Coupling type automatic flush push-through boot switch device

Abstract

The utility model discloses a kind of coupling type automatic flat push hole cover plate switch device, device includes driving rack, cover plate switch auxiliary mechanism, personnel emergency operating mechanism, cover plate device and safety control system.Driving rack includes upper and lower driving rack installed in the both sides of climbing device, the power transmission of upper and lower operation of climbing device can be given to cover plate switch auxiliary mechanism.Cover plate switch auxiliary mechanism is driven by the transmission of gear, bevel gear, transmission bevel gear and screw member, power is converted into the horizontal flat push movement of cover plate, realizes automatic opening and closing.Personnel emergency operating mechanism is used for manual operation when automatic system fails.Safety control system is alarmed and links climbing device shutdown when abnormal by monitoring cover plate position.The utility model does not need external power, compact structure, high degree of automation, can effectively eliminate personnel edge operation risk, and guarantee hole area operation safety.

Description

Technical Field

[0001] This utility model relates to the field of orifice safety protection technology, specifically a coupled automatic horizontal push orifice cover switch device. Background Technology

[0002] In the daily operation and maintenance of water conservancy, hydropower, and construction industries, workers often need to pass through equipment openings. These openings are usually equipped with covers for safety. When climbing devices are installed at the openings, the covers need to be opened and closed before and after their operation.

[0003] Currently, the most common switching methods are manual operation and electric induction. Manual operation requires a dedicated person to manually open and close the cover at the edge of the opening, which is not only inefficient but also exposes the operator to the risk of falling from a height. While electric induction avoids manual operation near the edge, it requires additional power lines, sensors, and actuators, resulting in a complex system and higher costs. Furthermore, the actuator often occupies valuable space at the opening, potentially creating steps or obstructions that affect safe passage for personnel.

[0004] Therefore, how to achieve a safe, efficient, and automated orifice cover switch device without relying on external power or adding complex electrical systems has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a coupled automatic flat-push orifice cover switch device, which receives the running power of the climbing device itself to drive the cover to automatically complete the opening and closing action, without the need for additional power source and complex sensing control system, thereby simplifying the structure and reducing cost and safety risks.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a coupled automatic flat-push orifice cover switch device, including a drive rack, a cover switch auxiliary mechanism, a personnel emergency operation mechanism, a cover device and a safety control system; The cover plate switch auxiliary mechanism is connected to the drive rack and pinion transmission mechanism; The personnel emergency operation mechanism and the cover plate switch auxiliary mechanism can be selectively engaged; The cover plate device is connected to the output end of the cover plate switch auxiliary mechanism; The safety control system is located near the cover plate device and is used to monitor the position of the cover plate device; The drive rack is mounted on the external climbing device, which can transmit the up-and-down movement power of the climbing device to the cover switch auxiliary mechanism, thereby driving the cover device to perform opening or closing actions.

[0007] In a preferred embodiment, the drive rack includes an upper drive rack and a lower drive rack; The upper drive rack and lower drive rack are fixedly installed on both sides of the climbing device.

[0008] In a preferred embodiment, the cover plate switch auxiliary mechanism includes a base, an input shaft, a gear, a bevel gear, a transmission bevel gear, a connecting rod, a lead screw, a lead screw cover plate drive connector, and a synchronous connecting shaft. The base includes an upper base and a lower base; The input shaft includes an upper input shaft and a lower input shaft, which are rotatably mounted on the base; The gears include an upper gear fixedly mounted on the upper input shaft and a lower gear fixedly mounted on the lower input shaft. The upper gear meshes with the upper drive rack, and the lower gear meshes with the lower drive rack.

[0009] In a preferred embodiment, the bevel gear includes an upper bevel gear installed in the upper base and a lower bevel gear installed in the lower base; The transmission bevel gear includes an upper transmission bevel gear that meshes with an upper bevel gear and a lower transmission bevel gear that meshes with a lower bevel gear; The connecting rod includes an upper connecting rod connected to the upper transmission bevel gear and a lower connecting rod connected to the lower transmission bevel gear.

