JPH0523101Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a device for attaching the backrest of a chair to the backrest so that it can be tilted according to the physique of the seated person.

[Conventional technology]

Various types of devices are already available for attaching the backrest of a chair to the backrest in a tiltable manner, but in most of these devices, the backrest is pivoted to the backrest with an axis pointing in the left-right direction. .

[The problem that the idea attempts to solve]

However, conventional devices have problems in that when the backrest is tilted, an unpleasant squeak is emitted from the shaft portion, and the structure is complicated and assembly is troublesome.

[Means to solve the problem]

In this invention, the front part of an elastic body is fitted from the rear into a channel-shaped connecting plate with an opening at the rear, which connects the front upper ends of the pair of left and right back bars of the chair, and the front part of the elastic body is fitted into the rear part of the elastic body. The above-mentioned problem is solved by fixing a channel-shaped mounting plate that opens at the front to the back plate by sandwiching an elastic body and a connecting plate between it and the back plate of the backrest. be.

[Effect]

In the device of the present invention, the backrest is supported by the back rod via an elastic body that is in pressure contact with the connecting plate and the mounting plate, and the elastic body is elastically deformed to tilt, so that unpleasant noises are not generated when the backrest is tilted. do not have.

Also, due to the elasticity of the elastic body, when the seat is empty, the front of the connecting plate is in contact with a part of the backrest.
The backrest does not wobble backwards.

〔Example〕

Fig. 11 shows a chair to which the present invention is applied.
is fixed.

On both left and right sides of the support base 2, coil springs 5 are attached to the front ends of the lower horizontal parts of a pair of left and right back rods 4, 4, which are made of tubes with an elliptical cross section and are bent in an inverted L shape and are parallel to each other. A backrest 6 is attached to the upper end of the vertical portion of both back bars 4, 4 as described below.

A cushion 8 is attached to the front surface of a synthetic resin back plate 7 of the backrest 6, and a rectangular projecting frame 9 is formed at the lower center of the rear surface.

In the part of the back plate 7 surrounded by the protruding frame 9,
A rectangular mounting frame 10 is integrally formed with a pair of left and right vertical frames 10a and a pair of upper and lower horizontal frames 10b.

Screw holes 11 are formed in the four corners of the rear surface of the mounting frame 10, and a recessed portion 10c is formed in the center of the rear surface of the left and right vertical frames 10a.

The front upper ends of both back rods 4, 4 are connected to each other by a connecting plate 12, and the connecting plate 12 has a channel shape with backwardly facing pieces 12a, 12a bent at both upper and lower ends.

Between both rear pieces 12a, 12a, both back rods 4, 4
The front part of the elastic body 13 made of rubber or the like has a length that is approximately equal to the distance between the opposing surfaces of and has an approximately rectangular cross section.
Fitted without any slack.

Reference numeral 14 denotes a mounting plate having approximately the same length as the elastic body 13 and having vertical pieces 14b, 14b facing upward and downward, respectively, curved at both upper and lower ends of a channel portion 14a which faces in the left-right direction and has a front opening.

The backrest 6 connects the recessed portions 10c of each mounting frame 10 of the backboard 7 with a connecting plate 12 into which an elastic body 13 is fitted.
At the same time, the channel part 14a of the mounting plate 14 is fitted externally to the rear part of the elastic body 13 from behind, and both vertical pieces 14b of the mounting plate 14 are attached to the mounting frame with the bolts 15. It is attached to the back bars 4, 4 by screwing into each of the screw holes 11 of 10.

Normally, the front and rear surfaces of the elastic body 13 are connected to the connecting plate 12 and the channel part 14a of the mounting plate 14, and the front surface of the connecting plate 12 is connected to the recessed part 10a of the mounting frame 10.
The lower surface and rear surface of the lower rearward facing piece 12a of the connecting plate 12 are slightly spaced apart from the channel portion 14a (see FIG. 1).

Reference numeral 16 denotes a cover made of synthetic resin that covers the above-mentioned backrest attachment part, and is open at the front and lower surfaces, and has a flat box shape with a width that allows the upper front part to fit into the protruding frame 9 of the back plate 7. .

The lower central portion of the rear plate 16a of the cover 16 is recessed forward, and gutter-like fitting portions 16b that can be externally fitted onto the back rod 4 from the rear are formed at lower portions on both sides.

