JP2001178585A - Shell body for chair or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a user from having unpleasantness due to an angular inner shell, improve the durability of an outer layer material. SOLUTION: By providing a slit 19 in the corner part 18 of an inner shell 7 elastic deformation of the corner part 18 of the inner shell 7 is made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shell for receiving body pressure of a person in a body support device such as a chair.

[0002]

2. Description of the Related Art Generally, both the back and the seat of a chair are provided with an inner shell made of a synthetic resin having a cushion material and a skin material (upholstery) stretched on the surface thereof. The shell is formed in a substantially rectangular shape.

Then, the inner shell and the cushioning material are attached to the outer shell by folding back the side of the inner shell and sandwiching the side edge of the outer shell from the front and rear with the side edge of the inner shell. With this configuration, the inner shell and the cushion material can be easily attached, and the design is excellent.

[0004] However, when the inner shell is folded, the corners become angular, so that when the back of the person hits the corners, there is a risk of discomfort. When a person leans on the backrest, the corners of the inner shell may be distorted. There is a problem that the skin material is easily torn because the skin material is stretched at the part.

[0005] In this regard, it is considered sufficient to wrap the corner portion of the inner shell with the cushion material. However, in this case, since the cushion material protrudes largely outside the inner shell, it is not only difficult to determine the outer shape of the cushion material. In addition, there is a problem that the appearance is not good, and the cushioning material is liable to be sagged.

An object of the present invention is to improve such a situation.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a synthetic resin shell in which a cushioning material and a skin material are stretched on a surface which receives human body pressure. Such a deformation facilitating means is formed.

[0008] The portion where the deformation facilitating means is provided may be selected as necessary. Further, as means for facilitating deformation, in addition to forming a slit or a hole to lower the strength, it is also possible to adopt a method of reducing the thickness of the edge of the shell body.

[0009]

According to the present invention, even if the corner of the shell body which receives the body pressure of the person is angular, the corner can be easily deformed, so that the body of the person becomes the corner of the shell body. Hitting the department does not cause any discomfort to the person.

Further, even if tension acts on the skin material due to the weight of the person, the tension is reduced by the deformation of the shell, so that the pulling force does not act intensively on a specific portion of the skin material. As a result, the durability of the skin material can be significantly improved.

Further, since it is not necessary to form the shell body smaller than necessary, the shape of the cushion material can be defined by the shell body. Therefore, the shape of the cushion material can be precisely aligned, and The sag of the material can be suppressed.

[0012]

Next, an embodiment in which the present invention is applied to an inner shell for the back of a chair will be described with reference to the drawings.

First Embodiment FIGS. 1 to 10 show a first embodiment, in which FIG. 1 is a side view of a chair and FIG. 2 is a partial front view.

As shown in these figures, the chair is
A seat receiving member 2 provided in the state of the leg 1, a seat portion 3 attached to the seat receiving member 2 so as to be able to retreat and tilt backward, and a swinging member 4a attached to the seat receiving member 2 so as to be tiltable rearward. 4b, and a backrest 5 attached to the rockers 4a, 4b.
The oscillating members 4a and 4b include a first portion 4a attached to the seat receiver 2 and a second portion 4b made of a round bar attached to the first portion 4a.

Next, the backrest 5 will be described with reference to FIGS.
Will be described. 3 and 4 are perspective views of an outer shell 6 constituting the backrest 5, FIG. 5 is a perspective view of an inner shell 7 constituting the backrest 5, and FIG.
6B is a view from the back side, FIG. 6 is a front view of the backrest 5 partially shown by a virtual line, FIG. 7 is a sectional view taken along line VII-VII of FIG. 6, and FIG. FIG. 9 is a sectional view taken along line IXA-IXA in FIG. 6, and FIG. 9 (B) is a sectional view taken along line IXB in FIG.
FIG. 10 is a sectional view taken along the line IXB, and FIG.

The outer shell 6 includes the second portion 4 of the rocking body.
a, and is formed in a forwardly concave shape as a whole in plan view. Then, on the left and right sides of the outer shell 6, three upper and lower first recesses 8 opened forward.
And two upper and lower second recesses 9 opened rearward, a first engagement hole 10 is formed in the bottom plate of the first recess 8, and a bottom plate of the second recess 9 is formed in the bottom plate of the second recess 9. A second engagement hole 11 is formed.

