KR101964847B1 - Supporting device - Google Patents

Abstract

According to the present invention, a supporting device is coupled to a lower portion of a random object to support the object from the ground, and a spherical ball is taken out of the supporting device. In either case, sliding friction in accordance with rotation of the ball is converted into rolling friction to reduce resistance caused by movement of the object. In another case, the ball is covered to support the object in an immovable state. The present invention can reduce resistance caused by movement of the object by taking out the spherical ball from the supporting device when moving the object, and converting the sliding friction into the rolling friction in accordance with rotation of the ball.

Description

Supporting device

The present invention relates to an apparatus and a method for controlling a movement of an object by moving a spherical ball to the outside of a supporting device and changing a sliding friction caused by rotation of the ball to a rolling friction, And in other cases, the balls are covered to support the object in a floating state.

For example, when a wheel is attached to the bottom of an existing object, it is troublesome to lay the object at an angle, and it is difficult to move the object by the force of the person alone. In addition, the conventional wheel-type rolling device of an object is a cause of noise in a place where a lot of objects are arranged due to friction due to the rotation axis of a wheel or a rotating part of a rolling device.

Korean Utility Model Provisional Publication No. 88-6211 discloses that an annular cap formed by hemispherically assembling upper and lower bodies is provided with a recessed portion on the inner circumferential surface of the upper body so that a plurality of rolling balls are inserted therein, However, this is a design for the purpose of rotation only, and it is not suitable for an object to be fixed after the arrangement.

Korean Utility Model Registration No. 20-214161

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the resistance of the object by moving the spherical ball to the outside of the supporting device and changing the sliding friction due to the rotation of the ball to rolling friction.

SUMMARY OF THE INVENTION An object of the present invention is to cover a spherical ball inside a supporting device when an object needs to be floated, thereby raising the friction between the supporting device and the ground.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

The holding device includes: a ball receiving portion for receiving a ball to be rotated; And a ball concealing part which is rotated and engaged with the ball receiving part, wherein the ball receiving part comprises: a body part; A ball supporting portion disposed on one surface of the body portion and including a groove into which a part of the ball is inserted; A first clearance hole located on an outer wall of the ball supporting portion; A protrusion having one surface abutted against the outer wall of the ball support portion and the other surface abutting against the one surface of the body portion; A bolt portion accommodating the ball therein and having a screw formed on the outer side thereof; A ball portion formed in the ball receiving portion and receiving the ball; A ball receiving portion on which the ball received in the hollow portion is seated; A second clearance hole located on an outer wall of the bolt portion; A protrusion receiving portion for receiving the protrusion when the ball supporting portion is inserted into the bolt portion; And a pole penetrating the first through-hole and the second through-hole when the ball supporting portion is inserted into the bolt portion.

Wherein the ball concealment portion includes a nut portion having a screw formed therein and fastened to the bolt portion; An extension forming part extending from one surface of the nut part and having a screw formed therein; A first latching protrusion protruding from the outer side wall of the extension forming part; A support portion for receiving the extension forming portion therein; And a second latching jaw that pushes the first latching jaw in a direction parallel to a direction in which the extending portion is inserted when the extending portion is inserted into the support portion beyond a reference distance. .

In the present invention, when an object needs to be moved, a spherical ball is moved out of the support device, and sliding friction caused by the rotation of the ball is changed into rolling friction, thereby reducing resistance due to movement of the object.

In the present invention, when an object needs to be floated, the spherical ball is covered inside the support device, thereby increasing the friction between the support device and the ground.

The effects of the present invention are not limited to the above-mentioned effects, and various effects can be included within the range that is obvious to a person skilled in the art from the following description.

1 is a perspective view of a support device.
2 is an exploded perspective view in which a ball receiving portion and a ball concealing portion of the support device are separated.
3 is an exploded perspective view of the ball receiving portion.
4 is an exploded perspective view of the ball cloaking portion.
Fig. 5 shows a ball receiving portion and an object connectable to the upper portion of the ball receiving portion.
Figure 6 shows a support device and an object engaged with the support device.
Figs. 7 (a) to 7 (c) show cut surfaces according to the degree of engagement of the ball concealment portion with the ball receiving portion.
8 is a front view of the supporting device in a state where the ball receiving portion and the ball concealing portion are fully engaged.
9 is a perspective view of the support device in a state in which the ball receiving portion and the ball concealing portion are fully engaged.
10 is a front view of the support device in a state in which the ball is covered by the ball concealment portion.
11 is a front view of the support device in a state in which the ball is covered by the ball concealment portion.
12 is a perspective view of the support device in a state in which the ball is covered by the ball concealment portion.
Figure 13 shows the process in which the extension forming part is inserted into the support part.
Fig. 14 shows a state in which the extending portion is inserted and fixed into the support portion.
Figure 15 shows a controller coupled to a support device. 16 is a block diagram of the controller.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements. In the drawings, like reference numerals are used throughout the drawings. In addition, " including " an element throughout the specification does not exclude other elements unless specifically stated to the contrary.

As used herein, the term " block " refers to a block of hardware or software configured to be changed or pluggable, i.e., a unit or block that performs a specific function in hardware or software.

1 is a perspective view of a support device 1. Fig. 2 is an exploded perspective view in which the ball receiving portion 10 and the ball concealing portion 40 of the support device 1 are separated. 3 is an exploded perspective view of the ball receiving portion 10. Fig. 4 is an exploded perspective view of the ball concealing portion 40. Fig.

The supporting device (1) comprises a ball receiving portion (10) for receiving a ball (50) to be rotated; And a ball concealing part (40) which is rotated and engaged with the ball receiving part (10), wherein the ball receiving part (10) comprises a body part (27); A ball support portion 21 disposed on one side of the body portion 27 and including a groove 23 into which a part of the ball is inserted; A first clearance hole 25 located on an outer wall of the ball supporting portion 21; A protrusion 26 whose one surface is in contact with the outer wall of the ball support 21 and the other surface of which is in contact with one surface of the body 27. The ball 50 is received therein and the first screw 33, A bolt portion 30 formed on the base portion 30; A void portion 31 formed in the ball receiving portion 37 to receive the ball 50; A ball receiving portion 37 on which the ball 50 accommodated in the hollow portion is seated; A second clearance hole 35 located on the outer wall of the bolt portion 30; When the ball supporting portion 21 is inserted into the bolt portion 30, the protrusion receiving portion 36 receives the protrusion 26; And a pawl 53 passing through the first through-hole 25 and the second through-hole when the ball support 21 is inserted into the bolt 30.

