KR20180111720A - Expandable bucket safety handrail structure mounted on aerial work vehicles - Google Patents

Expandable bucket safety handrail structure mounted on aerial work vehicles Download PDF

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Publication number
KR20180111720A
KR20180111720A KR1020180111791A KR20180111791A KR20180111720A KR 20180111720 A KR20180111720 A KR 20180111720A KR 1020180111791 A KR1020180111791 A KR 1020180111791A KR 20180111791 A KR20180111791 A KR 20180111791A KR 20180111720 A KR20180111720 A KR 20180111720A
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KR
South Korea
Prior art keywords
guide member
rail
railing
bottom plate
safety
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Application number
KR1020180111791A
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Korean (ko)
Inventor
송복석
Original Assignee
송복석
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Filing date
Publication date
Application filed by 송복석 filed Critical 송복석
Priority to KR1020180111791A priority Critical patent/KR20180111720A/en
Publication of KR20180111720A publication Critical patent/KR20180111720A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/14—Railings
    • E04G5/142—Railings extensible or telescopic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F2700/00—Lifting apparatus
    • B66F2700/09—Other lifting devices

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Emergency Lowering Means (AREA)

Abstract

The present invention relates to an expandable bucket safety handrail structure mounted on an aerial work vehicle. The bucket, which has a form connecting front and rear and left and right boundaries of an aerial work board, installed in an end part of a boom forming an aerial work device to allow a worker to board on to prevent falling of the worker and changing a size of a work space where the worker is positioned while the bucket is not separated, thereby enabling changing of a position of a safety handrail.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expandable bucket safety railrail structure,

The present invention relates to a safety guardrail structure of a high work bench, and more particularly, to a safety guardrail structure of a high work bench, which comprises a bucket on an end of a boom constituting a high work bench, The present invention relates to an extension type bucket safety guardrail structure for a high altitude work vehicle capable of changing the size of a work space where an operator is located and changing the position of a safety guardrail while preventing an operator from falling down.

In order to work at a height that can not be climbed up through a normal ladder, from the walls of high-rise buildings and structures, glass work, signboard work to lifting work of cargoes, The elevation work equipment equipped with the boom zone where the platform is formed is utilized and the equipment in the form of a high-altitude operation car with mobility is used.

The height of the elevating table includes a rectangular bottom plate having a predetermined size, a rear rail disposed upright at a predetermined height from the rear end of the bottom plate, a left rail secured to both the right and left sides of the bottom rail and the rear rail, And a front rail at a predetermined height hinged to be rotatable in the front-rear direction on the front end of the bottom plate.

In the conventional elevated workbench, the left and right hand rails are usually fixed to the bottom and rear rails. As the work space is limited, the working range at the high position is limited. When the size is large, it is difficult to accommodate it or the work space is largely reduced, so that the work efficiency is largely deteriorated due to frequent movement of the work station.

In this case, the elevator workbench which can extend the working space by laying down the left and right handrails and the rear handrails at the same height as the bottom board has been developed. In this case, since the safety railing is eliminated, The addition of a balustrade structure is required.

This additional railing structure increases the weight of the elevation workbench as well as it can be removed and opened according to the need, so that it can be used without being mounted in the state of being removed during the operation of a high-altitude work vehicle, or being opened or closed due to various inconveniences during work. There is still a great possibility that a falling accident occurs during use due to an incomplete combination.

Particularly, there is a high possibility that a safety accident occurs during the process of lifting a heavy material such as attaching a glass to a wall of a building or attaching a marble, and when a load is loaded on the board, the work table is shaken away from the structure As the unstable condition occurs, the incomplete rail structure due to the extension of the work shelf may lead to a serious accident, and there is a demand for a safety rail with a more stable and robust structure.

Registration Practical Utility Model No. 20-0315891 (May 29, 2003)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to prevent a worker from falling forward, backward and leftward and rightward of a work bench on which a worker is boarded, The present invention provides a bucket safety railing structure with an elevated work vehicle mounted thereon, which can significantly improve work efficiency and safety because the size of the work space where the safety rails are located can be changed.

In accordance with another aspect of the present invention, there is provided a safety guardrail structure for a high altitude work platform, comprising: a bottom plate having a boom connected to a lower portion thereof; A rear rail having a predetermined height at a rear end of the bottom plate, the rear rail having a first guide member formed in a lateral direction; A pair of first moving members which are slidably engaged with the first guide member to adjust lengths of the engaging portions and respectively engage with the left and right sides of the first guide member, A pair of side support rails provided at the ends and having a second guide member formed in the front and rear direction and having a predetermined height; A pair of second moving members which are slidably engaged with the second guide members at both ends and whose lengths are adjusted, and the length of the second moving members is adjusted by a sliding method across the pair of second moving members. A front auxiliary rail having a length adjustable member and having a predetermined height; And a control unit.

