A roof wind shaft opening anti-falling device

Abstract

The utility model provides a kind of roof wind shaft mouth anti-falling device, the device includes reel, winding assembly, anti-falling net and adjustable cover plate;Reel is equipped with accommodating space and is set to the opening in the middle part of reel length direction;Winding assembly includes winding roller and rocker, winding roller is rotatably set in accommodating space, rocker is set to reel outside, and is connected to winding roller;Anti-falling net one end is wound in winding roller, other end is connected to adjustable cover plate;Adjustable cover plate and opening buckle connection, and its length can be adjusted.The utility model is by being provided with reel and adjustable cover plate, not only make anti-falling net easy to store, anti-falling net can also be stably, conveniently fixed on roof wind shaft, the shape of anti-falling net can be limited simultaneously, to prevent its from being interwoven knot phenomenon when long time use, ensure the protection effect of anti-falling net.

Description

Technical Field

[0001] This utility model belongs to the field of protective structure technology, and in particular relates to a fall prevention device for roof ventilation shaft openings. Background Technology

[0002] Roof ventilation shafts are primarily used for ventilation within buildings. By capturing wind energy, they promote airflow and achieve natural ventilation. In emergencies, such as fires, ventilation shafts can serve as smoke exhaust channels, helping to quickly remove indoor smoke and buying time for evacuees. They can also be used to blow air into the building during a fire, preventing smoke from entering escape routes and providing fresh air for those fleeing. During construction, protective devices need to be installed at the ventilation shaft openings to prevent objects or people from falling, and these devices must be removed after construction is completed. Current ventilation shaft opening fall protection devices mainly use fiber rope nets fixed to the concrete at the opening with cement nails. The use of cement nails not only damages the appearance of the concrete but also has limited strength; when the fall protection net is subjected to certain forces, the cement nails may loosen, affecting the net's protective performance. Furthermore, the fall protection net is prone to tangling and deformation when exposed to rain for extended periods, making it difficult to reuse. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a roof ventilation shaft opening anti-fall device, which can stably and conveniently fix the anti-fall net to the roof ventilation shaft, ensuring the protective effect of the anti-fall net, and is easy to reuse.

[0004] The technical solution adopted by this utility model is as follows: a roof ventilation shaft opening anti-fall device, including a drum, a winding assembly, an anti-fall net, and an adjustable cover plate; the drum has a receiving space and an opening located in the middle of the drum's length direction; the winding assembly includes a winding roller and a rocker arm, the winding roller being rotatably disposed in the receiving space, and the rocker arm being disposed on the outside of the drum and connected to the winding roller; one end of the anti-fall net is wound around the winding roller, and the other end is connected to the adjustable cover plate; the adjustable cover plate is fastened to the opening, and its length is adjustable.

[0005] Furthermore, the fall protection net is a flexible metal mesh.

[0006] Furthermore, the drum is a hollow cylinder, including an arc-shaped surface and end plates disposed at both ends of the arc-shaped surface, and the opening is disposed on the arc-shaped surface; both ends of the take-up roller are rotatably connected to the end plates respectively; at least one end of the take-up roller extends out of the end plate and is connected to the hand crank.

[0007] Furthermore, the adjustable cover includes a fixed section and telescopic sections connected to both ends of the fixed section. The shape of the fixed section is adapted to the opening and is provided with a telescopic cavity for accommodating the telescopic section. The fall protection net is connected to the fixed section, and a handle is provided at the end of the fixed section opposite to the fall protection net.

[0008] Furthermore, both the fixed section and the expansion joint are square tubes; a plurality of expansion joints are nested and connected in sequence.

[0009] Furthermore, the adjustable cover plate also includes a limiting post and a limiting slot; the limiting slot is disposed on the side wall corresponding to the fixed section and the telescopic section, the limiting post abuts against the limiting slot through an elastic element, and the elastic element is disposed on the inner side of the telescopic section.

[0010] Furthermore, it also includes a sliding limiting component, which includes an arc-shaped tooth and a limiting rod connected to the arc-shaped tooth. The take-up roller is also provided with a limiting groove extending along its circumference. The limiting rod is slidably disposed in the limiting groove and can drive the arc-shaped tooth to slide along the inner wall of the take-up roller to engage with the fall protection net.

