KR20030019492A - the back of a chair - Google Patents

Abstract

PURPOSE: A chair back is provided to make a chair frame molding more simple and easier and have a various designs for beautiful appearance through a simple process of molding. CONSTITUTION: The chair with a molded chair back frame includes an iron chair, legs of chair, a sitting plate(11), a chair back supporting frame(13) and a chair back(20). The mold for the chair back(20) has a top mold and a bottom mold respectively. The chair back(20) combines with the chair back supporting frame(13) through a welding process or by a bolt. After detaching the chair back(20) combined with the chair back supporting frame(13) from the mold, a part of the chair back supporting frame(13) is connected with the legs of chair and the whole chair is coated with a corrosion resistance material like a paint.

Description

Chair back {the back of a chair}

The present invention relates to a chair back. More specifically, in a steel chair in which a leg and a back support frame supporting a seat plate and a back support are made of steel, the backrest provided on the back support frame is made of resin such as urethane. It is intended to be molded integrally with the back support frame through a mold.

The backrest made of resin is combined with the supporting metal frame to improve the stability of the product, so that the durability and reliability of the product can be improved, and the backrest can be molded and manufactured by using a mold. Productivity is excellent because it is possible.

In addition, complex and various decorative expressions can be freely used on the surface of the backrest to enhance the aesthetics of the product.The characteristics of the backrest material provide excellent protection against damage to the surface and can be stacked by stacking chairs like ordinary steel chairs. It would be convenient for you.

Typically, the chair back serves to support the user's back by being installed on the seat plate, which is a part of the user's seat. The backrest installed on the iron chair, in which the legs and the back support frame are integrally welded, is usually backrest. Fasten the core panel between the support frames,

In order to provide comfort and comfort to the outside, it is made by covering the cushion member made of sponge or cotton and the outer finishing material made of natural leather or synthetic leather. It is not practical because it consumes time and manpower.

In addition, this cushion type structure is composed mainly of functions of comfort, so in order to give a separate decorative function, a limited planar area such as changing the color of the external finishing member or expressing a decorative pattern through printing embroidery or heat pressing on the surface thereof is provided. It was difficult to get out of the range of expression, so the decoration effect was insufficient and it was difficult to pursue high quality.

In addition, there is a wooden backrest is installed in the backrest support frame, but the productivity is lowered due to the nature of the material, it is difficult to combine with the steel backrest support frame and requires a separate structure for mounting.

In addition, due to the nature of the wood, the weight goes out and if excessive force is applied, the breakage is easy and the durability is weak, and there is a problem that the deformation or decay caused by moisture is caused.

In addition, wood is excellent in workability, which can give a three-dimensional decorative effect, but it must be made by hand, reducing work efficiency and causing an increase in manufacturing cost, making it impractical. Wood also has a weak surface strength, which easily damages surfaces and damages parts. It is clearly visible and results in a closure that leads to early replacement or repair.

The present invention is to solve and complement the problems caused by the existing chair back as described above,

An object of the present invention is to improve the stability of the product by improving the stability of the product by the combination of a metal support frame, including a molded backrest and legs made of resin.

Since the backrest can be molded and manufactured using a mold during manufacturing, it is easy to manufacture and mass production is possible, and the productivity is excellent.

In addition, complex and various decorative expressions can be freely used on the surface of the backrest to enhance the aesthetics of the product.The characteristics of the backrest material provide excellent protection against damage to the surface and can be stacked by stacking chairs like ordinary steel chairs. In providing a chair back for convenience.

In order to achieve the above object, the present invention is to make the backrest provided in the backrest support frame of the iron chair made of a resin such as urethane and molded integrally with the backrest support frame through a mold,

Hereinafter, described in detail with reference to the accompanying drawings as follows.

1 is a perspective view showing an example of the configuration of a chair to which the present invention is applied.

Figure 2 is a cross-sectional view of the A-A of Figure 1;

3 is a view for explaining the application of the present invention.

※ Explanation of code about main part of drawing ※

10: iron chair

11: seat

12: leg

13: back support frame

20: backrest

M: Back mold

1 is a perspective view showing an example of a configuration of a chair to which the present invention is applied, FIG. 2 is an exemplary cross-sectional view taken along the line A-A of FIG. 1, and FIG. 3 is a view for explaining the application of the present invention.

