JP3107741B2 - Pipe chair backrest - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backrest of a pipe chair suitably used in, for example, a concert hall or an event hall.

[0002]

2. Description of the Related Art As shown in FIG. 11, a backrest of a pipe chair used in a concert hall or the like usually has an inverted U-shaped backrest frame (1) erected at a rear portion of a seat body.
It comprises a facing (2) provided on the front side thereof and a backing (3) provided on the back side of the backrest frame (1).

[0003] Conventionally, in the case of the above-mentioned backrest, it is customary to attach the facing (2) to the backrest frame (1) by working from the back side. For example, the backrest shown in the same figure is the both sides (1a) of the backrest frame (1).
At the upper and lower positions of (1a), mounting brackets (1b) are provided so as to protrude inward, and a plurality of screws (4) are respectively inserted from the rear side into mounting holes (1c) of the mounting (1b). The upholstery (2) is fixed to the backrest frame (1) by being inserted and screwed into the buried nut (2a) of the upholstery (2). The backing (3) is fixed to the back side of the backrest frame (1) using an adhesive, a rivet, or the like.

[0004]

By the way, the above-mentioned pipe chair, like other chairs, deteriorates during repeated use, so that the deteriorated portion is repaired or repaired so that it can be used stably for a long time. , Exchange and the like.
In particular, the upholstery (2) of the upholstery (skin sheet 2b) is in direct contact with the occupant, so it deteriorates faster than other parts and needs to be repaired or replaced at a relatively short cycle.

In such a situation, in the above-mentioned conventional backrest, the upholstery (2) is attached by working from the back side of the backrest frame (1). To do, backing (3)
Must be removed to open the back side of the facing (2). In other words, in order to remove the facing (2) for replacement of upholstery, etc., first, the backing (3) should be attached to the back frame (1).
After removing the surface upholstery (2), after taking necessary measures such as replacing the upholstery, the surface upholstery (2) is attached to the frame (1), and the backing (3) is further attached to the frame. It is necessary to attach to (1). In this way, when repairing the surface covering (2), it is necessary to remove and attach the backing (3) which does not require repair, and the repair and replacement work of the surface covering (2) is troublesome, and the maintenance is easy. There was a problem that it was inferior. Moreover, since this type of chair is used in a large number in concert halls and the like as described above, the above-mentioned repair and replacement work of the facing must be performed frequently, and there is a strong demand for improved maintainability. .

The backrest of the conventional pipe chair is
Since the frame (1) is arranged only on the outer peripheral edge portion, sufficient strength cannot be secured, and the frame (1) is deformed and the backrest shape is deformed, for example, when the frame (1) is somewhat violently handled. There was a problem that it was damaged in some cases.

[0007] The present invention solves the above-mentioned problems of the prior art, facilitates the work of attaching and detaching the surface upholstery for repair and replacement of the surface upholstery, provides good maintainability, and ensures sufficient rigidity. It is an object of the present invention to provide a backrest of a pipe chair which can prevent deformation and breakage.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a backrest of a pipe chair in which an inverted U-shaped backrest frame is provided with a front upholstery on the front side and a backing on the back side. In the backrest frame, a bridge bridge is bridged between lower sides of both sides, a plurality of rivet engagement holes are formed in an upper front side of the backing, and the plurality of rivets are formed on a back side of the facing. A plurality of rivets are provided respectively corresponding to the engagement holes, and a plurality of latching pieces are provided corresponding to the bridging bars, and the rivets are densely arranged along the axial direction on the outer peripheral surface of the shaft portion. The backing is attached to the back side of the backrest frame via a fixing means, while the backing piece is hooked on the bridge bar. Stop At the same time, the shaft portion of the rivet is fitted into the rivet engagement hole, and the elastic fin piece of the rivet is engaged with the inner periphery of the rivet engagement hole, so that the facing is on the front side of the backrest frame. The gist shall be the one attached.

[0009] In the present invention, the hanging piece of the surface is
While hanging on the bridging bridge of the backrest frame, the shaft portion of the rivet is inserted into the rivet engagement hole of the backing, and the elastic fin piece of the rivet is engaged with the inner periphery of the rivet engagement hole, thereby increasing the surface upholstery. Because it is to be attached to the front side of the backrest frame, the facing can be removed simply by peeling it off from the backrest frame and backing so as to release the engagement of the rivet and the latching piece,
It can be mounted simply by pressing it against the backrest frame and the backing so that the rivets can be engaged and the latching pieces can be latched. In this way, the upholstery can be attached and detached only from the front side, there is no need to remove the backing, and there is no need to remove the troublesome screws and screws, so the upholstery can be easily attached and detached. Repair of tension can be easily performed.