[0011] Furthermore, the sliding limiting assembly also includes a limiting stop and an arc-shaped limiting plate. The limiting stop is disposed opposite to the side of the opening near the limiting groove. The limiting stop is provided with an arc-shaped slot. The two ends of the arc-shaped limiting plate are embedded in the arc-shaped slot. The arc-shaped teeth are evenly disposed on the side of the arc-shaped limiting plate near the opening. The limiting rod is connected to the arc-shaped limiting plate.

[0012] Furthermore, the spacing between the arc-shaped teeth is adapted to the mesh size of the fall arrest net.

[0013] The advantages and positive effects of this utility model are:

[0014] (1) By setting up a roll and an adjustable cover, the fall protection net can not only be stored easily, but also be fixed stably and conveniently on the roof ventilation shaft. At the same time, the shape of the fall protection net can be limited to prevent it from getting tangled and knotted during long-term use, thus ensuring the protective effect of the fall protection net.

[0015] (2) After the construction is completed, the device can be easily moved out as a whole, which not only improves the installation and dismantling efficiency of the wind fall device and reduces the difficulty of operation, but also enables the whole device to be reused and reduces construction costs.

[0016] (3) The fall protection net is a flexible metal mesh with good flexibility, plasticity and rigidity, providing reliable protection; the overall structure is compact, reducing space occupation and facilitating transportation and storage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the unused state of a specific embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the unfolded anti-fall net according to a specific embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of a winding assembly according to a specific embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the limiting stop structure of a specific embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram illustrating the use of a specific embodiment of this utility model.

[0022] In the picture:

[0023] 1. Roller; 11. Opening; 12. Limiting groove; 2. Fall protection net; 3. Rewinding assembly; 31. Rewinding roller; 32. Rocker arm; 4. Adjustable cover plate; 41. Fixed section; 42. Telescopic section; 43. Limiting post; 44. Handle; 5. Sliding limiting assembly; 51. Arc-shaped tooth; 52. Limiting pull rod; 53. Arc-shaped limiting plate; 54. Limiting stop; 6. Column. Detailed Implementation

[0024] The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0025] like Figures 1 to 5 As shown in the figure, this utility model embodiment proposes a roof ventilation shaft opening anti-fall device, including a drum 1, a winding assembly 3, an anti-fall net 2, and an adjustable cover plate 4; the drum 1 has an accommodating space and an opening 11 located in the middle of the length direction of the drum 1; the winding assembly 3 includes a winding roller 31 and a rocker arm 32, the winding roller 31 is rotatably disposed in the accommodating space, and the rocker arm 32 is disposed on the outside of the drum 1 and connected to the winding roller 31; one end of the anti-fall net 2 is wound around the winding roller 31, and the other end is connected to the adjustable cover plate 4; the adjustable cover plate 4 is fastened to the opening 11, and its length is adjustable.

[0026] In this application, the accommodating space of the drum 1 is sufficient to accommodate the fall protection net 2 being wound onto the winding assembly 3, and the fall protection net 2 can be unfolded outward through its opening 11; the width of the fall protection net 2 is made according to the opening size of the roof ventilation shaft to be protected, the length of the opening 11 is adapted to the width of the fall protection net 2, and the length of the drum 1 is greater than the length of the opening 11; the winding assembly 3 is used to control the unfolding or winding of the fall protection net 2. By rotating the rocker arm 32, the winding roller 31 can be driven to rotate, unfolding or winding the fall protection net 2 onto the winding roller 31; correspondingly, when the fall protection net 2 is wound onto the winding roller 31, the adjustable cover plate 4 is fastened at the opening 11 to close the drum 1; when the fall protection net 2 is unfolded, the adjustable cover plate 4 is located at the opposite end of the drum 1, and by adjusting the length of the adjustable cover plate 4, it can be matched with the drum 1. The roller 1 and adjustable cover 4 are respectively attached to the columns 6 around the roof ventilation shaft opening, thus connecting the fall arrestor device to the roof ventilation shaft. Through the above technical solution, the roller 1 and adjustable cover 4 not only serve to store the fall arrestor net 2, but also to stably and conveniently fix the device to the roof ventilation shaft. In addition, the adjustable cover 4 has good rigidity. The two ends of the fall arrestor net 2 are respectively fixed to the winding roller 31 and the adjustable cover 4, which can limit the shape of the fall arrestor net 2 to prevent it from tangling and knotting during long-term use. Moreover, this setting allows the device to be easily moved out as a whole after construction, which not only improves the installation and dismantling efficiency of the fall arrestor device and reduces the difficulty of operation, but also allows the whole device to be reused, reducing construction costs. The overall structure is compact, reducing space occupation and facilitating transportation and storage.

