Double-switch telescopic car roof protective fence

Abstract

The utility model discloses a double-switch telescopic car roof protective guard which comprises a fixed protective guard (1), a movable protective guard (2) is connected inside the fixed protective guard (1) in an up-down sliding mode, a switch support (3) extending to the fixed protective guard (1) is arranged on the movable protective guard (2), an upper safety switch (31) is arranged on the upper portion of the switch support (3), and a lower safety switch (32) is arranged on the lower portion of the switch support (3). When the movable guardrail (2) moves upwards to the highest position, the lower safety switch (32) is in contact with the fixed guardrail (1) to be triggered, and the upper safety switch (31) is switched off; when the movable guardrail (2) moves downwards to the lowest position, the upper safety switch (31) makes contact with the fixed guardrail (1) to be triggered, and the lower safety switch (32) is switched off. The double-switch protective device has the advantages that a double-switch mode with a simple structure is adopted, and double protection is provided for the car roof protective fence.

Description

Technical Field

[0001] This utility model relates to a car roof guardrail, and more particularly to a double-switch retractable car roof guardrail. Background Technology

[0002] To protect the safety of maintenance personnel, safety railings are required on the top of elevator cars. However, to maintain a certain level of safety space and distance, the height of these railings varies depending on the specific circumstances. Because the height of the safety railings needs to be adjusted for different elevator conditions, existing elevator car top safety railings are typically retractable.

[0003] Retractable car top safety railings typically use a safety switch to detect when the railing has risen to the required maintenance height. When the railing height meets the maintenance requirements, the safety switch is triggered, cutting off the power and stopping the elevator to ensure the safety of maintenance personnel. If this safety switch malfunctions, the detection fails, reducing safety and posing a potential safety hazard. Utility Model Content

[0004] The purpose of this invention is to provide a double-switch retractable car roof guardrail. This invention features a simple double-switch structure, providing dual protection for the car roof guardrail.

[0005] The technical solution of this utility model is as follows: a double-switch retractable car roof guardrail, including a fixed guardrail, a movable guardrail that is slidably connected to the inside of the fixed guardrail, and a switch bracket extending to the fixed guardrail on the movable guardrail. An upper safety switch is provided on the upper part of the switch bracket, and a lower safety switch is provided on the lower part of the switch bracket. When the movable guardrail moves to the highest position, the lower safety switch contacts the fixed guardrail and is triggered, and the upper safety switch is disconnected. When the movable guardrail moves to the lowest position, the upper safety switch contacts the fixed guardrail and is triggered, and the lower safety switch is disconnected.

[0006] In the aforementioned dual-switch retractable car roof guardrail, the fixed guardrail includes a safety railing that contacts the upper safety switch and the lower safety switch, and the safety railing is provided with several vertically distributed hollow tubes.

[0007] In the aforementioned dual-switch retractable car roof guardrail, the movable guardrail includes a handrail connected to the switch bracket, and the handrail is provided with several movable tubes extending into the hollow tube.

[0008] In the aforementioned double-switch retractable car roof guardrail, the fixed guardrail is provided with a horizontal tie rod parallel to the safety railing, and the horizontal tie rod is provided with several elastic connectors connecting the hollow tube and the movable tube.

[0009] In the aforementioned dual-switch retractable car roof guardrail, the hollow tube is provided with a connecting hole, and the movable tube is provided with a sliding groove corresponding to the connecting hole. The upper end of the sliding groove forms an upper positioning hole, and the lower end of the sliding groove forms a lower positioning hole. When the movable tube moves, the elastic connector passes through the connecting hole and moves in the sliding groove. When the movable tube moves into position, the elastic connector connects with the upper positioning hole or the lower positioning hole.

[0010] In the aforementioned double-switch retractable car roof guardrail, the elastic connector includes a slide rod passing through a hollow tube and a movable tube. Both ends of the slide rod are provided with a first positioning nut, a washer, a locking block, and a second positioning nut in sequence from the outside to the inside. The locking block is connected to the connecting hole, the upper positioning hole, or the lower positioning hole. The hollow tube is located between the first positioning nut and the washer at one end of the slide rod, and a compression spring connected to the hollow tube is provided between the washer and the locking block at the other end of the slide rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention includes an upper safety switch and a lower safety switch connected to the elevator control system. When the car top guardrail rises to the level triggered by the lower safety switch, the upper safety switch opens, the height of the car top guardrail meets the maintenance requirements, the elevator enters maintenance mode, and the elevator stops running. When the car top guardrail descends to the level triggered by the upper safety switch, the lower safety switch opens, and the elevator enters normal operation mode. This invention uses two safety switches to provide dual protection for different heights of the car top guardrail, preventing malfunctions caused by a single switch.

[0013] The installation of the safety switch and the lower safety switch on a single switch bracket facilitates maintenance and disassembly.

[0014] Therefore, this utility model features a simple dual-switch design, providing dual protection for the car roof guardrail. Attached Figure Description

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

[0016] Figure 2 This is a structural diagram of a fixed guardrail.

