JP3561827B2 - Seat body - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat body that can be used as a backrest or a seat of a chair, and more particularly to a seat body in which a core member that receives a load from a seated person is built in a cushion body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a cushion for a chair seat or a backrest, a multilayer structure of a hard synthetic resin layer and a soft synthetic resin layer has been used so as to obtain a good seating feeling (for example, Japanese Patent Publication No. 62-37998). ), And springs and other elastic bodies are provided between the frame and the skin material.
[0003]
[Problems to be solved by the invention]
However, among the conventional cushion bodies as described above, those having a multilayer structure require a large amount of expensive synthetic resin material, and increase the material cost. There is such a problem that the feeling is not given and the supporting strength enough to withstand the load of the seated person cannot be obtained.
[0004]
In the case where a spring or other padding is provided between the frame and the skin material, the assembling work thereof becomes complicated, and as a result, there is a problem that the manufacturing cost is high.
[0005]
The present invention has been made in view of the above-described problems of the related art, and provides a seat body that is inexpensive in material cost, has a good seating feeling and feel, is luxurious, and can withstand a large load. It is aimed at.
[0006]
[Means for Solving the Problems]
According to the present invention, the above-mentioned problem is solved as follows.
(1) Following a downwardly bag-shaped upper portion, a front cover portion and a rear cover portion that can be opened from each other are provided, and a frame serving as a core material of a seat body is fitted to the opposing surfaces of both cover portions. A cushion body formed with a recess that can be formed is put on the frame, the recess is fitted to the frame, and the cushion body is covered with a bag-like skin material. The front cover is closed by a closing means that can be opened and closed, and a front cover is attached to an intermediate portion of the fabric on the front side of the skin, and a lumbar support having substantially the same width as the skin is accommodated between the front fabric and the front cover. .
[0007]
(2) In the above item ( 1 ) , the closing means can be opened and closed.
[0008]
In any one of (3) above (1) or (2), the frame consisted of steel tube bent upward C-shaped, in its upper opening portion, mounting the spring member which expands and contracts in the horizontal direction.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In the embodiments described below, the present invention is applied to a seat body for a backrest of an office chair. FIG. 1 shows the entire chair (A), and FIG. 2 shows only the backrest (1). Is shown.
Figure 1 shows the attached seat support the chair main body (2) of Ru with legs with castors (3) and backrest (1).
[0010]
As shown in FIG. 2, the backrest (1) has a frame (4) both sides of with cushion body (5) of, in which further comprising a thereon Tsu covering with the skin material (6).
[0011]
Frame (4) as shown in Figure 3, substantially a main frame (7) consisting of steel tube bent upward U-shaped, is disposed below the side of the main frame (7), also generally upwardly U-shape And a sub-frame (8) made of a bent short steel pipe.
The sub-frame (8) has its lower end spaced upward from the lower end of the main frame (7), and both sides are welded to the left and right vertical rods (7a) (7a) of the main frame (7), Lord, in the center of the air gap between the bottom of the sub-frame (7) (8), a connection to the chair main body (2) steel plate (9) is attached by welding.
[0012]
The backrest (1) is attached to the chair body (2) by bringing the steel plate (9) into contact with the rear end of the chair body (2) and screwing it.
[0013]
The left and right Tate杆main frame (7) (7a) (7a) is both end portions of the two upper and lower steel pipe reinforcement rod facing the lateral direction (10) (10) is attached by welding.
As shown in FIG. 2, the reinforcing rods 10 are greatly curved to the back.
[0014]
At the upper end of the frame (4), the left and right vertical rods (7a) and (7a) are not connected but open upward. A spring member (11) suitable for an S-spring meandering up and down and expanding and contracting in the left-right direction is attached to the upper opening. The spring member (11) elastically supports the rearward load of the occupant added thereto.
[0015]
The cushion body (5) put on the frame (4) is a molded body molded into a shape as shown in FIG.
[0016]
As is apparent from FIGS. 4 and 2, the cushion body (5) is a two-folded shape including a front cover part (5a) and a rear cover part (5b), and these front and rear cover parts (5a) ( A recess (12) conforming to the shape of the frame (4) is formed inside 5b).
