Clearance measuring device and elevator device

Abstract

A clearance measurement device that can be used to measure clearance at various sites is provided. [Solution] The measuring device 20 includes a first plate-shaped member 24, a second plate-shaped member 21, and a support device 23. The support device 23 supports the second plate-shaped member 21 so that the distance between surface 24b and surface 21a is variable. The support device 23 supports the second plate-shaped member 21 so that surface 21a comes into contact with surface 24b when the second plate-shaped member 21 approaches closest to the first plate-shaped member 24. The support device 23 supports the second plate-shaped member 21 so that the distance between surface 24b and surface 21a does not change unless an external force is applied to the second plate-shaped member 21 during clearance measurement.

Description

[Technical Field]

[0001] The present disclosure relates to a clearance measurement device and an elevator device. [Background technology]

[0002] Patent Document 1 describes a device for measuring the clearance between an elevator's counterweight and a buffer. The device described in Patent Document 1 includes an extension rod, a base, and an extension rod support. The extension rod has, for example, a telescopic structure. When a downward force greater than a standard value acts on the extension rod when the extension rod is in its shortest state, the lower end of the extension rod moves below the upper end of the buffer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-199394 Summary of the Invention [Problem to be solved by the invention]

[0004] In the device described in Patent Document 1, the telescopic rod section has a telescopic structure, and the telescopic rod section cannot be made shorter than the state shown in Figure 4(b) of Patent Document 1. For this reason, when the clearance is small, the device cannot be used, and there is a problem that the sites where the clearance can be measured are limited.

[0005] The present disclosure has been made to solve the above-mentioned problems. An object of the present disclosure is to provide a clearance measurement device that can be used to measure clearances at various work sites. Another object of the present disclosure is to provide an elevator system using such a measurement device. [Means for solving the problem]

[0006] A clearance measurement device according to the present disclosure is a measurement device for measuring the clearance between an elevator counterweight and a shock absorber. The measurement device includes: a first plate-like member having a first surface and a second surface facing in opposite directions and arranged so that the first surface faces the upper surface of the shock absorber when measuring the clearance; a second plate-like member having a third surface and a fourth surface facing in opposite directions and arranged so that the third surface faces the second surface and arranged above the first plate-like member when measuring the clearance; and a support device that supports the second plate-like member relative to the first plate-like member so that the distance between the second and third surfaces is variable and the third surface comes into contact with the second surface when the second plate-like member is closest to the first plate-like member, and so that the distance between the second and third surfaces does not change unless an external force is applied to the second plate-like member when measuring the clearance.

[0007] The elevator system according to the present disclosure includes a car and a counterweight that travel in a hoistway, a buffer disposed below the counterweight, and the measuring device. The first plate-shaped member is fixed to an upper end of the buffer. During normal operation in which the car responds to registered calls, the first plate-shaped member and the second plate-shaped member are overlapped with each other so that the third surface contacts the second surface. [Effects of the Invention]

[0008] The clearance measurement device according to the present disclosure can be used to measure clearance at various sites. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an example of an elevator device. [Figure 2] FIG. 2 is a diagram illustrating an example of a measurement device according to the first embodiment. [Figure 3] 10 is a flowchart showing an example of a method for measuring clearance. [Figure 4] FIG. 10 is a diagram showing an example in which a measuring device is attached to a shock absorber. [Figure 5] FIG. 10 is a diagram showing an example of the measuring device when the car stops at the top floor landing. [Figure 6] FIG. 4 is a diagram showing another example of the measurement device according to the first embodiment. [Figure 7] FIG. 4 is a diagram showing another example of the measurement device according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following detailed description will be given with reference to the drawings. Duplicate descriptions will be simplified or omitted as appropriate. In each drawing, the same reference numerals indicate the same or corresponding parts.