A pair of left and right engaging protrusions 17, 1 facing each other are provided on the lower inner surfaces of the side plates 16c, 16c of the cover 16.
7 is provided protrudingly, and a pair of horizontal locking pieces 18, 18 on the left and right are provided in series on the upper part, and each locking piece 1
8 is connected with a hook 19 that faces rearward and downward.

The cover 16 has its front upper part connected to the protruding frame 9 of the back plate 7.
Insert the hooks 19 into the upper end opening edge 4a of the back rod 4, and press the lower part forward to fit the gutter-like fitting part 16b into the back rod 4, and each protrusion 17
is attached to both back bars 4, 4 by elastically engaging with engagement holes 20 formed in the outer surfaces of each back bar 4.

The above-described device in the state shown in FIG. 1, when a seated person leans against the backrest 6,
The elastic body 13 is elastically deformed and elastically tilted backward until the front surface of the channel portion 14a of the mounting plate 14 comes into contact with the rear end of the rearward facing piece 12a of the lower part of the connecting plate 12, producing an unpleasant sound. Never.

The front and rear surfaces of the elastic body 13 are always connected to the connecting plate 1.
2 and the mounting plate 14, and when the seat is vacant, the connecting plate 12
Since the front surface of the backrest 6 is in contact with the recessed part 10c of the mounting frame 10 of the back plate 7, the backrest 6 will not wobble backward.

When the cover 16 is forcibly pushed outward slightly and pulled rearward at the lower portions of the side plates 16c, 16c, the respective protrusions 17 are disengaged from the engagement holes 20, and the hooks 19 are inserted into the opening of the back rod 4. The cover 16 can be removed from the back rod 4 by removing it from the edge 4a.

[Effect of idea]

The device of the present invention has a simple configuration and is easy to assemble as described above, and the backrest is supported by the back rod via an elastic body and tilts due to the elastic deformation of the elastic body, so it makes an unpleasant noise when tilting. It never emits.

In addition, both the front and rear sides of the elastic body are in constant pressure contact with the connecting plate and the mounting plate, and when the seat is empty, the front of the connecting plate is in contact with a part of the back plate of the backrest, which prevents the backrest from shaking backwards. do not have.

[Brief explanation of drawings]

Fig. 1 is a central vertical cross-sectional side view showing the backrest of a chair according to the present invention when the seat is empty, with the cushion omitted; Fig. 2 is a central vertical cross-sectional side view showing the backrest when the chair is tilted backwards, with the cushion omitted. , Figure 3 shows the first
FIG. 4 is a view taken along the line A-A in FIG. 3, FIG. 5 is a view taken along the line B-B in FIG. 3, and FIG.
The figure is a view taken along the line C-C in Fig. 3, and Fig. 7 is a view taken along the line C-C in Fig.
The D-D line arrow view in the figure, Fig. 8 is the E-E in Fig. 3.
A line arrow view, FIG. 9 is a sectional view taken along the line F-F in FIG. 1,
FIG. 10 is a longitudinal sectional side view showing the state of engagement between the back rod and the cover, and FIG. 11 is a side view of the chair to which the present invention is applied. 1... Leg rod, 2... Support base, 3... Seat, 4... Back rod, 4a... Opening edge, 5... Coil spring, 6...
Backrest, 7...Backboard, 8...Cushion, 9...
...Protruding frame, 10...Mounting frame, 10a...Vertical frame, 1
0b...Horizontal frame, 10c...Recessed portion, 11...Threaded hole, 12...Connecting plate, 12a...Rearward piece, 13...
...Elastic body, 14...Mounting plate, 14a...Channel part, 14b...Vertical piece, 15...Bolt, 16
... Cover, 16a ... Rear plate, 16b ... Fitting portion, 16c ... Side plate, 17 ... Protrusion, 18 ... Locking piece, 19 ... Hook, 20 ... Engagement hole.

Claims (1)

[Scope of utility model registration request] The front part of an elastic body is fitted from the rear to a channel-shaped connecting plate with a rear opening that connects the front upper ends of a pair of left and right back bars of the chair, and the channel with a front opening that fits into the rear part of the elastic body. A chair backrest mounting device, characterized in that a shaped mounting plate is fixed to the backrest by sandwiching an elastic body and a connecting plate between the mounting plate and the backboard of the backrest.