CN113585716A - Sliding type fastening device for scaffold accessories - Google Patents

Sliding type fastening device for scaffold accessories Download PDF

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Publication number
CN113585716A
CN113585716A CN202110810451.1A CN202110810451A CN113585716A CN 113585716 A CN113585716 A CN 113585716A CN 202110810451 A CN202110810451 A CN 202110810451A CN 113585716 A CN113585716 A CN 113585716A
Authority
CN
China
Prior art keywords
steel pipe
groove
vertical
scaffold
fastening device
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.)
Withdrawn
Application number
CN202110810451.1A
Other languages
Chinese (zh)
Inventor
李灯全
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.)
Jiangsu Xingzhou Industrial And Mining Equipment Co ltd
Original Assignee
Jiangsu Xingzhou Industrial And Mining Equipment 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 Jiangsu Xingzhou Industrial And Mining Equipment Co ltd filed Critical Jiangsu Xingzhou Industrial And Mining Equipment Co ltd
Priority to CN202110810451.1A priority Critical patent/CN113585716A/en
Publication of CN113585716A publication Critical patent/CN113585716A/en
Withdrawn legal-status Critical Current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
    • E04G7/00Connections between parts of the scaffold
    • E04G7/02Connections between parts of the scaffold with separate coupling elements
    • E04G7/06Stiff scaffolding clamps for connecting scaffold members of common shape
    • E04G7/22Stiff scaffolding clamps for connecting scaffold members of common shape for scaffold members in end-to-side relation
    • 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
    • E04G7/00Connections between parts of the scaffold
    • E04G7/02Connections between parts of the scaffold with separate coupling elements
    • E04G7/06Stiff scaffolding clamps for connecting scaffold members of common shape
    • E04G7/20Stiff scaffolding clamps for connecting scaffold members of common shape for ends of members only, e.g. for connecting members in end-to-end relation

Abstract

The invention discloses a scaffold accessory sliding type fastening device, which comprises fixing blocks, wherein each two fixing blocks are in a group, the fixing blocks are fixed on a vertical steel pipe through a clamping mechanism, a through hole matched with the vertical steel pipe is formed in the center of the top surface of each fixing block, a vertical plate is arranged between each two fixing blocks, a horizontal steel pipe is fixedly arranged on one side of each vertical plate, four vertical grooves matched with the vertical plates are formed in one side, close to each other, of each two fixing blocks, a first groove is formed in the center of one side of the inner wall of each vertical groove, and the scaffold accessory sliding type fastening device can be used for fixing and fastening the steel pipes through the arrangement of the fixing blocks, the through holes, the vertical grooves, the first grooves, the second grooves, rotating blocks, first screw rods, first clamping rods, the vertical plates, first clamping grooves and the clamping mechanism, its fixed effect is better, makes the scaffold frame more stable, has guaranteed staff's safety.

