A mechanical restraint safety protection device

Abstract

This invention discloses a mechanical safety device, characterized by: a mounting bracket installed on the elevator car guide rail; a safety switch mounted on the mounting bracket, the safety switch being electrically connected to the elevator control system; a vertical mounting groove on the mounting bracket, within which a blocking plate is rotatably mounted, one end of the blocking plate being a connecting end and the other end a blocking end, the blocking plate being rotatably connected to the vertical mounting groove via the connecting end; the safety switch being installed on the left side of the mounting bracket, the detection end of the safety switch being located below within the vertical mounting groove; a second bolt being screwed to the top of the mounting bracket, the bottom of the second bolt being able to be inserted into the vertical mounting groove; the blocking plate having both a usable state and a blocking state. This invention improves the safety of maintenance.

Description

Technical Field

[0001] This invention relates to an elevator, and more particularly to an upper mechanical stop safety protection device. Background Technology

[0002] When performing maintenance on the main engine or car top of a machine-room-less elevator, especially in elevators located in low-rise or high-floor spaces, the maintenance is typically carried out manually from the car top. This presents a safety hazard:

[0003] Elevators normally have a downward limit switch but no upward limit switch. Therefore, if the elevator malfunctions or is misoperated and the car continues to move upward, there is a risk that maintenance personnel could hit the top of the elevator shaft or the main unit, posing a significant safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide an upper mechanical blocking safety protection device. By using this structure, the safety of elevator maintenance is improved and safety hazards are reduced.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: an upper mechanical stop safety protection device, including a mounting frame installed on the car guide rail, a safety switch installed on the mounting frame, and the safety switch being electrically connected to the elevator control system;

[0006] The mounting bracket is provided with a vertical mounting slot, and a baffle plate is rotatably mounted in the vertical mounting slot.

[0007] One end of the baffle plate is a connecting end, and the other end is a blocking end. The baffle plate is rotatably connected to the vertical mounting groove via the connecting end.

[0008] The safety switch is installed on the left side of the mounting bracket, and the detection end of the safety switch is located at the bottom of the vertical mounting slot;

[0009] The top of the mounting bracket is screwed with a second bolt, the bottom of which can be inserted into the vertical mounting groove;

[0010] The blocking plate has a use state and a blocking state. In the use state, the blocking end of the blocking plate is disposed in the vertical mounting groove, and the blocking end of the blocking plate is in contact with the detection end of the safety switch.

[0011] When the blocking plate is in the blocking state, the blocking end of the blocking plate is located on the right side of the mounting bracket, and the blocking plate is perpendicular to the mounting bracket. The bottom of the second bolt abuts against the upper surface of the blocking plate.

[0012] In the above technical solution, the blocking plate is rotatably connected to the mounting frame via a connecting shaft.

[0013] In the above technical solution, the second bolt is located on the upper left side of the connecting shaft.

[0014] In the above technical solution, the distance between the blocking end and the connecting shaft is greater than the distance between the connecting end and the connecting shaft.

[0015] In the above technical solution, when the blocking plate is in use, the bottom of the second bolt abuts against the upper surface of the connecting end of the blocking plate.

[0016] In the above technical solution, an elastic buffer block is provided on the blocking end of the blocking plate, and the elastic buffer block is disposed on the bottom surface of the blocking end when the blocking plate is in the blocking state.

[0017] In the above technical solution, the mounting bracket is also provided with a limiting bolt, which is located at the right end of the second bolt and above the right end of the connecting shaft. When the blocking plate is in the blocking state, the bottom of the limiting bolt abuts against the upper surface of the blocking plate.

[0018] In the above technical solution, the mounting bracket is also provided with a second safety switch. The second safety switch is located on the right side of the limiting bolt. When the blocking plate is in the blocking state, the bottom of the second safety switch is set directly opposite the blocking plate, and there is a gap between the detection end of the bottom of the second safety switch and the upper surface of the blocking plate.

[0019] In the above technical solution, the second safety switch is connected to the mounting bracket via a sleeve, the middle part of the sleeve is connected to the mounting bracket, the middle part of the sleeve is provided with a cavity, and the two ends of the cavity are respectively connected to the top and bottom of the sleeve;

[0020] A cover plate is detachably installed on the top of the sleeve. The second safety switch is movably installed in the cavity via a connector. A spring is also provided in the cavity. The top of the spring abuts against the bottom surface of the cover plate, and the bottom of the spring abuts against the top surface of the connector. The spring pushes the connector and the second safety switch downward, so that the detection end of the bottom of the second safety switch is positioned below the sleeve.

