Elevator steel wire rope flaw detection device

Abstract

The invention provides a steel wire rope flaw detection device for an elevator, which can enable a flaw detection part to reliably track according to the displacement of a steel wire rope. A wire rope flaw detection device (10) is provided with an inspection unit (2) and a support unit (30) that supports the inspection unit (2). The support unit (30) is provided with a mounting bracket (31), a first support part (35), a second support part (36), a third support part (37), and a support bar (32). And the mounting bracket (31) is arranged in a lifting channel provided with an elevator. The first support section (35) is provided to the mounting bracket (31). The second support section (36) is rotatably connected to the first support section (35) via a rotating section (34). The third support section (37) is telescopically connected to the second support section (36) via a telescopic connection section (33). The support bar (32) is attached to the third support section (37) and supports the inspection unit (2).

Description

Technical Field

[0001] The invention relates to a steel wire rope flaw detection device for an elevator. Background Art

[0002] Generally, the main rope of an elevator is formed by twisting a plurality of strands of steel wires (hereinafter referred to as "wires") together. Such a main rope (wire rope) gradually breaks due to fatigue and wear caused by bending and contact when passing through the sheave of the hoist. When the number of wire breaks exceeds a predetermined reference value, the main rope is replaced.

[0003] Therefore, it is necessary to measure the number of wire breaks through regular inspection to evaluate whether the main sling can be used safely. Moreover, the criterion of the number of breaks is determined by the number of wire breaks per unit length, which is determined by the structure of the main sling (number of strands, wire diameter, etc.).

[0004] As a method for investigating the damage state of the wire rod, for example, a flaw detection device using a leakage flux method is used. The leakage flux method is a method of magnetizing the main rope in the longitudinal direction and detecting the magnetic flux leaking from the broken wire rod portion (hereinafter referred to as the damaged portion) with a sensor to check whether there is a break.

[0005] As such a prior art, there is a technology described in Patent Document 1, for example. Patent Document 1 describes a pair of first supports mounted on a machine table, a second support provided on these first supports, and a fourth support provided on one side so as to be rotatable on the second support. In addition, Patent Document 1 describes a technology comprising: a third support having a structure in which a relative distance between one side and the other side is variable; a fourth support provided on the other side of the third support and supporting a sling tester; and a fifth support provided on the other side of the third support in a positionally adjustable manner and having a structure capable of contacting the sling tester.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2012-56657 Summary of the invention

[0009] Problems to be solved by the invention

[0010] In addition, when the main hoisting rope, i.e., the wire rope, moves, as the elevator car, counterweight, or pulley provided on the elevator car or counterweight approaches the sheave of the hoist, the wire rope has an angle called a free angle, and the wire rope is greatly displaced. However, in the technology described in Patent Document 1, although the flaw detection unit can track the slight vibration and swing of the wire rope, it cannot track the large displacement of the wire rope caused by the free angle. As a result, in the technology described in Patent Document 1, there is a problem that the flaw detection unit is separated from the wire rope and a stable inspection cannot be performed.

[0011] In view of the above problems, an object of the present invention is to provide a wire rope flaw detection device for an elevator, which can reliably track the flaw detection part according to the displacement of the wire rope.

[0012] Means for solving problems

[0013] In order to solve the above-mentioned problems and achieve the present purpose, a wire rope flaw detection device for an elevator is a wire rope flaw detection device for inspecting the wire rope of an elevator. The wire rope flaw detection device comprises: an inspection unit having a flaw detection portion for inspecting damage to the wire rope; and a support unit for supporting the inspection unit. The support unit comprises a mounting bracket, a first support portion, a second support portion, a third support portion, and a support rod. The mounting bracket is disposed in a lifting passage in which an elevator is disposed. The first support portion is disposed on the mounting bracket. The second support portion is rotatably connected to the first support portion via a rotating portion. The third support portion is telescopically connected to the second support portion via a telescopic connecting portion. The support rod is mounted on the third support portion to support the inspection unit.

[0014] Effects of the Invention

[0015] According to the wire rope flaw detection device for an elevator having the above-described structure, the flaw detection unit can reliably track the displacement of the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic configuration diagram showing an example of an elevator using the wire rope flaw detection device according to the embodiment.

[0017] Figure 2 It is a schematic structural diagram showing another example of an elevator using the wire rope flaw detection device according to the embodiment.

