KR20170065656A - Rope break detecting device - Google Patents

Rope break detecting device Download PDF

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Publication number
KR20170065656A
KR20170065656A KR1020177012545A KR20177012545A KR20170065656A KR 20170065656 A KR20170065656 A KR 20170065656A KR 1020177012545 A KR1020177012545 A KR 1020177012545A KR 20177012545 A KR20177012545 A KR 20177012545A KR 20170065656 A KR20170065656 A KR 20170065656A
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KR
South Korea
Prior art keywords
rope
operating member
movable member
axis
cam
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KR1020177012545A
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Korean (ko)
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KR101911192B1 (en
Inventor
야스오 와타나베
아츠시 후나다
다케야 오카와
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미쓰비시덴키 가부시키가이샤
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1215—Checking means specially adapted for ropes or cables

Abstract

In the present invention, it is possible to detect the occurrence of strand breakage in the bidirectional running of the rope (7), and to detect the occurrence of strand breakage with a uniform detection sensitivity for a plurality of ropes (7) The detection device 10 is obtained. A rope breaking detection apparatus (10) of the present invention comprises a first movable member (12) rotatable about a first axis (14) and having a first cam (13) formed at a rear end thereof, (15) fixed to the front end of the first movable member (12) in parallel with the axial direction of the first shaft (14), the first operating member (15) And a main detecting portion which is arranged such that the axial direction of the first shaft is aligned with the rope arranging direction of the rope string and the first operating member 15 traverses one side of the rope string in the rope arranging direction.

Description

[0001] ROPE BREAK DETECTING DEVICE [0002]

The present invention relates to a rope breaking detection apparatus for detecting breakage of a rope for hoisting an elevator, that is, breaking of a strand of a rope.

Fig. 8 is a side view showing a schematic structure of a conventional elevator, Fig. 9 is a perspective view showing a hoisting machine installed in a machine room in a conventional elevator, and Fig. 10 is a side view explaining a rupture state of a hoisting hoop in a conventional elevator .

8 and 9, the machine room 2 is installed on the upper part of the hoistway 1 and the elevator control panel 3 and the hoisting machine 4 are installed in the machine room 2, Respectively. The hoisting rope 7 is wrapped around a sheave 5 of the hoisting machine 4 and one end of the rope 7 hangs down in the hoistway 1, And the other end thereof is received in the hoistway 1 via a deflecting sheave 6. The elevator car 8 is connected to one end of the rope 7 and the balance weight 9 is connected to the other end of the rope 7.

In the conventional elevator thus constituted, the sheave 5 is rotationally driven by the hoisting machine 4 and the elevator car 8 and the counterbalance 9 are guided by guide rails (not shown) . At this time, since the rope 7 is hooked to the sheave groove of the sheave 5, the rotation and the stopping motion of the sheave 5 are caused by the frictional force generated between the rope 7 and the sheave groove, 7, and the elevator car 8 and the balance weight 9 are raised and lowered.

The rope 7 is formed by twisting a plurality of strands 7a which are twisted wires of a wire. Therefore, as shown in Fig. 10, the rope 7 wears on a long-term basis due to a frictional force generated between the rope 7 and the sheave groove, eventually leading to the fracture of the strand 7a. When the elevator car 8 is elevated and operated with the strand 7a broken, the strand 7a of the rope 7 is broken and the other equipment is damaged, There was a possibility that the passenger would be trapped by the emergency stop.

In the conventional elevator, the management of the rope 7 and the maintenance of the safety relied only on the regular inspection by the maintenance worker. By regular maintenance by the maintenance worker, it is possible to prevent the strands 7a of the rope 7 from being broken due to aging wear. However, if the breakage of the strand 7a occurs suddenly during the period until the next regular inspection, this can not be detected, and the breakage of the strand 7a of the rope 7 progresses, And the passenger is trapped by the emergency stop of the elevator car 8. As a result, As described above, the conventional elevator does not have a function of automatically detecting the breakage of the strand 7a of the rope 7.

In consideration of this situation, the operating member is disposed close to the hoist and the operating member is configured to be moved from the initial position by the exciting strands from the outer circumferential surface of the rope at the time of occurrence of the strand break of the rope, There has been proposed a conventional rope breakage detecting apparatus for detecting the occurrence of breakage of strands (for example, see Patent Documents 1 and 2).