Description

Sliding type fastening device for scaffold accessories
Technical Field
The invention relates to the technical field of scaffolds, in particular to a sliding type fastening device for scaffold accessories.
Background
The scaffold is a working platform which is erected for ensuring that each construction process is smoothly carried out. The scaffold is divided into an outer scaffold and an inner scaffold according to the erected positions; the scaffold can be divided into a wood scaffold, a bamboo scaffold and a steel pipe scaffold according to different materials; the scaffold is divided into a vertical rod type scaffold, a bridge type scaffold, a door type scaffold, a suspension type scaffold, a hanging type scaffold, a lifting type scaffold and a climbing type scaffold according to the structural form;
at present because scaffold accessory fastener, mostly be used in between steel pipe and the steel pipe to consolidate the connection of steel pipe, but current fastener finally is through the bolt fastening, inconvenient dismantlement, and live time is of a specified duration, and the bolt rusts easily or becomes flexible, leads to the straining unstability, thereby can make the scaffold frame that loosens, has certain hidden danger to staff's safety.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the scaffold accessory sliding type fastening device which is more stable in fixing effect and higher in safety.
In order to solve the technical problems, the invention provides the following technical scheme: a sliding type fastening device for scaffold accessories comprises fixing blocks, wherein each two fixing blocks form a group, the fixed blocks are fixed on the vertical steel pipes through clamping mechanisms, through holes matched with the vertical steel pipes are formed in the center of the top surfaces of the fixed blocks, a vertical plate is arranged between every two fixed blocks, a transverse steel pipe is fixedly arranged on one side of the vertical plate, four vertical grooves matched with the vertical plate are respectively arranged on one side, close to each other, of each two fixing blocks, a first groove is arranged at the center of one side of the inner wall of the vertical groove, a second groove is arranged at the center of the other side of the inner wall of the vertical groove, the center positions of four sides of the outer surface of the fixed block are rotatably connected with a rotating block through bearings, one end of the rotating block enters the first groove to be fixedly connected with the first screw rod, first lead screw surface threaded connection first kelly, riser one side top and below central point put all to set up the first draw-in groove with first kelly adaptation.
Preferably, the clamping mechanism includes second kelly and second draw-in groove, erect steel pipe surface equidistance symmetry and seted up a plurality of fixed orificess, through-hole inner wall bilateral symmetry set up with the second draw-in groove of fixed orifices adaptation, erect the first backup pad of the horizontal fixed mounting of steel pipe inner wall, first backup pad top surface central point puts fixed mounting electric telescopic handle, electric telescopic handle one end fixed mounting T type support, two second motors of the equal fixed mounting in T type support both sides, the output shaft fixed mounting second lead screw of second motor, the second kelly of second lead screw surface threaded connection and second draw-in groove adaptation.
Preferably, the horizontal steel pipe comprises a first steel pipe and a second steel pipe which are the same in size, a second support plate is vertically and fixedly installed on the inner wall of the first steel pipe, a third motor is fixedly installed at the center of one side of the second support plate, a third lead screw is fixedly installed on an output shaft of the third motor, a cross rod is in threaded connection with the surface of the third lead screw, and one end of the cross rod is fixedly connected with the inner wall of the second steel pipe.
Preferably, the section of the rotating block is a regular hexagon.
Preferably, a cross-shaped notch is formed in the center of one side of the rotating block.
Preferably, the length of the first clamping bar is greater than the total width of the vertical groove and the second groove.
Preferably, the stop blocks are fixedly installed on one sides of the top surface and the bottom surface of the second clamping rod and are located in the vertical steel pipe.
Preferably, the first steel pipe inner wall bilateral symmetry fixed mounting stopper, the horizontal pole surface bilateral symmetry is seted up with the spacing groove of stopper adaptation.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. the fixing block, the through hole, the vertical groove, the first groove, the second groove, the rotating block, the first screw rod, the first clamping rod, the vertical plate, the first clamping groove and the clamping mechanism are arranged, so that the steel pipe and the steel pipe can be fixed and fastened;
2. according to the invention, by arranging the fixing block, the second clamping groove, the first supporting plate, the electric telescopic rod, the T-shaped bracket, the second motor, the second screw rod and the second clamping rod, the distance between two transverse steel pipes can be adjusted, and the fixing block can be detached and fixed, so that when a certain fixing block is damaged, the fixing block can be detached, maintained or replaced conveniently;
3. according to the invention, the distance between two ends of the first steel pipe and the second steel pipe which are far away from each other can be adjusted by arranging the second supporting plate, the third motor, the third screw rod and the cross rod, so that the distance between the vertical steel pipes can be adjusted;