The support device 1 is coupled to any object to support the object from the ground. The object may be, but is not limited to, a support shaft coupled with a pedestal of the shelf. The base of the shelf is supported under the object to mount an object, and the support shaft is an axis vertically connected to the base so that the base is disposed parallel to the ground. The supporting device 1, which is coupled to the lower part of the object such as the support shaft, facilitates the movement and fixing of the object.

The supporting device (1) comprises a ball receiving portion (10) for receiving a ball (50) to be rotated; And a ball concealing part 40 which is rotated and fastened to the ball receiving part 10. 1 and 2, the ball receiving portion 10 and the ball concealing portion 40 are joined or separated. Whether the ball can be rotated or not can be determined according to the degree of engagement between the ball receiving portion 10 and the ball concealing portion 40.

The lower portion of the ball receiving portion 10 and the upper portion of the ball concealing portion 40 are sometimes in contact with each other or separated from each other. That is, the lower portion of the ball receiving portion 10 and the upper portion of the ball concealing portion 40 are likely to be damaged due to friction. Thus, a sealing material is formed on the lower surface of the ball receiving portion 10 and on the upper surface of the ball concealing portion 40. 2, a sealing material is formed on the lower surface of the ball receiving portion 10, but it is not shown that the sealing material is formed on the upper surface of the angular ball covering portion 40 of FIG. However, it is apparent that a sealing material is also formed on the upper surface of the ball concealing portion 40.

Accordingly, the sealing material 61 according to the present invention is preferably formed of a sealing composition comprising a silicone resin, molybdenum disulfide, copper powder and sodium silicate.

The silicone resin is a binder resin for forming the composition of the sealing material 61. The silicone resin has a molecular structure in the form of a siloxane bond (Si-O bond) in which silicon and oxygen alternate, and silicon has a group of a methyl group, a phenyl group, Lt; / RTI > Silicone resins are commercially available or can be prepared by methods well known in the art, for example, by reacting metal silicon with methyl chloride at about 300 DEG C using a catalyst, dimethyldichlorosilane, methyltrichlorosilane or A mixture of these is obtained, and a silicone resin produced by hydrolysis thereof can be used.

Molybdenum disulfide (MoS ₂ ) is found in thin veins in minerals and is mined and used as a lubricant. Molybdenum disulfide (MoS ₂ ) has inherent properties of a hexagonal crystal structure in which shear is likely to occur, such as graphite, but the lubricating action is superior to that of graphite. The molybdenum disulfide is preferably contained in an amount of 10 to 20 parts by weight based on 100 parts by weight of the silicone resin based on the solid content. When the amount of the molybdenum disulfide is less than 10 parts by weight, the abrasion resistance can not be improved effectively, and when it exceeds 20 parts by weight, the adhesion of the sealing composition may be deteriorated. If the adhesiveness of the sealing composition deteriorates, it is difficult for the sealing material 61 to be fixed to the surface of the roller.

The copper powder is used as a lubricating component such as molybdenum disulfide, and is preferably used together with molybdenum disulfide. The copper powder can reduce the anti-wear and anti-friction properties of the sealing material 61, which is produced by forming a self-lubricanting and self-repairing coating film on the friction surface. The copper powder is preferably an auxiliary component of the lubricating component and is contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the silicone resin based on the solid content. When the amount is less than 1 part by weight, the effect of improving the abrasion resistance by the copper powder can not be obtained. When the amount is more than 5 parts by weight, there is a concern that the mixing property of the sealing composition may be inhibited.

Sodium silicate is used to improve adhesion to roller surface. It does not cause pollution unlike existing adhesives and is environmentally friendly and has excellent adhesion. The sodium silicate is preferably contained in an amount of 20 to 30 parts by weight based on 100 parts by weight of the silicone resin based on the solid content. When the amount of sodium silicate is less than 20 parts by weight, adhesion performance may be deteriorated. When the amount is more than 30 parts by weight, there is a fear that abrasion resistance may be lowered.

The sealing composition may further include an additional auxiliary component for enhancing the function of the sealing material 61. That is, it may contain antimony oxide (Sb ₂ O ₃ ) to improve heat resistance, may include clay to improve durability, and may include silica airgel to improve heat insulation.

The antimony oxide is used for improving the heat resistance and the thermal expansion coefficient of the sealing material 61 and is preferably contained in an amount of 5 to 10 parts by weight based on 100 parts by weight of the silicone resin based on the solid content. If the amount of the antimony oxide is less than 5 parts by weight, the coefficient of thermal expansion can not be sufficiently reduced, and if it exceeds 10 parts by weight, the mixing property of the sealing composition may be impaired. Friction heat may be generated as the roller continuously rotates in contact with the substrate, so that the sealing material 61 formed on the surface of the roller must have high heat resistance.

Clay is an aggregate of fine hydrated silicate minerals. It is used to strengthen the durability of the sealing material 61 as a material which is mixed with an appropriate amount of water and kneaded to produce plasticity, shows rigidity when dried, and sintered at high temperature. Concretely, clay may use kaolinite and / or bentonite, and it is preferable to mix kaolinite and bentonite in a weight ratio of 1: 1 in order to obtain the best effect. The clay is preferably contained in an amount of 1 to 3 parts by weight based on 100 parts by weight of the silicone resin on a solid basis. If it is less than 1 part by weight, the durability enhancement effect by clay can not be obtained. If it exceeds 3 parts by weight, the mixing property of the composition of the sealing material 61 is impaired and the sealing material 61 may not be effectively produced.

Silica aerogels have a high surface area (500 to 1,200 m ² / cm ³ ), many nanopores (88 to 99.8%), low density (~ 0.003 g / cm ³ ) and high thermal barrier properties (0.005 W / Gel method and is used to improve the heat insulating property so that the sealing material 61 does not transmit heat due to friction with the inner wall of the chamber 10 to the plunger 20. [ The silica airgel is preferably contained in an amount of 5 to 15 parts by weight based on 100 parts by weight of the silicone resin based on the solid content. When the amount of the silica airgel is less than 5 parts by weight, a sufficient heat insulating effect can not be obtained. When the amount is more than 15 parts by weight, the durability of the sealing material 61 may be deteriorated.

