JP2003111637A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair in which a rubber material can be easily stretched without loosening and which gives a comfortable sitting feeling in the chair having cushioning properties on a seat by elasticity of the rubber material. SOLUTION: The chair 1 is provided with a seat 2A with a lower frame part 21 with a rigidity, the rubber material 22 being stretched in an approximately flat shape on the inside of this lower frame part 21 and an upper frame part 23 constituted into a separated body from the lower frame part 21 and covering at least the top part of the lower frame part 21 and the upper frame part 23 is made into a three-dimensional shape for taking a seat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair having a cushioning property on a seat surface by a tension material such as a net material.

[0002]

2. Description of the Related Art This type of chair usually has a seat having a structure in which a net material is stretched inside a frame. In the case of such a structure, since the net material has to be stretched uniformly, the frame portion often has a planar shape.

[0003]

However, when the frame portion of the seat is made flat, the presence of the frame portion often gives the seated person a feeling of stiffness.

For this reason, in the case where the frame portion made of synthetic resin is provided, the lower layer portion of the frame portion is made of a hard resin supporting the net material, and the upper layer portion is made of a soft resin. However, such a device has a problem in that the equipment and process for molding the frame part are more complicated than usual. Further, in such a structure, it is usual to insert the peripheral edge of the net material into the frame portion, but when insert molding is performed, heat is applied to the net material. Therefore, there is also a problem that the material of the net material is limited to a material that does not deteriorate or deform due to heat.

On the other hand, there is also one in which a net material is stretched over the frame portion by making the frame portion into a three-dimensional shape suitable for seating to reduce the rough feeling. However, in the case of such a configuration, for example, when the frame portion is curved at the front edge portion along the lower limb of the seated person, it is difficult to allow the net material to follow the curved shape. In order to solve such a problem, a device such as a backup member is provided at a required position of the net material. However, unless the design is done properly, the structure becomes complicated and the manufacturing becomes difficult.

[0006]

In order to solve the above-mentioned problems, the present invention provides a lower frame portion and an upper frame portion which are separate bodies from each other as constituent elements of a seat, and the lower frame member thereof. The role of holding the tensioning material such as the net material, and the role of realizing the shape suitable for sitting on the upper frame portion. That is, the chair according to the present invention is configured such that a lower frame portion having rigidity, a tensioning material stretched over the inside of the lower frame portion in a substantially flat shape, and the lower frame portion are formed separately from each other, and at least the lower frame portion is formed. The seat is provided with an upper frame part that covers the upper part of the above, and the upper frame part is set to a three-dimensional shape suitable for seating.

[0007] With such a structure, a chair in which the tension member can be easily stretched without slack by using the lower frame portion, while the contact surface between the seated person and the seat is suitable for sitting. It is possible to provide a chair that has a three-dimensional shape and is comfortable to sit on.

In order to further increase the degree of freedom of the tensioning material, it is possible to construct the lower frame part from metal and stretch the tensioning material over the lower frame part without applying heat.

[0009] In addition, as a concrete measure for improving the feeling at the contact portion with the seated person, the upper frame portion is made of a material softer than the lower frame portion, and further, the upper frame portion is made of olefin. It is also conceivable to use an elastomer product.

Further, in order to provide a chair that is comfortable to sit without giving the seated person a feeling of stiffness, the upper frame portion has a three-dimensional shape having a curved hanging part along the lower edge of the seated person on the front edge side. It is desirable to have a shape.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below.
A description will be given with reference to the drawings.

FIG. 1 is a perspective view showing a chair I according to this embodiment, and FIG. 2 is a right side view thereof. Also, FIG.
Shows an exploded perspective view of the seat 2.

The chair I according to the present embodiment includes connecting rods 41, 4 and 4.
It is composed of a pair of left and right leg portions 1 connected via 2, a seat portion 2 formed above the leg portion 1, and a back portion 3 formed behind the seat portion 2. Further, this chair I is a chair I whose seating surface has a cushioning property using a tension material 22 such as a net material.

The specific structure will be described in detail below.

The pair of left and right legs 1 are integrally formed by bending a round pipe member made of steel, and have a front leg 11 and a rear leg 12 standing upright from the floor, and the front and rear legs 11,
Base leg 1 formed continuously with the lower end of 12 as the base end
3 and 3. The base leg 13 extends in the front-rear direction, and a slide prevention member 131 is attached to the front-rear position at the lower end thereof.

The left and right legs 1 are self-supporting by being connected using the connecting rods 41 and 42. Specifically, a position slightly lower than the upper ends of the left and right front legs 11 is connected via a front connecting rod 41, and both rear sides are connected via a rear connecting rod 42 in which a central portion is curved so as to bulge outward. Leg 1
The two upper ends are connected.

As shown in FIG. 4, the seat portion 2 comprises a seat 2A forming a seating surface and a seat receiver 2B for receiving the seat 2A.

