KR101342983B1 - Boundary device with filling block for separating sidewalk from road - Google Patents

Abstract

A road boundary device having a filling block according to the present invention includes a road portion standing up on a road side, a delivery portion standing up on a side of a delivery side, a connecting portion connecting the top portion of the road portion and a delivery portion, and the road portion as a lower space of the connecting portion. A main body including a space provided between the lead portion and the guide portion; A bent portion that is vertically bent in the road direction and the delivery direction at the lower end of the road portion and the delivery portion of the main body and embedded in the ground; Filling block is made of any one of a rubber material, a metal material, a stone material, a concrete material filled in the space; consisting of, the main body, the base layer made of steel; It is laminated to the outside of the base layer, characterized in that consisting of; an outer reinforcing layer made of any one of rubber and elastic plastic.
According to the invention

Description

Road boundary device with filling block {BOUNDARY DEVICE WITH FILLING BLOCK FOR SEPARATING SIDEWALK FROM ROAD}

The present invention relates to a road boundary device having a filling block, and more specifically, to a base block made of steel and an outer reinforcement layer made of a new plastic or rubber material laminated on the outside of the base layer, and simultaneously filled with a space provided therein. It relates to a road boundary device that distinguishes between a road and a sidewalk that are easy to construct by filling the stiffener and have reinforced shock absorbing / opposing functions.

For the safety of sidewalks, there are boundary areas between roads and sidewalks, and such boundary areas are widely used to provide sidewalks higher than the height of the roadway, or at the same time or provide a boundary device between the sidewalks and the sidewalks.

The boundary device in the field of road facilities is to distinguish the road and the boundary between sidewalks, to protect the independent space of the sidewalk, and to provide the ability for the driver on the road to identify the roadside area. There are such things as guardrails, separators and road facility protection devices.

Until now, boundary stones made of stone have been widely used as a boundary device for separating roads and sidewalks. These boundary stones are formed so that the boundary between the roads and sidewalks has a high difference, that is, the sidewalks are higher than the roads. It is often composed of a columnar structure or a block shape of a cuboid on sidewalks and road parts.

However, these boundary stones are fragile, expensive, and heavy due to external shocks, and require substantial manpower or equipment when they are mounted, and they are difficult to recycle due to the nature of the stone.

 Therefore, various efforts have been made to replace the stone, and one of them was to form a boundary device using waste rubber.

For example, Korean Utility Model No. 87062 'Road Boundary using waste tires' stacks a plurality of waste tires to a certain height and guarantees vertical and horizontal bearing capacity with 'ㅗ' -shaped reinforcing bars, The planting is designed to enjoy the landscaping effect, the tires attached to the adhesive can be easily separated from each other by the impact, not only aesthetically beautiful but also takes up a lot of space.

In addition, Korean Patent Publication No. 10-1999-0081709 'Road boundary device' is formed by heating and pressurizing the crushed waste rubber to form a plurality of connections to use the waste rubber can be recycled and maintain the connection easily to maintain stability In order to improve and easily distribute the reflector on the surface, to form a columnar body consisting of crushed waste rubber, including a connecting means for connecting each body to the side circumferential surface or the upper surface of the external impact It is said to provide the characteristics of excellent absorption and no breakage.

However, since the above technology has a structure in which a metal connecting means is connected to the upper portion of the body made of a modular type, each body is made independently so that the connection means is easily vulnerable to breakage when an actual external impact is applied. The problem of high damage is pointed out.

In order to prevent such a problem, the applicant has secured a patent for 'boundary device that separates roads and sidewalks.' Waste and tires can be utilized while ensuring elasticity and durability while providing environmentally friendly features.

Although it is evaluated as having excellent shock absorption function due to the elasticity of the rubber itself, which is recognized as a characteristic of this technology, the basic structure is made of rubber, so that the outer shape may be deformed by heat even if reinforcing bars are inserted therein. Although the space provides a shock absorbing function, if the volume is large, the durability of the entire boundary device may be deteriorated.

Therefore, a new and advanced boundary device that uses rubber as a member instead of a base material and recycles steel as a base material, but reinforces the problem of deterioration of durability due to the hollow part generated inside the base material and the function of promoting shock absorption. The need for this is emerging.

