Retracting and releasing device for building protective net

Abstract

The invention relates to the field of building construction auxiliary devices, in particular to a winding and unwinding device for a building protective net. The device is used on a scaffold and comprises a length-changeable retracting and releasing mechanism, a protective net is wound on the retracting and releasing mechanism, when the protective net is released, the retracting and releasing mechanism retracts to the minimum length, the protective net is in an extruded and bent state in the vertical direction, and when the protective net is retracted and wound, the retracting and releasing mechanism extends to the maximum length. The protective net is in a straightened state in the vertical direction. According to the scaffold protective net, whether the protective net is released or retracted, the protective net can be directly operated on the scaffold, the protective net is released for one time and detached for one time, the protective net is integrally ordered, and the problem that the protective net is scattered to cause inconvenience in use is solved.

Description

Technical Field

[0001] This invention relates to the field of auxiliary devices for building construction, and more particularly to a device for retracting and extending building safety nets. Background Technology

[0002] Construction safety nets are safety facilities installed on the exterior or interior of buildings to prevent people and materials from falling and to block the spread of construction waste and dust. They are an indispensable safety measure in modern construction. Safety nets need to be unfolded and tied to scaffolding. Loose safety nets are inconvenient for workers to handle during construction and difficult to dismantle, both of which affect construction efficiency.

[0003] Chinese patent CN114476865A discloses a winding and unwinding device for building safety nets, which avoids the situation where the safety net cannot be fully unwound due to wrinkles when it is being wound up, resulting in local accumulation of the safety net on the winding roller and the safety net becoming tangled and knotted.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: the equipment can only be used in open areas. During installation, operators still need to remove the protective netting first and then take it to the scaffolding to tie it up, which still cannot avoid the problem of the protective netting being scattered. During disassembly, operators need to remove the protective netting and take it to an open area to roll it up with the winding device. It cannot be used on the construction site (on the scaffolding) and does not provide direct assistance for the on-site installation and storage of the protective netting. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art that protective netting cannot be retracted or extended on scaffolding, and to propose a retraction and extension device for building protective netting.

[0006] The technical solution of the present invention: A retractable device for building safety nets, used on scaffolding, includes a retractable mechanism that can change length. The safety net is wound around the retractable mechanism. When the safety net is released, the retractable mechanism retracts to its minimum length, and the safety net is in a compressed and bent state in the vertical direction. When the safety net is retracted and wound, the retractable mechanism extends to its maximum length, and the safety net is in a straightened state in the vertical direction.

[0007] Preferably, the scaffolding includes a stepping layer arranged side by side, inner and outer uprights connected to the stepping layer, and outer horizontal bars arranged side by side on the outer uprights.

[0008] Preferably, the take-up and take-down mechanism includes two cooperating telescopic upper take-up assembly and lower take-up assembly, as well as two cooperating telescopic upper operating assembly and lower operating assembly.

[0009] Preferably, the lower winding assembly includes a base plate, a lower turntable rotatably mounted on the base plate, and a lower winding / unwinding rod vertically mounted on the lower turntable.

[0010] Preferably, a flat plate b is provided on the base plate, a vertically rotatable shaft is provided on the flat plate b, a gear is provided on the shaft, and an annular gear ring is provided at the bottom of the lower turntable, the annular gear ring meshing with the gear.

[0011] Preferably, the upper winding assembly includes a top plate, an upper turntable rotatably disposed at the bottom of the top plate, and an upper winding / unwinding rod vertically disposed at the bottom of the upper turntable, wherein the upper winding / unwinding rod and the lower winding / unwinding rod are telescopically connected.

[0012] Preferably, the lower operating component includes a flat plate a disposed on the base plate, and a lower adjusting rod disposed vertically on the flat plate a, with a threaded hole at the top of the lower adjusting rod.

[0013] Preferably, the upper adjustment assembly includes a plate a disposed on the top plate, an upper adjustment rod disposed vertically at the bottom of the plate a, and an adjustment screw disposed rotatably at the bottom of the upper adjustment rod, the adjustment screw being screwed into a threaded hole.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: whether it is extending or retracting the protective net, it can be operated directly on the scaffolding. It can be extended and used in stages, and dismantled and retracted in stages. The protective net is orderly as a whole, and there will be no problem of the protective net being scattered and causing inconvenience in use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 for Figure 1 A structural diagram after the scaffolding has been removed; Figure 3 for Figure 2 A schematic diagram of the structure after the protective netting has been removed; Figure 4 for Figure 3 Exploded view; Figure 5 for Figure 4 Partial structural diagram; Attached reference numerals: 1. Scaffolding; 2. Step layer; 3. Outer column; 4. Outer horizontal bar; 5. Inner column; 6. Protective netting; 7. Base plate; 8. Lower turntable; 9. Lower extension rod; 10. Insertion hole; 11. Strip groove; 12. Flat plate a; 13. Lower adjusting rod; 14. Threaded hole; 15. Top plate; 16. Upper turntable; 17. Upper extension rod; 18. Insertion rod; 19. Limiting screw; 20. Upper adjusting rod; 21. Adjusting screw; 22. Rotating lever; 23. Ring gear; 24. Flat plate b; 25. Gear; 26. Crank handle. Detailed Implementation

