KR200390553Y1 - Rotary chair leg - Google Patents

Abstract

The present invention relates to a leg for a rotary chair, and in particular, a plurality of arms are formed radially extending around a central boss formed with a shaft mounting hole in the center, and each arm end has a rotary chair leg in which casters are arranged. When the central boss and the radial arm are integrally injected through a mold, the metal ornaments are integrally inserted into the upper surface thereof, and the metal ornaments are directly formed of an aluminum plate or a stainless steel plate, or plated or etched on an iron plate. It may be molded after forming a glossy or pattern layer through, or may be injection molded with a synthetic resin material to form a glossy or pattern layer through metal plating on the surface.

Therefore, the strength and durability of the legs can be greatly improved, and the appearance of the product can be improved more beautifully, and the aesthetics can be improved by enhancing the aesthetics, and the production cost is easily reduced because it is easy to manufacture and does not require post-processing. It can be, and the metal ornament itself has a configuration that is integrally installed on the chair to completely prevent the metal ornament from being separated from the leg of the chair even if any external impact is applied during use.

Description

Swivel chair leg {Rotary chair leg}

The present invention relates to a swivel chair leg, in particular, when injection molding the swivel chair leg to significantly improve the strength and durability of the leg through a method of integrally injection molding by inserting a metal tool in the entire upper surface in advance It can be designed to enhance the appearance of the product can be given aesthetics as well as to enhance the appearance of the product, it is easy to manufacture and does not require post-processing, significantly reducing the production cost of the product.

In general, a chair includes a leg supported on the ground, a seat or seat portion horizontally coupled to comfortably support the buttocks of the seated person at the upper end of the leg, and a vertical support coupled to the bottom surface of the seat plate or seat portion to extend vertically; ; It is composed of a backrest is mounted to the upper end of the vertical support to comfortably support the back of the seated seat, some chairs are also provided with a headrest that is installed in the center of the upper surface of the backrest to support the head.

Recently, it has been improved to a functional form that conforms to the ergonomic aspect, and a plurality of casters are mounted on the bottom of the chair so that the chair can be freely moved in the seated position while rotating and seat, armrest, head Rotating chairs with a structure that is made easier and easier to adjust the height of the rest and the backrest are widely used.

Such a swivel chair (not shown) is widely used in various fields, and the basic structure thereof will be briefly described as follows.

First, the upper end is connected to the lower end of the seat plate is composed of a leg combined with the lower end of the height adjustment rod.

The end of the leg is inserted into the lower end of the height adjustment rod is extended and welded at one end in the set interval and direction to the outer peripheral surface of the fastener which is rotatably coupled to each other.

The legs are formed by bending the iron plate in the longitudinal direction and fitting the casters to the bottom of each end to be mutually fixed.

However, in the conventional swivel chair support leg to match a plurality of legs on the outer peripheral surface of the fixture with a set interval, and then weld and fix, equally and uniformly the interval of each leg and welding because each leg is fixed by welding The skill required for the process, the production was cumbersome, there is a limit of the overall productivity of the product, the production cost increases, and also had problems in the commerciality, reliability and the like.

In view of the problems of the rotary chair legs made of a metal material as described above, the whole leg is cast by aluminum, but there are also problems in manufacturing due to the defects in strength and material cost increase.

Therefore, by using the manufacturing process and productivity, such as productivity and relatively durable synthetic resin, it is relatively durable compared to metal materials, and it is cheap in terms of cost, and improves the defects such as deformation due to long use. Conventionally, utility model registration application No. 1989-0015234 and utility model registration application No. 1990-0002031 have been proposed as 'swivel chair legs'.

All of them are composed of arms and feet organically coupled by bosses, ribs and gussets that can optimally distribute the load applied to the center of the legs. While there is an advantage in preventing loosening or desorption, the following drawbacks exist.

First, the shaft mounting hole composed of the primary boss and the secondary boss in the center part in order to optimally distribute the load applied to the center of the leg is finely tapered at the lower end of the center bar coupled to the center of the lower surface of the seat of the chair. Since it is formed in the shaft can be easily and easily inserted into the inside of the shaft installation hole, the load is concentrated on the inner side of the primary boss at this time, so the crack occurs from the inner side of the primary boss in the long-term use secondary There is a drawback to the failure to deliver to the boss, the overall productability and reliability of the product.

The second method is to improve the quality and appearance of the supporting legs by injection molding using synthetic resin materials. Painting, plating, or wood texture to express various patterns and patterns on the entire outer surface or specific parts of the supporting legs. It is variously carried out such as veneer film thermal transfer treatment, but also the coating is peeled off by frequent contact with the seater's shoes or the surrounding furniture during use, further deteriorating the appearance and the product is cumbersome and inconvenient. There was a problem such as lowering the productivity of the rise as well as the cost.

Therefore, in recent years, as a way to solve the above-mentioned problems, a "swivel chair support leg" has been proposed as the Korean Registered Utility Model Publication No. 20-0360282.

