WO2017002192A1

WO2017002192A1 - Detection device for elevator, which detects amount of wear of rope groove

Info

Publication number: WO2017002192A1
Application number: PCT/JP2015/068791
Authority: WO
Inventors: 昌孝近藤
Original assignee: 三菱電機株式会社
Priority date: 2015-06-30
Filing date: 2015-06-30
Publication date: 2017-01-05

Abstract

The present invention provides a detection device (10) for an elevator, which detects the amount of wear of a rope groove, the detection device reducing measurement work in a narrow space between a rope sheave (7) and a deflector sheave (8) and improving the efficiency of measurement work. This detection device (10) for an elevator, which detects the amount of wear of a rope groove, is provided with: a detection rod (14) disposed so that the detection rod (14) can pivot about a rotation shaft (13) parallel to the shaft of the rope sheave (7), and so that one end side of the detection rod (14) can be inserted into a portion of the rope groove (7a) of the rope sheave (7), the portion facing the deflector sheave (8), the detection rod (14) being configured so that the amount of pivoting thereof when the one end side is pressed against the rope groove (7a) will change according to the amount of wear of the rope groove; and an abnormal wear detection section for detecting that the amount of pivoting of the detection rod (14) from the position to which the detection rod (14) pivots when the rope groove (7a) has not worn has reached an abnormal wear pivot amount.

Description

Elevator rope groove wear detection device

This invention relates to a device for detecting the amount of wear on the rope groove of an elevator hoisting machine.

In the elevator, the car and the counterweight were connected to the rope wound around the sheave of the hoisting machine and arranged in the hoistway so that it could be raised and lowered. Since the rope tension is applied to the sheave groove of the sheave, the sheave groove of the sheave is worn. Therefore, it has been necessary to periodically measure the amount of wear on the rope groove of the sheave.

In view of such a situation, the guide tube is arranged so that the first reference surface of the guide tube is in contact with the groove shoulder of the sheave groove of the sheave, the gauge rod is passed through the insertion portion of the guide tube, and one end of the gauge rod Conventionally, the amount of wear on the rope is measured with an indicator that displays the relative position between the second reference surface side end of the guide tube and the other end of the gauge rod. A method for measuring the amount of wear on the tie groove has been proposed (see, for example, Patent Document 1).

JP 2014-97869 A

The conventional method of measuring the amount of wear on the leve groove is a problem for maintenance personnel because it is a complicated measurement work in a limited space between the sheave and the deflector, so that the work load is large and the measurement workability is reduced. was there.

The present invention has been made to solve the above-described problems, and reduces the amount of measurement work in a narrow space between the sheave and the deflecting wheel and can improve the measurement workability. The object is to obtain a device.

The apparatus for detecting the amount of wear in the sheaves of an elevator according to the present invention is rotatable about a rotation axis parallel to the shaft of the sheave, and can be inserted at one end into a portion of the sheave groove of the sheave facing the sled wheel. A detecting rod that is disposed and the amount of rotation when the one end side is pressed against the rope groove changes according to the amount of wear on the rope groove, and the rotation of the detection rod when the rope groove is not worn A wear abnormality detection unit that detects that the rotation amount of the detection rod from the position has reached the wear abnormality rotation amount;

According to the present invention, by pressing one end side of the detection rod against the rope groove, the wear abnormality detection unit wears the rotation amount of the detection rod from the rotation position of the detection rod when the rope groove is not worn. It is detected that the abnormal amount of rotation has been reached. This eliminates the need for a maintenance worker to operate the guide tube and gauge bar to measure the amount of wear on the rope groove in the limited space between the sheave and the deflector. The load of measuring the amount of wear on the rope is reduced and the workability of the measurement is improved.

It is the schematic explaining the structure of the elevator which concerns on Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an elevator rope groove wear amount detecting apparatus according to Embodiment 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the structure of the leash groove wear amount detection apparatus of the elevator which concerns on Embodiment 1 of this invention. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. It is a figure explaining the relationship between the detection rod and the rope groove in the rope rope wear amount detection apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a figure explaining the structure of the leash groove wear amount detection apparatus of the elevator which concerns on Embodiment 2 of this invention. It is a figure explaining the structure of the leash groove wear amount detection apparatus of the elevator which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram for explaining the configuration of an elevator according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing an elevator rope groove wear amount detecting device according to Embodiment 1 of the present invention, and FIG. FIG. 4 is a diagram for explaining a configuration of an elevator rope crevice wear amount detecting device according to Embodiment 1 of the invention, FIG. 4 is a sectional view taken along arrows IV-IV in FIG. FIG. 5A is a view for explaining the relationship between the detection rod and the rope groove in the rope groove wear amount detection device of FIG. 5, (a) of FIG. 5 shows the position of the detection rod in contact with the unworn rope groove, Indicates the position of the detection rod in contact with the worn rope. In FIG. 1, for convenience, the hoisting machine shows only a sheave.