The present invention has been made in order to overcome the problems of the above technology, the base material is composed of a recyclable iron material and the rubber is laminated to the base material as a member, but the overall shape is formed as rotated 90 degrees counterclockwise c-shaped, It is a main object of the present invention to provide a road boundary device that provides a shock absorbing function through the resulting space but ensures durability by filling a filling block that compensates for weak durability in the space.

Another object of the present invention is to provide a support in the space so as to prevent the space from being easily distorted.

Another object of the present invention is to provide a filling block made of different materials to fill the upper and lower spaces of the space, respectively, to compensate for the different properties of the upper and lower sides of the boundary device.

It is a further object of the present invention to further form an elastic separation part in the support part so as to efficiently disperse them on the support part when the lamella absorber blocks are formed in plural.

In order to achieve the above object, the road boundary device with a filling block according to the present invention, the road portion standing up on the road side, the delivery portion standing up on the side of the side, the connecting portion connecting the upper end of the road portion and the delivery portion, A main body including a space provided between the road part and the delivery part as a lower space of a connection part; A bent portion that is vertically bent in the road direction and the delivery direction at the lower end of the road portion and the delivery portion of the main body and embedded in the ground; Filling block is made of any one of a rubber material, a metal material, a stone material, a concrete material filled in the space; consisting of, the main body, the base layer made of steel; It is laminated to the outside of the base layer, characterized in that consisting of; an outer reinforcing layer made of any one of rubber and elastic plastic.

The main body may further include a support part connecting the road part and the guiding part as a plurality of pieces at regular intervals along the length direction of the road part and the guiding part at a point in the space spaced from the connecting part. .

In addition, a filling block made of concrete material is filled in the upper space of the space partitioned by the support, and a filling block made of rubber material is filled in the lower space of the space.

In addition, the upper space of the space partitioned by the support is formed by seating the stone on the support and then put the concrete curing composition on the stone, the volume ratio of the stone and the concrete curing composition is made of 1:05 to 1. The filling block is filled, characterized in that the filling block made of a rubber material is filled in the lower space of the space.

In addition, the support portion, a plurality of holes spaced in a predetermined depth on the upper surface at regular intervals, a support panel formed on the bottom surface of the hole, a spring standing up to a predetermined height from the support panel to provide a compressive force, the top of the spring It characterized in that it further comprises; an elastic separation portion made of a cover formed in.

According to the road boundary device with a filling block according to the present invention,

1) Recyclable steel and rubber are laminated and combined into a base material and member, and the U-shape is rotated 90 degrees counterclockwise as a whole to form a filling block in the space while giving shock absorbing function by the space and members. Durability and flexibility of the space inside the space can be ensured,

2) add support in the space to ensure durability;

3) Fill the filling block made of concrete material in the upper space among the two spaces partitioned by the supporting part to ensure the rigidity of the upper side of the boundary device, while filling the rubber material in the space below the space to reinforce the shock absorbing function of the boundary device. The overall effect is to balance durability and shock absorption.

1 is a perspective view showing a schematic structure of a road boundary device according to the present invention.
Figure 2 is a longitudinal sectional view showing a schematic structure of the road boundary device according to the present invention.
Figure 3 is a longitudinal sectional view showing an embodiment in which the support is further installed in the space according to the present invention.
Figure 4 is a longitudinal cross-sectional view showing a state in which the filling block is filled with different materials at the boundary of the support portion according to the present invention.
5 is a cross-sectional view illustrating a state in which an elastic separation unit is additionally installed in a support unit supporting the filling block.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale and wherein like reference numerals in the various drawings refer to like elements.

1 is a perspective view illustrating a schematic structure of a road boundary device according to the present invention, and FIG. 2 is a longitudinal cross-sectional view illustrating a schematic structure of a road boundary device according to the present invention.

As can be seen from FIG. 1, the road boundary device 10 according to the present invention is installed between a road and a sidewalk to provide a function of boundary between the road and the sidewalk, and is basically a road part 20 and a delivery part 30. ), The connecting portion 40, and the main body 15 including the space 50 and the bent portion 70 and the filling block 100 is filled in the space 50.

The main body 15 of the present invention is exposed to the ground to provide a main function of distinguishing the road and the sidewalk, including the lower portion of the main body 15, the bent portion 70 is embedded in the ground to the main body 15 Provide support.

