shaft is bent while elastically deforming the flange portion. It is possible to fit between the narrow portions by passing between the gap portions.
[0007]
(3) above (1) or (2) Oite in section a back side lower portion of the cushion body, the fastener is fastened to the lower front of the shell.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a chair including an embodiment in which the present invention is applied to a backrest will be described with reference to FIGS.
[0009]
On both sides of a support base (4) that supports a seat (3) comprising a seat plate (1) and a seat cushion body (2) covering the surface (upper surface), a pair of left and right backrest frames (5) ( The lower end of 5) is pivotally attached. The two backrest frames (5) and (5) have a vertically long shell (6) in which a number of through holes are formed in a required pattern, and upper and lower ends of the backrest frames (5 ) And (5) are integrally formed. The backrest frame (5) and the shell (6) are made of a synthetic resin that can be elastically bent when a seated person falls.
[0010]
As shown in FIG. 3, a protrusion (7) extending substantially horizontally toward the rear is formed at the upper ends of the shell (6) and the backrest frame (5).
[0011]
Immediately below the protrusion (7) in the shell (6), a plurality of locking holes (8) having a Dharma hole shape are formed at left and right intervals. The locking hole (8) has a substantially circular narrow part (9) and an oval wide part (10) between which a narrow part (9) is narrower than the narrow part (9). 11) It is the shape connected up and down via.
[0012]
In the projecting part (7), the upper end part of the vertically long cushioning body (12) covering the surface of the shell (6) and the two backrest frames (5) and (5), that is, the front surface is wound back. It is attached.
[0013]
The upper end portion of the cushion body (12) has a narrower left and right width than the left and right width of the intermediate portion, and is thin so that it can be easily folded back. A synthetic resin mounting piece (13) facing the left and right of the width of the cushion body (12), which is folded in an inverted U shape so as to surround the protrusion (7), faces the left and right of the width of the cushion body. Is fastened.
[0014]
As shown in FIG. 4, a plurality of projecting pieces (14) facing forward are provided at the upper end portion of the mounting piece (13) with a predetermined interval in the left-right direction. Further, the lower end portion of the mounting piece (13) has a lateral width that is narrower than the lateral width of the upper end portion and is slightly curved forward, and the front surface thereof improves the flexibility of the lower end edge. For the purpose, a shallow groove (15) facing in the left-right direction is formed over the entire length.
[0015]
On the front surface at an intermediate position between the plurality of projecting pieces (14) and the recessed groove (15), a plurality of locking pieces (16) facing forward are protruded at intervals in the left-right direction. . Each locking piece (16) is formed at a locking shaft (17) facing forward and a front end portion of the locking shaft (17), and has an engagement head that is wider in the left-right direction than the locking shaft (17). It consists of (18). A slit (17a) that is long in the front-rear direction is formed in the locking shaft (17) so as to penetrate in the vertical direction for the purpose of improving elasticity.
[0016]
The left and right widths of the locking shaft (17) are such that the locking shaft (17) fitted in the narrow width portion (9) of the locking hole (8) is not lowered downward so that it does not come down. Is also wider and narrower than the narrow portion (9). On the other hand, the left and right widths of the engaging head (18) are narrower and narrower than the wide width portion (10) so as to be loosely fitted in the wide width portion (10) and not to come back and forth from the narrow width portion (9). It is wider than the width portion (9).
[0017]
Next, how to attach the cushion body (12) to the shell (6) and the backrest frame (5) will be described with reference to FIG.
[0018]
First, the upper end portion of the cushion body (12) is placed on the protrusion (7) so that the upper surface and the rear surface of the protrusion (7) of the shell (6) are wound from the front upper side, and then the protrusion (7) The upper surfaces of the plurality of projecting pieces (14) of the attachment piece (13) are brought into contact with the lower surface from the rear (see FIG. 3A). Next, with the tip of the projecting piece (14) applied to the inner corner of the projecting part (7) from the lower rear side, the lower end of the mounting piece (13) is used as the center of rotation of the tip of the projecting piece (14). Rotate forward.
[0019]
During the rotation of the mounting piece (13), the engagement head (18) of each locking piece (16) is loosely fitted to the wide portion (10), and then the mounting piece (13) is further rotated forward. Then, the locking shaft (17) passes from the lower side to the upper side while elastically deforming the bent portion (11), and is fitted to the narrow width portion (9). At substantially the same time, the lower end of the mounting piece (13) comes into contact with the back surface of the shell (6). At this time, the locking piece (16) is prevented from coming back and forth by the wide engaging head (18), and is kept from coming down by the narrower neck (11).
[0020]
Finally, the lower end of the back surface of the cushion body (12) is fastened to the lower front portion of the shell (6) by an appropriate known attachment means such as a hook-and-loop fastener (19).
[0021]
A chair provided with the second embodiment in which the present invention is applied to the seat (3) will be briefly described with reference to FIGS. The front end portion of the seat cushion body (2) having a square shape in plan view is narrow and thin so that it can be easily folded downward, like the upper end portion of the cushion body (12) described above. The mounting piece (20) having the same configuration as the mounting piece (13) fixed to the cushion body (12) is fixed to the pad body.
[0022]
The seat plate (1) corresponding to the shell (6) in the first embodiment has a protrusion (21) that protrudes toward the back side, that is, downward, at the front end, and the rear of the protrusion (21). A plurality of Dalma-shaped locking holes (22) are formed at intervals in the left-right direction.
[0023]
The seat cushion body (2) can be easily and reliably attached to the seat plate (1) by the same mounting procedure as the cushion body (12) described above.
[0024]
In any of the above-described embodiments, the mounting piece is separate from the cushion body, but may be formed integrally with the cushion body. Further, although the attachment pieces are fixed to the upper edge of the cushion body in the backrest and the front edge of the seat cushion body in the seat, they may be provided on both side edges of the cushion body.
[0025]
【The invention's effect】
According to the first aspect of the present invention, the cushion body can be easily and reliably attached to the backrest of the chair or the seat shell without using a set screw. Moreover, since the outward movement of the attachment piece is restricted by the protrusion formed at the side end of the shell, it is possible to prevent the cushion body to which the attachment piece is fixed from being displaced outward. Further, the protrusion reinforces the upper end portion of the shell and also serves as a handle when the chair is moved.
[0026]
According to the invention of claim 2 , the cushion body can be easily and firmly attached to the shell.
[0027]
According to invention of Claim 3 , the lower part of a cushion body can be easily attached to a shell.
[Brief description of the drawings]
FIG. 1 is a side view of a chair provided with first and second embodiments of the present invention.
FIG. 2 is also a rear view of the upper part of the backrest.
FIG. 3 is also a vertical side view of the upper part showing an attachment procedure for attaching the cushion body to the shell.
FIG. 4 is an exploded perspective view of a mounting piece and a shell, similarly.
FIG. 5 is an enlarged longitudinal sectional side view of a front end portion of a seat of a chair provided with a second embodiment of the present invention.
[Explanation of symbols]
(1) Seat plate
(2) Seat cushion body
(3) Seat
(4) Support base
(5) Backrest frame
(6) Shell
(7) Projection
(8) Locking hole
(9) Narrow part
(10) Wide part
(11) Drowning part
(12) Cushion body
(13) Mounting piece
(14) Projection
(15) Concave groove
(16) Locking piece
(17) Locking shaft
(17a) Slit
(18) Engagement head
(19) Hook fastener
(20) Mounting piece
(21) Folding part
(22) Locking hole