A front railing hinged to the front end of the bottom plate so as to be rotatable vertically upward from a horizontal direction; A left parapet hingedly coupled to the left end of the bottom plate so as to be vertically upwardly pivotable from a horizontal direction and having a left extension extending protruding from the front end to a length corresponding to the height of the front rail; A right parapet hingedly coupled to the right end of the bottom plate so as to be vertically upwardly pivotable from a horizontal direction and having a right extending portion protruding from the front end to a length corresponding to the height of the front rail; As shown in Fig.

The first guide member and the second guide member may be in the form of pipes or pipes, and the first moving member and the second moving member may include a pipe inserted into the first guide member and the second guide member, Shaped steel.

Further, the front side railing and the lower side of the left and right side side railing are in contact with the inner side surfaces of the front rail, the left side rail and the right side rail, respectively, and a stopper for restricting the extended range is provided. It is preferable that the shifting member and the length adjusting member are provided with locking means to maintain the predetermined length.

According to the present invention, it is possible to effectively prevent a worker from falling down by installing safety rails which are not detached at the time of high-altitude work, and by changing the length and position of the railing by enlarging the size of the work table, .

1 is a first perspective view showing a folding structure of a high work bench according to the present invention,
FIG. 2 is a first perspective view showing an extension of a high work bench according to the present invention,
3 is a second perspective view showing an extension of a high work bench according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, a structure of an expandable bucket safety guardrail structure mounted on a high-performance working vehicle will be described in detail.

FIG. 1 is a first perspective view showing a folding structure of a high work bench according to the present invention, FIG. 2 is a first perspective view showing an extension of a high work bench according to the present invention, and FIG. 3 is an enlarged view of a high work bench according to the present invention 2 is a perspective view showing an example of a high work bench to which the present invention is applied.

The height of the elevating table is basically provided with a bottom plate 110 for an operator to load the cargo on the upper side and a load boom is connected to the bottom of the bottom plate 110, Respectively.

The bottom plate 110 is connected to various types of frames for reinforcing the load together with a rectangular aluminum plate and includes a front rail 130, a rear rail 120, a left rail 140, And the right hand rail 150 are formed so as to prevent an operator from falling down during a high-altitude operation.

Specifically, a rear rail 120 is installed at a rear end of the bottom plate 110 to have a predetermined height. The predetermined height is a minimum height that can prevent an operator from falling down, and is usually set to a height of 1 to 1.2 meters. The rear rail 120 may be connected to the bottom plate 110 so as to be connected to the bottom plate 110 so as to stand vertically upward from the bottom plate 110 in the same horizontal state as the bottom plate 110. However, (Not shown).

The rear railing 120 may be made of a plate material, but it may be manufactured in such a manner that one or more longitudinal and transverse frames are installed on the inner side of the frame for structural reinforcement and weight reduction. In the lower side, A perforated plate, a mesh plate, or the like can be provided.

The front parapets 130, the left parapets 140 and the right parapets 150 are unfolded outwardly and used as a work footing to expand the working space.

That is, the front rail 130 is hinged to the front end of the bottom plate 110 so as to be rotatable vertically upward from the horizontal direction. In other words, the front rail 130 can be extended in the horizontal direction to extend the working space extending to the bottom plate 110 while standing upright in the vertical direction. At this time, the front rail 130 is constructed to have a proper height to prevent fall in a state of standing vertically upward, and is generally made to have a relatively lower height than the rear rail 120.

Left hand rails 140 and right hand rails 150 are provided on the left and right ends of the bottom plate 110, respectively. Specifically, the left handrail 140 is hinged to the left end of the bottom plate 110 so as to be vertically upwardly pivotable from the horizontal direction, and the left handrail 140 is hinged to the left end of the left handrail 140 so as to protrude to a length corresponding to the height of the front handrail 130 And the extension portion 141 is provided.

Similarly, the right handrail 150 is also hinged to the right end of the bottom plate 110 so as to be vertically upwardly pivotable from the horizontal direction, and a right extension (not shown) (Not shown).

The left extension 141 and the right extension 151 are hinged to the left handrail 140 and the right handrail 150 such that the left handrail 140 is hinged to the front handrail 130, The left handrail 140 and the right handrail 150 can be folded in a state that they are vertically upwardly pivoted to the left hand 110 and pivoted to the outside respectively.