[0017]
In the upper portion (13) of the cushion body (5), the upper edge (13a) and the left and right side edges (14) are integrally formed in a front-rear shape to form a bag.
Although not shown, the recess (12) described above is of course also formed inside the bag-shaped portion.
[0018]
At the middle part (15) and lower part (16) of the cushion body (5) following the upper part (13), the left and right edges and the lower edge of the front and rear covering parts (5a) and (5b) are separated. A receiving portion (17) communicating with the bag-shaped portion is formed in the housing.
[0019]
A method of manufacturing such a cushion body (5) will be described with reference to FIGS.
First, a slab urethane (19) obtained by cutting urethane foam having cushioning properties into a sheet is laid in a molding recess (18a) formed on the upper surface of the lower mold (18) shown in FIG.
The recess (18a) of the lower mold (18) has a shape corresponding to the shape of the front side of the backrest (1), and slab urethane (19) cut in advance into a desired contour shape is laid therein. .
[0020]
Then, the chip material of urethane, water and urethane to react to heat and tip material (20) mixing well combined and adhesive, was uniformly sprayed over the slab urethane (19), the chip material ( The layer of 20) is formed.
Examples of the chip material include Scott foam chips such as cutting materials such as cushioning materials, cleaners, filters, etc., chips with skin such as urethane block epithelium and bottom skin, mold foam chips, mold vents and burrs, and three layers for vehicles. It is preferable to use a mixture of one or several chips with cloth, such as a cutting material of a laminate, having a relatively high density and ground to a particle size of about 5 mm.
[0021]
After the chip raw material (20) is put into the lower mold (18), the core (21) hinged to one end of the lower mold (18) is placed in the lower mold (18) as shown by an arrow in FIG. ) Into the recess (18a).
The core (21) has a shape substantially the same as the shape of the frame (4), and a partition member (21a) made of an iron plate having a thickness of about 2 mm that partitions the middle of the frame (4) into two. Have one.
[0022]
FIG. 7 shows a state in which the core (21) is lowered into the recess (18a) of the lower mold (18). As is clear from this figure, the core (21) is attached to the lower mold (18). ) Does not reach the other end of the recess (18a), that is, the left end, between the tip of the core (21) and the left end of the recess (18a) of the lower mold (18). Has a gap left.
[0023]
Next, the same chip material (20) as above is introduced again from above the core (21), and the same slab urethane (19) as above is laid thereon.
Thereafter, when the upper mold (22) is lowered onto the lower mold (18), a state shown in FIG. 8 is obtained.
[0024]
Steam is injected into the closed upper and lower molds (22) and (18) and heated to cure the adhesive in the chip raw material (20) and complete the molding. Then, the cushion shown in FIGS. The body (5) is formed.
[0025]
In the cushion body (5), the slab urethane (19) has a cushioning property, so that the chip raw material (20) is separated from the core (21) into the partition member (21a) side, that is, the storage part formed by being divided into two parts. It hardens while being pressed against the inside of (17) to form a hard chip urethane layer (23), the surface of which is covered with cushioning slab urethane (19).
[0026]
In the above manufacturing method, two upper and lower slab urethanes (19) and (19) are used, but this is made into one long piece, and the right half thereof is a recess (18a) of the lower mold (18). After the chip raw material (20) and the core (21) are mounted thereon, the left half may be folded back so as to cover them.
[0027]
Further, instead of the core (21), the frame (4) itself is mounted in the lower mold (18) and the cushion body (5) is molded, and then the cushion body (5) and the frame ( 4) The assembling work with 4) can be omitted.
[0028]
FIG. 5 shows a state in which the skin material (6) is put on the cushion body (5).
The skin material (6) is made up of a front fabric (6a) and a back fabric (6b) that are folded at the top, and a front covering fabric (24) is sewn in the middle of the front fabric (6a). Attached by (25),
Between the front side of the fabric (6a) and front drapes (24), the lumbar support having substantially the same width as the skin material (6) (26) is accommodated as shown.
