JP3009330B2 - Cushion stoppers for chairs, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion for a backrest of a chair or the like or a cushion stopper for a seat cushion and a back plate.

[0002]

2. Description of the Related Art Conventionally, there has been a chair or the like in which a back cushion or the like can be removed in order to replace the back cushion or the like when the back cushion or the seat cushion in the chair or the like becomes dirty. There are the following cushion stoppers for the cushion of the backrest and the back plate.

In a first conventional example, a back surface of a cushion or the like of a backrest is subjected to urethane processing, a wire is provided on an outer surface thereof, and a clip for gripping the wire is provided on a back plate.

In the second example, a back surface of a cushion or the like is subjected to urethane processing in which a wire is integrally formed, and a clip for gripping the wire is provided on a back plate.

[0005] In a third example, a back surface of a cushion or the like of a backrest is subjected to urethane processing, and a wire is provided on the outer surface thereof.
Alternatively, urethane processing in which a wire is integrally formed is performed on the back surface of a cushion or the like of a backrest, and a clip is integrally formed on a back plate.

[0006]

However, a first example is as follows.
We make urethane processing on the back side such as cushions of the backrest,
Since the wire is provided on the outer surface, there is a problem that the wire portion is easily broken as compared with the one formed integrally. In the second example, since the back surface of the cushion or the like of the backrest is subjected to urethane processing in which a wire is integrally formed, there is a problem that accuracy is likely to be deviated and the mounting of the cushion becomes unstable. Further, in the third example, since the clip is integrally formed on the back plate, the accuracy is similarly likely to be deviated, and the mounting of the cushion becomes unstable.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cushion stopper for a chair or the like in which the accuracy is automatically adjusted and the mounting of the cushion is stable.

[0008]

SUMMARY OF THE INVENTION The features of the present invention include a cushion (1), a bottom plate (2) of the cushion, an engaging member (3) engaged with the bottom plate, and an engaging member. The bottom plate (2) is formed with a plurality of engaging portions (21), and the engaging portion (21) is formed on the bottom plate (2 ).
Includes engagement groove (22), formed on the bottom surface of the engaging groove Thea
Ri long diameter portion and a through-hole having a short diameter (23), the transmural
A holding portion (24) formed around the minor diameter portion of the through hole;
And a position regulating portion (25) formed with a predetermined gap above the through hole, and the engagement member (3)
A cylindrical portion (31), a plurality of flanges (32) formed outward at one end of the cylindrical portion, and the cylindrical portion (3).
1) a locking claw portion (33) formed on the inner surface of the other end portion, and the flange (32) has a major axis of the through hole.
And the back plate (4) is provided with a locking projection.
(41) and a locking portion (4) formed on the locking projection.
2), and the locking projections (4 ) of the back plate (4) are provided.
1) is the through hole of the engaging portion (21) of the bottom plate (2).
The flange (32) is formed in a positional relationship corresponding to the through hole (23) , and can penetrate the long diameter portion of the through hole (23) , and comes into contact with the position restricting portion (25) to restrict the position. The flange (32) is rotatable with a clearance around it between the position restricting portion (25) and the holding portion (24), and the rotation causes the holding portion to rotate. By engaging with (24), detachment from the through hole (23) is prevented, and one of the flange (32) or the holding portion (24) has a positioning protrusion (24a). ) Is formed on the other side with a concave portion (32a) that engages with the projection, and the locking portion (42) of the back plate (4) is provided with a locking portion (42) of the engaging member (3). > there is engageable with the locking claw portion (33).

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a cushion stopper of a chair or the like according to the present invention is roughly divided into a cushion 1, a bottom plate 2 of the cushion, an engaging member 3 engaging with the bottom plate, The back plate 4 is engaged with the engaging member.