[0011] Embodiment 1 FIG. 1 is a diagram showing an example of an elevator apparatus. The elevator apparatus includes a car 1 and a counterweight 2. The car 1 moves up and down in a hoistway 3. The hoistway 3 is a vertically extending space formed in a building. The car 1 and the counterweight 2 are suspended in the hoistway 3 by a rope 4. The counterweight 2 moves in the hoistway 3 in the direction opposite to the direction in which the car 1 moves.

[0012] The rope 4 is wound around a drive sheave 6 of a hoisting machine 5. The hoisting machine 5 is controlled by a control device 7. When the drive sheave 6 rotates, the rope 4 moves in a direction corresponding to the direction in which the drive sheave 6 rotates. The car 1 moves up or down the hoistway 3 depending on the direction in which the rope 4 moves. The hoisting machine 5 is an example of a device that drives the car 1. The movement of the car 1 is controlled by the control device 7.

[0013] 1 shows a preferred example in which the hoisting machine 5 and the control device 7 are provided in the pit 3a of the hoistway 3. The hoisting machine 5 and the control device 7 may also be provided at the top of the hoistway 3. If a machine room is provided above the hoistway 3, the hoisting machine 5 and the control device 7 may also be installed in the machine room.

[0014] A landing 8 at which the car 1 can stop is provided on each floor of the building in which the elevator shaft 3 is formed. In FIG. 1, the car 1 stopped at the landing 8a on the top floor and the counterweight 2 at that time are shown by solid lines. Also in FIG. 1, the car 1 stopped at the landing 8b on the lowest floor and the car 1 stopped at the landing 8c on the floor one floor above the lowest floor are shown by dashed dotted lines. Below, an example will be described in which the lowest floor is the first floor and the top floor is the tenth floor.

[0015] An operation panel 9 is provided at the landing 8. The operation panel 9 has, for example, direction buttons. When the control device 7 is in normal operation, a landing call is registered by pressing the direction button on the operation panel 9. An operation panel 10 is provided at the car 1. The operation panel 10 has, for example, destination buttons. When the control device 7 is in normal operation, a car call is registered by pressing the destination button on the operation panel 10. During normal operation, the control device 7 causes the car 1 to respond to registered calls, i.e., landing calls and car calls. This allows elevator users to travel in the car 1 from one floor to another.

[0016] A shock absorber 11 for the car 1 and a shock absorber 12 for the counterweight 2 are provided in the pit 3a of the elevator shaft 3. The shock absorber 11 is disposed below the car 1. The shock absorber 12 is disposed below the counterweight 2. Fig. 1 shows an example in which the shock absorbers 11 and 12 are hydraulically operated. The shock absorbers 11 and 12 may be spring operated or may be a combined type using both springs and hydraulics.

[0017] The distance L formed between the counterweight 2 and the buffer 12 when the car 1 is stopped at the top floor landing 8a must be within a standard range for the safety of the elevator system. The distance L is called the clearance. For this reason, the distance L is measured during elevator system inspections, etc. The measuring device 20 for measuring the distance L will be described in detail below.

[0018] 2 is a diagram showing an example of the measurement device 20 according to the embodiment 1. With respect to the measurement device 20, the up and down are determined based on the orientation when measuring the distance L, that is, the orientation shown in FIG.

[0019] As an example, the measuring device 20 is a portable device. In such a case, the measuring device 20 can be attached to and detached from the shock absorber 12. The measuring device 20 includes, for example, a second plate-shaped member 21, a mounting portion 22, and a support device 23. The mounting portion 22 includes a first plate-shaped member 24 and a peripheral wall member 25.

[0020] The mounting portion 22 is a portion that is attached to the shock absorber 12 when the measuring device 20 is attached to or detached from the upper end of the shock absorber 12. The first plate-shaped member 24 has a surface 24a (first surface) and a surface 24b (second surface) that face in opposite directions. The outer shape of the first plate-shaped member 24, i.e., the shape when viewed from above, may be rectangular or circular. The outer shape of the first plate-shaped member 24 may also be other shapes.