[0027] Furthermore, in this embodiment, the fall arrest net 2 is a flexible metal mesh, which has a certain degree of flexibility and plasticity, can be woven into a mesh structure and will not break when it is rolled up and deformed; at the same time, it has a certain degree of rigidity, which can resist the impact of falling objects and provide reliable protection; preferably, the fall arrest net 2 is made of galvanized metal mesh to prevent metal oxidation and rust, and extend the service life of the fall arrest net 2.

[0028] Furthermore, in this embodiment, the drum 1 is a hollow cylinder, including an arc-shaped surface and end plates disposed at both ends of the arc-shaped surface, with an opening 11 disposed on the arc-shaped surface; both ends of the take-up roller 31 are rotatably connected to the end plates; at least one end of the take-up roller 31 extends out of the end plate and is connected to the hand crank 32.

[0029] In one alternative technical solution of the above embodiments, such as Figure 3As shown, the take-up roller 31 includes a roller shaft and take-up reels disposed opposite to each other at both ends of the roller shaft. The fall protection net 2 is wound between the two take-up reels. A mounting seat is provided in the middle of the end plate at one end of the roller 1, and a connecting bearing is provided in the middle of the end plate at the other end. Both ends of the roller shaft extend out of the take-up reels, one end of which is rotatably connected to the mounting seat, and the other end passes through the connecting bearing and is connected to the hand crank 32. The hand crank 32 includes a handle and a grip. One end of the handle is perpendicularly connected to the extended end of the roller shaft, and the other end is rotatably connected to the grip. By rotating the grip, the roller shaft can be driven to rotate, so as to realize the winding or unfolding of the fall protection net 2.

[0030] Furthermore, in this embodiment of the application, the adjustable cover plate 4 includes a fixed section 41 and a telescopic section 42 connected to both ends of the fixed section 41. The shape of the fixed section 41 is adapted to the opening 11 and is provided with a telescopic cavity for accommodating the telescopic section 42. The fall protection net 2 is connected to the fixed section 41, and a handle is provided at the end of the fixed section 41 opposite to the fall protection net 2. The fixed section 41 is directly connected to the fall arrest net 2, providing good fixation and support to prevent entanglement and deformation during construction. Simultaneously, the fixed section 41 fits well with the opening 11, locking it in place when not in use to close the roll 1. A handle allows for convenient and flexible pulling of the adjustable cover plate 4, enabling the fall arrest net 2 to unfold. It also serves as a handle 44 for transporting the entire device. The fastener is designed with a contraction cavity, which, when fitted with the contraction section, allows for adjustment of the length of the adjustable cover plate 4 to accommodate different length requirements when securing the device to the roof ventilation shaft opening. Preferably, the expansion joint 42 is symmetrically arranged relative to the fixed section 41 to improve the uniformity of force distribution on the entire device.