4. according to the invention, the regular hexagon rotating block is arranged, and the cross-shaped notch is formed in the rotating block, so that the rotating block can be conveniently rotated by adopting various different tools.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a fixing block, a through hole, a vertical groove and a rotating block of the present invention;
FIG. 3 is a schematic cross-sectional view of the fixing block according to the present invention;
FIG. 4 is a schematic structural view of a first steel pipe, a second steel pipe, a vertical plate and a first clamping groove of the invention;
FIG. 5 is a schematic sectional view of the first steel pipe and the second steel pipe according to the present invention;
FIG. 6 is a schematic cross-sectional view of a vertical steel pipe according to the present invention;
FIG. 7 is a schematic view of the structure of FIG. 6 at A in accordance with the present invention;
wherein: 1. a fixed block; 2. erecting a steel pipe; 3. a first steel pipe; 4. a second steel pipe; 5. a through hole; 6. a vertical slot; 7. a first groove; 8. a second groove; 9. rotating the block; 10. a first lead screw; 11. a first clamping rod; 12. a vertical plate; 13. a first card slot; 14. a fixing hole; 15. a second card slot; 16. a first support plate; 17. an electric telescopic rod; 18. a T-shaped bracket; 19. a second motor; 20. a second lead screw; 21. a second clamping rod; 22. a second support plate; 23. a third motor; 24. a third screw rod; 25. a cross bar; 26. a cross-shaped notch; 27. a stopper; 28. a limiting block; 29. a limiting groove.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example (b):
as shown in figures 1-7, the invention provides a scaffold accessory sliding type fastening device, which comprises fixing blocks 1, wherein each two fixing blocks 1 are in a group, the fixing blocks 1 are fixed on a vertical steel pipe 2 through a clamping mechanism, the fixing blocks 1 are fixed on the vertical steel pipe 2 through the clamping mechanism, the distance between horizontal steel pipes is convenient to disassemble and adjust, a through hole 5 matched with the vertical steel pipe 2 is formed in the center of the top surface of each fixing block 1, the fixing blocks 1 can move on the surface of the vertical steel pipe 2 conveniently, a vertical plate 12 is arranged between each two fixing blocks 1 and used for installing and supporting the horizontal steel pipe, the horizontal steel pipe is fixedly installed on one side of the vertical plate 12, four vertical grooves 6 matched with the vertical plates 12 are formed in one side, close to each other, of each two fixing blocks 1 and used for positioning and quickly placing the vertical plates 12, a first groove 7 is formed in the center of one side of the inner wall of each vertical groove 6 and used for placing a first screw rod 10 and a first clamping rod 11, the center position of the other side of the inner wall of the vertical groove 6 is provided with a second groove 8 which is convenient for a first clamping rod 11 to pass through, the center positions of four sides of the outer surface of the fixed block 1 are all rotationally connected with a rotating block 9 through a bearing, the section of the rotating block 9 is regular hexagon, the center position of one side of the rotating block 9 is provided with a cross-shaped notch 26 which is convenient to drive the rotating block to rotate through a clamping rotating block 9 of a using tool, one end of the rotating block 9 enters the first groove 7 and is fixedly connected with a first lead screw 10, the rotating block 9 can drive the first lead screw 10 to rotate conveniently, the length of the first lead screw 10 is less than the depth of the first groove 7, so that a vertical plate 12 cannot touch the first lead screw 10 when moving in the vertical groove 6, the surface of the first lead screw 10 is in threaded connection with the first clamping rod 11, the first clamping rod 10 can be driven to move when rotating, the center positions of the upper side and the lower side of the vertical plate 12 are both provided with first clamping grooves 13 which are matched with the first clamping rod 11, the vertical plate 12 can be fixed in the vertical groove 6 by the first clamping rod 11 through the first clamping groove 13, the length of the first clamping rod 11 is larger than the total width of the vertical groove 6 and the second groove 8, and when the vertical plate 12 is clamped and fixed in the vertical groove 6 by the first clamping rod 11, the first clamping rod 11 can be simultaneously positioned in the first groove 7, the second groove 8 and the vertical groove 6;
at first, insert the riser 12 in the perpendicular groove 6 of a fixed block 1, the perpendicular groove 6 on another fixed block 1 is aligned riser 12 and is inserted again, rotate the commentaries on classics piece 9 again, make it drive first lead screw 10 and rotate, first lead screw 10 drives first kelly 11 activity, make its activity go out first recess 7 rethread first draw-in groove 13, finally get into in the second recess 8, thereby the fixing to riser 12 and fixed block 1 has been accomplished, align latch mechanism with fixed block 1 again, it is fixed with this group of fixed block 1 to reuse latch mechanism at last, thereby accomplished and to the fixing of horizontal steel pipe on erecting steel pipe 2, avoided traditional straining device to use the bolt fastening can rust and live time can become flexible for a long time, thereby scaffold frame's danger can not appear scattering, staff's safety has been guaranteed.
