KR20020057487A - Foldding type Caster - Google Patents

Abstract

PURPOSE: A foldable caster is provided to reduce the height of an article as high as a height of the caster by folding the caster and simplify the keeping of the article without move by folding the caster, wherein the article is used safely by mounting a safety unit not to fold the caster already spread out unintentionally. CONSTITUTION: A foldable caster includes a wheel part(409) positioned on a bottom surface of an article and having a link part for spreading the wheel part for the sake of convenience in case of driving while folding the wheel part in case of keeping, a groove positioned on the bottom surface of the article for receiving the wheel part, and a safety unit(412) for preventing the wheel part from being folded to the contrary to the intension of a user while using the wheel part as the wheel part is spread.

Description

Folding caster {Foldding type Caster}

The present invention relates to a foldable caster, and more particularly, to a foldable caster that can be folded and stored inside the caster used for the movement of a large product such as a projection or a large television when the product is installed.

Today, with the development of technology for video media and the improvement of consumer's living standards, electronic products such as televisions are gradually increasing in size, unlike other electronic products, which have caused difficulties in product transportation and installation. In order to solve this problem, it is commercially available by installing casters on the bottom four corners of the product.

However, other problems occurred due to the caster for the convenience of transportation and installation. First of all, the height of the product increased due to the caster, and it was necessary to fix it using a separate wedge to prevent movement after the product was installed. Since the width of the caster is narrower than the width of the bottom support, the distance to the front support is shortened so that the conductance is weakened.

A conventional caster structure having such a problem will be described in detail with reference to the drawings.

1 is a schematic view showing a three side view of a conventional caster.

Referring to FIG. 1, the conventional caster includes a plate 101 having a shaft guide hole 101a and a supporting piece 101b at both ends thereof, and a shaft 106 having both ends thereof inflated through the shaft guide hole 101a. And a yoke including an upper part located between the lower end of the shaft 106 and the plate 101 and receiving a wheel 109 at a lower part thereof, and a steel ball 103 for smooth rotation between the plate 101. (104) and the cover 108 which is located between the yoke 104 and the lower end of the shaft 106 and inserts a steel ball 108 between the yoke 104 and smooth the rotation of the yoke, The yoke 104 is composed of a wheel 109 fixed to the rotation shaft 101 and the nut 110 in the lower portion.

The caster having such a structure is provided with the shaft 106, the steel ball 103 and the cover 108 and the shaft hole 105 on the yoke 104 so that the caster can easily change the direction according to the pushing direction. Formed. These casters are fixed to the product through the assembly holes 102 of the plate 101 using screws or bolts, so that the wheel can move at any time, so that a separate wedge must be used to prevent movement after installation.

2 is a schematic diagram of a large television equipped with a conventional caster.

Referring to FIG. 2, it can be seen that the overall height H is increased by the height H1 of the caster. This increase in height places constraints on the installation site, makes packing difficult, and brings aesthetic problems. Of course, there is a method of recessing the caster into the groove 201 of the product in order to solve this problem, but the minimum caster height required for the movement still has a limit that can only have.

3 is a schematic diagram showing a reduction in conduction of a large television equipped with a conventional caster.

Referring to Figure 3, the distance (D1) from the center of gravity 301 of the original product to the front support surface 302 of the product as the conventional caster mounted on the bottom of the product, the product front support at the center of gravity (301) of the product If the distance to the faced caster 302 'is shortened, this causes a problem of lowering of the conductivity.

In detail, theoretically assuming the extension line between the product's center of gravity 301 and the product's front support surface 302 (302 '), and when conducting a product conduction test, the angle of this extension line is 90 ° to the ground. When tilted above, the product can fall forward. In other words, the longer the horizontal distance from the front support surface 302 (302 ') of the product to the center of gravity of the product, the larger the angle of rotation (conduction angle) is required to reach the critical angle of 90 °, It will follow. As shown in FIG. 3, the conduction angle B of the product equipped with the caster is reduced compared to A, which is a problem directly related to safety, causing many specification problems.

The present invention was created in order to solve the above problems, it can be used when the product is moved and can be used to open and fixed when inserted into the product, while providing a beautiful aesthetics while improving the conductivity and do not require a separate fixing device. The purpose is to provide a folding caster.

1 is a schematic view showing a three side view of a conventional caster.

2 is a schematic diagram of a large television equipped with a conventional caster.

3 is a schematic view showing a reduction in conduction of a large television equipped with a conventional caster;

4 is a schematic view showing three views of a foldable caster according to the present invention.

Figure 5 is a schematic diagram showing a receiving process of the folding caster according to the present invention.

<Description of the symbols for the main parts of the drawings>

101, 401 ......... Plates 101a, 401a ... Shaft guide holes

101b, 401b ........... Supporting 102 .......... Assembly

103, 107, 402, 406 ... steel 104, 404 ..... yoke

105 ........ Shaft hole 106, 405 ..

108 .................. Cover 109, 409 ..... Wheel

110, 410 ........ Nut 111, 408 ..... Rotary shaft

201 ........................ Home of the product301 .......... Weight Center

302, 302 '............ Front Support Surface 403 .........

407 .............. Top Cover 411 .......... Top Stopper Plate

412 .................. Spring 413 ............. Lower cover

Folding caster according to the present invention in order to achieve the above object is located on the bottom of the product can be unfolded for convenience during transport, and the wheel portion is formed with a link portion to be folded for improved stability and conductivity during storage and It is characterized in that it comprises a groove which is located on the bottom of the product when the wheel is accommodated during storage, and a safety device for preventing the wheel portion from folding in spite of the user's intention while the wheel portion is unfolded and used. .

