A retractable guardrail for elevator car top

Abstract

This utility model relates to the technical field of elevator car top guardrail equipment, and discloses a retractable guardrail for elevator car tops, including an elevator car top with a rectangular structure. First supports are fixedly connected to the four right angles of the elevator car top. First limiting cylinders are fixedly connected to the upper sides of multiple first supports. Threaded sleeves are fixedly connected to the bottom inner sides of multiple first limiting cylinders. Each threaded sleeve is threaded with a threaded rod, and a first support tube is rotatably connected to each threaded rod. This utility model allows the threaded rods to rotate by rotating a handwheel, causing the first support tubes to rise or fall from the first limiting cylinders. When the elevator is paused for maintenance, each first support can be raised; when the elevator is running normally, each first support can be retracted into the first limiting cylinder, thereby reducing the space occupied by the guardrail in the elevator shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator car top guardrail equipment, and in particular to a retractable guardrail for elevator car tops. Background Technology

[0002] Elevator car top guardrails physically prevent maintenance personnel from falling into the shaft due to operational errors or instability while working on the car top, thus avoiding the risk of falls from height. However, existing elevator car top guardrails are generally fixed guardrail structures made of welded square tubes, and the height of the guardrails is often close to the height of an adult. This means that the fixed height of the guardrail may exceed the top safety space required for normal elevator operation, interfering with the reserved space at the top of the elevator shaft. Based on this, a retractable guardrail for elevator car tops is proposed. Utility Model Content

[0003] To address the technical problem of excessively high fixed guardrails on elevator car tops, this utility model provides a retractable guardrail for elevator car tops.

[0004] This utility model is achieved using the following technical solution: a retractable guardrail for elevator car top, comprising an elevator car top, the elevator car top having a rectangular structure, with a first support fixedly connected to each of the four right angles of the elevator car top, a first limiting cylinder fixedly connected to the upper side of each of the first supports, a threaded sleeve fixedly connected to the inner bottom side of each of the first limiting cylinders, a threaded rod threadedly connected to each threaded sleeve, a first support tube rotatably connected to each threaded rod, and the outer side of each first support tube slidably connected to the inner side of the first limiting cylinder, two first telescopic rod mechanisms respectively provided on both sides of the elevator car top, and two second telescopic rod mechanisms provided on the other side of the elevator car top, each of the first and second telescopic rod mechanisms being provided with a positioning mechanism.

[0005] As a further improvement to the above solution, a rotating handwheel is fixedly connected to the upper end of each of the threaded rods.

[0006] As a further improvement to the above solution, the first telescopic rod mechanism includes two third supports fixedly connected to both sides of the elevator car top, a third limiting cylinder fixedly connected to the upper side of each third support, a third support tube slidably connected to the inner side of each third limiting cylinder, a second connecting rod fixedly connected between each third support on each side and the first support on the nearest side, and a first connecting rod fixedly connected between each third support tube on each side and the first support tube on the nearest side.

[0007] As a further improvement to the above solution, the two telescopic rod mechanism includes two second supports fixedly connected to one side of the elevator car top. A second limiting cylinder is fixedly connected to the upper side of each of the two second supports. A second support tube is slidably connected to the inner side of each of the two second limiting cylinders. A sixth connecting rod is fixedly connected between each of the second supports and the first support on the nearest side. A fifth connecting rod is fixedly connected between each of the second support tubes and the first support tube on the nearest side.

[0008] As a further improvement to the above solution, the positioning mechanism includes multiple positioning holes opened on each of the second and third support tubes, and each of the third and second limiting tubes is slidably connected with a pin, which is engaged with the positioning hole.

[0009] As a further improvement to the above scheme, a fourth connecting rod is fixedly connected between the two first supports on the side away from the second support, and a third connecting rod is fixedly connected between the two first support tubes.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model uses a rotating handwheel to drive the threaded rod to rotate, causing the first support tube to rise or fall from the first limiting cylinder. When the elevator is stopped and under maintenance, each first support can be raised. When the elevator is running normally, each first support can be retracted into the first limiting cylinder, thereby reducing the space occupied by the guardrail in the elevator shaft.