First, the structure of the bottom plate 2 will be described.
As shown in FIG. 2, this bottom plate is provided on the back side of the cushion 1 of the backrest, is made of polypropylene, and four engaging portions 21 are integrally formed at four corners of the bottom plate. As shown in FIGS. 3 and 4, the specific shape of each engaging portion 21 is such that a concave engaging groove 22 is formed in the bottom plate 2.
On the bottom surface of the locking groove, a long diameter portion and a short diameter portion described later are provided.
Through hole 23 having Yes and is formed, the short of the through hole
A shelf-like holding portion 24 is formed around the diameter portion.
In addition, a position regulating portion 25 is formed above the through hole with a predetermined gap . The shape of the through hole 23 is shown in FIG.
(A), as shown in FIG. 5 (A), the vertical direction of the drawing
A long diameter portion and a short diameter portion in the left-right direction, which are similar to the outer shape of a flange 32 (FIG. 4B) of the engagement member 3 described later , and are slightly larger than the flange. It can be inserted. As shown in FIG. 4A , two holding portions 24 , 24 are opposed to each other on the left and right sides of the through hole 23 , and the length from one end to the other of the two holding portions. That is, the inner diameter of the inner wall surface of the engagement groove 22 is slightly longer than the length of the long diameter portion of the flange 32. As shown in FIGS. 4A and 5A , the left holding
On the upper surface of the parts 24, Yes formed projections 24a for positioning, the protrusion, a flange 32, 32 is capable recesses 32a engage with the is formed in the central portion of the lower surface. As shown in FIGS. 1 and 3, above the through-hole 23 is provided with a position regulating portion 25, the shape of the position regulating portion is the same as the shape of the through hole, the position regulating portion 25, through This restricts the upward movement of the flange 32 of the engaging member 3 penetrating the hole 23.

Next, the specific shape of the engaging member 3 is shown in FIGS.
As shown in FIG. 3, the engaging member is formed by integrally forming a cylindrical portion 31, a flange 32, and a locking claw portion 33.
You. The upper end of the cylindrical portion 31 has a facing positional relationship.
In Ri flange 32, 32 is formed extending outwardly tare, the flange has a rectangular shape with rounded on both outer end surfaces, as shown in FIG. 4 (B), a lower surface Is formed with a semicircular concave portion 32a for positioning . On the inner surface of the lower end portion of the tubular portion 31, a locking claw portion 33 is formed, which protrudes slightly inward in a claw shape .

Next, the specific shape of the back plate 4 is shown in FIGS.
As shown in, the inner surface of the back plate, upwardly Yes and locking projection 41 ... that a plurality of cylindrical forms, the distal end portion of the locking projection, the front has a trapezoidal A locking portion 42 is formed. The engaging projections 41 are formed in a positional relationship corresponding to the respective through holes 23 of the engaging portion 21 of the bottom plate 2, and the engaging portion 42 is connected to the engaging member 3. Can be engaged with the locking claw portion 33 of FIG.

Next, the use of the present invention will be described.
To attach the cushion 1 of the backrest to the back plate 4, first, in the state of FIG. 1, the through hole 23 of the bottom plate 2 of the engaging portion 21 of the cushion 1, the engaging member 3 to the major axis of the through-hole flange 32 inserted together, on the flange
Insert until the surface comes into contact with the position regulating portion 25 . This is the figure
This is the state shown in FIG. Next, the tubular portion 31 of the engaging member 3 is grasped.
And rotate the flange 32 by 90 degrees to engage the concave portion 32a of the flange with the projection 24a of the holding portion 24 ,
Place it . This is state shown in FIG. in this way
And, by Rukoto to engage the flange 32 on the holding portion 24, the engaging member 3 is prevented from disengagement from the engaging groove 22. FIG. 3 is a sectional view of this state. At this time, the flange 32 is rotatable between the position restricting portion 25 and the holding portion 24 with a peripheral clearance . For this reason, the engaging member 3 holds the concave portion 32 a of the flange 32
Even if the projection 24a of the portion 24 remains engaged, it can be moved within the clearance. Finally, from the lower end opening of the cylindrical portion 31 of the engaging member 3
When inserting the engagement claw portion 33 of the engaging member is engaged with the locking projection 41 formed on the back plate 4, it is possible to attach the bottom plate 2 to the back plate 4.