[0031] Furthermore, in the embodiments of this application, both the fixed section 41 and the expansion section 42 are square tubes, and a plurality of expansion sections 42 are nested and connected in sequence. Specifically, each end of the fixed section 41 is provided with several expansion joints 42. Each expansion joint 42 has an expansion cavity for accommodating the expansion joint 42 adjacent to it. The shape and size of the expansion joint 42 adjacent to the fixed section 41 are adapted to the inner wall of the fixed section 41. At the same time, the shape and size of the expansion joint 42 away from the fixed section 41 are adapted to the inner wall of the expansion joint 42 adjacent to and close to the fixed section 41. This allows all expansion joints to retract into the expansion joint 42 closer to the fixed section 41, and all expansion joints 42 to retract into the fixed section 41. By setting the fixed section 41 and expansion joint 42 as square tubes, compared with round tubes, they have better stability when subjected to pressure and torque, thereby improving the structural strength of the entire adjustable cover plate 4. At the same time, it is beneficial for the side wall of the adjustable cover plate 4 to connect with the column 6 of the roof ventilation shaft opening in a planar form, resulting in a larger contact area and a more stable and reliable connection. The nested connection method allows the expansion joints 42 to form a tight fit, further enhancing the integrity and stability of the adjustable cover plate 4.

[0032] Further, in the above embodiment, the adjustable cover plate 4 also includes a limiting post 43 and a limiting slot; the limiting slot is disposed on the corresponding side wall of the fixed section 41 and the telescopic section 42, and the limiting post 43 abuts against the limiting slot through an elastic element, which is disposed inside the telescopic section 42. Specifically, the fixed section 41 has limiting slots at both ends, which can be disposed on any side wall of the fixed section 41 or on two adjacent side walls; an elastic element is disposed on the inner side of the side wall opposite to the limiting slot, and the end of the elastic element facing the limiting slot is connected to the limiting post 43. The end of the limiting post 43 near the limiting slot has a locking head that matches the shape of the limiting slot. The main body of the limiting post 43 is enlarged relative to the cross section of the locking head, and the elastic element is in a compressed state, so that the locking head of the limiting post 43 can extend out of the limiting slot, while the main body of the limiting post 43 is locked in the telescopic cavity of the fixed section 41; at the same time, the limiting post 43 is connected to the fixed section 42. The telescopic joint 42 of component 1 has two end-to-end limiting slots of the same shape and size on its side wall. By adjusting the position of the telescopic joint 42, the limiting slot 12 on the telescopic joint 42 and the limiting slot 12 on the fixed joint 41 form a through hole, allowing the locking connector to pass through the two limiting slots 12, thus achieving the positioning connection between the telescopic joint 42 and the fixed joint 41. At the same time, by pressing the locking connector to retract it into the fixing component, the position of the telescopic joint 42 can be adjusted. Similarly, when there are multiple telescopic joints 42, the positioning connection between the telescopic joints 42 is also carried out in the same way, which will not be elaborated here. Through the above technical solution, the length of the adjustable cover plate 4 can be conveniently and flexibly adjusted.

[0033] Furthermore, in the embodiments of this application, such as Figure 1As shown, the roof ventilation shaft opening fall arrest device also includes a sliding limiting component 5. The sliding limiting component 5 includes an arc-shaped tooth 51 and a limiting rod 52 connected to the arc-shaped tooth 51. The winding roller 31 is also provided with a limiting groove 12 extending circumferentially therein. The limiting rod 52 is slidably disposed in the limiting groove 12 and can drive the arc-shaped tooth 51 to slide along the inner wall of the winding roller 31 to engage with the fall arrest net 2. Specifically, the curvature of the arc-shaped tooth 51 is adapted to the curvature of the inner wall of the winding roller 31. When the limiting rod 52 slides along the limiting groove 12, it can drive the net to approach the unfolded fall arrest net 2 and penetrate into the mesh of the fall arrest net 2 to fix the fall arrest net 2 and prevent it from further unfolding or winding during use, thus affecting the protective performance of the fall arrest net 2.