[0021] In the above technical solution, the connecting component includes a hollow sliding sleeve and two sets of connecting bolts. The hollow sliding sleeve is slidably disposed in the cavity. A vertical through groove is provided on each side of the sleeve. A screw hole is provided at each end of the hollow sliding sleeve. The screw hole is connected to the interior of the hollow sliding sleeve. The second safety switch is installed above the hollow sliding sleeve. The inner end of each set of connecting bolts passes through a set of vertical through grooves and is screwed to a set of screw holes. The inner end of the connecting bolt abuts against the side wall of the second safety switch. The connecting bolt is disposed outside the vertical through groove. The connecting bolt is slidably connected to the vertical through groove. The hollow sliding sleeve is slidably connected to the sleeve via the connecting bolt.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0023] 1. In this invention, a mounting bracket is installed on the car guide rail, and a blocking mechanism and a safety switch are installed on the mounting bracket. During maintenance, the blocking mechanism disengages from the safety switch. This allows the elevator to be aware of the maintenance status through the safety switch setting, preventing the car from moving upward. At the same time, even if the safety switch malfunctions, the blocking mechanism, in its open state, will be positioned above the car, mechanically limiting the upward movement of the car. This effectively improves the safety of maintenance and reduces safety hazards.

[0024] 2. In this invention, the opening and closing of the blocking mechanism are both limited by bolts to ensure the stability and safety of the blocking mechanism's position during elevator operation and maintenance. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram (in use) of Embodiment 1 of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure in Embodiment 1 of the present invention (in the blocking state);

[0027] Figure 3 yes Figure 1 A partially enlarged structural diagram of the installation location of the second safety switch.

[0028] The components include: 1. Car guide rail; 2. Mounting bracket; 3. Safety switch; 4. Vertical mounting groove; 5. Blocking plate; 6. Connecting end; 7. Blocking end; 8. Second bolt; 9. Coupling shaft; 10. Elastic buffer block; 11. Limit bolt; 12. Second safety switch; 13. Sleeve; 14. Cavity; 15. Cover plate; 16. Spring; 17. Hollow sliding sleeve; 18. Connecting bolt; 19. Vertical through groove; 20. Screw hole. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Example 1: See Figures 1-3 As shown, an upper mechanical stop safety protection device includes a mounting bracket 2 installed on the car guide rail 1, a safety switch 3 installed on the mounting bracket, and the safety switch is electrically connected to the elevator control system.

[0031] The mounting bracket is provided with a vertical mounting slot 4, and a baffle plate 5 is rotatably mounted in the vertical mounting slot.

[0032] One end of the baffle plate 5 is a connecting end 6, and the other end is a blocking end 7. The baffle plate is rotatably connected to the vertical mounting groove via the connecting end.

[0033] The safety switch is installed on the left side of the mounting bracket, and the detection end of the safety switch is located at the bottom of the vertical mounting slot;

[0034] The top of the mounting bracket is screwed with a second bolt 8, the bottom of which can be inserted into the vertical mounting groove;

[0035] The blocking plate has a use state and a blocking state. In the use state, the blocking end of the blocking plate is disposed in the vertical mounting groove, and the blocking end of the blocking plate is in contact with the detection end of the safety switch.

[0036] When the blocking plate is in the blocking state, the blocking end of the blocking plate is located on the right side of the mounting bracket, and the blocking plate is perpendicular to the mounting bracket. The bottom of the second bolt abuts against the upper surface of the blocking plate.

[0037] In this embodiment, the mounting bracket is installed on the outside of the car guide rail. During normal car operation, the mounting bracket will not affect the normal operation of the car. In actual use, under normal elevator operation, the blocking plate is in use, with its blocking end in contact with the detection end of the safety switch. The safety switch feeds data back to the elevator control system, indicating that the elevator can move upwards normally. When maintenance is required, maintenance personnel stand on top of the car and rotate the blocking plate to its blocking position. The blocking plate is then perpendicular to the mounting bracket, with the blocking end directly above the car. The second bolt is then tightened downwards, so that its bottom abuts against the blocking plate, preventing the right end of the blocking plate from falling downwards and limiting its position. This ensures that the blocking end of the blocking plate is above the car and does not contact the safety switch. When the baffle plate disengages and the safety switch engages, the safety switch sends data back to the elevator control system. The elevator control system detects this and the elevator cannot move upwards. If the elevator continues to move upwards, it will be blocked by the baffle plate. Under the control of the electrical system, the safety switch also acts as a mechanical barrier to prevent the elevator from moving upwards, effectively ensuring the safety of maintenance personnel.

[0038] See Figure 1 , 2 As shown, the baffle plate is rotatably connected to the mounting frame via the connecting shaft 9.

[0039] The second bolt is located on the upper left side of the coupling.