The present invention is a steel chair (10) having a seat plate (11) and a leg (12) and a back support frame (13) constituted by bending pipes, such as square or round, wherein the back support frame (13) The backrest 20 is integrally molded and manufactured through the backrest mold M using a resin (hereinafter described by applying urethane) as a material so that a part thereof is embedded therein.

The backrest mold (M) uses a pair of molds divided into an upper mold (M1) and a lower mold (M2). The mold of one side must be provided with a through hole so that a part of the back support frame 13 is exposed to the outside. The site is provided with sealing means (not shown) to prevent leakage of liquid urethane.

Mold (M) for molding a resin such as urethane is made of silicone material, which is a material that is easy to manufacture, such as wood or gypsum, such as the object to be molded once, the mold (M) of the object, that is, a pair of upper mold (M1) and lower mold (M2) is produced and used, and the resin used may include various kinds of resins that can be molded, including epoxy, but preferably the urethane resin is relatively durable in environments such as impact and temperature changes generated during manufacturing.

On the other hand Figure 3 shows an example of manufacturing the chair back 20 of the present invention, first to the portion to form the back 20 of the back support frame 13 separated before being combined with the leg 12 The support frame 13 is stably positioned in the mold M by combining the lower mold M2 and the upper mold M1 among the back molds M having the outer shape of the backrest 20 formed therein. The backrest 20 is molded in a state in which the back support frame 13 is firmly embedded in the back support frame 13 as shown in FIG. Will be.

Here, the chair back 20 of the present invention may be manufactured in a state in which the back support frame 13 and the legs are welded or fixed by coupling means such as bolts, and the backrest 20 is molded, or backrest (when manufacturing the backrest 20). 20) Before the molding, the surface treatment is performed by painting, etc. At this time, since the heat treatment is performed, the coupling of the cushioning material should be performed in consideration of the advantages.

Meanwhile, when curing is completed in the backrest mold M, the backrest 20 coupled with the backrest support frame 13 is demolded from the backrest mold M, and then a part of the backrest support frame 13 is removed from the leg of the chair. 12) is integrally welded and then combined and then painted and heat treated using a corrosion-resistant material such as paint, and the back chair 20 and the seat of the cushion material on the seat are completed.

On the other hand, if you want to express all the patterns or sculptures for the decorative effect on the backrest 20 to be molded, if the desired pattern or sculpture is imprinted on the inner surface of the backrest mold M in advance, the backrest 20 is simply molded. It is possible to give a decorative effect to the surface of the) so as to eliminate the hassle of giving a decorative effect by hand as before.

In the process of molding the urethane, which is the material of the backrest 20, the molding is performed in a state of not foaming, and in some cases, the foaming may be manufactured by foaming in a state in which a proper density is maintained so as to have appropriate elasticity and durability. If it is made of low density urethane foam, the overall supporting strength and surface strength will be weak, and it will be easy to be broken, making it impractical.

The backrest 20 of the present invention configured as described above is integrally coupled with the backrest support frame 13, which is a metal material, during the curing process, and does not require a separate coupling structure, and there is no fear of separation by external force because the coupling force is very strong. Excellent durability makes the product reliable.

As described above, the present invention is a support frame composed of the beauty of the backrest formed by the resin and the rigidity of the metal is combined with the good points of the resin and metal to be excellent stability with synergistic effect and durability and reliability of the product In addition, by forming and manufacturing the backrest using a mold, it is easy to manufacture, and mass production is possible, and the productivity is excellent, and the complex and various decorative expressions can be freely used on the surface of the backrest, so that the beauty of the product can be improved. It can be advanced, and because of the characteristics of the material has excellent protection against damage to the surface and can be stacked by stacking the chair like a general steel chair, it is a very useful invention having the effect of providing convenience to maintenance.

Claims (2)

In the well-known iron chair 10 provided with the seat plate 11, the leg 12 and the back support frame 13 comprised by the pipes, such as square or round shape; The backrest supporting frame (13), wherein the backrest is a chair back, characterized in that the backrest 20 made of resin integrally molded so that a part of the support frame (13) is embedded in the core. The method of claim 1, The resin backrest chair characterized in that the urethane.