Elevator personnel protection structure

Abstract

The utility model provides an elevator personnel protection structure which comprises a protection fence frame, a protection cover is fixedly installed above the protection fence frame through bolts, a rolling shaft is rotationally installed above the protection fence frame, and any end of the rolling shaft rotationally penetrates through the protection fence frame and is fixedly connected with an external rotary knob. The winding shaft is fixedly connected with the upper end of the sandwich film, the balance weight sliding blocks are installed on the two sides of the lower end of the sandwich film respectively, each balance weight sliding block is installed in a corresponding sliding groove formed in the inner side of the protective fence frame in a sliding mode, and an outer protective net and an inner protective net which are symmetrically arranged are fixedly installed on the protective fence frame. The sandwich film is arranged between the inner protective net and the outer protective net, so that double-layer isolation is formed, the damage risk is reduced, and the sight is not influenced; the winding shaft is covered by the protective cover to prevent collision deformation, and the inner side space protects the winding film; the counterweight sliding block at the lower end of the sandwich film is matched with the sliding groove, gravity unfolding is achieved, accidental winding is prevented through pin shaft fixing, and safety is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoist protection, and particularly relates to a personnel protection structure for a hoist. Background Art

[0002] As a commonly used vertical transportation equipment in construction, the safety of a material hoist is directly related to the life safety of construction workers. At present, a material hoist for construction (i.e., a construction elevator) mainly consists of a car, a driving mechanism, standard sections, wall attachments, a chassis, a fence, an electrical system, etc. Among them, the personnel protection facility is one of the core components to ensure safety. Although the traditional protection fence structure can provide basic protection, it has significant defects in blocking the fall of small objects.

[0003] For example, for the protection fence recorded in the Chinese utility model patent document with the publication number CN217780461U, although a thin film is arranged on one side of the protection net to close the gap, the thin film is directly exposed to the outside and is extremely easy to be damaged due to being knocked and worn by external objects. In addition, the winding rod and the wound thin film of this structure are both exposed outside, which not only increases the risk of friction between the thin film and the outside, but also causes the winding rod to be easily bent due to being knocked, and finally loses the winding function.

[0004] Therefore, it is very necessary to invent a personnel protection structure for a hoist. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a personnel protection structure for a hoist, which includes a protection fence frame, a protection cover, a winding shaft, a knob, a sandwich film, a counterweight slider, a chute, an outer protection net and an inner protection net. The protection cover is fixedly installed above the protection fence frame through bolts, and the winding shaft is rotatably installed. Any end of the winding shaft rotatably passes through the protection fence frame and is fixedly connected to an external knob; the winding shaft is fixedly connected to the upper end of the sandwich film, and the counterweight sliders are respectively installed on both sides of the lower end of the sandwich film. Each counterweight slider is slidably installed in a corresponding chute opened inside the protection fence frame, and symmetrically arranged outer protection net and inner protection net are fixedly installed on the protection fence frame.

[0006] Preferably, the protection fence frame is of a "U" - shaped structure, and a protection cover with a "U" - shaped cross - section is fixedly installed above the protection fence frame. The protection fence frame and the protection cover are installed together to form a rectangular structure.

[0007] Preferably, the protection cover is located above the winding shaft, the outer protection net and the inner protection net, and the winding shaft is located above the middle between the outer protection net and the inner protection net.

[0008] Preferably, the winding shaft is allowed to wind the sandwich film, and the space inside the protection cover is larger than the diameter of the sandwich film wound by the winding shaft.

[0009] Preferably, the sandwich membrane is a rectangular film structure made of transparent polymer material, and the unfolded sandwich membrane is located between the outer protective net and the inner protective net.

[0010] Preferably, the counterweight sliders installed on both sides below the sandwich membrane are slidably installed in the slide groove. The slide groove is opened in the inner wall of the protective fence frame between the outer protective net and the inner protective net. Each counterweight slider has a through hole, and the lower sides of the protective fence frame have through holes corresponding to the counterweight sliders. The through holes of both allow the pin to pass through.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This utility model features a sandwich membrane positioned between an outer and inner protective net, forming a double-layered isolation structure. This prevents the membrane from being directly exposed to the external environment, significantly reducing the risk of damage caused by impacts and abrasions. Simultaneously, the sandwich membrane, made of transparent polymer material, seals the gaps in the protective net without obstructing the operator's view, thus balancing protection and observation functions.

[0013] This utility model features a rewind shaft completely covered by a protective cover, preventing direct impact from external objects and effectively preventing the rewind shaft from bending or deforming. The inner space of the protective cover is larger than the diameter of the core film after winding, ensuring smooth winding operation and effective protection of the wound film, further extending its service life.

[0014] This utility model utilizes a counterweight slider and a sliding groove at the lower end of the sandwich membrane to ensure vertical unfolding of the film using gravity, preventing displacement due to wind or vibration. The counterweight slider and the through hole below the protective fence frame can be fixed with a pin to prevent accidental winding of the sandwich membrane, enhancing safety during use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is an exploded structural diagram of the present invention.