In FIG. 1, a car 1 and a counterweight 2 are guided by a guide rail (not shown) and are disposed in a hoistway 3 so as to be lifted and lowered. A machine room 4 is formed above the hoistway 3 with a floor 5 therebetween. In the machine room 4, a control panel 6 as a control device that controls the raising and lowering of the car 1, a hoisting machine that raises and lowers the car 1, and the like are installed. Then, the car 1 and the counterweight 2 are connected to both ends of the rope 9 that is wound around the hoisting wheel 7 and the deflecting wheel 8 of the hoisting machine and is suspended in the hoistway 3. 7 is moved up and down by driving.

As shown in FIG. 2, the rope groove wear amount detection device 10 includes a gantry 11 and a detection rod 14 having a circular cross section that is rotatably attached to a support arm 12 erected on the gantry 11 around a rotation shaft 13. And is installed on the gantry 11 so as to be positioned in the rotation plane of the detection rod 14 orthogonal to the rotation shaft 13 and is pressed against the other end side (operation part) of the rotation detection rod 14 to detect wear abnormality. A limit switch 15 as a wear abnormality detection unit, and a spring member 16 as a first elastic member that urges the detection rod 14 so that the operation unit of the detection rod 14 presses the limit switch 15.

As shown in FIGS. 1 and 3, the rope groove wear amount detection device 10 has a rotary shaft 13 parallel to the axis of the sheave 7, and one end side (contact portion) of the detection rod 14 is the rope of the sheave 7. It is positioned so that it can be inserted into a portion of the groove 7a facing the deflecting wheel 8, and the gantry 11 is attached to a stationary member such as a hoisting machine main body, and is installed in a space between the sheave 7 and the deflecting wheel 8. . Then, the biasing force of the spring member 16 acts on the detection rod 14, and the detection rod 14 rotates counterclockwise around the rotation shaft 13 in FIG. 3, and the contact portion thereof is the rope groove 7 a of the sheave 7. Inserted inside. The contact portion of the detection rod 14 is pressed against the inner wall surface of the rope groove 7a by the urging force of the spring member 16, and is held in that state. In this state, the operating portion of the detection rod 14 is separated from the limit switch 15, and the limit switch 15 is in the open state.

Then, the rotation position of the detection rod 14 pressed against the inner wall surface of the rope groove 7a is displaced according to the wear amount of the rope groove 7a. That is, the contact portion of the detection rod 14 that contacts the rope groove 7a is moved from the reference position that contacts the unworn rope groove 7a shown in FIG. 5A to the worn rope shown in FIG. 5B. It is displaced to a position in contact with the groove 7a. The displacement amount δ1 of the position of the contact portion of the detection rod 14 corresponds to the rope wear amount. The amount of rotation of the detection rod 14 from the reference position changes according to the displacement amount δ1, that is, the amount of wear on the rope. Hereinafter, δ1 is defined as the amount of wear on the rope groove.

Here, the displacement δ2 of the operating portion of the detection rod 14 for closing the limit switch 15 is expressed by δ2 = δ1 × (L2 / L1). However, L1 is the distance from the rotating shaft 13 to the contact part of the detection rod 14 in contact with the rope groove 7a, and L2 is the distance from the rotating shaft 13 to the operating part of the detection rod 14. In this way, by setting L2> L1, the displacement δ2 of the operating portion of the detection rod 14 becomes a value obtained by amplifying the rope wear amount δ1 by L2 / L1 even when the rotation amount of the detection rod 14 is the same. Therefore, the distance from the rotary shaft 13 to the limit switch 15 and the detection rod 14 and the limit switch are set so that the limit switch 15 is closed by the detection rod 14 when the wear amount δ1 reaches the abnormal wear amount. The distance between 15 is adjusted.

The number of ropes 7a of the sheave 7 is twice as many as the number of the ropes 9. As shown in FIG. 4, the ropes wear amount detecting device 10 has as many detection rods as the number of ropes 7a. 14, the limit switch 15, and the spring member 16, and each wear abnormality of the rope groove 7a can be detected.

Next, the operation of the rope wear amount detecting device 10 will be described.
Since the tension of the rope 9 is applied to the rope groove 7a of the sheave 7 when the car 1 is raised and lowered, the rope groove 7a is worn. Since the detection rod 14 is pressed against the rope groove 7a by the urging force of the spring member 16, as the rope groove 7a wears, the detection rod 14 rotates counterclockwise around the rotary shaft 13 in FIG. Move. Then, when the rotation position of the detection rod 14 changes according to the amount of wear on the rope groove δ1, and the amount of wear on the rope groove δ1 reaches the abnormal wear amount, the rotation amount of the detection rod 14 from the reference position becomes the abnormal wear rotation amount. To reach. As a result, the limit switch 15 is pressed and closed by the operating portion of the detection rod 14, and an abnormal wear of the rope groove 7a is detected. When the control panel 6 detects the closing of the limit switch 15, the control panel 6 stops the operation of the car 1 and outputs a wear abnormality signal for the rope groove 7 a to the monitoring center 20. When the monitoring center 20 receives the abnormal wear signal of the rope groove 7a, a maintenance staff is dispatched to inspect the rope wheel 7.

