Telescopic car roof protective fence
By introducing stroke switches and limit components into the elevator car roof guardrail, automatic limit and fault alarms are realized after maintenance is completed, and the collision problems caused by the failure of the elevator car roof guardrail to meet the national standard requirements and the fault of the limit parts are solved. Improves safety and maintenance efficiency.
Patent Information
- Application Number
- CN202421314742.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The existing elevator roof guardrail cannot meet the national standard requirements if the height of the top floor of the shaft is not enough, and the elevator may crash when the limit parts fail, affecting normal operation.
A retractable top guardrail is designed, using stroke switches and limiting components to ensure that the upper guardrail assembly can be automatically limited after maintenance is completed and an alarm is issued through the buzzer in case of a failure.
With automatic limit and alarm systems, the risk of use is reduced, ensuring that the elevator avoids collisions during normal operation, and simplifying the overhaul process.
Smart Images
Figure CN222498249U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of elevators, and in particular to a retractable car top guardrail. Background Art
[0002] The guardrail on the top of the elevator car is a component installed on the top of the elevator car. As a device to protect installation and maintenance personnel, there are clear design requirements in the national standard GB / T7588.1-2020: when the horizontal clear distance between the inner edge of the guardrail handrail and the shaft wall is greater than 0.5m, the height of the elevator guardrail on the top of the elevator car should be at least 1.1m. This requirement will also affect the minimum top height of the elevator shaft, causing it to increase accordingly, resulting in some elevators with insufficient shaft top height failing to meet the national standard requirements.
[0003] The current method to deal with this situation in the market is to design the elevator car top guardrail into a retractable structure. During installation and maintenance, pull out the retractable railing so that its height meets the minimum requirement of 1.1m. After the work is completed, compress the guardrail to lower its height to ensure that even if the height of the top floor of the shaft is not enough, an elevator that meets the national standard requirements can be installed. However, when it is put into use again, if the limiter that restricts the lifting and lowering of the retractable railing fails and is not reported in time, the elevator may collide with the top floor during subsequent operation, causing failure and affecting the normal operation of the elevator, so further improvement is needed. Utility Model Content
[0004] In order to reduce the risk of using a retractable car top guardrail, the present application provides a retractable car top guardrail.
[0005] The present application provides a retractable car roof guardrail, which adopts the following technical solution:
[0006] A retractable car roof guardrail comprises a lower guardrail assembly, an upper guardrail assembly slidably connected to the lower guardrail assembly, a limit assembly for limiting the sliding of the upper guardrail assembly, and a travel switch arranged on the lower guardrail assembly, wherein when the upper guardrail assembly is in the lowest position, a push rod for touching the travel switch is provided, the travel switch is electrically connected to a control device, the control device is electrically connected to a buzzer, the travel switch feeds back an electrical signal to the control device, and the control device sends an electrical signal to the buzzer.
[0007] By adopting the above technical solution and providing a travel switch, after the inspection is completed, the upper guardrail assembly is slid toward the direction close to the guardrail assembly. When the upper guardrail assembly touches the push rod forming the switch, it is detected that the upper guardrail assembly has slid to the lowest position, and then the limit assembly is used to limit the position to complete the inspection. When the elevator is put into use later, if the upper guardrail assembly slides away from the contact of the travel switch, the travel switch is reset and an electrical signal is fed back to the control device, which sends an electrical signal to the buzzer and then sounds an alarm to promptly remind the elevator of the telescopic state at this time, so as to notify the maintenance personnel to perform maintenance and reduce the risk of using the retractable car top guardrail.
[0008] Preferably, the upper guardrail assembly includes a third cross bar and a plurality of sliding rods vertically fixed to the lower surface of the third cross bar, the lower guardrail assembly includes a first cross bar and two sliding sleeve rods vertically fixed to the two ends of the first cross bar, the sliding rod is slidably inserted in the sliding sleeve rod; the sliding sleeve rod is penetrated by a first through hole, the sliding rod is penetrated by a second through hole corresponding to the first through hole, a plurality of the first through holes are spaced apart in the length direction of the sliding sleeve rod, a plurality of the second through holes are spaced apart along the length direction of the sliding rod, and the limit assembly includes a limit pin slidably penetrated in the first through hole and the second through hole.