Hereinafter, the structure and effect of the present invention will be described in more detail with reference to specific experimental examples.

[Production Example 1]

100 parts by weight of silicone resin, 15 parts by weight of molybdenum disulfide, 3 parts by weight of copper powder and 25 parts by weight of sodium silicate were mixed to prepare a sealing composition.

[Production Example 2]

8 parts by weight of antimony oxide, 2 parts by weight of clay (mixture of sea salt and bentonite in a weight ratio of 1: 1) and 10 parts by weight of silica airgel were further added to prepare a sealing composition.

[Experimental Example 1: Abrasion resistance test]

The sealing compositions of Production Examples 1 and 2 were coated on the roller surface and dried to form the sealing material 61. After the substrate transferring operation was performed for 24 hours, the appearance of the sealing material 61 was evaluated. The results are shown in Table 1 below, and the criteria were O (almost no signs of wear),? (10% to 30% wear), and X (wear of 30% or more).

[Table 1]

As shown in Table 1, the sealing material 61 of each of Production Examples 1 and 2 was in a good condition, but it was judged that the sealing material 61 of Production Example 2 was more excellent in abrasion resistance.

[Experimental Example 2: Heat resistance test]

A phosphate layer was formed with an amount of 3 g / m ² on the electroplated galvanized steel sheet having a plating amount of 25 / m 2 on one side using PALBOND 3050, Phosphoric Acid Phosphate Phosphate Treatment Agent of Parkerizing Co., And 2 were coated at a coating amount of 3 g / m ² to form a film, and then the film was held in an electric oven at 500 ° C. for 24 hours. The film was cut in an X- 3 mm or less, and X: peeling width exceeding 3 mm). The results are shown in Table 2 below.

[Table 2]

As shown in Table 2, although the state of the sealing material 61 was good in both of Production Examples 1 and 2, it was judged that the heat resistance of the sealing material 61 of Production Example 2 was more excellent.

The ball receiving portion 10 receives a ball 50 that is rotating. Referring to FIG. 2, the ball receiving portion 10 has a ball 50 therein. The ball receiving portion 10, when separated from the ball concealing portion 40, exposes a part of the ball. The ball rotates around the center of the ball in a circular motion. The ball is a solid consisting of all points at the same distance from one point.

The ball concealment portion 40 is rotated and fastened to the ball receiving portion 10. A part of the ball receiving portion 10 is inserted into the ball concealing portion 40 and then the ball concealing portion 40 and the ball receiving portion 40 are rotated as the ball concealing portion 40 rotates clockwise or counterclockwise 10) are combined.

Referring to FIG. 3, the ball receiving portion 10 includes a body portion 27; A ball support portion 21 disposed on one side of the body portion 27 and including a groove 23 into which a part of the ball is inserted; A first clearance hole 25 located on an outer wall of the ball supporting portion 21; (26) having one surface abutting the outer wall of the ball support portion (21) and the other surface abutting one surface of the body portion (27); A bolt portion 30 in which the ball 50 is accommodated and a first screw 33 is formed on an outer side; A void portion 31 formed in the ball receiving portion 37 to receive the ball 50; A ball receiving portion 37 on which the ball 50 accommodated in the hollow portion is seated; A second clearance hole 35 located on the outer wall of the bolt portion 30; When the ball supporting portion 21 is inserted into the bolt portion 30, the protrusion receiving portion 36 receives the protrusion 26; And a pawl 53 passing through the first through-hole 25 and the second through-hole when the ball support 21 is inserted into the bolt 30.

An object to be described later is coupled to the upper surface of the body portion 27. A detailed configuration of a ball receiving portion 10, which will be described later, is disposed on a lower surface of the body portion 27. [ The body portion 27 has a square pillar shape formed by a curved line rather than a portion connecting the one surface and the other surface.

The ball support portion 21 is disposed on one side of the body portion 27 and includes a groove 23 into which a part of the ball is inserted. The ball support portion 21 is disposed on one surface of the body portion 27, more specifically, on the lower surface. That is, the ball support portion 21 is disposed on the surface of the body portion 27 opposed to the surface to which an object to be described later is engaged. The ball supporting portion 21 includes a groove 23 formed at the center of the lower surface. That is, the ball supporting portion 21 is inserted into the bolt portion 30 to be described later in a hollow cylindrical shape. In detail, the ball supporting portion 21 fixes the ball 50 such that a part of the ball is rotated in a state where the ball is inserted into the groove 23.

The first through-hole (25) is located on the outer wall of the ball support (21). The first through hole 25 is a hole formed in the ball supporting portion 21. When the ball supporting portion 21 is inserted into the air gap portion 31 to be described later, the first through hole 25 is located at a position corresponding to the second through hole 35 formed in the bolt portion 30 to be described later .

One surface of the projection 26 is in contact with the outer wall of the ball support 21 and the other surface of the projection 26 is in contact with one surface of the body 27. When the ball supporting portion 21 is inserted into the cavity portion 31, the projection portion 26 can be received in the projection receiving portion 36 to be described later. The case where the ball supporting portion 21 is completely inserted into the cavity portion 31 means that the projection portion 26 is accommodated in the projection receiving portion 36. The state in which the protruding portion 26 is received in the protruding portion accommodating portion 36 is a state in which the protruding portion 26 is physically contacted or substantially abutted against the protruding portion accommodating portion 36. When the protruding portion 26 is received in the protruding portion accommodating portion 36, the first through-hole 25 and the second through-hole 35 are located at positions corresponding to each other. The fact that the first clearance hole 25 and the second clearance hole 35 are located at the corresponding positions means that the pawl 53 will pass through the second clearance hole 35 and the first clearance hole 25, It is possible to penetrate through the gap 31 and reach the void portion 31.

The bolt portion 30 is accommodated in the ball 50 and the first screw 33 is formed on the outer side. The bolt portion 30 is also a hollow cylindrical body. The first screw 33 is formed by cutting the groove 23 along the thread. The first screw 33 is configured to engage the bolt portion 30 with the nut portion 44 to be described later. The first screw 33 includes thread-like protrusions formed when the grooves 23 are broken along the threads and threaded threads which are the bottoms of the grooves 23 formed when the grooves 23 are dislocated along the threads.

The ball portion 31 is formed in the ball receiving portion 37 to receive the ball 50. The void portion 31 includes a space enough to accommodate the ball 50 with the above-mentioned hollow.

