CN112343322A - Building construction operation platform - Google Patents

Building construction operation platform Download PDF

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Publication number
CN112343322A
CN112343322A CN202010232689.6A CN202010232689A CN112343322A CN 112343322 A CN112343322 A CN 112343322A CN 202010232689 A CN202010232689 A CN 202010232689A CN 112343322 A CN112343322 A CN 112343322A
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CN
China
Prior art keywords
plate
gear
limiting
threaded rod
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010232689.6A
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Chinese (zh)
Inventor
赖秋明
赖志红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lianjiang Mingjie Information Technology Co ltd
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Lianjiang Mingjie Information Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lianjiang Mingjie Information Technology Co ltd filed Critical Lianjiang Mingjie Information Technology Co ltd
Priority to CN202010232689.6A priority Critical patent/CN112343322A/en
Publication of CN112343322A publication Critical patent/CN112343322A/en
Pending legal-status Critical Current

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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
    • E04G1/00Scaffolds primarily resting on the ground
    • E04G1/24Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
    • 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
    • E04G1/00Scaffolds primarily resting on the ground
    • E04G1/18Scaffolds primarily resting on the ground adjustable in height
    • E04G1/20Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00Structural combinations of lighting devices with other articles, not otherwise provided for
    • 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
    • E04G1/00Scaffolds primarily resting on the ground
    • E04G1/24Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
    • E04G2001/242Scaffolds movable on wheels or tracks

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

The invention discloses a building construction operation platform which comprises a base, wherein wheels are rotatably connected to two sides of the bottom of the base, a motor is bolted to the top of the base, an output shaft of the motor is clamped with a first gear, and a second gear is meshed to the left side of the first gear. According to the invention, through the arrangement of the base, the wheels, the motor, the first gear, the second gear, the threaded rod, the limiting structure, the nut, the supporting plate, the limiting sleeve, the limiting rod, the protective guard, the bearing plate, the buffer structure and the supporting structure, the building construction operating platform has the advantages of being capable of adjusting the height, having a protection function, being convenient to move and fix, being convenient for workers to carry out construction operation on high buildings, effectively protecting the workers, improving the mobility of the building construction operating platform, and simultaneously solving the problems that the existing building construction operating platform cannot adjust the height, does not have the protection function and is inconvenient to move and fix.

