Reusable safety flat net hook device

Abstract

The utility model relates to a reusable safety flat net hook device which comprises a positioning block, a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are movably connected with the positioning block, hook portions are installed at the two ends of the positioning block respectively, a cavity is transversely formed in the positioning block, a two-way threaded lead screw is rotatably installed in the cavity, and a worm gear is installed in the center of the two-way threaded lead screw. A first through groove and a second through groove are symmetrically formed in the top surface of the positioning block, the lower end of the first clamping plate extends into the cavity and is in threaded connection with one end of the two-way threaded lead screw, and the lower end of the second clamping plate extends into the cavity and is in threaded connection with the other end of the two-way threaded lead screw; a third through groove used for avoiding the worm gear is formed in the bottom face of the positioning block, a driving box communicated with the cavity is connected to the position, at the third through groove, of the bottom face of the positioning block, a worm meshed with the worm gear is rotationally installed in the driving box, and one end of the worm penetrates through the driving box and is provided with a hand wheel. The device is convenient to operate, convenient to mount and dismount and high in safety, the mounting stability of the safety flat net is enhanced, and the safety of a construction site is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, and particularly relates to a reusable safe flat net hook device. BACKGROUND

[0002] In the construction of laying horizontal safety net in steel structure engineering, the hook is welded on the lower flange of the H-shaped steel beam first, then the horizontal safety net is hung, after the horizontal safety net is used, the hook is cut off by gas cutting, then the damaged structure is polished, and finally the paint is repaired. Using this method to lay the horizontal safety net will inevitably damage the steel structure, and has the defects of high construction cost, low construction efficiency and complicated construction process, and a large amount of manpower, material resources and financial resources will be wasted.

[0003] At present, the Chinese patent with the application number 201320670943.6 discloses a horizontal safety net hook, which comprises a spring clamp and a steel bar hook arranged on the spring clamp, and the steel bar hook is used for hanging the horizontal safety net. The spring clamp comprises a spring connector, and the two ends of the spring connector are provided with steel beam hooks. The space between the two steel beam hooks is matched with the fixed end of the steel structure, and the two steel beam hooks can be stretched relative to the two sides of the spring connector. Although this horizontal safety net hook is quick to assemble and disassemble, when the horizontal safety net hook is hung on the steel structure, the two steel beam hooks are limited to separate by the elasticity of the spring connector, and then the two steel beam hooks are hung on the steel structure at the same time to fix. Since the spring connector is an elastic member, the two steel beam hooks are elastically connected, so that the two steel beam hooks can be loosened by deforming the spring connector under the action of external force, so that the horizontal safety net hung on the steel structure may slip or even jump due to external force. If the external force is a tensile force in the stretching direction of the spring connector, when the external force is too large, one of the steel beam hooks may be pulled away from the steel structure, which may cause the horizontal safety net hook to fall off and cause danger. There is still room for improvement. CONTENT OF THE UTILITY MODEL

[0004] In view of the defects of the prior art, the utility model provides a reusable safe flat net hook device, which is convenient to operate, safe, easy to install and disassemble, enhances the stability of the installation of the safe flat net, and effectively improves the safety of the construction site.

[0005] The utility model is implemented by the following technical solutions:

[0006] The utility model provides a reusable safety flat net hook device, including the transverse setting of the locating block and the symmetrical setting of first clamping plate and second clamping plate on the locating block and with the active connection of first clamping plate and second clamping plate, the both ends of locating block are installed respectively for the hooking of flat net's hooking part, the cavity is set up transversely in the length direction in the locating block, and the double -threaded screw is rotatably installed in the cavity, the center of double -threaded screw installs worm wheel, the top surface of locating block is opened first through groove and second through groove symmetrically, and the lower end of first clamping plate is through first through groove and is stretched into the cavity and is threadedly connected with one end of double -threaded screw, and the lower end of second clamping plate is through second through groove and is stretched into the cavity and is threadedly connected with the other end of double -threaded screw, the third through groove for avoiding worm wheel is opened in the bottom surface of locating block, and the bottom surface of locating block is connected with the drive box that communicates with the cavity at third through groove, and the worm that is engaged with worm wheel is rotatably installed in the drive box, and one end of worm penetrates drive box and installs hand wheel.

[0007] Further, the cross sections of the first clamping plate and the second clamping plate are both F-shaped, and [type clamping grooves for clamping the flange plates of the H-shaped steel beams are formed on the two clamping plates.