[0010] In a preferred embodiment, the upper bevel gear includes a first bevel gear mounted on the upper input shaft and a second bevel gear mounted on the end of the first lead screw; The lower bevel gear includes a third bevel gear mounted on the lower input shaft and a fourth bevel gear mounted on the end of the second lead screw; The upper transmission bevel gear includes a first transmission bevel gear that meshes with the first bevel gear, and a second transmission bevel gear that is coaxially arranged with the first transmission bevel gear (251-1) and meshes with the second bevel gear; The lower transmission bevel gear includes a third transmission bevel gear that meshes with the third bevel gear, and a fourth transmission bevel gear that is coaxially arranged with the third transmission bevel gear (252-1) and meshes with the fourth bevel gear.

[0011] In a preferred embodiment, the lead screw includes a first lead screw and a second lead screw, and the lead screw is connected to the connecting rod via a transmission bevel gear; The lead screw cover plate drive connector is sleeved on the lead screw and connected to the cover plate device. The synchronous coupling shaft is equipped with a first synchronous bevel gear and a second synchronous bevel gear. The first synchronous bevel gear can mesh with the second bevel gear, and the second synchronous bevel gear can mesh with a fourth bevel gear. It can connect a first lead screw and a second lead screw to achieve synchronous rotation of the two.

[0012] In a preferred embodiment, the upper base is provided with a first clearance groove, a first receiving drive component mounting hole group, a first intermediate transmission drive component mounting hole group, a first cover plate switch actuator clearance groove, and a cover plate switch actuator mounting hole; The lower base is provided with a second clearance groove, a second receiving drive component mounting hole group, a second intermediate transmission drive component mounting hole group, a second cover plate switch actuator clearance groove, and a cover plate switch actuator mounting hole.

[0013] In a preferred embodiment, the personnel emergency operation mechanism includes an operating handwheel, an operating shaft, and a manual bevel gear; One end of the operating shaft is connected to the operating handwheel, and the other end is provided with a manual bevel gear. The manual bevel gear selectively meshes with the bevel gear or transmission bevel gear in the cover plate switch auxiliary mechanism.

[0014] In a preferred embodiment, the cover plate device includes a support track, a cover plate, and a sensing rod; The support rail is fixedly installed around the hole; The cover plate is supported on the support rail by rollers, and the cover plate is provided with a mounting hole for the cover plate switch auxiliary mechanism, which is used to connect to the output end of the cover plate switch auxiliary mechanism. The sensing rod is mounted on the cover plate.

[0015] In a preferred embodiment, the safety control system is a position sensor, which is installed at both ends of the support rail and used to detect the position of the sensing rod; The safety control system issues an alarm signal and sends a stop signal to the control system of the climbing device when the cover plate fails to reach the predetermined open or close position.

[0016] The coupled automatic sliding orifice cover switch device provided by this utility model has the following beneficial effects by adopting the above structure: (1) The kinetic energy of the climbing device itself moving up and down is used as the power source. Through the coupling transmission of the drive rack and the cover plate switch auxiliary mechanism, the cover plate device is directly driven to complete the switch. This eliminates the steps and costs of laying a separate power line and installing an electric actuator for the cover plate. The system structure is simpler, avoiding failures caused by electrical component failures. The system has high reliability and realizes the recycling of energy, making it more energy-efficient and environmentally friendly. (2) The entire transmission mechanism is integrated on the base. The cover plate device moves horizontally on the support track by rollers. It does not require the reserved flipping space as in the hinged cover plate structure, and also avoids the formation of steps or significant reduction of effective space in the opening area, thus providing sufficient protection for the safe passage of personnel. (3) It eliminates the risk of falling when operators manually operate the cover plate near the edge. By relying on the safety control system to monitor the position of the sensing rod in real time, it can issue an alarm in time and link the climbing device to stop when the cover plate is not in place, thus forming active safety protection. In addition, the personnel emergency operation mechanism can provide a manual solution when the automatic system fails, ensuring the redundancy of the device function and the safety of operation in emergency situations. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the installation of the drive rack in this utility model.

[0018] Figure 2 This is a partial schematic diagram of the installation of the drive rack in this utility model.

[0019] Figure 3 This is a schematic diagram of the upper base mechanism in this utility model.

[0020] Figure 4 This is a schematic diagram of the lower base mechanism in this utility model.

[0021] Figure 5 This is a schematic diagram of the cover plate switch auxiliary mechanism in this utility model.