[0034] Furthermore, in the above embodiments, such as Figure 1 , Figure 2 , Figure 4 As shown, the sliding limit assembly 5 also includes a limit stop 54 and an arc-shaped limit plate 53. The limit stop 54 is disposed opposite to the inner wall of the drum 1 on one side of the opening 11. The limit stop 54 is provided with an arc-shaped groove. The two ends of the arc-shaped limit plate 53 are embedded in the arc-shaped groove. Arc-shaped teeth 51 are evenly disposed on the side of the arc-shaped limit plate 53 near the opening 11. The limit rod 52 is connected to the arc-shaped limit plate 53. Specifically, the arc-shaped limiting plate 53 has an arc-shaped plate with a set length and a set curvature, and is fixed to the inner wall of the drum 1 by a limiting stop 54. The limiting stop 54 is provided with an arc-shaped slot that matches the arc-shaped limiting plate 53. Preferably, the openings 11 of the arc-shaped slots of the two limiting stops 54 are arranged opposite to each other. The two ends of the arc-shaped limiting plate 53 are respectively inserted into the arc-shaped slots. The limiting rod 52 is set on the arc-shaped limiting plate 53. By pulling the arc-shaped limiting plate 53 to move in the limiting groove 12, the arc-shaped limiting plate 53 can be driven to slide in the arc-shaped slot, thereby driving the arc-shaped teeth 51 to move towards the unfolded fall protection net 2 to lock the fall protection net 2. It should be noted that the limiting groove 12 has a set length, so that the limiting rod 52 can only move within this length range, thereby limiting the range of movement of the arc-shaped limiting plate 53 and the arc-shaped teeth 51, so as to prevent the arc-shaped limiting plate 53 from disengaging from the arc-shaped slot and ensuring its limiting function.

[0035] In the above embodiment, the arc-shaped tooth 51 moves toward the opening 11 under the action of the limiting rod 52 and the arc-shaped limiting plate 53, and engages with the fall protection net 2 at the opening 11; the moving range of the arc-shaped limiting plate 53 and the length of the arc-shaped tooth 51 are matched so that the end of the arc-shaped tooth 51 away from the arc-shaped limiting plate 53 can extend to the opposite side of the opening 11.

[0036] Preferably, the limiting rod 52 is provided with a locking member, which is threadedly connected to the portion of the limiting rod 52 that extends outward from the drum 1. By screwing the locking member, the locking member can be pressed against the outer wall of the drum 1 to limit the limiting rod 52, so as to prevent the arc-shaped tooth 51 from moving during use and ensure the stable limiting of the arc-shaped tooth 51 on the fall protection net 2.

[0037] In the above embodiment, the spacing between the arc-shaped teeth 51 is adapted to the mesh of the fall arrest net 2. Along the width direction of the fall arrest net 2, a number of arc-shaped teeth 51 are in the mesh of the fall arrest net 2, which can stably fix the fall arrest net 2 at the opening 11 of the drum 1.

[0038] In this embodiment of the application, the construction method of the above-mentioned roof ventilation shaft opening anti-fall device includes the following steps:

[0039] S1. Place the drum 1 on the outside of the roof ventilation shaft wall, so that both ends of the drum 1 are attached to the roof ventilation shaft column 6.

[0040] Specifically, the walls of the roof ventilation shaft are usually set above the roof, and each of the four corners of the shaft wall is provided with a column 6, and the top of the column 6 is provided with a ventilation shaft canopy; in this embodiment, the two ends of the drum 1 are respectively attached to the side walls of the two columns 6 away from the ventilation shaft opening.

[0041] S2. Pull handle 44 to unfold the fall protection net 2 and extend the adjustable cover 4 to the outside of the well wall on the other side;

[0042] S3. Adjust the extension of the adjustable cover plate 4 so that both ends of the adjustable cover plate 4 are locked onto the column 6 on the other side;

[0043] Specifically, the unfolded fall protection net 2 is erected on the wall of the ventilation shaft, extending from one side of the ventilation shaft opening to the opposite side; the end face of the adjustable cover plate 4 connected to the fall protection net 2 is clamped to the side wall of the column 6 away from the ventilation shaft opening; in order to achieve the clamping installation, the tightness of the fall protection net 2 can be adjusted by adjusting the rocker arm 32 so that both the drum 1 and the adjustable cover plate 4 are clamped to the side wall of the column 6 away from the ventilation shaft opening;

[0044] S4. Lock the fall protection net 2 by sliding limit component 5;

[0045] After the drum 1 and the adjustable cover plate 4 are both locked, the limit rod 52 is pulled to move the arc-shaped limit plate 53 and the arc-shaped tooth 51, so that the arc-shaped tooth 51 locks the fall prevention net 2, and then the limit rod 52 is fixed by the locking part.