[0017] Figure 3 This is a schematic diagram of the hollow tube structure.

[0018] Figure 4 This is a structural diagram of a movable guardrail.

[0019] Figure 5 This is a schematic diagram of the active tube.

[0020] Figure 6 This is a structural diagram of the switch bracket.

[0021] Figure 7 This is a schematic diagram of the structure where the movable guardrail is moved into place.

[0022] Figure 8 This is a schematic diagram of the structure where the movable guardrail is moved into place.

[0023] Figure 9 This is a structural schematic diagram of an elastic connector.

[0024] Figure 10 This is a schematic diagram of the card block structure.

[0025] The markings in the attached diagram are as follows: 1. Fixed guardrail; 11. Safety railing; 12. Hollow tube; 121. Connecting hole; 13. Horizontal tie rod; 14. Elastic connector; 2. Movable guardrail; 21. Handrail; 22. Movable tube; 221. Slide groove; 222. Upper positioning hole; 223. Lower positioning hole; 3. Switch bracket; 31. Upper safety switch; 32. Lower safety switch; 41. Slide rod; 42. First positioning nut; 43. Washer; 44. Locking block; 45. Second positioning nut; 46. Compression spring. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a triggering mechanism within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example:

[0029] like Figures 1-10 As shown, the double-switch retractable car roof guardrail includes a fixed guardrail 1, with a movable guardrail 2 slidably connected to the inside of the fixed guardrail 1. A switch bracket 3 is mounted on the movable guardrail 2, with its upper end connected to the movable guardrail 2 and its lower end extending to the fixed guardrail 1. An upper safety switch 31 is mounted on the upper part of the switch bracket 3, and a lower safety switch 32 is mounted on the lower part of the switch bracket 3. When the movable guardrail 2 moves to its highest position, the lower safety switch 32 contacts the fixed guardrail 1 and is triggered, disengaging the upper safety switch 31. When the movable guardrail 2 moves to its lowest position, the upper safety switch 31 contacts the fixed guardrail 1 and is triggered, disengaging the lower safety switch 32.

[0030] Both the upper safety switch 31 and the lower safety switch 32 are connected to the elevator control system. When the car top guardrail rises to the point where the lower safety switch 32 is triggered, the upper safety switch 31 opens, the height of the car top guardrail meets the maintenance requirements, the elevator enters the maintenance state, and the elevator stops running. When the car top guardrail descends to the point where the upper safety switch 31 is triggered, the lower safety switch 32 opens, and the elevator enters the normal operating state. This utility model uses two safety switches to provide double protection for different heights of the car top guardrail, preventing malfunctions caused by a single switch.

[0031] By mounting the upper safety switch 31 and the lower safety switch 32 on a single switch bracket 3, maintenance and disassembly are convenient.

[0032] The fixed guardrail 1 includes a safety railing 11 that is in contact with the upper safety switch 31 and the lower safety switch 32, and the safety railing 11 is provided with a plurality of vertically distributed hollow tubes 12.

[0033] The movable guardrail 2 includes a handrail 21 connected to the switch bracket 3, and the handrail 21 is provided with several movable tubes 22 extending into the hollow tube 12. When the movable guardrail 2 moves, the movable tubes 22 move up and down inside the hollow tube 12.

[0034] The fixed guardrail 1 is provided with a horizontal tie rod 13 parallel to the safety railing 11, and the horizontal tie rod 13 is provided with a number of elastic connectors 14 connecting the hollow tube 12 and the movable tube 22.

[0035] The hollow tube 12 is provided with a connecting hole 121, and the movable tube 22 is provided with a sliding groove 221 corresponding to the connecting hole 121. The upper end of the sliding groove 221 forms an upper positioning hole 222, and the lower end of the sliding groove 221 forms a lower positioning hole 223. When the movable tube 22 moves, the elastic connector 14 passes through the connecting hole 121 and moves in the sliding groove 221. When the movable tube 22 moves into position, the elastic connector 14 is connected to the upper positioning hole 222 or the lower positioning hole 223.

[0036] When the movable tube 22 moves, the horizontal tie rod 13 pulls the elastic connector 14 to loosen the movable tube 22. When the movable tube 22 moves upward into position, the lower safety switch 32 is triggered, and the elevator enters the maintenance state. The elastic connector 14 reconnects with the connecting hole 121 and the lower positioning hole 223 to fix the movable tube 22. When the movable tube 22 moves downward into position, the upper safety switch 31 is triggered, and the elevator enters the normal operation state. The elastic connector 14 reconnects with the connecting hole 121 and the upper positioning hole 222 to fix the movable tube 22.

