A fall arrest device for an elevator counterweight

Abstract

The utility model discloses a kind of anti-falling devices for elevator counter-rope wheel, including mounting beam (1), the bottom two sides of mounting beam (1) are fixedly connected with wheel shaft (3) by U-type bolt (2), the middle part of wheel shaft (3) is rotatably connected with counter-rope wheel (4), the bottom of mounting beam (1) outside U-type bolt (2) is connected with anti-falling plate (5), the middle part of anti-falling plate (5) is equipped with the anti-falling hole (6) for wheel shaft (3) to pass through, and there is gap between the bottom surface of wheel shaft (3) and the lower end surface of anti-falling hole (6);The outer side of the both ends of wheel shaft (3) is equipped with guard plate (7), and one end of guard plate (7) is fixedly connected in the end of wheel shaft (3), and the other end of guard plate (7) is fixedly connected mounting beam (1).The utility model can carry out double protection to elevator counter-rope wheel, reduce the possibility of elevator counter-rope wheel falling.

Description

Technical Field

[0001] This utility model relates to an installation device for an elevator anti-fall device, and in particular to an anti-fall device for an elevator anti-fall device. Background Technology

[0002] Currently, the common installation method for the elevator deflector pulley on the mounting beam at the top of the car frame or counterweight device involves connecting the middle of the deflector pulley to the axle via a bearing. The two ends of the axle extend to the sides of the deflector pulley and are fixed to the top of the mounting beam using U-bolts or clamps. The U-bolts or clamps are used to support and limit the axle, preventing the deflector pulley from falling. However, this installation method directly links the stability of the elevator deflector pulley to the structural and connection strength of the U-bolts or clamps. If the structure itself or its connecting parts deform or experience fatigue fracture, the deflector pulley may loosen and fall off, posing a significant safety hazard.

[0003] Therefore, a fixing device is needed to improve the installation stability of the elevator anti-cord pulley. Utility Model Content

[0004] The purpose of this invention is to provide a fall prevention device for elevator deflector pulleys. It provides dual protection for the elevator deflector pulley, reducing the possibility of it falling.

[0005] The technical solution of this utility model is as follows: A fall prevention device for an elevator anti-fall pulley includes a mounting beam. A wheel axle is fixedly connected to both sides of the bottom of the mounting beam via U-bolts. An anti-fall pulley is rotatably connected to the middle of the wheel axle. A fall prevention plate is connected to the bottom of the mounting beam outside the U-bolts. A fall prevention hole for the wheel axle to pass through is provided in the middle of the fall prevention plate. A gap is left between the bottom surface of the wheel axle and the lower end surface of the fall prevention hole. Protective plates are provided on the outer sides of both ends of the wheel axle. One end of the protective plate is fixedly connected to the end of the wheel axle, and the other end of the protective plate is fixedly connected to the mounting beam.

[0006] In the aforementioned anti-fall device for an elevator anti-fall wheel, one end of the protective plate is connected to the wheel axle via a first fixing bolt, and the other end of the protective plate is connected to the mounting beam via a second fixing bolt.

[0007] In the aforementioned anti-fall device for an elevator anti-rope pulley, the protective plate has a Z-shaped cross-section. One end of the protective plate is connected to the outer end face of the wheel axle by a first fixing bolt, and the other end of the protective plate is connected to the side wall of the mounting beam by a second fixing bolt.

[0008] In the aforementioned anti-fall device for an elevator anti-rope pulley, the protective plate has an L-shaped cross-section. One end of the protective plate is connected to the outer end face of the wheel axle by a first fixing bolt, and the other end of the protective plate is connected to the lower end of the side wall of the mounting beam by a second fixing bolt.

[0009] In the aforementioned anti-fall device for an elevator anti-fall sheave, a sensing plate is bolted to the outer side of the protective plate via a first fixing bolt. The end of the sensing plate extends to below the wheel axle and is connected to a micro switch, with a gap between the micro switch and the wheel axle.