Description

Building construction operation platform
Technical Field
The invention relates to the technical field of building construction, in particular to a building construction operation platform.
Background
The building construction refers to the production activity in the engineering construction implementation stage, is the construction process of various buildings, also can be said to be the process of changing various lines on the design drawing into real objects in the appointed place, it includes foundation engineering construction, major structure construction, roofing engineering construction, decoration engineering construction, etc., the place of construction operation is called the construction site or construction site, also called building site, the building is people using earth, bricks, tiles, stones and woods; the space for people to live and use is formed by building materials (such as reinforced concrete and section bars) and the like, such as houses, bridges, factory buildings, gymnasiums, cave openings, water towers, temples and the like, in a broad sense, landscapes and gardens are also part of buildings, in a broad sense, nests which are intentionally built by animals can be calculated as buildings, in the building construction, the safety is the first place, the scale development is pursued in the building industry, the safety management work is neglected, and safety accidents happen.
Along with the development of society, people have urgent needs for improving living environment, and as the foundation facilities are continuously improved, the foundation building is built, the building industry becomes hot industry once, in the process of building construction, a building construction operation platform is needed, which is convenient for workers to carry out construction operation, the existing building construction operation platform has simple structure, can not adjust the height of the platform, leads workers to be incapable of constructing buildings, reduces the working efficiency of the workers, has no protection function, and can not be used for building construction, the falling object can fall down and hurt workers, and the existing building construction operation platform is inconvenient to move and fix and lacks maneuverability.
Disclosure of Invention
The invention aims to provide a building construction operation platform which has the advantages of being capable of adjusting height, having a protection function and being convenient to move and fix, and solves the problems that the existing building construction operation platform cannot adjust the height, does not have the protection function and is inconvenient to move and fix.
In order to achieve the purpose, the invention provides the following technical scheme: a building construction operation platform comprises a base, wherein wheels are rotatably connected to two sides of the bottom of the base, a motor is bolted to the top of the base, a first gear is connected to an output shaft of the motor in a clamping manner, a second gear is meshed to the left side of the first gear, a threaded rod is connected to the inner clamping of the second gear in a clamping manner, the bottom of the threaded rod is rotatably connected with the inner part of the base, a limiting structure is arranged on the left side of the second gear, a nut is connected to the surface of the threaded rod in a threaded manner, a supporting plate is welded to the surface of the nut, limiting sleeves are welded to two sides of the bottom of the supporting plate respectively, a limiting rod is slidably connected to the inner part of each limiting sleeve, the bottom of each limiting rod is welded to the top of the base, a protective guard is welded to the top of the supporting plate, the top, the bearing plate is characterized in that buffer structures are arranged on two sides of the bottom of the bearing plate, supporting structures are arranged on two sides of the base, and a protective door is hinged to the front face of the protective guard.
Preferably, limit structure includes the riser, the right side bolt of riser has connected first hydraulic stem, the right side bolt of first hydraulic stem has connected spacing frame, the inside fixed mounting of spacing frame has spacing tooth, spacing tooth can mesh with the surface of second gear.
Preferably, the buffer structure comprises a fixed sleeve, the surface of the fixed sleeve is welded with the side face of the guard rail, a sliding rod is connected to the inside of the fixed sleeve in a sliding manner, the top of the sliding rod is welded with the bottom of the bearing plate, and a spring is sleeved on the surface of the sliding rod.
Preferably, the top of the spring is bolted to the bottom of the bearing plate and the bottom of the spring is bolted to the top of the retainer sleeve.
Preferably, the bottom of the sliding rod extends to the lower part of the fixed sleeve, a limiting plate is welded on the surface of the sliding rod, and the top of the limiting plate is in contact with the bottom of the fixed sleeve.
Preferably, the supporting structure comprises a transverse plate, a second hydraulic rod is bolted to the bottom of the transverse plate, and a fixed seat is bolted to the bottom of the second hydraulic rod.
Preferably, the fixing seat is trapezoidal in shape, and anti-skid grains are formed in the bottom of the fixing seat.
Preferably, the top of the bearing plate is bolted with a protection plate, the protection plate is arc-shaped, and the protection plate is an elastic plate.
Preferably, a protective sleeve is welded inside the protective guard, the threaded rod is located inside the protective sleeve, a top plate is welded at the top of the threaded rod, the diameter of the top plate is smaller than the inner diameter of the protective sleeve, and the diameter of the top plate is larger than the diameter of the threaded rod.
Preferably, the two sides of the protecting sleeve are welded with supporting frames, and the top of each supporting frame is fixedly provided with an illuminating lamp.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the arrangement of the base, the wheels, the motor, the first gear, the second gear, the threaded rod, the limiting structure, the nut, the supporting plate, the limiting sleeve, the limiting rod, the protective guard, the bearing plate, the buffer structure and the supporting structure, the building construction operating platform has the advantages of being capable of adjusting the height, having a protection function, being convenient to move and fix, being convenient for workers to carry out construction operation on high buildings, effectively protecting the workers, improving the mobility of the building construction operating platform, and simultaneously solving the problems that the existing building construction operating platform cannot adjust the height, does not have the protection function and is inconvenient to move and fix.