The seat 2A includes a lower frame portion 21 having a generally square V shape in plan view having an opening in the center, and a net-shaped tension member 22 stretched in a substantially planar shape inside the lower frame portion 21. The upper frame portion 23 that covers the upper portion of the lower frame portion 21 is provided, and the tension of the tension member 22 is used to ensure the cushioning property of the seat 2A.

The lower frame portion 21 is formed by bending a rigid metal, and has a rear frame portion that is slightly bulged outward along the shape of the rear connecting rod 42. Further, as shown in FIG. 4, the upward groove portion 211 is formed around the periphery by bending the peripheral edge upward. Further, the lower frame portion 21 has a substantially planar shape, and the tension member 22 can be easily and uniformly stretched.
That is, by using the pushing frame 212 having a substantially square V shape in plan view that fits the shape of the groove portion 211, the peripheral edge portion of the tension material 22 is sandwiched between the groove portions 211 provided in the periphery, so that heat is not applied to the tension material 22. The lower frame portion 21 can be stretched without slack.

The upper frame portion 23 is made of an olefin elastomer which is softer and more flexible than the lower frame portion 21, and has a generally square V shape in plan view having an opening at the center thereof. It covers the upper portion of the frame portion 21. Further, as shown in FIG. 2, its shape is a three-dimensional shape which is curved forward and adapted to seating. Also, this upper frame portion 23
Is a curved hanging portion 231 provided on the front edge side 23a along the lower limb shape of the seated person, a mounting portion 232 for mounting the upper frame portion 23 to the seat receiver 2B, and the upper frame portion 23 for the seat receiver 2
As shown in FIG. 5, the curved hanging portion 231 composed of a supporting portion 233 that is supported by B has a shape that smoothly hangs downward, and bulges slightly forward. It has a shape to

The mounting portions 232 are provided at four corners of the upper frame portion 23. As shown in FIG. 6, the mounting portions 232 are thicker and harder than other portions, and the inner portion thereof is screwed. The hole is opened.

The support portion 233 is supported by the seat receiving frame 24 and the connecting rods 41 and 42 which form the seat receiving 2B, and the seat receiving frame 24 and the connecting rods 41 and 4 are provided.
It has a concave portion that opens downward in accordance with the outer peripheral shape of the round pipe 2.

As shown in FIG. 4, the seat receiving member 2B for supporting the seat 2A mainly comprises a seat receiving frame 24 formed continuously from the front leg 11, and the seat receiving frame 24 and the connecting rods 41, 42 are provided. Lower frame holder 25 attached to
1, 252 and upper frame attachment pieces 261 and 262.

The seat receiving frames 24 are provided in a left-right pair and extend forward and backward toward the rear connecting rod 42 while inclining slightly downward toward the rear. Then, together with the front and rear connecting rods 41 and 42, a frame body having a substantially square shape in plan view is formed.

The lower frame receivers 251 and 252 are left and right lower frame receivers 251 attached to the inner surface of the seat receiving frame 24 and front and rear lower frame receivers 252 attached to the inner surfaces of the front and rear connecting rods 41 and 42. Composed of and. The lower frame portion 21 is held by the lower frame receivers 251 and 252.

The left and right lower frame receivers 251 are long in the front-rear direction and are formed by bending a metal plate into an L shape. More specifically, a holding piece having a horizontal surface,
The holding piece has one side edge as a base end and a regulation piece forming a vertical surface. Then, the left and right lower frame receivers 251
One side edge of the holding piece is used as a mounting side edge, and the seat receiving frame 2
It is fixed to 4 by appropriate means such as welding,
This restricting piece is used to restrict the displacement of the lower frame portion 21 in the left-right direction.

Further, the front and rear lower frame receiving members 252 are provided in pairs with respect to the front and rear connecting rods 41 and 42,
Similar to the left and right lower frame receiver 251, the metal piece is bent into an L shape to form a holding piece and a restricting piece. The front and rear lower frame receivers 252 hold the lower frame portion 21 and regulate the displacement in the front-rear direction. The front lower frame receiver 252 is in a state in which the lower frame portion 21 can be held at an appropriate height via a mounting piece continuously provided from one end of the holding piece.

As shown in FIG. 4, the upper frame attachment pieces 261 and 262 are provided with a front upper frame attachment piece 261 provided over the seat receiving frame 24 and the front connecting rod 41, the seat receiving frame 24 and the rear connecting rod 42. And a rear upper frame attachment piece 262 that is provided over.

As shown in FIG. 6 which is a sectional view taken along the line AA of FIG. 6, the front upper frame mounting piece 261 has a state in which its outer surface is brought into contact with the inner surface of the mounting portion 232 provided on the upper frame portion 23. As described above, the upright surface is slightly tilted rearward, and a screw hole is opened at the central position so that the front of the upper frame portion 23 can be screwed to the seat support 2B.