[0010] In the aforementioned anti-fall device for an elevator anti-fall sheave, the upper end of the anti-fall plate is connected to the mounting beam via a third fixing bolt, and the middle of the anti-fall plate has an opening for a U-bolt to pass through.

[0011] In the aforementioned anti-fall device for an elevator anti-fall sheave, the bottom of the anti-fall plate is detachably connected to a limiting screw, the end of which extends to the outer side wall of the anti-fall sheave.

[0012] Compared with the prior art, this utility model has the following characteristics: (1) Based on the U-bolt, this utility model connects the end of the wheel axle to the mounting beam via a protective plate, so that the protective plate can work with the U-bolt to achieve double protection for the wheel axle, thereby reducing the possibility of the elevator anti-rope wheel falling; on this basis, by limiting the shape and installation position of the protective plate, it can be applied to mounting beams with different shapes, thereby improving the installation stability of this utility model. (2) Through the structural cooperation of the anti-fall plate and the anti-fall hole, it can also provide temporary support when the wheel axle is loose and falls, thereby preventing the finger joint of the anti-rope wheel from falling after the fixed structure is damaged, and also serving as a warning function to remind that there is a risk of the anti-rope wheel falling, thereby improving the safety of this utility model. (3) By combining the sensor plate and the micro switch, the micro switch can be triggered when the wheel axle shifts downward, and the micro switch will issue an alarm, so that maintenance personnel can handle the situation before the wheel axle falls completely, thereby improving the safety of this utility model. Therefore, this utility model can provide double protection for the elevator deflector, reducing the possibility of the elevator deflector falling. Attached Figure Description

[0013] Figure 1 This is a front view of Example 1; Figure 2 This is a side view of Embodiment 1; Figure 3 This is an external view of Example 2; Figure 4 This is an external view of Example 3.

[0014] The markings in the attached diagram are: 1-mounting beam, 2-U-bolt, 3-axle, 4-reverse rope wheel, 5-fall protection plate, 6-fall protection hole, 7-protective plate, 8-sensor plate, 9-micro switch, 10-limit screw, 11-first fixing bolt. Detailed Implementation

[0015] 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.

[0016] Example 1. A fall prevention device for an elevator anti-fall sheave, configured as follows: Figure 1-2 As shown, the system includes a mounting beam 1. A wheel axle 3 is fixedly connected to both sides of the bottom of the mounting beam 1 via U-bolts 2. A reverse rope wheel 4 is rotatably connected to the middle of the wheel axle 3. A fall arrestor plate 5 is detachably connected to the bottom of the mounting beam 1 outside the U-bolts 2. A fall arrestor hole 6 is provided in the middle of the fall arrestor plate 5 for the wheel axle 3 to pass through. A gap is left between the bottom surface of the wheel axle 3 and the lower end surface of the fall arrestor hole 6. Protective plates 7 are provided on the outer sides of both ends of the wheel axle 3. One end of the protective plate 7 is fixedly connected to the end of the wheel axle 3, and the other end of the protective plate 7 is fixedly connected to the mounting beam 1.

[0017] One end of the protective plate 7 is connected to the wheel axle 3 via the first fixing bolt 11, and the other end of the protective plate 7 is connected to the mounting beam 1 via the second fixing bolt.

[0018] When the side wall of the mounting beam 1 is C-shaped, the cross-sectional shape of the protective plate 7 is L-shaped. One end of the protective plate 7 is connected to the outer end face of the wheel axle 3 by the first fixing bolt 11, and the other end of the protective plate 7 is connected to the lower end of the side wall of the mounting beam 1 by the second fixing bolt.

[0019] The number of protective plates 7 and anti-fall plates 5 are two, and they are symmetrically arranged on the left and right sides of the anti-rope wheel 4. The protective plates 7 and anti-fall plates 5 on one side of the anti-rope wheel 4 are located on the left and right sides of the U-bolt 2, respectively.