And a ball 50 received in the hollow portion is seated on the ball receiving portion 37. The ball injected from the upper portion of the bolt portion 30 does not flow down to the lower portion of the bolt portion 30 but only a part of the ball remains across the ball receiving portion 37. [

And the second through hole 35 is located on the outer wall of the bolt portion 30. [ In detail, a second through-hole 35 is formed at a position spaced apart from the upper end of the bolt portion 30.

The protrusion receiving portion 36 receives the protrusion 26 when the ball supporting portion 21 is inserted into the bolt portion 30. The protrusion receiving portion 36 is formed at the upper end of the bolt portion 30.

The pawl 53 passes through the first through-hole 25 and the second through-hole when the ball support 21 is inserted into the bolt 30.

In other words, as to the detailed configuration of the ball receiving portion 10, the ball inserted into the gap 31 is seated on the ball receiving portion 37 and only a part of the ball is exposed to the lower portion of the bolt 30. After the ball 50 is seated, the ball supporting portion 21 is inserted into the gap portion 31 until the projection portion 26 is engaged with the projection receiving portion 36, and the projection portion 26 is inserted into the projection receiving portion 36 The paired poles 53 having a predetermined length are inserted into the first through-hole and the second through-hole 35 located corresponding to each other. As the pawl 53 is inserted, the ball supporting portion 21 and the bolt portion 30 are firmly engaged and the ball is inserted into the groove 23 of the ball supporting portion 21, A part thereof is exposed to the outside of the bolt portion 30 in a state in which it is caught by the ball receiving portion 37. [

4, the ball concealment part 40 includes a nut part 44 having a second screw 46 formed therein and fastened to the bolt part 30; Extending portions (47, 49) extending from one surface of the nut portion (44) and having a second screw (46) formed therein; A first latching protrusion (48) protruding from an outer wall of the extension forming part (47, 49); A support portion 41 for receiving the extension forming portions 47 and 49 therein; (47, 49) is inserted into the support portion in a direction parallel to the direction in which the extension forming portions (47, 49) are inserted, when the extension forming portions (47, 49) A second latching jaw 43; .

The nut portion 44 has a second screw 46 formed therein and fastened to the bolt portion 30. The outer wall of the nut portion 44 is formed in a square pillar shape having a curved line without connecting the portion connecting the one surface and the other surface. When the nut portion 44 or the bolt portion 30 rotates clockwise or counterclockwise in a state where the lower portion of the bolt portion 30 is partially inserted into the upper portion of the nut portion 44, (44) and the bolt (30) are fastened or separated.

The extension forming portions 47 and 49 extend from one surface of the nut portion 44, and a second screw 46 is formed on the inner side. The second screw 46 is formed on the inside of the extension forming portions 47 and 49 and the inside of the nut portion 44. The second screw 46 is engaged with the first screw 33 formed on the outer side of the bolt portion 30 as the bolt portion 30 is inserted into the nut portion 44 and rotated.

The first stopping jaw 48 is formed protruding from the outer wall of the extending portions 47 and 49. In detail, the first latching jaw 48 includes a first parallel portion 57 formed at an upper portion thereof and extending in a direction parallel to the paper surface. The first latching jaw 48 includes a first inclined portion 56 inclined from the top to the bottom.

The support portion 41 accommodates the extension forming portions 47 and 49 therein. The outer wall of the support portion 41 is in the form of a quadrangular column formed by a curved line without a portion connecting the one surface and the other surface. The support portion 41 always contacts the ground when the ball 50 is not exposed to the outside. Accordingly, the support portion 41 needs to be made of a material that is not damaged by the friction of the ground or the like. Only the support portion 41 thinner than the nut portion 44 is realized with a different material having excellent strength so that the manufacturing cost of the support device 1 can be reduced.

The support portion 41 comprises a plastic composition. The plastic composition includes polypropylene resin, high density polyethylene resin (HDPE), talc and germanium powder. INDUSTRIAL APPLICABILITY The present invention can improve mechanical properties such as heat resistance and durability, can improve the twisting phenomenon, and can minimize toxicity to an operator who promotes metabolism and handles the manufactured support portion 41 by radiating far-infrared rays . Since the support portion 41 is positioned at the bottom of the support device 1, it is required to have high durability to protect the article to be mounted on the upper portion thereof, to have high heat resistance to withstand heat due to friction with the ground, And should not be harmful to workers working near the support device (1).

Polypropylene resin is a thermoplastic resin which is obtained by polymerization of propylene and is known as an environmentally friendly material which is inexpensive in performance and does not have a risk of being in contact with the contents of foods or cosmetics. The polypropylene resin is excellent in chemical resistance, mechanical properties , And excellent in thermal properties. The polypropylene may use at least one selected from a propylene homopolymer, a random copolymer and a block copolymer, but a homopolymer and a random copolymer are mixed in a weight ratio of 3: 2 to improve mechanical properties .

High-density polyethylene (HDPE) resin is a synthetic resin produced by polymerizing ethylene, and has excellent flowability, rigidity, impact resistance, electrical insulation, moldability, and cold resistance. The high-density polyethylene resin may be mixed with the above-mentioned polypropylene resin to improve the moldability by reinforcing the tensile force at the time of manufacturing the support portion 41 or the product, and a variety of known products may be used.

The talc improves the mechanical properties such as the strength and heat resistance of the plastic composition, and it is preferable to use a talc powder having a particle size of 150 to 200 mesh for mixing with polypropylene resin or the like. The talc may be used in admixture with other filler components, and may preferably be mixed with the dolomite powder at a weight ratio of 1: 1 to contribute to improvement of the durability of the plastic composition.

Germanium is a silvery white metal, which has the effect of promoting metabolism by emitting a large amount of far infrared rays and anions which are beneficial to the human body. Also, due to its semiconducting nature, germanium has a function of increasing the vitality of germanium ions (outer electrons) when they come into contact with the skin. When entering the body, it is released out of the body within 20 ~ 30 hours with various harmful substances, so there is no poisoning or side effects at all. Particularly, when the particles of inorganic germanium come into contact with human skin, semiconductor properties are introduced into the skin tissue by the osmotic action of the outer electron. It has been found that germanium, which penetrates into capillaries in subcutaneous tissues, moves electrons in the blood vessels through the blood vessel walls, performs blood purification, normalizes blood, and discharges excess electron flow to relieve pain. The germanium can be used in the form of powder. It is preferable that the germanium ore is finely cut to 3 cm or less and then the cut germanium ore is pulverized to a particle size of 80 to 100 mesh.