[0008] The first clamping plate and the second clamping plate are clamped with the flange plates of the H-shaped steel beams through the [type clamping grooves, so that the hooking device is conveniently connected with the H-shaped steel, and the stability of the hooking of the safety flat net is ensured.

[0009] Further, the hooking part comprises a mounting frame and a hook, the mounting frame comprises two fixed plates which are parallel and identical in shape, the two fixed plates are connected by a fixed block and form a fixed gap, the hook is rotatably connected between the lower parts of the two fixed plates by a pin shaft, a counterweight is connected to the upper part of the hook on one side of the two fixed plates and located outside the fixed gap, and a limiting block which can abut against the hook is fixed between the other sides of the two fixed plates.

[0010] The hook of the hooking part is movable, the hook is limited in rotation by the cooperation between the counterweight and the limiting block, when the safety flat net is not stressed by a person falling, the hook can be conveniently hooked with the safety flat net by rotating the hook, and when the safety flat net is stressed by a person falling, the hook will rotate and be self-locked after being stressed, which can effectively buffer the great pressure caused by the person falling, and the safety flat net is not easily unhooked from the hook after the hook is stressed, so that the safety of the safety flat net is improved.

[0011] Further, one corner of the lower parts of the two fixed plates is formed with a clearance chamfer.

[0012] The clearance chamfer formed on one corner of the lower parts of the two fixed plates can effectively avoid the hook, so that a clearance is provided for the hook during use, and the hooking of the safety flat net is facilitated.

[0013] The utility model has the advantages of:

[0014] This invention utilizes a handwheel on the positioning block to drive a bidirectional threaded screw via a worm gear, thereby causing the first and second clamping plates to move simultaneously towards each other or away from each other. This facilitates adjustment of the distance between the two clamping plates, allowing them to engage and secure with the flanges of the H-beam. Hooks at both ends of the positioning block allow for the attachment of a safety net using rotating hooks. In the event of an accidental fall, the safety net is momentarily stressed, causing the hooks to press down. The rotating hooks buffer the instantaneous pressure on the safety net, effectively improving its stability and safety. When the safety net is stressed, the hooks remain self-locking, and combined with the limiting action of the limiting block, prevents the safety net from detaching from the hooks, enhancing the stability of the safety net installation.

[0015] This invention is easy to operate, low in cost, highly safe, and easy to install and disassemble, effectively improving the safety of construction sites. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a left-side cross-sectional view of the positioning block in this utility model.

[0018] Figure 3 This is a schematic diagram of the hook device in this utility model.

[0019] Figure 4 for Figure 3 Side view.

[0020] As shown in the figure:

[0021] 1. Positioning block, 2. First clamping plate, 3. Second clamping plate, 4. Hook part, 5. Cavity, 6. Bidirectional threaded screw, 7. Worm gear, 8. First through slot, 9. Second through slot, 10. Third through slot, 11. Drive box, 12. Worm, 13. [-shaped slot, 14. Fixing plate, 15. Hook, 16. Fixing block, 17. Counterweight block, 18. Limiting block, 19. Handwheel. Detailed Implementation

[0022] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0023] The utility model provides a kind of reusable safety flat net hook device, including transversely arranged positioning block 1 and symmetrically arranged first clamping plate 2 and second clamping plate 3 on positioning block 1 and with positioning block 1 active connection, the hook portion 4 for hooking flat net is respectively installed in the both ends of positioning block 1, cavity 5 is transversely opened in the length direction in positioning block 1, and two-way threaded screw rod 6 is rotatably installed in cavity 5, the center of two-way threaded screw rod 6 is installed worm wheel 7, the top surface of positioning block 1 is symmetrically opened first through slot 8 and second through slot 9, the lower end of first clamping plate 2 is extended into cavity 5 through first through slot 8 and is threadedly connected with one end of two-way threaded screw rod 6, and the lower end of second clamping plate 3 is extended into cavity 5 through second through slot 9 and is threadedly connected with the other end of two-way threaded screw rod 6;The third through slot 10 for avoiding worm wheel 7 is opened in the bottom surface of positioning block 1, and the driving box 11 that is communicated with cavity 5 is connected at the third through slot 10 of positioning block 1, the worm 12 that is engaged with worm wheel 7 is rotatably installed in driving box 11, and one end of worm 12 penetrates driving box 11 and is installed hand wheel 19.