Patent Document 1: JP-A-2002-003119 Patent Document 2: JP-A-08-333066

The conventional rope rupture detecting apparatus according to Patent Document 1 is configured such that the operating member is moved from the initial position by the excited strands from the outer circumferential surface of the rope only when the rope is running in one direction of the rope, The occurrence of breakage can not be detected. Therefore, it is not possible to reliably prevent the breakdown of other devices caused by the occurrence of breakage of the strands, or the failure of the passenger to be trapped by the emergency stop of the car.

In the conventional rope breakage detecting apparatus according to Patent Document 2, the operation member is arranged so that one side of a rope string in which a plurality of ropes are arranged in one row is traversed in the arrangement direction of the ropes, and one end of the operation member And the rope can be rotated around an axis orthogonal to both directions of the arrangement direction of the rope, it is possible to detect occurrence of breakage of the strand at the time of running the rope in both directions. However, since the distance from the rotation center of the operating member to the rope differs from one rope to another, the operating force for moving the operating member from the initial position by the exciting strands from the outer circumferential surface of the rope varies for each rope. This has the problem that the detection sensitivity of occurrence of breakage of the strands differs from one rope to another and the occurrence of breakage of the strands can not be detected with a uniform detection sensitivity for a plurality of ropes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a rope detecting apparatus capable of detecting the occurrence of breakage of a strand at the time of running the rope in both directions, The rope breakage detecting apparatus according to claim 1,

A rope breakage detecting apparatus according to the present invention is a rope breakage detecting apparatus for detecting breakage of a plurality of ropes connected to an elevator car of an elevator at one end and is configured to be rotatable around a first axis, 1 movable member and a first operating member which is fixed to the front end of the first movable member in parallel with the axial direction of the first shaft, and the plurality of ropes are arranged on one row of rope columns Wherein the first operating member is disposed so that the axial direction of the first shaft is aligned with the rope arranging direction of the rope string and the first operating member is disposed so as to traverse one side of the rope string in the rope arranging direction, And a switch case having an actuator whose root is rotatably mounted around the pivot shaft and which has a roller mounted on the tip thereof, And a limit switch disposed so that the axis of the pivot shaft and the axis of the first axis are parallel to each other and are located on the same plane orthogonal to the rope. Wherein the main detecting unit is configured such that a strand lifted from the outer circumferential surface of the rope at the time of occurrence of the breakage of the rope presses the first operating member such that the first movable member rotates about the first axis So as to detect the occurrence of breakage of the rope. The limit switch rotates about the first axis of the first movable member and the roller is guided and moved by the first cam so that the actuator rotates about the pivot axis, And outputs a detection signal of occurrence of breakage.

According to the present invention, the first operating member is fixed to the front end of the first movable member with its longitudinal direction parallel to the axial direction of the first shaft, the axial direction of the first shaft coincides with the rope arrangement direction of the rope string, And the operating member is arranged so that one side of the rope train traverses the rope arranging direction.

Therefore, when the strand which is excited from the outer circumferential surface of the rope passes through the first operating member without depending on the running direction of the rope, the first operating member is pressed. Thereby, the first movable member is rotated about the first axis, and occurrence of breakage of the strand can be detected.

Further, the distance between the first operating member and the rope is the same in each rope, and the axial center of the first shaft and the longitudinal direction of the first operating member are parallel. Here, the operating force for rotating the first operating member about the first axis by the exciting strands from the outer circumferential surface of the rope becomes the same in each of the ropes. This makes it possible to detect the occurrence of breakage of the strands with a uniform detection sensitivity (sensitivity) for a plurality of ropes.

1 is a side view showing a rope breakage detecting apparatus according to Embodiment 1 of the present invention.
2 is a top view showing a rope breakage detecting apparatus according to Embodiment 1 of the present invention.
3 is a sectional view taken along line III-III in Fig.
4 is a cross-sectional view showing a rope breakage detecting apparatus according to Embodiment 2 of the present invention.
Fig. 5 is a side view of a main portion for explaining a method of installing a rope breakage detecting apparatus according to Embodiment 3 of the present invention. Fig.
Fig. 6 is a top view of the main portion for explaining the installation method of the rope breaking detection device according to the third embodiment of the present invention. Fig.
Fig. 7 is a top view of the recessed portion of the rope breaking detection device according to the third embodiment of the present invention, which is viewed from the vertical upper portion around the first operating member. Fig.
8 is a side view showing a schematic structure of a conventional elevator.
9 is a perspective view showing a traction machine installed in a machine room in a conventional elevator.
10 is a side view for explaining a rupture state of a rope for hoisting an elevator in a conventional elevator.

