Anti-falling device for lifting type floor door

Abstract

The utility model relates to the technical field of building construction equipment, in particular to an anti-falling device for a lifting type floor door. The door body is arranged on the door frame in an up-down sliding manner; the door body is divided into an upper door body and a lower door body, and when the lower door body moves upwards, the upper door body can be driven to move upwards; the safety door is characterized by further comprising a rope assembly used for connecting the door frame and the lower door body and limiting the lower door body to continue falling after the lower door body is separated from the door frame. The lower door body is connected with the door frame through the rope assembly, if the lower door body falls off, the rope assembly can pull the lower door body, and the situation that the lower door body falls off outwards, and potential safety hazards are caused is avoided.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, and more specifically, to an anti-fall device for lifting floor doors. Background Technology

[0002] With the development of technology, more and more high-rise buildings are emerging. As the number of high-rise buildings increases, construction hoists are also widely used, becoming an important vertical transportation equipment in the construction process of high-rise buildings. The hoist mainly uses a cage to load people or goods, and is driven by a drive mechanism for lifting. Each floor is equipped with a floor door (also known as a safety door) to work in conjunction with the cage door.

[0003] Initially, the cage door and floor door of the construction hoist were independent of each other, requiring separate power systems to handle their lifting and lowering. This wasted a lot of resources and was costly. To address this, our company applied for a utility model patent with publication number CN217627063U, entitled "A Linked Lifting Floor Door," which links the cage door and floor door together. When the cage door rises, it can lift the floor door up as well, and when it descends, they descend synchronously.

[0004] Due to various factors in the construction environment, there is a risk that the upper and lower door panels on floor doors may detach from the door frame. Since the upper door faces inward and the lower door faces outward, if the upper door detaches from the frame and falls, it will be stopped by the lower door and fall to the current floor. However, if the lower door detaches, it will fall outward to the ground. This poses a significant safety hazard and could easily injure people passing by. Therefore, improvements are needed to ensure safety. Utility Model Content

[0005] The main objective of this invention is to provide a fall prevention device for lifting floor doors, in order to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model proposes a fall prevention device for lifting floor doors, comprising:

[0007] Door frame;

[0008] The door body is slidably mounted on the door frame; the door body consists of an upper door body and a lower door body, wherein when the lower door body moves upward, it can cause the upper door body to move upward; it also includes:

[0009] The rope assembly is used to connect the door frame and the lower door body, and to limit the lower door body from falling further after it detaches from the door frame.

[0010] In the above technical solution, the rope assembly further includes:

[0011] The safety rope has one end attached to the door frame and the other end attached to the lower door body.

[0012] In any of the above technical solutions, the rope assembly further includes:

[0013] The winding and unwinding section winds up or unwinds the upper end of the safety rope as the lower door moves upward or downward.

[0014] In any of the above technical solutions, the rope assembly further includes:

[0015] The power unit is used to drive the winding and unwinding mechanism to wind or unwind the safety rope, keeping it taut.

[0016] In any of the above technical solutions, the rope assembly further includes:

[0017] Tension detection module, used to detect the tension of the safety rope;

[0018] The control module of the power unit controls the operating status of the power unit based on the tension information detected by the tension detection module.

[0019] In any of the above technical solutions, the rope assembly further includes:

[0020] A self-locking part is provided on the take-up and untake-up section and is used to lock or unlock the take-up and untake-up section.

[0021] In any of the above technical solutions, the rope assembly further includes:

[0022] The speed measurement module is used to detect the downward movement speed of the lower door.

[0023] The speed measuring module is electrically connected to the control module of the power unit and the self-locking unit. The control module also controls the operating status of the power unit and the self-locking unit based on the speed information detected by the speed measuring module.

[0024] In any of the above technical solutions, further, the upper end of the safety rope is connected to the top of the door frame, and the lower end of the safety rope is connected to the upper end of the lower door body.

[0025] In any of the above technical solutions, the door frame further includes:

[0026] There are two side bars, one on the left and one on the right, and the upper and lower door bodies are slidably mounted on the two side bars;

[0027] And crossbars, which have two and are set one above the other, are used to connect the two side bars;

[0028] The upper door body is provided with a first upper roller group and a first lower roller group that are slidably connected to the side rods on the left and right sides and the upper and lower sides.