[0020] The fall arrestor plate 5 is L-shaped. The upper end of the fall arrestor plate 5 is connected to the mounting beam 1 via a third fixing bolt. The middle part of the fall arrestor plate 5 has an opening for the U-bolt 2 to pass through.

[0021] The bottom of the fall arrestor 5 is detachably connected to a limiting screw 10. The end of the limiting screw 10 extends to the outside of the side wall of the anti-rope wheel 4. The operator can adjust the distance between the limiting screw 10 and the side wall of the anti-rope wheel 4 to control the lateral limiting accuracy of the anti-rope wheel 4.

[0022] In this embodiment, the two sides of the axle 3 are connected to the mounting beam 1 via U-bolts 2, and the two ends of the axle 3 are connected to the mounting beam 1 via protective plates 7. This allows the U-bolts 2 and protective plates 7 to achieve double fixation of the axle 3, thereby reducing the possibility of the axle 3 loosening and falling. Furthermore, by installing anti-fall plates 5 on the lower sides of the axle 3, temporary support can be provided through the anti-fall holes 6 in the event of a fall. This serves two purposes: firstly, it prevents the axle 3 from falling directly; secondly, it acts as a warning, indicating that the anti-fall wheel 4 is at risk of falling and requires attention.

[0023] Example 2. A fall prevention device for an elevator anti-fall sheave, configured as follows: Figure 3 As shown, in this embodiment, based on embodiment 1, a sensing plate 8 is bolted to the outer side of the protective plate 7 via a first fixing bolt 11. The end of the sensing plate 8 extends to the bottom of the wheel axle 3 and is connected to a micro switch 9. A gap is left between the micro switch 9 and the wheel axle 3.

[0024] Building upon Example 1, this example connects a microswitch 9 to the outside of the protective plate 7 via a sensing plate 8. This allows the microswitch 9 to sense the potential fall of the axle 3. When the axle 3 shifts downwards, its bottom surface contacts and triggers the microswitch 9, which then issues an alarm, alerting elevator maintenance personnel to the risk of axle 3 falling. This further reduces the risk of axle 3 falling directly and improves elevator safety. Furthermore, operators can adjust the trigger height of the microswitch as needed, thereby controlling the trigger height of the axle 3 and enhancing the triggering effect of the microswitch 9.

[0025] Example 3. A fall prevention device for an elevator anti-fall sheave, configured as follows: Figure 4 As shown, the system includes a mounting beam 1. A wheel axle 3 is fixedly connected to both sides of the bottom of the mounting beam 1 via U-bolts 2. A reverse rope wheel 4 is rotatably connected to the middle of the wheel axle 3. A fall arrestor plate 5 is detachably connected to the bottom of the mounting beam 1 outside the U-bolts 2. A fall arrestor hole 6 is provided in the middle of the fall arrestor plate 5 for the wheel axle 3 to pass through. A gap is left between the bottom surface of the wheel axle 3 and the lower end surface of the fall arrestor hole 6. Protective plates 7 are provided on the outer sides of both ends of the wheel axle 3. One end of the protective plate 7 is fixedly connected to the end of the wheel axle 3, and the other end of the protective plate 7 is fixedly connected to the mounting beam 1.

[0026] One end of the protective plate 7 is connected to the wheel axle 3 via the first fixing bolt 11, and the other end of the protective plate 7 is connected to the mounting beam 1 via the second fixing bolt.

[0027] When the side wall of the mounting beam 1 is flat, the cross-sectional shape of the protective plate 7 is Z-shaped. One end of the protective plate 7 is connected to the outer end face of the wheel axle 3 by the first fixing bolt 11, and the other end of the protective plate 7 is connected to the side wall of the mounting beam 1 by the second fixing bolt.