By the way, as shown in Figure 1, the footrest of the swivel chair "A plurality of arms 102 are formed radially extending around the central boss 104 through which the shaft mounting hole 101 is formed in the center, respectively, A foot 103 having an axial coupling hole is formed at the end of the arm 102 of the arm 102 so that the casters are shaft-mounted. And a plurality of gussets are formed at a predetermined distance from the outer flange 109 of each arm 102, and a plurality of gussets are formed at appropriate intervals in the space between each of the main ribs and the flange 109. And arranging auxiliary ribs in the center of the arm 102 corresponding to the main ribs, respectively, between the inner surface of the foot 103 corresponding to the ends of the respective arms 102 and the outer boss outer surface having the shaft coupling holes for wheel coupling. Footjob in Lee In the conventional rotary chair support leg formed by arranging them radially, a metal reinforcing ring 116 is embedded in the inner surface of the shaft mounting hole 101, and the central reinforcement ribs are formed radially on the outer surface thereof. A central boss 104 formed with interconnected central reinforcement bosses, a plurality of arms 102 formed radially extending from the outer side of the central reinforcement bosses of the central boss 104 and having a stepped recess in the upper surface thereof; It is composed of a metal decorative plate 108 which is fitted inside the recess 107 of the arm 102 and is accommodated, and has a corresponding shape so that various patterns, shapes, colors, and the like are selectively expressed on the surface thereof.

In this case, the metal decoration plate 108 may express various patterns, shapes, colors, etc. on the upper surface by plating, painting, transfer treatment, and the like, and an appropriate amount of adhesive or adhesive tape is formed on the lower surface of the arm ( It can be fitted into the recess 107 of the 102 to secure the seating, the metal decorative plate 108, the coupling protrusions 115 extend a predetermined length at each corner, these coupling protrusions 115 inside the flange 109 And bent to each other to be firmly coupled to each other, the flange 109 is formed integrally on both sides of the lower end of the metal decorative plate coupling ribs (109B) and the coupling holes 109A are formed in the front and rear, respectively, The plurality of coupling pins 115A having elasticity are formed to be coupled to the coupling holes 109A so as not to be separated by being coupled to the coupling holes 109A near the bottom of both sides of the coupling protrusion 115. There is a castle.

Therefore, it is possible to increase the overall durability to a certain degree compared to the previous chair legs, and further work such as a separate coating or plating treatment for improving the quality of the product and improving the appearance and the like, or the transfer of the veneer film transfer treatment to obtain the wood texture. This eliminated the need for improved product performance and productivity, as well as cost savings.

However, this configuration has a problem that the overall aesthetics and durability of the swivel chair legs are deteriorated because the metal plate is not installed on the entire leg, but only on the upper surface of the arm, and on the arm, grooves, holes, and metal plate The coupling ribs are formed and the lower end of the metal decorative plate is formed to protrude and form a coupling protrusion that is engaged in the coupling hole, so that the metal decorative plate is disassembled and installed on the arm so that the productivity of the product is reduced and the production cost is reduced. Of course, there is a problem such that the metal decoration plate is automatically separated from the arm when a strong impact is applied to the arm during use.

The present invention has been devised to solve such a conventional problem, and when inserting the rotary chair legs by inserting the metal ornaments in advance on the entire upper surface portion (ie, the arm, the foot and the central boss), respectively. By forming it integrally, the strength and durability of the legs can be greatly improved, and the appearance of the product can be improved more beautifully, thereby improving the productability by giving aesthetics. It is an object of the present invention to provide a revolving chair leg which can be greatly reduced.

In the above object of the present invention, a plurality of arms are formed radially extending around the central boss formed through the shaft installation hole in the center, each arm end in the rotary chair leg is formed with the feet are formed casters, The central boss, the radial arm and the foot can be achieved by pre-inserting metal ornaments respectively on their upper surfaces during injection molding.

At this time, the metal ornaments may be directly press-molded with an aluminum plate or a stainless steel plate, or formed with an iron plate to form a gloss or pattern layer on the upper surface by plating or etching, or by injection molding with a synthetic resin surface. This can be achieved by forming a gloss or pattern layer through metal plating.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows an exploded perspective view of a chair leg according to the present invention, Figure 3 shows a partially enlarged side cross-sectional view of the arm of the leg according to the present invention, Figure 4 is a perspective view of a chair with a leg of the present invention is installed It is shown.

According to the present invention, a plurality of arms (2) are formed radially extending around the central boss (1) formed through the shaft mounting hole (11) in the center, each caster (4) at the end of the arm (2) In the leg for the rotary chair formed with the feet (3), respectively,

The upper surface of the central boss (1), the radial arm (2) and the foot (3) is inserted into the metal ornaments (5, 6) in advance, characterized in that integrally molded through an injection mold.