[0009] By adopting the above technical solution, when performing maintenance, after the sliding rod is slid to the specified height, the limit pin is slidably inserted into the first through hole and the second through hole to limit the height between the upper guardrail assembly and the lower guardrail assembly.
[0010] Preferably, the limiting latch is a bolt, and the limiting assembly further comprises a nut threadedly connected to the limiting latch.
[0011] By adopting the above technical solution, by setting the limit pin as a bolt and cooperating with a nut to fix the height between the upper guardrail assembly and the lower guardrail assembly, the possibility of shaking between the upper guardrail assembly and the lower guardrail assembly during maintenance or subsequent normal operation of the elevator is reduced, thereby reducing the risk of using the retractable car roof guardrail.
[0012] Preferably, the limit assembly further comprises a spring fixedly sleeved on the limit latch and a mounting plate for mounting the spring, the mounting plate is fixedly connected to the sliding sleeve rod, and the spring forces the limit latch to move in a direction close to the sliding sleeve rod.
[0013] By adopting the above technical solution, the limit pin is pulled to slide away from the first through hole and the second through hole so as to adjust the height between the upper guardrail assembly and the lower guardrail assembly. When fixing is required, the force on the limit pin is released, and the limit pin is slidably inserted into the first through hole and the second through hole which are arranged opposite to each other under the force of the spring. Under the action of the spring, the limit speed between the upper guardrail assembly and the lower guardrail assembly can be accelerated, thereby accelerating the speed of maintenance.
[0014] Preferably, it also includes an unlocking rope fixedly connected to the limit latch.
[0015] By adopting the above technical solution, for a plurality of limit latches, an unlocking rope is provided so as to pull the plurality of limit latches, which relatively speeds up the maintenance speed compared with pulling the limit latches one by one.
[0016] Preferably, the upper guardrail assembly also includes two fourth cross bars respectively arranged at both ends of the third cross bar, the fourth cross bars are arranged perpendicular to the third cross bar, the two fourth cross bars and one third cross bar are arranged in an N shape, and a lifting assembly is arranged in the middle of the fourth cross bar.
[0017] By adopting the above technical solution, since the existing retractable car roof guardrails are mostly integrated, at least two maintenance personnel are required to lift the surrounding guardrails at the same time during operation, which makes the operation inconvenient. At the same time, the installation accuracy is high. Once there is a slight deviation in the installation, it may cause the column to get stuck, or it may take a lot of force to pull out the guardrail column. This makes it very difficult and unsafe for one person to operate, and it requires the cooperation of multiple people to change the car roof guardrail from a compressed state to a working state.
[0018] By arranging a lifting assembly in the middle of the two fourth cross bars, the lifting assembly can be acted on so as to lift the two fourth cross bars and one third cross bar, thereby reducing the difficulty of lifting the guardrail assembly during maintenance, thereby indirectly speeding up the subsequent maintenance rate.
[0019] Preferably, the lifting assembly includes a lifting rod, and a sliding groove is provided on the surfaces of the two fourth cross bars that are close to each other, and the sliding groove extends to the upper surface of the fourth cross bar. One of the inner walls of the sliding groove is provided with a first slot for the lifting rod to slide and engage, and the two first slots extend to the surfaces of the two fourth cross bars that are close to each other.
[0020] By adopting the above technical solution, after the lifting rod is slidably inserted into the sliding groove, it is then slidably embedded in the first slot. At this time, an upward force is applied to the lifting rod to drive the upper guardrail assembly to slide. The force can be applied to the lifting rod by one person, reducing the possibility of requiring the cooperation of multiple people to lift the upper guardrail assembly to a working state.
[0021] Preferably, a second slot is formed on an end surface of the fourth cross bar away from the third cross bar, the second slot extends to the upper surface of the fourth cross bar, and the lifting rod is slidably engaged in the second slot.