[0022] Figure 6 This is a schematic diagram of the personnel emergency operation mechanism in this utility model.

[0023] Figure 7 This is a schematic diagram of the cover plate device in this utility model.

[0024] Figure 8 This is a schematic diagram of the logic for the automatic opening and closing of the orifice cover plate driven by the climbing device itself in this utility model.

[0025] Figure 9 This is a field application diagram of the present invention.

[0026] Figure 10 This is a structural diagram of the overall device of this utility model.

[0027] In the diagram: Hole 01, Climbing device 02, Climbing device track 03, Drive rack 11, Upper drive rack 111, Lower drive rack 112, Cover switch auxiliary mechanism 2, Base 21, Upper base 211, First clearance groove 211-1, First receiving drive component mounting hole group 211-2, First intermediate transmission drive component mounting hole group 211-3, First cover switch actuator clearance groove 211-4, Cover switch actuator mounting hole 21 1-5, lower base 212, second clearance groove 212-1, second receiving drive component mounting hole group 212-2, second intermediate transmission drive component mounting hole group 212-3, second cover plate switch actuator clearance groove 212-4, cover plate switch actuator mounting hole 212-5, input shaft 22, gear 23, upper gear 231, lower gear 232, bevel gear 24, upper bevel gear 241, first bevel gear 241-1, the... Two bevel gears 241-2, lower bevel gear 242, third bevel gear 242-1, fourth bevel gear 242-2, reversing bevel gear 25, upper reversing bevel gear 251, first reversing bevel gear 251-1, second reversing bevel gear 251-2, first synchronizing bevel gear 251-3, lower reversing bevel gear 252, third reversing bevel gear 252-1, fourth reversing bevel gear 252-2, second synchronizing bevel gear 252-3, connecting rod 26, upper connecting rod 261, lower connecting rod 262, lead screw 27, first lead screw 271, second lead screw 272, lead screw cover plate drive connector 28, synchronous connecting shaft 29, personnel emergency operation mechanism 3, operating handle 31, operating shaft 32, manual bevel gear 33, cover plate device 4, support rail 41, cover plate 42, cover plate switch auxiliary mechanism mounting hole 42-1, roller 43, sensing rod 44, safety control system 5. Detailed Implementation

[0028] This utility model provides a coupled automatic horizontal push orifice cover switch device, the core of which is to convert the vertical movement of the climbing device 02 into the horizontal opening and closing movement of the cover 42 through pure mechanical transmission, thereby realizing automatic safety protection of the orifice.

[0029] See Figure 1 , Figure 2 , Figure 9 and Figure 10 The device mainly includes a drive rack 11, a cover plate switching auxiliary mechanism 2, a personnel emergency operation mechanism 3, a cover plate device 4, and a safety control system 5, wherein: The drive rack 11 is the power input part of this utility model. For example... Figure 1 and Figure 2As shown, it includes an upper drive rack 111 and a lower drive rack 112. These two racks are fixedly installed on the support frames on both sides of the climbing device 02 body by welding or other reliable methods. The length L of the upper drive rack 111 and the lower drive rack 112 needs to be calculated to ensure that they can fully engage with the cover plate switch auxiliary mechanism 2 during the operation of the climbing device 02, so as to complete the entire stroke required for the cover plate 42 to go from fully closed to fully open.

[0030] The cover plate switch auxiliary mechanism 2 is the core of power transmission and conversion; see reference. Figure 3 , Figure 4 , Figure 5 and Figure 10 ,in: The base 21 serves as the installation foundation for the entire mechanism. It includes an upper base 211 and a lower base 212, which are fixed above and below the hole 01 respectively by expansion bolts or embedded parts. The specific height of the upper gear 231 inside the upper base 211 should be such that the cover plate is fully open before the climbing device 02 carrying personnel enters the hole or only begins to close after the cover plate has fully exited the hole. The specific height should be ≥L + △L (safety height) m, where the safety height △L is the stopping height of the climbing device 02 after the cover plate is fully open when it descends. The specific height of the lower gear 232 inside the lower base 212 should be such that the cover plate only begins to close after all personnel and equipment have entered the hole or only begins to open before the cover plate is exiting the hole. The specific height should be ≥L + 2.5 m.

