JP2010018423A - Derailment detecting device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a derailment detecting device for elevator capable of accurately detecting that an elevator is out of a guide rail. <P>SOLUTION: A contact element 21 is fitted to a first guide shoe 18. With this structure, the contact element 21 can be integrally displaced with the first guide shoe 18 along a first guide rail 4. The contact element 21 has a support member 22 and a ring-like contact member 23. The support member 22 is supported by an end part of the first guide shoe 18. The contact member 23 is provided in a tip part of the support member 22. A detecting wire 11 is passed through the center part of the contact member 23. The contact member 23 is brought into contact with the detecting wire 11 when the first guide shoe 18 is derailed from the first guide rail 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator derailment detection device that detects that a lifting body such as a car or a counterweight has come off from a guide rail.

  In a conventional elevator derailment detection device, first and second contact arms are mounted on a counterweight that is raised and lowered along first and second guide rails, and in the vicinity of the first and second guide rails. The first and second piano wires are stretched to each other, and by detecting that the first and second contact arms are in contact with at least one of the first and second piano wires, A detection unit that detects that the counterweight is removed from the first and second guide rails is connected to the first and second piano wires (see, for example, Patent Document 1).

JP 2003-321169 A

  In the conventional elevator derailing detection apparatus configured as described above, the first and second contact arms are mounted on the counterweight, but the counterweight and the first and second guide rails Due to the spring provided between them, even if the first and second guide rails are slightly bent, if the counterweight receives an exciting force, the first and second contact arms are displaced in the first and second directions. Since the second piano wire is contacted, it may be erroneously detected that the counterweight is disengaged from the first and second guide rails.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an elevator derailing detection device that can more accurately detect that the lifting body has come off the guide rail. To do.

  An elevator derailment detection apparatus according to the present invention includes a detection line disposed in parallel with a guide rail in the vicinity of a guide rail that guides the lifting and lowering of the lifting body, and is attached to the lifting body via an elastic body. A contact body that is attached to a guide shoe and that comes into contact with the detection line when the guide shoe is detached from the guide rail, and is connected to the detection line and detects that the contact body has come into contact with the detection line. A detection unit that detects that the lifting body has been detached is provided.

  In the elevator derailing detection device according to the present invention, since the contact body is attached to the guide shoe that engages with the guide rail, the elevating body is greatly displaced in the horizontal direction due to the bending force of the guide rail when it is raised and lowered. Even in this case, the displacement of the contact body is small, and erroneous detection due to the horizontal displacement of the lifting body is prevented. Therefore, it is possible to more accurately detect that the lifting body has come off the guide rail.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a main part of an elevator according to Embodiment 1 of the present invention. In FIG. 1, a counterweight 2 as a lifting body is suspended in a hoistway 1 by a plurality of ropes 3. A cage (not shown) is suspended by a plurality of ropes 3 in the hoistway 1. On the side wall in the hoistway 1, first and second guide rails 4, 5 parallel to each other are provided. The counterweight 2 is raised and lowered along the first and second guide rails 4 and 5. A machine room (not shown) is provided above the hoistway 1. A shock absorber base 6 is provided at the lower part of the hoistway 1. A shock absorber 7 is provided on the top of the shock absorber base 6.

  A fixing bracket 8 is fixed to the end portion of the first guide rail 4. An upper tension load spring 9 is supported at the lower part of the fixing bracket 8. A tension detecting device 10 as a detecting unit is provided on the upper part of the shock absorber table 6 so as to face the fixing bracket 8. A detection line 11 is stretched between the upper tension load spring 9 and the tension detection device 10 in parallel with the first guide rail 4. The upper tension load spring 9 applies a constant tension to the detection line 11. The tension detection device 10 can detect that the counterweight 2 has come off the first guide rail 4 by detecting a change in the tension of the detection line 11.

  First and second upper guide devices 12 and 13 are provided on both upper sides of the counterweight 2. Further, first and second lower guide devices 14 and 15 are provided on both lower sides of the counterweight 2.

  FIG. 2 is a sectional view taken along line II-II in FIG. The first upper guide device 12 includes a first frame 16 having a U-shaped cross section, a first elastic body 17, and a first guide shoe 18 having a U-shaped cross section. The first frame 16 is attached to the upper part of the counterweight 2. The first elastic body 17 includes a first vibration isolation spring 19 and a first vibration isolation rubber 20. One end of the first vibration isolation spring 19 is supported by the end 16 a of the first frame 16. The other end portion of the first vibration isolation spring 19 is supported by the end portion of the first guide shoe 18 facing the end portion 16 a of the first frame 16. The first guide shoe 18 is engaged with the first guide rail 4. The first anti-vibration rubber 20 is connected between the opposite end portions of the first frame 16 and the opposite end portions of the first guide shoe 18. The configuration of the first lower guide device 14 is the same as that of the first upper guide device 12.