[0040] The second bolt is located on the upper left side of the connecting shaft. When the blocking plate is in the blocking state, the second bolt is screwed downwards and pressed against the top surface of the blocking plate. This restricts the rotation of the blocking plate, prevents the blocking end from contacting the safety switch, and serves as a limit to the triggering of the safety switch, as well as a mechanical limit.

[0041] See Figure 1 , 2 As shown, the distance between the blocking end and the connecting shaft is greater than the distance between the connecting end and the connecting shaft.

[0042] The distance between the connecting shaft and the vertical mounting slot is relatively short. In the blocking state, the distance between the blocking plate and the vertical mounting slot is short. If the blocking end of the blocking plate continues to rotate upward (counterclockwise rotation, i.e., the car continues to move upward, pushing the blocking end of the blocking plate to continue to rotate upward), the blocking plate will touch the vertical mounting slot, preventing the blocking plate from continuing to rotate upward. This serves as an upward mechanical limit, preventing the car from continuing to move upward.

[0043] In the operating state, the bottom of the second bolt abuts against the upper surface of the connecting end of the block plate. In the blocking state, the second bolt restricts the block plate from rotating clockwise, preventing contact with the safety switch.

[0044] See Figure 1 , 2 As shown, an elastic buffer block 10 is provided on the blocking end of the baffle plate. When the baffle plate is in the blocking state, the elastic buffer block is disposed on the bottom surface of the blocking end. The elastic buffer block plays a buffering role when the car continues to move upward and collides with the baffle plate, reducing the impact force, preventing vibration and shaking caused by the collision, reducing certain safety hazards, giving maintenance personnel timely handling time, and ensuring the safety of maintenance.

[0045] See Figure 1 , 2 As shown, the mounting bracket is also equipped with a limiting bolt 11, which is located at the right end of the second bolt and above the right end of the connecting shaft. When the blocking plate is in the blocking state, the bottom of the limiting bolt abuts against the upper surface of the blocking plate. By setting the limiting bolt, the blocking plate is further restricted in the blocking state, preventing the right end of the blocking plate from moving upward and rotating.

[0046] See Figures 1-3 As shown, the mounting bracket is also provided with a second safety switch 12. The second safety switch is located on the right side of the limiting bolt. When the blocking plate is in the blocking state, the bottom of the second safety switch is set directly opposite the blocking plate, and there is a gap between the detection end at the bottom of the second safety switch and the upper surface of the blocking plate. The gap value is greater than or equal to 0.

[0047] The second safety switch is connected to the elevator control system's electrical control. Because of this second safety switch, when the stop plate disengages from the safety switch but the car continues to move upwards, the stop plate undergoes a certain degree of bending deformation. The gap between the second safety switch and the stop plate is relatively small, greater than or equal to zero, causing the stop plate to contact the second safety switch and trigger it. Once triggered, the elevator control system will stop the elevator to ensure the safety of maintenance personnel. In this invention, the safety switch, the second safety switch, and the stop plate provide dual electrical control protection and a single mechanical protection for maintenance safety—a triple protection that effectively safeguards the safety of maintenance personnel.

[0048] See Figures 1-3 As shown, the second safety switch is connected to the mounting bracket via a sleeve 13. The middle part of the sleeve is connected to the mounting bracket. A cavity 14 is provided in the middle part of the sleeve. The two ends of the cavity are respectively connected to the top and bottom of the sleeve.

[0049] A cover plate 15 is detachably installed on the top of the sleeve. The second safety switch is movably installed in the cavity above the connector. A spring 16 is also provided in the cavity. The top of the spring abuts against the bottom surface of the cover plate, and the bottom of the spring abuts against the top surface of the connector. The spring pushes the connector and the second safety switch to move downward, so that the detection end of the bottom of the second safety switch is located below the sleeve.

[0050] The connector includes a hollow sliding sleeve 17 and two sets of connecting bolts 18. The hollow sliding sleeve is slidably disposed in the cavity. A vertical through groove 19 is provided on both sides of the sleeve. A screw hole 20 is provided at both ends of the hollow sliding sleeve. The screw hole is connected to the interior of the hollow sliding sleeve. The second safety switch is installed above the hollow sliding sleeve. The inner end of each set of connecting bolts passes through a set of vertical through grooves and is screwed to a set of screw holes. The inner end of the connecting bolt abuts against the side wall of the second safety switch. The connecting bolt is disposed outside the vertical through groove. The connecting bolt is slidably connected to the vertical through groove. The hollow sliding sleeve is slidably connected to the sleeve via the connecting bolt.

[0051] In this embodiment, the second safety switch is installed inside the sleeve, and a spring is provided to push the second safety switch downward. The spring pushes the safety switch downward, so that its detection end contacts the blocking plate, or is above the blocking plate. The compression and retraction deformation force of the detection end is less than the elastic force of the spring. When the blocking plate is pushed upward to rotate, it will first squeeze the detection end, thus triggering the second safety switch. If the blocking plate continues to push the second safety switch upward, it will squeeze the spring until the second safety switch is damaged or the blocking plate stops deforming.