[0021] The peripheral wall member 25 is provided on the edge of the first plate-shaped member 24. The peripheral wall member 25 is disposed so as to protrude downward from the surface 24a. The mounting portion 22 is formed as a whole in the shape of a box or cylinder that opens downward.

[0022] The second plate-shaped member 21 is disposed so as to be parallel to the first plate-shaped member 24. The second plate-shaped member 21 has a surface 21a (third surface) and a surface 21b (fourth surface) facing in opposite directions. The second plate-shaped member 21 is disposed so that the surface 21a faces the surface 24b of the first plate-shaped member 24. It is preferable that the outer shape of the second plate-shaped member 21 is the same as the outer shape of the first plate-shaped member 24.

[0023] The support device 23 is provided on the second plate-shaped member 21 and the mounting portion 22. The support device 23 is provided on the mounting portion 22 and supports the second plate-shaped member 21. That is, the second plate-shaped member 21 is supported relative to the first plate-shaped member 24 by the support device 23.

[0024] Specifically, the support device 23 supports the second plate-shaped member 21 so that the distance between the surface 24b and the surface 21a is variable. Furthermore, the support device 23 supports the second plate-shaped member 21 so that the distance between the surface 24b and the surface 21a does not change unless an external force is applied to the second plate-shaped member 21. It is preferable that the support device 23 supports the second plate-shaped member 21 so that the surface 21a comes into contact with the surface 24b when the second plate-shaped member 21 comes closest to the first plate-shaped member 24.

[0025] 2 shows an example in which the support device 23 achieves the above-mentioned functions by including a rod-shaped member 26 and a holding member 27. The upper end of the rod-shaped member 26 is provided on the second plate-shaped member 21. The rod-shaped member 26 is disposed so as to protrude downward from the surface 21a of the second plate-shaped member 21.

[0026] The holding member 27 is provided on the mounting portion 22. Fig. 2 shows a preferred example in which the holding member 27 is provided on the peripheral wall member 25. The holding member 27 may be provided on the first plate-like member 24. The holding member 27 holds the rod-like member 26 relative to the first plate-like member 24 so that the rod-like member 26 can be displaced in its longitudinal direction, i.e., in the up-down direction. Fig. 2 shows an example in which the support device 23 is provided with two sets of rod-like members 26 and holding members 27. The support device 23 may be provided with only one set of rod-like members 26 and holding members 27. The support device 23 may be provided with three or more sets of rod-like members 26 and holding members 27.

[0027] Next, a method for measuring the distance L, i.e., the clearance between the counterweight 2 and the buffer 12, will be described. FIG. 3 is a flowchart showing an example of a method for measuring the clearance. For example, the distance L is measured during regular inspections of the elevator system. Also, immediately after replacing the rope 4, the rope 4 is likely to stretch. For this reason, it is preferable to frequently measure the distance L immediately after replacing the rope 4.

[0028] An elevator maintenance worker gets into car 1 and stops car 1 at hall 8c, one floor above the lowest floor (the second floor) (S101). Before getting off car 1, the maintenance worker switches the operation mode inside car 1 from the automatic mode for normal operation to inspection mode (S102). In inspection mode, no hall call is registered even if a direction button is pressed at hall 8. No car call is registered even if a destination button is pressed inside car 1. In inspection mode, car 1 is moved manually by the maintenance worker.

[0029] The maintenance worker gets off the car 1 at the landing 8c and moves to the landing 8b on the lowest floor (first floor). The maintenance worker enters the inside of the elevator shaft 3, i.e., the pit 3a, from the landing 8b (S103). In the pit 3a, the maintenance worker attaches the measuring device 20 to the buffer 12 (S104).