The plastic composition preferably contains 110 to 130 parts by weight of high-density polyethylene resin, 170 to 190 parts by weight of talc, and 1 to 10 parts by weight of germanium powder per 100 parts by weight of the polypropylene resin. When the support portion 41 is manufactured using the plastic composition, it is important to control the specific gravity of the plastic composition in order to eliminate the twisting phenomenon. The specific gravity is preferably 1.02 to 1.10, more preferably 1.03 to 1.05 . That is, when the content of the high-density polyethylene resin is less than 110 parts by weight or the talc is less than 170 parts by weight based on 100 parts by weight of the polypropylene resin, mechanical properties such as durability and the like are limited. Is more than 130 parts by weight or the talc is more than 190 parts by weight, there is a possibility that the specific gravity of the plastic composition is increased and the moldability may be deteriorated. If the amount of the germanium powder is less than 1 part by weight with respect to 100 parts by weight of the polypropylene resin, far infrared rays emission effect due to germanium is difficult to manifest. If the amount is more than 10 parts by weight, .

On the other hand, the plastic composition may further contain various additives in order to improve mechanical properties, mixing properties, moldability, antibacterial properties and the like.

In one embodiment, the plastic composition may further comprise a garlic extract. The garlic extract is a natural adhesive component and functions as a binder for improving the mixing property with other constituents such as a polypropylene resin and a high-density polyethylene resin. The garlic extract is peeled and crushed, and 2 to 3 parts by weight of water is added per 1 part by weight of garlic. After heating at 80 to 100 캜 for 5 hours or more, the liquid component is extracted and filtered, The liquid component can be prepared by concentrating at 55 to 60 占 폚. The garlic extract is preferably contained in an amount of 10 to 20 parts by weight based on 100 parts by weight of the polypropylene resin. When the content of the garlic extract is less than 10 parts by weight, the polypropylene resin and talc can not be properly entangled, so that the surface of the support portion 41 may not be uniformly formed. When the amount of the garlic extract is more than 20 parts by weight, There is a possibility that the dispersibility and the mixing property may be lowered.

At this time, a sucrose (C12H22O11) powder may be mixed and used to supplement the function of the garlic extract. The sucrose can be extruded in the form of a thin film during the stretching process for preparing the support portion 41 by improving the mixing property of the whole composition, and is capable of catching molecules that cause viscosity problems during mixing with the polypropylene resin, And it can contribute to solving the problem of bad odor. The sucrose is preferably a powder having a particle size of from 1 to 120 탆 in an amount of 95 wt% or more, which is filtered through a 120-mesh net, and is preferably contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the polypropylene resin. When the content of sucrose is less than 1 part by weight, the effect expressed by sucrose is insignificant. When the amount of the sucrose is more than 5 parts by weight, the viscosity of the plastic composition is excessively increased, and it is difficult to form a uniform sheet.

In one embodiment, the plastic composition may further comprise a clay powder. Kaolin is white clay based on kaolinite and halloysite, and has excellent resistance to abrasion and thermal shock. The clay is preferably contained in an amount of 5 to 10 parts by weight based on 100 parts by weight of the polypropylene. If the amount of the clay is less than 5 parts by weight, there is a problem that the resistance to the external environment is weak. If the amount is more than 10 parts by weight, a synergistic effect of mechanical properties such as a decrease in compressive strength may not be exhibited.

The plastic composition may further comprise titanium dioxide (TiO2). The titanium dioxide can serve as a filler capable of improving the heat resistance of the plastic composition. The titanium dioxide is preferably contained in an amount of 5 to 15 parts by weight based on 100 parts by weight of the polypropylene resin. If the amount of the titanium dioxide is less than 5 parts by weight, the abrasion resistance of the support portion 41 formed by the plastic composition can not be effectively improved. If the amount exceeds 15 parts by weight, workability may be deteriorated, This may not be good.

The plastic composition may further comprise aluminum hydroxide. Aluminum hydroxide functions as an antimicrobial agent capable of improving the antimicrobial properties of the plastic composition. It is preferable to use boehmite (AlOH (OH)) as the aluminum hydroxide. Boehmite can be any of γ-boehmite, α-boehmite and pseudo-boehmite. Of these, γ-boehmite excellent in crystallinity and excellent in thermal stability and chemical stability, structurally neutral, and excellent in antibacterial property is preferably used. The γ-boehmite can be prepared by supercritical synthesis of only water (pure water) and aluminum (Al). The aluminum hydroxide may be contained in an amount of 2 to 7 parts by weight based on 100 parts by weight of the polypropylene resin. If the content of aluminum hydroxide is less than 2 parts by weight, it is difficult to exhibit the antimicrobial effect to be achieved. If the content is more than 7 parts by weight, the compatibility with other components may be impaired.

The plastic composition may further contain a dispersant, an antifoaming agent or the like within the range not hindering the object of the present invention, and may further include a pigment component to realize various colors of the support portion 41 to be produced.

Hereinafter, the structure and effects of the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Example]

A plastic composition was prepared according to the composition shown in Table 1 below. Each material was made of commercially available material. In the case of garlic extract, it was prepared as described in the description of the invention, and the aluminum hydroxide used was gamma-boehmite.

[Table 1]

[Experimental Example 1]

The compositions of Examples 1 to 5 were heated and then stretched to prepare a plastic sheet having a thickness of 10 mm. The uniformity of the sheet surface was confirmed, and it is shown in Table 2 below. The uniformity was measured using a laser sensor (N ₂ laser, oscillation wavelength 337.1 nm, UDHO Laser., Japan), and 30 points were randomly selected to measure their surface roughness ㅁ 0.3 is less than 0.3, and more than 0.3 is not. Here, Examples 1 and 5 were subjected to a third elongation in the longitudinal direction, and Examples 2 to 4 were subjected to a third elongation in the longitudinal direction, the width direction and the longitudinal direction.

[Table 2]

As shown in Table 2, in the case of Examples 1 to 5, the uniformity of the produced sheet was all good. Among them, it was found that the uniformity of Example 3 was the most excellent.