[0029] The left and right sides, as well as the top and bottom sides of the lower door body, are provided with a second upper roller group and a second lower roller group that are slidably connected to the side rods; wherein, the second upper roller group is located between the first upper roller group and the first lower roller group;

[0030] The rope assembly is used to connect the upper crossbar to the lower door.

[0031] Beneficial effects: Compared with existing technologies, by connecting the lower door to the door frame with a rope assembly, if the lower door falls off, the rope assembly can hold the lower door in place, preventing it from falling outward and causing safety hazards. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a structural diagram of the present invention without the rope assembly installed;

[0034] Figure 2 This is a schematic diagram of the structure of this utility model with a rope assembly installed;

[0035] Figure 3 This is a schematic diagram of the internal structure of the rope assembly of this utility model;

[0036] Figure 4 This is a schematic diagram of the internal structure of another rope assembly of this utility model;

[0037] Figure 5 This is a connection block diagram of this utility model.

[0038] The annotations in the attached figures are explained as follows:

[0039] 1. Door frame; 11. Side bar; 12. Crossbar; 2. Door body; 21. Upper door body; 22. Lower door body; 23. First upper roller assembly; 24. First lower roller assembly; 25. Second upper roller assembly; 26. Second lower roller assembly; 27. Linkage block; 3. Rope assembly; 31. Bracket; 32. Housing; 33. Winding / unwinding section; 34. Safety rope; 35. Power unit; 36. Tension detection module; 37. Self-locking part; 371. Worm gear; 372. Worm wheel; 38. Speed ​​measuring module. Detailed Implementation

[0040] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0041] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0042] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0045] The fall protection device of this application will be described in detail below through the following embodiments.

[0046] Example 1:

[0047] like Figures 1-4 As shown, in this embodiment, a fall prevention device for a lifting floor door is proposed, comprising: a door frame 1, which consists of two side bars 11 on the left and right and two horizontal bars 12 on the top and bottom; a door body 2, which is slidably mounted on the two side bars 11 of the door frame 1; wherein, the door body 2 is divided into an upper door body 212 and a lower door body 222, and when the lower door body 222 moves upward, it can drive the upper door body 212 to move upward.

[0048] It should be noted that the upper door body 212 is provided with a first upper roller group 23 and a first lower roller group 24 that are slidably connected to the two side rods 11 on the left and right sides and the upper and lower sides; the lower door body 222 is provided with a second upper roller group 25 and a second lower roller group 26 that are slidably connected to the two side rods 11 on the left and right sides and the upper and lower sides; wherein, the second upper roller group 25 is located between the first upper roller group 23 and the first lower roller group 24.

[0049] The upper door body 212 and the lower door body 222 slide up and down on the side rod 11 via a first upper roller group 23, a first lower roller group 24, a second upper roller group 25, and a second lower roller group 26, respectively. Specifically, a linkage block 27 is installed on the lower side of the lower door body 222. After the elevator reaches the corresponding floor, the elevator door opens. During the opening process, the hook-shaped structure at the bottom of the door cooperates with the linkage block 27 to push the lower door body 222 upward. When the second lower roller group 26 on the lower door body 222 abuts against the first lower roller group 24 on the upper door body 212, the lower door body 222 and the upper door body 212 are linked, and the upper door body 212 moves upward simultaneously, so that the floor door is also opened after the elevator door is fully opened. Correspondingly, when the elevator door is closing, it will move downward. During this process, the upper door body 212 and the lower door body 222 will move downward under their own gravity and gradually achieve the purpose of closing the door.

[0050] During use, the roller assemblies on the upper door body 212 and the lower door body 222 may detach from the side bar 11. If this detachment occurs, the upper door body 212 and the lower door body 222 will fall. If the lower door body 222 detaches, the danger is greater. Therefore, a rope assembly 3 is provided to connect the door frame 1 and the lower door body 222 to prevent the lower door body 222 from falling further after it detaches from the door frame 1.

[0051] The lower door 222 is connected to the door frame 1 by the rope assembly 3. If the lower door 222 falls off, the rope assembly 3 can hold the lower door 222 to prevent it from falling outward and causing a safety hazard.