[0030] FIG. 4 is a diagram showing an example in which the measuring device 20 is attached to the shock absorber 12. FIG. 4 shows a simple example in which the measuring device 20 is attached to the shock absorber 12 by arranging the attachment portion 22 so that it covers the upper end of the shock absorber 12. The measuring device 20 may further include a fixing member for fixing the first plate-shaped member 24 to the upper end of the shock absorber 12. The fixing member may be a bolt or a magnet. The fixing member may also be another member.

[0031] As shown in Fig. 4, the first plate-shaped member 24 is positioned so that the surface 24a faces the upper surface of the shock absorber 12 when the distance L is measured. It is preferable that the surface 24a be in contact with the upper surface of the shock absorber 12. Also, as shown in Fig. 4, the second plate-shaped member 21 is positioned above the first plate-shaped member 24 and the shock absorber 12 when the distance L is measured. Hereinafter, the state in which the surface 24a is positioned so as to face the upper surface of the shock absorber 12 is also referred to as the mounted state.

[0032] In S104, the maintenance technician places the mounting portion 22 on the upper end of the shock absorber 12, and then moves the second plate-shaped member 21 upward while the mounting portion 22 remains on the upper end of the shock absorber 12. That is, the maintenance technician moves the second plate-shaped member 21 upward relative to the first plate-shaped member 24. At this time, it is preferable that the second plate-shaped member 21 is positioned so that the distance between the surface 24b and the surface 21a is the greatest in the device.

[0033] As shown in FIG. 4, the maintenance worker attaches the measuring device 20 to the buffer 12 and then exits the elevator shaft 3 (S105). After exiting the elevator shaft 3, the maintenance worker moves to the second floor landing 8c, enters the car 1, and switches the operation mode from inspection mode to automatic mode (S106). Next, the maintenance worker presses the destination button on the operation panel 10 to register a car call for the top floor (10th floor). This causes the car 1 to start moving upward and stop at the top floor landing 8a (S107).

[0034] As described above, when the car 1 moves upward, the counterweight 2 moves downward. The counterweight 2 comes into contact with the second plate-shaped member 21 of the measuring device 20 from above just before the car 1 arrives at the landing 8a in S107. Note that the support device 23 supports the second plate-shaped member 21 so that the distance between the surface 24b and the surface 21a does not change even when measuring the distance L unless an external force is applied to the second plate-shaped member 21. For this reason, after the maintenance worker attaches the measuring device 20 to the buffer 12, the second plate-shaped member 21 continues to maintain the same position until the counterweight 2 comes into contact.

[0035] Even after coming into contact with the second plate-shaped member 21, the counterweight 2 continues to descend until the car 1 stops at the landing 8a. Therefore, the second plate-shaped member 21 moves downward by being pushed by the counterweight 2 from the time the counterweight 2 comes into contact with the second plate-shaped member 21 until the car 1 stops at the landing 8a. When the car 1 stops at the landing 8a, the downward movement of the second plate-shaped member 21 also stops.

[0036] 5 is a diagram showing an example of the measuring device 20 when the car 1 has stopped at the landing 8a on the top floor. In the state shown in FIG. 5, the second plate-like member 21 has been pushed downward by the counterweight 2, and the distance between the surface 24b and the surface 21a is shorter than in the state shown in FIG. 4.

[0037] When the maintenance worker stops car 1 at hall 8a, he measures the difference between the designed stopping position of car 1 and the actual stopping position of car 1 (S108). Next, similar to the procedure shown in S101 to S103, the maintenance worker stops car 1 at hall 8c, switches the operation mode to inspection mode, and then enters pit 3a from hall 8b (S109). In pit 3a, the maintenance worker measures the distance between first plate-like member 24 and second plate-like member 21 (S110).

[0038] When car 1 starts moving downward after stopping at hall 8a on the top floor in S107, counterweight 2 starts moving upward. Therefore, after car 1 starts moving downward, no external force acts on second plate-shaped member 21. The second plate-shaped member 21 remains in the state it was in when car 1 stopped at hall 8a. A maintenance worker can calculate distance L, i.e., clearance, based on the difference measured in S108 and the distance measured in S110 (S111).