[0018] In the picture:

[0019] 1. Protective fence frame; 2. Protective cover; 3. Rewinding shaft; 4. Knob; 5. Sandwich membrane; 6. Counterweight slider; 7. Slide groove; 8. Outer protective net; 9. Inner protective net. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0022] As attached Figure 1 To be continued Figure 3 As shown:

[0023] This utility model provides a personnel protection structure for a hoist, including a protective fence frame 1, a protective cover 2, a winding shaft 3, a knob 4, a sandwich membrane 5, a counterweight slider 6, a slide groove 7, an outer protective net 8, and an inner protective net 9. The protective cover 2 is fixedly installed on the top of the protective fence frame 1 by bolts, and the winding shaft 3 is rotatably installed thereon. One end of the winding shaft 3 rotates through the protective fence frame 1 and is fixedly connected to the knob 4 on the outside. The winding shaft 3 is fixedly connected to the upper end of the sandwich membrane 5. The counterweight slider 6 is installed on both sides of the lower end of the sandwich membrane 5. Each counterweight slider 6 is slidably installed in a corresponding slide groove 7 on the inner side of the protective fence frame 1. The outer protective net 8 and the inner protective net 9 are fixedly installed on the protective fence frame 1 in a symmetrical manner.

[0024] Furthermore, the protective fence frame 1 adopts a "U"-shaped metal structure (Q235 steel, with its opening facing upwards, and the height of the vertical sections on both sides matching the standard height of the hoist fence), while the length of the horizontal section is consistent with the width of the hoist inlet. The protective cover 2 is a metal plate with a "U"-shaped cross-section (made of the same material as the protective fence frame 1), with its opening facing downwards, and its vertical sections on both sides extending downwards and fixedly connected to the top horizontal section of the protective fence frame 1 using M8 bolts. After the protective fence frame 1 and the protective cover 2 are installed, they combine to form a rectangular frame structure that is closed at the top and open on all sides, ensuring structural strength while providing a closed protective space for the internal winding shaft 3, the outer protective net 8, and the inner protective net 9.

[0025] Furthermore, the protective cover 2 completely covers the top of the winding shaft 3, the outer protective net 8, and the inner protective net 9, with a distance of no less than 50mm between its lower surface and the top of the winding shaft 3 (to avoid interference between the winding shaft and the protective cover 2 when it rotates). The winding shaft 3 is a cylindrical metal rod, with both ends rotatably mounted on the top inner side of the vertical sections on both sides of the protective fence frame 1 via deep groove ball bearings (model 6206). The central axis of the winding shaft 3 is located on the vertical line between the outer protective net 8 and the inner protective net 9 (both the outer protective net 8 and the inner protective net 9 are steel wire mesh, which are fixed to the front and rear positions of the inner side of the protective fence frame 1 by M6 bolts, respectively), ensuring that the winding shaft 3 is always in the middle area of ​​the double-layer protective net when winding up and down the sandwich membrane 5.

[0026] Furthermore, a slot (with the same length as the take-up shaft 3) is provided axially on the outer cylindrical surface of the take-up shaft 3. A rubber strip matching the slot is heat-pressed onto the upper edge of the sandwich membrane 5. By embedding the rubber strip into the slot and fixing it with epoxy resin, a reliable connection between the sandwich membrane 5 and the take-up shaft 3 is achieved. The inner space height of the protective cover 2 (i.e., the vertical distance between the lower surface of the protective cover 2 and the central axis of the take-up shaft 3) is designed to be 1.2 times the maximum diameter of the sandwich membrane 5 after the take-up shaft 3 has wound it up (for example, if the diameter of the sandwich membrane 5 after it is fully wound up is 150mm, then the inner space height of the protective cover 2 is not less than 180mm). This ensures that there is no contact or friction between the sandwich membrane 5 and the inner wall of the protective cover 2 during the winding process, while also preventing external dust and rainwater from entering the winding area.

[0027] Furthermore, the sandwich membrane 5 is a rectangular transparent film structure made of weather-resistant PVC material with a scratch-resistant surface treatment. When the sandwich membrane 5 is fully unfolded, the gap between its left and right edges and the inner surface of the vertical sections on both sides of the protective fence frame 1 is ≤5mm, and the sandwich membrane 5 is located in the 100mm gap between the outer protective net 8 and the inner protective net 9, forming a triple protection system of "outer protective net blocking large objects + sandwich membrane sealing small gaps + inner protective net providing secondary protection".