[0046] S5. After construction is completed, unlock the fall protection net 2 by sliding the limit component 5, adjust the adjustable cover plate 4 to retract, and roll up the fall protection net 2 by rocker arm 32 so that the adjustable cover plate 4 is fastened to the drum 1.

[0047] The advantages and positive effects of this utility model are:

[0048] (1) By setting up a roll and an adjustable cover, the fall protection net can not only be stored easily, but also be fixed stably and conveniently on the roof ventilation shaft. At the same time, the shape of the fall protection net can be limited to prevent it from getting tangled and knotted during long-term use, thus ensuring the protective effect of the fall protection net.

[0049] (2) After the construction is completed, the device can be easily moved out as a whole, which not only improves the installation and dismantling efficiency of the wind fall device and reduces the difficulty of operation, but also enables the whole device to be reused and reduces construction costs.

[0050] (3) The fall protection net is a flexible metal mesh with good flexibility, plasticity and rigidity, providing reliable protection; the overall structure is compact, reducing space occupation and facilitating transportation and storage.

[0051] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A fall prevention device for roof ventilation shaft openings, characterized in that: The device includes a drum, a winding assembly, a fall arrestor net, and an adjustable cover plate. The drum has a receiving space and an opening located in the middle of its length. The winding assembly includes a winding roller and a rocker arm. The winding roller is rotatably disposed within the receiving space, and the rocker arm is located on the outside of the drum and connected to the winding roller. One end of the fall arrestor net is wound around the winding roller, and the other end is connected to the adjustable cover plate. The adjustable cover plate is fastened to the opening, and its length is adjustable.

2. The roof ventilation shaft opening anti-fall device according to claim 1, characterized in that: The fall protection net is a flexible metal mesh.

3. The roof ventilation shaft opening anti-fall device according to claim 2, characterized in that: The drum is a hollow cylinder, including an arc-shaped surface and end plates disposed at both ends of the arc-shaped surface, and the opening is disposed on the arc-shaped surface; both ends of the take-up roller are rotatably connected to the end plates; at least one end of the take-up roller extends out of the end plate and is connected to the rocker arm.

4. The roof ventilation shaft opening anti-fall device according to any one of claims 1-3, characterized in that: The adjustable cover includes a fixed section and telescopic sections connected to both ends of the fixed section. The shape of the fixed section is adapted to the opening and is provided with a telescopic cavity for accommodating the telescopic section. The fall protection net is connected to the fixed section, and a handle is provided at the end of the fixed section opposite to the fall protection net.

5. The roof ventilation shaft opening anti-fall device according to claim 4, characterized in that: Both the fixed section and the expansion joint are square tubes; a plurality of expansion joints are nested and connected in sequence.

6. The roof ventilation shaft opening anti-fall device according to claim 5, characterized in that: The adjustable cover plate also includes a limiting post and a limiting slot; the limiting slot is disposed on the side wall corresponding to the fixed section and the telescopic section, the limiting post abuts against the limiting slot through an elastic element, and the elastic element is disposed on the inner side of the telescopic section.

7. The roof ventilation shaft opening anti-fall device according to claim 1 or 6, characterized in that: It also includes a sliding limit assembly, which includes an arc-shaped tooth and a limit rod connected to the arc-shaped tooth. The take-up roller is also provided with a limit groove extending along its circumference. The limit rod is slidably disposed in the limit groove and can drive the arc-shaped tooth to slide along the inner wall of the take-up roller to engage with the fall protection net.

8. The roof ventilation shaft opening anti-fall device according to claim 7, characterized in that: The sliding limiting assembly further includes a limiting stop and an arc-shaped limiting plate. The limiting stop is disposed opposite to the side of the opening near the limiting groove. The limiting stop is provided with an arc-shaped slot. Both ends of the arc-shaped limiting plate are embedded in the arc-shaped slot. The arc-shaped teeth are evenly disposed on the side of the arc-shaped limiting plate near the opening. The limiting rod is connected to the arc-shaped limiting plate.

9. The roof ventilation shaft opening anti-fall device according to claim 8, characterized in that: The spacing between the arc-shaped teeth is adapted to the mesh size of the fall arrest net.

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