JPH0810085A - Chair - Google Patents

Abstract

(57) [Summary] [Purpose] In a chair with a tilted backrest, the structure is simplified without reducing the appearance, and the number of parts and the number of assembly steps are reduced. A chair comprising an outer shell 3 having a seat-corresponding portion 31 and a backrest-corresponding portion 32, and a tilting device 2 for moving a seat 4 and a backrest 5 in conjunction with each other. It was used as a structural member for supporting the load acting on the seat 4 and the backrest 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair preferably used in offices and the like.

[0002]

2. Description of the Related Art Conventionally, as a chair integrated with a back seat, for example, an L-shaped inner shell in side view formed by integrally molding a seat-corresponding portion and a backrest-corresponding portion, and a backrest as a seat for supporting the inner shell. A tilting device that tilts in conjunction with each other is known. In this product, a cushion material is attached to the seat-corresponding portion of the inner shell to form a seat, and a cushion material is attached to the backrest-corresponding portion to form a backrest.The inner shell and the tilting device are provided outside the inner shell. An outer shell is installed to hide the mounting parts.

[0003]

However, in such a structure, both an inner shell having a relatively high strength and an outer shell subjected to a design treatment are indispensable. Therefore, it is difficult to reduce the number of parts, and there is a problem that a lot of man-hours are required for manufacturing and assembling the parts.

The present invention is not limited to the strength of the chair,
The purpose is to eliminate these problems.

[0005]

In order to achieve the above object, the present invention employs the following configuration. That is, the chair according to the present invention includes an outer shell having an L-shape in a side view, which integrally has a seat-corresponding portion and a backrest-corresponding portion, and a tilting device which moves the seat and the backrest in conjunction with each other or individually. It will be done,
The outer shell is a structural member for supporting a load acting on the seat and the backrest.

When the outer shell L-shaped in side view is an integrally molded product, in order to simplify the molding die and improve the fastening strength, the shaft center of the mounting hole provided in the outer shell is formed into the molding die. And the mounting surface of the tilting device is set to be orthogonal to the axis of the mounting hole, and the outer shell is fixed to the tilting device by a fastener such as a screw inserted in the mounting hole. It is desirable to wear it.

[0007]

With this structure, the outer shell serves as both the conventional inner shell and outer shell. Therefore, the inner shell is not essential. Even when an inner shell-like one is provided, it is not necessary to attach the shell to the tilting device by using screws or the like, so it is possible to form it integrally with the cushion, which simplifies manufacturing. You can

Further, if the mounting holes provided in the outer shell are provided in the above-described manner, the outer shell can be molded by a simple split mold and, at the same time, it has a high fastening strength even in a use state. Can be secured.
That is, since the backrest mainly receives a backward load, if a mounting hole is provided in the above direction, only the component force of the load will be pulled out or pushed into the fastener attached to this mounting hole. Since it acts as a force in the direction, a large pulling force or the like does not work directly. Further, if the mounting hole is provided in such a direction, it is possible to use a longer fastener than when the mounting hole is provided in the thickness direction of the outer shell. Therefore, it becomes possible to secure high fastening strength by combining these circumstances.

[0009]

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

This chair, as shown in FIGS. 1 and 2,
A leg 1, a tilting device 2 attached to the leg 1, an outer shell 3 fixed to the tilting device 2, and a seat 4 and a backrest 5 mounted on the front side of the outer shell 3 are provided. Become.

More specifically, in the leg 1, a pedestal 12 is provided upright at the center of a leg blade 11, and a tilting device 2 is attached to the upper end of the pedestal 12.

The tilting device 2 comprises a boat-shaped support base 21 supported on the pedestal 12, and a rear working point 22a and a front working point 22b which are positioned above the support base 21 and are oriented in the front-rear direction. The pivot point 22c set between the support base 2
1. The balance member 22 pivotally attached to the side wall of 1 and this balance member 22
A back support rod 23 provided at the rear portion, a downward U-shaped seat receiving portion 24 arranged in the front-rear direction along the balance member 22, and a support point 24a set on the rear end side of the seat receiving portion 24. Rear link member 2 for connecting the balance member 22 to the rear action point 22a of the balance member 22.
5 and a supporting point 24b set on the front end side of the seat receiving portion 24
And a front link member 26 for connecting to the front working point 22b of the balance member 22. Previous link member 2
Further, 6 is pivotally attached to the side wall of the support base 21 at a portion 26a that is displaced from both the front action point 22b and the pivot point 24b.

