KR19990018729U - Support structure of casters - Google Patents

Abstract

The present invention relates to the support structure of the caster.

Caster structure comprising a support plate attached to the application device, a support attached to the bottom of the support plate, a movable table movablely attached to the lower end of the support, wheels installed on one side of the support and an elastic means provided on the other side. In the support is composed of a spring receiving body including a support body formed with two passage holes for passing through the center bolt and a spring receiving body including an upper surface formed with a spring fixing shaft hole for passing through the spring fixing shaft.

Therefore, since the main body and the spring receiving body are composed of one disc, the welding part is not required, which simplifies the manufacturing process, increases the manufacturability, increases the durability, and in particular, reduces the human cost by eliminating the welding work. It has the effect of greatly improving the working environment.

Description

Support structure of casters

The present invention relates to a caster, and more particularly, to a support structure of the caster that can improve the caster manufacturability and improve the durability by changing the shape of the support.

In general, casters refer to wheels attached to legs of trolleys, moving tables, and chairs. Such casters are used in hospitals, etc. as surgical equipment carriers or patient feeds, and are used for the movement of semi-finished or processed products in the middle of various process lines in factories, and their applications are widely used in all industries.

The basic structure of such a caster will be described with reference to FIGS. 1A, 1B and 2 as follows. Figure 1a is a perspective view showing a general fixed caster, Figure 1b is a perspective view showing a general rotary caster, Figure 2 is a side view showing a general caster.

The support plate 10 which becomes substantially square shape and has the fixing hole 12 in each corner part is provided. This support plate 10 is attached to the bottom of a main body (not shown) to which the caster is to be applied. Such attachment is usually used with a screwing method.

Two support members 20 are formed at both lower sides of the support plate 10, and at the lower end of the support plate 20, a working table (generally 'bracket') is screwed by using a central bolt 22. (30) is attached to the flowable.

See FIG. 2. The upper end of the support 20 is an arc bent inward as shown in FIG. 6 in order to be fixed to a circular ball race 16 containing a plurality of balls installed in the lower support plate 10 The welding portion 28 is shaped. Reference numeral 14 is provided at the center of the support plate 10, and is a high information bolt as a shaft for fixing the support plate 10 and the ball race 16 incorporating the plurality of balls.

Moreover, the "U" shaped spring receiving body 40 which is integral with the two connecting pieces 42 in the horizontal direction is extended from the middle part of the said support 20. As shown in FIG. Reference numeral 46 denotes an upper surface of the spring bearing body 40.

The two support 20 and the "U" -shaped spring receiving body 40 is attached to each other by a welding method.

On this spring receiving body 40, a spring 50 having a square cross section as a resilient means is elastically provided. Since the spring 50 includes a spring fixing shaft 52 penetrating the central hole portion and the lower end thereof is fixed to one side of the operating table 30, the spring 50 is the spring receiving body ( 40) is always pushed to the operating table (30) side.

The compression degree of the spring 50 can be variously set according to the specification of the caster, and when the load exceeding the set load is applied to the support plate 10, the spring 50 is to be compressed.

In addition, the spring 50 is operated while having elasticity during normal use, thereby providing a cushioning action to provide smooth running.

Reference numeral 60 is a wheel. The wheel 60 is made of a hard rubber material and includes a bearing member to increase the sliding property. Reference numeral 62 is a fixing bolt as a center rod for fixing the wheel 60.

Since the support plate 10, the two supporters 20, and the spring support body 40 are attached by welding in the manufacturing process of the conventional support 20, four elements must be welded. do. That is, the two support bases 20 on the lower both sides of the support plate 10 and the middle portion of the support 20 is welded "U" shaped spring receiving body 40 in the horizontal direction.

As a result, since these four elements must be treated by a welding process, a skilled worker is required and avoided because it is a 3D work, which leads to an increase in labor costs and a lot of manufacturing labor and a bad working environment.

In addition, since the equipment required for welding must be provided on-site, there is a problem in that the required cost of manufacturing is added.

The object of the present invention is to provide a support structure of the caster to improve the working environment and to provide a caster structure with high durability and good productivity by providing an integrated support that eliminates welding work in the manufacture of the caster.