[Experimental Example 2: Torsion Test]

The compositions of Examples 1 to 5 were heated and then stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 plastic articles. At this time, the finished product was evaluated for completeness, . Here, Examples 1 and 5 were subjected to a third elongation in the longitudinal direction, and Examples 2 to 4 were subjected to a third elongation in the longitudinal direction, the width direction and the longitudinal direction. 2 is a diagram showing a state in a good state, and Fig. 3 is a diagram showing a state in which it is in a bad state (twist phenomenon).

[Table 3]

As shown in Table 3, in Examples 2 to 4, more than 90% of normal products could be made. Particularly, in Example 3, the defective rate was very small.

[Experimental Example 3: Odor test]

An odor test was carried out for Examples 1 and 3 using ammonia gas. After the initial concentration measurement, the concentration after 5 minutes was measured and the deodorization rate was evaluated. The results are shown in Table 4 below.

[Table 4]

As shown in Table 4, it was found that Example 1 had little deodorizing effect, but Example 3 showed some deodorizing effect.

[Experimental Example 4: Antimicrobial Test]

The compositions of Examples 1 and 3 were tested for antibacterial activity (JIS Z 2801). Staphylococcus aureus ATCC 6538 (Staphylococcus aureus) and Escherichia coli ATCC 25922 (Escherichia coli) were used as the test strains, and the antibacterial activity (antibacterial activity value) was evaluated.

[Table 5]

The antimicrobial activity value refers to a value obtained by evaluating the degree of antimicrobial activity by comparing the number of strains cultured for a certain period of time. When the value is 1 or more, 90% or more of the strains are present, 2 or more are 99% , More than 99.99% of the strain is over 4, and more than 5 is more than 99.999% of the strain is killed. In the case of Example 3, it was confirmed that the antibacterial effect by γ-boehmite was exhibited.

When the extension portions 47 and 49 are inserted into the support portion beyond the reference distance, the second stopping protuberance 43 is inserted into the first stopping protrusion 48 so that the extension forming portions 47 and 49 are inserted In the direction parallel to the direction. The second latching jaw 43 includes a second parallel portion 55 formed at the lower portion thereof and extending in a direction parallel to the paper surface. The second latching jaw 43 includes a second inclined portion inclined from the lower portion to the upper portion. When the extension forming portions 47 and 49 are inserted into the support portion, the first inclined portion 56 and the second inclined portion 54 first come into contact with each other. When the extension portions 47 and 49 are further pushed in the inserted direction, the first latching jaw 48 rides over the second latching jaws 43 to move the first parallel portion 57 and the second parallel portion 55, Face each other. When the first parallel portion 57 and the second parallel portion 55 face each other, the support portion 41 is completely engaged with the extension forming portions 47 and 49. The support portion 41 is rotatable in a state of being coupled to the extension forming portions 47 and 49.

5 shows an object that can be engaged with the ball receiving portion 10 and the ball receiving portion 10. Fig. 6 shows a support device 1 and an object coupled with the support device 1. Fig.

The body portion 27 included in the ball receiving portion 10 is coupled to an object. Referring to FIG. 5, the object is a shelf support 60. In the upper edge of the ball receiving portion 10, coupling grooves 28 and 23 are formed which can be inserted and coupled with the shelf support 60. The coupling grooves 28 and 23 include a space of several millimeters into which the shelf support 60 can be inserted, and are formed in a '' shape. 5, when the object is inserted into the coupling grooves 28 and 23 formed in the body portion 27 along the one-dot chain line, the object and the supporting device are fully engaged as shown in FIG.

Figs. 7 (a) to 7 (c) show cut surfaces according to the degree to which the ball concealing portion 40 is coupled to the ball receiving portion 10. Fig. 8 is a front view of the support device 1 in a state where the ball receiving portion 10 and the ball conceal portion 40 are fully engaged. 9 is a perspective view of the supporting device 1 in a state in which the ball receiving portion 10 and the ball concealing portion 40 are fully engaged. 10 is a front view of the support device 1 in a state in which the ball 50 is covered by the ball concealment part 40. Fig. 11 is a front view of the support device 1 in a state in which the ball 50 is covered by the ball concealment part 40. Fig. 12 is a perspective view of the support device 1 in a state in which the ball 50 is covered by the ball concealment portion 40. Fig.

Figs. 7 (a), 8 (a) and 8 (b) show a supporting device in which a part of the ball received in the supporting device 1 in which a part of the ball received therein is developed is shown. The ball is exposed to the outside as the upper part of the ball concealing part 40 is completely in contact with the lower part of the ball receiving part 10. [ The ball received in the gap 31 of the bolt 30 is exposed to the outside via the ball seat 37, the nut 44, the elongated portions 47 and 49, and the support 41. At this time, the support device 1 can be moved by the rotational motion of the ball, and it is easy to move even when an object is mounted on the upper part.

Figs. 7 (b), (c) and 10 to 12 show a state in which a part of the ball exposed in Fig. 7 (a) is completely hidden by the ball concealing portion 40. Fig. In the embodiment according to Figs. 7 (b), (c), and 10 to 12, the support device 1 is floated on the ground as the entire ball is received into the support device 1. [

In other words, the user can grasp the support portion 41 with one hand, and the ball 50 can be exposed to the outside or concealed by rotating the ball concealing portion 40 inserted with the other hand. The method of determining whether or not the ball is exposed is not limited to the method described above. The method of grasping the holding portion 41 and the ball concealing portion 40 with one hand and grasping the body portion 27 with the other hand, (41) and the ball concealing portion (40) together.

Fig. 13 shows a process in which the extension forming portions 47 and 49 are inserted into the support portion. Fig. 14 shows a state in which the extension forming portions 47, 49 are inserted and fixed into the support portion.

Referring to FIG. 13, when the extending portions 47 and 49 are inserted into the support portion in the direction of the arrow, the first inclined portion 56 and the second inclined portion 54 first come into contact with each other. 14, the first latching jaw 48 rides over the second latching jaws 43 and moves to the first parallel portion 57 (Fig. 14) And the second parallel portion 55 face each other. When the first parallel portion 57 and the second parallel portion 55 face each other, the support portion 41 is completely engaged with the extension forming portions 47 and 49.

Fig. 15 shows a controller coupled to the support device 1. Fig. 16 is a block diagram of the controller. The support device (1) further includes a controller (17) disposed on one surface. The controller 17 is mounted on one side of the support device 1 and performs a function to be described later.

