KR20160137723A - A variable type gang form - Google Patents

A variable type gang form Download PDF

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Publication number
KR20160137723A
KR20160137723A KR1020150070414A KR20150070414A KR20160137723A KR 20160137723 A KR20160137723 A KR 20160137723A KR 1020150070414 A KR1020150070414 A KR 1020150070414A KR 20150070414 A KR20150070414 A KR 20150070414A KR 20160137723 A KR20160137723 A KR 20160137723A
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KR
South Korea
Prior art keywords
cage
fixed
variable
screw shaft
building
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KR1020150070414A
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Korean (ko)
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KR101684678B1 (en
Inventor
최성봉
서웅율
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일웅이엔지(주)
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Priority to KR1020150070414A priority Critical patent/KR101684678B1/en
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Publication of KR101684678B1 publication Critical patent/KR101684678B1/en

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28Mobile scaffolds; Scaffolds with mobile platforms
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00Component parts or accessories for scaffolds
    • E04G5/007Devices and methods for erecting scaffolds, e.g. automatic scaffold erectors

Abstract

The present invention relates to a variable mold capable of being installed in accordance with the external shape of a building so as to improve safety and comprises a molded foam and a cage which is formed on the outer periphery of the molded foam to enable formation and exterior work of the external wall, The cage is constituted by a fixed cage and a variable cage formed at one end or both ends of the fixed cage, the fixed cage being arranged at a predetermined interval, thereby adjusting the interval between neighboring cages installed on the outer periphery of the building So that a safe cage can be installed without installing a separate stabilizer.
To this end, according to the present invention, there is provided a gantry comprising a molded foam and a cage installed outside the molded foam so as to be able to perform an outer wall forming process and an outer wall forming process, The cage 120 includes a fixed cage 122 having a constant width; A variable cage 124 configured to be spaced at a predetermined distance from one end or both ends of the fixed cage 122 to adjust the gap between neighboring cages 120 according to a user's request; And an interval adjusting unit 130 provided between the fixed cage 122 and the variable cage 124 to provide a feed force to adjust the interval of the variable cage 124 with respect to the fixed cage 122, ; And

Description

A variable type gang form which can be installed according to the external shape of a building to improve safety,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable-type gantry that can be installed in accordance with the external shape of a building to improve safety, and more particularly, Wherein the cage comprises a fixed cage and a variable cage formed at one or both ends of the fixed cage, the fixed cage being spaced apart from the fixed cage by a predetermined distance, Which can be installed in accordance with the external appearance of the building, so as to improve the safety of the installation of the safety cage without requiring a separate stabilizer.

Generally, a gang form is a work platform for constructing an outer wall of a concrete structure having the same cross-sectional shape as an apartment or a building, such as an apartment or a building. The gang form is constructed of an outer wall refuse house, a mold installation, dismantling work, ) It refers to a large formwork which is made by integrally making a cage for work scaffolding.

The cage is a part of the gang form which is composed of a work footrest, a safety guardrail, etc., which is necessary for safely performing operations such as formwork dismantling work, dismantling work, follow-up work, and decorating .

The cage is divided into an upper cage and a lower cage, and the upper cage refers to a portion of the upper two-stage work foot which is used for forming and disassembling of the four-step work foot of the kangform cage. Further, the lower cage refers to a lower two-stage work foot component used for plastering and decorating work.

Such gauze is formed by attaching a plate-shaped forming foam to the side of the cage composed of one or two stages and installing and disassembling the formed foam in a state where the worker can climb on the cage side and the outer wall of each layer of the concrete structure can be constructed, And is capable of proceeding with subsequent work, such as plastering, leeches.

The gauze is sequentially moved by a tower crane so as to enable the construction of the outer wall of the upper layer after the construction of the outer wall of the lower layer of the concrete structure, so as to correspond to the outer wall surface of each layer.

As shown in FIG. 1, the conventional gang-foam is constructed of a gang foam 1 installed opposite to the glu-foam 7 so as to place concrete on the outer wall 8 of the building, And a lower table (6) on which a support table (5) on which the table (2) is placed is formed at regular intervals.