[0037] The elastic connector 14 includes a slide rod 41 passing through the hollow tube 12 and the movable tube 22. From the outside to the inside, each end of the slide rod 41 is sequentially provided with a first positioning nut 42, a washer 43, a locking block 44, and a second positioning nut 45. The locking block 44 is connected to the connecting hole 121, the upper positioning hole 222, or the lower positioning hole 223. The hollow tube 12 is located between the first positioning nut 42 and the washer 43 at one end of the slide rod 41. A compression spring 46 connected to the hollow tube 12 is located between the washer 43 and the locking block 44 at the other end of the slide rod 41. Both the first positioning nut 42 and the second positioning nut 45 are threadedly connected to the slide rod 41. The compression spring 46 is sleeved on the slide rod 41, with one end connected to the hollow tube 12 and the other end connected to the washer 43.

[0038] When the position of the movable guardrail 2 needs to be adjusted up or down, pull the horizontal tie rod 13 outward. The horizontal tie rod 13 causes the first positioning nut 42, washer 43, locking block 44, and second positioning nut 45 to move outward as well. The compression spring 46 is compressed, causing the locking block 44 to separate from the connecting hole 121 and the upper positioning hole 222, or the connecting hole 121 and the lower positioning hole 223, allowing the movable guardrail 2 to move up and down. When the movable guardrail 2 is in place, stop pulling the horizontal tie rod 13. The horizontal tie rod 13 returns to its original position under the restoring action of the compression spring 46, and the locking block 44 reconnects to the connecting hole 121 and the lower positioning hole 223, or the connecting hole 121 and the upper positioning hole 222, fixing the movable guardrail 2. The overall operation is simple and convenient, without the need to adjust the movement relationship between each hollow tube 12 and the movable tube 22 individually, saving time and effort.

[0039] The connecting hole 121, upper positioning hole 222, and lower positioning hole 223 can be irregularly shaped, and the locking block 44 is a corresponding irregularly shaped locking block. This ensures a stable connection and prevents shaking when the locking block 44 is connected to the connecting hole 121, upper positioning hole 222, or lower positioning hole 223. Furthermore, the design of the washer 43 improves the quietness of the adjustment of the movable guardrail 2.

[0040] The parts of this utility model not described in detail are existing technologies and therefore will not be specifically described here.

Claims

1. A double-switch retractable car roof guardrail, characterized in that: The system includes a fixed guardrail (1), and a movable guardrail (2) is slidably connected inside the fixed guardrail (1). The movable guardrail (2) is provided with a switch bracket (3) extending to the fixed guardrail (1). The upper part of the switch bracket (3) is provided with an upper safety switch (31), and the lower part of the switch bracket (3) is provided with a lower safety switch (32). When the movable guardrail (2) moves up to the highest position, the lower safety switch (32) contacts the fixed guardrail (1) and is triggered, and the upper safety switch (31) is disconnected. When the movable guardrail (2) moves down to the lowest position, the upper safety switch (31) contacts the fixed guardrail (1) and is triggered, and the lower safety switch (32) is disconnected.

2. The dual-switch retractable car roof guardrail according to claim 1, characterized in that: The fixed guardrail (1) includes a safety railing (11) that is in contact with the upper safety switch (31) and the lower safety switch (32), and the safety railing (11) is provided with a number of vertically distributed hollow tubes (12).

3. The dual-switch retractable car roof guardrail according to claim 2, characterized in that: The movable guardrail (2) includes a handrail (21) connected to the switch bracket (3), and the handrail (21) is provided with a plurality of movable tubes (22) extending into the hollow tube (12).

4. The dual-switch retractable car roof guardrail according to claim 2, characterized in that: The fixed guardrail (1) is provided with a horizontal tie rod (13) parallel to the safety railing (11), and the horizontal tie rod (13) is provided with a number of elastic connectors (14) connecting the hollow tube (12) and the movable tube (22).

5. The dual-switch retractable car roof guardrail according to claim 4, characterized in that: The hollow tube (12) is provided with a connecting hole (121), and the movable tube (22) is provided with a sliding groove (221) corresponding to the connecting hole (121). The upper end of the sliding groove (221) forms an upper positioning hole (222), and the lower end of the sliding groove (221) forms a lower positioning hole (223). When the movable tube (22) moves, the elastic connector (14) passes through the connecting hole (121) and moves in the sliding groove (221). When the movable tube (22) moves into place, the elastic connector (14) is connected to the upper positioning hole (222) or the lower positioning hole (223).

6. The dual-switch retractable car roof guardrail according to claim 5, characterized in that: The elastic connector (14) includes a slide rod (41) passing through the hollow tube (12) and the movable tube (22). Both ends of the slide rod (41) are provided with a first positioning nut (42), a washer (43), a locking block (44) and a second positioning nut (45) from the outside to the inside. The locking block (44) is connected to the connecting hole (121), the upper positioning hole (222) or the lower positioning hole (223). The hollow tube (12) is located between the first positioning nut (42) and the washer (43) at one end of the slide rod (41). A compression spring (46) connected to the hollow tube (12) is provided between the washer (43) and the locking block (44) at the other end of the slide rod (41).

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