[0052] It should be noted that the malfunction and detachment of the lower door body 222 mainly involves the following two aspects: When the elevator door moves the lower door body 222 upwards and opens it, if the second upper roller group 25 and the second lower roller group 26 on the lower door body 222 become stuck during the downward movement of the elevator door, the lower door body 222 cannot move downwards under its own weight and remains in the open state. In this open state, if the connection between the second upper roller group 25 and the second lower roller group 26 and the suspended lower door body 222 breaks, the lower door body 222 will move downwards rapidly under its own weight and the weight of the upper door body 212, and detach from the side rod 11. At this time, the rope assembly 3 can hold the lower door body 222 in place to prevent it from falling to the ground. Alternatively, if the lower door 222 is not opened and is already detached from the side bar 11, then since the lower door 222 is not subjected to any external force, it remains stationary. If the door on the elevator applies an upward force to the lower door 222, it is highly likely that the lower door 222 will detach from the limit of the side bar 11 and tilt, falling downwards under its own weight. In this case, the lower door 222 can be pulled back by the rope assembly 3 to prevent it from falling to the ground.

[0053] Example 2:

[0054] This embodiment is a further improvement based on Embodiment 1.

[0055] like Figures 2-3 As shown, in this embodiment, the rope assembly 3 includes a safety rope 34, one end of which is disposed on the door frame 1 and the other end of which is disposed on the lower door body 222.

[0056] The safety rope 34 is made of high-strength material. By connecting its two ends to the door frame 1 and the lower door body 222 respectively, even if the lower door body 222 is dislodged from the limit of the side bar 11, it can be blocked by the safety rope 34, thus playing a role in preventing falls.

[0057] It should be noted that the upper end of the safety rope 34 is fixed to the horizontal bar 12 above the door frame 1, and the lower end is fixed to the upper end of the lower door body 222.

[0058] Example 3:

[0059] This embodiment is a further improvement based on Embodiment 2.

[0060] like Figure 3 , Figure 4 As shown, in this embodiment, the rope assembly 3 further includes a winding and unwinding section 33, which winds up or unwinds the upper end of the safety rope 34 when the lower door body 222 moves upward or downward.

[0061] The winding and unwinding section 33 is mainly a winding wheel structure. The upper end of the safety rope 34 is fixed on the winding and unwinding section 33. By rotating, the safety rope 34 can be wound and unwound to prevent the unwound safety rope 34 from affecting the up and down movement of the upper door 212 and the lower door 222.

[0062] In this embodiment, the optimized rope assembly 3 further includes a power unit 35 for driving the winding and unwinding unit 33 to wind or unwind the safety rope 34 so that the safety rope 34 is taut.

[0063] By setting up a power unit 35, the winding and unwinding of the safety rope 34 can be automated.

[0064] Specifically, when the lower door 222 moves upward, the lower door 222 gradually moves closer to the horizontal bar 12 above the door frame 1. At this time, the safety rope 34 is in a slack state and can swing freely under the action of external force. If the swinging safety rope 34 gets stuck on the roller assembly, it will affect the movement of the upper door 212 and the lower door 222. Therefore, under the action of the power unit 35, the winding and unwinding unit 33 can be driven to rotate and the safety rope 34 can be wound up.

[0065] It should be noted that when the lower door body 222 moves upward, the power unit 35 drives the winding and unwinding unit 33 to wind up the safety rope 34; when the lower door body 222 moves downward, the power unit 35 drives the winding and unwinding unit 33 to unwind the safety rope 34.

[0066] In order to enable automatic control, a tension detection module 36 is also provided to detect the tension of the safety rope 34;

[0067] The control module of the power unit 35 controls the operating status of the power unit 35 based on the tension information detected by the tension detection module 36.

[0068] Specifically, when the lower door 222 moves upward, the taut safety rope 34 gradually loosens, and the tension value detected by the tension detection module 36 gradually decreases; when the lower door 222 moves downward, the taut safety rope 34 tightens further, and the tension value detected by the tension detection module 36 gradually increases. Based on this, the tension value T of the safety rope 34 is set, with Tmax and Tmin set. When the tension value ∆T detected by the tension detection module 36 is less than Tmin, the power unit 35 starts, driving the winding and unwinding unit 33 to wind up the safety rope 34; when the tension value ∆T is greater than Tmax, the power unit 35 drives the winding and unwinding unit 33 to unwind the safety rope 34; when ∆T is between Tmin and Tmax, the power unit 35 stops moving.

[0069] The operating status of the power unit 35 is controlled by using the tension detection module 36 to detect the tension of the safety rope 34.