[0022] By adopting the above technical solution, when the upper guardrail assembly is lifted to the working state, under the limit of the limit assembly, the height between the upper guardrail assembly and the lower guardrail assembly is temporarily constant. At this time, the lifting rod is slidably embedded in the second slot to temporarily protect the notch, thereby improving the protection effect.
[0023] Preferably, the fourth cross bar is penetrated by a fixing bolt, and the bottom inner wall of the second slot is provided with a threaded hole for threaded connection of the fixing bolt.
[0024] By adopting the above technical solution, after the subsequent maintenance is completed, the lifting rod is fixed to the fourth cross bar by fixing bolts.
[0025] In summary, the utility model has the following beneficial effects:
[0026] 1. A travel switch is provided to detect whether the upper guardrail assembly is in a compressed state, thereby reducing the risk of using the retractable car roof guardrail.
[0027] 2. By providing a lifting assembly, the lifting assembly can be acted on so as to lift the two fourth cross bars and one third cross bar, thereby reducing the difficulty of lifting the guardrail assembly during maintenance, thereby indirectly speeding up the subsequent maintenance rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;
[0029] Figure 2 yes Figure 1 A local enlarged schematic diagram of part A in FIG.
[0030] Figure 3 is a schematic diagram of the structure of the limit assembly in Example 2 of the present application;
[0031] Figure 4 It is a schematic diagram of the overall structure of Example 3 of the present application;
[0032] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part B in FIG.
[0033] Figure 6 It is a schematic diagram of the structure of the fixing bolt in the embodiment of the present application.
[0034] Explanation of the reference numerals: 1. upper guardrail assembly; 11. first cross bar; 12. connecting rod; 13. second cross bar; 14. sliding sleeve rod; 141. first through hole; 2. lower guardrail assembly; 21. third cross bar; 22. fourth cross bar; 221. slide groove; 222. first slot; 223. second slot; 23. sliding rod; 231. second through hole; 3. limit assembly; 31. limit pin; 32. nut; 33. spring; 34. unlocking rope; 4. travel switch; 5. lifting assembly; 51. fixing bolt. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-6 , further details of this application are given.
[0036] The embodiment of the present application discloses a retractable car roof guardrail.
[0037] Embodiment 1:
[0038] A retractable car roof guardrail, referring to Figure 1 , including a lower guardrail component 2, an upper guardrail component 1 slidably connected to the lower guardrail component 2, a limit component 3 for limiting the sliding of the upper guardrail component 1, and a travel switch 4 arranged on the lower guardrail component 2.
[0039] Among them, the lower guardrail assembly 2 specifically includes a first cross bar 11, a connecting rod 12, a second cross bar 13 and a sliding sleeve rod 14. In this embodiment, two first cross bars 11 and two connecting rods 12 are each provided, the two first cross bars 11 are relatively horizontally arranged, the two connecting rods 12 are arranged between the two first cross bars 11, and are spaced apart along the length direction of the first cross bars 11.
[0040] In this embodiment, ten second cross bars 13 are provided, and eight sliding sleeve rods 14 are specifically provided. The plurality of second cross bars 13 and the plurality of sliding sleeve rods 14 are symmetrically arranged at both ends of the first cross bar 11 along the middle of the first cross bar 11. Therefore, five second cross bars 13 and four sliding sleeve rods 14 are arranged on one side of the first cross bar 11. Due to the symmetrical arrangement, the connection of five second cross bars 13 and four sliding sleeve rods 14 is specifically described. In this embodiment, the length direction of the second cross bar 13 is perpendicular to the length direction of the first cross bar 11. In the direction, one of the second cross bars 13 is arranged at the same height as the first cross bar 11 located above, wherein two sliding sleeves 14 are fixedly connected to the two ends of the second cross bar 13, and then the four second sliding bars are symmetrically arranged on both sides along the axis of the second cross bar 13 at this time, and are spaced apart along the height direction of the sliding sleeves 14, and then the remaining two sliding sleeves 14 are fixedly connected to the two sides of the four second cross bars 13 to form a side block, and then the sliding sleeves 14 in the side block are fixedly connected to the first cross bar 11, so as to form a lower guardrail assembly 2.
