Scaffold steel pipe safety fastener

Abstract

The invention relates to the technical field of building construction, in particular to a scaffold steel pipe safety fastener. The steel pipe is hooped by the annular shell, a safety belt hook head of a constructor is hung on the hanging ring during use, the position of the safety belt hook head can be fixed, the movable wedge block is arranged on the annular shell, the pressure of the fastener on the steel pipe is increased through the wedge block, and the fastener is more stable in structure; the inner diameter of the annular shell is set to be gradually increased from top to bottom, when an accident occurs, the annular shell moves downwards under the downward pulling force of the safety belt, in the downward moving process, the pressure of the annular shell on the wedge blocks is gradually increased, the pressure of the wedge blocks on the steel pipe is gradually increased, and the friction force between the wedge blocks and the steel pipe is gradually increased; therefore, the downward pulling force of the annular shell is counteracted, so that the annular shell is tightly hooped on the steel pipe; after construction of the area is completed, the fastener is taken down and replaced on the next scaffold vertical rod, use of a middle steel wire rope is reduced, and the safety degree of the safety fastener is higher.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a scaffold steel pipe safety fastener. Background Art

[0002] During the erection and dismantling of scaffolding pipes, high-altitude operations are often involved, so safety belts are required to ensure the safety of workers. Traditional construction methods are mostly to set right-angle fasteners on the scaffolding outer poles as end hanging point connectors, and set steel wire ropes between the two end hanging point connectors to form a horizontal lifeline. During the construction process, the operator hangs the safety belt on the steel wire rope, and drives the safety belt to move along the steel wire rope when moving; the stability of the right-angle fasteners at both ends maintains the life safety of the operator. Currently, most right-angle fasteners are directly clamped on the scaffolding steel pipe. When the operator falls, a momentary downward pulling force will be generated at both ends of the steel wire rope. The friction between the right-angle fastener and the steel pipe cannot completely overcome the downward pulling force, causing the right-angle fastener to move downward, posing a major safety hazard. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing right-angle fasteners and scaffolding steel pipes are not firmly fixed.

[0004] The present invention is to solve the above problems, and its specific scheme is: A scaffold steel pipe safety fastener comprises an annular shell, which is used to be clamped on the steel pipe, and a hanging ring is arranged on the annular shell, and the hanging ring is used to connect the safety belt of the construction workers; the inner ring diameter of the annular shell gradually increases from top to bottom, and a plurality of vertically movable wedges are arranged on the annular shell, and the wedges are equidistantly arranged in the circumferential direction, and the inner end of each wedge abuts against the steel pipe; when the annular shell is subjected to a downward pulling force, the annular shell moves downward, and the pressure of the annular shell on each wedge gradually increases, and the friction between each wedge and the steel pipe gradually increases, and the downward pulling force of the annular shell is offset by the friction force.

[0005] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: The annular shell is hooped on the steel pipe, and the construction worker's safety belt hook is hung on the hanging ring during use, so that the position of the safety belt hook can be fixed, and a movable wedge is set on the annular shell. The wedge is used to increase the pressure of the fastener on the steel pipe, so that the fastener structure is more stable, and the inner diameter of the annular shell is set to gradually increase from top to bottom. When an accident occurs, the annular shell moves downward due to the downward pulling force of the safety belt. During the downward movement, the pressure of the annular shell on the wedge is gradually increased, so that the pressure of the wedge on the steel pipe is gradually increased, and the friction between each wedge and the steel pipe is gradually increased, thereby offsetting the downward pulling force of the annular shell, so that the annular shell is tightly clamped on the steel pipe; when the construction of the area is completed, the fastener can be removed and replaced on the next scaffolding vertical pole. Disassembly is convenient, the use of the intermediate steel wire rope is reduced, the cost is lower, and the safety fastener of the present invention has a higher degree of safety.

[0006] Preferably, a further technical solution of the present invention is: The annular shell includes a first annular shell and a second annular shell, the front ends of the first annular shell and the second annular shell are pinned, the rear ends of the first annular shell and the second annular shell are clamped by a stopper, and the stopper is used to adjust the diameter of the area enclosed between the first annular shell and the second annular shell. Through the above structure, it is convenient to adjust the diameter of the hoop through the stopper, so that the safety fastener of the present invention can be applied to steel pipes of different diameters. At the same time, the pressure of the fastener on the steel pipe can be increased by adjusting the diameter of the hoop, so that the safety of the fastener is higher.

[0007] The position-limiting member includes a spring and a pin, the pin is movably inserted at the rear end of the first annular shell, the spring is sleeved on the pin, one end of the spring is fixed to the pin, and the other end of the spring is fixed to the first annular shell, and the rear end of the second annular shell is provided with a plurality of pin insertion holes, when the spring is in a natural state, the lower end of the pin passes through the first annular shell and is inserted into one of its pin insertion holes. Through the above structure, the first annular shell and the second annular shell can be fixed by inserting the pin into the pin insertion hole, and the spring is provided to prevent the pin from automatically disengaging from the pin insertion hole.