Embodiment 1

Fig. 1 is a side view showing a rope breakage detecting apparatus according to Embodiment 1 of the present invention. Fig. 2 is a top view showing a rope breakage detecting apparatus according to Embodiment 1 of the present invention. Fig.

1 to 3, the rope breaking detection apparatus 10 is mounted on one surface of a first housing 11 having a rectangular flat plate-like shape so as to be rotatable about a first axis 14, And a first movable member 12 which is formed in a cylindrical shape and which is opposed to the first cam 13 with the first shaft 14 interposed therebetween, A first actuating member 15 fixed in parallel with the axial direction of the first shaft 14 and a second actuating member 14 mounted on the first movable member 12 around the first axis 14, That is, a limit switch 16 for detecting the occurrence of breakage of the strand 7a. In addition, the first movable member 12 and the first operating member 15 constitute a main detecting portion.

The limit switch 16 includes a switch case 17 in which a built-in switch (not shown) is housed, and an actuator 18 that projects from the switch case 17 and transmits external force or movement to the built- . The actuator 18 is mounted on the switch case 17 so that the roller 18a is provided at the protruding end and the base side is rotatable around the pivot 18b parallel to the axis of the roller 18a.

The limit switch 16 allows the roller 18a to be caught by the first cam 13 and to move the shaft 18 of the first shaft 14, the shaft center of the first operating member 15, the shaft center of the roller 18a, And the switch case 17 is fixedly attached to one surface of the first housing 11 so that the axis of the pivot 18b is located on the same plane. At this time, the first operating member 15 is located outside the side of the first housing 11. [

The first housing 11 on which the first movable member 12 and the limit switch 16 are mounted is provided on one side of the rope row in which three ropes 7 are arranged in one row in the vicinity of the sheave 5, The lower end of the first operating member 15 is fixed to the machine table 30 so that the axial direction of the first operating member 15 is parallel to the arrangement direction of the rope strings. The axial center of the first shaft 14, the axial center of the first operating member 15, the axial center of the roller 18a and the axial center of the rotary shaft 18b are coplanar with the same plane perpendicular to the longitudinal direction of the rope 7 Lt; / RTI > Here, the breaking end portion of the strand 7a normally floats about 10 cm from the outer circumferential surface of the rope 7. The first operating member 15 is disposed so as to confront the rope rows so as to secure a gap d1 of about 2 cm to 3 cm, for example, so that the strands 7a are securely caught and not malfunctioned. The first operating member 15 has a length exceeding the width of the arrangement direction of the rope strings, and is disposed so as to protrude from both sides in the arrangement direction of the rope strings.

The first cover 19 is mounted on the upper end of the first housing 11 so as to cover the first movable member 12 and the limit switch 16. In addition, the first foreign matter removing shoe 20 is made of, for example, a polyethylene resin in the shape of a rectangular flat plate and mounted on the lower end of the first cover 19 and the first housing 11 , And a gap (d2) are secured so as to face the row of ropes. Here, the gap d2 is equal to or smaller than the gap d1.

The rope breaking detection apparatus 10 further includes a second movable member 22 mounted on one surface of a second housing 21 in the form of a rectangular flat plate so as to be rotatable around the second shaft 23, A second operating member 24 fixed to one end of the second movable member 22 in parallel with the axial direction of the second shaft 23 and a second cam 26 formed on one end face of the second operating member 24 And a pair of torque transmitting members 25 which are fixed to both end portions of the second operating member 24 so as to protrude in the direction opposite to the second movable member 22 in parallel with the longitudinal direction of the second movable member 22 Respectively. The second movable member 22, the second operating member 24, and the torque transmitting member 25 constitute the auxiliary detecting portion.

The second housing 21 on which the second movable member 22 is mounted is constructed such that the second operating member 24 is disposed on the other side of the rope row in which three ropes 7 are arranged in one row in the vicinity of the sheave 5, The lower end of the second operating member 24 is fixed to the machine table 30 such that the axial direction of the second operating member 24 is parallel to the arrangement direction of the rope strings. Here, the axis of the second shaft 23 and the axis of the second operating member 24 are the same as the axis of the first shaft 14, the axis of the first operating member 15, and the axis of the roller 18a And is located on a plane. The second operating member 24 is disposed so as to oppose the rope string to secure the gap d1. The pair of torque transmitting members 25 are passed through both sides in the arrangement direction of the rope strings and protrude to one side of the rope string and the second cam 26 is hooked on both end sides of the first operating member 15.