Fasteners (27) as closing means are attached to the upper and lower edges of the left and right fabrics (6a) and (6b) on the front and rear sides.
[0029]
When assembling, the cushion body (5) shown in FIG. 4 is inserted into the frame (4) shown in FIG. Fit to the upper end of the main frame (7).
In this way, the recess (12) coincides with the frame (4) over the middle part (15) and the lower part (16).
[0030]
Finally, cover the skin material (6) and close the fastener (27) to complete the assembly.
[0031]
【The invention's effect】
As core material of the cushions body, it is possible to use the used urethane chip, it is possible to reduce material costs, the core material, while maintaining sufficient strength to withstand the load of the seated person, and the rigid Has a different moderate elasticity, and can cooperate with the urethane foam on the surface to provide a comfortable seating feeling and feel.
Further, since the core material is inexpensive and lightweight, the thickness of the core material can be increased, and the elasticity of the core material and the urethane foam on the surface can cooperate with each other to give a sense of quality.
[0032]
The frame can receive the cushion body and the load applied to it, and the front of the frame is covered with a core material made of hard chip urethane, so that you can not feel the presence of the frame when leaning, That is, it is possible to eliminate the feeling of hitting the frame, and to obtain a good contact feeling in combination with the cushioning property of the urethane foam on the surface.
[0033]
Frame and the cushion member and the assembly work can easily der Rutotomoni, both sides of the frame is covered by a cushion body can provide good seating of appearance and feel.
[Brief description of the drawings]
FIG. 1 is a side view of a chair in which the present invention is applied to a backrest.
FIG. 2 is a perspective view showing a backrest of the chair shown in FIG. 1 with a cushion body and a part of a skin material cut away.
FIG. 3 is a front view of a frame which is a core material of the backrest shown in FIG. 2;
FIG. 4 is a perspective view of the cushion body shown in FIG. 2;
FIG. 5 is a perspective view showing a state in which the skin material shown in FIG. 2 is put on a cushion body.
6 is a diagram illustrating an initial step of molding the cushion body shown in FIG.
FIG. 7 is a diagram illustrating a next step of molding the cushion body shown in FIG. 4;
FIG. 8 is a view illustrating a final step of molding the cushion body shown in FIG. 4;
FIG. 9 is a sectional view of the cushion body completed by the steps shown in FIGS. 6 to 8;
[Explanation of symbols]
(A) Chair
(1) Backrest
(2) Chair body
(3) Seat
(4) Frame
(5) Cushion body
(5a) Front cover
(5b) Back cover
(6) Skin material
(6a) (6b) Fabric
(7) Main frame
(7a) Vertical rod
(8) Secondary frame
(9) Steel plate
(10) Reinforcing rod
(11) Spring member
(12) recess
(13) Upper part
(13a) Top edge
(14) Side edge
(15) Middle part
(16) Lower part
(17) Housing section
(18) Lower mold
(18a) recess
(19) Slab urethane (urethane foam)
(20) Chip material
(21) Core
(21a) Partition member
(22) Upper type
(23) Tip urethane
(24) Front lining
(25) Sewing part
(26) Lumbar support
(27) Fastener

Claims (3)

A recessed portion having a front cover portion and a rear cover portion which can be opened to each other, and a frame which is a core material of a seat body can be fitted on opposing surfaces of both cover portions, following an upper portion having a downward bag shape. A cushion body formed with a place is placed on the frame, the recess is fitted to the frame, and the cushion body is covered with a bag-shaped skin material, and the opening edge of the skin material can be opened and closed. Closed by the closing means, and a front covering is attached to the middle part of the fabric on the front side of the skin material, and a lumbar support having substantially the same width as the skin material is accommodated between the front fabric and the front covering. And the seat body. 2. The seat body according to claim 1, wherein the closing means is an openable / closable fastener . 3. The seat body according to claim 1, wherein the frame is made of a steel pipe bent in an upward U-shape, and a spring member that expands and contracts in the left-right direction is attached to an upper opening thereof.

Images