The rear upper frame mounting piece 262 is the front upper frame mounting piece 26.
In the same manner as in No. 1, to form a state in which the outer side surface of the mounting portion 232 provided on the upper frame portion 23 is brought into contact with the inner side surface thereof, a substantially horizontal plane is formed which is inclined rearward according to the inclination of the upper frame portion 23. A screw hole is opened in the central position of the upper frame portion 23 so that the rear portion of the upper frame portion 23 can be screwed to the seat receiver 2B.

The back portion 3 is constructed by mounting a backrest 32 on a back support rod 31 extending continuously from the rear legs 12.

Further, at the intermediate height position on the side portion of the backrest 32, a holding portion 321 is formed by providing a recess for exposing a part of the back support rod 31 so that the back supporting rod 31 can be handled.
An elbow (not shown) can be attached using the handle portion 321.

With the chair having the above-mentioned structure, the seat 2A
As a constituent element of the above, a lower frame portion 21 and an upper frame portion 23 which are separate from each other are provided, and the lower frame material 21 is caused to play a role of holding a tension material 22 such as a net material, and the upper frame portion 23.
The role of realizing a shape suitable for seating is achieved by using the lower frame portion 21 to realize a chair in which the tensioning material 22 can be easily stretched without slack, and yet the seated person and the seat 2A It is possible to provide a chair that is comfortable to sit by making the contact surface with the three-dimensional shape suitable for sitting.

Further, the lower frame portion 21 is made of metal, and the tension material 22 is stretched over the lower frame portion 21 without applying heat, so that the flexibility of the tension material 22 can be increased.

In addition, since the upper frame portion 23 is made of a softer material than the lower frame portion 21 or is made of an olefin elastomer, it is possible to improve the touch feeling at the contact point with the seated person. .

Further, since the upper frame portion 23 has a three-dimensional shape having a curved hanging portion 231 along the shape of the lower limb of the seated person on the front edge side 23a, the seated person does not feel rough and the chair is comfortable to sit on. I can be provided.

It goes without saying that the structure of the present invention is not limited to that described above. For example, in the present embodiment, the lower frame portion 21 is made of metal, but it may be made of other hard resin. Further, in the present embodiment, the tension member 22 is stretched over the lower frame portion 21 without applying any heat, but after stretching the lower frame portion 21, heat is applied to the tension member 22 to shrink the tension member 22, You may be able to stretch it more loosely. Also,
The material of the upper frame portion 23 is not limited to the olefin elastomer, and it may be possible to use urethane elastomer, for example. Other configurations can be variously modified without departing from the spirit of the present invention.

[0038]

As described in detail above, according to the present invention, a lower frame portion and an upper frame portion which are separate bodies are provided as constituent elements of a seat, and a tension material such as a net material is attached to the lower frame material. In addition to playing the role of holding, the upper frame part has a role of realizing a shape suitable for sitting, so that a chair that can easily stretch the tensioning material without loosening using the lower frame part is realized. However, it is possible to provide a comfortable chair by making the contact surface between the seated person and the seat 2A into a three-dimensional shape suitable for sitting.

The lower frame portion is made of metal,
By stretching the tension material over the lower frame portion without applying heat, the flexibility of the tension material can be increased.

In addition, by making the upper frame part softer than the lower frame part or by making it of olefin elastomer, it is possible to improve the touch feeling at the contact point with the seated person.

Further, the upper frame portion has a three-dimensional shape having a curved hanging portion along the shape of the lower limb of the seated person on the front edge side, thereby providing a comfortable chair without giving the seated person a rough feeling. it can.

[Brief description of drawings]

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

FIG. 2 is a side view showing the same embodiment.

FIG. 3 is a front view showing the same embodiment.

FIG. 4 is an exploded perspective view showing the same embodiment.

FIG. 5 is an exploded side view showing the same embodiment.

FIG. 6 is an enlarged cross-sectional view taken along the line AA showing the same embodiment.

[Explanation of symbols]

I ... Chair 2A ... seat 21 ... Lower frame 22 ... tension material 23 ... Upper frame 231 ... Curved hanging part

Claims (5)

[Claims] 1. A rigid lower frame portion, a tensioning material stretched over the inside of the lower frame portion in a substantially planar shape, and the lower frame portion which is formed separately and covers at least the upper portion of the lower frame portion. A chair comprising a seat having an upper frame part, wherein the upper frame part has a three-dimensional shape suitable for sitting. 2. The chair according to claim 1, wherein the lower frame portion is made of metal, and the tension material is stretched over the lower frame portion without applying heat. 3. The chair according to claim 1, wherein the upper frame portion is made of a material softer than the lower frame portion. 4. The chair according to claim 1, wherein the upper frame portion is made of olefin elastomer. 5. The chair according to claim 1, wherein the upper frame portion has a three-dimensional shape having a curved hanging portion on the front edge side that conforms to the lower limb shape of the seated person.