The second cover 27 is mounted on the upper end of the second housing 21 so as to cover the second movable member 22. The second foreign matter removing shoe 28 is made of, for example, a polyethylene resin or the like in the shape of a rectangular flat plate and mounted on the lower ends of the second cover 27 and the second housing 21, And arranged so as to face the row of ropes.

The first movable member 12 and the first movable member 15 are arranged such that the center of gravity of the integral body of the first movable member 12 and the first movable member 15 is located at the center of the axis of the first shaft 14 As shown in Fig. Therefore, in the normal state, the first movable member 12 does not generate a rotational force due to the unbalance in weight (weight) around the first axis 14. [ The second movable member 22 and the second movable member 24 are arranged in such a manner that the center of gravity of the integral body of the second movable member 22 and the second movable member 24 is parallel to the axial center of the second shaft 23 As shown in Fig. Therefore, in the normal state, the second movable member 22 does not generate a rotational force due to the weight unevenness around the second shaft 23. [

In the normal state of the rope breakage detecting apparatus 10 constructed as described above, the axis of the first shaft 14, the axis of the first operating member 15, the axis of the roller 18a, the axis of the rotating shaft 18b, The axis 18 of the second axis 23 and the axis of the second operating member 24 are located on the same plane perpendicular to the longitudinal direction of the rope 7 and the roller 18a is caught by the first cam 13, 2 cam 26 is engaged with the first operating member 15. Then, the actuator 18 does not press the built-in switch, and the built-in switch is turned OFF. Here, the detection signal of the rope rupture output from the limit switch 16 to the elevator control panel 3 via the rope rupture operation detecting cable (not shown) is OFF.

Here, when the strand 7a breaks in a part of the rope 7, the broken strand 7a is lifted from the outer periphery of the rope 7 as shown in Fig. The excited strand 7a from the outer periphery of the rope 7 travels along the rope 7 and travels through the rope breaking detection device 10 when the first operation member 15 and the second operation member 24).

1, when the rope 7 runs in the upward direction and the strand 7a presses the first operating member 15, the first movable member 12 rotates about the first axis 14 In the counterclockwise direction. Thus, the actuator 18 is guided and moved by the first cam 13 to rotate the roller 18a in the clockwise direction around the pivotal axis 18b on the root side. By the rotation of the actuator 18, the internal switch of the limit switch 16 is pressed and turned on. Then, when the first movable member 12 rotates beyond the set angle, the engagement between the roller 18a and the first cam 13 is released. At the same time, the engagement between the first operating member 15 and the second cam 26 is released.

1, when the rope 7 runs in the upward direction and the strand 7a presses the second operating member 24, the second movable member 22 rotates clockwise around the second axis 23 Lt; / RTI > As a result, the torque transmitting member 25 rotates clockwise about the second shaft 23. The first operating member 15 is guided and moved by the second cam 26 to rotate about the first axis 14 in the counterclockwise direction. Further, the actuator 18 is guided and moved by the first cam 13 by the roller 18a, and rotates clockwise around the pivotal axis 18b on the root side. By the rotation of the actuator 18, the internal switch of the limit switch 16 is pressed and turned on. Then, when the torque transmitting member 25 rotates beyond the set angle, the engagement between the first operating member 15 and the second cam 26 is released. When the first movable member 12 rotates beyond the set angle, the engagement between the roller 18a and the first cam 13 is released.

When the rope 7 travels downward, the direction of rotation of the first movable member 12 about the first axis 14 is opposite to that of the second axis of the second movable member 22 23 are opposite to each other, description of the detection operation will be omitted.

Then, the detection signal of the rope rupture outputted from the limit switch 16 to the elevator control panel 3 via the detection signal output cable (not shown) is turned ON. The elevator control panel 3 stops the elevator car 8 at the nearest floor and stops the restarting and informs the monitoring center of the occurrence of the break of the strand 7a . Then, the maintenance worker rushes to the scene, and the rope 7 is exchanged to return the first movable member 12, the second movable member 22, etc. to the initial position, The roller 18a is returned to the engaged state and the second cam 26 and the first operating member 15 are returned to the engaged state.

