Detection switch for gap between elevator car door knife and landing door sill and use method

Abstract

The invention relates to the technical field of detection equipment, in particular to a detection switch for a gap between a door knife of an elevator car door and a landing door sill and a use method of the detection switch. The detection switch comprises a detection switch body, a distance detection part, a travel switch assembly and a follow-up trigger assembly. The limiting bolt is matched with the limiting groove to limit the length of the portion, extending out of the detection switch body, of the end of the detection cross rod, the follow-up trigger assembly is installed outside the detection cross rod, the end of the detection cross rod is pushed by external force to drive the follow-up trigger assembly to transversely move, and the travel switch assembly is triggered in the transverse moving process of the follow-up trigger assembly. The travel switch assembly sends out a trigger signal after being triggered, and whether the distance between the landing sill and the elevator car door vane is within the maintenance reference numerical value range or not is checked through ascending and descending operation of the elevator.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and in particular to a switch for detecting the gap between a door blade of an elevator car door and a floor door sill, and a use method thereof. Background Art

[0002] The gap between the elevator door blade and the floor door sill during elevator operation is a common item in elevator maintenance. It is mainly used to prevent the gap between the elevator door blade and the floor door sill from being too large or too small during the operation of old and non-standard elevators.

[0003] Usually, when the elevator car passes through the floor door sill, the distance between the car door knife and the floor door sill is 5-10mm. When the distance is too large, it is easy to cause the floor door lock to fail to open during the elevator operation. When the distance is too small, there is a risk of collision during the elevator operation. Therefore, during the elevator maintenance process, it is necessary to detect the distance between the car door knife and the floor door sill one by one. For high-rise buildings, the method of detecting one by one has a large workload and low work efficiency. Therefore, a switch for detecting the gap between the elevator car door knife and the floor door sill is proposed. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a switch for detecting the gap between the door blade of an elevator car door and the floor door sill and a method for using the switch.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an elevator car door blade to floor door sill gap detection switch, comprising a detection switch body, a spacing detection part, a travel switch assembly and a follow-up trigger assembly;

[0006] The spacing detection part is arranged at a middle position inside the detection switch body, and the contact end of the spacing detection part extends to the outside of the detection switch body;

[0007] The travel switch assembly is arranged at the inner side of the detection switch body;

[0008] The follow-up trigger component is arranged outside the other end of the spacing detection part, and the follow-up trigger component abuts against the travel switch component;

[0009] The spacing detection part includes a detection cross bar transversely arranged inside the detection switch body, a transverse movement limiting rod installed on both sides of the contact end of the spacing detection part through a rotating shaft, a limiting rod auxiliary slider connected to the inside of the transverse movement limiting rod and slidably connected to the detection switch body, a limiting groove provided inside the detection cross bar, a limiting bolt installed inside the limiting groove, and a reset spring arranged at the end of the detection cross bar and in contact with the inner wall of the detection switch body;

[0010] The limit bolt is maintained in the relative position of the detection switch body by rotational fixation. The limit bolt and the limit groove cooperate to limit the length of the end of the detection cross bar extending out of the detection switch body. The follow-up trigger assembly is installed on the outside of the detection cross bar. The end of the detection cross bar is pushed by external force to drive the follow-up trigger assembly to move horizontally. The follow-up trigger assembly triggers the travel switch assembly during the horizontal movement, and a trigger signal is sent out after the travel switch assembly is triggered.

[0011] Preferably, the detection switch body includes two groups of outer shells, a switch inner chamber, two groups of sliding limit cavities and an observation port. The two groups of outer shells are butt-jointed and fixed, and the interior of the two groups of butt-jointed and fixed outer shells forms a switch inner chamber. The two groups of sliding limit cavities are respectively formed at the two ends of the inner chamber of the switch, and the sides of the two groups of butt-jointed and fixed outer shells form an observation port.