The behavior of the tilting device 2 will be described.
When a load F in the direction of the arrow in the figure is applied to the back support rod 23, the pivot point 22c of the balance member 22 is used as a fulcrum and then the action point 22
As a rotates downward, the front action point 22b rotates upward. At this time, the front link member 26 has the support base 21
Since it is pivotally attached to the front support member 24, the support point 24b is rotated counterclockwise in the figure with the pivot point 26a as a fulcrum to guide the seat receiving portion 24 connected to the front link member 26 forward and upward. To do. Then, the support point 24a on the rear end side of the seat receiving portion 24
And the rear working point 22a of the balance member 22 are the rear link member 2
Since the rear link member 25 is connected via 5, the rear link member 25 rotates counterclockwise while simultaneously satisfying those behaviors, and the support point 24a moves substantially horizontally forward as a whole.
As a result, the entire seat receiving portion 24 slightly tilts backward while advancing slightly forward, so that the seated person can have a comfortable posture. When the load applied to the back support rod 23 disappears, the tilting device performs a reverse operation to the above and returns to the initial state again.

As shown in FIGS. 1 to 3, the outer shell 3 is an L-shaped side view in which a seat-corresponding portion 31 and a backrest-corresponding portion 32 are integrally molded with resin. Box-shaped recess 33 for loading the device 2
Is formed. Then, the tilting device 2 is inserted into the recess 33, and the downward surface 33 a of the recess 33 is attached to the upper surface 2 of the seat receiving portion 24.
4c, so that the proper position on the front end side of the seat receiving portion 24 and the front end side of the seat corresponding portion 31 of the outer shell 3 are screw 71.
And a proper portion of the rear end side of the seat receiving portion 24 and the rear end side of the seat-corresponding portion 31 of the outer shell 3 with the reinforcing metal fitting 34 interposed therebetween. are doing. A screw 74 directly connects the reinforcing metal fitting 34 and the seat-corresponding portion 31 of the outer shell 3. An opening 35 is provided near the boundary between the seat-corresponding portion 31 and the backrest-corresponding portion 32 of the outer shell 3, and the back support rod 23 extends rearward from the balance member 22 of the tilting device 2.
Is inserted into the inner surface side of the outer shell 3 through the opening 35. The outer shell 3 is attached to the back support rod 23. Specifically, a mounting hole 36 is formed in the spine-corresponding portion 32 of the outer shell 3 so that the axial center m coincides with the split direction of the molding die, while the tip end of the back support rod 23 is formed. The metal fitting 27 having the mounting surface 27a orthogonal to the axis m of the mounting hole 36 is rigidly contacted in advance, and the screw 73 inserted through the mounting surface 27a is inserted into the mounting hole 36, whereby the outer shell 3 The backrest corresponding part 32 is fixed to the back support rod 23 of the tilting device 2. That is, in the outer shell 3, the seat corresponding portion 31 is the seat receiving portion 24 of the tilting device 2, the front and rear link members 25 and 26, and the balance member 22.
Is supported by the support base 21 via the backrest corresponding portion 3
2 is a support base 2 via a back support rod 23 and a balance member 22.
It is supported by 1 and functions as a structural member that supports the load acting on the seat 4 and the backrest 5.

The seat 4 and the backrest 5 are integrally molded, and as shown in FIG. 4, a cushion material 61 formed of urethane foam and a resin material for supporting the lower surface and the back surface along the cushion material 61. A backing plate 62,
The cushion material 61 is provided with a surface material 63 which covers the front surface side and has its periphery wrapped around the back surface of the backing plate 62 and fixed by a tacker. The backing plate 62 has ribs 31 formed on the seat corresponding portion 31 and the backrest corresponding portion 32 of the outer shell 3.
a and 32a, the engaged portions 62a to 62g formed on the back surface at the positions are supported by the outer shell 3
Are engaged with the engaging portions 37a to 37g formed on the front surface of the.
That is, the attachment of the seat 4 and the backrest 5 to the actor shell 3 is completed at this position.