2. The invention can limit the second gear by matching the vertical plate, the first hydraulic rod, the limiting frame and the limiting teeth, prevent the screw rod from moving due to the reverse rotation caused by gravity, prevent the supporting plate and the protective guard from moving, elastically support the bearing plate by matching the fixed sleeve, the slide rod and the spring, buffer the bearing plate when the bearing plate is subjected to external force, improve the bearing force of the bearing plate, limit the slide rod by using the limiting plate, prevent the slide rod from being separated from the fixed sleeve, fix the device by matching the transverse plate, the second hydraulic rod and the fixed seat, enhance the stability of the device, protect the bearing plate by using the protective plate, further improve the compression resistance and the bearing force of the bearing plate, and obstruct the screw rod by using the protective sleeve, prevent that the threaded rod from causing the injury to the staff when rotatory, through the use of roof, can carry on spacingly to the threaded rod, prevent that the threaded rod from unscrewing from the rail guard, use through the cooperation of support frame and light, can throw light on the construction position, make things convenient for the staff to be under construction.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of the invention at A in FIG. 1;
FIG. 3 is an enlarged view of a portion of the present invention at B of FIG. 1;
FIG. 4 is a schematic front view of the structure of the present invention;
FIG. 5 is a schematic bottom sectional view of the position-limiting frame of the present invention.
In the figure: 1. a base; 2. a wheel; 3. a motor; 4. a first gear; 5. a second gear; 6. a threaded rod; 7. a limiting structure; 71. a vertical plate; 72. a first hydraulic lever; 73. a limiting frame; 74. limiting teeth; 8. a nut; 9. a support plate; 10. a limiting sleeve; 11. a limiting rod; 12. protecting the fence; 13. a bearing plate; 14. a buffer structure; 141. fixing a sleeve; 142. a slide bar; 143. a spring; 15. a support structure; 151. a transverse plate; 152. a second hydraulic rod; 153. a fixed seat; 16. a limiting plate; 17. a protection plate; 18. a protective sleeve; 19. a top plate; 20. a support frame; 21. an illuminating lamp; 22. a guard gate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a building construction operation platform comprises a base 1, wheels 2 are rotatably connected to both sides of the bottom of the base 1, a motor 3 is bolted to the top of the base 1, a first gear 4 is clamped to an output shaft of the motor 3, a second gear 5 is engaged with the left side of the first gear 4, a threaded rod 6 is clamped inside the second gear 5, the bottom of the threaded rod 6 is rotatably connected to the inside of the base 1, a limiting structure 7 is arranged on the left side of the second gear 5, a nut 8 is connected to the surface of the threaded rod 6 in a threaded manner, a support plate 9 is welded on the surface of the nut 8, a limiting sleeve 10 is welded to both sides of the bottom of the support plate 9, a limiting rod 11 is slidably connected to the inside of the limiting sleeve 10, the bottom of the limiting rod 11 is welded to the top of the base 1, the support plate 9 and the nut 8 can be limited, the top of the supporting plate 9 is welded with a protective guard 12, the top of the threaded rod 6 extends into the protective guard 12, a bearing plate 13 is arranged above the protective guard 12, two sides of the bottom of the bearing plate 13 are respectively provided with a buffer structure 14, two sides of the base 1 are respectively provided with a supporting structure 15, the front of the protective guard 12 is hinged with a protective door 22, the limiting structure 7 comprises a vertical plate 71, the right side of the vertical plate 71 is connected with a first hydraulic rod 72 in a bolted mode, the right side of the first hydraulic rod 72 is connected with a limiting frame 73 in a bolted mode, limiting teeth 74 are fixedly arranged inside the limiting frame 73, the limiting teeth 74 and the second gear 5 are located on the same horizontal line, the limiting teeth 74 can be meshed with the surface of the second gear 5, the buffer structure 14 comprises a fixing sleeve 141, the surface of the fixing sleeve 141 is welded with the side face of the protective guard 12, a sliding rod 142 is connected inside the fixing sleeve, the top of the spring 143 is bolted with the bottom of the bearing plate 13, the bottom of the spring 143 is bolted with the top of the fixed sleeve 141, the bottom of the sliding rod 142 extends to the lower part of the fixed sleeve 141, the surface of the sliding rod 142 is welded with the limiting plate 16, the top of the limiting plate 16 is in contact with the bottom of the fixed sleeve 141, the supporting structure 15 comprises a transverse plate 151, the bottom of the transverse plate 151 is bolted with a second hydraulic rod 152, the bottom of the second hydraulic rod 152 is bolted with a fixed seat 153, the fixed seat 153 is trapezoidal in shape, the bottom of the fixed seat 153 is provided with anti-slip lines, the top of the bearing plate 13 is bolted with a protection plate 17, the protection plate 17 is arc in shape, the protection plate 17 is an elastic plate, the protective guard 12 is welded with a protective sleeve 18, the threaded rod 6 is positioned inside the protective sleeve 18, the top of the threaded rod 6 is welded with a top plate 19, the, the supporting frames 20 are welded on two sides of the protecting jacket 18, the illuminating lamp 21 is fixedly mounted on the top of the supporting frame 20, the vertical plate 71, the first hydraulic rod 72, the limiting frame 73 and the limiting teeth 74 are used in a matched mode, the second gear 5 can be limited, the threaded rod 6 is prevented from being reversed due to gravity, the supporting plate 9 and the protecting guard 12 are prevented from moving, the bearing plate 13 can be elastically supported through the matched use of the fixing sleeve 141, the sliding rods 142 and the springs 143, the bearing plate 13 can be buffered when being subjected to external force, the bearing force of the bearing plate 13 is improved, the sliding rods 142 can be limited through the use of the limiting plate 16, the sliding rods 142 are prevented from being separated from the fixing sleeve 141, the device can be fixed through the matched use of the transverse plate 151, the second hydraulic rod 152 and the fixing seat 153, the stability of the device is enhanced, through the use of the protecting, the bearing plate 13 can be protected, the compression resistance and the bearing force of the bearing plate 13 are further improved, the threaded rod 6 can be separated through the protective sleeve 18, the threaded rod 6 is prevented from being hurt to workers when rotating, the threaded rod 6 can be limited through the top plate 19, the threaded rod 6 is prevented from being screwed