[0012] Preferably, the detection cross bar is placed horizontally in the middle of the inner chamber of the switch, and the end of the detection cross bar extends through the observation port to the outside of the detection switch body. The limiting rod auxiliary slider is arranged inside the sliding limit cavity and is restricted by the limiting rod auxiliary slider. The detection cross bar forms a horizontal lateral sliding path under the cooperative restriction of the sliding limit cavity, the transverse movement limiting rod and the limiting rod auxiliary slider.

[0013] Preferably, the spacing detection part also includes an auxiliary spring arranged at the end of the auxiliary sliding block of the limiting rod, the inner wall of the outer shell is provided with a limiting hole matched with the auxiliary spring, and the end of the auxiliary spring is sleeved in the limiting hole.

[0014] Preferably, the outer shell includes a limit indicating groove and a sliding avoidance groove, the limit indicating groove and the sliding avoidance groove are opened in parallel in the middle of the outer shell, the limit bolt is installed inside the limit indicating groove, the limit bolt maintains a relative position with the outer shell by a threaded connection, the surface of the limit indicating groove is marked with an indicating scale, the surface of the follow-up trigger assembly is formed with a sliding block that cooperates with the sliding avoidance groove, the sliding block is sleeved in the sliding avoidance groove and is restricted by the sliding avoidance groove.

[0015] Preferably, the travel switch assembly includes a switch seat, a limit spring and a travel switch, the side wall of the outer shell is provided with a through hole, the switch seat is sleeved in the through hole and restricted by the through hole, the limit spring is arranged between the switch seat and the inner wall of the detection switch body, and the travel switch is fixed inside the switch seat.

[0016] Preferably, the follower trigger assembly includes a follower trigger block and a fixing bolt, the follower trigger block is installed on the upper part of the detection cross bar, the fixing bolt is threadedly connected to the inside of the follower trigger block, and the follower trigger block is fixed to the upper part of the detection cross bar under the restriction of the fixing bolt.

[0017] Preferably, the outer shell further comprises a fixing bolt groove, the fixing bolt groove is opened at the upper part of the outer shell, and the side of the follower trigger block is nested in the fixing bolt groove and restricted by the fixing bolt groove.

[0018] Preferably, the detection switch body also includes an observation port, which is opened at the top of the outer shell, the opening position of the observation port corresponds to the side of the follow-up trigger block, an observation glass is arranged inside the observation port, and a magnet is arranged outside the detection switch body.

[0019] A method for using a switch for detecting the gap between a door blade of an elevator car door and a floor door sill comprises the following steps:

[0020] Step S1, according to the allowable clearance range given by the elevator model to be inspected, the setting position of the limit bolt is set, the setting position of the limit bolt is consistent with the minimum value of the allowable clearance range, and under the cooperation of the limit bolt and the limit groove, the extension distance of the detection cross bar is the minimum value of the allowable clearance range;

[0021] Step S2, fix the detection switch body to the elevator car door blade through a magnet, the detection cross bar inside the detection switch body faces the gap between the car door blade and the floor door sill, and connect the output end of the travel switch to the external signal transmitting device;

[0022] Step S3, controlling the elevator to run. During the operation, the detection switch body at the elevator car door blade moves synchronously. When the detection switch body passes through the floor door sill, when the gap width between the floor door sill and the elevator car door blade is less than the minimum value of the gap allowable range, the floor door sill will push the detection crossbar. During the horizontal movement, the detection crossbar will drive the travel switch pushed by the follow-up trigger component. After the travel switch is triggered, it controls the external signal transmitting device to send a signal. The floor that sends the signal is the problematic floor.