[0070] It should be noted that the tension detection module 36 is a tension detector and is installed near the upper crossbar 12 of the door frame 1 to detect the tension of the safety rope 34. Specifically, a rope tension meter can be used to detect the safety rope 34, which is not only lightweight but also easy to install.

[0071] It should be noted that the power unit 35 is a motor. The forward and reverse rotation speeds of the motor are the winding and unwinding speeds of the winding and unwinding unit 33. The winding speed is less than the upward movement speed of the lower door body 222, and the unwinding speed is greater than the downward movement speed of the lower door body 222. This is to give the safety rope 34 a certain degree of redundancy and avoid excessive load on the motor.

[0072] Example 4:

[0073] This embodiment is a further improvement based on Embodiment 3.

[0074] like Figures 3-5 As shown, in this embodiment, the rope assembly 3 further includes a speed measuring module 38, used to detect the downward movement speed of the lower door 222;

[0075] The self-locking part 37 is provided on the take-up and unwinding part 33 and is used to lock or unlock the take-up and unwinding part 33.

[0076] The speed measuring module 38 is electrically connected to the control module of the power unit 35 and the self-locking part 37. The control module also controls the operating status of the power unit 35 and the self-locking part 37 based on the speed information detected by the speed measuring module 38.

[0077] In the above embodiment, regarding the problem of the lower door 222 falling off, after the lower door 222 loses control and detaches from the side rod 11, the lower door 222 can only stop moving down after the safety rope 34 is stretched to its maximum length. This method has certain safety hazards. Therefore, a speed measuring module 38 and a self-locking part 37 are provided.

[0078] The speed measuring module 38 is used to detect the downward speed of the lower door 222 in real time. Under normal conditions, the lower door 222 is supported by the door of the elevator. When the door on the elevator slowly moves down and closes, the lower door 222 also moves down slowly. At this time, the self-locking part 37 does not start, and the winding part 33 winds up the safety rope 34 normally. If the lower door 222 is separated from the side bar 11, it will move down quickly under the action of gravity. At this time, the downward speed of the lower door 222 detected by the speed measuring module 38 gradually increases and exceeds the set threshold. At this time, the self-locking part 37 starts, locking the winding part 33 and restricting it from winding up the safety rope 34. At the same time, the power part 35 stops running. This can effectively reduce the damage to the upper door 212 and avoid certain safety hazards.

[0079] It should be noted that the speed measurement module 38 is a speed sensor installed on the lower door body 222.

[0080] like Figure 3 and Figure 4 As shown, the rope assembly 3 includes: a bracket 31 welded to the upper end of the crossbar 12 above the door frame 1; a housing 32 mounted on the bracket 31; a winding reel installed inside the housing 32; a safety rope 34 wound on the winding reel; a motor, the motor shaft of which is connected to the roller head at one end of the winding reel via a coupling; a self-locking part 37 for self-locking the winding reel; and the other end of the safety rope 34 passing through the housing 32 and extending downwards to the lower door body 222, where it is fixed. The tension detector can be installed either inside or outside the housing 32.

[0081] Regarding the self-locking part 37, specifically, as follows: Figure 4 As shown, a brake disc or similar structure can be installed on the spool to stop it using hydraulic or electric calipers. Figure 3 As shown, another approach is to utilize a worm gear 372 and worm 371 mechanism. The motor is connected to the worm 371, and the worm gear 372 is mounted on the side of the winding reel. The worm 371 meshes with the worm gear 372. When the motor drives the worm 371 to rotate, the worm gear 372 rotates, driving the winding reel to rotate as well. When the motor stops, even if the safety rope 34 exerts a downward pull on the winding reel, causing the worm gear 372 to attempt to reverse, the frictional force acts in the opposite direction to the movement, creating a resistance torque. This resistance torque is greater than the driving torque generated by the worm gear 372, achieving locking and thus locking the winding reel. Of course, other structures can be used, as long as they can achieve the locking of the winding reel.

[0082] It should be noted that when the lower door 222 rises or falls, the entire weight or most of the weight of the lower door 222 itself is borne by the elevator. The load of the power unit 35 of the rope component is mainly the self-locking part 37, the winding and unwinding part 33 and the safety rope 34. Therefore, the load on the power unit 35 is relatively small. The entire rope component can be miniaturized and installed on the crossbar 12.