[0041] The upper guardrail assembly 1 specifically includes a third crossbar 21, a fourth crossbar 22 and a sliding rod 23. In this embodiment, one third crossbar 21 is provided and is arranged parallel to the top of the first crossbar 11. Two fourth crossbars 22 are provided and are respectively fixed vertically to the two ends of the third crossbar 21 and arranged parallel to the side guards on both sides to form an N-shaped arrangement. In this embodiment, eight sliding rods 23 are provided, which are the same as the number of sliding sleeves 14. The upper end surface of the sliding sleeve 14 is open, and the sliding sleeve 14 is a hollow tube. The sliding rod 23 is slidably inserted in the sliding sleeve 14. Two sliding rods 23 are fixedly connected to the lower surface of the third crossbar 21 at both ends, and the remaining sliding rods 23 are fixedly connected to the lower surface of the fourth crossbar 22.
[0042] Reference Figure 1 , Figure 2 , wherein the limit assembly 3 specifically includes a limit pin 31 and a nut 32. In this embodiment, the limit pin 31 is a bolt, and the nut 32 is threadedly connected to the limit pin 31. The sliding sleeve 14 is provided with a first through hole 141 along its thickness direction. Two first through holes 141 are arranged at intervals in the length direction of the sliding sleeve 14, and are arranged near the two ends of the sliding sleeve 14. The sliding rod 23 is provided with a second through hole 231 corresponding to the first through hole 141. Two second through holes 231 are arranged at intervals in the length direction of the sliding rod 23, and are arranged near the two ends of the sliding rod 23. The limit pin 31 is used to penetrate the first through hole 141 and the second through hole 231 to limit the height between the upper guardrail assembly 1 and the lower guardrail assembly 2.
[0043] The travel switch 4 is specifically fixedly connected to the upper surface of the first cross bar 11 in the middle, the travel switch 4 is electrically connected to a control device, and the control device is electrically connected to a buzzer. When the upper guardrail assembly 1 is at the lowest position, at this time, the third cross bar 21 is used to touch the push rod of the travel switch 4, and is in a non-alarm state. When the third cross bar 21 does not touch the push rod of the travel switch 4, at this time, the travel switch 4 feeds back an electrical signal to the control device, and the control device sends an electrical signal to the buzzer, and the buzzer alarms, and is in an alarm state.
[0044] Embodiment 2:
[0045] Reference Figure 3 The difference from Example 1 is that the limit assembly 3 also includes a spring 33 fixedly mounted on the limit pin 31 and an unlocking rope 34 fixedly connected to the limit pin 31. Under normal circumstances, the spring 33 forces the limit pin 31 to move in a direction close to the sliding sleeve rod 14.
[0046] Embodiment 3:
[0047] Reference Figure 4 , Figure 5The difference from Example 1 is that a lifting component 5 is provided in the middle of the fourth cross bar 22. In this embodiment, the lifting component 5 is specifically a lifting rod. A sliding groove 221 is provided on the surfaces of the two fourth cross bars 22 that are close to each other. The sliding groove 221 extends to the upper surface of the fourth cross bar 22. One of the inner walls of the sliding groove 221 is provided with a first card groove 222 for the lifting rod to slide and engage. The two first card grooves 222 extend to the surfaces of the two fourth cross bars 22 that are close to each other.
[0048] Reference Figure 4 , Figure 6 A second slot 223 is formed on the end surface of the fourth cross bar 22 away from the third cross bar 21. The second slot 223 extends to the upper surface of the fourth cross bar 22. A fixing bolt 51 is passed through the fourth cross bar 22. A threaded hole (not shown in the figure) is formed on the bottom inner wall of the second slot 223 for threaded connection of the fixing bolt 51.
[0049] After the lifting rod is slidably inserted into the slide slot 221, it is then slidably engaged in the first engagement slot 222. At this time, an upward force is applied to the lifting rod to drive the upper guardrail assembly 1 to slide. The force can be applied to the lifting rod by one person, reducing the possibility of requiring the cooperation of multiple people to lift the upper guardrail assembly 1 to a working state. When the upper guardrail assembly 1 is in a working state, the lifting rod is slidably engaged in the second engagement slot 223 to form a temporary protection. After the inspection is completed, the limit pin 31 is pulled out of the first through hole 141 and the second through hole 231. After the upper guardrail assembly 1 is in a compressed state, the limit pin 31 is slidably engaged in the first through hole 141 and the second through hole 231 in this state.