According to the first embodiment, the main detecting portion includes a first movable member 12 that is rotatable about the first axis 14 and has a first cam 13 formed at the rear end thereof, (15) having a first operating member (15) fixed to the front end of the first movable member (12) in parallel with the axial direction of the first operating member (14) 15 so that the axial direction of the first shaft 14 coincides with the rope arrangement direction of the rope strings and the first operation member 15 traverses one side of the rope strings in the rope arrangement direction. The limit switch 16 is mounted on the switch case 17 so as to be rotatable about the pivotal axis 18b at the base side thereof and has an actuator 18 having a roller 18a mounted on the tip thereof, Is placed on the first cam 13 so that the axis of the rotary shaft 18b and the axis of the first shaft 14 are parallel to each other and on the same plane orthogonal to the rope 7 .

The first strand 7a pushes the first operating member 15 when the strand 7a passes from the outer circumferential surface of the rope 7 through the first operating member 15 regardless of the running direction of the rope 7. [ Thereby, the first movable member 12 is rotated around the first axis 14, and the occurrence of the breakage of the strand 7a can be detected.

The distance between the first operating member 15 and the rope 7 is the same in each rope 7 and the axis of the first shaft 14 and the axis of the first operating member 15 are parallel have. The operating force for rotating the first operating member 15 about the first axis 14 by the excited strands 7a from the outer circumferential surface of the rope 7 is the same in each rope 7. [ This makes it possible to detect the occurrence of breakage of the strand 7a with uniform detection sensitivity for the three ropes 7. [

When the rope 7 travels in a state in which the strand 7a is wound around the first operating member 15 or the second operating member 24 from the outer periphery of the rope 7, 15 or the second operating member 24 are pulled by the strands 7a, thereby damaging the rope breakage detecting device 10. [

When the first movable member 12 is rotated about the first axis 14 beyond the predetermined angle after the detection signal of the rope rupture is outputted in this first embodiment, the roller 18a and the first cam 13 Is released. When the engagement between the roller 18a and the first cam 13 is released, the first movable member 12 pivots around the first shaft 14 due to inertia, and the first operating member 15 And deviates from the locus of the strand 7a drawn by the running of the rope 7. [ This prevents the ropes 7 from running while the strands 7a are displaced from the first operating member 15 and the strands 7a are wound on the first operating member 15. [ Therefore, the occurrence of a situation in which the first operating member 15 is pulled by the wound strand 7a and the rope breaking detection apparatus 10 is damaged by the running of the rope 7 is suppressed.

When the second movable member 22 is rotated about the second axis 23 beyond the predetermined angle after the detection signal of the rope break is outputted, the first operation member 15 and the second cam 26 Is released. When the engagement between the first operating member 15 and the second cam 26 is released, the second movable member 22 is rotated about the second axis 23 by inertia, 24 deviate from the locus of the strand 7a drawn by the running of the rope 7. This prevents the ropes 7 from running while the strands 7a are displaced from the second operating member 24 and the strands 7a are wound on the second operating member 24. [ Therefore, the occurrence of a situation in which the second operating member 24 is pulled by the wound strand 7a and the rope breaking detection apparatus 10 is damaged by the running of the rope 7 is suppressed.

The first shoe removing shoe 20 and the second shoe removing shoe 28 are disposed on both sides of the rope 7 of the first operating member 15 and the second operating member 24 in the longitudinal direction. In addition, the gap d2 is equal to or smaller than the gap d1. Therefore, since the dust adhering to the rope 7 or the solidified oil is removed by the first foreign matter removing shoe 20 and the second foreign matter removing shoe 28, It is reliably avoided that the solidifying oil presses the first operating member 15 and the second operating member 24 to turn the limit switch 16 ON.

Since the first cover 19 is mounted on the housing 11 so as to cover the limit switch 16, the solidified oil attached to the rope 7 is scattered to the limit switch 16 when the rope 7 is traveling. (Scattering) of the limit switch 16 and causing the operation of the limit switch 16 to occur is suppressed.