At this time, the metal ornaments (5, 6) are molded directly with a press mold or the like to correspond to the external shape of the central boss (1), the radial arm (2) and the foot (3) using an aluminum plate or a stainless steel plate. Or, it is molded into an iron plate, in the case of the iron plate is characterized in that the gloss or pattern layer 51 is formed on the upper surface through a plating or etching process so as to be beautiful.

In addition, the metal ornaments 5 and 6 may be injection molded from a synthetic resin material to form a gloss or pattern layer 51 through metal plating on the surface thereof.

Referring to the effect of the present invention configured as described above are as follows.

First, the main technical configuration of the present invention is the metal upper part of the upper surface of the leg, that is, the central boss (1) and the radial arm (2) and the foot (3), respectively, when injection molding the leg for the rotary chair ( 5, 6) is integrally injection molded by insert insert.

That is, prior to injection molding the leg for the rotary chair, the metal tool 6 having the shape corresponding to the shape of the central boss 1, the radial arm 2, and the foot 3 are integrally formed by using a press mold. The central bosses 1, the radial arms 2, and the feet 3 are formed by molding the metal fittings 5 each having a shape corresponding to the shape, inserting them into the injection mold and injecting the injection into the mold. It is molded to have a shape in which the metal ornaments (5, 6) are integrally inserted into the upper surface of the).

At this time, the metal ornaments (5, 6) may be used by directly molding using aluminum plates of various colors having a light weight and aesthetics of its own, and the stainless steel plate having a strong strength and its own gloss It may be used by direct molding, or may be used to form a gloss or pattern layer 51 by plating or etching the gold, silver, chromium, etc. on the surface after press molding using an iron plate.

In addition, the metal ornaments 5 and 6 may be injection molded with a synthetic resin material to form a gloss or pattern layer 51 through metal plating on the surface thereof.

Therefore, the material, gloss, or shape of the pattern layer 51 is not particularly limited.

On the other hand, if the metal ornaments (5,6) manufactured as described above are pre-installed in the injection mold, and the injection molding is injected into the mold to injection-molded the leg for the rotary chair, several arms (2) around the central boss (2) Are radially extended, and at the end of each arm 2, the foot 3, on which the casters 4 can be built up, is integrally injection molded and at the same time the central boss 1, the arm 2 and the foot ( As described above, the upper surface portion of 3) has a shape in which metal ornaments 5 and 6 having a shape corresponding to each shape are integrally molded.

When the metal fittings 5 and 6 are integrally formed on the upper surface of the central boss 1, the arm 2, and the foot 3 constituting the swivel chair leg, the strength and durability of the leg In addition to the significant improvement, the appearance of the product itself is more beautiful to enhance the aesthetics, and the production cost of the product can be greatly reduced because it is easy to manufacture and requires no post-processing, and the metal ornament (5, 6) itself Has a configuration integrally installed in the chair can completely prevent the metal ornaments (5,6) from being separated from the chair legs even if any external impact is applied during use.

The above-described embodiment is described with respect to the most preferred example of the present invention, but is not limited to the above embodiment, it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

As described above, according to the present invention, when molding the rotary chair leg by molding the metal ornaments integrally on the entire upper part of the upper part, that is, the central boss part, the arm, and the foot part, the leg strength and durability are greatly improved. It can improve the product appearance by giving aesthetics by making the appearance of the product more beautiful, and it is easy to manufacture and does not need post-processing, which can greatly reduce the production cost of the product, and the metal ornament itself is a chair It is a very useful design, such as having a molded integrally in the configuration to completely prevent the metal ornament from being separated from the chair leg even if any external impact is applied during use.

1 is an exploded perspective view of a leg of a conventional chair.

Figure 2 is an exploded perspective view of the chair leg according to the present invention.

Figure 3 is an enlarged side cross-sectional view of part of the arm of the present invention is implemented

Figure 4 is a perspective view of a chair with a leg of the present invention is installed.

Explanation of symbols on the main parts of the drawings

1: Central Boss

2: arm

3: foot

4: caster

5,6: Metal Ornament

11: shaft mounting hole

51: glossy or glyph layer

Claims (5)

In the rotary chair leg is formed with a plurality of arms radially extending around the central boss formed through the shaft mounting hole in the center, each of the arms end is formed with the feet are casters, Rotating chair leg, characterized in that the injection molding injection molding metal ornaments on the upper surface of the central boss, the radial arm and the foot. The method according to claim 1, The metal ornament is a rotary chair leg, characterized in that formed in two separate the upper surface of the central boss and the upper surface of the arm and feet. The method according to claim 1, The metal ornaments are rotating chair legs, characterized in that molded in one of aluminum plate or stainless steel and iron plate. The method according to claim 1 or 3, Swivel chair legs, characterized in that the upper surface of the metal ornament consisting of a steel plate further formed by a plating or etching process polished or patterned layer. The method according to claim 1, The metal ornaments are injection-molded with synthetic resin material to form a glossy or pattern layer through the metal plating on the surface of the rotary chair legs.