In addition, the work platform safety footrest constructed on the gang form is manufactured by welding the wire net required according to the width and length of the gang form to a pre-fabricated square pipe, and then forming a safety foot by fitting the square pipe.

However, since the conventional gauze is shaped to have a certain width and length, it can be suitably used for a building having a rectangular cross section. However, as shown in Fig. 2, There is a problem that a fall occurs due to carelessness of the operator due to such an interval.

In order to solve the above problem, a separate safety net is installed in the gap between the gangs in the conventional gang-bang to shorten the fall height of the worker, thereby minimizing the worker's injury.

However, even in this case, there is a problem that the worker's fall is not blocked from the source through the gaps between the gang forms, merely by installing a safety net between the gangs to minimize the injury of the worker who falls down.

In addition, there is a problem in that the competitiveness of the product is lowered due to the addition of the installation cost, in which a separate safety net, which is not related to the operation, is added.

Further, in addition to the gang form, a safety net should be additionally provided at intervals between the gangs. In this case, there is a risk of a safety accident such as falling due to carelessness of the operator.

Korean Patent Publication No. 887278 (Bulletin of Feb. 27, 2009) Korean Patent Publication No. 2011-30851 (Published on March 24, 2011) Korean Patent Laid-Open Publication No. 2013-9217 (published on March 23, 2013)

It is an object of the present invention to provide a cage which is formed on the outer periphery of a forming foam and an outer wall of the forming foam so as to enable the outer wall to be formed and to externally work, And a variable cage which is formed at one end or both ends of the fixed cage and whose fixed distance is adjusted at the fixed cage. Thus, the interval between adjacent cages installed on the outer periphery of the building can be adjusted Which can be installed in accordance with the external appearance of a building, so as to improve the safety of installing a safe cage without installing the cage.

In order to accomplish the above object, the present invention provides a cushioning structure for a cushioning cushion, comprising a molded foam and an outer cage installed outside the cushion to form an outer wall and an outer wall formed in a downward direction Wherein the cage comprises a fixed cage having a constant width; A variable cage configured to be spaced apart at a predetermined distance from one end or both ends of the fixed cage so as to adjust the gap between neighboring cages according to a user's request; And a gap adjusting unit formed between the fixed cage and the variable cage to provide a feed force so that the interval of the variable cage can be adjusted based on the fixed cage.

In the present invention, the fixed cage includes a plurality of first vertical bars which are vertically erected at regular intervals, at least one first horizontal bar fixed horizontally at a predetermined interval along the longitudinal direction of the first vertical bars, And a fixed footrest fixed to a lower end of the first vertical bar to support a worker so as to be able to pass therethrough; The variable cage includes at least one second vertical bar vertically erected, a horizontal bar fixed at a predetermined interval along the longitudinal direction of the second vertical bar, and adapted to be inserted into the first horizontal bar at least And a variable footrest fixed to the lower end of the second vertical bar to support the worker so as to be able to pass therethrough.

In the present invention, the gap adjusting portion may include a first housing fixed to one side of the fixed cage and having a spiral formed therein; A second housing having a same line as the first housing and fixed to one side of the variable cage; And a screw shaft coupled to the first housing so as to be moved forward or backward along the rotational direction and coupled to the second housing at the other end so as to move forward or backward without interfering with rotation .

In the present invention, it is preferable that a first stopper is provided at one side of the screw shaft so that the first housing is closely contacted when the screw shaft is advanced and forwarded by the rotational direction so that the advancing length is limited.

According to the present invention, it is preferable that the one end of the screw shaft further includes a head for facilitating the turning operation of the screw shaft through the tool.