out of the protective guard 12, the construction position can be illuminated through the matched use of the support frame 20 and the illuminating lamp 21, the construction is convenient for the workers, and the building construction operation platform has the advantages that the height can be adjusted through the arrangement of the base 1, the wheels 2, the motor 3, the first gear 4, the second gear 5, the threaded rod 6, the limiting structure 7, the nut 8, the support plate 9, the limiting sleeve 10, the limiting rod 11, the protective guard 12, the bearing plate 13, the buffer structure 14 and the support structure 15, and has a protective function, the convenient advantage of removing and fixing makes things convenient for the staff to carry out the construction operation to the eminence building to effectively protect the staff, and promote construction operation platform's mobility, solved current construction operation platform simultaneously and can't adjust the height, do not have safeguard function, inconvenient removal and fixed problem.
When the device is used, the device is pushed to a required position, then the second hydraulic rod 152 is started, the second hydraulic rod 152 drives the fixed seat 153 to move, then the bottom of the fixed seat 153 contacts the ground, then the motor 3 is started, the motor 3 drives the first gear 4 to rotate, the first gear 4 rotates to drive the second gear 5 to rotate, the second gear 5 rotates to drive the threaded rod 6 to rotate, the threaded rod 6 rotates to drive the nut 8 to move, the nut 8 then drives the support plate 9 and the guard rail 12 to ascend, the ascending of the support plate 9 drives the limiting sleeve 10 to slide on the surface of the limiting rod 11, then the guard rail 12 moves to a desired height, the motor 3 is closed, the first hydraulic rod 72 is started, the first hydraulic rod 72 drives the limiting frame 73 and the limiting teeth 74 to move, then the limiting teeth 74 contact with the second gear 5 to limit the second gear, the staff opens light 21 afterwards, and the construction is carried out, and when falling down as the object of weighing down, the object of weighing down striking guard plate 17, guard plate 17 transmit the dynamics for bearing plate 13 afterwards, and bearing plate 13 extrudees slide bar 142 and spring 143, and spring 143 cushions bearing plate 13's trend of motion afterwards, cushions protection bearing plate 13.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a construction operation platform, includes base (1), its characterized in that: the wheel-type bicycle is characterized in that wheels (2) are rotatably connected to two sides of the bottom of the base (1), a motor (3) is bolted to the top of the base (1), a first gear (4) is connected to an output shaft of the motor (3), a second gear (5) is meshed to the left side of the first gear (4), a threaded rod (6) is connected to the inner portion of the second gear (5) in a clamped mode, the bottom of the threaded rod (6) is rotatably connected with the inner portion of the base (1), a limiting structure (7) is arranged on the left side of the second gear (5), a nut (8) is connected to the surface of the threaded rod (6) in a threaded mode, a supporting plate (9) is welded to the surface of the nut (8), limiting sleeves (10) are welded to two sides of the bottom of the supporting plate (9), limiting rods (11) are slidably connected to the inner portions of the limiting sleeves (10), and the bottom of the limiting, the welding of the top of backup pad (9) has rail guard (12), the top of threaded rod (6) extends to the inside of rail guard (12), the top of rail guard (12) is equipped with bearing plate (13), the both sides of bearing plate (13) bottom all are equipped with buffer structure (14), the both sides of base (1) all are equipped with bearing structure (15), the front of rail guard (12) articulates there is guard gate (22).
2. A construction work platform according to claim 1, wherein: spacing structure (7) include riser (71), the right side bolt of riser (71) has connect first hydraulic stem (72), the right side bolt of first hydraulic stem (72) has connect spacing frame (73), the inside fixed mounting of spacing frame (73) has spacing tooth (74), spacing tooth (74) can mesh with the surface of second gear (5).
3. A construction work platform according to claim 1, wherein: buffer structure (14) are including fixed cover (141), the surface of fixed cover (141) and the side welding of rail guard (12), the inside sliding connection of fixed cover (141) has slide bar (142), the top of slide bar (142) and the bottom welding of bearing plate (13), the surface cover of slide bar (142) is equipped with spring (143).
4. A construction work platform according to claim 3, wherein: the top of the spring (143) is bolted with the bottom of the bearing plate (13), and the bottom of the spring (143) is bolted with the top of the fixed sleeve (141).
5. A construction work platform according to claim 3, wherein: the bottom of the sliding rod (142) extends to the lower part of the fixed sleeve (141), a limiting plate (16) is welded on the surface of the sliding rod (142), and the top of the limiting plate (16) is in contact with the bottom of the fixed sleeve (141).
6. A construction work platform according to claim 1, wherein: the supporting structure (15) comprises a transverse plate (151), a second hydraulic rod (152) is bolted to the bottom of the transverse plate (151), and a fixed seat (153) is bolted to the bottom of the second hydraulic rod (152).
7. The construction work platform of claim 6, wherein: the shape of fixing base (153) is trapezoidal, the bottom of fixing base (153) is seted up anti-skidding line.
8. A construction work platform according to claim 1, wherein: the top bolt of bearing plate (13) has connect guard plate (17), the shape of guard plate (17) is for being the arc, guard plate (17) are the elastic plate.
9. A construction work platform according to claim 1, wherein: the protective sleeve (18) is welded inside the protective guard (12), the threaded rod (6) is located inside the protective sleeve (18), the top of the threaded rod (6) is welded with the top plate (19), the diameter of the top plate (19) is smaller than the inside diameter of the protective sleeve (18), and the diameter of the top plate (19) is larger than the diameter of the threaded rod (6).
10. A construction work platform according to claim 9, wherein: support frames (20) are welded on two sides of the protective sleeve (18), and illuminating lamps (21) are fixedly mounted at the tops of the support frames (20).
CN202010232689.6A 2020-03-28 2020-03-28 Building construction operation platform Pending CN112343322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010232689.6A CN112343322A (en) 2020-03-28 2020-03-28 Building construction operation platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010232689.6A CN112343322A (en) 2020-03-28 2020-03-28 Building construction operation platform