The controller 17 includes a speaker 192 located at one side and includes a message output unit 193 for driving the speaker 192.

The message output unit 193 outputs a guidance message after a predetermined time from the time when the supporting apparatus 1 has moved. The controller further includes an acceleration sensor 194, and when the support device 1 moves, the acceleration sensor 194 senses the acceleration and outputs a corresponding signal to the controller. The message output unit 193 recognizes the time when the supporting device 1 moves based on the signal. And outputs the guidance message through a speaker 192 provided on one side of the controller 17. [ The announcement message is, for example, "Time to relax." .

The message output unit 193 controls the speaker 192 such that the controller 192 outputs 50 dB of audible sound from the speaker 192 when the controller 17 exceeds 50 minutes from the time when the supporting device 1 moves.

The message output unit 193 controls the speaker 192 such that the speaker 192 outputs audible sound of 60 decibels at a point of time when the controller 17 exceeds 60 minutes from the time when the support apparatus 1 moves.

The message output unit 193 controls the speaker 192 so that 70 dB of audible sound is output from the speaker 192 when the controller 17 exceeds 70 minutes from the time when the supporting device 1 moves.

The message output unit 193 controls the speaker 192 so that the speaker 192 outputs audible sound of 80 decibels at a time point when the controller 17 exceeds 80 minutes from the time when the supporting device 1 moves.

The message output unit 193 drives the speaker 192 so that the controller 17 outputs a sound of a high decibel as the time from the time when the support apparatus 1 moves, It can be recognized. In the case where workers continuously convey objects through the support device 1, workers need to convey them while maintaining a high concentration of focus, and it is necessary to provide workers with periodic breaks for the concentration. In the past, only the structure of the support device (1) was concerned, but the workers did not worry about the work efficiency. In order to overcome these problems, it is necessary to transmit different sound information to the workers according to the working time.

The controller 17 further includes a heart rate receiver 195 for receiving a heart rate per minute from a heart rate sensor attached to a chest of a worker through a communication unit 191. The message output unit 193 outputs, And a sleeping warning sound is output.

The heart rate of the heart rate sensor worker is measured. The heart rate sensor measures the heart rate of the worker by non-invasive method. The heart rate sensor may be attached at a position where the heart rate of the operator can be measured.

The message output unit 193 outputs a drowsiness warning sound when the heart rate per minute is below a reference value. That is, the message output unit 193 determines that there is a high possibility that the worker sleeps or the worker is drowsy if the worker's heart rate per minute is less than the reference value. Accordingly, the message output unit 193 controls the speaker 192 to output a drowsy warning sound.

The message output unit 193 controls the speaker 192 to output an audible sound of 50 decibels when the worker's heart rate per minute is 50 times or more and less than 55 times.

The message output unit 193 controls the speaker 192 to output an audible sound of 60 decibels when the worker's heart rate per minute is 45 times or more and less than 50 times.

The message output unit 193 controls the speaker 192 to output an audible sound of 70 decibels when the worker's heart rate per minute is 40 times or more and less than 45 times.

The message output unit 193 controls the speaker 192 to output an audible sound of 80 decibels when the worker has a heart rate per minute of 33 or more and less than 40 times.

The message output unit 193 controls the speaker 192 to output an audible sound of 90 decibels when the worker's heart rate per minute is 31 times or more and less than 33 times.

The message output unit 193 outputs a sound of high decibel at a speaker 192 as the worker's heart rate is low, thereby allowing the operator to wake up from drowsiness, thereby preventing a safety accident in advance.

The message output unit 193 transmits an electric shock command to the automatic cardiopulter so that an automatic cardiopulmonitor attached to a part of the body of the worker applies electric shock to the heart when the heart rate per minute is not more than a reference value.

The automatic cardiopulmonary device may be attached at a position where electric shock may be applied near the heart of the operator. The electric shock is a small shock that the operator wakes up.

The message output unit 193 has been described above as being capable of determining that the operator is in the drowsy state when the heart rate per minute is equal to or lower than the reference value. In addition, the message output unit 193 may determine that there is a high possibility that a cardiac arrest in which the heart rate of the worker stops is generated when the heart rate per minute is less than the reference value. Accordingly, the message output unit 193 can transmit an electric shock command to the automatic cardiopulter so that the cardiac pacemaker attached to the seat belt can apply electric shock to the heart.

The message output unit 193 may transmit an electric shock command to the automatic cardiopulter so that the peak value of the output voltage of the automatic cardiopulmator is more than 1000V and less than 2000V when the worker's heart rate per minute is less than 50 times and less than 55 times.

The message output unit 193 can transmit an electric shock command to the automatic cardiopulter so that the peak value of the output voltage is less than 2000V and less than 3000V when the worker's heart rate per minute is 45 times or more and less than 50 times.

The message output unit 193 may transmit the electric shock command to the automatic cardiopulter so that the peak value of the output voltage is equal to or more than 3000 V and less than 4000 V when the worker's heart rate per minute is less than 40 times and less than 45 times.

The message output unit 193 can transmit an electric shock command to the automatic cardiopulter so that the peak value of the output voltage is 4500 V or more and less than 4700 V when the worker's heart rate per minute is 33 or more and less than 40 times.

The message output unit 193 can transmit an electric shock command to the automatic cardiopulter so that the peak value of the output voltage is less than 4700 V and less than 5000 V when the worker's heart rate per minute is 31 times or more and less than 33 times.

The message output unit 193 can transmit an electric shock command to the automatic cardiopulter so as to output a higher voltage as the worker's heart rate is smaller.

If a flammable gas flows into the inside of the workplace where the support device is located and a flammable gas also flows into the controller 17, a small spark generated by the drive of the controller 17 may cause a large fire. An object to be explosion-proof is placed inside the controller (17). The explosion-proof object can be placed in the state of being exposed to the inside space of the controller 17 or can be stored independently in the controller 17. When the object to be explosion-proof is independently embedded in the controller 17, it is safely stored from an ignition source such as a fire or a combustible gas, and the inflow of the ignition material is completely blocked by the controller 17, Can be stored.