[0039] In the measuring device 20 shown in this embodiment, the second plate-shaped member 21 is supported relative to the first plate-shaped member 24 so that the distance between the surface 24b and the surface 21a is variable. Also, as shown in FIG. 4 and other figures, the support device 23 is not positioned directly above the surface 24b when installed. That is, in the example shown in this embodiment, the rod-shaped member 26 does not overlap the first plate-shaped member 24 in a plan view, and the lower end of the rod-shaped member 26 is positioned to the side of the shock absorber 12 when installed. Therefore, the second plate-shaped member 21 can approach the first plate-shaped member 24 until the surface 21a comes into contact with the surface 24b. Therefore, the measuring device 20 shown in this embodiment can accommodate small clearances and can be used to measure clearances in a variety of locations.

[0040] 6 is a diagram showing another example of the measuring device 20 in the first embodiment. In the example shown in FIG. 6, the measuring device 20 includes the second plate-shaped member 21, the mounting portion 22, and the support device 23, similar to the above-described example. In this example, the elements included in the measuring device 20 other than the support device 23 are similar to those in the above-described example. For example, the measuring device 20 may further include a fixing member for fixing the first plate-shaped member 24 to the upper end of the shock absorber 12.

[0041] In the example shown in FIG. 6, the support device 23 includes a rod-shaped member 28 and a fixing member 29. The rod-shaped member 28 is extendable in the up-down direction. The upper end of the rod-shaped member 28 is attached to the second plate-shaped member 21. The rod-shaped member 28 is disposed so as to protrude downward from the surface 21a of the second plate-shaped member 21. The lower end of the rod-shaped member 28 is attached to the fixing member 29. The fixing member 29 is attached to the peripheral wall member 25 of the mounting portion 22. The fixing member 29 is an example of a member fixed to the first plate-shaped member 24.

[0042] 6, the support device 23 supports the second plate-shaped member 21 so that the distance between the surface 24b and the surface 21a is variable. Moreover, the support device 23 supports the second plate-shaped member 21 so that the distance between the surface 24b and the surface 21a does not change unless an external force is applied to the second plate-shaped member 21.

[0043] 6, the support device 23 is not positioned directly above the surface 24b in the installed state. Specifically, the rod-shaped member 28 does not overlap the first plate-shaped member 24 in a plan view, and the lower end of the rod-shaped member 28 is positioned to the side of the shock absorber 12 in the installed state. Therefore, the second plate-shaped member 21 can approach the first plate-shaped member 24 until the surface 21a contacts the surface 24b. In other words, the support device 23 supports the second plate-shaped member 21 so that the surface 21a contacts the surface 24b when the second plate-shaped member 21 is closest to the first plate-shaped member 24.

[0044] 7 is a diagram showing another example of the measuring device 20 in the first embodiment. The measuring device 20 shown in FIG. 7 includes a second plate-shaped member 21, a mounting portion 22, and a support device 23, similar to the examples described above. In this example, the elements included in the measuring device 20 other than the second plate-shaped member 21 are similar to any of the examples described above. For example, the measuring device 20 may further include a fixing member for fixing the first plate-shaped member 24 to the upper end of the shock absorber 12.

[0045] In the measuring device 20 shown in FIG. 7, the buffer cap 13 is detachably attached to the second plate-shaped member 21. The buffer cap 13 is a member for ensuring the safety of elevator maintenance personnel. The buffer cap 13 is attached to the second plate-shaped member 21 when, for example, a maintenance personnel needs to perform work on the car 1. FIG. 7 shows an example in which the lower end of the buffer cap 13 is fitted and fixed to the second plate-shaped member 21 by sliding the buffer cap 13 laterally. The buffer cap 13 may also be attached to the second plate-shaped member 21 by other methods.