On the other hand, the inner shell 7 is configured such that the left and right side portions 7a are folded back so as to sandwich the side portion of the outer shell 6 from the front and rear. For this reason, the inner shell 7 is unfolded as shown in FIG. In this state, the width is wider than the outer shell 6. In FIG. 5B, a fold line is indicated by reference numeral 12. In addition, regulating pieces 13 are provided at both upper and lower ends in order to regulate the shape in the folded state.

As shown in FIGS. 5 and 9, a side edge of the back surface of the inner shell 7 outside the fold line 12 is folded back to form a first engagement hole of the outer shell 6. 10 is provided with a hook-shaped first engaging claw 14 which engages with and engages with the fold line 1 on the back surface of the inner shell 7.
A hook-shaped second engagement claw 15 that fits into and engages with the second engagement hole 11 of the outer shell 6 is provided at a position inside the second engagement claw 15.

Then, a cushion material 16 and a skin material (cloth) 17 are put on the surface of the inner shell 7, and the inner shell 7 is moved to the outer shell 6 with the skin material 17 wrapping around the edge of the inner shell 7. And the second engaging claw 15 is fitted into the first engaging hole 10 against elasticity, and then the side portion 7a of the inner shell 7
The inner shell 7 with the cushion 16 can be attached to the outer shell 6 by folding back and fitting the second engagement claw 15 into the second engagement hole 11 against elasticity.

The periphery of the skin material 17 is fixed to the inner shell 7 by bonding or the like. As shown in FIG. 8, both upper and lower edges of the skin material 17 extend toward the inside of the inner shell 7, and are fixed by an adhesive.

As shown in FIGS. 5 and 10, the upper end edge of the inner shell 7 is located at the periphery of the fold 12, in other words, at the location that becomes the corner 18 after folding.
As an example of the means for facilitating deformation, a left and right longitudinal slit 19 is formed.

By forming this slit 19,
Since the corner portion 18 of the inner shell 7 after being turned back has a reduced strength and is easily deformed, it does not give any discomfort even if it hits a person's back. When a person leans on the backrest 5, the skin material 17 is pulled and the corner 1
Although the hearing acts on 8, since the corner 18 is easily deformed, the concentration of the tensile force on the skin 17 at the corner 18 is reduced, and as a result, the durability of the skin 17 can be improved. .

{Other Examples} FIGS. 11 and 12 show other examples. These are applied to the inner shell 7 that is not a folded type, and are configured so that the corner portion 7b is easily deformed by making a hole 20 in the corner portion 7b.

<< Others >> Although the above embodiment is applied to the inner shell of the backrest, the present invention can be applied to the inner shell of the seat. Further, the deformation facilitating means does not necessarily need to be formed only at the corners, and can be widely applied to a part where a soft contact feeling needs to be obtained.

The present invention can be applied not only to the shell of a chair, but also to a shell used for another body support device, such as a shell of a bed.

[Brief description of the drawings]

FIG. 1 is a side view of a chair.

FIG. 2 is a partial front view of a chair.

FIG. 3 is a perspective view of the backrest outer shell as viewed from the front.

FIG. 4 is a perspective view of the backrest outer shell as viewed from the front.

5A is a perspective view of the inner shell in a deployed state as viewed from the front, and FIG. 5B is a perspective view of the inner shell in a deployed state as viewed from the back.

FIG. 6 is a front view of the backrest in a state where the cushion material and the inner shell are indicated by virtual lines.

FIG. 7 is a sectional view taken along line VII-VII of FIG.

8 is a sectional view taken along line VIII-VIII of FIG.

9A is a cross-sectional view taken along line IXA-IXA of FIG. 6, and FIG. 9B is a cross-sectional view taken along line IXB-IXB of FIG.

FIG. 10 is a perspective view of a main part.

FIG. 11 is a diagram illustrating another example.

FIG. 12 is a diagram showing still another example.

[Explanation of symbols]

 5 Backrest 6 Outer shell 7 Inner shell 10, 11 Engagement hole 14, 15 Engagement claw 12 Fold line 16 Cushion material 17 Skin material

Claims (1)

[Claims] 1. A synthetic resin shell in which a cushioning material and a skin material are stretched on a surface which receives a human body pressure, wherein an edge portion such as a corner portion is easily deformed by a slit or the like. A shell body for a chair or the like, forming a shell.