[0010] Further, since the lower portions of both sides of the backrest frame are connected by the bridge bar, the rigidity of the frame and, consequently, the rigidity of the entire backrest can be improved, and problems such as frame deformation and deformation of the backrest shape can be reliably prevented. can do.

[0011]

FIG. 1 is a perspective view showing a pipe chair to which an embodiment of the present invention is applied, and FIGS. 2 to 4 are views showing a backrest of the chair.

As shown in these figures, the backrest (10) of the chair has an inverted U which is arranged along the outer peripheral edge thereof.
-Shaped metal round pipe back frame (20), a backing (30) arranged on the back side of the back frame (20), and a facing (40) arranged on the front side of the back frame (20). ) Are provided as basic components.

As shown in FIGS. 2 to 5, the backrest frame (20) has a rectangular shape made of metal so as to protrude inward at upper positions of both sides (21) and (21). Mounting brackets (22) (22) made of thin plates are fixedly attached. Each mounting bracket (22) has a screw (5
A screw insertion hole (22a) through which the shaft portion of (0) can be inserted is formed.

Further, a bridging bar (23) made of a strip-shaped metal thin plate is fixed to a lower portion of both sides (21) of the frame so as to bridge between the two sides. The bridge bar (23) is formed so as to be curved forward in accordance with the curved shape of the backrest, and the central region is recessed rearward to form a rib (23b) extending in the length direction. . Further, on both sides of the bridge bar (23), screw insertion holes (23a) (2) through which the shaft of the screw (50) can be inserted.
3a) is formed.

As shown in FIGS. 7 to 9, the backing (3
Reference numeral 0) is made of an integrally molded product of a hard synthetic resin, and has screwed portions (31) integrally formed at four locations on the front side, that is, up, down, left, and right. Screw stop (3
1) includes projections (31) projecting forward on both sides thereof.
a) (31a) and a nut hooking bridge (31b) bridged between the tips of the projecting portions (31a) (31a) are provided at the center of the nut hooking bridge (31b). Is formed with a screw insertion notch (31c) through which the shaft of the screw (50) can be inserted.

A U-shaped nut (5) having an inverted U-shaped side cross section is attached to the nut hooking bridging piece (31b) of each screw stopper (31).
1) is externally fitted from above. Each U-shaped nut (5
1) is formed with screw holes (51a) into which screws (50) can be screwed on both side pieces, respectively, and the screw holes (51a) are formed on the nut locking cross-linking pieces (31b). They are arranged so as to correspond to the screw insertion notches (31c), respectively.

A rivet engaging portion (32) is integrally formed at three upper portions on the front side of the backing (30).

Each of the rivet engaging portions (32) is formed of a cylindrical member protruding forward as shown in FIGS. 2 and 3, and protrudes inward from the inner periphery of the distal end. manner the peripheral tongues rivets engagement (32 b) is formed, is surrounded by the rivet in engagement circumferential tongues (32 b), the rivet engaging hole (32a) is formed. The rivet engagement hole (32a) is formed in a countersink shape by forming the rivet engagement inner peripheral edge (32b) so as to become thinner inward.

On the other hand, as shown in FIG. 2 to FIG. 4 and FIG. 6, the upholstery (40) has a core plate (40a) made of an integrally molded product of a hard synthetic resin. 40
At the lower three places on the back side of a), hooking pieces (41) are integrally formed corresponding to the bridge bars (23) of the backrest frame (20).

Each latching piece (41) is formed in an inverted L-shape when viewed from the side, and the bridge bar (2) of the backrest frame (20) is formed.
3) It is configured to be able to hang from above.

Further, three rivet setting holes (42) are formed in the facing core plate (40a) in correspondence with the rivet engaging portions (32) of the backing (30).

In each rivet setting hole (42), a specific rivet (60) called a Christmas rivet, a Christmas clip or the like is arranged. The rivet (60) is made of a hard synthetic resin as shown in FIG. 10, and has a large number of elastic fin pieces (65) on the outer peripheral surface of the shaft (61) in a dense arrangement along the axial direction. ) Are integrally formed. A shaft portion (61) of the rivet (60) is inserted into the rivet setting hole (42) from the front side and protrudes to the rear side, and a peripheral portion of the rivet head (62) is attached to the front core plate (40a). ) Is arranged in a state of being locked to the peripheral portion of the rivet setting hole (42) on the front side of the rivet (60), and in this state, the head (62) of the rivet (60) is placed on the front side of the facing core plate (40a). The rivet (60) can be fixed by tacking or bonding a rivet holding sheet piece (not shown) so as to cover it.