According to the present invention, there is provided a cage comprising a molded foam and a cage which is formed on an outer periphery of the molded foam to form an outer wall and to externally work, wherein the cage is formed on one end or both ends of the fixed cage, The variable cage having a fixed spacing in the fixed cage allows the spacing between neighboring cages installed on the outer periphery of the building to be adjusted according to the demand of the user so that a safe cage can be installed without installing a separate stabilizer have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Fig. 2 is a schematic plan view in which a gantry is installed in a general building. Fig.
3 is a schematic perspective view of a gang foam according to the present invention.
Fig. 4 is a schematic sectional side view of a ganged foam according to the present invention. Fig.
5 is a schematic front view of a ganged form according to the present invention.
6 is a schematic plan view of a building according to the present invention in which a ganged foam is installed.
FIG. 7 is a partially exploded perspective view of a cage of a first stage of gang formation according to the present invention; FIG.
8 is a front view of Fig.
9 is a partially enlarged perspective view showing a configuration of a gap adjusting unit according to the present invention.
10 is a plan view of the variable footrest according to FIG. 8 in a stretched state;
11 is a plan view of the variable footrest according to FIG.

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

As shown in FIGS. 3 to 6, the variable mold 10 of the present invention includes a molding foam 110 for supporting an outer wall to be formed at one end by pouring concrete, and a molding foam 110 installed at the other end of the molding foam 110 And a gap adjusting unit 130 formed at one end or both ends of the cage 120. [

The forming foam 110 is a means for forming an outer wall, which is a commonly used technique, and thus a detailed description of the structure and operation effects will be omitted.

The cage 120 is installed on the outer periphery of the molding foam 110 to secure a work space for an operator. In addition, the cage 120 is typically constructed in four stages, with the upper one or two ends forming the working space of the formed foam 110, and the lower and the three ends forming the work of the preformed outer wall It is a workspace to perform.

7 and 8, the cage 120 includes a fixed cage 122 and a fixed cage 122 so that one side is supported by the fixed cage 122 so that the gap can be adjusted by the gap adjusting unit 130, And a variable cage 124 to which the variable cage 124 is controlled.

7 and 8 illustrate one stage of the cage 120 constituting the multi-stage for convenience of description. The cage 120 includes a plurality of stages, as shown in FIGS. 3 to 5, .

The fixed cage 122 is a means for connecting or integrating the multi-stage cages 120.

The fixed cage 122 includes a first vertical bar 1222 vertically installed at each of both ends thereof, at least one fixed first horizontal bar 1224 along the longitudinal direction of the first vertical bar 1222, And a fixed footrest 1226 fixed to the lower end of the first vertical bar 1222.

The first vertical bar 1222 stands at both ends and serves as a pillar for forming a frame. In this case, the first vertical bar 1222 is not limited to being installed at both ends, but may be installed at a predetermined interval along the longitudinal direction of the fixed footboard 1226, Depending on the intensity design that takes into account the strength, the number and shape can be varied.

At least one of the first horizontal bars 1224 may be formed along the longitudinal direction of the first vertical bars 1222, and various numbers and shapes may be formed according to the strength design.

In addition, the first horizontal bar 1224 preferably has a hollow pipe shape. This is configured to support and guide movement when one end of a variable cage 124, described below, is inserted to vary the length. Also, the first horizontal bar 1224 may be formed as one of a rectangular pipe or a circular pipe. Of course, the present invention is not limited thereto, and any structure can be used as long as it can support and guide the movement of the variable cage 124.

The fixed footrest 1226 is formed at the lower end of the first vertical bar 1222 to form a passage for allowing an operator to move for work. In addition, a plurality of reinforcing bars or ribs may be formed on the fixed footboard 1226 so as to be stably fixed to the first vertical bars 1222.

The variable cage 124 is formed at both ends or one end of the fixed cage 122 to vary the length of the fixed cage 122 to freely maintain the spacing between the cages 120 regardless of the planar shape of the building Thereby providing a safe working environment.

The variable cage 124 includes a second vertical bar 1242 erected at one end thereof, a second horizontal bar 1244 fixed at least one along the longitudinal direction of the second vertical bar 1242, And a variable footrest 1246 fixed to the lower end of the vertical bar 1242.

The second vertical bar 1242 stands at one end and serves as a pillar for forming a frame. In this case, the second vertical bars 1242 are not limited to being formed at one end but may be installed at a predetermined interval along the longitudinal direction of the variable footrests 1246, Depending on the intensity design that takes into account the strength, the number and shape can be varied.