The main detecting portion composed of the first movable member 12 and the first operating member 15 is disposed on one side of the rope train and the second movable member 22, the second operating member 24, and the torque transmitting member 25 ) Is disposed on the other side of the rope string. Therefore, since the exciting strands 7a can be detected from the outer periphery of the rope 7 on both sides of the rope row, the detection accuracy of the occurrence of the rupture of the strands 7a can be enhanced. Since the rotation torque obtained from the auxiliary detecting portion is transmitted to the main detecting portion via the torque transmitting member 25, the limit switch 16 can be disposed only on the main detecting portion side, thereby reducing the cost of the rope breaking detecting device 10 .

In the first embodiment, the first foreign matter removing shoe 20 and the second foreign matter removing shoe 28 are disposed in the longitudinal direction of the rope 7 of the first operating member 15 and the second operating member 24, The first foreign object removing shoe 20 and the second foreign object removing shoe 28 are disposed on both sides of the rope 7 in the longitudinal direction of the rope 7 of the first operating member 15 and the second operating member 24, It may be disposed on one side.

Embodiment 2 Fig.

4 is a cross-sectional view showing a rope breakage detecting apparatus according to Embodiment 2 of the present invention.

The side of the first operating member 15A and the side opposite to the rope row of the second operating member 24A are connected to the first operating member 15A and the second operating member 24A ) At regular intervals in the lengthwise direction thereof to form an uneven surface.

The other configuration of the second embodiment is configured similarly to the first embodiment.

The breaking detection operation of the strand 7a of the rope breaking detection apparatus 10A constructed as described above is the same as that of the rope breaking detection apparatus 10 according to the first embodiment, and a description thereof will be omitted here.

Here, when the traveling speed of the rope 7 is high, the excited strands 7a from the outer periphery of the rope 7 come in contact with the cylindrical first operating member 15 and the second operating member 24 , It is possible to apply to the first operation member 15 and the second operation member 24 a turning force capable of turning ON the internal switch of the limit switch 16. [ However, when the traveling speed of the rope 7 is low, the excited strands 7a from the outer periphery of the rope 7 come in contact with the cylindrical first operating member 15 and the second operating member 24 There is a possibility that the first and second actuating members 15 and 24 can not be given a rotational force capable of turning the internal switch of the limit switch 16 ON.

Since the side opposed to the rope rows of the first operating member 15A and the second operating member 24A is an uneven surface in the second embodiment, even when the running speed of the rope 7 is low, The excited strands 7a from the outer periphery of the strands 7 can be surely caught in the grooves 29 and the breakage of the strands 7a can be reliably detected.

It is preferable to make the groove width of the groove 29 wider than the diameter of the strand 7a from the viewpoint that the exciting strand 7a from the outer periphery of the rope 7 is easily caught in the groove 29. [

In the first and second embodiments, the first and second operation members are formed in a cylindrical shape. However, the shape of the first and second operation members is not limited to a cylindrical shape. The shape of the first and second operation members may be a length . The outer peripheral surfaces of both end portions in the longitudinal direction of the first operating member may be curved surfaces that can be caught by the second cam.

Embodiment 3:

5 (a) and 5 (b) show a state before the position adjustment of the first operation section, and FIG. 5 (b) shows a state before the position adjustment of the first operation section. And shows the state after the position adjustment of the first operating portion. 6 (a) and 6 (b) show a state before the position adjustment of the first operation section, and Fig. 6 (b) Shows the state after the position adjustment of the first operating portion. Fig. 7 is a top view of the recessed portion of the rope breaking detection device according to the third embodiment of the present invention, which is viewed from the vertical upper portion around the first operating member. Fig. 5 is a view showing the vicinity of the first operating member of the rope breakage detecting device viewed from the side of the limit switch, and Fig. 6 is a view of the rope breaking detection device as seen from the top of the first operating member.

5 and 6, the first operating member 15B includes a first fixed portion (not shown) fixed to the other end of the first movable member 12 in parallel with the axial direction of the first shaft 14 A first operating portion 152 mounted on the first fixing portion 151 so as to be slidable in a longitudinal direction of the first fixing portion 151; (153). The first operating portion 152 is formed in an L shape. A pair of slide holes 154 are formed on both sides in the longitudinal direction of one L-shaped piece of the first operating portion 152 with the direction of the hole being the lengthwise direction. The first operating portion 152 is fixed to the first fixing portion 151 by fastening the bolt 153 to the first fixing portion 151 by passing the bolt 153 through the slide hole 154, The first fixing portion 151 can be reciprocated in the longitudinal direction of the first fixing portion 151, that is, in the direction of the hole of the slide hole 154. [ Then, the slide movement amount is half of the arrangement pitch p of the ropes 7.