The rivet setting hole (42) is formed as a so-called fool hole, that is, the rivet setting hole (42).
Is formed to be considerably larger than the diameter of the rivet shaft (65), so that the rivet (60) can be slightly moved in a radial direction orthogonal to the shaft (65).

Also, on the front side of the facing core plate (40a),
A cushion material is arranged, and a skin sheet (upholstery 45) is arranged so as to cover the cushion material.
a) is fixed to the outer peripheral edge on the back side by tacking,
A facing (40) is configured.

The backrest (10) of the present embodiment comprises the above-mentioned components, which are assembled as described below.

That is, a backing (30) is provided on the back side of the backrest frame (20),
The nut (51) is arranged so as to face the screw insertion holes (22a) (23a) on the frame (20) side. And screw (50) is inserted from each front side into each screw insertion hole (22a).
(23a), respectively, and fastened to the nuts (51), thereby fixing the backing (30) to the backrest frame (20). Since the screwing portion on the bridge crossbar (23) side has substantially the same configuration as the screwing portion on the mounting bracket (22) side shown in FIGS. 8 and 9, reference numerals in parentheses are shown in FIGS. 8 and 9. Is used to show the configuration of the screw stop on the bridge bar (23) side.

Next, on the front side of the backrest frame (20), the hooking piece (41) of the facing (40) is hooked on the bridge bar (23) on the frame (20) side. At this time, the rivets (60) of the front lining (40) are positioned so as to face the rivet engagement holes (32a) of the back lining (30).

Subsequently, the rivet setting position is pushed into the backing (30) from the front side of the facing (40). At this time, first, the rivet (60) is lightly pushed in, the rivet shaft (61) is fitted in a small amount into the rivet engagement hole (32a), and the elastic fin of the rivet shaft (61) is placed at a relatively shallow position. (65) is engaged with the rivet engagement inner peripheral convex edge (32b) in a retaining shape to temporarily fix the surface covering (40). In the temporarily fixed state, it is checked whether or not there is any defect. If there is no defect, the rivet (60) is pushed firmly, and the rivet shaft (61) is inserted into the rivet engagement hole (32a).
And the elastic fin piece (65) is engaged with the rivet engagement inner peripheral convex edge (32b) in such a manner as to prevent the elastic fin piece (65) from coming off, and the main fixing is performed.

At the time of fixing, the surface covering (40)
Since the rivet setting hole (42) is formed with a large diameter (a fool hole), the rivet (60) and the rivet engaging hole (32) are formed.
Even if there is a slight dimensional error between the rivet (a) and (a), the rivet (60) moves so as to absorb the error, so that the rivet (60) can be securely engaged.

On the other hand, in order to remove the upholstery (40) in order to replace the upholstery or the like in the backrest thus assembled, pull the upper portion of the upholstery (40) forward (frontward) with a slightly stronger force. Peel off and separate from backrest frame (20). As a result, the rivet (60) on the side of the facing (40) comes out of the rivet engagement hole (32a) while the elastic fin piece (65) is elastically deformed, and the rivet (60) and the engagement hole (32a) Is disengaged.

Next, when the facing (40) is lifted upward and pulled away from the backrest frame (20), the hooking of the hooking piece (41) with the bridge bar (23) is released. The facing (40) can be removed.

After that, after performing appropriate processing such as replacement of the upholstery on the upholstery (40), the upholstery (40) can be re-assembled to the backrest frame (20) as described above. What is necessary is just to hook the hanging piece (41) on the bridge bar (23) and push it into the backing (30) side.

As described above, the surface upholstery (40) can be attached and detached only by working from the front side, and it is not necessary to remove the backing (30). The upholstery (40) can be easily attached and detached, and the upholstery (40)
Repair and replacement work can be performed easily, and good maintainability can be obtained.

Further, since the surface upholstery (40) is attached by the engagement with the engagement piece (41) and the engagement with the rivet (60), there is no need for a troublesome screw attaching / detaching operation.
With a simple operation such as a peeling operation or a pressing operation, the surface upholstery (40) can be detached and attached, and more favorable maintenance can be obtained.

In the present embodiment, a large number of elastic fin pieces (6) are formed on a specific rivet (60), that is, on the outer peripheral surface of the shaft portion (61) in a dense arrangement along the axial direction.
5), the rivet shaft (61) can be engaged with the rivet engaging hole (32a) at any position in the axial direction of the rivet shaft (61). In other words, the fitting amount of the rivet (60) into the engaging hole (32a) can be freely changed, and by adjusting the fitting amount,
The assembling work can be easily performed because an assembling error or the like between the facing (40) and the backing (30) can be absorbed.