[0018] Figure 3 It is a perspective view showing a wire rope flaw detection device according to an embodiment.

[0019] Figure 4 It is a perspective view showing a wire rope flaw detection device according to an embodiment.

[0020] Figure 5 It is a side view showing the inspection unit of the wire rope flaw detection device according to the embodiment.

[0021] Figure 6 This is a top view of the car side pulley, counterweight side pulley, main hoisting rope, and wire rope flaw detection device viewed from above.

[0022] Figure 7 A and Figure 7 B is a diagram showing the positional relationship between the car-side pulley, the counterweight-side pulley, and the hoisting machine when the main rope is moved.

[0023] Explanation of symbols

[0024] 1, 1B: elevator; 2: inspection unit; 3: flaw detection unit; 10: wire rope flaw detection device; 11: fixing screw; 12: locking component; 13: connecting fixture; 14: force-applying component; 15: bracket; 16: spring seat; 17: connecting rod; 18: threaded hole; 19: cutout; 20: rotation support; 21: joint; 22: stopper; 30: support unit; 31: mounting bracket; 32: support rod; 33: telescopic connection; 34: rotation; 35: first Supporting part; 36: second supporting part; 36a, 37a: telescopic opening; 37: third supporting part; 38: elastic member; 41: fixing part; 100: hoist; 110: lifting channel; 120: car; 121: car side pulley; 130: main hoisting rope (wire rope); 131: one end; 132: the other end; 141: counterweight side pulley; 180: machine beam; 200: building structure; 201: boarding and alighting area; 240: side guide rail; 250: base. DETAILED DESCRIPTION

[0025] Below, refer to Figure 1 to Figure 7 B. The wire rope flaw detection device for an elevator according to the embodiment will be described. In addition, in each figure, the same reference numerals are given to common components.

[0026] 1. Implementation Example

[0027] 1-1.1:1 sling elevator

[0028] First, refer to Figure 1 as well as Figure 2 An example of the structure of an elevator to which the wire rope flaw detection device according to the embodiment example (hereinafter referred to as "this example") is applied will be described.

[0029] 1-1.1:1 sling elevator

[0030] Reference Figure 1 As an example of an elevator, the structure of a 1:1 rope elevator is described. Figure 1 It is a structural diagram showing a 1:1 cable elevator.

[0031] Figure 1The elevator 1 shown is an elevator having a machine room 160 at the top of a lift passage 110. In addition, a pit 111 is provided at the bottom of the lift passage 110. A buffer, etc., not shown, is arranged in the pit 111. In addition, the elevator 1 is installed in the lift passage 110 formed in a building structure 200. Furthermore, a boarding and alighting area 201 is provided on a floor where the car 120 stops in the building structure 200.

[0032] The elevator 1 performs a vertical movement in a vertical path 110 , and includes a car 120 for carrying people and cargo, a main rope 130 which is an example of a wire rope, a counterweight 140 , and a hoisting machine 100 .

[0033] The hoisting machine 100 is arranged in the machine room 160. The main rope 130 is wound around the sheave of the hoisting machine 100. Then, the car 120 is raised and lowered by driving the hoisting machine 100. In addition, a deflector pulley 150 on which the main rope 130 is mounted is provided near the hoisting machine 100. In addition, a control panel 190 for controlling the elevator 1 is arranged in the machine room 160.

[0034] One axial end of the main rope 130 is connected to the upper part of the elevator car 120, and the other axial end of the main rope 130 is connected to the upper part of the counterweight 140. Therefore, the elevator car 120 is connected to the counterweight 140 via the main rope 130. In addition, a plurality of main ropes 130 are provided. And the plurality of main ropes 130 are respectively connected to the elevator car 120 and the counterweight 140, and are wound around the sheave of the hoisting machine 100.

[0035] By driving the hoist 100, the car 120 is raised and lowered in the lifting passage 110 along the car side guide rails not shown, and the counterweight 140 is raised and lowered in the lifting passage 110 along the counterweight side guide rails not shown. The direction in which the car 120 and the counterweight 140 are raised and lowered is defined as the up-down direction. In addition, the up-down direction is parallel to the vertical direction.

[0036] 1-2.2:1 sling elevator

[0037] Next, refer to Figure 2 As another example of an elevator, the structure of a 2:1 rope elevator is described. Figure 2 It is a structural diagram showing a 2:1 sling elevator.

