JPH08173273A - Cushion material attachment / detachment mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] When attaching and detaching the cushioning material to the chair, it is easy to attach and detach, and the connection can be ensured. In a chair in which a seat cover 1 and a seat inner 2 are superposed on each other and separable, a sheet metal plate 3 is provided in the width direction of a position near the rear part of the seat cover 1, and a pair of left and right lower fittings is provided at an intermediate position in the front-rear direction. Part 4, a pair of left and right lower fastener mounting parts 5 near the front edge, and claws 6 that engage the sheet metal plate 3 on the seat inner 2; A fitting portion 7 and an upper fastener mounting portion 8 that cooperates with the lower fastener mounting portion 5 are provided near the front edge, and the upper and lower fitting portions 4 and 7 are fitted to the seat cover 1 when the seat inner 2 is closed. And the fasteners 9 inserted into and fixed to the upper and lower fastener attaching portions 5 and 8 for fixing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair, and more particularly to a cushion material attaching / detaching mechanism for a chair.

[0002]

2. Description of the Related Art Most cushions used in office chairs at present can be removed by general loose dowels, but when loosened, they will come off from the main body during transportation or use. It may end up. Especially, it is expected to be very disadvantageous for a chair that requires a large force when reclining.

Therefore, measures have been taken to strengthen the dowels and make them difficult to come off. However, due to variations in production, etc., the hardness of the dowel is not constant and it is too loose to come off during use, it is too strong to come off, and the dowel breaks, causing problems in maintenance. Therefore, in many of these dowels, a metal product is used for the core and a synthetic resin such as plastic is used around the dowel.

[0004]

In recent years, however, the problem of product liability has been screamed, and even such dowels are easily separated at the time of collecting waste, and separated at the time of recycling materials. From the viewpoint of good performance, it is not easy to separate the product using a metal product in the core such as insert molding, and there has been a strong demand for a mechanism for attaching and detaching the cushioning material by means of an alternative component.

In view of the above, the present invention is made of plastic for all parts including dowels (fasteners, etc.) at the time of attaching and detaching the cushion material to the chair, facilitating the attaching and detaching, and ensuring the connection, and further disposing of the chair. The purpose of this invention is to solve the drawbacks of the prior art by providing a cushion material attaching / detaching mechanism for a chair that can improve the separation of the chair.

[0006]

In order to achieve the above object, the present invention provides a chair in which a lower seat cover and an upper seat inner having a cushion material on the surface thereof are superposed and separable from each other. The seat cover is provided with a sheet metal plate in the width direction near the rear portion, a pair of left and right lower fitting portions at an intermediate position in the front-rear direction, and a pair of left and right lower fastener mounting portions near the front edge. Is a claw that engages with the sheet metal plate, an upper fitting portion that fits in a concave-convex manner with the lower fitting portion at an intermediate position in the front-rear direction, and an upper fastener mounting portion that cooperates with the lower fastener mounting portion near the front edge. Each of them is provided, and when the seat inner is closed, it is fixed between the seat cover and the seat cover by the fitting of the upper and lower fitting portions and the fasteners inserted and fixed in the upper and lower fastener mounting portions.

[0007]

According to the above construction, the seat cover and the seat inner are attached to each other by the widthwise sheet metal plate and the claw provided near the rear part when mounted, and the pair of left and right upper and lower fitting parts provided at the intermediate position in the front-rear direction. Are further fixed by fasteners provided on the pair of left and right fastener attachment parts on the left and right sides near the front edge. When detaching, the seat cover and the seat inner can be easily separated by disengaging these fittings and engagements.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

In the cushion material attaching / detaching mechanism of the chair according to the present invention, as shown in FIG. 1, the seat cover 1 on the lower side and the seat inner 2 on the upper side having the cushion material on the surface can be overlapped and separated from each other. In the above-mentioned chair, the seat cover 1 has a sheet metal plate 3 in a width direction near a rear portion, a pair of left and right lower fitting portions 4 at an intermediate position in the front-rear direction, and a pair of left and right lower fastener mounting portions 5 near the front edge. Respectively,
The seat inner 2 has a claw 6 that engages with the sheet metal plate 3, an upper fitting portion 7 that fits into the lower fitting portion 4 at an intermediate position in the front-rear direction, and the lower fastener attachment portion near the front edge. 5
Upper fastener mounting portions 8 that cooperate with each other are provided, and when the seat inner 2 is closed, the upper and lower fitting portions 4 and 7 are fitted between the seat cover 1 and the upper and lower fastener mounting portions 5 and 8. The fastener 9 is inserted and fixed.

Any of the upper and lower fitting portions 4 and 7 may be concave and any of them may be convex. In the embodiment of FIG. 1, the seat cover 1 side is convex (axial) and the seat inner 2 side is concave. They are (cylindrical) and can be fitted to each other (mere fitting).