[0023] Step S4, after the minimum value detection is completed, the setting position of the limit bolt is set again, the setting position of the limit bolt is consistent with the maximum value of the allowable range of the gap, and under the cooperation of the limit bolt and the limit groove, the extension distance of the detection cross bar is the maximum value of the allowable range of the gap;

[0024] Step S5, control the operation of the elevator. During the operation, the detection switch body at the elevator car door knife moves synchronously. When the detection switch body passes through the floor door sill, the floor door sill will push the detection cross bar. The detection cross bar will drive the travel switch pushed by the follow-up trigger component during the horizontal movement. After the travel switch is triggered, it controls the external signal transmitting device to send a signal. The floor that sends the signal is the floor without problem. When the width of the gap between the floor door sill and the elevator car door knife is greater than the maximum value of the gap allowable range, the floor door sill cannot push the detection cross bar, and then cannot push the travel switch. The travel switch cannot control the external signal transmitting device to send a signal. The floor that does not send a signal is the floor with problem.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The present invention is provided with a detection switch body, a spacing detection part, a travel switch group and a follow-up trigger assembly, and through the up and down operation of the elevator, it is respectively checked whether the distance between the middle door sill of each floor and the elevator car door blade is within the maintenance reference value range, so as to quickly check each floor in the high-rise elevator, with high inspection efficiency and fast speed;

[0027] 2. In the present invention, a magnet is provided on the outside of the detection switch body, and the detection switch body can be fixed in the elevator car by the magnet without additional fixation, which is easy to use. At the same time, the movable fixing method can avoid rigid collision damage to the detection switch body by shifting and avoiding, and also avoid squeezing damage to the elevator equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional unfolded structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 ;

[0031] Figure 4 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 ;

[0032] Figure 5 It is a schematic diagram of the coordination structure of the travel switch group and the follow-up trigger assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of the moving direction of the spacing detection part of the present invention.

[0034] The numbers in the figure represent:

[0035] 1. Detection switch body; 11. Outer shell; 111. Limit indication groove; 112. Sliding avoidance groove; 113. Fixing bolt groove; 12. Switch inner chamber; 13. Sliding limit cavity; 14. Observation port; 2. Spacing detection part; 21. Detection cross bar; 22. Transverse movement limit bar; 23. Limit bar auxiliary slider; 24. Limit groove; 25. Limit bolt; 26. Reset spring; 27. Auxiliary spring; 3. Travel switch group; 31. Switch seat; 32. Limit spring; 33. Travel switch; 4. Follow-up trigger assembly; 41. Follow-up trigger block; 42. Fixing bolt; 5. Observation slide; 6. Magnet. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the following embodiments are merely preferred embodiments of the present invention and are not exhaustive.

[0037] Example:

[0038] like Figure 1 - Figure 6 As shown, the present invention provides a switch for detecting the gap between a door blade of an elevator car door and a floor door sill, comprising a detection switch body 1, a spacing detection part 2, a travel switch assembly 3 and a follow-up trigger assembly 4;

[0039] The distance detection part 2 is arranged at the middle position inside the detection switch body 1, and the contact end of the distance detection part 2 extends to the outside of the detection switch body 1;

[0040] The travel switch assembly 3 is arranged at the inner side of the detection switch body 1;

[0041] The follow-up trigger component 4 is arranged outside the other end of the spacing detection part 2, and the follow-up trigger component 4 abuts against the travel switch component 3;

[0042] The spacing detection part 2 includes a detection cross bar 21 transversely arranged inside the detection switch body 1, a transverse movement limiting rod 22 installed on both sides of the contact end of the spacing detection part 2 through a rotating shaft, a limiting rod auxiliary slider 23 connected to the inside of the transverse movement limiting rod 22 and slidably connected to the detection switch body 1, a limiting groove 24 provided inside the detection cross bar 21, a limiting bolt 25 installed inside the limiting groove 24, and a reset spring 26 arranged at the end of the detection cross bar 21 and in contact with the inner wall of the detection switch body 1;

[0043] The limit bolt 25 is maintained in the relative position of the detection switch body 1 by rotational fixation. The limit bolt 25 cooperates with the limit groove 24 to limit the length of the end of the detection cross bar 21 extending out of the detection switch body 1. The follow-up trigger assembly 4 is installed on the outside of the detection cross bar 21. The end of the detection cross bar 21 is pushed by an external force to drive the follow-up trigger assembly 4 to move horizontally. The follow-up trigger assembly 4 triggers the travel switch assembly 3 during the horizontal movement, and the travel switch assembly 3 sends a trigger signal after being triggered.

