JPH07284425A - Cushion mounting structure - Google Patents

Abstract

PURPOSE:To surely mount a cushion to a synthetic resin-made shell with a simple constitution. CONSTITUTION:While a press part 4 having an engaging groove 8 is formed integrally on an outer shell 2 made of a synthetic resin, a linear member 9 is provided on the mounting surface 3a side of a cushion 3 and pushed engagedly into the engaging groove 8 of the press part 4 to mount the cushion 3 to the shell 2. Both side walls 6, 6 of the engaging groove 8 can be urged to move toward each other elastically by an elastic material-made bifurcate clip 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion mounting structure suitable for use in chairs and the like.

[0002]

2. Description of the Related Art In recent chairs and the like, a compression portion having an engagement groove is integrally formed on the inner surface of a shell made of synthetic resin, and is embedded in the cushion mounting surface side. A metal wire rod has been developed in which a part of the metal wire rod is exposed and the metal wire rod is pushed into and engaged with the engagement groove of the pressing portion to attach the cushion to the shell.

[0003]

However, synthetic resins are generally prone to creep changes, and the ability of the pressing portion to elastically hold a metal wire tends to gradually weaken. In addition, polypropylene and A that are often used for shells
A general-purpose resin such as BS has a surface lacking in spring property, so that there is a limit to the elastic clamping ability of the clamping portion.

In the case where the cushion is attached only when it is fixed, the structure described above causes almost no problem, but the back seat can be tilted with respect to the seat, and the shell is integrated with the back seat. Also, in a highly flexible shell whose back is designed to be easily twisted, a slight relative positional change is always caused between the metal wire rod of the cushion and the constriction portion of the shell, and the aforementioned circumstances are large. It becomes a fault.

Further, when a metal wire rod is made to engage with a constriction portion made of only synthetic resin and having poor elasticity, a large degree of moderation cannot be expected, so that an assembly error is likely to occur.
That is, such an engaging portion cannot be seen from the outside with the cushion attached. Therefore, the determination as to whether or not the metal wire rod is reliably engaged with the engagement groove of the pressure-applying portion depends on the response when the metal wire rod is pushed. Therefore,
If the structure is such that it cannot be engaged with a clear feeling of moderation, there is a high possibility that an assembly error will occur.

An object of the present invention is to eliminate all such problems.

[0007]

The present invention takes the following means in order to achieve such an object.
That is, in the cushion mounting structure according to the present invention, a compression portion having an engaging groove is integrally provided in a synthetic resin shell, and a linear member is provided on the mounting surface side of the cushion. A cushion-shaped member is pushed into and engaged with the engagement groove of the compression portion to attach the cushion to the shell, wherein both side walls of the engagement groove of the compression portion are bifurcated elastic members. It is characterized in that it is configured so that it can be elastically biased in a direction toward each other by a clip made of metal.

[0008] As a preferable mode of the clip, a U-shaped clip body having a size capable of bypassing the engagement groove, and extending from both free ends of the clip body in a direction substantially parallel to the axis of the engagement groove. It is possible to cite an example in which both of the leg portions are provided so that both side walls of the engagement groove can be sandwiched from the outside.

The clip may be a one-piece product made of steel material, or an integrally-molded product made of engineering plastic having stable mechanical performance.

[0010]

With this structure, the retaining force for retaining the pressure at the pressure portion of the shell can be enhanced by the elasticity of the clip. Therefore, as long as the clip is made of a highly elastic material that is resistant to creep deformation, the linear member of the cushion engaged with the engaging groove can be reliably retained. This clip is
It is necessary to form a bifurcated shape so as not to interfere with the linear member engaged with the engagement groove, but a complicated structure is not required, and it is necessary to simply align both side walls of the engagement groove. Any material that can be elastically biased may be used. Therefore, it can be easily implemented. In particular, according to the configurations of claims 2 to 4, the clip itself is easy to manufacture, and at the same time, it can be easily attached to the confining portion, and the clip is added to the shell of the existing chair. It is also possible to carry out.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, as shown in FIG.
The present invention is applied to a portion where the cushion 3 is attached to the outer shell 2.

The outer shell 2 is made of polypropylene or A.
Made of synthetic resin such as BS, the inner surface 2a
The pressure-applying portion 4 is integrally formed to project.

As shown in FIG. 2, the compression portion 4 has a vertical wall 5 protruding from the inner surface 2a of the outer shell 2, and side walls 6 and 6 forming a pair branched from the tip of the vertical wall 5. The outer shell 2 is provided with projecting side walls 6, 6 and a reinforcing wall 7 which is integrated with the lower edges of the vertical walls 5 in a state orthogonal to each other. An engagement groove 8 opened to the outside is formed. As shown in FIG. 3, the engagement groove 8 is composed of a holding portion 8a having a substantially U-shape in plan view, a constricted portion 8b having a width narrower than the holding portion 8a, and a guide portion 8c expanding forward. ing.

The cushion 3 comprises a core material made of urethane foam or the like and an exterior material such as cloth attached to the outer surface of the core material. For example, a linear member 9 made of spring steel is embedded inside the cushion material. is there. Then, a concave portion 3b is formed in a portion of the mounting surface 3a of the cushion 3 corresponding to the concavity portion 4, and the linear member 9 is exposed in the concave portion 3b.

The cushion 3 is attached to the outer shell 2 by mounting the clip 11 on the pressing portion 4 and then pushing the linear member 9 into the engaging groove 8 to engage it. ing. The clip 11 has a U-shaped clip body 11a having a size capable of bypassing the engagement groove 8 and extends from both free ends of the clip body 11a in a direction substantially parallel to the axis of the engagement groove 8. The leg portions 11b are provided, and both side walls 6 and 6 of the engaging groove 8 can be held from the outside by the both leg portions 11b. Specifically, recessed portions 6a are formed on the outer side surfaces of both side walls 6 and 6 of the concavity portion 4 corresponding to the constricted portions 8b, and the leg portions of the clip 11 are formed in these recessed portions 6a. The parts 11b are elastically contacted with each other. This clip 11 is made by deforming one linear spring steel.