The L-shaped other piece of the first operating portion 152 protrudes from the first fixing portion 151 when mounted on the first fixing portion 151. The circular detection surface 155 is provided on the surface of the rope 7 that protrudes from the first fixing portion 151 of the first operating portion 152 of the first operating portion 152 so as to be concave on the surface facing each other, 7 in the longitudinal direction at the same pitch as the arrangement pitch p. The surfaces of the ropes 7 protruding from the first fixing portions 151 of the first operating portion 152 and facing the ropes 7 are arranged in such a manner that three ropes 7 are arranged in parallel with the rope rows arranged in one row, (156). The radius of curvature r2 of the detection surface 155 is (r1 + d1). Here, r1 is the radius of the rope 7.

The rope breakage detecting apparatus according to the third embodiment uses the first operating member 15B in place of the first operating member 15 and the second operating member 15B in the second housing 21, 2 operation member 24, and the torque transmitting member 25 are omitted in the second embodiment.

The first housing 11 on which the first movable member 12 and the limit switch 16 are mounted can be replaced with the first housing 11 in which the three ropes 7 in the vicinity of the sheave 5 are arranged in a row, The first operating member 15B is directed to one side and the lower end of the first operating member 15 is pivoted to the machine table 30 so that the axial direction of the first operating member 15 is parallel to the arrangement direction of the rope strings. Fixed. The bolts 153 are loosened so that the first operating portions 152 are slid until the bolts 153 are brought into contact with one end of the slide holes 154 to fasten the bolts 153, (152) in the first position.

Next, as shown in Figs. 5 (a) and 6 (a), the guide surface 156 between the detection surfaces 155 of the first operating portion 152 is brought into contact with the rope 7 , The position of the first housing (11) is adjusted, and the first housing (11) is fixed to the machine table (30). Next, the bolts 153 are loosened, and as shown in Figs. 5 (b) and 6 (b), until the bolts 153 come in contact with the other ends of the slide holes 154, The bolt 153 is fastened, and the first operating portion 152 is positioned at the second position. At this time, the slide movement amount of the first operation portion 152 becomes p / 2. 7, the detection surface 155 is disposed such that the center of curvature of the arc surface coincides with the axis O of the rope 7, and the detection surface 155 and the rope 7 ) Is d1. The center angle? Of the arc surface is the detection range of the strand 7a.

According to the third embodiment, the first operating member 15B includes a first fixing portion 151 (not shown) fixed to the front end of the first movable member 12 with its longitudinal direction being parallel to the axial direction of the first shaft 14 And a second position displaced from the first position and the first position by one half of the arrangement pitch (p) of the ropes (7) on one side in the longitudinal direction of the first fixing portion (151) And a first operating portion 152 mounted on the first fixing portion 151. Only when the surface of the rope 7 protruding from the first fixing portion 151 of the first operating portion 152 and facing the rope row is located at the first position, the guide surface 156 And a detection surface 155 which is separated from the rope 7 by a distance d1 only when it is located at the second position.

After the first operating portion 152 is moved to the first position with the first housing 11 fixed to the machine table 30 and the guide surface 156 is brought into contact with the rope 7, 1 Adjust the position of the housing (11) and fix it on the machine table (30). Then, by positioning the first operating portion 152 in the second position, the distance between the detecting surface 155 and the rope 7 is adjusted to d1. Therefore, it is unnecessary to perform complicated operation of adjusting the position of the first housing 11 while measuring the distance between the detection surface 155 and the rope 7, so that the rope breaking detection device can be easily fixed .

Since the detection surface 155 is an arc surface, the detection range is increased as compared with the case where the detection surface is a flat surface. Thus, since the detection accuracy of the strand 7a is increased, the reliability of detection of rope rupture is improved.

The detection range of the strand 7a can be set appropriately by changing the central angle? Of the detection plane 155. For example, when the central angle? Of the detection plane 155 is 180 degrees, The detection range of the light source 7a is 180 degrees.

In the third embodiment, the detecting surface of the first operating portion is an arc surface. However, the detecting surface may be a flat surface composed of the bottom surface of the recess formed by recessing the guide surface by the depth d1.