[0044] The detection switch body 1 includes two groups of outer shells 11, a switch inner chamber 12, two groups of sliding limit cavities 13 and an observation port 14. The two groups of outer shells 11 are butt-jointed and fixed, and the switch inner chamber 12 is formed inside the two groups of butt-jointed outer shells 11. The two groups of sliding limit cavities 13 are respectively formed at the two ends of the switch inner chamber 12, and the observation port 14 is formed on the side of the two groups of butt-jointed outer shells 11.

[0045] The detection cross bar 21 is placed horizontally in the middle of the switch inner chamber 12, and the end of the detection cross bar 21 extends through the observation port 14 to the outside of the detection switch body 1. The limiting rod auxiliary slider 23 is arranged inside the sliding limit cavity 13 and is restricted by the limiting rod auxiliary slider 23. The detection cross bar 21 forms a horizontal transverse sliding path under the cooperation and restriction of the sliding limit cavity 13, the transverse movement limiting rod 22 and the limiting rod auxiliary slider 23. When the detection cross bar 21 is pushed and moved transversely, the end of the detection cross bar 21 drives the transverse movement limiting rod 22 to adjust the setting synchronously, and the end of the transverse movement limiting rod 22 drives the limiting rod auxiliary slider 23 to move along the sliding limit cavity 13. The limiting rod auxiliary slider 23 at the end of the transverse movement limiting rod 22 is pushed and compressed, and the compressed limiting rod auxiliary slider 23 provides power for the resetting of the detection cross bar 21.

[0046] The spacing detection part 2 also includes an auxiliary spring 27 arranged at the end of the auxiliary slider 23 of the limiting rod. The inner wall of the outer shell 11 is provided with a limiting hole that cooperates with the auxiliary spring 27. The end of the auxiliary spring 27 is sleeved in the limiting hole. Under the elastic force of the auxiliary spring 27, the detection cross bar 21 moves laterally. The end of the detection cross bar 21 extends to the outside of the detection switch body 1 during the lateral movement, and is used to contact the gap with the floor door sill during the detection process.

[0047] The outer shell 11 includes a limit indicating groove 111 and a sliding avoidance groove 112;

[0048] The limit indicating groove 111 and the sliding avoidance groove 112 are opened in parallel in the middle of the outer shell 11, and the limit bolt 25 is installed inside the limit indicating groove 111. The limit bolt 25 maintains the relative position with the outer shell 11 through a threaded connection. The surface of the limit indicating groove 111 is marked with an indicating scale, and the indicating scale range is 0-10mm. When the limit bolt 25 is adjusted to the setting position inside the limit groove 24, the indicating scale can be used as an indication of the adjustment distance, which is convenient for the staff to set the detection interval. The surface of the follow-up trigger component 4 is formed with a slider that cooperates with the sliding avoidance groove 112. The slider is sleeved in the sliding avoidance groove 112 and is restricted by the sliding avoidance groove 112. The sliding avoidance groove 112 plays an auxiliary limiting role on the upper part of the follow-up trigger component 4 through the slider on the surface of the follow-up trigger component 4, so as to avoid deflection of the upper part of the follow-up trigger component 4 during the lateral movement.

[0049] The travel switch assembly 3 includes a switch seat 31, a limit spring 32 and a travel switch 33;

[0050] A through hole is provided in the side wall of the outer shell 11, and the switch seat 31 is sleeved in the through hole and restricted by the through hole. The limit spring 32 is arranged between the switch seat 31 and the inner wall of the detection switch body 1, and the travel switch 33 is fixed inside the switch seat 31. Under the restriction of the through hole, the switch seat 31 can only move laterally along the force direction when under pressure, so as to avoid lateral position deflection of the switch seat 31 and the travel switch 33 on the switch seat 31. Under the elastic force of the limit spring 32, the setting position of the switch seat 31 and the travel switch 33 on the switch seat 31 remains fixed. When the follow-up trigger component 4 pushes the travel switch 33 with the large-scale lateral movement of the detection cross bar 21, the travel switch 33 can drive the switch seat 31 to move laterally while maintaining the trigger state, so as to avoid rigid squeeze between the travel switch 33 and the follow-up trigger component 4, thereby avoiding pressure damage to the travel switch 33.