First, the road part 20 of the main body 15 means a structure standing up in the road direction (road side part), and the delivery part 30 means a structure standing up in the delivery direction (indian side part), and the connection part ( 40 performs the function of connecting the upper portion of the road portion 20 and the delivery portion 30, and the space 50 is a hollow portion provided in the lower portion of the connecting portion 40, that is, between the road portion 20 and the connecting portion 30 It means space.

The road part 20, the delivery part 30, and the connection part 40 have a thickness (width) of approximately 30 to 70 cm so as to have an appropriate volume that can sufficiently cope with external impact.

As can be seen from the termination structure shown in Fig. 1, the boundary device 10 according to the present invention has a "∏" shape.

Specifically, the upper surface of the connecting portion 40 is formed in a flat state (that is, a state having a flat surface), but the lower surface of the connecting portion 40 may be rounded, and the connecting portion 40 and the road part are also rounded. Corner connecting portion of the 20 can also be rounded to curvature by cutting the angle, which is to ensure durability by the impact dispersion effect than the linear connection state by the rounding treatment configuration, in particular the road side of the road part 20 The rounding of the upper part is intended to provide the flexibility of the corner part to correspond appropriately because the impact amount is relatively greater on the road side than the side of the side. The rounding process may be selected or used as a rounding treatment method of the base layer 16 itself to be described later or a rounding treatment method of the outer reinforcing layer 17.

In addition, a space 50 is formed between the lower portion of the connection portion 40, that is, the road portion 20 and the connection portion 30, and the space 50 provides a function capable of absorbing and dispersing external impacts. For example, if this part is completely enclosed with recycled resin, it can be absorbed as it is without dispersing the impact, thereby recognizing that there is a problem that the fatigue of the device may be increased. will be.

The main body 15 formed of the road part 20, the delivery part 30, the connection part 40, the space 50, and the support part 60 is laminated to two different materials.

That is, the road boundary device 10 according to the present invention, unlike the existing boundary device usually made of stone is composed of the base layer 16 (base material) made of steel, and any one of rubber and elastic plastic outside the base layer 16 The outer reinforcing layer 17 (member) made of a material is laminated and bonded.

Unlike stone, steel is environmentally friendly because it is easy to recycle and can be easily combined with and separated from the outer reinforcing layer 17 made of rubber or elastic plastic by heat treatment or other releasing method of various adhesive methods, thereby making the outer reinforcing layer 17 It has the property of having both elasticity and ductility of steel itself.

In other words, the outer reinforcing layer 17 may have elasticity to elastically absorb external impacts, but the base layer 16 serving as a base material of the road boundary device 10 according to the present invention in order to prevent a problem of inferior durability. It is to be made of steel to ensure the overall rigidity and durability of the road boundary device 10 of the present invention.

The thickness of the base layer 16 and the outer reinforcing layer 17 is preferably in a ratio of 1: 0.5 to 0.8, and it is preferable to reinforce elasticity while providing durability.

Filling block 100 accommodated in the space 50 has a volume smaller than the volume in the space 50 and more preferably consists of a plurality of units (units), the filling block 100 is a rubber material (closed Tire material), metal material, stone material, concrete material (waste-moncrete material), made of any one of the rubber material provides a shock-absorbing function, and when made of a hard material such as a metal material, not a rubber material with elasticity

 The external reinforcing layer 17 may absorb the shock provided from the road side, but when the space 50 has a volume more than necessary, the durability of the main body 15 is reduced due to the nature of the ductile steel, thereby providing a shock absorbing function. Since the inherent advantages of the space can be offset, the auxiliary impact countermeasure, ie the filling block 100, is filled while ensuring the extra space in the space 50 is constant and integrated into the inner surface of the main body 15. Rather than attaching to the space 50, the inner space of the space 50 is not occupied, i.e., the space 50 is filled in a state in which an extra space is guaranteed, thereby providing convenience of installation, and of course, the filling block 100 is somewhat spaced in the space. It is to flow in the to provide a shock absorbing function by the self-collision (applied in the case of a plurality of filling blocks) between the filling block 100 will be.

The filling block 100 may be filled in the space 50 by being formed as a unit having a predetermined length extending along the longitudinal direction of the main body 15, or as shown in FIG. It may be filled in the space 50 while being divided into about a unit.