[0031] The upper base 211 is provided with a first clearance groove 211-1, a first receiving drive component mounting hole group 211-2, a first intermediate transmission drive component mounting hole group 211-3, a first cover plate switch actuator clearance groove 211-4, and a cover plate switch actuator mounting hole 211-5.

[0032] The lower base 212 is provided with a second clearance groove 212-1, a second receiving drive component mounting hole group 212-2, a second intermediate transmission drive component mounting hole group 212-3, a second cover plate switch actuator clearance groove 212-4, and a cover plate switch actuator mounting hole 212-5.

[0033] These slots and holes are used for precise positioning and installation of subsequent transmission components, and to provide the necessary space for their movement.

[0034] The input shaft 22 is mounted on the base 21 via a bearing housing. The gear 23 is fixedly mounted on the input shaft 22, specifically comprising an upper gear 231 meshing with the upper drive rack 111 and a lower gear 232 meshing with the lower drive rack 112. When the climbing device 02 moves up and down, the drive racks 111 and 112 will drive the gear 23 and the input shaft 22 to rotate.

[0035] The bevel gear 24 is also fixedly mounted on the input shaft 22, and includes an upper bevel gear 241 and a lower bevel gear 242. The upper bevel gear 241 is composed of a first bevel gear 241-1 and a second bevel gear 241-2; the lower bevel gear 242 is composed of a third bevel gear 242-1 and a fourth bevel gear 242-2.

[0036] The bevel gear 24 meshes with the transmission bevel gear 25, which includes an upper transmission bevel gear 251 and a lower transmission bevel gear 252. The upper transmission bevel gear 251 consists of a first transmission bevel gear 251-1 and a second transmission bevel gear 251-2; the lower transmission bevel gear 252 consists of a third transmission bevel gear 252-1 and a fourth transmission bevel gear 252-2.

[0037] The bevel gear 25 is fixedly mounted on the connecting rod 26, which is correspondingly divided into an upper connecting rod 261 and a lower connecting rod 262. The meshing of the bevel gear set converts the vertical plane rotational motion of the input shaft 22 into the horizontal plane rotational motion of the connecting rod 26.

[0038] The horizontal rotation of the connecting rod 26 drives the lead screw 27 to rotate again through the meshing of another set of bevel gears. The lead screw 27 includes a first lead screw 271 and a second lead screw 272. The lead screw cover plate drive connector 28 (such as a nut) is sleeved on the lead screw 27 and connected to the cover plate device 4. To ensure synchronous movement on both sides of the cover plate 42, linkage is achieved through a synchronous connecting shaft 29. The synchronous connecting shaft 29 is equipped with a first synchronous bevel gear 251-3 and a second synchronous bevel gear 252-3. The first synchronous bevel gear 251-3 can mesh with the second bevel gear 241-2, and the second synchronous bevel gear 252-3 can mesh with the fourth bevel gear 242-2. This connects the first lead screw 271 and the second lead screw 272, enabling their synchronous rotation.

[0039] like Figure 6 As shown, the emergency operation mechanism 3 mainly consists of an operating handwheel 31, an operating shaft 32, and a manual bevel gear 33. In case of automatic system failure or maintenance, the operator can insert the operating handwheel 31 into the operating shaft 32, so that the manual bevel gear 33 meshes with any set of bevel gears in the cover switch auxiliary mechanism 2 (such as the upper bevel gear 241 or the lower bevel gear 242). By manually cranking the handle, the entire transmission system can be driven to manually open or close the cover 42.

[0040] like Figure 7As shown, the cover plate device 4 includes a support rail 41, a cover plate 42, rollers 43, and a sensing rod 44. The support rail 41 is fixedly installed around the perimeter of the hole 01. The cover plate 42 is typically made of multiple strip steel plates hinged together, and multiple rollers 43 are installed at its bottom, allowing it to slide smoothly horizontally on the support rail 41. The front end of the cover plate 42 is machined with a cover plate switch auxiliary mechanism mounting hole 42-1 for hinged connection with the lead screw cover plate drive connector 28, thereby converting the rotational motion of the lead screw 27 into the linear motion of the cover plate 42. The sensing rod 44 is fixedly installed on the cover plate 42 for cooperation with the safety control system 5.