[0051] The follower trigger assembly 4 includes a follower trigger block 41 and a fixing bolt 42. The follower trigger block 41 is installed on the upper part of the detection cross bar 21. The fixing bolt 42 is threadedly connected to the inside of the follower trigger block 41. The follower trigger block 41 is fixed to the upper part of the detection cross bar 21 under the restriction of the fixing bolt 42. After the length of the detection cross bar 21 is set, the setting position of the follower trigger block 41 on the detection cross bar 21 is adjusted so that the follower trigger block 41 moves laterally along the detection cross bar 21 to abutment with the triggering part of the switch seat 31. The setting position of the follower trigger block 41 on the detection cross bar 21 is kept fixed by twisting the follower trigger block 41. At this time, the lateral movement of the detection cross bar 21 can drive the follower trigger block 41 to move laterally synchronously, so that the follower trigger block 41 triggers the travel switch 33.

[0052] The outer shell 11 also includes a fixing bolt groove 113, which is opened at the upper part of the outer shell 11. The side of the follower trigger block 41 is nested in the fixing bolt groove 113 and is restricted by the fixing bolt groove 113. During the lateral movement of the follower trigger block 41, the fixing bolt groove 113 can restrict the lateral movement of the follower trigger block 41, and can only move a certain distance in the lateral direction, thereby avoiding the problem that the follower trigger block 41 is misaligned due to lateral deflection and affects the normal triggering of the travel switch 33.

[0053] The detection switch body 1 also includes an observation port 14, which is opened at the top of the outer shell 11. The opening position of the observation port 14 corresponds to the side of the follow-up trigger block 41. An observation glass slide 5 is arranged inside the observation port 14. Through the cooperation between the opened observation port 14 and the observation glass slide 5, the triggering status of the follow-up trigger block 41 inside the sliding limit cavity 13 can be observed through the observation glass slide 5, which is convenient for the operator to judge and confirm the operating status of the equipment to ensure the normal operation of the equipment.

[0054] A magnet 6 is arranged on the outside of the detection switch body 1, and the detection switch body 1 can be fixed in the elevator car by the magnet 6 without additional fixing, which is convenient to use. Meanwhile, the movable fixing method can prevent the detection switch body 1 from being damaged by rigid collision.

[0055] When in use, the setting position of the limit bolt 25 is set according to the allowable clearance range given by the elevator model being inspected, and the setting position of the limit bolt 25 is consistent with the minimum value of the allowable clearance range. Under the cooperation of the limit bolt 25 and the limit groove 24, the extension distance of the detection cross bar 21 is the minimum value of the allowable clearance range;

[0056] The detection switch body 1 is fixed to the elevator car door blade through the magnet 6, the detection crossbar 21 inside the detection switch body 1 is facing the gap between the car door blade and the floor door sill, and the output end of the travel switch 33 is connected to the external signal transmitting device;

[0057] Control the operation of the elevator. During the operation, the detection switch body 1 at the elevator car door knife moves synchronously. When the detection switch body 1 passes through the floor door sill and the gap width between the floor door sill and the elevator car door knife is less than the minimum value of the gap allowable range, the floor door sill will push the detection crossbar 21. The detection crossbar 21 will drive the travel switch 33 pushed by the follow-up trigger component 4 during the horizontal movement. After the travel switch 33 is triggered, it controls the external signal transmitting device to send a signal. The floor that sends the signal is the problematic floor.