With the above-mentioned structure, the outer shell 3 functions as a structural member that not only adjusts the design appearance but also supports the load applied to the seat 4 and the backrest 5, and is the same as the conventional inner shell. It will play both roles of the outer shell. Therefore, the inner shell is not required as an essential component, and the number of parts can be reduced, and the number of man-hours associated with part production and assembly can be reduced accordingly. Backing plate 6 of the above embodiment
Although 2 is like an inner shell, the plate 62 does not need to be attached to the tilting device 2 using screws or the like, and simply serves as a medium for attaching the seat 4 and the backrest 5 to the outer shell 3. However, since it is only possible to integrally form the urethane foam using urethane foam or the like, it does not hinder the simplification of production which is the effect of the present invention.

Further, a mounting hole 3 provided in the outer shell 3
If the axis m of 6 is made to coincide with the splitting direction of the molding die as described above, it is not necessary to provide a complicated movable part or the like in the die for molding the outer shell 3, and the die can be simplified. And cost reduction,
A high fastening strength can be secured in the use state. That is, in this embodiment, the outer shell 3 is attached to the back support rod 2.
3 must be attached. At this time, if the back support rod 23 is attached to the back surface of the shell 3 as in the conventional inner shell, the appearance is impaired. Therefore, as described above, the backrest corresponding portion 32 is fixed to the back support rod 23 on the front surface side of the outer shell 3. However, when a load is mainly applied to the back support rod 23 in the direction of the arrow in the figure, the shaft center m of the mounting hole 36 has a constant angle with respect to the direction of the load in the present embodiment, so this mounting is performed. Only the component force of the load acts on the screw 73 inserted in the hole 36 as a force in the pulling-out or pushing-in direction, and a large pulling-out force is not directly exerted. Further, if the mounting hole 36 is provided in this direction, the wall thickness of the shell 3 can be more effectively utilized as compared with the case where the mounting hole is provided in the thickness direction of the outer shell 3, and the screw 73 can be made longer. It becomes possible to do. Therefore, in combination with these circumstances, it becomes possible to secure high fastening strength between the mounting surface 27a and the outer shell 3, and even if the structure of the chair is simplified as described above, safety and durability are effective. It becomes possible to raise to.

The specific construction and sectional shape of each part are not limited to those shown in the illustrated embodiment, but various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the tilting device is configured to interlock the seat and the backrest, but it goes without saying that the present invention can also be applied to a chair with a tilting device configured to be individually movable.

[0019]

As described in detail above, the chair of the present invention has the following features.
The outer shell that adjusts the appearance has a function as a structural member that supports the load applied to the seat and the backrest. Therefore, it is possible to reduce the number of parts required for manufacturing a chair, and to reduce the number of man-hours involved in parts production and assembly. In particular, if the axis of the outer shell mounting hole is aligned with the split direction of the molding die and the mounting surface of the tilting device is oriented in a direction orthogonal to the axis of the mounting hole, the simplification of the die is simplified. Besides, it is possible to secure a high fastening strength between the fastening device and the mounting hole, and it is possible to effectively enhance the safety and durability of the chair.

[Brief description of drawings]

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

FIG. 2 is a side sectional view of the outer shell side of the embodiment.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a partial side sectional view of a seat and a backrest of the same embodiment.

[Explanation of symbols]

 2 ... Tilt device 3 ... Outer shell 4 ... Seat 5 ... Backrest 27a ... Mounting surface 31 ... Seat corresponding portion 32 ... Backrest corresponding portion 36 ... Mounting hole 73 ... Fastener (screw) m ... Shaft center

Claims (2)

[Claims] 1. A chair comprising an outer shell having a seat-corresponding portion and a backrest-corresponding portion, and a tilting device for moving the seat and the backrest in conjunction with each other or individually. A chair characterized by being a structural member for supporting a load acting on a seat and a backrest. 2. A side view L in which an outer shell is integrally molded.
It is a letter-shaped type, and the shaft center of the mounting hole provided in this outer shell is aligned with the split direction of the molding die, and the mounting surface of the tilting device is set to be orthogonal to the shaft center of the mounting hole. 2. The chair according to claim 1, wherein the outer shell is fixed to the tilting device by a fixing tool such as a screw inserted in the hole.