[0041] The safety control system 5 mainly consists of a travel detection device 52 (a proximity switch can be selected), which is installed at both ends of the support rail 41, corresponding to the fully open and fully closed positions of the cover plate 42. When the cover plate 42 moves, the sensing rod 44 on it moves accordingly. If the cover plate 42 fails to reach the predetermined position within the specified travel, the travel detection device will detect the abnormal state and transmit the signal to the control module 54 for processing. Upon receiving the signal, the control module 54 immediately triggers the audible and visual alarm 53 and simultaneously sends this fault signal to the control system of the climbing device 02, forcing the climbing device 02 to stop operating until the fault is cleared, thus forming a critical safety interlock barrier.

[0042] The working principle of the coupled automatic sliding orifice cover switch device disclosed in this embodiment is as follows: 1. The climbing device 02 is powered down from the upper parking point.

[0043] 2. The upper drive rack 111 begins to mesh with the upper gear 231 at position H1, driving the upper input shaft 221 to rotate.

[0044] 3. The power is transmitted through the upper bevel gear 241, the upper transmission bevel gear 251, the upper connecting rod 261, and the synchronous connecting shaft 29, and finally drives the lead screw 27 to rotate, so that the lead screw cover plate drive connector 28 drives the cover plate 42 to move in the "open" direction.

[0045] 4. The climbing device 02 continues to descend. When the upper drive rack 111 descends to position H2, it meshes and disengages with the upper gear 231, and the cover plate 42 is fully opened. After the cover plate stroke detection device 52 confirms, the climbing device 02 continues to descend into the hole.

[0046] 5. When the climbing device 02 descends to position H4 below the orifice, the lower drive rack 112 begins to mesh with the lower gear 232.

[0047] 6. Power is transmitted through the lower bevel gear 242, the lower transmission bevel gear 252, the lower connecting rod 262, and the synchronous connecting shaft 29, driving the lead screw 27 to rotate in the opposite direction, causing the cover plate 42 to move in the "closed" direction.

[0048] 7. The climbing device 02 continues to descend. When the lower drive rack 112 descends to position H5, it engages and disengages with the lower gear 232, and the cover plate 42 is completely closed. After the cover plate stroke detection device 52 confirms, the climbing device 02 continues to descend to the target position.

[0049] 8. The upward process is the opposite, with the lower drive rack 112 triggering the opening of the cover at H6 to H7, and the upper drive rack 111 triggering the closing of the cover at H9 to H10.

Claims

1. A coupled automatic sliding orifice cover switch device, characterized in that: It includes a drive rack (11), a cover plate switch auxiliary mechanism (2), a personnel emergency operation mechanism (3), a cover plate device (4), and a safety control system (5); The cover plate switch auxiliary mechanism (2) is meshed and connected to the drive rack (11) for transmission; The personnel emergency operation mechanism (3) can be selectively engaged with the cover plate switch auxiliary mechanism (2); The cover plate device (4) is connected to the output end of the cover plate switch auxiliary mechanism (2); The safety control system (5) is located near the cover plate device (4) and is used to monitor the position of the cover plate device (4); The drive rack (11) is mounted on the climbing device (02) and can transmit the up-and-down running power of the climbing device (02) to the cover switch auxiliary mechanism (2) to drive the cover device (4) to perform opening or closing actions.

2. The coupled automatic sliding orifice cover switch device according to claim 1, characterized in that: The drive rack (11) includes an upper drive rack (111) and a lower drive rack (112). The upper drive rack (111) and the lower drive rack (112) are fixedly installed on both sides of the climbing device (02).

3. The coupled automatic sliding orifice cover switch device according to claim 2, characterized in that: The cover plate switch auxiliary mechanism (2) includes a base (21), an input shaft (22), a gear (23), a bevel gear (24), a transmission bevel gear (25), a connecting rod (26), a lead screw (27), a lead screw cover plate drive connector (28), and a synchronous connecting shaft (29). The base (21) includes an upper base (211) and a lower base (212); The input shaft (22) includes an upper input shaft (221) and a lower input shaft (222), which are rotatably mounted on the base (21); The gear (23) includes an upper gear (231) fixedly mounted on the upper input shaft (221) and a lower gear (232) fixedly mounted on the lower input shaft (222). The upper gear (231) meshes with the upper drive rack (111), and the lower gear (232) meshes with the lower drive rack (112).