[0058] After the minimum value detection is completed, the setting position of the limit bolt 25 is set again, and the setting position of the limit bolt 25 is consistent with the maximum value of the allowable range of the gap. Under the cooperation of the limit bolt 25 and the limit groove 24, the extension distance of the detection cross bar 21 is the maximum value of the allowable range of the gap;

[0059] Control the operation of the elevator. During the operation, the detection switch body 1 at the elevator car door knife moves synchronously. The detection switch body 1 passes through the floor door sill, and the floor door sill will push the detection cross bar 21. The detection cross bar 21 will drive the travel switch 33 pushed by the follow-up trigger component 4 during the lateral movement. After the travel switch 33 is triggered, it controls the external signal transmitting device to send a signal. The floor that sends the signal is the floor without problems. When the width of the gap between the floor door sill and the elevator car door knife is greater than the maximum value of the gap allowable range, the floor door sill cannot push the detection cross bar 21, and then cannot push the travel switch 33. The travel switch 33 cannot control the external signal transmitting device to send a signal. The floor that does not send a signal is the floor with problems.

[0060] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. A switch for detecting the gap between the elevator car door blade and the floor door sill, characterized in that: It includes a detection switch body, a spacing detection part, a travel switch component and a follow-up trigger component; The spacing detection part is arranged at a middle position inside the detection switch body, and the contact end of the spacing detection part extends to the outside of the detection switch body; The travel switch assembly is arranged at the inner side of the detection switch body; The follow-up trigger component is arranged outside the other end of the spacing detection part, and the follow-up trigger component abuts against the travel switch component; The spacing detection part includes a detection cross bar transversely arranged inside the detection switch body, a transverse movement limiting rod installed on both sides of the contact end of the spacing detection part through a rotating shaft, a limiting rod auxiliary slider connected to the inside of the transverse movement limiting rod and slidably connected to the detection switch body, a limiting groove provided inside the detection cross bar, a limiting bolt installed inside the limiting groove, and a reset spring arranged at the end of the detection cross bar and in contact with the inner wall of the detection switch body; The limit bolt is maintained in the relative position of the detection switch body by rotational fixation. The limit bolt and the limit groove cooperate to limit the length of the end of the detection cross bar extending out of the detection switch body. The follow-up trigger assembly is installed on the outside of the detection cross bar. The end of the detection cross bar is pushed by external force to drive the follow-up trigger assembly to move horizontally. The follow-up trigger assembly triggers the travel switch assembly during the horizontal movement, and a trigger signal is sent out after the travel switch assembly is triggered.

2. The elevator car door blade to floor door sill gap detection switch as claimed in claim 1, characterized in that: The detection switch body includes two groups of outer shells, a switch inner chamber, two groups of sliding limit cavities and an observation port. The two groups of outer shells are butt-jointed and fixed, and the interior of the two groups of butt-jointed and fixed outer shells forms a switch inner chamber. The two groups of sliding limit cavities are respectively formed at the two ends of the inner chamber of the switch, and the sides of the two groups of butt-jointed and fixed outer shells form an observation port.

3. The elevator car door blade to floor door sill gap detection switch as claimed in claim 2, characterized in that: The detection cross bar is placed horizontally in the middle of the switch inner chamber, and the end of the detection cross bar extends through the observation port to the outside of the detection switch body. The limiting rod auxiliary slider is arranged inside the sliding limit cavity and is restricted by the limiting rod auxiliary slider. The detection cross bar forms a horizontal lateral sliding path under the cooperative restriction of the sliding limit cavity, the lateral movement limiting rod and the limiting rod auxiliary slider.

4. The elevator car door blade to floor door sill gap detection switch as claimed in claim 3, characterized in that: The spacing detection part also includes an auxiliary spring arranged at the end of the auxiliary sliding block of the limiting rod, and the inner wall of the outer shell is provided with a limiting hole matched with the auxiliary spring, and the end of the auxiliary spring is sleeved in the limiting hole.