[0052] In this embodiment, when the blocking plate is in use, that is, in the unblocking state, the spring pushes the second safety switch to move downward. The downward movement is restricted by the connecting bolt and the vertical through groove to prevent the second safety switch from falling. Furthermore, it is a flexible position that can move up and down, so that even if the second safety switch is touched, it will not be directly damaged, giving its electronic control reaction time and ensuring that the second safety switch can continue to be used as much as possible.

[0053] When the baffle is not blocking, first turn the second bolt and the limit bolt upwards, away from the baffle, so as not to affect the normal rotation of the baffle. After the baffle has finished rotating, turn the second bolt and the limit bolt downwards, so that the second bolt and the limit bolt abut against the end face of the connection end, so that the baffle cannot rotate, and the baffle is always in contact with the safety switch to ensure that the elevator can operate normally.

Claims

1. A mechanically restraining safety protection device, characterized in that: Includes a mounting bracket installed on the car guide rail, wherein a safety switch is installed on the mounting bracket and the safety switch is electrically connected to the elevator control system; The mounting bracket is provided with a vertical mounting slot, and a baffle plate is rotatably mounted in the vertical mounting slot. One end of the baffle plate is a connecting end, and the other end is a blocking end. The connecting end of the baffle plate is rotatably connected to the vertical mounting groove via a connecting shaft. The safety switch is installed on the left side of the mounting bracket, and the detection end of the safety switch is located at the bottom of the vertical mounting slot; The top of the mounting bracket is screwed with a second bolt, the bottom of which can be inserted into the vertical mounting groove, and the second bolt is located on the upper left side of the connecting shaft; The mounting bracket is also equipped with a limit bolt and a second safety switch. The limit bolt is located at the right end of the second bolt and is located above the right end of the connecting shaft. The second safety switch is located to the right of the limit bolt. The blocking plate has a use state and a blocking state. In the use state, the blocking end of the blocking plate is disposed in the vertical mounting groove, the bottom of the second bolt abuts against the upper surface of the connecting end of the blocking plate, and the blocking end of the blocking plate is in contact with the detection end of the safety switch. In the blocking state, the blocking end of the blocking plate is located on the right side of the mounting bracket, and the blocking plate is perpendicular to the mounting bracket. The bottom of the second bolt and the limiting bolt abut against the upper surface of the blocking plate. The bottom of the second safety switch is located directly opposite the blocking plate, and there is a gap between the detection end of the bottom of the second safety switch and the upper surface of the blocking plate. The second safety switch is electrically connected to the elevator control system. After the second safety switch is triggered, the elevator control system stops the elevator.

2. The mechanical restraint safety protection device according to claim 1, characterized in that: The distance between the blocking end and the connecting shaft is greater than the distance between the connecting end and the connecting shaft.

3. The mechanical restraint safety protection device according to claim 1, characterized in that: An elastic buffer block is provided on the blocking end of the blocking plate. When the blocking plate is in the blocking state, the elastic buffer block is disposed on the bottom surface of the blocking end.

4. The mechanical restraint safety protection device according to claim 1, characterized in that: The second safety switch is connected to the mounting bracket via a sleeve. The middle part of the sleeve is connected to the mounting bracket. A cavity is provided in the middle part of the sleeve. The two ends of the cavity are respectively connected to the top and bottom of the sleeve. A cover plate is detachably installed on the top of the sleeve. The second safety switch is movably installed in the cavity via a connector. A spring is also provided in the cavity. The top of the spring abuts against the bottom surface of the cover plate, and the bottom of the spring abuts against the top surface of the connector. The spring pushes the connector and the second safety switch downward, so that the detection end of the bottom of the second safety switch is positioned below the sleeve.

5. The upper mechanical restraint safety protection device according to claim 4, characterized in that: The connector includes a hollow sliding sleeve and two sets of connecting bolts. The hollow sliding sleeve is slidably disposed within the cavity. A vertical through groove is provided on each side of the sleeve. A screw hole is provided at each end of the hollow sliding sleeve. The screw hole communicates with the interior of the hollow sliding sleeve. The second safety switch is installed above the hollow sliding sleeve. The inner end of each set of connecting bolts passes through a set of vertical through grooves and is screwed to a set of screw holes. The inner end of the connecting bolt abuts against the side wall of the second safety switch. The connecting bolt is disposed outside the vertical through groove and is slidably connected to the vertical through groove. The hollow sliding sleeve is slidably connected to the sleeve via the connecting bolt.

Images