In the present embodiment, the lower part of both sides (21) and (21) of the backrest frame is formed by the bridge bridge (2).
3), the frame rigidity is improved,
The rigidity of the entire backrest is improved. Therefore, even in the case of rough handling, it is possible to reliably prevent problems such as frame deformation and deformation of the backrest shape. Moreover, since the ribs (23b) are formed in the intermediate region of the bridge bar (23), the rigidity of the bridge bar (23), that is, the frame rigidity and the rigidity of the entire backrest can be further improved. The members such as the bridge crossbar (23) unique to the present embodiment are very light weight based on the weight of the whole chair, and the weight of the whole chair hardly increases, resulting in an increase in weight. There is no.

Further, in this embodiment, the bridge bar (2) bridged between both sides (21) and (21) of the backrest frame.
3) is also used as a reinforcing member for improving the rigidity of the frame, in addition to the member for hooking the hook piece (41), so that the number of parts can be reduced by using the member together. .

In the above embodiment, the hook pieces (4
Although 1) and 3 rivets (60) are provided in each case, the number is not particularly limited in the present invention, and two or more rivets (60) may be provided.

[0039]

As described above, according to the present invention, the hanging piece of the facing is hooked on the bridge of the backrest frame, and the shaft of the rivet is fitted into the rivet engaging hole of the backing. Since the elastic fin of the rivet is engaged with the inner periphery of the rivet engagement hole, the facing is attached to the front side of the backrest frame. It can be removed simply by peeling it off from the backrest frame and backing to release the stop, and it should be attached only by pressing on the backrest frame and backing so as to engage the rivets and lock the latching pieces. Can be. In this way, the upholstery can be attached and detached only from the front side, there is no need to remove the backing, and there is no need to remove the troublesome screws and screws, so the upholstery can be easily attached and detached. Repair of tension and the like can be easily performed, and good maintainability can be obtained. Furthermore, since the lower part of the both sides of the backrest frame is connected by the bridge bar, the rigidity of the frame and thus the rigidity of the entire backrest can be improved, and the effect of reliably preventing the deformation of the frame and the shape of the backrest can be prevented. There is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pipe chair to which a backrest according to an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view showing a backrest of the embodiment.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is an exploded view of FIG.

FIG. 5 is a front view showing a backrest frame in the backrest according to the embodiment;

FIG. 6 is a rear view showing a surface covering in a backrest of the embodiment.

FIG. 7 is a front view showing a backing of the backrest of the embodiment.

FIG. 8 is a side sectional view showing the vicinity of a screw fixing portion in the backrest of the embodiment, and is a view corresponding to a section taken along line VIII-VIII in FIG. 7;

FIG. 9 is a horizontal cross-sectional view showing the vicinity of a screw stopper in the backrest of the embodiment, and is a view corresponding to a cross section taken along line IX-IX of FIG. 7;

FIG. 10 is a perspective view showing a rivet applied to the backrest of the embodiment.

FIG. 11 is an exploded perspective view showing a backrest of a conventional pipe chair.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Backrest 20 ... Backrest frame 21 ... Backrest frame both sides 23 ... Bridge 30 ... Backing 32a ... Riveting engagement hole 40 ... Surface 41 ... Hanging piece 50 ... Screw (fixing means) 51 ... Nut (fixing means) Reference numeral 60: rivet 61: rivet shaft 65: elastic fin piece

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47C ^7/ 40-7/42

Claims (1)

(57) [Claims] 1. A backrest of a pipe chair in which a front surface of an inverted U-shaped backrest frame is provided on a front side and a backing is provided on a back side, wherein a bridge crosspiece is provided between lower portions on both sides of the backrest frame. A plurality of rivet engagement holes are formed on the front side upper portion of the backing, and a plurality of rivets are provided on the back side of the facing in correspondence with the plurality of rivet engagement holes, respectively. ,
A plurality of latching pieces are provided corresponding to the bridging bars, and the rivet is formed by a number of elastic fin pieces formed in a dense arrangement along an axial direction on an outer peripheral surface of a shaft portion. The backing is attached to the back side of the backrest frame via fixing means, while the hanging piece of the facing is hooked to the bridge bar, and the rivet shaft is formed in the rivet engaging hole. And the elastic fin of the rivet is engaged with the inner periphery of the rivet engagement hole, whereby the facing is attached to the front side of the backrest frame.