[0083] It should be noted that, ideally, the rope assembly would be installed directly in the center of the floor door, ensuring even tension and good stability for the safety rope. However, in reality, the working environment is harsh and easily affected by interference, making the safety rope susceptible to impacts. Over time, this can damage the entire rope assembly. Therefore, it is installed on the side of the floor door, close to the side bar, effectively reducing external influences. Specifically, the lower end of the safety rope is fixed to the second upper roller assembly on one side of the lower door body. A mounting bracket is welded to the side plate of the second upper roller assembly, and the lower end of the safety rope is fixed to the mounting bracket. The lower end of the safety rope is connected to the lower door body through the mounting bracket and the second upper roller assembly. The housing is installed on the crossbar directly above the mounting bracket. This setup effectively reduces external interference to the rope assembly. Although the safety rope experiences uneven tension, the rope assembly itself serves as a fall protection mechanism. Therefore, to ensure its proper functioning, it is installed using the above method. This installation method also facilitates cable routing.

[0084] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A fall arrestor for a lift-type floor door, comprising: Door frame (1); A door body (2) is slidably mounted on the door frame (1); the door body (2) is divided into an upper door body (21)(2) and a lower door body (22)(2), wherein when the lower door body (22)(2) moves upward, it can drive the upper door body (21)(2) to move upward; characterized in that it further includes: The rope assembly (3) is used to connect the door frame (1) and the lower door body (22)(2) and to restrict the lower door body (22)(2) from falling further after it detaches from the door frame (1).

2. A fall arrest device for a lifting landing door as claimed in claim 1, wherein, The rope assembly (3) includes: A safety rope (34) is attached to the door frame (1) at one end and to the lower door body (22) (2) at the other end.

3. A fall arrest device for a lifting landing door as claimed in claim 2, wherein, The rope assembly (3) also includes: The winding and unwinding section (33) winds up or unwinds the upper end of the safety rope (34) when the lower door body (22) (2) moves upward or downward.

4. A fall arrest device for a lifting landing door as claimed in claim 3, wherein, The rope assembly (3) also includes: The power unit (35) is used to drive the winding and unwinding unit (33) to wind or unwind the safety rope (34) so ​​that the safety rope (34) is taut.

5. A fall arrest device for a lifting landing door as claimed in claim 4, wherein, The rope assembly (3) also includes: Tension detection module (36) is used to detect the tension of the safety rope (34); The control module of the power unit (35) controls the operating state of the power unit (35) based on the tension information detected by the tension detection module (36).

6. A fall arrest device for a lifting landing door as claimed in claim 5, wherein, The rope assembly (3) also includes: A self-locking part (37) is provided on the winding and unwinding part (33) for locking or unlocking the winding and unwinding part (33).

7. A fall arrest device for a lifting landing door as claimed in claim 6, wherein, The rope assembly (3) also includes: Speed ​​measuring module (38) is used to detect the downward movement speed of the lower door body (22) (2); The speed measuring module (38) is electrically connected to the control module of the power unit (35) and the self-locking part (37). The control module also controls the operating status of the power unit (35) and the self-locking part (37) according to the speed information detected by the speed measuring module (38).

8. A fall arrest device for a lifting floor door according to any one of claims 2 to 7, wherein The upper end of the safety rope (34) is connected to the top of the door frame (1), and the lower end of the safety rope (34) is connected to the upper end of the lower door body (22) (2).

9. A fall arrest device for a lifting landing door as claimed in claim 1, wherein, The door frame (1) includes: The side rods (11) are two in number and are arranged on the left and right sides. The upper door body (21)(2) and the lower door body (22)(2) are slidably arranged on the two side rods (11). And a crossbar (12), having two of them, arranged vertically, for connecting the two side bars (11); The upper door body (21) (2) is provided with a first upper roller group (23) and a first lower roller group (24) that are slidably connected to the two side rods (11) on the left and right sides and the upper and lower sides. The lower door body (22) (2) is provided with a second upper roller group (25) and a second lower roller group (26) that are slidably connected to the two side rods (11) on the left and right sides and the upper and lower sides; wherein, the second upper roller group (25) is located between the first upper roller group (23) and the first lower roller group (24); The rope assembly (3) is used to connect the upper crossbar (12) and the lower door body (22) (2).

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