Publications (1)

Publication Number Publication Date
CN112343322A true CN112343322A (en) 2021-02-09

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Application Number Title Priority Date Filing Date
CN202010232689.6A Pending CN112343322A (en) 2020-03-28 2020-03-28 Building construction operation platform

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113123254A (en) * 2021-03-22 2021-07-16 中犇检测认证有限公司 Bridge maintenance platform with safety protection function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU630380A1 (en) * 1976-08-02 1978-10-30 Узбекский Организационно-Технологический Трест "Узоргтехстроймелиорация" Scaffold
CN208137385U (en) * 2018-04-10 2018-11-23 莆田市新创科技有限公司 A kind of scaffold for building
CN109236006A (en) * 2018-10-30 2019-01-18 安徽华星智能停车设备有限公司 The position-limit mechanism of movable parking plate in a kind of parking systems
CN110284698A (en) * 2019-07-26 2019-09-27 湖南高福星智能科技有限公司 Construction safety-type platform and its application method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU630380A1 (en) * 1976-08-02 1978-10-30 Узбекский Организационно-Технологический Трест "Узоргтехстроймелиорация" Scaffold
CN208137385U (en) * 2018-04-10 2018-11-23 莆田市新创科技有限公司 A kind of scaffold for building
CN109236006A (en) * 2018-10-30 2019-01-18 安徽华星智能停车设备有限公司 The position-limit mechanism of movable parking plate in a kind of parking systems
CN110284698A (en) * 2019-07-26 2019-09-27 湖南高福星智能科技有限公司 Construction safety-type platform and its application method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113123254A (en) * 2021-03-22 2021-07-16 中犇检测认证有限公司 Bridge maintenance platform with safety protection function

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Application publication date: 20210209

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