Figure 1a is a perspective view of a typical fixed caster

Figure 1b is a perspective view of a typical rotary caster

2 is a side view showing a typical caster

Figure 3 is a rear view showing the caster adopting the support of the present invention

Figure 4 is an exploded view showing an expanded state of the support of the caster of the present invention

5 is an explanatory diagram showing the bending direction of the main body in the state of FIG.

Figure 6a is a perspective view showing the completed bending state of the support of the fixed caster of the present invention

Figure 6b is a perspective view showing the completed bending state of the support of the rotary caster is another example of the present invention

<Explanation of symbols for main parts of the drawings>

10: base plate 12: fixing hole

14: fixed bolt 16: ball race

20: support 22: center bolt

24: support body 25: hole

27: spring fixed shaft hole 28: welded portion

30: operating table 40: spring receiving body

42: connecting piece 46: top

50: spring 52: spring fixed shaft

54: nut 60: wheel

62: fixed bolt A: bend line

B: arrow

The support structure of the caster for achieving the above object includes a support plate attached to the application device, a support attached to the lower part of the support plate, a support movably attached to the lower end of the support plate, and a wheel installed at one side of the operating table; In the caster structure comprising an elastic means installed on the other side, the support table includes a support body formed with two passage holes for passing the central bolt and the upper surface formed with a spring fixed shaft hole for passing the spring fixing shaft The spring bearing body is made up of one piece.

Therefore, since the main body and the support part are composed of one disc, the welding part is not required, which simplifies the manufacturing process, increases the manufacturability, increases the durability, and in particular, reduces the human cost by eliminating the welding work. It has the effect of greatly improving the working environment.

Hereinafter, the support structure of the caster of the present invention will be described in detail with reference to FIGS. 3 to 6.

Figure 3 is a rear view showing the caster adopting the support of the present invention, Figure 4 is an exploded view showing a developed state of the support of the caster of the present invention, Figure 5 is an explanatory view showing the bending direction of the body in the state of Figure 4, Figure 6a Is a perspective view showing a bent completion state of the support of the caster of the present invention, Figure 6b is a perspective view showing a bent completion state of the support of the rotary caster of another example of the present invention.

The same parts as the conventional description will be described with the same reference numerals to simplify the description.

The support 20 of the present invention is formed by the body 24 and the upper surface 46 is integrally composed of one disc. That is, the upper surface 46 in which the support main body 24 on which two passage holes 25 for passing the center bolt 22 are formed and the spring fixing shaft hole 27 for passing the spring fixing shaft 52 are formed. It is composed in one piece.

The support 20 of the raw material state of this form is completed by bending in the direction of the arrow B shown in FIG. 5 along the bend line A in the unfolded state as shown in FIG. 4 and FIG.

In other words, the support 20 of the present invention is because the spring receiving body 40 including the main body 24 and the upper surface 46 is formed of a single disk, there is no need for a weld.

Therefore, since the symmetrical form is symmetrically formed on both sides with respect to the spring fixed shaft hole 27, when it is bent along the bending line A, the main body 24 and the upper surface 46 are bent at 90 degree angles. Thus formed state is the form shown in FIG.

The support 20 formed as described above is to assemble the other parts, for example, the center bolt 22 in the two holes 25, and the spring fixing shaft 52 in the spring fixing shaft hole 27, respectively. .

As described above, according to the support structure of the caster of the present invention, since the main body and the spring receiving body are composed of one disc, the welding part is not required, which simplifies the manufacturing process, increases the manufacturability and strengthens the durability. Since the welding work is omitted, the human cost can be reduced and the working environment is greatly improved.

Claims (1)

Caster structure comprising a support plate attached to the application device, a support attached to the bottom of the support plate, a movable table movably attached to the lower end of the support plate, wheels provided on one side of the support and an elastic means provided on the other side. To The support is a caster support structure, characterized in that the support body is formed integrally with the support body formed with two passage holes for passing the center bolt and the spring receiving body including an upper surface formed with a spring fixed shaft hole for passing the spring fixing shaft .