[0016] Example 1; as Figures 1-2As shown, the present invention proposes a retractable device for construction safety nets, used on scaffolding 1. It includes a retractable mechanism capable of changing length, with the safety net 6 wound around it. When the safety net 6 is extended, the retractable mechanism retracts to its minimum length, and the safety net 6 is in a compressed and bent state in the vertical direction. Figure 2 As shown, by shortening the retraction mechanism so that its vertical dimension is slightly smaller than the height of the walking passage on scaffold 1, the retraction device can be used smoothly on the scaffold. When the protective net 6 is in the retracted and wound state, the retraction mechanism is extended to its maximum length, and the protective net 6 is in a straight state in the vertical direction. The retraction mechanism can be inserted into the gap in the upper and lower walking passage of scaffold 1. First, a small section of the protective net 6 is removed, then wound up, and then the position of the retraction mechanism is moved forward. The protective net 6 is then removed again, and then wound up again. This process is repeated until the protective net 6 is completely retracted on scaffold 1. Whether releasing or retracting the protective net 6, it can be operated directly on scaffold 1. A little is released and used at a time, and a little is removed and retracted at a time. The protective net 6 is orderly as a whole, and there will be no problem of the protective net 6 being scattered and causing inconvenience in use.

[0017] Furthermore, the scaffold 1 includes a stepping layer 2 arranged side by side, an inner column 5 and an outer column 3 connected to the stepping layer 2, and an outer horizontal bar 4 arranged side by side on the outer column 3. The protective net 6 is mainly tied to the stepping layer 2, the outer column 3 and the outer horizontal bar 4. The vertical dimension of the protective net 6 should be slightly larger than the distance between the two stepping layers 2 in order to ensure that the protective net 6 completely covers the outside of the scaffold 1.

[0018] Example 2; as Figures 3-5 As shown, this invention proposes a retractable device for building safety nets. Compared with Embodiment 1, this embodiment details the structure of the retractable mechanism. The take-up and take-down mechanism includes two retractable upper and lower take-up assemblies, as well as two retractable upper and lower operating assemblies. The upper and lower operating assemblies are used by the operator to hold and move the entire take-up and take-down device.

[0019] The lower winding assembly includes a base plate 7, a lower turntable 8 rotatably mounted on the base plate 7, and a lower winding / unwinding rod 9 vertically mounted on the lower turntable 8. The upper winding assembly includes a top plate 15, an upper turntable 16 rotatably disposed at the bottom of the top plate 15, and an upper winding rod 17 vertically disposed at the bottom of the upper turntable 16. The upper winding rod 17 and the lower winding rod 9 are telescopically connected. Specifically, the lower winding rod 9 has a vertically disposed insertion hole 10 on its top surface. The insertion hole 10 is not a round hole; in this embodiment, the insertion hole 10 is a square hole. The outer wall of the lower winding rod 9 has a strip groove 11 communicating with the insertion hole 10. The bottom of the upper winding rod 17 has a rod 18 that is inserted into the insertion hole 10. The rod 18 has a horizontally disposed threaded hole. A limiting screw 19 engages with the threaded hole. Part of the limiting screw 19 is screwed into the threaded hole, and the other part is located in the strip groove 11. It should be noted that during installation, the rod 18 is first inserted into the insertion hole 10, and then the limiting screw 19 is screwed in. The strip groove 11 limits the lowest and highest positions of the limiting screw 19, thereby limiting the amount of extension.

[0020] The lower operating component includes a flat plate a12 mounted on the base plate 7 and a lower adjusting rod 13 vertically mounted on the flat plate a12. The lower adjusting rod 13 has a threaded hole 14 at its top. The upper adjusting component includes a flat plate a12 mounted on the top plate 15, an upper adjusting rod 20 vertically mounted at the bottom of the flat plate a12, and an adjusting screw 21 rotatably mounted at the bottom of the upper adjusting rod 20. The adjusting screw 21 is screwed into the threaded hole 14. The extension and retraction amount is controlled by adjusting the length of the screw 21 inserted into the threaded hole 14, which indirectly controls the extension and retraction amount of the upper and lower retractable rods 17 and 9. In addition, to facilitate the rotation of the adjusting screw 21, three rotating levers 22 are provided at the top of the adjusting screw 21. The three rotating levers 22 are evenly distributed in a square around the circumference with the axis of the upper adjusting rod 20 as the center. In use, the entire retractable device is placed directly on the footrest layer 2, and the upper adjusting rod 20 and the lower adjusting rod 13 can be pulled to move it.