This is a structure for enhancing safety by securing a working space in a rectangular state by filling the left and right front corner portions when the front railing 130, the left hand rail 140 and the right hand rail 150 are extended and the working space is expanded. The extension 141 and the right extension 151 are hinged to the left and right sides of the front handrail 130 and not to the left handrail 140 and the right handrail 150, Can be implemented.

As the left parapet 140 and the right parapet 150 are unfolded, spaces are formed in the rear part of the parapet corresponding to the height of the left parapet 140 and the right parapet 150, A rear extension part 121 formed to have a length corresponding to the height of the handrail 140 and the right handrail 150 is provided.

Similarly, when the left and right handrails 140 and 150 are raised, the rear extension part 121 is folded back to the rear side of the handrails 120, and the left handrails 140 and the right handrails 150 150 are laid down, the rearward expanding portion 121 is spread and fixed to the front, so that it is possible to prevent a fall and an accident from falling to the rear side.

A fixing means for preventing the rear rail 120, the left rail 140 and the right rail 150 from being temporarily fixed in a state where the rear rail 120 and the right rail 150 are erected and preventing the rear rail 121 from being unintentionally laid, 141 and the right extension 151 must be fixed to the rear handrail 120, the left handrail 140 and the right handrail 150 in a superposed state.

The fastening means can be realized through various well-known fastening means such as a fastening means, a through-hole passing through a mutually overlapping portion, and a pin inserted, so that detailed description will be omitted in order to prevent the gist of the present invention from being blurred.

As described above, since the front rail 130, the left hand rail 140, and the right hand rail 150 are extended outward to utilize the floor plate 110 as an extended pedestal, the work space can be expanded. However, In this case, the risk of collision with workers and cargo is high.

Therefore, it is inevitable to provide a separate detachable or folding-type balustrade structure, and there is a risk due to carelessness during operation, uninstallation of a separate balustrade structure, and unstable installation.

As a result, there is a demand for safety railing in a state that it is not detached from an industrial safety management institution. In accordance with the present invention, a secondary railing, which is a main feature structure, is installed in a high work platform.

Such an auxiliary rail structure may be added to a conventional high work table, or may be newly manufactured by providing auxiliary rails on a bottom plate.

A first guide member 121 is formed on the bottom plate 110 or the rear rail 120 in a lateral direction. In the accompanying drawings, the first guide member 121 is a bar or a tubular structure that is integrated with the rear railing 120 and transversely transversely guides the left and right movement of the laterally-assisted railing 160 described later. Of course, the first guide member 121 may be formed on the bottom plate 110, but it may be attached to the rear rail 120 because it may cause inconvenience to the operator.

The side auxiliary rails 160 are provided on the left and right sides of the bottom plate 110 and are provided with a pair of substantially symmetrical structures. For the sake of explanation, the side auxiliary rails 160 and the right side auxiliary Railings (160 ').

In addition, since the left side auxiliary parapet 160 and the right side auxiliary parapet 160 'are provided symmetrically and have substantially the same structure, the left side auxiliary parapet 160 will be described with reference to the left side auxiliary parapet 160.

The side supporting railing 160 includes a first moving member 161 which is slidably engaged with the first guide member 121 and whose length is adjusted.

At this time, the left side auxiliary railing 160 is coupled to the left side of the first guide member 121 and the right side side auxiliary railing 160 'is coupled to the right side of the first guide member 121 to move left and right .

A second guide member 162 is formed at the outer end of the first moving member 161 so as to extend in the forward and backward directions to guide the forward and backward movement of the front auxiliary rail 170 to be described later. The frame of the side auxiliary parapet 160 is made to have the same height as the rear parapet 120 or a similar height of about 1 meter.

In addition, the rear end of the side-ancillary parapets 160 may be configured to be close to or in contact with the rear railing 120 in a standing state, thereby blocking the rear side and the left and right sides of the predetermined period.

 The front auxiliary rail 170 is provided with a second moving member 171 which is slidable in forward and backward directions while being coupled to the second guide member 162 at both ends thereof and whose length is adjusted, And a length adjusting member 173 which crosses between the pair of second moving members 171 and can adjust the length of the sliding member in a forward direction.

In this case, the second guide member 162 and the second moving member 171 are provided to have a plurality of rails, and the front auxiliary rails 170 are also provided so as to prevent the operator from falling. The lateral auxiliary rail 160 and the front auxiliary rail 170 are formed to have a vertical and a horizontal frame at the inner side of the square frame to provide structural reinforcement and weight reduction. One or more of which may be installed, and on the lower side, a perforated plate or mesh plate capable of preventing the falling of objects such as tools may be installed.