[0038] In addition, Figure 1 The same parts of the 1:1 rope elevator 1 are denoted by the same reference numerals, and repeated description is omitted.

[0039] Figure 2 The elevator 1B shown is an elevator in which a machine room 160 is not provided at the top of the lifting passage 110. In addition, a pit 111 is provided at the bottom of the lifting passage 110. Figure 2 As shown, the elevator 1B includes a hoist 100, a car 120, a main rope 130, and a counterweight 140, which are installed in a hoistway 110 or a pit 111. In addition, the elevator 1B includes a first pulley 171 and a second pulley 172.

[0040] A car-side pulley 121 is provided at the lower portion of the car 120. In addition, the counterweight 140 has a counterweight-side pulley 141. The main rope 130 is wound around the car-side pulley 121 and the counterweight-side pulley 141.

[0041] The first pulley 171 and the second pulley 172 are provided on the machine beam 180 provided at the top of the lifting passage 110. One end 131 and the other end 132 of the main rope 130 are fixed to the top of the lifting passage 110. And the main rope 130 is wound around the car side pulley 121, the first pulley 171, the sheave of the hoisting machine 100, the second pulley 172, and the counterweight side pulley 141 in sequence from the other end 132. In addition, a plurality of main ropes 130 are provided. And the plurality of main ropes 130 are wound around the car side pulley 121, the first pulley 171, the sheave of the hoisting machine 100, the second pulley 172, and the counterweight side pulley 141, respectively.

[0042] In addition, Figure 2 In the illustrated example, the hoisting machine 100 is provided at the lower portion of the hoistway 110 , but the present invention is not limited thereto. The hoisting machine 100 may be provided on a machine beam 180 provided at the top of the hoistway 110 .

[0043] The main rope 130 of the elevator 1, 1B is generally formed by twisting a plurality of stranded wires (hereinafter referred to as "wires") together. The main rope 130 is regularly inspected for safety by counting the number of wire breaks using a wire rope flaw detector 10 described later.

[0044] 2.Wire rope flaw detection device

[0045] Next, refer to Figures 3 to 5 The structure of the wire rope flaw detection device 10 which is a device for inspecting the state of the main rope 130 of the elevator 1, 1B will be described.

[0046] Figure 3 as well as Figure 4 1 is a perspective view showing a wire rope flaw detection device 10. Figure 5 FIG. 2 is a side view showing the inspection unit 2 of the wire rope flaw detection device 10. Figure 3 In the example shown, only one inspection unit 2 described later is shown. Figure 4In the illustrated example, a mounting bracket 31 , a first support portion 35 , a second support portion 36 , and a third support portion 37 of a support unit 30 described later are omitted and illustrated.

[0047] like Figure 3 as well as Figure 4 As shown, the wire rope flaw detection device 10 has a plurality of inspection units 2 and a support unit 30. The support unit 30 has a mounting bracket 31, a support rod 32, a first support portion 35, a second support portion 36, a third support portion 37 and an elastic member 38 (see Figure 4 ). In addition, the support unit 30 has a rotating portion 34 and a telescopic connecting portion 33.

[0048] [Support unit]

[0049] The support unit 30 is arranged near the base 250 on which the hoisting machine 100 is installed. The mounting bracket 31 of the support unit 30 is provided, for example, on the car side rail 240 that slidably supports the car 120. In addition, the location where the mounting bracket 31 is provided is not limited to the car side rail 240. The location where the mounting bracket 31 is provided may also be provided on a machine base provided in the hoistway 110, a counterweight side rail that slidably supports the counterweight 140, the car 120, the counterweight 140, and the like.

[0050] The mounting bracket 31 is provided with a first support portion 35, which is bent from the mounting bracket 31 and protrudes toward the main sling 130. The first support portion 35 is formed in a substantially flat plate shape. The end of the first support portion 35 on the opposite side of the mounting bracket 31 is connected to the second support portion 36 via the rotating portion 34. The second support portion 36 is rotatably supported by the first support portion 35 via the rotating portion 34.

[0051] In addition, an elastic member such as a torsion coil spring or a leaf spring (not shown) is provided on the rotating portion 34. The second support portion 36 is urged toward a predetermined position relative to the first support portion 35 by the elastic member provided on the rotating portion 34. Therefore, when the second support portion 36 overcomes the urging force of the elastic member and rotates around the rotating portion 34, the second support portion 36 returns to the initial position by the elastic member.