[0021] Example 3; as Figure 3 As shown, the present invention proposes a device for retracting and extending building safety nets. Compared with Embodiment 2, this embodiment details how to rotate the lower turntable 8. A flat plate b24 is installed on the base plate 7. A vertical and rotatable shaft is installed on the flat plate b24. A gear 25 is installed on the shaft. A ring gear 23 is installed at the bottom of the lower turntable 8. The ring gear 23 meshes with the gear 25. A crank handle 26 is installed at the top of the shaft. By holding the crank handle 26, the shaft and gear 25 can be easily rotated. The ring gear 23 then drives the lower turntable 8 and the lower winding rod 9 to rotate, thereby completing the winding of the protective net 6.

[0022] In summary, when laying the protective netting 6, rotating the adjusting screw 21 increases its insertion depth into the threaded hole 14, shortening the distance between the upper and lower retractable rods 17 and 9 until they contact each other. At this point, the vertical dimension of the entire retractable device is less than the height of the scaffolding 1's walking passage. The entire retractable device is then placed on the scaffolding 1, and one person gradually moves forward and releases the protective netting 6 while another person continuously secures it to the scaffolding 1. When retracting the protective netting 6, the adjusting screw 21 is rotated in the opposite direction to ensure that the vertical length of the entire retractable device is not less than the height of the scaffolding 1's walking passage. As the netting increases in size, it's important to find a gap so that the top of the netting device can pass through the upper stepping layer 2. First, remove a section of the protective netting 6, move the entire device forward to loosen the netting 6, then wind up this loose section of the netting 6. Move forward a distance again, remove another section of the netting 6, and continue moving forward and gradually winding up the netting 6. Whether extending or retracting the netting 6, it can be done directly on the scaffolding 1. You can extend a little, use it a little, remove a little, and retract it a little. The netting 6 remains orderly and will not be scattered, causing inconvenience.

[0023] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A device for retracting and extending building safety nets, characterized in that, Used on scaffolding (1), including a retraction mechanism that can change length, with a protective net (6) wrapped around the retraction mechanism. When the protective net (6) is in the extended state, the retraction mechanism retracts to the minimum length, and the protective net (6) is in a squeezed and bent state in the vertical direction. When the protective net (6) is in the retracted and wrapped state, the retraction mechanism extends to the maximum length, and the protective net (6) is in a straightened state in the vertical direction.

2. The retractable device for building safety nets according to claim 1, characterized in that, The scaffold (1) includes a stepping layer (2) arranged side by side, an inner column (5) and an outer column (3) connected to the stepping layer (2), and an outer crossbar (4) arranged side by side on the outer column (3).

3. The retractable device for building safety nets according to claim 1, characterized in that, The take-up and take-down mechanism includes two retractable upper and lower take-up assemblies, as well as two retractable upper and lower operating assemblies.

4. The retractable device for building safety nets according to claim 3, characterized in that, The lower winding assembly includes a base plate (7), a lower turntable (8) rotatably mounted on the base plate (7), and a lower winding and unwinding rod (9) vertically mounted on the lower turntable (8).

5. The retractable device for building safety nets according to claim 4, characterized in that, A flat plate b (24) is set on the base plate (7). A rotating shaft is set vertically and rotatably on the flat plate b (24). A gear (25) is set on the rotating shaft. A ring gear (23) is set at the bottom of the lower turntable (8). The ring gear (23) meshes with the gear (25).

6. The retractable device for building safety nets according to claim 4, characterized in that, The upper winding assembly includes a top plate (15), an upper turntable (16) rotatably disposed at the bottom of the top plate (15), and an upper winding rod (17) vertically disposed at the bottom of the upper turntable (16). The upper winding rod (17) and the lower winding rod (9) are telescopically connected.

7. The retractable device for building safety nets according to claim 6, characterized in that, The lower operating component includes a flat plate a (12) set on the base plate (7) and a lower adjusting rod (13) set vertically on the flat plate a (12), with a threaded hole (14) at the top of the lower adjusting rod (13).

8. The retractable device for building safety nets according to claim 7, characterized in that, The upper adjustment assembly includes a flat plate a (12) set on the top plate (15), an upper adjustment rod (20) set vertically at the bottom of the flat plate a (12), and an adjustment screw (21) rotatably set at the bottom of the upper adjustment rod (20). The adjustment screw (21) is screwed into the threaded hole (14).

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