FIG. 3 is a plan view showing a state before the clip 11 is attached to the pressing portion 4, and FIG. 4 is the pressing portion 4.
It is a top view which shows the state which attached the clip 11 to FIG. 5, and FIG. 5 is a sectional side view which shows the same state. Then, in FIG. 6, the linear member 9 of the cushion 3 is pushed into the engaging groove 8 of the pressing portion 4 having the clip 11 mounted thereon by utilizing the temporary elastic deformation of the pressing portion 4 and the clip 11. It is a top view showing the state where it was made to engage.

With such a structure, the holding force for holding the pressing force in the pressing portion 4 of the outer shell 2 is increased by the clip 1.
It can be reinforced by the elasticity of 1. Moreover, since the clip 11 is made of spring steel, there is no problem that the holding force thereof is significantly reduced by creep deformation unlike the synthetic resin. Therefore, the linear member 9 of the cushion 3 which is engaged with the engaging groove 8 can be surely retained. Therefore, even if the relative deviation is repeatedly generated between the linear member 9 and the pressure-applying portion 4, or the cushion 3 is repeatedly attached to and detached from the outer shell 2,
The cushion 3 can be reliably held by the outer shell 2. Since this clip 11 has a simple structure that can be made by deforming one linear spring steel as described above, it can be easily implemented. Further, if the elasticity of the pressure-applying portion 4 is strengthened in this way, the linear member 9 is engaged with the engaging groove 8
When passing through the constricted portion 8b and engaging the retaining portion 8a, a relatively clear detent response is obtained. Therefore, it is possible to clearly confirm that the linear member 9 has surely engaged with the pressing portion 4, and it is possible to reduce the probability that an assembly error occurs.

The linear member of the cushion is not limited to the one made of a metal wire, but may be one shown in FIGS. 7 and 8, for example. That is, in this product, the mounting surface 3a of the cushion 3 is configured by the inner shell 12 made of synthetic resin. Then, the prismatic portion 1 protruding inward at a required position of the inner shell 12.
3 is formed, and a linear member 14 made of synthetic resin is integrally molded between the top wall (not shown) of the prismatic portion 13 and the bottom wall 13a. With such a configuration, the linear member 14 having a cross section other than the circular shape can be realized relatively easily, and the engagement state can be optimized. Then, FIG. 7 shows a state before the clip 11 is attached, and FIG. 8 shows the state in which the clip 11 is attached to the compression portion 4,
The state in which the linear member 14 is pushed into and engaged with the engagement groove 8 of the pressing portion 4 is shown. Needless to say, the linear member is not limited to one that is positioned inward of the mounting surface 3a of the cushion 3, and for example, the linear member may be integrally provided at a position substantially flush with the inner shell 12. May be.

The material of the clip is not limited to spring steel, but may be piano wire, engineering plastic having stable mechanical performance, or the like.

Further, the present invention can be applied not only to the mounting portion of the outer shell of the chair and the cushion but also to various cushion mounting locations.

Besides, various modifications can be made without departing from the spirit of the present invention.

[0023]

EFFECTS OF THE INVENTION Since the present invention has the structure described above, it is possible to improve the holding performance of the cushioning portion for cushion mounting provided on the shell made of synthetic resin with a simple structure, so that the cushion can be used for a long time. It can be held in the shell without rattling. Moreover, since the elastic holding force of the pressure-applying portion does not easily decrease, the mounting performance can be maintained even in an environment in which relative displacement between the shell and the cushion is relatively likely to occur, and the cushion is frequently removed and attached. However, the mounting part is unlikely to come loose. Moreover, since it is possible to obtain a reliable response when mounting the cushion, it is possible to effectively suppress the occurrence of an assembly error.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an enlarged main part of the embodiment.

FIG. 3 is a plan sectional view showing the main part.

FIG. 4 is a plan sectional view showing the main part.

FIG. 5 is a side sectional view showing the main part.

FIG. 6 is a plan sectional view showing the main part.

FIG. 7 is a plan sectional view corresponding to FIG. 3 showing another embodiment of the present invention.

FIG. 8 is a plan sectional view corresponding to FIG. 6 showing the same embodiment.

[Explanation of reference symbols] 2 ... Shell (outer shell) 2a ... Inner surface 3 ... Cushion 3a ... Mounting surface 4 ... Clamping portion 6 ... Side wall 8 ... Engaging groove 9 ... Linear member 11 ... Clip 11a ... Clip body 11b ... Leg Part 14 ... Linear member

Claims (4)

[Claims] 1. A synthetic resin shell is integrally provided with a compressing portion having an engaging groove, and a linear member is provided on a mounting surface side of a cushion, and the linear member is used for the compressing force. The cushion is attached to the shell by being pushed into and engaged with the engagement groove of the portion, and both side walls of the engagement groove in the concavity portion are elastically formed by a bifurcated elastic material clip. A cushion mounting structure characterized in that it is configured so as to be able to urge it in a direction approaching to. 2. A clip body having a U-shape having a size capable of bypassing the engagement groove, and a clip body extending from both free ends of the clip body in a direction substantially parallel to the axis of the engagement groove. The cushion mounting structure according to claim 1, further comprising: a leg portion, wherein both side portions of the engagement groove can be held from outside by the both leg portions. 3. The cushion mounting structure according to claim 1, wherein the clip is an integrated product made of steel. 4. The action attachment structure according to claim 1, wherein the clip is an integrally molded product made of engineering plastic.