[0028] The number of protective plates 7 and fall arrest plates 5 are both two and are symmetrically arranged on the left and right sides of the anti-rope wheel 4. The fall arrest plate 5 and protective plate 7 on one side of the anti-rope wheel 4 are arranged sequentially on the outside of the U-bolt 2.

[0029] The fall arrestor plate 5 is flat in shape. The upper end of the fall arrestor plate 5 is connected to the mounting beam 1 via a third fixing bolt. The middle part of the fall arrestor plate 5 has an opening for the U-bolt 2 to pass through.

[0030] The bottom of the fall arrestor 5 is detachably connected to a limiting screw 10. The end of the limiting screw 10 extends to the outside of the side wall of the anti-rope wheel 4. The operator can adjust the distance between the limiting screw 10 and the side wall of the anti-rope wheel 4 to control the lateral limiting accuracy of the anti-rope wheel 4.

[0031] Compared with Embodiment 1, this embodiment targets the installation beam 1 with a planar sidewall structure. By adjusting the shape and installation position of the fall arrestor 5 and the protective plate 7, the fall arrestor 5 and the protective plate 7 are stably installed on the installation beam 1, thereby improving the installation stability of this utility model.

Claims

1. A fall prevention device for an elevator anti-fall sheave, comprising a mounting beam (1), with axles (3) fixedly connected to both sides of the bottom of the mounting beam (1) by U-bolts (2), and an anti-fall sheave (4) rotatably connected to the middle of the axle (3), characterized in that: The bottom of the mounting beam (1) on the outside of the U-bolt (2) is connected to a fall arrestor plate (5). The middle part of the fall arrestor plate (5) is provided with a fall arrestor hole (6) for the wheel axle (3) to pass through. There is a gap between the bottom surface of the wheel axle (3) and the lower end surface of the fall arrestor hole (6). The outer sides of both ends of the wheel axle (3) are provided with protective plates (7). One end of the protective plate (7) is fixedly connected to the end of the wheel axle (3), and the other end of the protective plate (7) is fixedly connected to the mounting beam (1).

2. The anti-fall device for an elevator anti-fall sheave according to claim 1, characterized in that: One end of the protective plate (7) is connected to the wheel axle (3) via the first fixing bolt (11), and the other end of the protective plate (7) is connected to the mounting beam (1) via the second fixing bolt.

3. A fall prevention device for an elevator anti-fall sheave according to claim 2, characterized in that: The protective plate (7) has a Z-shaped cross-section. One end of the protective plate (7) is connected to the outer end face of the wheel axle (3) by the first fixing bolt (11), and the other end of the protective plate (7) is connected to the side wall of the mounting beam (1) by the second fixing bolt.

4. A fall prevention device for an elevator anti-fall sheave according to claim 2, characterized in that: The protective plate (7) has an L-shaped cross-section. One end of the protective plate (7) is connected to the outer end face of the wheel axle (3) by the first fixing bolt (11), and the other end of the protective plate (7) is connected to the lower end of the side wall of the mounting beam (1) by the second fixing bolt.

5. A fall prevention device for an elevator anti-fall sheave according to claim 3 or 4, characterized in that: The outer side of the protective plate (7) is bolted to a sensing plate (8) by a first fixing bolt (11). The end of the sensing plate (8) extends to the bottom of the wheel axle (3) and is connected to a micro switch (9). There is a gap between the micro switch (9) and the wheel axle (3).

6. A fall prevention device for an elevator anti-fall sheave according to claim 1, characterized in that: The upper end of the fall arrestor plate (5) is connected to the mounting beam (1) via a third fixing bolt, and the middle part of the fall arrestor plate (5) is provided with an opening for the U-bolt (2) to pass through.

7. A fall prevention device for an elevator anti-fall sheave according to claim 6, characterized in that: The bottom of the fall arrestor (5) is detachably connected to a limiting screw (10), the end of which extends to the outside of the side wall of the anti-rope wheel (4).

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