[0052] In addition, the second support portion 36 and the third support portion 37 are formed in a substantially flat plate shape similarly to the first support portion 35. In addition, the second support portion 36 and the third support portion 37 are connected via the telescopic connection portion 33. A telescopic opening portion 36a is formed at the end of the second support portion 36 on the side opposite to the rotating portion 34. In addition, a telescopic opening portion 37a is formed at a portion of the third support portion 37 that overlaps with the end of the second support portion 36 provided with the telescopic opening portion 36a.

[0053] The telescopic connecting portion 33 is inserted into the telescopic opening portion 36a of the second support portion 36 and the telescopic opening portion 37a of the third support portion 37. And the telescopic connecting portion 33 slides in the telescopic opening portions 36a and 37a. Thus, the third support portion 37 is telescopically connected to the second support portion 36. In addition, an elastic component (not shown) that applies force to the third support portion 37 to a predetermined position is provided in the telescopic connecting portion 33. Thus, after the third support portion 37 is telescoped, the third support portion 37 returns to the initial position through the elastic component. In addition, the telescopic mechanism for making the third support portion 37 telescopic relative to the second support portion 36 is not limited to the above-mentioned structure, and various other structures can be applied.

[0054] The support rod 32 is fixed to the end of the third support portion 37 on the opposite side to the second support portion 36 via the fixing portion 41. The support rod 32 is configured to be substantially cylindrical. Furthermore, the support rod 32 protrudes substantially vertically from the end of the third support portion 37. In addition, the axial direction of the support rod 32 is orthogonal to the direction in which the main sling 130 extends. That is, as shown in FIG. Figure 4 As shown, the support rod 32 is arranged such that its axial direction is parallel to the direction in which the plurality of main slings 130 are arranged.

[0055] like Figure 3 as well as Figure 4 As shown, a plurality of connection jigs 13 of the inspection units 2 described later are mounted on the support rod 32. In addition, the plurality of connection jigs 13 are supported to be movable along the axial direction of the support rod 32. Furthermore, by using a cylindrical member as the support rod 32, the connection jigs 13 are supported to be rotatable around the support rod 32.

[0056] In addition, if Figure 4 As shown, an elastic member 38 is interposed between the connecting jigs 13 and 13 of two adjacent inspection units 2. As the elastic member 38, various elastic members such as a coil spring and rubber are applicable.

[0057] [Inspection unit]

[0058] Next, the structure of the inspection unit 2 will be described.

[0059] like Figure 5 As shown, the inspection unit 2 includes a flaw detector 3 for inspecting damage of a wire rope, i.e., a main sling 130, a connecting jig 13, a connecting rod 17, and a rotation support 20. The flaw detector 3 includes a magnetizing portion for magnetizing the main sling 130 in the longitudinal direction, and a magnetic sensor. The flaw detector 3 detects leakage magnetic flux from the damaged portion of the main sling 130 through the magnetic sensor, thereby inspecting the damage state of the wire rod of the main sling 130.

[0060] A rotation support portion 20 is provided at the end portion of the flaw detection portion 3 on the opposite side of the surface facing the main sling 130. One end portion of the connecting rod 17 is connected to the rotation support portion 20 via a joint 21. In addition, the joint 21 is rotatably supported by the rotation support portion 20. Therefore, the flaw detection portion 3 is rotatably supported by one end portion of the connecting rod 17.

[0061] The connecting rod 17 is extended from the rotation support part 20 along the extension direction of the main rope 130. The other end of the connecting rod 17 on the opposite side of the rotation support part 20 is inserted into the connecting clamp 13. In addition, a stopper 22 is provided at the other end of the connecting rod 17. Thereby, the connecting clamp 13 can be prevented from falling off from the connecting rod 17.

[0062] The connection jig 13 has a screw hole 18 connected to an insertion hole into which the connection rod 17 is inserted. The fixing screw 11 is screwed into the screw hole 18. Thus, the connection rod 17 inserted into the connection jig 13 can be fixed at an arbitrary position.

[0063] In addition, a cutout portion 19 is formed in the connecting jig 13. The cutout portion 19 is open on a surface opposite to a surface of the connecting jig 13 where the screw hole 18 is formed. And, the support rod 32 of the support unit 30 is inserted into the cutout portion 19.