In the third embodiment, only the main detection unit is provided, but an auxiliary detection unit may be provided. In this case, the second actuating part of the auxiliary detecting part may be configured similarly to the first actuating part of the main detecting part.

In the above-described embodiments, three ropes are arranged in one row. However, the number of ropes is not limited to three, and two ropes or four ropes or more may be used.

Claims (8)

There is provided a rope break detection apparatus for detecting a break of a plurality of ropes connected at one end to an elevator car of an elevator,
A first movable member which is rotatable around a first axis and which has a first cam formed at a rear end thereof and a second movable member which is fixed to the tip of the first movable member in a longitudinal direction parallel to the axial direction of the first movable member, Wherein the first operating member is directed to a row of ropes in which the plurality of ropes are arranged in one row and the axial direction of the first shaft is aligned with the rope arrangement direction of the rope string, A main detecting part arranged so as to traverse one side of the rope string in a rope arranging direction,
The switch case being rotatably mounted on a rotary shaft around a root of the switch case and having an actuator having a roller mounted on a front end thereof so that the roller is engaged with the first cam, And a limit switch disposed so that the axial centers of one axis are parallel to each other and are located on the same plane orthogonal to the rope,
Wherein the main detecting unit is configured such that a strand lifted from the outer circumferential surface of the rope at the time of occurrence of the breakage of the rope presses the first operating member such that the first movable member rotates about the first axis To detect the occurrence of breakage of the rope,
The limit switch rotates about the first axis of the first movable member and the roller is guided and moved by the first cam so that the actuator rotates about the pivot axis, And outputs a detection signal of occurrence of breakage. The method according to claim 1,
And the engagement state between the roller and the first cam is released after the output of the detection signal of the occurrence of the breakage of the rope. The method according to claim 1 or 2,
And a surface (surface) facing the rope row of the first operating member is an uneven surface. The method according to claim 1 or 2,
Wherein the first operating member comprises: a first fixing part fixed to a front end of the first movable member in a longitudinal direction parallel to the axial direction of the first shaft; and a second fixing part fixed from the first position and the first position, And a second position displaced by one half of an arrangement pitch of the ropes on one side in the longitudinal direction of the rope, wherein the first operating portion is mounted on the first fixing portion so as to reciprocate between the first position and the second position,
A guide surface projecting from the first fixing portion of the first operation portion toward the rope heat side and contacting the rope row only at a position facing the rope row at the first position, And a detecting surface which is spaced apart from the rope by a predetermined distance. The method of claim 4,
Wherein the detection surface is formed on an arc surface around the axis of the rope when the detection surface is located at the second position. The method according to any one of claims 1 to 5,
A second gap between the first operating member and the rope string is equal to or smaller than a first gap between the first operating member and the rope string and between the first gap and the rope string, And a foreign matter removing shoe disposed at least on one side of the rope breaking detection device. The method according to any one of claims 1 to 6,
And a cover covering the limit switch. The method according to any one of claims 1 to 7,
A second movable member having a longitudinal direction parallel to the axial direction of the second shaft and fixed to a front end of the second movable member, and a second cam formed at a front end thereof, And an auxiliary detecting portion having a torque transmitting member having a rear end fixed to an end of the second operating member,
Wherein the auxiliary detecting portion is configured to cause the second operating member to face the first operating member with the rope therebetween and to engage the second cam with the first operating member, And the axial centers of the first axis are parallel to each other and are located on the same plane.
KR1020177012545A 2014-10-16 2015-06-03 Rope break detecting device KR101911192B1 (en)

Applications Claiming Priority (3)

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JPPCT/JP2014/077518 2014-10-16
PCT/JP2014/077518 WO2016059695A1 (en) 2014-10-16 2014-10-16 Rope break detection device
PCT/JP2015/066003 WO2016059825A1 (en) 2014-10-16 2015-06-03 Rope break detecting device

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CN109534171A (en) * 2018-12-11 2019-03-29 株洲天桥起重机股份有限公司 A kind of four rope grab crane rope rope break detection device
CN109626178A (en) * 2019-01-31 2019-04-16 北京福得伟业电梯维护有限公司 A kind of maintenance test device and maintenance test method for elevator dragging wire rope
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WO2016059695A1 (en) 2016-04-21
JPWO2016059825A1 (en) 2017-04-27
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CN106794963A (en) 2017-05-31
JP6192852B2 (en) 2017-09-06
KR101911192B1 (en) 2018-10-23

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