As shown in fig. 1, fig. 3, fig. 6 and fig. 7, this embodiment further discloses that the clamping mechanism includes a second clamping rod 21 and a second clamping groove 15, a plurality of fixing holes 14 are symmetrically formed on the surface of the vertical steel pipe 2 at equal intervals to facilitate the second clamping rod 21 to pass through, second clamping grooves 15 adapted to the fixing holes 14 are symmetrically formed on both sides of the inner wall of the through hole 5, the distance between every two equidistant fixing holes 14 is equal to the distance between every two second clamping grooves 15 on the fixing blocks 1 to facilitate the second clamping rod 21 to enter the second clamping groove 15 through the fixing holes 14 to fix the fixing blocks 1, a first supporting plate 16 is horizontally and fixedly installed on the inner wall of the vertical steel pipe 2, an electric telescopic rod 17 is placed far away from the support, the electric telescopic rod 17 is fixedly installed at the center of the top surface of the first supporting plate 16 to drive the T-shaped support 18 to move, a T-shaped support 18 is fixedly installed at one end of the electric telescopic rod 17 to install and support a second motor 19, two second motors 19 are fixedly arranged on two sides of the T-shaped support 18 and used for providing power for the rotation of the second screw rods 20, the second screw rods 20 are fixedly arranged on output shafts of the second motors 19 and used for driving the second clamping rods 21 to move, the surfaces of the second screw rods 20 are in threaded connection with the second clamping rods 21 matched with the second clamping grooves 15 and used for being inserted into the second clamping grooves 15 so as to fix the fixing block 1, the stop blocks 27 are fixedly arranged on one sides of the top surfaces and the bottom surfaces of the second clamping rods 21, and the stop blocks 27 are positioned in the vertical steel pipes 2 and used for preventing the second clamping rods 21 from moving out of the fixing holes 14;
when the distance between the transverse steel pipes with different distances needs to be set, namely the distance between each group of fixed blocks 1 is set, firstly, the second clamping groove 15 in each group of fixed blocks 1 is aligned to the fixed hole 14 on the vertical steel pipe 2, then the telescopic movement of the electric telescopic rod 17 is adjusted to drive the T-shaped support 18 to move in the vertical steel pipe 2, the T-shaped support 18 drives the second motor 19 to move in the vertical steel pipe 2, the second clamping rod 21 is aligned to the fixed hole 14, the second motor 19 is further actuated to drive the second lead screw 20 to rotate, the second lead screw 20 drives the second clamping rod 21 to move close to the fixed hole 14, and the second clamping rod moves into the second clamping groove 15 through the fixed hole 14, so that the fixation of each group of fixed blocks 1 is completed, the distance between each group of fixed blocks 1 is conveniently adjusted, and the distance between the transverse steel pipes is conveniently adjusted;
and when a certain fixed block 1 is damaged, the second motor 19 can be started reversely, so that the second motor drives the second screw rod 20 to rotate, the second screw rod 20 drives the second clamping rod 21 to move towards the position close to the second motor 19 until the second clamping rod 21 moves out of the second clamping groove 15 and completely enters the vertical steel pipe 2, and therefore the fixed block 1 can be conveniently taken down from the vertical steel pipe 2, and the fixed block 1 can be conveniently maintained or replaced.
As shown in fig. 1, 4 and 5, the embodiment further discloses that the horizontal steel pipe includes a first steel pipe 3 and a second steel pipe 4 with the same size, a second support plate 22 is vertically and fixedly installed on the inner wall of the first steel pipe 3 for supporting and placing a third motor 23, a third motor 23 is fixedly installed at the center position of one side of the second support plate 22 for providing power for the rotation of a third screw rod 24, a third screw rod 24 is fixedly installed on the output shaft of the third motor 23, the surface of the third screw rod 24 is in threaded connection with a cross rod 25, the diameter of the cross rod 25 is matched with the diameter of the inner wall of the first steel pipe 3, the cross rod 25 can be driven to move when the third screw rod 24 rotates, one end of the cross rod 25 is fixedly connected with the inner wall of the second steel pipe 4, the cross rod 25 can drive the second steel pipe 4 to move when moving, the other end of the second steel pipe 4 also passes through a vertical plate 12, so as to adjust the distance between the two ends of the second steel pipe 4 and the first steel pipe 3, the distance between the vertical steel pipes 2 can be adjusted, the limiting blocks 28 are symmetrically and fixedly arranged on two sides of the inner wall of the first steel pipe 3, the limiting grooves 29 matched with the limiting blocks 28 are symmetrically formed in two sides of the outer surface of the cross rod 25, when the cross rod 25 moves in the first steel pipe 3, the limiting blocks 28 move in the limiting grooves 29, and the cross rod 25 can be prevented from being separated from the inside of the first steel pipe 3 in the moving process;