At least one of the second horizontal bars 1244 may be formed along the longitudinal direction of the second vertical bars 1242, and may have various numbers and shapes according to the strength design.

The second horizontal bar 1244 is formed in a number corresponding to the first horizontal bar 1224 and is inserted inside or outside the pipe-shaped first horizontal bar 1224. Accordingly, the second horizontal bar 1244 is guided along the longitudinal direction of the first horizontal bar 1224 so that the variable cage 124 is stretched and contracted in the fixed cage 122.

In addition, the second horizontal bar 1244 preferably has a hollow pipe shape. In addition, the second horizontal bar 1244 may be formed as one of a rectangular pipe and a circular pipe. Of course, the present invention is not limited thereto, and any one that can be supported and guided by the first horizontal bar 1224 can be used.

The variable footrest 1246 is formed at the lower end of the second vertical bar 1242 and forms a passage for allowing an operator to move for work. In addition, the variable footrest 1246 may be provided with a plurality of reinforcing bars or ribs to be stably fixed to the second vertical bars 1242.

9, a guide groove 1228 having a predetermined depth is formed inside one end of the fixed footrest 1224, and the variable footrest 1246 is inserted into the guide groove 1228 , And supports the entry / exit of the variable footrest (1246) while being guided by the guide groove (1228). Of course, the present invention is not limited thereto, and the variable footrest 1246 may be mounted on the upper end of the fixed footrest 1226 so that the length of the variable footrest 1246 Any configuration can be used as long as the configuration can be smoothly changed.

The interval adjusting unit 130 is disposed between the fixed and variable cages 122 and 124 to adjust the variable cage 124 so that the variable cage 124 varies in accordance with the user's request .

8 and 9, the gap adjusting unit 130 may be formed between the fixed cage 122 and the variable cage 124 and may include the variable cage 124 on the basis of the fixed cage 122, So that the interval between the adjacent cages 120 is adjusted to meet the user's demand.

The interval adjusting unit 130 includes a first housing 132 fixed to one side of the fixed footstool 1226 and a second foot 132 fixed to one side of the variable footstep 1246 so that the horizontal center of the first housing 132 is aligned. 2 housing 134, and a screw shaft 136 configured between the first housing 132 and the second housing 134. [

The first housing 132 is fixed to one side of the fixed foot 1226 and is screwed with the screw shaft 136 so that the screw shaft 136 is moved in the longitudinal direction So as to be moved by a predetermined length.

A first stopper 134 fixed to the screw shaft 136 and controlling the extension length of the screw shaft 136 moved along the longitudinal direction through the first housing 132, (133).

The first stopper 133 is fixed to one side of the screw shaft 136 so that the extension length of the screw shaft 136 is interrupted. In this case, the first stopper 133 may be a stop ring or a nut fastened to the screw shaft 136, but is not limited thereto, and may be fixed to one side of the screw shaft 136, Any means that can shorten the elongation length of the shaft 136 can be used.

The second housing 134 is fixed to one side of the variable footrest 1246 and moves together with the screw shaft 136 which moves in the rotating direction of the screw shaft 136 to fix the variable footrest 1246 Is a means for varying a predetermined length based on the foot plate 1226.

The second housing 134 is configured on one side of the screw shaft 136 and is configured to move with the screw shaft 136 moving along the length direction without interference with the rotation of the screw shaft 136 do.

The second housing 134 is fixed to the screw shaft 136 at one end of the second housing 134 so as to control the short shaft length of the screw shaft 136 moved in the longitudinal direction through the second housing 134 Two stoppers 135 are formed.

The second stopper 135 is fixed to one side of the screw shaft 136 so that the minor axis length of the screw shaft 136 is interrupted. In this case, the second stopper 135 may be a stop ring or a nut fastened to the screw shaft 136, but is not limited thereto, and may be fixed to one side of the screw shaft 136, Any means that can shorten the short axis length of the shaft 136 can be used.