[0046] The buffer cap 13 has, for example, a cylindrical or columnar portion. When the measuring device 20 is installed, the buffer cap 13 is attached to the second plate-like member 21, so that the buffer cap 13 protrudes upward from the surface 21b and is positioned directly above the shock absorber 12. In this state, the lowest position to which the counterweight 2 can descend is higher than the lowest position to which the counterweight 2 can descend when the buffer cap 13 is not attached to the second plate-like member 21. In other words, the descent of the counterweight 2 is inhibited by the buffer cap 13. For this reason, when the buffer cap 13 is attached to the second plate-like member 21, the highest position to which the car 1 can ascend can be lowered than the highest position to which the car 1 can ascend when the buffer cap 13 is not attached to the second plate-like member 21.

[0047] In this embodiment, an example has been described in which a maintenance worker carries measuring device 20 and can use measuring device 20 to measure clearance at various work sites. As another example, measuring device 20 may be permanently installed in an elevator system. In such a case, first plate-like member 24 is fixed to the upper end of shock absorber 12. First plate-like member 24 may be fixed directly to the upper end of shock absorber 12, or may be fixed via peripheral wall member 25.

[0048] Furthermore, when the clearance is measured, the second plate-shaped member 21 is moved upward relative to the first plate-shaped member 24. During normal operation of the control device 7, the first plate-shaped member 24 and the second plate-shaped member 21 are preferably arranged so that the surface 21a contacts the surface 24b.

[0049] Examples of aspects that may be included in the present disclosure are set forth below as appendices.

[0050] [Appendix 1] A measuring device for measuring the clearance between an elevator counterweight and a buffer, a first plate-like member having a first surface and a second surface facing in opposite directions, the first surface being disposed so as to face an upper surface of the shock absorber when measuring the clearance; a second plate-like member having a third surface and a fourth surface facing in opposite directions, the third surface being disposed opposite the second surface, and the second plate-like member being disposed above the first plate-like member when measuring the clearance; a support device that supports the second plate-shaped member relative to the first plate-shaped member so that the distance between the second surface and the third surface is variable, the third surface comes into contact with the second surface when the second plate-shaped member is closest to the first plate-shaped member, and the distance between the second surface and the third surface does not change unless an external force is applied to the second plate-shaped member during measurement of the clearance; A clearance measuring device equipped with: [Appendix 2] A clearance measuring device as described in Appendix 1, wherein the support device is positioned so that the first surface faces the upper surface of the buffer, and is not positioned directly above the second surface. [Appendix 3] The support device includes: a rod-shaped member having an upper end provided on the second plate-shaped member; a holding member that holds the rod-shaped member so that the rod-shaped member can be displaced in a longitudinal direction relative to the first plate-shaped member; Equipped with A clearance measuring device as described in Appendix 1, in which the lower end of the rod-shaped member is positioned to the side of the shock absorber with the first surface facing the upper surface of the shock absorber. [Appendix 4] The support device includes an extendable rod-shaped member, A clearance measuring device as described in Appendix 1, wherein the rod-shaped member has an upper end attached to the second plate-shaped member and a lower end attached to a member fixed to the first plate-shaped member, and the first surface is positioned so as to face the upper surface of the buffer, but is not positioned directly above the second surface. [Appendix 5] a buffer cap is detachably attached to the second plate-shaped member; When the buffer cap is attached to the second plate-shaped member, the buffer cap protrudes upward from the fourth surface and is positioned directly above the shock absorber, with the first surface being positioned to face an upper surface of the shock absorber, 5. The clearance measuring device according to claim 1, wherein when the buffer cap is attached to the second plate-like member, the lowest position to which the counterweight can be lowered with the first surface positioned so as to face the upper surface of the shock absorber is higher than the lowest position to which the counterweight can be lowered when the buffer cap is not attached to the second plate-like member. [Appendix 6] 6. The clearance measuring device according to any one of claims 1 to 5, further comprising a fixing member for fixing the first plate-shaped member to an upper end of the shock absorber. [Appendix 7] a car and a counterweight that travel in the elevator shaft; a shock absorber disposed below the counterweight; The measurement device according to any one of Supplementary Note 1 to Supplementary Note 6; Equipped with the first plate-shaped member is fixed to an upper end of the shock absorber, an elevator apparatus in which the first plate-shaped member and the second plate-shaped member are arranged to overlap each other so that the third surface contacts the second surface during normal operation in which the car responds to registered calls. [Explanation of symbols]