and starting the third motor 23 to drive the third screw rod 24 to rotate, wherein the third screw rod 24 drives the cross rod 25 to move on the inner wall of the first steel pipe 3, so that the cross rod 25 drives the second steel pipe 4 to move towards the direction close to the first steel pipe 3 or away from the first steel pipe 3, the adjustment of the distance between two ends of the first steel pipe 3 and the distance between two ends of the second steel pipe 4 are mutually far away is completed, and the adjustment of the distance between the vertical steel pipes 2 is completed.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides a scaffold frame accessory slidingtype straining device, includes fixed block (1), its characterized in that: every two fixing blocks (1) are in a group, the fixing blocks (1) are fixed on a vertical steel pipe (2) through a clamping mechanism, through holes (5) matched with the vertical steel pipe (2) are formed in the center positions of the top surfaces of the fixing blocks (1), a vertical plate (12) is arranged between every two fixing blocks (1), a horizontal steel pipe is fixedly installed on one side of the vertical plate (12), four vertical grooves (6) matched with the vertical plate (12) are formed in one side, close to one side, of each two fixing blocks (1), a first groove (7) is formed in the center position of one side of the inner wall of each vertical groove (6), a second groove (8) is formed in the center position of the other side of the inner wall of each vertical groove (6), the center positions of the four sides of the outer surface of each fixing block (1) are rotatably connected with a rotating block (9) through bearings, one end of each rotating block (9) enters the first groove (7) to be fixedly connected with a first screw rod (10), first lead screw (10) surface threaded connection first kelly (11), riser (12) one side top and below central point put all offer with first draw-in groove (13) of first kelly (11) adaptation.
2. The scaffold fitting slide fastening device of claim 1, wherein: clamping mechanism includes second kelly (21) and second draw-in groove (15), erect steel pipe (2) surface equidistance symmetry and seted up a plurality of fixed orificess (14), through-hole (5) inner wall bilateral symmetry set up with second draw-in groove (15) of fixed orifices (14) adaptation, erect first backup pad (16) of steel pipe (2) inner wall horizontal fixed mounting, first backup pad (16) top surface central point puts fixed mounting electric telescopic handle (17), electric telescopic handle (17) one end fixed mounting T type support (18), two second motors (19) of the equal fixed mounting in T type support (18) both sides, output shaft fixed mounting second lead screw (20) of second motor (19), second kelly (21) of second lead screw (20) surface threaded connection and second draw-in groove (15) adaptation.
3. The scaffold fitting slide fastening device of claim 1, wherein: the horizontal steel pipe comprises a first steel pipe (3) and a second steel pipe (4) which are the same in size, a second supporting plate (22) is vertically and fixedly installed on the inner wall of the first steel pipe (3), a third motor (23) is fixedly installed at the center of one side of the second supporting plate (22), a third lead screw (24) is fixedly installed on an output shaft of the third motor (23), the surface of the third lead screw (24) is in threaded connection with a cross rod (25), and one end of the cross rod (25) is fixedly connected with the inner wall of the second steel pipe (4).
4. The scaffold fitting slide fastening device of claim 1, wherein: the section of the rotating block (9) is a regular hexagon.
5. The scaffold fitting slide fastening device of claim 1, wherein: the center of one side of the rotating block (9) is provided with a cross-shaped notch (26).
6. The scaffold fitting slide fastening device of claim 1, wherein: the length of the first clamping rod (11) is larger than the total width of the vertical groove (6) and the second groove (8).
7. The scaffold fitting slide fastening device of claim 2, wherein: and one sides of the top surface and the bottom surface of the second clamping rod (21) are fixedly provided with a stop block (27), and the stop blocks (27) are positioned in the vertical steel pipe (2).
8. The scaffold fitting slide fastening device of claim 3, wherein: the first steel pipe (3) inner wall bilateral symmetry fixed mounting stopper (28), horizontal pole (25) surface bilateral symmetry is seted up with stopper (28) adaptation spacing groove (29).
CN202110810451.1A 2021-07-16 2021-07-16 Sliding type fastening device for scaffold accessories Withdrawn CN113585716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110810451.1A CN113585716A (en) 2021-07-16 2021-07-16 Sliding type fastening device for scaffold accessories

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110810451.1A CN113585716A (en) 2021-07-16 2021-07-16 Sliding type fastening device for scaffold accessories

Publications (1)

Publication Number Publication Date
CN113585716A true CN113585716A (en) 2021-11-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110810451.1A Withdrawn CN113585716A (en) 2021-07-16 2021-07-16 Sliding type fastening device for scaffold accessories

Country Status (1)

Country Link
CN (1) CN113585716A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114704074A (en) * 2022-02-18 2022-07-05 杭州宏美建筑设备发展有限公司 Scaffold anti-skidding fixing part convenient to disassemble and assemble and fixing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114704074A (en) * 2022-02-18 2022-07-05 杭州宏美建筑设备发展有限公司 Scaffold anti-skidding fixing part convenient to disassemble and assemble and fixing method
CN114704074B (en) * 2022-02-18 2023-10-03 杭州宏美建筑设备发展有限公司 Anti-skid fixing piece and fixing method for scaffold convenient to disassemble and assemble

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Application publication date: 20211102

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