[0024] In the embodiment, the cross section of the first clamping plate 2 and the second clamping plate 3 is F-shaped, and [type clamping groove 13 for clamping the flange plate of H-shaped steel beam is formed on the two clamping plates.

[0025] The hook portion 4 includes a mounting frame and a hook 15, the mounting frame includes two fixed plates 14 which are parallel and have the same shape, the two fixed plates 14 are connected by a fixed block 16 and form a fixed gap, the hook 15 is rotatably connected between the lower parts of the two fixed plates 14 by a pin shaft, the upper part of the hook 15 is connected with a counterweight 17 on the side of the two fixed plates 14 which is outside the fixed gap, and the other side of the two fixed plates 14 is fixed with a limiting block 18 which can abut with the hook 15. An avoiding chamfer is formed on a corner of the lower part of the two fixed plates 14 corresponding to the rotating path of the hook 15.

[0026] The working process of the utility model is as follows:

[0027] According to the width of the flange plate of different H-shaped steel beams, the worm 12 is driven to rotate by rotating the hand wheel 19, the worm wheel 7 is driven to rotate by the rotation of the worm 12, the two-way threaded screw rod 6 is driven to rotate by the worm wheel 7, the first clamping plate 2 and the second clamping plate 3 at the two ends of the two-way threaded screw rod 6 can move towards each other or away from each other when the two-way threaded screw rod 6 rotates, the width of the H-shaped steel beam is conveniently adjusted and adapted by the opposite directions of the threads on the two sides of the two-way threaded screw rod 6, the first clamping plate 2 and the second clamping plate 3 are used for clamping and positioning the flange, and the whole positioning block 1 is fixed with the steel beam.

[0028] Then the safety net is connected with the hook 15 of the hook part 4, so that the safety net is hooked on the steel beam, when the safety net is hooked, the hook 15 of the hook part 4 is driven to rotate counterclockwise to rise under the action of the counterweight 18, the counterweight 18 is driven to rotate counterclockwise to rise under the action of gravity, which is convenient for hooking with the safety net, when the accident of falling occurs, the safety net is instantaneously stressed, at this time, the hook 15 connected with the safety net can rotate to buffer the instantaneous pressure, at the same time, the hook 15 can rotate clockwise and always keep the stressed state, so that the safety net and the hook 15 are self-locked, the buffering effect is achieved, and the stability of the connection between the safety net and the hook 15 is ensured, and the safety of the construction site is improved.

[0029] Of course, the above description is not limited to the above examples, and the technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here; the above embodiments and drawings are only used to illustrate the technical scheme of the utility model and are not limited to the utility model, the preferred embodiments of the utility model are described in detail, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. A reusable safety net hanger device, characterized by: The positioning block is provided with a hook portion at both ends for hooking a flat screen, a cavity is formed in the positioning block along the length direction, a two-way threaded screw rod is rotatably installed in the cavity, a worm wheel is installed at the center of the two-way threaded screw rod, a first through groove and a second through groove are symmetrically formed on the top surface of the positioning block, the lower end of the first clamping plate extends into the cavity through the first through groove and is threadedly connected with one end of the two-way threaded screw rod, and the lower end of the second clamping plate extends into the cavity through the second through groove and is threadedly connected with the other end of the two-way threaded screw rod; a third through groove for avoiding the worm wheel is formed on the bottom surface of the positioning block, a drive box in communication with the cavity is connected to the bottom surface of the positioning block at the third through groove, a worm is rotatably installed in the drive box and engages with the worm wheel, and one end of the worm penetrates through the drive box and is provided with a hand wheel.

2. The reusable safety net hanger apparatus of claim 1, wherein: The cross sections of the first clamping plate and the second clamping plate are both F-shaped, and [type clamping grooves for clamping the flange plates of H-shaped steel beams are formed on the two clamping plates.

3. The reusable safety net hanger apparatus of claim 1, wherein: The hook portion comprises a mounting frame and a hook, the mounting frame comprises two fixed plates which are parallel and have the same shape, the two fixed plates are connected by a fixed block and form a fixed gap, the hook is rotatably installed between the lower parts of the two fixed plates by a pin shaft, the upper part of the hook is connected with a counterweight outside the fixed gap on one side of the two fixed plates, and the other side of the two fixed plates is fixed with a limiting block which can abut against the hook.

4. The reusable safety net hanger apparatus of claim 3, wherein: An avoiding chamfer is formed at a corner of the two fixed plate lower parts corresponding to the rotating path of the hook.

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