[0028] Furthermore, two aluminum alloy square tubes are embedded into the lower edge of the sandwich membrane 5 through a hot-pressing process, and a counterweight slider 6 is welded to each end of each square tube. The slide groove 7 is a T-shaped groove opened on the inner wall of the vertical section on both sides of the protective fence frame 1. The bottom of the counterweight slider 6 is machined with a boss that matches the T-shaped groove. Through the sliding engagement of the boss and the T-shaped groove, the counterweight slider 6 can move smoothly in the vertical direction. A through hole is opened through the center of each counterweight slider 6, and corresponding through holes are opened at the bottom of the vertical section on both sides of the protective fence frame 1. When the sandwich membrane 5 is fully unfolded, a steel pin can be inserted through the through hole between the counterweight slider 6 and the protective fence frame 1 to fix the sandwich membrane 5 in the unfolded state and prevent accidental winding.

[0029] The working principle is as follows: First, when it is necessary to unfold the sandwich membrane 5 to close the gap between the outer protective net 8 and the inner protective net 9, the operator manually turns the knob 4 counterclockwise to drive the winding shaft 3 to rotate in the opposite direction, gradually releasing the sandwich membrane 5 wound on the winding shaft 3; at this time, the counterweight slider 6 at the lower end of the sandwich membrane 5 slides down along the slide groove 7 due to its own gravity, pulling the sandwich membrane 5 to be straightened and unfolded until it completely covers the gap between the outer protective net 8 and the inner protective net 9, forming a protective layer to prevent small objects from falling; then the operator inserts the steel pin into the through hole at the bottom of the counterweight slider 6 and the protective fence frame 1 to fix the unfolded state of the sandwich membrane 5.

[0030] When the sandwich membrane 5 needs to be wound up (such as for maintenance or when no protection is required), the operator first pulls out the fixing pin, and then turns the knob 4 clockwise to drive the winding shaft 3 to rotate in the forward direction. The upper end of the sandwich membrane 5 is gradually wound around its outer cylindrical surface as the winding shaft 3 rotates. As the number of winding turns increases, the contact area between the sandwich membrane 5 and the outer surface of the winding shaft 3 gradually increases, and the static friction between the two increases synchronously. When the friction exceeds the weight of the counterweight slider 6 (including the weight of the sandwich membrane 5 itself), the sandwich membrane 5 stops falling and is wound up stably. The remaining part is kept at the lowest position with the counterweight slider 6 to avoid complete exposure. At this time, most of the sandwich membrane 5 is stored on the winding shaft 3 (except for the part connected to the counterweight slider 6 that is not wound up), and the rest is hidden in the inner space of the protective cover 2 to avoid collision or friction with external objects.

[0031] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A personnel protection structure for a hoist, characterized in that, It includes a protective fence frame (1), a protective cover (2), a winding shaft (3), a knob (4), a sandwich film (5), a counterweight slider (6), a chute (7), an outer protective net (8) and an inner protective net (9). Above the protective fence frame (1), the protective cover (2) is fixedly installed by bolts, and the winding shaft (3) is rotatably installed. Any end of the winding shaft (3) rotatably passes through the protective fence frame (1) and is fixedly connected to an external knob (4); the winding shaft (3) is fixedly connected to the upper end of the sandwich film (5). On both sides of the lower end of the sandwich film (5), the counterweight sliders (6) are respectively installed. Each counterweight slider (6) is slidably installed in a corresponding chute (7) opened inside the protective fence frame (1). On the protective fence frame (1), the symmetrically arranged outer protective net (8) and inner protective net (9) are fixedly installed.

2. The personnel protection structure for a hoist as described in claim 1, characterized in that: The protective fence frame (1) has a "U" - shaped structure. Above the protective fence frame (1), the protective cover (2) with a "U" - shaped cross - section is fixedly installed. The protective fence frame (1) and the protective cover (2) are installed together to form a rectangular structure.

3. The personnel protection structure for a hoist as described in claim 2, characterized in that: The protective cover (2) is located above the winding shaft (3), the outer protective net (8) and the inner protective net (9). The winding shaft (3) is located above the middle between the outer protective net (8) and the inner protective net (9).

4. The personnel protection structure for a hoist as described in claim 3, characterized in that: The winding shaft (3) allows the sandwich film (5) to be wound up, and the inner space of the protective cover (2) is larger than the diameter of the sandwich film (5) after it is wound up by the winding shaft (3).

5. The personnel protection structure for a hoist as described in claim 4, characterized in that: The sandwich film (5) is a rectangular film structure made of a transparent polymer material, and the unfolded sandwich film (5) is located between the outer protective net (8) and the inner protective net (9).

6. The personnel protection structure for a hoist as described in claim 5, characterized in that: The counterweight sliders (6) installed on both sides below the sandwich film (5) are slidably installed in the chutes (7). The chutes (7) are opened on the inner wall of the protective fence frame (1) between the outer protective net (8) and the inner protective net (9). A through - hole is penetrated through each counterweight slider (6), and through - holes corresponding to the counterweight sliders (6) are penetrated through both sides of the lower part of the protective fence frame (1). The through - holes of both allow a pin shaft to pass through.

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