The controller 17 includes a solenoid valve for introducing compressed gas into the controller 17; A relief valve for discharging fluid inside the controller (17); An explosion-proof temperature sensor disposed on the inner wall of the controller (17); A cooler disposed on an inner wall of the controller (17); A heater disposed on the inner wall of the controller (17); The controller 17 includes a heater driver for driving the heater when the temperature received from the explosion-proof temperature sensor 901 is -30 degrees or less; And a cooler driving unit for driving the cooler when the temperature received from the explosion-proof temperature sensor 901 is 50 degrees or more. The controller 17 may also control to open or close the relief valve and the solenoid valve.

The solenoid valve 950 introduces the compressed gas into the controller 17. And the compressed gas is supplied into the controller 17 through the solenoid valve 950. That is, when the solenoid valve 950 is opened, the compressed gas flows into the controller 17, and when the solenoid valve 950 is closed, the compressed gas can not flow into the controller 17.

The relief valve 960 allows the fluid in the controller 17 to flow out. The relief valve 960 discharges the fluid inside the controller 17 to the outside of the controller 17 or cuts off the discharge. That is, when the relief valve 960 is opened, the fluid inside the controller 17 is discharged to the outside of the controller 17. Further, when the relief valve 960 is closed, the discharge of the fluid existing in the controller 17 is cut off.

The explosion-proof type temperature sensor is disposed on the inner wall of the controller (17). Specifically, the explosion-proof type temperature sensor is disposed on the inner upper surface, the left surface, the right surface, and the lower surface of the controller 17.

The cooler 930 is disposed on the inner wall of the controller 17. The cooler 930 is an air cooler (Vortex cooler) and disposed on the upper surface of the controller 17.

The heater 940 is disposed on the inner wall of the controller 17. The heater 940 is capable of outputting heat through a joule generated by flowing a current through a resistance wire or the like. The heater 940 is disposed on the lower surface of the controller 17.

The heater driving unit and the cooler driving unit may be function blocks implemented by a microcontroller or a micro processor included in the controller 17 although they are not shown in FIG.

The heater driving unit drives the heater 940 when the temperature received from the explosion-proof temperature sensor 901 is -30 degrees or less. The explosion-proof warming sensor transmits the temperature measured in real time to the controller 17, and the heater driving unit drives the heater 940 when the internal temperature of the controller 17 is less than -30 degrees. If the internal temperature of the controller 17 is less than -30 degrees, at least a part of the configuration of the controller 17 may malfunction.

More specifically, the heater driving unit drives the heater 940 when the temperature received from at least one of the explosion-proof temperature sensors 901 disposed on the upper, left, right, and lower surfaces of the controller 17 is -30 degrees or less, .

The cooler driving unit drives the cooler 930 when the temperature received from the explosion-proof temperature sensor 901 is 50 degrees or more. If the internal temperature of the controller 17 is 50 degrees or more, at least a part of the configuration of the controller 17 may malfunction.

More specifically, the cooler driving unit controls the cooler 930 when the temperature received from at least one of the explosion-proof temperature sensors 901 disposed on the upper, left, right, and lower surfaces of the controller 17 is 50 degrees or more .

The cooler 930 and the heater 940 can maintain the internal temperature of the controller 17 within a range of -30 degrees to 50 degrees.

The relief valve 960 is formed on an upper portion or a lower portion of any one of the six sidewalls and the solenoid valve 950 is formed on the upper surface of the relief valve 960 The relief valve 960 is formed at the lower part of the surface facing the one surface and when the relief valve 960 is formed at the lower surface of the one surface,

That is, when the solenoid valve 950 is disposed at the upper right side of the inside of the controller 17, the relief valve 960 is disposed at the lower left inside surface of the controller 17. The compressed gas flows through the solenoid valve 950 and the fluid in the controller 17 is discharged through the relief valve 960. When the flammable gas heavier than the compressed gas flows into the controller 17, the flammable gas flows into the controller 17 through the solenoid valve 950 in the upper right side of the controller 17, And can be discharged through the lower relief valve 960.

Further, when the solenoid valve 950 is disposed below the right side of the inside of the controller 17, the relief valve 960 is disposed at the upper left side of the inside of the controller 17. The compressed gas flows through the solenoid valve 950 and the fluid in the controller 17 is discharged through the relief valve 960. When the flammable gas which is lighter than the compressed gas flows into the controller 17, the flammable gas flows into the inside of the controller 17 from the left side of the controller 17 due to the compressed gas flowing through the solenoid valve 950, And can be discharged through the relief valve 960 at the top.

The present invention is not limited to the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

1: Supporting device
10: Ball receiving portion
21: ball support
23: Home
25: First clearance hole
26:
27:
28: Coupling groove
30: Bolt portion
31:
33: first screw
35: 2nd clearance hole
36:
37: ball rest part
40:
41:
42: inside of support portion
43: second stop jaw
44: Nut portion
46: Second screw
47, 49: extension forming part
48: First stopping jaw
50: Ball
53: Paul
54: second inclined portion
55: second parallel portion
56: first inclined portion
57: first parallel portion
60: Shelf support
61: Seal material
62:
191:
192: Speaker
193: Message output section
194: Accelerometer
195: heart rate receiver per minute

Claims (2)

A ball receiving portion for receiving a ball for rotational movement; And
And a ball concealing part which is rotated and engaged with the ball receiving part,
The ball receiving portion
A body portion;
A ball supporting portion disposed on one surface of the body portion and including a groove into which a part of the ball is inserted;
A first clearance hole located on an outer wall of the ball supporting portion;
A protrusion having one surface abutted against the outer wall of the ball support portion and the other surface abutting against the one surface of the body portion;
A bolt portion in which the ball is accommodated and a first screw is formed on an outer side;
A ball receiving portion on which the ball is seated;
A ball portion formed in the ball receiving portion and receiving the ball;
A second clearance hole located on an outer wall of the bolt portion;
A protrusion receiving portion for receiving the protrusion when the ball supporting portion is inserted into the bolt portion; And
And a pole penetrating the first through-hole and the second through-hole when the ball supporting portion is inserted into the bolt portion.
The method according to claim 1,
The ball concealment portion
A nut portion having a second screw formed inside thereof and fastened to the bolt portion;
An extension forming portion extending from one surface of the nut portion and having a second screw formed therein;
A first latching protrusion protruding from the outer side wall of the extension forming part;
A support portion for receiving the extension forming portion therein; And
And a second latching jaw that pushes the first latching jaw in a direction parallel to the inserted direction of the extending portion when the extending portion is inserted into the support portion beyond a reference distance. / RTI >
Supporting device.

Images