The screw shaft 136 is disposed between the first and second housings 132 and 134 so that the variable footrest 1246 to which the second housing 134 is fixed along the abducting direction is fixed to the fixed footrest 1226, As a reference.

One end of the screw shaft 136 includes a head 137 for allowing the screw shaft 136 to be easily rotated through an operator.

The head portion 137 is formed in a square shape so that the screw shaft 136 can be easily rotated. In this case, the head portion 137 is hexagonal. Of course, the present invention is not limited thereto, and any shape can be used as long as it can be easily rotated by the operator through the head portion 137. At this time, the head portion 137 can be provided with rotational force by using an electric type such as a manual drill using a tool such as a spanner or a portable drill or the like.

Hereinafter, the operation of the variable gauges, which can be installed according to the external appearance of the building, will be described in order to improve the safety as described above.

First, as shown in Fig. 6, a plurality of gauzes 10 are installed on the plane of the building. 6, if one of the edges of the cage 120 does not coincide with the edge of the irregularly shaped building, the one end of the cage 120 is extended or shortened to be aligned with the edge of the irregularly shaped building.

This is accomplished by moving the variable cage 124 from the fixed cage 122 through the gap adjusting unit 130, as shown in FIGS.

For example, as shown in FIG. 10, when the variable cage 124 is desired to be stretched in the fixed cage 122 by a predetermined length, the screw shaft 136 of the gap adjusting unit 130 is rotated forward.

This causes the screw shaft 136 to rotate through an electric tool such as a manual or electric drill such as a spanner on the head 137 fixed to one end of the screw shaft 136. [

The threaded shaft 136 is advanced along the spiral direction of the first housing 1222 fixed to one side of the fixed cage 122, that is, the fixed foot 1226, by the forward rotation of the screw shaft 136. [

At this time, the second housing 134 supported at the end of the screw shaft 136 is also advanced, and the variable footrest 1246 to which the second housing 134 is fixed is advanced.

The second horizontal bar 1244 fixed at a predetermined interval along the longitudinal direction of the second vertical bar 1242 whose one end is fixed to the variable footrest 1246 is guided by the first horizontal bar 1224, By moving forward with the variable footrest 1246, the variable cage 124 is spaced apart from the fixed cage 122 by a predetermined distance.

In this case, the screw shaft 136 is advanced by a length corresponding to the first stopper 133 fixed to one side of the screw shaft 136, which is in close contact with one end of the first housing 132.

On the other hand, when it is desired to narrow the gap between the fixed cage 122 and the variable cage 124, it may be operated in the reverse order of the above-described operation state.

That is, when the tool is inserted into the head 137 of the screw shaft 136 and then rotated in the opposite direction, the screw shaft 136 is moved backward while being guided by the first housing 132.

Thus, the second housing 134 formed at one end of the screw shaft 136 is moved backward, whereby the fixed footrest 1246, that is, the variable cage 124 to which the second housing 134 is fixed is moved backward .

Therefore, by simply adjusting the distance between the cages 120 of the gang form 10 according to the shape of the flat surface of the building, it is possible to install the secure cage 120 without installing a separate safety net.

The above description is merely an example for implementing a variable type of gantry that can be installed in accordance with the external shape of a building so as to improve safety, and the present invention is not limited to the above embodiment. It will be understood by those skilled in the art that various changes may be made without departing from the spirit of the invention.

10: gum 110: molding foam
120: Cage 122: Fixed cage
1222: first vertical bar 1224: first horizontal bar
1226: fixed footrest 124: variable cage
1242: second vertical bar 1244: second horizontal bar
1246: variable stool 130: short adjustment part
132: first housing 133: first stopper
134: second housing 135: second stopper
136: screw shaft 137: head

Claims (5)