[0008] The position-limiting member further comprises a position-limiting latch, which is arranged at the top end of the first annular housing, and a latch hole is provided at the upper end of the pin shaft, and when the lower end of the pin shaft is inserted into one of the pin shaft insertion holes, the position-limiting latch is inserted into the latch hole. The position of the pin shaft is fixed by the position-limiting latch, so as to further prevent the pin shaft from falling out of the pin shaft insertion hole.

[0009] The first annular housing and the second annular housing are both provided with a plurality of vertical sliding grooves, and the wedge blocks slide in the sliding grooves respectively.

[0010] A fastening block is fixed to the inner end of the wedge block, the inner end of the fastening block is an arc surface matching the shape of the steel pipe, and the outer end of the fastening block is an inclined surface matching the annular shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of Figure 3 is a schematic diagram of the rotating shaft structure of an embodiment of the present invention; Figure 4 is a cross-sectional view of an embodiment of the present invention in use; Figure 5 is a schematic diagram of the structure of a position-limiting member according to an embodiment of the present invention; In the figure: 1. first annular housing; 11. latch; 12. puller block; 13. pin shaft; 14. spring; 15. limit ring; 2. second annular housing; 21. pin shaft insertion hole; 3. wedge block; 31. fastening block; 4. sliding groove; 5. hanging ring; 6. steel pipe; 7. rotating shaft. DETAILED DESCRIPTION

[0012] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0013] See attached Figure 1-5 The embodiment of the present invention discloses a safety fastener for a scaffold steel pipe 6, comprising an annular shell, the annular shell comprising a first annular shell 1 and a second annular shell 2, preferably, the first annular shell 1 and the second annular shell 2 are both semicircular, so that the first annular shell 1 and the second annular shell 2 can fit the shape of the steel pipe 6 after docking; the front ends of the first annular shell 1 and the second annular shell 2 are pinned by a rotating shaft 7, and the rear ends of the first annular shell 1 and the second annular shell 2 are clamped by a limiter, so that the diameter of the hoop can be adjusted by the limiter, so that the safety fastener of the present invention can be applied to steel pipes 6 of different diameters, and at the same time, the pressure of the fastener on the steel pipe 6 can be increased by adjusting the diameter of the hoop, so that the safety of the fastener is higher; when in use, the first annular shell 1 and the second annular shell 2 are connected to each other, and the safety of the fastener is improved. The annular shell 2 is clamped on the steel pipe 6 by a limiter, and a hanging ring 5 is fixed on the first annular shell 1 or the second annular shell 2, and the hanging ring 5 is used to connect the safety belt hook of the construction workers; the inner wall of the first annular shell 1 and the second annular shell 2 is an annular surface inclined outward from top to bottom. When the first annular shell 1 and the second annular shell 2 are docked, the inner ring diameter of the annular shell gradually increases from top to bottom, and a plurality of vertically movable wedge blocks 3 are arranged on the annular shell, and each wedge block 3 is equidistantly arranged circumferentially, and the inner end of each wedge block 3 abuts against the steel pipe 6; when the annular shell is subjected to a downward pulling force, the annular shell moves downward, and the pressure of the annular shell on each wedge block 3 gradually increases, and the friction force between each wedge block 3 and the steel pipe 6 gradually increases, and the downward pulling force of the annular shell is offset by the friction force.

[0014] In this embodiment, the rear ends of the first annular shell 1 and the second annular shell 2 are plug-in structures that cooperate with each other. A pin shaft 13 groove is provided in the middle of the plug-in block at the rear end of the first annular shell 1. The limiting member includes a spring 14 and a pin shaft 13. The pin shaft 13 is movably inserted in the pin shaft 13 groove, and the upper and lower ends of the pin shaft 13 protrude from the pin shaft 13 groove and extend upward and downward from the first annular shell 1. A puller block 12 having a cross-sectional size larger than that of the pin shaft 13 is fixed to the top of the pin shaft 13. A limiting ring 15 is fixedly sleeved in the middle position of the pin shaft 13. The limiting ring 15 abuts against the bottom of the pin shaft 13 groove. The spring 14 is sleeved on the pin shaft 13 in the pin shaft 13 groove, and the upper end of the spring 14 is fixed to the top of the pin shaft 13 groove, and the lower end of the spring 14 is fixed to the top of the limiting ring 15. The second A plurality of pin shaft insertion holes 21 are provided on the upper part of the plug block at the rear end of the annular housing 2, and each pin shaft insertion hole 21 is arranged equidistantly in the circumferential direction. When the spring 14 is in the natural state, the lower end of the pin shaft 13 passes through the first annular housing 1 and is inserted into one of the pin shaft insertion holes 21. When in use, the rear ends of the first annular housing 1 and the second annular housing 2 are docked, and the first annular housing 1 and the second annular housing 2 are pressed toward the middle with force, and the pull block 12 is released. Driven by the spring 14, the pin shaft 13 moves downward, and is inserted into one of the pin shaft insertion holes 21. At this time, the first annular housing 1 and the second annular housing 2 are fixedly connected; the pin shaft 13 can be pulled upward by the pull block 12, and the lower end of the pin shaft 13 can be pulled out of the pin shaft insertion hole 21. At this time, the rear ends of the first annular housing 1 and the second annular housing 2 are not connected. Through the above structure, the diameter of the area enclosed between the first annular housing 1 and the second annular housing 2 is adjustable, and the spring 14 is provided to prevent the pin shaft 13 from automatically disengaging from the pin shaft insertion hole 21.