[0051] REFERENCE SIGNS LIST 1 car, 2 counterweight, 3 elevator shaft, 3a pit, 4 rope, 5 hoist, 6 driving sheave, 7 control device, 8 landing, 9 operation panel, 10 operation panel, 11 buffer, 12 buffer, 13 buffer cap, 20 measuring device, 21 second plate-shaped member, 21a surface, 21b surface, 22 mounting portion, 23 support device, 24 first plate-shaped member, 24a surface, 24b surface, 25 peripheral wall member, 26 rod-shaped member, 27 holding member, 28 rod-shaped member, 29 fixing member

Claims

1. A measuring device for measuring the clearance between an elevator counterweight and a buffer, a first plate-like member having a first surface and a second surface facing in opposite directions, the first surface being disposed so as to face an upper surface of the shock absorber when measuring the clearance; a second plate-like member having a third surface and a fourth surface facing in opposite directions, the third surface being disposed opposite the second surface, and the second plate-like member being disposed above the first plate-like member when measuring the clearance; a support device that supports the second plate-like member relative to the first plate-like member so that the distance between the second surface and the third surface is variable, the third surface comes into contact with the second surface when the second plate-like member is closest to the first plate-like member, and the distance between the second surface and the third surface does not change unless an external force is applied to the second plate-like member during measurement of the clearance; A clearance measuring device equipped with:

2. The clearance measuring device according to claim 1 , wherein the support device is arranged so that the first surface faces the upper surface of the shock absorber, and is not arranged directly above the second surface.

3. The support device includes: a rod-shaped member having an upper end provided on the second plate-shaped member; a holding member that holds the rod-shaped member so as to be displaceable in a longitudinal direction relative to the first plate-shaped member; Equipped with The clearance measuring device according to claim 1 , wherein the lower end of the rod-shaped member is disposed to the side of the shock absorber with the first surface facing an upper surface of the shock absorber.

4. The support device includes an extendable rod-shaped member, The clearance measuring device described in claim 1, wherein the rod-shaped member has an upper end attached to the second plate-shaped member and a lower end attached to a member fixed to the first plate-shaped member, and the first surface is positioned so as to face the upper surface of the buffer, but is not positioned directly above the second surface.

5. a buffer cap is detachably attached to the second plate-shaped member; When the buffer cap is attached to the second plate-like member, the buffer cap protrudes upward from the fourth surface and is positioned directly above the shock absorber, with the first surface being positioned to face an upper surface of the shock absorber, 5. The clearance measuring device according to claim 1, wherein when the buffer cap is attached to the second plate-like member, the lowest position to which the counterweight can be lowered with the first surface positioned so as to face the upper surface of the shock absorber is higher than the lowest position to which the counterweight can be lowered when the buffer cap is not attached to the second plate-like member.

6. The clearance measuring device according to claim 1 , further comprising a fixing member for fixing the first plate-like member to an upper end of the shock absorber.

7. a car and a counterweight that travel in the elevator shaft; a shock absorber disposed below the counterweight; The measuring device according to any one of claims 1 to 4; Equipped with the first plate-shaped member is fixed to an upper end of the shock absorber, an elevator apparatus in which the first plate-shaped member and the second plate-shaped member are arranged to overlap each other so that the third surface contacts the second surface during normal operation in which the car responds to registered calls.

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