Claims (3)

In the cushion body mounting structure for mounting the cushion body covering the surface of the shell to the shell fixed to the chair frame,
One end of the shell having a projection which protrudes on the back side, the end portion of the cushion body has covered from the outside so as to surround the protrusions, based on the attached piece fixed to the edge of one end of the front Symbol cushion body the tip of the projecting piece projecting from the surface of the shell-side of the end portion, is in contact with the inner corner of the projecting portion of the shell, and the tip portion closer than the protrusion of definitive to the surface of the shell side of the mounting piece A cushion body mounting structure in a chair, wherein a cushion body is attached to a shell by elastically engaging a protruding locking piece with a locking hole formed in the shell.  The locking hole has a shape in which a narrow part near one end of the shell and a wide part near the inside of the shell are connected via a narrowed part narrower than the narrow part, and the locking hole The locking piece that fits into the front end of the locking shaft that faces the front-rear direction that is wider than the narrow part and narrower than the narrow part is wider than the narrow part and narrower than the wide part The engagement head is loosely fitted to the wide portion, and then the locking shaft is passed between the bend portions while elastically deforming the bend portion to form the narrow portion. The cushion body mounting structure for a chair according to claim 1, wherein the cushion body can be fitted.  The cushion body mounting structure for a chair according to claim 1 or 2, wherein a lower back surface of the cushion body is fixed to a lower front surface of the shell by a hook-and-loop fastener.

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