[0015] In this embodiment, the limiting member further includes a limiting latch 11, which is disposed at the top of the first annular housing 1. A latch hole 11 is provided at the upper end of the pin shaft 13. When the lower end of the pin shaft 13 is inserted into one of the pin shaft insertion holes 21, the limiting latch 11 is inserted into the latch hole 11. The position of the pin shaft 13 is fixed by the limiting latch 11, so as to further prevent the pin shaft 13 from falling out of the pin shaft insertion hole 21.

[0016] In this embodiment, a plurality of vertical sliding grooves 4 are provided on the first annular housing 1 and the second annular housing 2. The sliding grooves 4 are equidistantly arranged in the circumferential direction, and the wedge blocks 3 slide in the sliding grooves 4. A fastening block 31 is fixed to the inner end of the wedge block 3. The inner end of the fastening block 31 is an arc surface matching the shape of the steel pipe 6, and the outer end of the fastening block 31 is an inclined surface matching the annular housing.

[0017] The present invention is clamped on the steel pipe 6 by an annular shell, and a hanging ring is arranged on the annular shell to provide a fixed hanging point for the safety belt of the construction personnel, and a movable wedge block 3 is arranged on the annular shell, and the pressure of the fastener on the steel pipe 6 is increased by the wedge block 3, so that the fastener structure is more stable, and the inner diameter of the annular shell is set to gradually increase from top to bottom. When an accident occurs, the construction personnel's own weight is transmitted to the hanging ring through the safety belt, and the annular shell moves downward due to the downward pulling force of the safety belt. During the downward movement, the pressure of the annular shell on the wedge block 3 gradually increases, so that the pressure of the wedge block 3 on the steel pipe 6 gradually increases, and the friction between each wedge block 3 and the steel pipe 6 gradually increases, thereby offsetting the downward pulling force of the annular shell, so that the annular shell is tightly clamped on the steel pipe 6; at the same time, the safety fastener of the present invention is directly clamped on the scaffolding vertical pole. When the construction of the area is completed, the fastener can be removed and replaced on the scaffolding vertical pole of the next construction area, thereby reducing the use of the intermediate steel wire rope, thereby reducing the cost, and the disassembly is convenient, and the safety fastener of the present invention has a higher degree of safety.

[0018] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A scaffolding steel pipe safety fastener, characterized in that: It includes an annular shell, which is used to be clamped on the steel pipe. A hanging ring is arranged on the annular shell, and the hanging ring is used to connect the safety belt of the construction workers. The inner ring diameter of the annular shell gradually increases from top to bottom. A plurality of vertically movable wedges are arranged on the annular shell, and the wedges are equidistantly arranged circumferentially, and the inner end of each wedge abuts against the steel pipe. When the annular shell is subjected to a downward pulling force, the annular shell moves downward, and the pressure of the annular shell on each wedge gradually increases, and the friction between each wedge and the steel pipe gradually increases, and the downward pulling force of the annular shell is offset by the friction force.

2. The scaffolding steel pipe safety fastener according to claim 1, characterized in that: The annular shell includes a first annular shell and a second annular shell. The front ends of the first annular shell and the second annular shell are pinned together, and the rear ends of the first annular shell and the second annular shell are clamped together by a limiting member, and the limiting member is used to adjust the diameter of the area enclosed between the first annular shell and the second annular shell.

3. The scaffolding steel pipe safety fastener according to claim 2, characterized in that: The limiting member includes a spring and a pin, the pin is movably inserted at the rear end of the first annular shell, the spring is sleeved on the pin, one end of the spring is fixed to the pin, and the other end of the spring is fixed to the first annular shell, and a plurality of pin insertion holes are opened at the rear end of the second annular shell. When the spring is in a natural state, the lower end of the pin passes through the first annular shell and is inserted into one of its pin insertion holes.

4. The scaffolding steel pipe safety fastener according to claim 3, characterized in that: The limiting member also includes a limiting latch, which is arranged at the top end of the first annular shell. The upper end of the pin shaft is provided with a latch hole. When the lower end of the pin shaft is inserted into one of the pin shaft insertion holes, the limiting latch is inserted into the latch hole.

5. The scaffolding steel pipe safety fastener according to claim 2, characterized in that: The first annular housing and the second annular housing are both provided with a plurality of vertical sliding grooves, and the wedge blocks slide in the sliding grooves respectively.

6. The scaffolding steel pipe safety fastener according to claim 1, characterized in that: A fastening block is fixed to the inner end of the wedge block, the inner end of the fastening block is an arc surface matching the shape of the steel pipe, and the outer end of the fastening block is an inclined surface matching the annular shell.

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