[0064] Furthermore, the locking member 12 is attached to the connecting jig 13. The locking member 12 is attached to the connecting jig 13 so as to be able to close and open the opening of the cutout portion 19. Thus, the connecting jig 13 can be easily attached to and detached from the support rod 32.

[0065] In addition, a biasing member 14 is provided on the locking member 12. The biasing member 14 is an elastic body composed of, for example, a coil spring. And, the biasing member 14 biases the locking member 12 in the direction of closing the open opening of the cutout portion 19. Furthermore, a bracket 15 having an insertion hole into which the locking member 12 can be inserted is fixed to the side surface of the connecting clamp 13. And, the biasing member 14 is interposed between the spring seat 16 provided on the locking member 12 and the piece of the bracket 15 having the insertion hole formed therein.

[0066] In this example, the partially open cutout 19 is used as a structure for inserting the support rod 32 in the connecting jig 13, but the present invention is not limited thereto. For example, a support hole for inserting the support rod 32 may be formed in the connecting jig 13.

[0067] 3. Working example of wire rope flaw detection device

[0068] Next, an operation example of the wire rope flaw detection device 10 having the above-mentioned structure will be described.

[0069] First, the operator fixes the mounting bracket 31 of the support unit 30 to, for example, the car side guide rail 240 that slidably supports the car 120. Next, the connecting jig 13 is mounted on the support rod 32 of the support unit 30, and a plurality of inspection units 2 are installed on the support unit 30. At this time, the inspection unit 2 is installed so that the flaw detection portion 3 of the inspection unit 2 faces the main rope 130. In addition, the number of the inspection units 2 to be installed is set according to the number of main ropes 130 of the elevator 1, 1B to be inspected. Furthermore, an elastic member 38 is interposed between the plurality of connecting jigs 13.

[0070] When the support unit 30 and the inspection unit 2 are installed, the hoist 100 is driven to move the main rope 130 in the direction in which it extends. Then, the main rope 130 is magnetized by the magnetizing portion of the flaw detector 3, and the leakage magnetic flux from the damaged portion of the main rope 130 is detected by the magnetic sensor, thereby inspecting the damaged state of the wire of the main rope 130.

[0071] In addition, the main sling 130 moves in a direction approaching and moving away from the flaw detection unit 3 of the inspection unit 2. Here, the flaw detection unit 3 is rotatably supported by the connecting rod 17 through the rotation support part 20, and the connecting fixture 13 is rotatably supported by the support rod 32 of the support unit 30. Thus, the flaw detection unit 3 can be tracked according to the movement of the main sling 130, and the flaw detection unit 3 can be reliably opposed to the main sling 130.

[0072] Figure 6 This is a plan view of the car-side pulley 121, the counterweight-side pulley 141, the main rope 130, and the wire rope flaw detection device 10 as seen from above.

[0073] like Figure 6 As shown in FIG. 1 , when the main rope 130 moves, the directions of the car side pulley 121 and the counterweight side pulley 141 also shift. Therefore, the main rope 130 not only shifts slightly in the direction approaching and moving away from the flaw detection unit 3, but also shifts greatly in the horizontal direction, which is perpendicular to the direction in which the main rope 130 extends, at an angle called a free angle.

[0074] In contrast, in the support unit 30 of the wire rope flaw detection device 10 of this example, the first support portion 35 and the second support portion 36 are connected to each other so as to be rotatable in the horizontal direction by the rotating portion 34, and the second support portion 36 and the third support portion 37 are connected to each other so as to be telescopically connected in the horizontal direction by the telescopic connecting portion 33. Thus, the rotating portion 34 and the telescopic connecting portion 33 are movable relative to the horizontal displacement of the main sling 130, so that the inspection unit 2 can track the main sling 130 as a whole.

[0075] In addition, elastic members (not shown) are provided on the rotating part 34 and the telescopic connection part 33. Therefore, the relative position between the support rod 32 of the support unit 30 and the main sling 130 can be kept constant according to the position of the main sling 130. As a result, the plurality of inspection units 2 mounted on the support rod 32 can track the main sling 130 as a whole, and stable inspection can be performed.

[0076] Figure 7 A and Figure 7 B is a diagram showing the positional relationship between the car-side pulley 121, the counterweight-side pulley 141, and the hoisting machine 100 when the main rope 130 is moved.