As shown in FIG. 3, the upper and lower fastener attaching portions 5 and 8 are superposed on each other, and the elongated holes 10 of the same size are provided in both of them.

As shown in FIG. 2, the fastener 9 has a pillar 9b on a bottom portion 9a having a groove 11 on the outer surface thereof, and a vertical slit provided at the center thereof, and the head portion is outward in one direction. Although it is formed on the bent piece 9c (in the same direction as the groove 11), it is sized to pass through the elongated hole 10 including this piece 9c. However, after passing, the dimension A between the outer ends of the pieces 9c, 9c in the free state is
It is made slightly larger than the longitudinal dimension of the elongated hole 10, so that the fastener 9 is always kept penetrating the elongated hole 10 so as not to fall off.

Next, the attachment of the fastener 9 will be described.

First, when the seat cover 1 and the seat inner 2 are overlapped with each other, the sheet metal plate 3 and the claws 6 are engaged with each other at the rear portion and the intermediate position, and the upper and lower fitting portions 4 and 7 are uneven as described above. Since they are fitted to each other, the elongated holes 10 are aligned with the upper and lower fastener mounting portions 5 and 8 as shown in FIG. Therefore, the fastener 9 is inserted into the elongated hole 10 and the bottom portion 9a is brought into contact with the outer surface of the mounting portion. Then, in the groove 11 of the bottom portion 9a, as shown in FIG.
When the coin 12 or the like is inserted and rotated in the right-angled direction as shown in (b), this rotation causes the piece 9c of the pillar 9b to come off the elongated hole 10 and contact the outer surface of the fastener mounting portion 8 of the seat inner 2. Therefore, the fastener 9 is fixed at that position. To remove the fastener 9 from this state, insert the coin 12 or the like again and rotate it in the direction at a right angle.
Since the state shown in (b) is reached, the fastener 9 is disengaged from the seat cover 1 and the seat inner 2, and therefore the seat cover 1 and the seat inner 2 can be easily removed from their respective engagements and fittings.

FIG. 4 shows another embodiment 1 of the fastener of the present invention.
In this case, the lower fastener attaching portion 15 provided on the seat cover 1 is erected in the shape of a truncated pyramid, and the vertical elongated hole 14 is provided at the center between the left and right side plates. A hole 15a is provided in the horizontal direction at the center of the direction.
Also, the upper fastener mounting portion 1 provided on the seat inner 2
8 is composed of a pair of hanging side plates at predetermined intervals, and the width thereof is sized so as to be accommodated in the side plate of the lower fastener attaching portion 15. The spacing between the side plates of the upper fastener mounting portion 18 is such that the fastener 19 can be inserted.

The fastener 19 is composed of a column 19b having an intermediate surface with left and right convex portions 19c which rotate in the same direction as the knob 20 on a bottom portion 19a having a knob 20 on the outer surface.

Next, the attachment of the fastener 19 will be described.

First, the seat cover 1 and the seat inner 2 are overlapped with each other, the sheet metal plate 3 and the claw 6 are engaged with each other, and the upper and lower fitting portions 4 and 7 are fitted with the concave and convex portions, as in the above-described embodiment. .
At this time, the upper fastener attaching portion 18 is inserted into the lower fastener attaching portion 15 to form the structure shown in FIG.

Next, the pillar 19b of the fastener 19 is attached to the long hole 1
4 is inserted into the side plates of the upper fastener attaching portion 18 at predetermined intervals, the state shown in FIG. Here, when the knob 20 is rotated in the right angle direction, the convex portion 19c provided in the same direction also rotates and operates so as to press the upper fastener attaching portion 18 toward the lower fastener attaching portion 15 side, whereby the upper fastener attaching portion is operated. The lower fastener attachment portion 15 and the lower fastener attachment portion 18 are fixed in close contact with each other to be in the state shown in FIG. 4B. When removing the fixing, the knob 20 may be returned to the state of FIG. 4 (a) again.

FIG. 5 shows another embodiment 2 of the fastener of the present invention.
The fastener 21 is integrally formed with a frame-shaped lower fastener attaching portion 22 provided on the seat cover side 1 for receiving the flat upper fastener attaching portion 23 provided on the seat inner 2 side. Protrusions 2 that engage with a plurality of grooves 24 arranged above and below the upper fastener mounting portion 23 on the second side
It is a swing piece having 1a.

Next, the attachment of the fastener 21 will be described.

Also in this case, the seat cover 1 and the seat inner 2 are overlapped with each other, the sheet metal plate 3 and the claw 6 are engaged with each other, and the upper and lower fitting portions 4 and 7 are fitted with the concave and convex portions as shown in FIG. Exactly the same as the example. At this point, the upper fastener attaching portion 23 is inserted into the lower fastener attaching portion 22 to obtain the structure shown in FIG. 5B.