A gantry comprising a molded foam and a cage installed outside the molded foam so as to be able to perform an outer wall forming process and an outer wall forming process of the outer wall formed on the outside of the building,
The cage 120 includes a fixed cage 122 having a constant width;
A variable cage 124 configured to be spaced at a predetermined distance from one end or both ends of the fixed cage 122 to adjust the gap between neighboring cages 120 according to a user's request; And
An interval adjusting unit 130 provided between the fixed cage 122 and the variable cage 124 to provide a feed force to adjust the interval of the variable cage 124 based on the fixed cage 122;
The variable gangue can be installed according to the external shape of the building to improve the safety.
The method according to claim 1,
The fixed cage 122 includes a plurality of first vertical bars 1222 vertically installed at regular intervals and at least one vertical bar 1222 fixed at a predetermined interval along the longitudinal direction of the first vertical bars 1222 And a fixing foot 1226 fixed to the lower end of the first vertical bar 1222 and supporting the first vertical bar 1224 so as to enable the operator to pass therethrough;
The variable cage 124 includes at least one second vertical bar 1242 vertically installed and a horizontal bar 1242 fixed at a predetermined interval along the longitudinal direction of the second vertical bar 1242, At least one second horizontal bar 1244 corresponding to be inserted to the inside of the second vertical bar 1224 and a variable footrest 1246 fixed to the lower end of the second vertical bar 1242 to support the worker to pass therethrough, ;
The variable gangue can be installed according to the external shape of the building to improve the safety.
The apparatus according to claim 1 or 2, wherein the gap adjusting unit (130)
A first housing 132 fixed to one side of the fixed cage 122 and having a spiral formed therein;
A second housing 134 which is collinear with the first housing 132 and is fixed to one side of the variable cage 124; And
A screw shaft 136 that is coupled to the first housing 132 so as to move forward or backward along the rotation direction and to be coupled with the second housing 134 at the other end so as not to interfere with the rotation, );
The variable gangue can be installed according to the external shape of the building to improve the safety.
4. The spindle motor according to claim 3, wherein, on one side of the screw shaft (136)
A first stopper 133 for allowing the first housing 132 to be in close contact with the screw shaft 136 when the screw shaft 136 is advanced and forwarded by the rotation direction so that the advancing length is limited;
And further comprising: an adjustable gantry that can be installed according to the external shape of the building to improve safety.
4. The spindle motor according to claim 3, wherein one end of the screw shaft (136)
A head portion 137 for facilitating the turning operation of the screw shaft 136 through a tool;
And further comprising: an adjustable gantry that can be installed according to the external shape of the building to improve safety.
KR1020150070414A 2015-05-20 2015-05-20 A variable type gang form KR101684678B1 (en)

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KR102271398B1 (en) 2020-12-24 2021-06-30 명인엔지니어링 주식회사 An improved gang form

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0626190A (en) * 1992-07-09 1994-02-01 Ohbayashi Corp Gondola device for operation
JPH08232466A (en) * 1995-02-24 1996-09-10 Daifuku Koei Kk Working scaffolding device
JP2001295473A (en) * 2000-04-18 2001-10-26 Taisei Corp Steel skeleton erection span adjusting method
KR100887278B1 (en) 2008-09-23 2009-03-06 (주)한터사람들 Extending gondola
KR20110030851A (en) 2009-09-18 2011-03-24 (주) 에스에프 Assembling type safety step of gang foam
KR20110039942A (en) * 2009-10-13 2011-04-20 현대알루미늄(주) Support structure for lower scaffold in building construction
KR20130009217A (en) 2011-07-14 2013-01-23 주식회사 근하기공 Winch and rail climbing system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0626190A (en) * 1992-07-09 1994-02-01 Ohbayashi Corp Gondola device for operation
JPH08232466A (en) * 1995-02-24 1996-09-10 Daifuku Koei Kk Working scaffolding device
JP2001295473A (en) * 2000-04-18 2001-10-26 Taisei Corp Steel skeleton erection span adjusting method
KR100887278B1 (en) 2008-09-23 2009-03-06 (주)한터사람들 Extending gondola
KR20110030851A (en) 2009-09-18 2011-03-24 (주) 에스에프 Assembling type safety step of gang foam
KR20110039942A (en) * 2009-10-13 2011-04-20 현대알루미늄(주) Support structure for lower scaffold in building construction
KR20130009217A (en) 2011-07-14 2013-01-23 주식회사 근하기공 Winch and rail climbing system

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