[0077] like Figure 7 A and Figure 7 As shown in B, when the hoisting machine 100 is driven to move the main rope 130, the intervals between the car side pulley 121 and the counterweight side pulley 141 and the hoisting machine 100 are displaced. Figure 7 As shown in FIG. 2B , when the car side pulley 121 and the counterweight side pulley 141 approach the hoisting machine 100, they are greatly displaced due to the free angle, and the directions and intervals of the plurality of main ropes 130 are also displaced. Here, even when the directions of the main ropes 130 are displaced, as described above, the rotating part 34 and the telescopic connecting part 33 are movable, so that the inspection unit 2 as a whole can track the main ropes 130.

[0078] In addition, the plurality of connecting clamps 13 are supported to be movable along the axial direction of the support rod 32, and an elastic member 38 is interposed between adjacent connecting clamps 13. In addition, the support rod 32 is arranged so that its axial direction is parallel to the direction in which the plurality of main slings 130 are arranged. Figure 7 A and Figure 7 As shown in FIG. 1B , when the intervals of the plurality of main slings 130 are displaced, the plurality of connecting jigs 13 move along the axial direction of the support rod 32. Thus, the plurality of inspection units 2 can be independently moved according to the movement of the plurality of main slings 130, and the flaw detection unit 3 can be reliably opposed to the main slings 130. Furthermore, the relative position of the inspection unit 2 and the main sling 130 can be kept constant by the elastic member 38 interposed between the connecting jigs 13.

[0079] In addition, Figure 6 to Figure 7 In the example shown in B, as an elevator, Figure 2 The 2:1 rope elevator 1B shown is described, but is not limited to this. Figure 1 In the 1:1 rope elevator 1 shown in FIG. 1 , the main rope 130 moves, so that the interval between the hoist 100 and the elevator car 120 or the counterweight 140 also shifts. Therefore, not only the main rope 130 shifts in the horizontal direction, but also the intervals between the plurality of main ropes 130 shift. Therefore, the wire rope flaw detection device 10 of this example is Figure 1 The inspection of the main rope 130 of the 1:1 rope elevator 1 shown is also effective.

[0080] In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made within the scope of the gist of the invention described in the claims.

[0081] In the above-mentioned embodiment, a flaw detector using a magnetic flux leakage method composed of a magnetizing unit and a magnetic sensor is used as the flaw detector 3, but the present invention is not limited thereto. A flaw detector using an optical sensor or other various flaw detectors may be used as the flaw detector.

[0082] In addition, in this specification, terms such as "parallel" and "orthogonal" are used, but they do not refer to only strict "parallel" and "orthogonal", but may also refer to "approximately parallel" or "approximately orthogonal" states that include "parallel" and "orthogonal" and are within the range that can exert their functions.

Claims

1. An elevator wire rope flaw detection device for inspecting elevator wire ropes, characterized in that: have: an inspection unit having a flaw detection portion for inspecting the steel wire rope for damage; and a supporting unit that supports the inspection unit, The support unit comprises: A mounting bracket, which is arranged in a hoistway in which the elevator is arranged; a first support portion, which is disposed on the mounting bracket; a second support portion rotatably connected to the first support portion via a rotating portion; a third support portion telescopically connected to the second support portion via a telescopic connection portion; and A support rod is installed on the third support portion and supports the inspection unit.

2. The wire rope flaw detection device for an elevator according to claim 1, characterized in that: The rotating part is provided with an elastic member that urges the second supporting part toward a predetermined position relative to the first supporting part. The telescopic connection portion is provided with an elastic member that urges the third support portion toward a predetermined position relative to the second support portion.

3. The elevator wire rope flaw detection device according to claim 1, characterized in that: The inspection unit is supported by the support rod so as to be movable along an axial direction of the support rod.

4. The wire rope flaw detection device for an elevator according to claim 3, characterized in that: The inspection unit is provided in plurality according to the number of the steel ropes of the elevator. The axial direction of the support rod is arranged parallel to the direction in which the plurality of steel wire ropes are arranged. A plurality of the inspection units are supported on the support rod.

5. The wire rope flaw detection device for an elevator according to claim 4, characterized in that: The inspection unit has a connecting fixture mounted on the support rod, An elastic member is interposed between the connecting jigs of two adjacent inspection units among the plurality of inspection units.

6. The wire rope flaw detection device for an elevator according to claim 5, characterized in that: The support rod is formed into a cylindrical shape. The connecting clamp is supported by the support rod so as to be rotatable around the support rod.

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