[0012] 2. This utility model can quickly extend and compress the guardrail by cooperating with the rotating handwheel and the pin. By rotating the rotating handwheel, the threaded rod is driven to rotate, and the first support tube is pushed up. When the pin is aligned with the positioning hole below, the pin can be pushed inward to make the pin lock into the positioning hole. The extension and retraction operation is simple and convenient to use. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of a retractable guardrail for the top of an elevator car provided by this utility model;

[0014] Figure 2 for Figure 1 Side view;

[0015] Figure 3 for Figure 1 Top view;

[0016] Figure 4 This is a schematic diagram of the threaded sleeve in one embodiment of the present invention;

[0017] Figure 5This is a schematic diagram of the structure of the pin and the positioning hole in one embodiment of the present invention;

[0018] Figure 6 for Figure 3 Enlarged structural diagram at point A in the middle.

[0019] Explanation of key symbols:

[0020] 1. Elevator car top; 2. Rotary handwheel; 3. Threaded rod; 4. Threaded sleeve; 5. Positioning hole; 6. Pin; 7. First connecting rod; 8. Second connecting rod; 9. Third connecting rod; 10. Fourth connecting rod; 11. Fifth connecting rod; 12. Sixth connecting rod; 21. First support; 22. First limiting cylinder; 23. First support tube; 31. Second support; 32. Second limiting cylinder; 33. Second support tube; 41. Third support; 42. Third limiting cylinder; 43. Third support tube. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example:

[0023] Please combine Figures 1-3 This embodiment provides a retractable guardrail for an elevator car top, including an elevator car top 1. The elevator car top 1 has a rectangular structure, and first supports 21 are fixedly connected to the four right corners of the elevator car top 1. First limiting cylinders 22 are fixedly connected to the upper sides of each of the four first supports 21. Figure 1 As shown, in this embodiment, the first limiting cylinder 22 is a square tube structure with a hollow interior;

[0024] Please combine Figure 4 As shown, each of the four first limiting cylinders 22 has a threaded sleeve 4 fixedly connected to its inner bottom side. Each threaded sleeve 4 is threaded with a threaded rod 3. Each threaded rod 3 is rotatably connected to a first support tube 23. When the threaded rod 3 rotates in the threaded sleeve 4, the threaded rod 3 rises or falls, which drives the first support tube 23 to rise or fall, thereby achieving the function of adjusting the height of the guardrail.

[0025] Please combine Figure 1 As shown, the outer side of each first support tube 23 is slidably connected to the inner side of the first limiting cylinder 22. Two first telescopic rod mechanisms are respectively provided on both sides of the elevator car top 1, and two second telescopic rod mechanisms are provided on the other side of the elevator car top 1. Positioning mechanisms are provided on both the first telescopic rod mechanism and the second telescopic rod mechanism.

[0026] Please combine Figure 4As shown, each threaded rod 3 is fixedly connected to a rotating handwheel 2 at its upper end, and each rotating handwheel 2 is provided with a friction pad.

[0027] Please combine Figure 1 As shown, the first telescopic rod mechanism includes two third supports 41 that are fixedly connected to both sides of the elevator car top 1. It should be noted that in this embodiment, a specific interval is provided between the two third supports 41, and one of the third supports 41 is located on one side of the center line. In other embodiments, the installation positions of the two third supports 41 can be adjusted according to actual needs.

[0028] Please combine Figure 1 As shown, a third limiting cylinder 42 is fixedly connected to the upper side of each third support 41. It should be noted that the third limiting cylinder 42 and the first limiting cylinder 22 have the same external dimensions and structure, both being square tube structures. There is no threaded sleeve-like structure inside the third limiting cylinder 42.

[0029] Please combine Figure 1 As shown, each third limiting cylinder 42 has a third support tube 43 slidably connected to its inner side. The rise or fall of the height of the third support tube 43 is driven by the first support tube 23.

[0030] Please combine Figure 2 As shown, a second connecting rod 8 is fixedly connected between the third support 41 on each side and the first support 21 on the nearest side, and a first connecting rod 7 is fixedly connected between the third support tube 43 on each side and the first support tube 23 on the nearest side. The stability of the entire guardrail structure can be improved through the second connecting rod 8 and the first connecting rod 7.

[0031] Please combine Figure 1 As shown, the two telescopic rod mechanism includes two second supports 31 fixedly connected to one side of the elevator car top 1, and the interval between the two second supports 31 provides a passage to the elevator car top;

[0032] Please combine Figure 1 As shown, a second limiting cylinder 32 is fixedly connected to the upper side of each of the two second supports 31. The interior of the second limiting cylinder 32 is a hollow structure and there is no threaded sleeve structure.