In summary, the filling block 100 is to assist the shock absorbing function by the space 50, and does not attach to the inner surface of the main body 15 integrally to guarantee a certain degree of free fluidity, so that the impact of the filling block 100 may be reduced. In addition to providing the absorption effect, it also provides the ability to recycle waste such as waste concrete or waste rubber.

In addition, as can be seen from Figure 1, the surface of the outer reinforcing layer 17, it is possible to further form the display unit 18 is printed any one of the region name or other names, signs, letters, symbols, pictures.

That is, according to the road boundary device 10 of the present invention, it is possible to print characters, pictures in a more convenient manner on the outer reinforcing layer 18 made of rubber or elastic plastic as compared to the existing stone boundary device.

The bent part 70 formed at the lower part of the main body 15 is a vertically bent configuration in the direction of the road part 20 and the lower end of the delivery part 30 toward the delivery and the road side, respectively, and is buried in the ground made of ascon or concrete, etc. Becomes

Specifically, the entirety of the bent portion 70 or the lower portion of the road portion 20 and the guiding portion 30 and the entire bent portion 70 are embedded in the ground so that the main body 15 acts in the vertical direction by an external force. It provides a role of fixing firmly to the ground so that it does not easily escape from the ground.

Figure 3 is a longitudinal cross-sectional view showing an embodiment in which the support is further installed in the space according to the present invention.

The support part 60 spaced in parallel with the connecting part 40 and connecting the road part 20 and the guiding part 30 in the space 50 has a predetermined interval (about 40 to 60 cm along the longitudinal direction of the boundary device of the present invention). Space | interval), bar type is formed in multiple numbers, or it extends horizontally in a panel type.

The support part 60 provides a space in which the space 50 absorbs the impact due to an external impact, and the filling block 100 is filled therein. However, the support part 60 is easily crushed or deformed due to the hollow structure. In order to prevent this from happening, that is, the road part 20 and the delivery part 30 are connected to each other separately from the connection part 40 so that the appearance of the road part 20 may be damaged from an external impact, or the main body 15 itself may be damaged. It provides a function to prevent shape deformation from occurring.

The filling block 100 described above by the support 60 may be distributed in the upper and lower portions of the space 50 or the upper space of the support 60 with respect to the support 60, for example, the support 60. Is provided at a point below the approximately intermediate height of the space 50, and it is possible to mount the shock absorbing block 100 having a volume smaller than the space 50 thereon.

Here, the support 60 is preferably formed at the lower side of the entire height of the space 50, which ensures the volume of the filling block 100 to be filled in the space 50 and at the same time in the space 50 This is to prevent the phenomenon in which the filling block 100 is inclined in one of the right and left directions to balance the shock absorption in the space 50.

Furthermore, the filling block 100 may be filled in upper and lower portions of the space 50 generated based on the support 60, thereby allowing the filling block 100 to be evenly distributed in the space 50. It is also possible to express a stable impact resistance function in the space 50.

In addition, as shown in Figure 3, it is also possible to fill the filling block 100 of different sizes in the upper and lower space of the space 50 generated based on the support 60, even if the same material According to the volume of the (100) can be used to use a variety of tension, compressibility, flexibility can be used, in particular in order to enhance the durability of the space upper space vulnerable to impact in the upper space of the space 50, the filling block 100 having a large size ) And the filling block 100 having a smaller size may be filled in the lower space of the space 50.

Figure 4 is a longitudinal cross-sectional view showing a state in which the filling block according to the present invention is filled with different materials at the boundary of the support.

 As can be seen from Figure 4, the filling block 100 is made of a heterogeneous, specifically, the upper portion of the space 50 generated on the basis of the support portion 60 is filled with a concrete material, the lower portion of the rubber space 50 Can be filled with ash.

At this time, the support 60 is formed in the form of a panel (panel) rather than a bar (bar) so that unnecessary gaps do not occur in the support itself, so as to completely separate the space 50 up and down space as possible.

In other words, the space 50 is divided into upper and lower spaces by the support part 60, and the concrete material in which water, cement, sand, and gravel are mixed in the upper space of the space 50 (the ratios of these are currently known levels. In accordance with)) may be cured to form the filling block 100 or by pulverizing the waste concrete to a certain size to fill.

That is, the concrete-based filling block 100 is to ensure the durability of the upper portion of the space 50 by using the excellent compressibility inherent in the concrete, when the impact device is applied to the boundary device 10 of the present invention boundary device The lower side of the buried in the ground has a strong impact resistance function, but the upper side of the boundary device 10 is relatively weak to impact than the lower side, there is a problem that can be broken or easily crushed, to prevent this space (50) In order to ensure the rigidity of the upper side of, i.e., the upper side of the boundary device 50, it is possible to prevent being easily crushed or damaged by external impact.

In addition, the filling block 100 filled in the upper space of the space 50 seats the stone 120 on the support 60, and then the volume ratio of cement: aggregate (ie, sand or gravel): water thereon is approximately 1 It is also possible to form by filling the concrete curing composition 130 consisting of: 3: 6. At this time, the volume ratio of the stone 120 and the concrete curing composition 130 may be made of 1: 0.5 to 1.

In other words, if all of the filling block 100 filled in the upper space of the space to form a concrete curing composition may cause the burden and cost increase according to the curing, first the stone 120 on the support 60 This is because it is more efficient and signage to pour the concrete curing composition 130 on it.

Furthermore, as can be seen from Figure 4, the filling block made of stone and concrete curing composition can be filled in the pack.

The pack 150 is made of an elastic material or other materials that are not easily torn, and has an opening 155 on one side, and the concrete material adheres to the inner wall of the support 60 or the boundary device 10 by curing the concrete. When replacing boundary devices, the tool reduces the hassle of breaking them with tools. That is, by filling the mixture of the concrete or stone 120 and the concrete curing composition 130 in the pack 150, the pack 150 itself can be easily separated from the configuration of the support unit 60, etc. at the time of later replacement or collection. It can be provided for the convenience of replacement and repair.

The lower side of the support part 60, that is, the lower space of the space 50 is filled with a rubber material 140, the rubber material 140 is preferably in contact with the lower surface of the support portion 60 in the upper space It is to reinforce the shock absorbing function of the lower part of the space by the elastic force unique to the rubber while dispersing the phenomenon in which fatigue is accumulated in the support part 60 by the weight of the filled filling block 100.

By the heterogeneous configuration of the filling block 100, the rigidity of the upper side of the boundary device and the shock absorbing function of the lower side of the boundary device of the present invention are reinforced to provide a property of providing a boundary device with better performance.

5 is a cross-sectional view illustrating a state in which an elastic separation unit is additionally installed in a support unit supporting the filling block.

The elastic separation unit 110 is installed on the upper surface of the support unit 60, and particularly when the filling block 100 is a small number of seats on the support unit 60 provides a particularly useful function. At this time, the filling block 100 may be used both the above-described concrete or rubber material.

That is, the elastic separation unit 110 is composed of a support panel 111, a cover 113 and a spring 112, the shape similar to the shape of the bottom surface of the cover 113 on the upper surface of the support portion 60 for this configuration It characterized in that a plurality of holes are provided with a predetermined depth spaced apart a predetermined interval.

The support panel 111 is provided to support the spring 112 and the cover 113 and is similar to a general thin panel form and is formed on the bottom surface of the hole.

The spring 112 is formed to stand up to a certain height from the support panel 111 to provide a compressive force, and the cover 113 is connected to the hemispherical cover 113 at an upper end thereof so that the cover 113 is moved into and out of the support part 60. It gives elasticity to move.

In particular, the cover 113 may be formed in a hemispherical shape, but one side may have a more curved shape in order to more easily seat the filling block 100.

That is, the cover 113 can be divided into two curved surfaces based on the uppermost portion, that is, the tip 113a, and are called first and second rounding portions 113b and 113c, respectively.

The curved surface of the first rounding portion 113b extends convexly upward from the tip downward, and the curved surface of the second rounding portion 113c extends concave downwardly, ie downwardly convex downward from the tip, The extension length of the rounding portion 113c is formed longer than the extension length of the first rounding portion 113b.

That is, when viewed in the longitudinal section, one side (the first rounding part) is steep and the other side (the second rounding part) is a semicircular shape having a gentle inclination, so that the cover 113 is symmetric with each other (the side having a gentle inclination). If a plurality of them are formed to face each other, the plurality of filling blocks 100 seated on the support 60 may be held in a plurality than in the case of a hemispherical shape. Not only can be securely seated, there is an effect that can achieve a stable arrangement (seating) state while securing a certain space at a predetermined position without being too dense or one side spaced interval of each seated filling block (100). .