4. The coupled automatic sliding orifice cover switch device according to claim 3, characterized in that: The bevel gear (24) includes an upper bevel gear (241) installed in the upper base (211) and a lower bevel gear (242) installed in the lower base (212). The transmission bevel gear (25) includes an upper transmission bevel gear (251) that meshes with an upper bevel gear (241) and a lower transmission bevel gear (252) that meshes with a lower bevel gear (242). The connecting rod (26) includes an upper connecting rod (261) connected to the upper transmission bevel gear (251) and a lower connecting rod (262) connected to the lower transmission bevel gear (252).

5. The coupled automatic sliding orifice cover switch device according to claim 4, characterized in that: The upper bevel gear (241) includes a first bevel gear (241-1) mounted on the upper input shaft (221) and a second bevel gear (241-2) mounted on the end of the first lead screw (271). The lower bevel gear (242) includes a third bevel gear (242-1) mounted on the lower input shaft (222) and a fourth bevel gear (242-2) mounted on the end of the second lead screw (272). The upper transmission bevel gear (251) includes a first transmission bevel gear (251-1) that meshes with a first bevel gear (241-1), and a second transmission bevel gear (251-2) that is coaxially arranged with the first transmission bevel gear (251-1) and meshes with a second bevel gear (241-2). The lower transmission bevel gear (252) includes a third transmission bevel gear (252-1) that meshes with the third bevel gear (242-1), and a fourth transmission bevel gear (252-2) that is coaxially arranged with the third transmission bevel gear (252-1) and meshes with the fourth bevel gear (242-2).

6. The coupled automatic sliding orifice cover switch device according to claim 3, characterized in that: The lead screw (27) includes a first lead screw (271) and a second lead screw (272), and the lead screw (27) is connected to the connecting rod (26) through a transmission bevel gear (25); The lead screw cover plate drive connector (28) is sleeved on the lead screw (27) and connected to the cover plate device (4); The synchronous connecting shaft (29) is equipped with a first synchronous bevel gear (251-3) and a second synchronous bevel gear (252-3). The first synchronous bevel gear (251-3) can mesh with the second bevel gear (241-2), and the second synchronous bevel gear (252-3) can mesh with the fourth bevel gear (242-2). It can connect the first lead screw (271) and the second lead screw (272) to achieve synchronous rotation of the two.

7. The coupled automatic sliding orifice cover switch device according to claim 3, characterized in that: The upper base (211) is provided with a first clearance groove (211-1), a first receiving drive component mounting hole group (211-2), a first intermediate transmission drive component mounting hole group (211-3), a first cover plate switch actuator clearance groove (211-4), and a cover plate switch actuator mounting hole (211-5). The lower base (212) is provided with a second clearance groove (212-1), a second receiving drive component mounting hole group (212-2), a second intermediate transmission drive component mounting hole group (212-3), a second cover plate switch actuator clearance groove (212-4), and a cover plate switch actuator mounting hole (212-5).

8. The coupled automatic sliding orifice cover switch device according to claim 1, characterized in that: The personnel emergency operation mechanism (3) includes an operating handwheel (31), an operating shaft (32), and a manual bevel gear (33). One end of the operating shaft (32) is connected to the operating handwheel (31), and the other end is provided with a manual bevel gear (33). The manual bevel gear (33) selectively meshes with the bevel gear (24) or the transmission bevel gear (25) in the cover plate switch auxiliary mechanism (2).

9. The coupled automatic sliding orifice cover switch device according to claim 1, characterized in that: The cover plate device (4) includes a support rail (41), a cover plate (42), and a sensing rod (44). The support rail (41) is fixedly installed around the hole (01); The cover plate (42) is supported on the support rail (41) by rollers (43). The cover plate (42) has a cover plate switch auxiliary mechanism mounting hole (42-1) for connecting to the output end of the cover plate switch auxiliary mechanism (2). The sensing rod (44) is mounted on the cover plate (42).

10. A coupled automatic sliding orifice cover switch device according to claim 9, characterized in that: The safety control system (5) is a position sensor, which is set at both ends of the support rail (41) and used to detect the position of the sensing rod (44); The safety control system (5) issues an alarm signal and sends a stop signal to the control system of the climbing device (02) when the cover plate (42) fails to reach the predetermined open or close position.

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