5. The elevator car door blade to floor door sill gap detection switch as claimed in claim 4, characterized in that: The outer shell includes a limit indicating groove and a sliding avoidance groove, and the limit indicating groove and the sliding avoidance groove are opened in parallel in the middle of the outer shell, the limit bolt is installed inside the limit indicating groove, and the limit bolt maintains a relative position with the outer shell through a threaded connection, and the surface of the limit indicating groove is marked with an indicating scale, and the surface of the follow-up trigger assembly is formed with a sliding block that cooperates with the sliding avoidance groove, and the sliding block is sleeved in the sliding avoidance groove and is restricted by the sliding avoidance groove.

6. The elevator car door blade to floor door sill gap detection switch as claimed in claim 5, characterized in that: The travel switch assembly includes a switch seat, a limit spring and a travel switch. The side wall of the outer shell is provided with a through hole. The switch seat is sleeved in the through hole and restricted by the through hole. The limit spring is arranged between the switch seat and the inner wall of the detection switch body. The travel switch is fixed inside the switch seat.

7. The elevator car door blade to floor door sill gap detection switch as claimed in claim 6, characterized in that: The follower trigger assembly includes a follower trigger block and a fixing bolt. The follower trigger block is installed on the upper part of the detection cross bar. The fixing bolt is threadedly connected to the inside of the follower trigger block. The follower trigger block is fixed to the upper part of the detection cross bar under the restriction of the fixing bolt.

8. The elevator car door blade to floor door sill gap detection switch as claimed in claim 7, characterized in that: The outer shell also includes a fixing bolt groove, which is opened at the upper part of the outer shell. The side of the follower trigger block is nested in the fixing bolt groove and is restricted by the fixing bolt groove.

9. The elevator car door blade to floor door sill gap detection switch as claimed in claim 8, characterized in that: The detection switch body also includes an observation port, which is opened on the top of the outer shell. The opening position of the observation port corresponds to the side of the follow-up trigger block. An observation glass is arranged inside the observation port, and a magnet is arranged outside the detection switch body.

10. The method for using a switch for detecting the gap between the elevator car door blade and the landing door sill as claimed in claim 9, characterized in that: The following steps are included: Step S1, according to the allowable clearance range given by the elevator model to be inspected, the setting position of the limit bolt is set, the setting position of the limit bolt is consistent with the minimum value of the allowable clearance range, and under the cooperation of the limit bolt and the limit groove, the extension distance of the detection cross bar is the minimum value of the allowable clearance range; Step S2, fix the detection switch body to the elevator car door blade through a magnet, the detection cross bar inside the detection switch body faces the gap between the car door blade and the floor door sill, and connect the output end of the travel switch to the external signal transmitting device; Step S3, controlling the operation of the elevator. During the operation, the detection switch body at the elevator car door knife moves synchronously. When the detection switch body passes through the floor door sill and the gap width between the floor door sill and the elevator car door knife is less than the minimum value of the gap allowable range, the floor door sill will push the detection crossbar. During the horizontal movement, the detection crossbar will drive the travel switch pushed by the follow-up trigger component. After the travel switch is triggered, it controls the external signal transmitting device to send a signal. The floor that sends the signal is the problematic floor. Step S4, after the minimum value detection is completed, the setting position of the limit bolt is set again, the setting position of the limit bolt is consistent with the maximum value of the allowable range of the gap, and under the cooperation of the limit bolt and the limit groove, the extension distance of the detection cross bar is the maximum value of the allowable range of the gap; Step S5, control the operation of the elevator. During the operation, the detection switch body at the elevator car door knife moves synchronously. When the detection switch body passes through the floor door sill, the floor door sill will push the detection cross bar. The detection cross bar will drive the travel switch pushed by the follow-up trigger component during the horizontal movement. After the travel switch is triggered, it controls the external signal transmitting device to send a signal. The floor that sends the signal is the floor without problem. When the width of the gap between the floor door sill and the elevator car door knife is greater than the maximum value of the gap allowable range, the floor door sill cannot push the detection cross bar, and then cannot push the travel switch. The travel switch cannot control the external signal transmitting device to send a signal. The floor that does not send a signal is the floor with problem.

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