[0050] It should be noted that the lifting assembly 5 in this embodiment can be combined with the limiting assembly 3 in Example 2 to speed up the maintenance rate.
[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A retractable car roof guardrail, characterized in that: The invention comprises a lower guardrail assembly (2), an upper guardrail assembly (1) slidably connected to the lower guardrail assembly (2), a limit assembly (3) for limiting the sliding of the upper guardrail assembly (1), and a travel switch (4) arranged on the lower guardrail assembly (2); when the upper guardrail assembly (1) is in the lowest position, a push rod is used to touch the travel switch (4); the travel switch (4) is electrically connected to a control device; the control device is electrically connected to a buzzer; the travel switch (4) feeds back an electrical signal to the control device; and the control device sends an electrical signal to the buzzer.
2. A retractable car roof guardrail according to claim 1, characterized in that: The lower guardrail assembly (2) comprises a first crossbar (11) and two sliding sleeves (14) respectively fixed vertically at two ends of the first crossbar (11); the upper guardrail assembly (1) comprises a third crossbar (21) and a plurality of sliding rods (23) fixed vertically to the lower surface of the third crossbar (21); the sliding rods (23) are slidably inserted in the sliding sleeve (14); the sliding sleeve (14) is provided with a first through hole (141); the sliding rod (23) is provided with a second through hole (231) corresponding to the first through hole (141); a plurality of the first through holes (141) are arranged at intervals in the length direction of the sliding sleeve (14); a plurality of the second through holes (231) are arranged at intervals in the length direction of the sliding rod (23); and the limit assembly (3) comprises a limit pin (31) slidably inserted in the first through hole (141) and the second through hole (231).
3. A retractable car roof guardrail according to claim 2, characterized in that: The limiting latch (31) is a bolt, and the limiting assembly (3) further comprises a nut (32) threadedly connected to the limiting latch (31).
4. A retractable car roof guardrail according to claim 2, characterized in that: The limiting assembly (3) further comprises a spring (33) fixedly sleeved on the limiting latch (31), wherein the spring (33) forces the limiting latch (31) to move in a direction close to the sliding sleeve rod (14).
5. The retractable car roof guardrail according to claim 4, characterized in that: It also includes an unlocking rope (34) fixedly connected to the limiting latch (31).
6. The retractable car roof guardrail according to claim 2, characterized in that: The upper guardrail assembly (1) further comprises two fourth cross bars (22) respectively arranged at the two ends of the third cross bar (21), the fourth cross bars (22) being arranged perpendicular to the third cross bar (21), the two fourth cross bars (22) and the one third cross bar (21) being arranged in an N-shape, and a lifting assembly (5) being arranged in the middle of the fourth cross bar (22).
7. The retractable car roof guardrail according to claim 6, characterized in that: The lifting assembly (5) comprises a lifting rod, and a sliding groove (221) is provided on the surfaces of the two fourth cross bars (22) close to each other, and the sliding groove (221) extends to the upper surface of the fourth cross bar (22), and one of the inner side walls of the sliding groove (221) is provided with a first card groove (222) for the lifting rod to slide and engage, and the two first card grooves (222) extend to the surfaces of the two fourth cross bars (22) close to each other.
8. The retractable car roof guardrail according to claim 7, characterized in that: The fourth cross bar (22) is provided with a second slot (223) on an end surface away from the third cross bar (21), the second slot (223) extends to the upper surface of the fourth cross bar (22), and the lifting rod is slidably engaged in the second slot (223).
9. The retractable car roof guardrail according to claim 8, characterized in that: The fourth crossbar (22) is provided with a fixing bolt (51), and the bottom inner wall of the second clamping groove (223) is provided with a threaded hole for threaded connection of the fixing bolt (51).