In the embodiment, the locking projection 41 is attached to the back plate 4.
Molded integrally with the engaging portion 21 to the bottom plate 2 of the cushion 1
However, the engagement protrusion may be formed on the back plate by integrally forming the locking projection on the bottom plate of the cushion.

In the embodiment, the cushion of the backrest is attached to the back plate. However, the cushion may be used for attaching the seat cushion to the back plate.

[0017]

According to the present invention, the inaccuracy caused by integrally forming the locking projection on the back plate is caused by the fact that the flange of the engaging member is positioned between the position regulating portion and the holding portion. Because of the ability to move with clearance, the deviation is automatically adjusted and the mounting of the cushion does not become unstable. Further, even if a load is applied to the cushion and the torsion occurs, the torsion is automatically adjusted similarly, and the mounting of the cushion does not become unstable. Further, when the engaging member is worn out, only the engaging member can be replaced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view.

FIG. 2 is a perspective view of a chair.

FIG. 3 is a longitudinal sectional view showing a state where a bottom plate and a back plate are separated.

FIG. 4 is a front view of a bottom plate and an engagement member.

FIG. 5 is a partially cutaway front view of a bottom plate and an engagement member.

FIG. 6 is a longitudinal sectional view showing a state in which a bottom plate is attached to a back plate.

FIG. 7 is a view showing a state where an engaging member is inserted into a through hole.

FIG. 8 is a diagram illustrating a state in which the engaging member is engaged by the position regulating unit and the holding unit .

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cushion 2 Bottom plate 21 Engagement part 22 Engagement groove 23 Through-hole 24 Retaining part 24a Projection part 25 Position regulation part 3 Engagement member 31 Tube part 32 Flange 32a Depression 33 Engagement claw part 4 Back plate 41 Engagement projection 42 Stop

Claims (1)

(57) [Claims] 1. A cushion (1), a bottom plate (2) of the cushion, an engaging member (3) engaged with the bottom plate,
The bottom plate (2) is formed with a plurality of engaging portions (21), and the backing plate (4) is engaged with the engaging member. Groove (22) and this engagement groove
And Yes formed on the bottom through-hole having a major axis portion and the minor axis portion (23), holding <br/> lifting portion formed around the minor axis portion of the through hole (24), the through With a predetermined gap above the hole
Since the position regulating portion formed Te (25) becomes, the engagement member (3) is cylindrical portion (31), a plurality of the one end portion of the cylindrical portion is formed outward flange ( 3
2) and a locking claw portion (33) formed on the inner surface of the other end of the cylindrical portion (31). The flange (32) can penetrate the long diameter portion of the through hole.
A capacity shape, said back plate (4) includes a locking projection (41), the locking projections
Provided was engaging portion are the (42) formed in said locking projection of the back plate (4) (41), said bottom plate
(2) a pair with the through hole (23) of the engaging portion (21) ;
Yes formed in a positional relationship to respond, the flange (32) is capable of penetrating the major diameter portion <br/> of the through hole (23), is restricted in position in contact with the position regulating portion (25) The flange (32) is rotatable with a clearance around it between the position restricting portion (25) and the holding portion (24), and the rotation causes the holding portion (2) to rotate.
By engaging with 4), detachment from the through hole (23) is prevented, and one of the flange (32) or the holding portion (24) has a positioning projection (24a). However, on the other side, a concave portion (32a) for engaging with the projection is formed, and the locking portion (42) of the back plate (4) is provided with the engaging member.
Cushion stop in a chair or the like, characterized in that the locking claw portion (33) is engageable (3).