Various structures can be applied in the sliding movement of the first moving member 161 along the first guide member 121 and the second moving member 171 along the second guide member 162 In the embodiment of the present invention, the first guide member 121 and the second guide member 162 are formed in the form of pipes or pipes, and correspondingly, the first moving member 161 and the second moving member 171 The first guide member 121 and the second guide member 162 may be inserted into a pipe or a pipe.

Likewise, the length adjusting member 173 may be composed of two or more pipes or pipes, but may be configured to be inserted into another member to be adjusted in length.

The first moving member 161 and the second moving member 171 may be formed in a shape of a shape that wraps the outside of the first guide member 121 and the second guide member 162, And the second guide member 162 are circular, a C-shaped steel is used, and when the cross section is a quadrangle, 'C' shaped steel is used to slide and adjust the length.

At this time, when the size and weight of the front auxiliary rail 170 and the side auxiliary rail 160 are large, the first guide member 121 and the first moving member 161, the second guide member 162, The adjustment of the length may be difficult due to the generation of frictional force between the member 171 and the length adjusting member 173, so that smooth length adjustment can be achieved by adding an element capable of reducing friction such as a roller or a bearing.

When the second moving member 171 completely contacts the bottom plate 110 or the left parapet 140 or the right parapet 150 in the unfolded state, the resistance increases due to friction, So that the contact area can be reduced.

In the present invention, when the size of the front auxiliary parapet 170 and the side auxiliary parapet 160 is reduced to a minimum, the left parapet 140 and the right parapet 150 are located within the range of the bottom plate 110, The left handrail 140 and the right handrail 150 and the front handrail 130 may be enlarged from the expanded state to the outer edge portion when the maximum length is extended, Can be realized.

To this end, the front side railing (170) and the lower side of the left and right side side railing (160) are in contact with the inner sides of the front railing (130), the left side railing (140) and the right side railing And a stopper S for restricting movement of the stopper. At this time, as described above, since the protruding structure is located below the second moving member 171, the stopper can be configured to limit the extended range by being in contact with the protruding structure 172.

The second guide member 162 and the second moving member 171 are disposed to block the unintentional movement in adjusting the length and position of the front rail 130, the left rail 140 and the right rail 150. [ And the length adjusting member 173 is required to be formed with a locking means 190 so as to maintain a predetermined length.

A through hole H which simultaneously passes through the mutually contacted members in the second guide member 162 and the second moving member 171 and the length adjusting member 173 in which the plurality of members are fitted and joined together, And a fixing pin P that passes through the through holes of the two members that meet according to the adjusted length may be inserted. In addition, the front rail 130 may be formed by various known fixing means, And the left and right hand railing 140 and the right hand railing 150, respectively.

With such a structure, the safety railing which is not detached can be provided at all times, so that it is possible to prevent safety such as falling and falling effectively. At this time, since the work space is blocked by the railing, it is necessary to cross the railing when the worker goes in and out.

In the construction of the door part, when the door is partially opened or closed by a hinge method or a lateral sliding method, the door is opened inadvertently when the door is formed, It is preferable to apply a method capable of forming an entrance in a state in which the door is maintained.

To this end, a pair of longitudinal vertical frames having vertical directions at selected positions such as the rear rail 120, the side auxiliary rail 160, the front auxiliary rail 170, A horizontal frame horizontally extending transversely to the vertical frame is installed, and the horizontal frame is vertically slidable from a central portion of the vertical frame to an upper end thereof.

That is, the vertical frame is constituted by a pipe or a pipe, and a support structure for vertically moving the vertical frame is installed at both ends of the horizontal frame, and a movement range at the lower end and the upper end of the horizontal frame is proposed Or formed through a frame formed laterally.

Accordingly, the horizontal frame is lowered due to its own weight, thereby blocking the doorway at all times. If necessary, the operator can raise and lower the door so that the worker can move to the position of the bottom plate 110, so that the safety rail can be maintained at all times.

In the embodiment of the present invention as shown in the accompanying drawings, a conventional elevating table having a rear railing 120, a front railing 130, a left railing 140 and a right railing 150 on a bottom plate 110 The present invention is not limited to the embodiment in which the front side railing 130 and the right side railing 150 are used as the new model and the front side railing 170 and the side side railing 160 are added as the new models. It is noted that it is also possible to manufacture a high workbench in such a manner that only the front auxiliary parapets 170 and the side auxiliary parapets 060 are provided in the form of only the rear parapets 120. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention. The scope of the invention should, therefore, be construed in light of the claims set forth to cover all such variations.