When the protrusion 21a is engaged with the groove 24,
The upper fastener mounting portion 23 and the lower fastener mounting portion 22 are locked by the fastener 21 to be in the state of FIG. 5 (a). Here, in order to disengage, when the lower end of the fastener 21 is moved with a finger, the fastener 21 swings with respect to the lower fastener attachment portion 22 by a spring action, the protrusion 21a is disengaged from the groove 24, and the state of FIG. Will be unlocked next. Therefore, the upper fastener mounting portion 23 and the lower fastener mounting portion 2
2 can be easily locked and unlocked.

[0024]

Since the present invention is constructed as described above, the fasteners and fastener attachment parts for attaching and detaching the cushioning material to the chair are all made of plastic, and the attachment and detachment are extremely easy. The discriminability of can also be improved.

[Brief description of drawings]

FIG. 1 is an external perspective view of a cushion material attaching / detaching mechanism of a chair according to the present invention.

2A and 2B show details of an embodiment of a fastener portion in FIG. 1, in which FIG. 2A is a front view, FIG. 2B is a side view, FIG. 2C is a top view, and FIG.

3 shows a state in which the fastener of FIG. 1 is attached to a seat cover and a seat inner, (a) is a sectional view before locking, (b) is a sectional view after locking, and (c) is provided on the seat cover and the seat inner. FIG.

FIG. 4 shows another embodiment 1 of the fastener of the present invention,
(A) is a cross-sectional view of the seat cover and inner seat before being locked, (b) is a cross-sectional view after locking, (c) is a top view of (b), and (d) is a bottom view of (b).

FIG. 5 shows another embodiment 2 of the fastener of the present invention,
(A) is a sectional view of a lock state attached to a seat cover and a seat inner, (b) is a sectional view of unlocking, (c) is a front view of an upper fastener, and (d) is a plan view of a lower fastener and a fastener.

[Explanation of symbols]

 1 Seat cover 2 Seat inner 3 Sheet metal plate 4 Lower fitting part 5 Lower fastener mounting part 6 Claw 7 Upper fitting part 8 Upper fastener mounting part 9 Fastener 10 Long hole 14 〃 15 Lower fastener mounting part 18 Upper 〃 Mounting part 19 Fastener 21 〃 21a Protrusion 22 Lower fastener mounting part 23 Upper 〃 mounting part

Claims (4)

[Claims] 1. A chair in which a lower seat cover and an upper seat inner having a cushion material on the surface thereof are superposed on each other and separable from each other, wherein the seat cover has a rearward position in a width direction. A sheet metal plate, a pair of left and right lower fitting portions at an intermediate position in the front-rear direction, and a pair of left and right lower fastener mounting portions near the front edge, and a claw engaging with the sheet metal plate on the seat inner, an intermediate position in the front-rear direction Is provided with an upper fitting portion that fits into the lower fitting portion in a concavo-convex manner, and an upper fastener mounting portion that cooperates with the lower fastener mounting portion near the front edge. Is fixed by the fitting of the upper and lower fitting portions and the fasteners inserted and fixed in the upper and lower fastener attaching portions. 2. The fastener is inserted into the elongated hole of the upper fastener attaching portion of the seat inner by penetrating the elongated hole provided in the lower fastener attaching portion from the bottom surface of the seat cover on the bottom portion having the groove on the outer surface. , The head is provided with a pillar having a piece bent in one direction, and by rotating the groove provided in the bottom part with a coin or the like, the head rotates in the other direction to prevent the head from coming out of the slot. 2. The method according to claim 1, wherein
Detachable mechanism for the cushion material of the chair described. 3. The upper fastener provided on the upper fastener attaching portion of the seat inner through the elongated hole provided on the lower fastener attaching portion from the bottom surface of the seat cover on the bottom portion having a knob on the outer surface of the fastener. It is inserted into the mounting portion, and is provided with a column provided with a convex portion in the same direction as the knob in the middle, and by rotating the knob of the bottom portion, the convex portion rotates and the upper fastener mounting portion is interposed. The cushion material attachment / detachment mechanism for a chair according to claim 1, wherein the cushion material attachment / detachment mechanism is fixed by being fixed so as not to be pulled out from the elongated hole. 4. The fastener is integrally formed with a frame-shaped lower fastener mounting portion provided on the seat cover side for receiving a flat plate-shaped upper fastener mounting portion provided on the seat inner side, and the upper fastener on the seat inner side is formed. A swing piece having projections that engage with a plurality of grooves arranged above and below the mounting portion, and when the projections engage with the grooves, the fastener is locked and unlocked by releasing the engagement. The cushion material attachment / detachment mechanism for a chair according to claim 1, wherein: