KR102065458B1 - Interior construction method - Google Patents

Abstract

The present invention relates to an interior construction method which is implemented to perform interior construction by using movable scaffolding for interior work, wherein the movable scaffolding can be moved after a worker boards or an object is loaded on the scaffolding during the interior work. The interior construction method comprises: a prop preparation step of preparing a prop for interior design; an installation position selection step of selecting an installation position in accordance with an installation purpose of the prop; a scaffolding installation step of installing the movable scaffolding for interior work in the installation position of the prop; and a prop construction step of constructing the prop by using the movable scaffolding for interior work.

Description

Interior construction method {INTERIOR CONSTRUCTION METHOD}

The present invention relates to an interior construction method, and more particularly, to an interior construction method embodied so that the interior can be constructed using a mobile scaffold for interior work that can be moved after the worker boarding or loading an object during the interior work. will be.

In general, the place where the scaffolding is used is used when working at the height higher than the worker's height such as the exterior wall plastering and waterproofing of the general construction site, the washing work of the interior and exterior walls, and the indoor construction.

Therefore, the construction scaffolding structure, which is a temporary workbench used for easy assembly after assembling according to the working environment in the workplace, erects an H-beam-shaped vertical frame made of steel pipes correspondingly, and places a horizontal frame on the fastening protrusion protruding from side to side. Insert and fix it.

 In addition, the fixed vertical frame and the horizontal frame in order to reinforce the rigidity in the vertical frame installed in the cross-shaped cross frame in the X-shaped fastening protrusions fixed and then put the plate on the scaffold for the worker to work on the work Do it.

As described above, the conventional scaffolding is not only inconvenient to move, but also when the worker boards during the interior work such as the auditorium, the movement occurs due to the shaking, and the scaffold is tilted by a step such as a stairway, so that the occupant falls off and is safe. Had a problem that can cause an accident.

In addition, if the work space is higher than the assembled scaffolding, the small diameter joint is inserted into each corner of the vertical frame made of steel pipe, and then the scaffold is sequentially raised on the plate, and the vertical frame is inserted into the joint to be assembled by the worker.

On the other hand, the background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention. .

Korean Utility Model Model No. 20-1999-0032615 Korean Patent Publication No. 10-2013-0141413

One aspect of the present invention provides an interior construction method implemented to allow the interior to be constructed using a mobile scaffold for interior work that can be moved after the operator boards or loads objects during the interior work.

In addition, the present invention provides a mobile scaffold for interior work that can prevent the scaffold from falling down the steps of the stairs during interior work, such as stairs.

In addition, it is to provide an adhesive composition that can be applied to a sheet paper that can be attached to a pipe that can be gripped by the worker with a sufficient thickness and evenness, and can reduce the odor and bacteria generation.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

An interior construction method according to an embodiment of the present invention, the interior construction method for constructing the interior interior using a mobile scaffold for interior work, Prop preparation step for preparing a prop for the interior; An installation position selecting step of selecting an installation position according to an installation purpose of the prop; A scaffold installation step of installing the movable scaffold for interior work at an installation position of the accessory; And a prop construction step of constructing the prop using the movable scaffold for interior work.

In one embodiment, the movable scaffold for interior work, the body portion to form a skeleton of the scaffold by a vertical pipe installed in the vertical direction and a horizontal pipe installed in the horizontal direction between the vertical pipe; Scaffolding unit is installed in the horizontal direction in the inner space of the body portion to form a space for the worker to ride the interior work; And it may include a wheel which is installed on the lower side of each corner of the body portion.

In one embodiment, the footrest portion, the first footrest is installed in the interior space of the body portion; And a second scaffold spaced upward from the first scaffold and installed on an upper portion of an inner space of the body part.

In one embodiment, the body portion, forming a step so that the operator can climb to the first footrest or the second footrest, and the first footrest or the second footrest to prevent the worker or the loaded object from falling A railing can be formed along the edge of the.

In one embodiment, the wheel, the mounting plate is installed on the lower edge of the body portion; Is formed in the shape of a square pillar, the rotating portion is installed to be rotatable on the lower side of the mounting plate; A wheel mounting unit installed below the rotating unit; A wheel connected to the inner space of the wheel installation unit and rotating while moving along a bottom surface; And a first brake installed at one side of the wheel mounting unit to brake the wheel.

In one embodiment, the wheel is connected to the front end of the rotating part is rotatably connected, the body portion is rotated when the height difference is generated on the bottom surface to prevent the inclined to be pushed away from the height difference is formed on the wheel It may further include a second brake in close contact and braking.

In one embodiment, the second brake, the connecting projection formed on the front end of the rotating part in the moving direction when the body portion moves; It is formed to be bent in a "b" form is connected to one end rotatably connected to the connecting projection, when the height difference occurs in the moving direction of the body portion, the other end is dropped according to the height difference, the opposite surface with the wheel and the wheel A rotating frame moving in an approaching direction; A guide wheel connected to the other end of the rotation frame and rotating while moving along the bottom surface when the body is moved; An elastic body installed between the wheel mounting portion and the lower surface of the rotating frame facing the wheel mounting portion, and using the elastic force to pull the rotating frame in the direction of the wheel; And a close braking part installed on a lower side of the rotating frame facing the wheel, and closely contacted with the wheel as the rotating frame approaches the wheel direction to brake the wheel.

In one embodiment, the close contact braking portion is formed in the form of a flat plate and in close contact with the wheel; A case spaced apart from the upper plate and formed to form an inner space; And an upper plate support part installed in an inner space of the case and having an upper portion exposed to an upper side of the case to support the upper plate using an elastic force.

In one embodiment, the upper plate support portion, the first support portion for supporting the center of the upper plate, and supplying the filling liquid to the inner space as the upper plate is lowered; And installed at each lower side of each corner of the upper plate, and move upwards and downwards to support the edges of the upper plate by using an elastic force, and the upper plate is lowered in the vertical direction by the filling liquid supplied from the first support part as the upper plate descends. It may include a second support to which movement is braked.

In one embodiment, the first support portion, the first rotational fastening portion is provided in the center of the lower side of the upper plate, forming a spherical inner space; A first connection ball formed in a spherical shape corresponding to the shape of the inner space of the first pivot fastening part and installed to be rotatable in the inner space of the first pivot fastening part; A first support bar extending downward from the bottom of the first connection ball to support the first connection ball; It is formed in a cylindrical shape is installed in the inner space of the case, the filling liquid is received in the sealed inner space, the lower portion of the first support bar is inserted into the inner space, the first support bar when the upper plate is lowered A filling liquid tank in which a filling liquid is compressed and supplied to the second support part as a lower portion of the lower portion falls from an upper side of the inner space; And a connecting pipe extending from the lower portion of the filling liquid tank to the second support part to form a passage through which the filling liquid flows.

In one embodiment, the second support portion, the second pivotal fastening portion is installed at the corner of the lower side of the upper plate, forming a spherical inner space; A second connection ball formed in a spherical shape corresponding to the shape of the inner space of the second pivotal fastening part and rotatably installed in the inner space of the second pivotal fastening part; A second support bar extending downward from the bottom of the second connection ball to support the second connection ball; An elastic support installed at a lower side of the second support bar to support the second support bar using an elastic force; And a second support bar is inserted into the through hole to form a through hole in a vertical direction. When the upper plate descends, the filling liquid is supplied to the internal space through the connecting pipe and expands. Accordingly, the size of the through-hole may be reduced to include a lifting control unit for fastening so that the second support bar does not move.

In one embodiment, the elevating control unit, the outer wall is formed of a hard material so that the filling liquid can be expanded in the inward direction in which the through hole is located as it is supplied to the inner space, facing the second support bar The inner side may be formed of a material that can expand or contract.

According to one aspect of the present invention, in addition, by preventing the scaffold from falling down the steps of the stairs during the interior work, such as a staircase, the worker performing the interior work on the scaffold falls off the scaffold and is subjected to a safety accident. It can provide the effect of preventing in advance.

In addition, by providing an adhesive composition that can be applied to a sheet paper that can be attached to a pipe that can be gripped by workers, such as a sufficient thickness and evenness, and can reduce the odor and bacteria generation, by providing a hygienic and excellent adhesive It can provide the effect of providing a composition.

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the scope apparent to those skilled in the art from the following description.

1 is a flow chart illustrating an interior construction method according to an embodiment of the present invention.
2 is a view showing a schematic configuration of a mobile scaffold for interior work according to an embodiment of the present invention.
3 is a diagram illustrating an embodiment of the wheel of FIG. 2.
4 is a view showing another embodiment of the wheel of FIG.
FIG. 5 is a view for explaining a braking method of the second brake of FIG. 4.
6 and 7 illustrate another embodiment of the close contact brake of FIG. 5.
8 to 12 are views showing the connection of the respective components of the close contact brake of FIG.
FIG. 13 is a view illustrating another embodiment of the close contact brake of FIG. 5.
14 and 15 are views showing the supporting column of FIG. 13.
FIG. 16 is a view illustrating the cross elastic part of FIG. 14.
17 is a view illustrating the vertical elastic part of FIG. 15.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

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

1 is a flow chart illustrating an interior construction method according to an embodiment of the present invention.

Referring to FIG. 1, an interior construction method according to an embodiment relates to an interior construction method for constructing an interior interior using a mobile scaffold 10 for interior work, and firstly, an accessory (eg, a store) for an interior interior. Showcases, product shelves, arrangement of lighting fixtures, or furniture in houses) are prepared (S110).

The installation position (for example, a wall corner in the case of a product shelf, a ceiling in the case of a lighting fixture, etc.) according to the installation purpose of the accessory prepared in step S110 described above is selected (S120).

The mobile scaffold 10 for interior work is installed at the installation position of the accessory selected in the above-mentioned step S120 (S130).

Here, the working movable scaffold 10 is a mechanism for constructing a prop in a place out of reach of an operator, such as installing a lighting fixture on a ceiling, which will be described in detail with reference to FIG. 2.

Using the mobile scaffolding 10 for the interior work installed in step S130 described above (that is, riding on the upper side, or placing a prop or tool, etc.), the construction is to be installed in a place where the accessory should be installed (S140).

In the interior construction method having the above-described configuration, even when the interior of the place out of reach of the operator can be constructed safely by using the mobile scaffold 10 for interior work in consideration of the safety of the worker.

2 is a view showing a schematic configuration of a mobile scaffold for interior work according to an embodiment of the present invention.

Referring to FIG. 2, the movable scaffold 10 for interior work according to an embodiment of the present invention includes a body part 100, a footrest part 200, and a wheel 300.

The body part 100 forms a frame of scaffolding by a horizontal pipe 120 installed in a horizontal direction between the vertical pipe 110 installed in a vertical direction and the vertical pipe 110, and at least one scaffold inside. The unit 200 is installed.

In one embodiment, the body portion 100 forms a step 130 installed by using the horizontal pipe 120 so that the worker can ascend to the first footrest 210 or the second footrest 220, the worker or The handrail 140 may be formed using the horizontal pipe 120 along the edge of the first scaffold 210 or the second scaffold 220 to prevent the loaded object from falling.

The scaffold 200 is installed in a horizontal direction in the inner space of the body 100 so that a worker can form a space for carrying out interior work or loading an object such as a tool.

At this time, the scaffold 200 is spaced upward from the first scaffold 210 and the first scaffold 210 which are installed in the inner space of the body part 100 as shown in FIG. It may include a second footrest 220 is installed on the upper portion of the interior space.

In addition, the scaffold 200 may be installed in three or more stages when the space of the body portion 100 allows.

The wheel 300 is installed at the lower side of each vertical pipe 110 forming each corner of the body portion 100 and each corner of the body portion 100 for the movement of the present invention.

Scaffolding is a temporary construction that can be installed at a high place during construction work. It is a scaffold for material transportation or worker's passage and work. In terms of materials, scaffolding, pipe scaffolding, and usage It is divided into external scaffolding, internal scaffolding, horizontal scaffolding, moon scaffolding, simple scaffolding, ladder scaffolding, and scaffolding scaffolding, lap scaffolding, and twin scaffolding.

That is, the body portion 100 of the present invention is to perform a function as a frame to be maintained so that the shape of the scaffold, the footrest portion 200 of the present invention provides a space for the worker to work up It is to perform the function as a springboard.

The mobile scaffold 10 for interior work having the configuration as described above is installed on the outer wall of the building and does not serve as a scaffold as a passage for the worker to climb or transport the material, but to perform the indoor demolition work of the building. It corresponds to a scaffold for indoor installation that assists the worker to go up and perform the indoor demolition work easily at a high place for work out of reach of the worker.

In addition, the mobile scaffold 10 for interior work having the above-described configuration prevents the scaffold from falling down the steps of the stairs during the interior work in a place such as a stair, so that an operator who performs the interior work on the scaffold can It can prevent you from falling off and causing a safety accident.

In one embodiment, the vertical pipe 110 or the horizontal pipe 120 is aesthetically corrugated sheet for improving the aesthetics of the functional or appearance to prevent the rust of the pipe in the part that can be picked up or gripped by the worker (description (Not shown in the drawings for convenience) can be attached using an adhesive composition.

Adhesive composition according to an embodiment of the present invention, as a sheet adhesive adhesive composition for attaching the sheet to the vertical pipe 110 or horizontal pipe 120, 40 to 80 parts by weight of the thermoplastic resin, 5 to 40 weight of the adhesive resin Parts, 1 to 5 parts by weight of rosin, 1 to 10 parts by weight of plasticizer, 1 to 10 parts by weight of filler, and 0.1 to 1 parts by weight of antioxidant. The thermoplastic resin serves as a main component of the composition to control adhesion and cohesion. If the type includes a vinyl group or a hydroxyl group, the type is not particularly limited, and examples thereof include ethylene vinyl acetate copolymer, polyvinylacetate, polyvinyl alcohol, ethylene-acrylic acid copolymer and ethylene-methacrylic acid copolymer, and polyurethane. It may be composed of any one or more selected from the group consisting of.

The content of the thermoplastic resin is preferably 40 to 80 parts by weight based on the total composition. If the content is less than 40 parts by weight, the melt viscosity is high and the melt flow index is low, the workability is very poor, if the content is more than 80 parts by weight it is difficult to exert sufficient adhesive force to be applied directly to the fabric.

The tackifier resin is a low molecular weight resin, lowers the melt viscosity to improve workability, improves the initial wettability of adhesion and adhesion of the adhesive on the surface of the adherend, and enables control of the solidification time.

The tackifying resin is not particularly limited in kind, but is preferably a petroleum resin. More specifically, the tackifier resin may be composed of one or more selected from the group consisting of aliphatic hydrocarbon resins, alicyclic hydrocarbon resins, aromatic hydrocarbon resins, aromatic hydrocarbon-modified aliphatic hydrocarbon resins, and hydrogenated hydrocarbon resins.

The aliphatic hydrocarbon resins are commercial products such as Hikorez A-1100, Hikorez A-1100S, Hikorez C-1100, Hikorez R-1100, Hikorez R-1100S, and the like. In addition, alicyclic hydrocarbon resins include hydrocarbon resins containing dicyclopentadiene (DCPD) as monomers, and aromatic hydrocarbon resins are commercially available from Kolon Oil Co., Ltd. of Hikotack P-110S, Hikotack P-120, Hikotack P-120HS, Hikotack P-120S, Hikotack P-140, Hikotack P-140M, Hikotack P-150, Hikotack P-160, Hikotack P-90, Hikotack P-90S, Hirenol PL-1000, Hirenol PL-400. In addition, aromatic hydrocarbon-modified aliphatic hydrocarbon resins include Hikorez T-1080, Hikorez T-1100, etc. of Kolon Oils. Hydrogenated hydrocarbon resins can also be subdivided into hydrogenated aliphatic hydrocarbon resins, hydrogenated aromatic hydrocarbon resins, and the like, and commercially available from Kolon Oil, Sukorez D-300, Sukorez D-390, Sukorez SU-100, Sukorez SU-110, Sukorez SU-120, Sukorez SU-130 and Sukorez SU-90.

The tackifier resin is preferably a hydrocarbon resin having 4 to 10 carbon atoms in the monomer, and specifically, a C5 aliphatic resin, a C9 aromatic resin, a C5 / C9 aliphatic / aromatic copolymer resin, or the like may be used.

In addition, the tackifying resin of the present invention is more preferably characterized in that the hydrocarbon hydrocarbon resin containing dicyclopentadiene as a monomer, commercially available from Sukorez D-300, Sukorez D-390, Kolon Emulsifier (Korea), Sukorez SU-100, Sukorez SU-110, Sukorez SU-120, SukorezSU-130 and Sukorez SU-90.

On the other hand, the adhesive composition of the present invention is mixed with the biodegradable hypoallergenic resin in the various petroleum resins described above in order to minimize irritation when the operator touches the skin of the operator when applied to the vertical pipe 110 or horizontal pipe 120 It is preferable to use it.

The biodegradable hypoallergenic resin may be prepared by melt-mixing a monomer of a polymer into a biodegradable polymer, and polylactic acid is preferably used as the biodegradable polymer.

The polylactic acid is a polyester synthesized by polycondensation of lactate or ring-opening polymerization of lactide, and has a medium physical property between polyamide and polyethylene terephthalate, and is mainly made of natural vegetable sugar components obtained from potatoes and corn. Biodegradability is high, but generally has high hardness, low elasticity, and poor durability.

The biodegradable polymer is melt-mixed with the same polymer monomer, wherein the biodegradable polymer is partially bonded with the monomer to cause chain breakage, thereby lowering the overall number average molecular weight. As the number average molecular weight falls, the physical properties that can be used as an adhesive are exhibited, and the workability is increased.

With respect to 100 parts by weight of the polylactic acid, the lactic acid monomer may be mixed 20 to 30 parts by weight. When the monomer is mixed in less than 20 parts by weight, the number average molecular weight is high and hard to be used as a pressure-sensitive adhesive, when the monomer exceeds 40 parts by weight migration may occur on the surface and may also be difficult to use as an adhesive.

It is preferable that the mixing ratio of the petroleum resin and the biodegradable hypoallergenic resin is 1 to 2: 1 (w / w). When the mixing ratio of the petroleum resin is too high, the biodegradable hypoallergenic effect is less likely to occur. If the mixing ratio is too high, economic efficiency may be lowered and the overall adhesive effect may be lowered.

In addition, the content of the tackifying resin is preferably 5 to 40 parts by weight relative to the total composition. If the content is less than 5 parts by weight, the effect of lowering the melt viscosity due to the addition of the tackifying resin is insufficient, and there is a fear that the increase in the melt flow index is not so large that the workability may not be satisfactorily reached, and the content is more than 30 parts by weight. If the melt flow index increase rate due to the excess of the tackifier resin is not large, the economical efficiency is lowered and the content of the thermoplastic polymer is relatively reduced, thereby reducing the overall physical properties of the composition.

The rosin acts to improve the overall adhesion of the adhesive composition and is harmless to the human body and acts as a natural preservative. The content of the rosin is preferably 1 to 5 parts by weight based on the total composition. If the content is less than 1 part by weight, it is difficult to obtain an effect of improving the adhesive strength, and if the content exceeds 5 parts by weight, there is a problem in that the adhesion is increased during processing and processing into the product becomes difficult.

The plasticizer is used to impart flexibility and adhesion to the polymer, and the type of plasticizer according to the present invention is not particularly limited, and for example, sorbitol, ethylene glycol, glycerin, glycerin diacetate, and pentaerythritol It may consist of one or more selected from the group consisting of.

The amount of the plasticizer is preferably 1 to 10 parts by weight based on the total composition. If the content is less than 1 part by weight, the effect of the addition of the plasticizer is insignificant. If the content is more than 10 parts by weight, the economical efficiency may be reduced by excessive use of the plasticizer, and there is a concern that the overall physical properties of the adhesive may be lowered.

The filler is used to control the reinforcement and flow of the composition. The type of filler is not particularly limited, and for example, calcium carbonate, clay, bentonite, calcium stearate or the like can be used.

On the other hand, the adhesive composition of the present invention is applied to the attachment surface of the vertical pipe 110 or the horizontal pipe 120, the odor and bacteria are likely to occur in the application environment. Therefore, in order to reduce the odor and bacteria generation while controlling the reinforcement and flow of the adhesive composition, it is preferable to use a mixture of stone powder and pulp powder as a filler. Stone powder can achieve high strength without using additives due to the compactness of the particles, and the cracking of the adhesive hardly occurs even when the temperature change is large due to low volumetric strain according to the surrounding environment.

The stone powder may be used in the form of powder of various rocks such as loess, marble, ganban stone, granite, jadeite, preferably characterized in that the loess has various functions such as antibacterial, anti-fungal, UV emission.

The pulp powder serves to agglomerate the stone powders while sucking the liquid components, to improve the miscibility and improve the cohesion between the components. At this time, the stone powder and the pulp powder is preferably mixed in a ratio of about 7: 3 to 8: 2 (w / w).

The content of the filler is preferably 1 to 10 parts by weight based on the total composition. If the content is less than 1 part by weight, the effect of adding the filler is insignificant, and if the content is more than 10 parts by weight, there is a concern that the overall physical properties of the adhesive may be lowered.

The antioxidant is intended to improve the change in viscosity, yellowing, deterioration of adhesion and degradation of durability due to oxidation and decomposition, and the type thereof is not particularly limited, and specifically, phenols, aromatic amines, citric acid, or ascorbic acid may be used. Can be.

The content of the antioxidant is preferably 0.1 to 1 parts by weight relative to the total composition. If the content is less than 0.1 part by weight, the effect of the addition of the antioxidant is insignificant, and if the content exceeds 1 part by weight, not only the economical efficiency of the adhesive is lowered but also the overall physical properties may be lowered.

On the other hand, the adhesive composition of the present invention may further include nano-silica to improve the adhesion by allowing to be uniformly distributed on the attachment surface of the vertical pipe (110) or horizontal pipe (120). At this time, the content of the nano silica is preferably 0.1 to 5 parts by weight, and the size of the nano silica (primary particles) is preferably 100 nm or less.

If the content of the nano-silica is less than 0.1 parts by weight, the effect of the addition of nano-silica is insignificant, and if the content exceeds 5 parts by weight, not only the adhesive force is lowered but also a bad phenomenon that blooming (blooming) occurs on the surface of the adhesive over time May occur.

Hereinafter, the configuration of the present invention and its effects through specific examples and comparative examples will be described in more detail. However, this embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

Example 1

60 parts by weight of ethylene-vinylacetate copolymer, 25 parts by weight of Sukorez D-300, 3 parts by weight of rosin, 5 parts by weight of ethylene glycol, 4 parts by weight of ocherite, 2 parts by weight of pulp powder and 1 part by weight of ascorbic acid. Melt kneading at ° C to prepare an adhesive composition and then molded into pellets. At this time, the biodegradable hypoallergenic resin was prepared by melt-mixing 2.5 parts by weight of lactic acid monomer to 100 parts by weight of polylactic acid at 160 ° C. for 5 minutes.

Example 2

60 parts by weight of ethylene-vinylacetate copolymer, 15 parts by weight of Sukorez D-300, 10 parts by weight of biodegradable hypoallergenic resin, 3 parts by weight of rosin, 5 parts by weight of ethylene glycol, 4 parts by weight of loess, 2 parts by weight of pulp powder and ascorb 1 part by weight of acid was mixed and melt kneaded at 170 to 180 ° C. to prepare an adhesive composition, and then molded into pellets. At this time, the biodegradable hypoallergenic resin was prepared by melt-mixing 2.5 parts by weight of lactic acid monomer to 100 parts by weight of polylactic acid at 160 ° C. for 5 minutes.

Example 3

Except for adding 1 part by weight of nanosilica, it was prepared in the same manner as in Example 1, and was made as Example 3.

[Comparative Example]

It was used after removing the backing paper from the conventional TPU hot melt film.

Experimental Example

(1) Mesh adhesive strength

In order to evaluate the mesh adhesive strength of the hot melt adhesive, the adhesive pellet quantified between the vertical pipe 110 or the horizontal pipe 120 and the sheet was melt-coated at 170 ° C., and 60 kgf / cm 2 at 130 ° C. for 30 seconds. Press work was carried out at the pressure of and the mesh adhesive strength (kgf / ㎠) was measured.

(2) Melt Flow Index

The heating cylinder of the melt flow rate meter was filled with a pellet type adhesive and melted at 160 ° C. for about 5 minutes. The weight (g) of the adhesive passed through the cylinder for 10 minutes was measured by putting a weight of 3 kg.

As can be seen from the table, it was confirmed that the adhesive composition of the present invention has improved adhesion and flow index than the existing product, even when using a biodegradable hypoallergenic resin it was confirmed that the adhesion and flow index does not fall significantly. Also, when the nano-silica is mixed, the flow index can be seen to increase significantly.

3 is a diagram illustrating an embodiment of the wheel of FIG. 2.

Referring to FIG. 3, the wheel 300 according to an embodiment includes a mounting plate 310, a rotating part 320, a wheel mounting part 330, a wheel 340, and a first brake 350.

The mounting plate 310 is formed in a flat plate shape and is installed in a horizontal direction under the corners of the body portion 100, that is, under each vertical pipe 110 forming each corner of the body portion 100.

The rotating part 320 is formed in the form of a square pillar, is installed to be rotatable on the lower side of the mounting plate 310, the wheel mounting portion 330 is installed on the lower side.

The wheel mounting unit 330 is installed at the lower side of the rotating unit 320, is opened in the lower direction, and the wheel 340 is connected to the opening to rotate.

The wheel 340 is connected to the inner space of the wheel installation unit 330 and rotates while moving along the bottom surface.

The first brake 350 is installed at one side of the wheel mounting unit 330 to brake the wheel 340.

Wheel 300 according to an embodiment of the present invention having the configuration as described above, as the operator manually rotates the first brake 350, the wheel 340 is braked to move the present invention is stopped will be.

On the other hand, the other wheel 300a in another embodiment to be described later will be described below as implemented to automatically stop the rotation of the wheel 340 even when there is no drive by the operator.

4 is a view showing another embodiment of the wheel of FIG.

Referring to FIG. 4, the wheel 300a according to another embodiment may include a mounting plate 310, a rotating part 320, a wheel mounting part 330, a wheel 340, a first brake 350, and a second brake. 360. Here, since the mounting plate 310, the rotating unit 320, the wheel mounting unit 330, the wheel 340 and the first brake 350 is the same as the components of Figure 3, the description thereof will be omitted.

The second brake 360 is connected to the front end of the rotating part 320 so as to be rotatable, and the bottom of the body 100 is prevented from being pushed away and inclined at the place where the height difference is formed (S of FIG. 5). When the height difference (S) occurs in the rotation is in close contact with the wheel 340 to brake.

According to another embodiment having the configuration as described above, the wheel 300a is different from the intention of the worker due to the inclined floor surface during the interior work while the worker is on the board of the present invention. Where the difference in height occurs, such as the present invention is inclined to prevent workers from falling off safety accidents.

To this end, the wheel 300a according to another embodiment having the configuration as described above, when the height difference (S) occurs during the movement of the present invention, as shown in FIG. In this case, the present invention stops moving by being in close contact with the wheel 340 so that the wheel 340 does not rotate any more, thereby preventing a worker from being injured. .

Referring to FIG. 4, the second brake 360 may include a connection protrusion 361, a rotation frame 362, a guide wheel 363, an elastic body 364, and a close brake 400.

The connecting protrusion 361 is formed at the front end of the rotating part 320 in the moving direction when the body part 100 moves, and one end (that is, the upper side) of the rotating frame 362 is the bolt B and the nut N. It is connected so as to be rotatable by a fastening means such as a).

Rotating frame 362 is formed to be bent in a "b" form is connected to one end rotatably connected by a fastening means such as bolts (B) and nuts (N) to the connecting projection (361), the body portion 100 When the height difference (S) is generated in the moving direction of the other end is dropped according to the height difference (S), the surface facing the wheel 340, that is, the part where the close brake 400 is installed is close to the wheel 340. Move in the direction of losing.

At this time, the rotation frame 362, the bending angle is formed at an angle larger than the right angle, such as 90 ° to 120 °, rather than being formed at a right angle (that is, 90 °) to reduce the fall angle according to the height difference (S) It will be desirable to form larger.

In addition, the rotation frame 362 is in close contact with the lower side facing the wheel 340 so as to improve the adhesion between the close contact braking unit 400 and the wheel 340 than in the case of free fall due to the height difference S. Braking unit 400 is to be installed.

The guide wheel 363 is connected to the other end of the rotation frame 362 (that is, the lower side), and rotates while moving along the bottom surface when the body part 100 moves.

The elastic body 364 is installed between the wheel mounting portion 330 and the lower surface of the rotating frame 362 facing the wheel mounting portion 330, and uses the elastic force to move the rotating frame 362 in the direction of the wheel 340. By pulling in, the braking force of the wheel 340 by the close brake 400 is improved.

The close contact braking part 400 is formed of a material having elasticity, such as rubber, to improve the adhesion, and is installed on the lower side of the rotation frame 362 facing the wheel 340, and the rotation frame 362 is As the wheel 340 approaches, the wheel 340 comes into close contact with the wheel 340 to brake the wheel 340.

6 and 7 illustrate another embodiment of the close contact brake of FIG. 5.

6 and 7, the close contact brake part 400a according to another embodiment may be a mechanical connection structure instead of the close contact brake part 400 according to an embodiment, which is formed of a material having elasticity. The elastic force is improved to be in close contact with the wheel 340 to be braking, and includes a top plate 410, a case 420, and a top plate support 430.

At this time, the close contact braking portion (400a), as shown in Figure 6 may be formed of two or more.

The upper plate 410 is formed in a flat plate shape, is in close contact with the wheel 340, and is supported by the upper plate support part 430.

The case 420 is spaced apart from the lower side of the upper plate 410 and forms an inner space for installing the upper plate support part 430.

The upper plate supporter 430 is installed in the inner space of the case 420, and an upper portion thereof is exposed to the upper side of the case 420 to support the upper plate 410 using elastic force.

In the close contact brake part 400a according to another embodiment having the configuration as described above, the case 420 is installed on the lower surface of the rotation frame 362 facing the wheel 340, and the rotation frame 362 is As the wheel 340 approaches, the top plate 410 and the wheel 340 supported by the top plate support part 430 forming an elastic force close to each other to brake the wheel 340.

8 to 12 are views showing the connection of the respective components of the close contact brake of FIG.

Referring to FIG. 8, the upper plate support part 430 includes a first support part 431 and a plurality of second support parts 432a, 432b, 432c, and 432d.

The first support part 431 supports the center of the top plate 410, and supplies the filling liquid to the plurality of second support parts 432a, 432b, 432c, and 432d in the inner space as the top plate 410 descends. .

The second support parts 432a, 432b, 432c, and 432d are respectively installed at the lower sides of the corners of the upper plate 410, and support the edges of the upper plate 410 by using an elastic force while being moved upward and downward, and the upper plate 410. As the) is lowered, movement in the vertical direction is braked by the filling liquid supplied from the first support part 431.

The upper plate support portion 430 having the above-described configuration efficiently supports the upper plate 410 using elastic force by using the first support portion 431 and the plurality of second support portions 432a, 432b, 432c, and 432d. can do.

9 to 11, the first support part 431 includes a first pivotal fastening part 4311, a first connection ball 4312, a first support bar 4313, a filling liquid tank 4314, and a connection. Tube 4315.

As shown in FIG. 9, the first pivot fastening part 4311 is installed at the center of the lower side of the upper plate 410, and forms a spherical inner space to connect the first connection balls 4312.

The first connecting ball 4312 is formed in a spherical shape corresponding to the shape of the internal space of the first pivot fastening portion 4311, is installed to be rotatable in the internal space of the first pivot fastening portion 4311, and the first Supported by a support bar 4313.

The first support bar 4313 extends from a lower portion of the first connecting ball 4312 to an inner space of the filling liquid tank 4314 in a downward direction to support the first connecting ball 4312, and the upper plate 410. As it descends, it descends together and compresses the filling liquid contained in the filling liquid tank 4314 in the downward direction.

Filling tank 4314 is formed in a cylindrical shape is installed in the inner space of the case 420, the filling liquid is received in the sealed inner space, the lower portion of the first support bar 4313 is inserted into the inner space When the upper plate 410 is lowered, as the lower portion of the first support bar 4313 descends from the upper side of the inner space, the filling liquid is compressed to be supplied to the second support part 432 through the connecting pipe 4315.

At this time, the first support bar 4313 is a rubber corresponding to the shape of the inner space of the filling liquid tank 4314 so that the filling liquid contained in the filling space of the filling liquid tank 4314 can be compressed in the same way as the syringe driving method. Packing material P may be formed on the lower side.

The connecting pipe 4315 extends from the lower portion of the filling liquid tank 4314 to the respective second supporting portions 432a, 432b, 432c, and 432d to form a passage through which the filling liquid flows.

Hereinafter, the second support part 432 will be described.

The second support part 432 includes a second pivotal fastening part 4321, a second connecting ball 4322, a second support bar 4323, an elastic support part 4324, and a lift adjusting part 4325.

As shown in FIG. 9, the second pivot fastening part 4321 is installed at a corner of the lower surface of the upper plate 410, and forms a spherical inner space to connect the second connection balls 4322.

The second connecting ball 4322 is formed in a spherical shape corresponding to the shape of the internal space of the second pivotal fastening part 4321, and is installed to be rotatable in the internal space of the second pivotal fastening part 4321. Supported by support bars 4323.

The second support bar 4323 extends from the lower portion of the second connection ball 4322 to the inner space of the case 420 in a downward direction to support the second connection ball 4322, and to the elastic support part 4324. Is supported.

The elastic support part 4324 is provided below the second support bar 4323 to support the second support bar 4323 in the inner space of the case 420 by using an elastic force.

The elevating adjustment part 4325 is formed in the shape of a circular tube that forms the through hole 4325h in the vertical direction, and the second support bar 4323 is inserted into the through hole 4325h, and the upper plate 410 is lowered. In this case, as the filling liquid is supplied to the internal space through the connecting pipe 4315 and expanded, the size of the through hole 4325h is reduced so that the second support bar 4323 is not moved.

In one embodiment, the elevating control unit 4325 has an outer wall 4325o to expand in the inward direction in which the through hole 4325h is located as the filling liquid is supplied to the inner space as shown in FIG. 12. It may be formed of a hard material, and the inner side 4325i facing the second support bar 4323 may be formed of a material that can expand or contract.

The upper plate support part 430 having the above-described configuration supports the upper plate 310 by using the first support part 431 and the plurality of second support parts 432a, 432b, 432c, and 432d, and forms an elastic force. By using a plurality of second supports 432a, 432b, 432c, and 432d, each corner of the upper plate 310 is basically supported, and the upper plate 310 has elastic force of each of the second supports 432a, 432b, 432c, and 432d. When the first support 431 is lowered by lowering the pressure, the filling solution contained in the first support 431 is compressed and supplied to each of the second support parts 432a, 432b, 432c, and 432d, which are being lowered together. Due to expansion due to the supply of the filling liquid, the lowering of each of the second supporting parts 432a, 432b, 432c, and 432d is prevented, so that the lowering of the upper plate 310 is gradually increased.

That is, the upper plate 310 is initially supported using only the elastic force of each of the second support parts 432a, 432b, 432c, and 432d, but is supplied from the first support part 431 as the first support part 431 descends together. The downward driving of the upper plate 310 is reduced by adding up to a resistance value generated by the adhesion force due to the filling liquid.

FIG. 13 is a view illustrating still another embodiment of the close contact brake of FIG. 5.

Referring to FIG. 13, the close contact braking unit 500 according to another embodiment includes a support frame 540, four support plates 510, four pairs of support frames 520, and a support column 530. do.

The supporting frame 540 is supported by the supporting plate 510 installed at the lower side, and is formed in a flat plate shape to be in close contact with the wheel 340 to brake the support frame 540.

The supporting plate 510 supports the supporting frame 540 seated on the upper side and is supported by the supporting pillar 530 by the supporting frame 520 connected to the lower side.

That is, the supporting plate 510 seats the supporting frame 540 on the upper side thereof, and in response to the vibration or shock transmitted from the supporting frame 540, the supporting plate 510 is oriented in the horizontal direction (ie, the first frame 521a). Alternatively, vibration or shock may be attenuated by being absorbed by the support frame 520 sliding in the up and down direction (ie, the second frame 521b).

In addition, the present invention is formed by varying the length of the first frame (521a) or the second frame (521b), to overcome the limitations of the existing elastic body that can reduce the impact by simply adjusting the height in the vertical direction The support position by the plate 510 can be freely adjusted not only in the vertical direction but also in the left and right directions.

The support frame 520 is connected to rotatably two frames of the first frame 521a and the second frame 521b at each lower portion of the four support plates 510 to support the plate 510. As described above, the support position of the support frame 540 by the plate 510 is determined by adjusting the length of the first frame 521a or the second frame 521b.

At this time, the upper part of the first frame 521a and the second frame 521b is connected to the lower part of the support plate 510, and the lower part of the first frame 521a is rotated on the upper side of the support column 530. The lower surface of the second frame 521b is connected and installed to enable horizontal sliding movement, and the lower side of the second frame 521b is connected to one side of the support pillar 530 so as to allow rotational and vertical sliding movement.

That is, the first frame 521a or the second frame 521b may be subjected to vibration or shock transmitted from the support plate 510 through a pivoting or sliding movement by elastic force on the upper surface or one side of the support pillar 530. The support pillar 530 is transferred.

The support pillar 530 is formed in the shape of a square pillar, and the lower portion of the first frame 521a is connected to the upper side so as to be rotated and horizontally slidably moved, and the lower portion of the second frame 521b is one side. It is connected to the rotational and vertical sliding movement in the installation, and the elastic force (ie, the cross-elastic portion 533 or vertical elastic portion 535) during the sliding movement of the first frame (521a) or the second frame (521b) Absorbs vibrations or shocks through.

Each of the supporting plate 510 or the supporting frame 520 is driven by the same method as the symmetrical structure of each other, and the contents described with respect to the one supporting plate 510 or the supporting frame 520 as described above are described. The same may be applied to the other support plate 510 or the other support frame 520, the description thereof will be omitted.

In addition, the close contact braking unit 500 having the above-described configuration may be formed in a vertically symmetrical structure. In FIG. 13, only the upper portion of the support pillar 530 is illustrated. The configuration associated with the four support plates 510 and the four pairs of support frames 520 as described above may be equally applicable to the lower portion of the support pillar 530.

14 and 15 are views showing the supporting column of FIG. 13.

Referring to FIG. 14, the support pillar 530 includes a pillar body 531, a cross groove 532, a cross elastic portion 533, four vertical grooves 534 (see FIG. 15), and four vertical elastic portions. 535 (see FIG. 15).

The pillar body 531 is formed in the shape of a square pillar, a cross groove 532 is formed on the upper portion, the vertical groove 534 is formed on each side.

The cross grooves 532 are recessed and formed in the upper portion of the pillar body 531 in a "+" shape, and a cross elastic portion 533 is inserted into the inner space.

The cross resilient portion 533 is formed in a shape corresponding to the shape of the cross groove 532 and is inserted into the cross groove 532, so that the lower side of the first frame 521a is rotatable on the upper ends of the four branches. It is connected and installed to absorb the vibration or shock transmitted from the first frame 521a by using the elastic force to attenuate the vibration or shock.

The vertical groove 534 is formed in each of the surface of the pillar body 531 in the vertical direction, the vertical elastic portion 535 is inserted into the interior space.

The vertical elastic portion 535 is formed in a shape corresponding to the shape of the vertical groove 534 is inserted into the vertical groove 534, the lower side of the second frame 521b is connected to the upper outer side so as to be rotatable and elastic force By absorbing the vibration or shock transmitted from the second frame 521b to reduce the vibration or shock.

FIG. 16 is a view illustrating the cross elastic part of FIG. 14.

Referring to FIG. 16, the cross elastic part 533 includes a cross case part 5313, an upper support part 5332, four upper elastic parts 5333, four upper elastic support parts 5340, and four upper connecting links. A part 5335 is included.

The cross case portion 5313 has an inner space formed in an empty " + " shape and is inserted into the cross groove 532, and includes an upper support portion 5332, four upper elastic portions 5333, and four which are described later in the inner space. Top elastic support parts 5340 are installed.

At this time, the length of each branch of the cross case portion 5311 is formed shorter than the length of each branch of the cross groove 532, as shown in Figure 16, the upper portion in the space formed on the outside of the cross case portion (5331) The connecting link portion 5335 may be disposed and may form a space for sliding movement.

The upper support part 5332 is formed of a cube, and is disposed at the center of the cross case part 5311, so that the upper elastic part 5333 is disposed outside each of the four surfaces, and supports the upper elastic part 5333. do.

The upper elastic part 5333 is disposed on each side surface of the upper support part 5332 to support the upper elastic support part 5340 by elastic force, thereby absorbing vibrations or shocks transmitted from the upper elastic support part 5344.

The upper elastic support part 5340 is disposed at each end of each branch of the internal space of the cross case part 5313, is supported by the elastic force of the upper elastic part 5333, and is provided between the upper connection link parts 5335. The upper connecting link portion 5335 is supported by the support bar 5336.

The upper link link portion 5335 is disposed at each end of each branch of the cross groove 532, and is provided between the side of the cross case portion 5313 and the support bar 5336 provided between the upper elastic support portion 5340. It is maintained at a predetermined interval by a), and the lower side of the first frame 521a is connected to the upper side so as to be rotatable, and each branch of the cross groove 532 meets in accordance with the vertical movement of the plate 510. Sliding along the groove of the cross groove 532 in the center direction.

17 is a view illustrating the vertical elastic part of FIG. 15.

Referring to FIG. 17, the vertical elastic part 535 includes a vertical case part 5331, a side support part 5332, a side elastic part 5344, a side elastic support part 5344, and a side connection link part 5345. do.

The vertical case portion 5331 is formed in a shape corresponding to the shape of the vertical groove 534 in which the inner space is empty, and the side support portion 5332, the side elastic portion 5431, and the side elastic support portion 5344 are formed from the lower side of the inner space. ) Are installed in order.

The side support part 5332 is formed of a cube, is disposed in a lower space of the vertical case part 5331, and a side elastic part 5435 is disposed on the upper side to support the side elastic part 5435.

The side elastic part 5343 is disposed above the side support part 5332, and supports the side elastic support part 5344 disposed above by the elastic force, thereby preventing vibration, shock, and the like transmitted from the side elastic support part 5344. Will be absorbed.

The side elastic support part 5344 is disposed above the inner space of the vertical case part 5331, is supported by the elastic force of the side elastic part 5435, and is provided between the side connecting link parts 5345. It supports the side link link portion 5345 by.

The side link link portion 5345 is disposed at an upper end of the vertical groove 534 and is provided between a lower side facing the vertical case portion 5331 and an upper side of the side elastic support portion 5344. It is maintained at a predetermined interval by a), and the lower side of the second frame 521b is connected to the outer side so as to be rotatable, and slides along the groove of the vertical groove 534 in the lower direction of the vertical groove 534. .

The above-described embodiments are for illustrative purposes, and those of ordinary skill in the art to which the above-described embodiments belong may easily change to other specific forms without changing the technical spirit or essential features of the above-described embodiments. I can understand. Therefore, it is to be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected by the present specification is represented by the following claims rather than the above description, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and their equivalents. .

10: Portable scaffolding for interior work
100: body
110; Vertical pipe
120; Horizontal pipe
130: stairs
140: handrail
200: scaffolding
210: first footrest
220: second footrest
300: wheels
310: mounting plate
320: rotating part
330: wheel mounting
340: wheel
350: first brake
360: second brake
400: close contact brake
410: tops
420: case
430: top support
431: first support
432: second support

Claims (2)

In the interior construction method of constructing the interior interior using a mobile scaffold for interior work,
A prop preparation step of preparing a prop for an indoor interior;
An installation position selecting step of selecting an installation position according to an installation purpose of the prop;
A scaffold installation step of installing the movable scaffold for interior work at an installation position of the accessory; And
And a prop construction step of constructing the prop using the movable scaffold for interior work.
The mobile scaffold for interior work may include: a body part forming a skeleton of the scaffold by a horizontal pipe installed in a horizontal direction between a vertical pipe installed in a vertical direction and the vertical pipe; Scaffolding unit is installed in the horizontal direction in the inner space of the body portion to form a space for the worker to ride the interior work; And wheels installed below each corner of the body portion,
The scaffolding portion, a first scaffold installed in the inner space of the body portion; And a second scaffold spaced upwardly from the first scaffold and installed on an upper portion of an inner space of the body part.
The body portion forms a stair so that an operator can climb to the first footrest or the second footrest, and a handrail along an edge of the first footrest or the second footrest to prevent the worker or the loaded object from falling. Form the
The wheel, the mounting plate is installed on the lower corner of the body portion; Is formed in the shape of a square pillar, the rotating portion is installed to be rotatable on the lower side of the mounting plate; A wheel mounting unit installed below the rotating unit; A wheel connected to the inner space of the wheel installation unit and rotating while moving along a bottom surface; And a first brake installed at one side of the wheel mounting part to brake the wheel.
The wheel is connected to the front end of the rotating part so as to be rotatable, and when the height difference is generated on the bottom surface to prevent the body portion from being pushed off and tilted at the height difference is formed to rotate and close to the wheel to brake 2 more brakes,
The second brake may include a connection protrusion formed at a front end of the rotating part facing a moving direction when the body part moves; It is formed to be bent in a "b" form is connected to one end rotatably connected to the connecting projection, when the height difference occurs in the moving direction of the body portion, the other end is dropped according to the height difference, the opposite surface with the wheel and the wheel A rotating frame moving in an approaching direction; A guide wheel connected to the other end of the rotation frame and rotating while moving along the bottom surface when the body is moved; An elastic body installed between the wheel mounting portion and the lower surface of the rotating frame facing the wheel mounting portion, and using the elastic force to pull the rotating frame in the direction of the wheel; And a close braking part installed on a lower side of the rotating frame opposite to the wheel, and closely contacting the wheel to brake the wheel as the rotating frame approaches the wheel direction.
The close contact brake may include: a top plate formed in a flat plate shape and in close contact with the wheel; A case spaced apart from the upper plate and formed to form an inner space; And an upper plate support part installed in an inner space of the case and having an upper portion exposed to an upper side of the case to support the upper plate using an elastic force.
The upper plate support unit may support a center of the upper plate, the first support unit for supplying a filling liquid into the inner space as the upper plate is lowered; And installed at each lower side of each corner of the upper plate, and move upwards and downwards to support the corners of the upper plate by using an elastic force, and the upper plate is lowered in the vertical direction by the filling liquid supplied from the first support unit as the upper plate descends. A second support to which movement is braked,
The first support portion, the first rotational fastening portion is provided in the center of the lower side of the upper plate, forming a spherical inner space; A first connection ball formed in a spherical shape corresponding to the shape of the inner space of the first pivot fastening part and installed to be rotatable in the inner space of the first pivot fastening part; A first support bar extending downward from the bottom of the first connection ball to support the first connection ball; It is formed in a cylindrical shape is installed in the inner space of the case, the filling liquid is accommodated in the sealed inner space, the lower portion of the first support bar is inserted into the inner space, when the upper plate is lowered the first support bar A filling liquid tank in which a filling liquid is compressed and supplied to the second support part as a lower portion of the lower portion falls from an upper side of the inner space; And a connecting pipe extending from the lower portion of the filling liquid tank to the second supporting portion to form a passage through which the filling liquid flows.
The second support part may include a second pivotal fastening part installed at an edge of a lower side of the upper plate and forming a spherical inner space; A second connection ball formed in a spherical shape corresponding to the shape of the inner space of the second pivotal fastening part and rotatably installed in the inner space of the second pivotal fastening part; A second support bar extending downward from the bottom of the second connection ball to support the second connection ball; An elastic support installed at a lower side of the second support bar to support the second support bar using an elastic force; And a second support bar is inserted into the through hole to form a through hole in a vertical direction. When the upper plate descends, the filling liquid is supplied to the internal space through the connecting pipe and expands. According to the size of the through hole is reduced to include a lifting control unit for fastening so that the second support bar does not move,
The elevating control unit, the outer wall is formed of a hard material so that the filling liquid is expanded to the inner direction in which the through hole is located as the filling liquid is supplied, the inner side facing the second support bar is expanded or contracted The interior construction method is formed of a possible material.
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