  A contact body 21 is attached to the first guide shoe 18. Thereby, the contact body 21 can be displaced along the first guide rail 4 integrally with the first guide shoe 18. The contact body 21 includes a support member 22 and a ring-shaped contact member 23. The support member 22 is supported by the end portion of the first guide shoe 18. The contact member 23 is provided at the distal end portion of the support member 22. The detection line 11 is passed through the central portion of the contact member 23. The contact member 23 comes into contact with the detection line 11 when the first guide shoe 18 is detached from the first guide rail 4.

  The second upper guide device 13 includes a second frame 24 having a U-shaped cross section, a second elastic body 25, and a second guide shoe 26 having a U-shaped cross section. The second frame 24 is attached to the upper part of the counterweight 2. The second elastic body 25 includes a second vibration isolation spring 27 and a second vibration isolation rubber 28. One end of the second vibration isolation spring 27 is supported by the end 24 a of the second frame 24. The other end of the second vibration isolating spring 27 is supported by the end of the second guide shoe 26 facing the end 24 a of the second frame 24. The second guide shoe 26 is engaged with the second guide rail 5. The second anti-vibration rubber 28 is connected between the opposite end portions of the second frame 24 and the opposite end portions of the second guide shoe 26. The configuration of the second lower guide device 15 is the same as that of the first upper guide device 13.

  3 is a side view showing a state in which the counterweight of FIG. 1 is displaced to the left, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. The first anti-vibration spring 19 is pushed by the first frame 16 and is contracted. The first anti-vibration rubber 20 is pulled by the first frame 16 in the same direction as the moving direction of the counterweight 2. On the contrary, the second vibration-proof spring 27 is pulled by the second frame 24 and extends. The second vibration isolating rubber 28 is pulled by the second frame 24 in the same direction as the moving direction of the counterweight 2. That is, the counterweight 2 and the first and second frames 16 and 24 extend and contract the first and second elastic bodies 17 and 25 by an excitation force generated by bending of the first and second guide rails. By doing so, it can be displaced in the horizontal direction.

  In such an elevator derailing detection device, the contact body 21 is attached to the first guide shoe 18 that engages with the first guide rail 4, so that the counterweight 2 is moved in the first and second directions at the time of raising and lowering. Even when the guide rails 4 and 5 are subjected to an excitation force due to the bending of the guide rails 4 and 5 and greatly displaced in the horizontal direction, the displacement of the contact member 23 is small, and erroneous detection due to the horizontal displacement of the counterweight 2 is prevented. Accordingly, it is possible to more accurately detect that the counterweight 2 is disengaged from the first guide rail 4.

  Moreover, since the detection line 11 is provided in the vicinity of the 1st guide rail 4, it can prevent contacting the detection line 11 accidentally at the time of the maintenance inspection of an elevator.

Embodiment 2. FIG.
Next, FIG. 5 is a block diagram showing a main part of an elevator according to Embodiment 2 of the present invention, and FIG. 6 is a sectional view taken along line VI-VI in FIG. In this example, a contact body 34 having the same configuration as the contact body 21 attached to the first guide shoe 18 in the first embodiment is attached to the second guide shoe 26.

  A lower tension load spring 29 is fixed to the upper portion of the shock absorber base 6. First and second upper brackets 30 and 31 are fixed to end portions of the first and second guide rails 4 and 5. First and second upper pulleys 32 and 33 as vehicles are attached to the first and second upper brackets 30 and 31, respectively. The first and second upper pulleys 32 and 33 are rotatable around one end portion of the first and second upper brackets 30 and 31.

  One end of the detection line 11 is connected to the tension detection device 10 and is disposed in parallel with the first guide rail 4. The other end of the detection line 11 is connected to the lower tension load spring 29 and arranged in parallel with the second guide rail 5. The detection line 11 is wound around the first and second upper pulleys 32 and 33.

  A contact body 34 is attached to the second guide shoe 26. Thereby, the contact body 34 can be displaced along the second guide rail 5 integrally with the second guide shoe 26. The contact body 34 includes a support member 35 and a ring-shaped contact member 36. The support member 35 is supported by the end portion of the second guide shoe 26. The contact member 36 is provided at the distal end portion of the support member 35. The detection line 11 is passed through the central portion of the contact member 36. The contact member 36 comes into contact with the detection line 11 when the second guide shoe 26 is detached from the second guide rail 5. Other configurations are the same as those in the first embodiment.

  In such an elevator derailing detection device, since the contact bodies 21 and 34 are attached to the first and second guide shoes 18 and 26 that engage with the first and second guide rails 4 and 5, Even when the counterweight 2 is greatly displaced in the horizontal direction due to the bending force of the first and second guide rails 4 and 5 when it is raised and lowered, the displacement of the contact members 23 and 36 is small, and the counterweight 2 Misdetection due to horizontal displacement of is prevented. Accordingly, it is possible to more accurately detect that the counterweight 2 is disengaged from at least one of the first and second guide rails 4 and 5.