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

Figure 4 is a schematic diagram showing a three-sided view of the foldable caster according to the present invention.

Referring to FIG. 4, the folding caster according to the present invention includes a wheel part which is in charge of actual movement, a groove which is located at the bottom of the product, in which the wheel part is received during storage, and the user's intention during the use of the wheel part. It is composed of safety devices to prevent the wheel parts from folding.

In detail, the wheel portion has a plate 401 having a shaft guide hole 401a and a support piece 401b formed at both ends, and an upper locking plate across the shaft guide hole 401a of the plate 401. 411 and the lower locking plate 403 is formed a little less than the lower end of the shaft 405 and the lower end of the shaft 405 having a link structure that can be folded over the lower locking plate 403, An upper part is located between a lower end and a lower locking plate 403 of the shaft 405, and a yoke 404 for accommodating a wheel 409 at a lower part, and is located between the yoke 404 and a lower end of the shaft 405. Inserting the steel ball 406 between the yoke 404 and the lower cover 413 to facilitate the rotation of the yoke 404, and the rotation shaft 408 and the nut 410 in the lower yoke 404 A wheel 409 fixed between the plate 401 and the lower locking plate 403 of the shaft, By inserting a steel ball (402) between the root (401) it consists of a top cover 407 to facilitate the rotation of the yoke 404.

The groove is composed of the plate 401, and when the materials of the wheel portion are accommodated, the groove has an inner space that is not completely exposed from the exterior, and when it is unfolded, the groove is sufficiently exposed to facilitate movement. In addition, the wheel 409 is composed of two wheels for smooth rotation of the wheel during movement.

The safety device is composed of a spring 412, between the upper locking plate 411 of the shaft 405 and the upper portion of the plate 401 to prevent the wheel portion from folding when the product is moved, regardless of the user's intention. Is located.

Then, the process of receiving and opening the folding caster according to the present invention having the configuration as described above will be described with reference to FIG.

5 is a schematic view showing a storing process of the folding caster according to the present invention.

After opening and using the wheel to move the product to a desired position, it is stored in the plate 401 to improve stability and conductivity.

After installation, lay the product at an angle and secure some space on the side of the caster to be stored. Pulling the wheel portion downward by utilizing the secured space, the spring 412 between the upper surface of the plate 401 and the upper locking plate 411 of the shaft 405 is compressed, the wheel 409 Extends downward along the axis 405.

The shaft 405 is provided with a link capable of rotating 90 ° in the middle portion thereof, so that the wheel 409, which is extended, is folded into the groove secured in advance.

Through this process, the wheel part is not visible at all from the outside, thereby improving stability and conduction power, and also providing a beautiful environment.

The spring 412 is a kind of safety device. In order to prevent a safety accident or damage to the caster itself, which may occur due to free fall of the caster when the product is moved or tilted, the caster may be opened only according to the intention of the installer. And storage is possible.

The opening and closing process of the wheel part is performed in the reverse order to the above process, by straightening the bent intermediate link portion of the shaft 405 to make the shaft 405 straight, and using the restoring force of the spring 412 to make the shaft of the plate. What is necessary is just to push the said wheel part into the guide hole 401a.

As described above, the folding caster according to the present invention uses the cloud of the caster like the existing caster when the product is moved, but when the product is stored, the same structure as the product without the caster can be safely and comfortably stored.

As described above, the foldable caster according to the present invention comprises a wheel part having a foldable link, a groove for accommodating the wheel part, and a safety device for normal operation and safety, thereby making the caster essential for a large-sized television or the like. The height of the can be removed completely.

Therefore, as the height of the product is lowered by the height of the caster, not only can the size of the packing box be reduced, but also the installation space is less constrained by the height than the existing product during installation, and it is beautiful by storing the caster completely. Provide an environment.

In addition, since only the caster can be stored when stored in an inclined place, there is no need for crutches or wedges, and when storing the caster, it is the same as the structure without the caster, which has the advantage of improving conductivity.

Claims (5)

It is located on the bottom of the product and can be unfolded for convenience during transportation, and the wheel part is formed with a link part so that it can be folded for improved stability and conductivity during storage. Located in the bottom of the product grooves for storing the wheel portion at the time of storage, And a safety device for preventing the wheel from being folded regardless of the user's intention during the use of the wheel. The method of claim 1, The wheel portion plate and the support plate is formed in the shaft guide hole and both ends; A shaft having a lower end of the upper locking plate and a lower portion of the lower end of the lower guide plate which is foldable over the lower locking plate and formed at a lower portion of the upper locking plate across the shaft guide hole of the plate; The yoke is located between the lower end of the shaft and the lower engaging plate of the shaft and the yoke for storing the wheel in the lower, A lower cover positioned between the yoke and the lower end of the shaft to insert a steel ball between the yoke and to facilitate rotation of the yoke; A wheel fixed to the yoke by a rotating shaft and a nut, And an upper cover disposed between the plate and the lower locking plate of the shaft to insert a steel ball between the plate and the plate to facilitate rotation of the yoke. The method of claim 1, The groove is a foldable caster, characterized in that it has an internal space that is not completely exposed from the exterior when the material of the wheel portion is stored, and is configured with the plate that is fully exposed to facilitate movement when unfolded. The method of claim 1, The safety device is a folding caster, which is to prevent the wheel from being folded regardless of the user's intention when moving, and is located between the upper locking plate of the shaft and the upper plate and surrounds the shaft. The method of claim 1, Folding product caster, characterized in that the product is a large television.