The elastic separation unit 110 is formed in each of the plurality of holes formed spaced apart from the support unit 60 by a predetermined interval, is configured to move elastically by the pressure applied to the cover 113 is filled in the upper portion of the cover 113 When the block 100 is seated and a predetermined pressure is applied, the block 100 is drawn into the support 60, and if no force is applied, the block 100 is drawn out of the support 60 according to various shapes and volumes of the filling block 100. Bars to be spaced apart from each other, that is, serves to easily arrange the filling block 100 on the support (60).

That is, the filling block 100 can freely partition the space due to the pressure applied by being seated on the support 60, and prevents the filling block 100 from being concentrated inside the space 50. The construction is more convenient than installing an alternative configuration such as a vertical separation plate between the filling blocks 100 forcibly, and can be used regardless of the diameter and volume of the filling block 100, which is very simple and easy to use. .

Furthermore, the elastic separator 110 has heat in the space 50 so as to prevent the problem of deforming the shape of the filling block 100 made of a rubber material due to overheating of heat in the space 50 during a hot summer. The filling blocks 100 may be placed in contact with each other even before there is an impact, while at the same time providing a property of preventing the problem of lowering the shock absorbing function.

In addition, when the concrete block is put on the support as in the embodiment according to FIG. 4 described above, the fluidity and mobility (the fluidity due to elasticity) of the filling block is significantly lower than that of the rubber material. By providing fluidity to the block of concrete material during external impact, it can also assist the shock absorbing function by providing a property that can give a certain level of properties such as rubber material flows by elasticity.

In addition, the elastic separation unit 110 is not limited to being made of only one stage as shown in the figure, it is also possible to have a plurality of stages (layers) in two stages and the like with a height difference.

As described so far, the configuration and operation of the road boundary device with the filling block according to the present invention have been expressed in the above description and the drawings, but this is merely an example, and the spirit of the present invention is not limited to the above description and the drawings. And, of course, various changes and modifications are possible within the scope without departing from the spirit of the present invention.

10: Road boundary device (boundary device)
15: main body 16: base layer
17: outer reinforcing layer 18: display portion
20: road part 30: delivery part
40: connection part 50: space
60: support part 70: bend part
90: bend 100: filling block
110: elastic separation portion 111: support panel
112: spring 113: cover
113a: peak 113b: first rounding part
113c: second rounding part 120: stone
130: concrete curing composition 140: rubber material
150: pack

Claims (6)

Road boundary device with filling block,
A main body including a road portion standing up on a road side, a delivery portion standing up on a side of the delivery side, a connecting portion connecting the upper end of the road portion and the delivery portion, and a space provided between the road portion and the delivery portion as a lower space of the connecting portion;
A bent portion that is vertically bent in the road direction and the delivery direction at the lower end of the road portion and the delivery portion of the main body and embedded in the ground;
Consists of any one of a rubber material, a metal material, a stone material, a concrete material filled in the space filling;
The main body includes:
A base layer made of iron;
The laminate is coupled to the outside of the base layer, characterized in that consisting of an outer reinforcing layer made of any one of rubber and elastic plastic; road boundary device. The method of claim 1,
The main body includes:
And a support part connecting the road part and the delivery part as a plurality at a predetermined distance along a longitudinal direction of the road part and the delivery part at a point in the space spaced from the connection part. 3. The method of claim 2,
The upper space of the space partitioned by the support portion is filled with a filling block made of concrete material, characterized in that the lower space of the space is filled with a filling block made of rubber material, road boundary device. 3. The method of claim 2,
The upper space of the space partitioned by the support is formed by seating the stone on the support and then put the concrete curing composition on the stone, the volume ratio of the stone and the concrete curing composition is 1:05 to 1 filled block It is filled, characterized in that the lower space of the space is filled with a filling block made of a rubber material, road boundary device. 5. The method of claim 4,
The pack of elastic material having an opening on one side on the support portion; is further seated,
Filling block consisting of the stone and the concrete curing composition, characterized in that the filling through the opening inside the pack, the road boundary device. 3. The method of claim 2,
The support portion
A plurality of holes formed at a predetermined depth in the upper surface at regular intervals,
A support panel formed on the bottom surface of the hole,
A spring standing up to a predetermined height from the support panel to provide a compressive force,
And an elastic separation part formed of a cover formed at an upper end of the spring.

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