  Further, by winding the detection line 11 around the first and second upper pulleys 32 and 33, the tension detecting device is applied to the contact bodies 21 and 34 attached to the first and second guide shoes 18 and 26. 10, the detection line 11 and the lower tension load spring 29 can be constituted by one.

Embodiment 3 FIG.
Next, FIG. 7 is a block diagram showing a main part of an elevator according to Embodiment 3 of the present invention, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. A lower bracket 37 is fixed to the end portion of the second guide rail 5. A lower pulley 38 is attached to the lower bracket 37. The lower pulley 38 can rotate around one end of the lower bracket 37. A potential detection device 39 as a detection unit is fixed to the upper part of the shock absorber base 6.

  The conductive detection line 40 as a detection line is arranged in parallel with the first and second guide rails 4 and 5. One end of the conductive detection line 40 is connected to the upper portion of the potential detection device 39. The other end of the conductive detection line 40 is connected to the side of the potential detection device 39. The conductivity detection line 40 is wound around the first and second upper pulleys 32 and 33 and the lower pulley 38. Thereby, the conductive detection line 40 is looped with respect to the potential detection device 39.

  The potential detection device 39 detects the change in the current value caused by the contact of the contact members 23 and 36 with the conductive detection line 40 to which a certain weak current is applied, so that the counterweight 2 is the first and first. It can be detected that the guide rails 4 and 5 are disconnected from at least one of the two guide rails 4 and 5. Other configurations are the same as those in the second embodiment.

  In such an elevator derailing detection device, since the contact bodies 21 and 34 are attached to the first and second guide shoes 18 and 26 that engage with the first and second guide rails 4 and 5, Even when the counterweight 2 is greatly displaced in the horizontal direction due to the bending force of the first and second guide rails 4 and 5 when it is raised and lowered, the displacement of the contact members 23 and 36 is small, and the counterweight 2 Misdetection due to horizontal displacement of is prevented. Accordingly, it is possible to more accurately detect that the counterweight 2 is disengaged from at least one of the first and second guide rails 4 and 5.

In the above example, the tension detection device 10 and the potential detection device 39 are provided on the upper part of the shock absorber base 6. For example, when a machine room is provided above the hoistway 1, the floor of the machine room is provided. The tension detecting device 10 and the potential detecting device 39 may be provided in the lower part of the head.
In the above example, the tension weight detection device 10 and the potential detection device 39 detect that the contact members 23 and 36 are in contact with the detection line 11 and the conductive detection line 40, so that the counterweight 2 is the first. And the second guide rails 4 and 5 are detected to be disengaged from each other. For example, the contact members 23 and 36 are sharpened, and the detection lines 11 and the conductive detection lines 40 are broken. Thus, it may be detected that the counterweight 2 is disengaged from at least one of the first and second guide rails 4 and 5.
Furthermore, in the above-described example, the elevator derailing detection device for the counterweight 2 is shown, but the present invention can also be applied as a car derailing detection device.
Furthermore, in the above example, the contact bodies 21 and 34 are attached to the guide shoes 18 and 26 engaged with the first and second guide rails 4 and 5, but for example, the first and second guides are used. It may be attached to a roller type roller guide that runs along the rails 4 and 5.

It is a block diagram which shows the principal part of the elevator by Embodiment 1 of this invention. It is sectional drawing which follows the II-II line | wire of FIG. It is a side view which shows the state which the counterweight of FIG. 1 displaced to the left. It is sectional drawing which follows the IV-IV line of FIG. It is a block diagram which shows the principal part of the elevator by Embodiment 2 of this invention. It is sectional drawing which follows the VI-VI line of FIG. It is a block diagram which shows the principal part of the elevator by Embodiment 3 of this invention. It is sectional drawing which follows the VIII-VIII line of FIG.

Explanation of symbols

  2 Balance weight (lifting body), 4 1st guide rail (guide rail), 5 2nd guide rail (guide rail), 10 Tension detection device (detection part), 11 Detection line, 17 Elastic body, 18 First 1 guide shoe (guide shoe), 21 contact body, 25 elastic body, 26 second guide shoe (guide shoe), 32 first upper pulley (car), 33 second upper pulley (car), 34 contact Body, 38 Lower pulley (car), 39 Potential detection device (detection unit), 40 Conductivity detection line (detection line).

Claims (2)

A detection line arranged in parallel with the guide rail in the vicinity of the guide rail for guiding the raising and lowering of the lifting body,
A contact body that is attached to the elevating body via an elastic body and is attached to a guide shoe that engages with the guide rail. An elevator derailing detection device comprising: a detecting section that detects that the lifting body is detached from the guide rail by detecting that the contact body is in contact with the detection line. . The guide rail has a first guide rail and a second guide rail parallel to the first guide rail,
A first vehicle is provided at an end portion of the first guide rail, and a second vehicle facing the first vehicle is provided at an end portion of the second guide rail. 2. The elevator derailing detection apparatus according to claim 1, wherein the detection line is wound around the first and second vehicles.

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