110: bottom plate 120: rear rail
121: first guide member 130: front rail
140: left handrail 141: left extension part
150: right hand rail 151: right extension part
160: lateral auxiliary rail 161: first movable member
162: second guide member 170: front auxiliary rail
171: second moving member 173: length adjusting member
190: Locking means H: Through hole
P: Fixing pin S: Stopper

Claims (4)

In the elevated work bench safety guardrail structure,
A bottom plate 110 to which a boom for height adjustment is connected at the bottom;
A rear rail 120 having a predetermined height at a rear end of the bottom plate 110 and having a first guide member 121 formed in a lateral direction;
A pair of first moving members 161 that are slidably engaged with the first guide members 121 to adjust lengths of the engaging portions and respectively engage the left and right sides of the first guide members 121, A pair of side support rails 160 having a predetermined height and having second guide members 162 formed at the outer ends of the pair of first moving members 161 and formed in the forward and backward directions;
A pair of second moving members 171 are provided at both ends of the second moving member 171 so as to be slidably engaged with the second guide member 162 and the length of the connecting portion is adjusted. A front auxiliary rail (170) having a predetermined height and provided with a length adjustable member (173) which is adjustable in a sliding manner in a sliding manner; Wherein the buckle safety railing structure comprises:
The method according to claim 1,
A front rail (130) hinged to the front end of the bottom plate (110) so as to be pivotable vertically upward from the horizontal direction;
A left extension 141 formed at a left end of the bottom plate 110 so as to be pivotable vertically upward from a horizontal direction and protruding at a length corresponding to the height of the front rail 130 at a front end, A handrail 140;
And a right extension 151 formed at a right end of the bottom plate 110 so as to be pivotable vertically upward from a horizontal direction and protruding in a length corresponding to the height of the front rail 130 at a front end, A handrail 150; Wherein the buckle safety railcarry structure further comprises:
The method according to claim 1,
The first guide member 121 and the second guide member 162 are formed in the shape of pipes or pipes,
The first moving member 161 and the second moving member 171 are each formed of a pipe inserted into the first guide member 121 and the second guide member 162 or a shape steel enveloping the outside of the first guide member 121 and the second guide member 162 Scaffolding work vehicle with expandable bucket safety railing structure.
3. The method of claim 2,
The front side rails 170 and the lower side of the left and right side auxiliary rails 160 are in contact with the inner side surfaces of the front railing 130, the left side railing 140 and the right side railing 150, A stopper S is provided,
Characterized in that the second guide member (162), the second shifting member (171), and the length adjusting member (173) are provided with locking means (190) Safety railings.
KR1020180111791A 2018-09-18 2018-09-18 Expandable bucket safety handrail structure mounted on aerial work vehicles KR20180111720A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110920829A (en) * 2019-10-30 2020-03-27 沪东中华造船(集团)有限公司 Adjustable side support protective railing
KR20200063391A (en) * 2018-11-27 2020-06-05 주식회사 호룡 Boarding box of high place works car
KR20200066425A (en) * 2018-11-30 2020-06-10 송복석 Expandable bucket safety handrail structure with foldable structure
WO2021029494A1 (en) * 2019-08-12 2021-02-18 1680스카이(주) Slide-type extensible mobile elevated work lift box
KR102230963B1 (en) * 2019-09-25 2021-03-23 주식회사 호룡 Variable Type boarding box of high place works car
KR102408771B1 (en) * 2021-12-06 2022-06-15 양재섭 Multifunctional high place operation car
WO2023178159A1 (en) * 2022-03-17 2023-09-21 Nabors Drilling Technologies Usa, Inc. Crown deck lighting system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200063391A (en) * 2018-11-27 2020-06-05 주식회사 호룡 Boarding box of high place works car
KR20200066425A (en) * 2018-11-30 2020-06-10 송복석 Expandable bucket safety handrail structure with foldable structure
WO2021029494A1 (en) * 2019-08-12 2021-02-18 1680스카이(주) Slide-type extensible mobile elevated work lift box
KR20210019339A (en) * 2019-08-12 2021-02-22 1680스카이(주) Slide type riding basket of mobile elevated work platform
KR102230963B1 (en) * 2019-09-25 2021-03-23 주식회사 호룡 Variable Type boarding box of high place works car
CN110920829A (en) * 2019-10-30 2020-03-27 沪东中华造船(集团)有限公司 Adjustable side support protective railing
KR102408771B1 (en) * 2021-12-06 2022-06-15 양재섭 Multifunctional high place operation car
WO2023178159A1 (en) * 2022-03-17 2023-09-21 Nabors Drilling Technologies Usa, Inc. Crown deck lighting system

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