[0033] Please combine Figure 1 As shown, the inner sides of the two second limiting cylinders 32 are respectively slidably connected to the second support tubes 33, and each second support 31 is fixedly connected to the first support 21 on the nearest side with a sixth link 12, and each second support tube 33 is fixedly connected to the first support tube 23 on the nearest side with a fifth link 11.

[0034] Please combine Figure 5As shown, in this embodiment, the positioning mechanism includes two positioning holes 5 opened on each of the second support tube 33 and the third support tube 43, representing different settings for the lifting height. Each of the third limiting tube 42 and the second limiting tube 32 is slidably connected with a pin 6, which is inserted into the positioning hole 5. In this embodiment, the pin 6 is a T-shaped pin, which can be moved or slid inward and outward in the horizontal direction, making it easy to open or release.

[0035] Please combine Figure 2 As shown, a fourth link 10 is fixedly connected between the two first supports 21 on the side away from the second support 31, and a third link 9 is fixedly connected between the two first support tubes 23. The structural stability of the entire guardrail can be improved through the fourth link 10 and the third link 9.

[0036] The implementation principle of a retractable guardrail for elevator car top in this application embodiment is as follows: When staff need to enter the elevator car top for maintenance, the guardrail needs to be raised. First, each pin 6 is pulled outward to unlock it. Then, by rotating the handwheel 2, each threaded rod 3 is driven to rotate. The rotation of the threaded rod 3 pushes each first support tube 23 to rise from the first limiting cylinder 22. When the positioning hole 5 below the first support tube 23 is aligned with one end of the pin 6 on the third limiting cylinder 42, the tube pin 6 is pushed inward to insert into the positioning hole 5, thereby realizing the extension of the elevator car top guardrail.

[0037] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A retractable guardrail for elevator car top, comprising an elevator car top (1), characterized in that, The elevator car top (1) is a rectangular structure. The four right angles of the elevator car top (1) are respectively fixedly connected to the first support (21). The upper side of the first support (21) is fixedly connected to the first limiting cylinder (22). The inner bottom side of the first limiting cylinder (22) is fixedly connected to the threaded sleeve (4). Each threaded sleeve (4) is threadedly connected to the threaded rod (3). Each threaded rod (3) is rotatably connected to the first support tube (23). The outer side of each first support tube (23) is slidably connected to the inner side of the first limiting cylinder (22). Two first telescopic rod mechanisms are respectively provided on both sides of the elevator car top (1). Two second telescopic rod mechanisms are provided on the other side of the elevator car top (1). The first telescopic rod mechanism and the second telescopic rod mechanism are both provided with positioning mechanisms.

2. The retractable guardrail for the top of an elevator car as described in claim 1, characterized in that, Each of the threaded rods (3) has a rotating handwheel (2) fixedly connected to its upper end.

3. A retractable guardrail for the top of an elevator car as described in claim 1, characterized in that, The first telescopic rod mechanism includes two third supports (41) fixedly connected to both sides of the elevator car top (1). Each third support (41) is fixedly connected to a third limiting cylinder (42) on its upper side. Each third limiting cylinder (42) is slidably connected to a third support tube (43) on its inner side. Each third support (41) on each side is fixedly connected to a first support (21) on the nearest side. Each third support tube (43) on each side is fixedly connected to a first support tube (23) on the nearest side.

4. A retractable guardrail for the top of an elevator car as described in claim 3, characterized in that, The two telescopic rod mechanism includes two second supports (31) fixedly connected to one side of the elevator car top (1). A second limiting cylinder (32) is fixedly connected to the upper side of each of the two second supports (31). A second support tube (33) is slidably connected to the inner side of each of the two second limiting cylinders (32). A sixth link (12) is fixedly connected between each of the second supports (31) and the first support (21) on the nearest side. A fifth link (11) is fixedly connected between each of the second support tubes (33) and the first support tube (23) on the nearest side.

5. A retractable guardrail for the top of an elevator car as described in claim 4, characterized in that, The positioning mechanism includes multiple positioning holes (5) opened on each of the second support tube (33) and the third support tube (43), and each of the third limiting tube (42) and the second limiting tube (32) is slidably connected with a pin (6), and the pin (6) is engaged with the positioning hole (5).

6. A retractable guardrail for the top of an elevator car as described in claim 4, characterized in that, A fourth link (10) is fixedly connected between the two first supports (21) on the side away from the second support (31), and a third link (9) is fixedly connected between the two first support tubes (23).

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