According to the first embodiment, the detection rod 14 is disposed so that the rotating shaft 13 is parallel to the axis of the sheave 7 and the contact portion thereof can be inserted into a portion of the sheave groove 7a facing the deflecting wheel 8. ing. Further, the limit switch 15 is disposed so that the detection rod 14 is closed when the rotation amount of the detection rod 14 from the rotation position contacting the unworn rope groove 7a reaches the abnormal wear rotation amount. Has been. Therefore, the maintenance staff does not need to perform complicated work such as measuring the wear amount of the rope groove 7a by operating the guide tube and the gauge rod in the limited space between the rope wheel 7 and the deflector wheel 8. The load of measuring the amount of wear on the rope groove of the maintenance staff is reduced, and the measurement workability is improved.

The distance L2 from the rotation shaft 13 to the operating portion of the detection rod 14 is longer than the distance L1 from the rotation shaft 13 to the contact portion of the detection rod 14 in contact with the rope groove 7a. Therefore, since the displacement δ2 of the operating portion of the detection rod 14 is a value obtained by amplifying the rope wear amount δ1 by L2 / L1 even when the rotation amount of the detection rod 14 is the same, the measurement accuracy of wear abnormality can be improved. it can.

Since the spring member 16 is disposed so as to press the contact portion of the detection rod 14 against the rope groove 7a, it is possible to constantly monitor the occurrence of abnormal wear of the rope groove 7a. Further, since the control panel 6 detects the closing of the limit switch 15 and outputs the occurrence of abnormal wear of the rope groove 7a to the monitoring center 20, it automatically detects the occurrence of wear abnormality of the rope groove 7a. In addition, it is possible to accurately grasp the replacement time of the sheave 7 and to quickly replace the sheave 7 in which the wear abnormality has occurred in the sheave groove 7a with a new sheave 7.

Since the number of detection rods 14 corresponding to the number of rope grooves 7a are arranged so as to be insertable into the target rope grooves 7a, abnormal wear in each rope groove 7a can be detected.

In the first embodiment, the limit switch 15 is used as the wear abnormality detection unit. However, as the wear abnormality detection unit, an indicator unit that displays the relative position of the operation unit of the detection rod 14 instead of the limit switch 15. May be used. The indicator portion is attached to the gantry 11 and the position of the operating portion of the detection rod 14 when the detection rod 14 is disposed so as to contact the unworn rope groove 7a of the sheave 7 is used as a reference position. The position of the operating portion of the detection rod 14 when the amount of rotation reaches the amount of abnormal wear rotation is displayed. Therefore, the maintenance staff can easily check whether the rotation amount of the detection rod 14 has reached the abnormal rotation amount of wear by checking the position of the operation portion of the detection rod 14 during periodic inspection. Judgment can be made. As a result, the maintenance staff operates the guide tube and the gauge rod within the limited space between the sheave 7 and the deflector wheel 8 to visually measure the minute wear amount of the tug groove 7a. Work is unnecessary. Further, since the displacement δ2 of the operating portion of the detecting rod 14 becomes a displacement obtained by amplifying the minute wear amount δ1 of the rope groove 7a, it is easy to measure the wear abnormality of the rope groove 7a, and the measurement accuracy is improved.

Embodiment 2. FIG.
FIG. 6 is a diagram for explaining the configuration of an elevator rope crevice wear amount detecting apparatus according to Embodiment 2 of the present invention.

In FIG. 6, the rope wear amount detection device 10 </ b> A is energized with a spring member 17 as a second elastic member that urges the detection rod 14 so that the operating portion of the detection rod 14 is separated from the limit switch 15. And an electromagnetic coil 18 that generates a driving force that presses the limit switch 15 against the urging force of the spring member 17.

This tight groove wear amount detecting device 10A uses the spring member 17 in place of the spring member 16 and is newly provided with an electromagnetic coil 18, except for the tight groove wear amount detecting device 10 according to the first embodiment. Since the configuration is the same, the same effect as in the first embodiment can be obtained.

In the sheave wear amount detection device 10A configured as described above, the detection rod 14 is normally held at a position where the contact portion is separated from the rope groove 7a by the biasing force of the spring member 17. At the time of measuring the wear amount of the leash groove 7a, the control panel 6 energizes the electromagnetic coil 18 and resists the urging force of the spring member 17 so that the detection rod 14 is centered on the rotary shaft 13 in FIG. And the contact portion of the detection rod 14 is pressed against the rope groove 7a.

According to the second embodiment, normally, the contact portion of the detection rod 14 is separated from the rope groove 7a, and the control panel 6 energizes the electromagnetic coil 18 when measuring the wear amount of the rope groove 7a. Since the contact portion of the detection rod 14 is pressed against the rope groove 7a, the wear of the rope groove 7a and the detection rod 14 due to the contact between the rope groove 7a and the detection rod 14 is reduced, and the wear amount of the rope groove 7a is measured. Accuracy is increased.
When the control panel 6 periodically energizes the electromagnetic coil 18, the amount of wear of the rope groove 7a can be measured periodically and automatically. Furthermore, the control panel 6 energizes the electromagnetic coil 18 when the sheave 7 is stopped, so that there is no wear of the leash groove 7a and the detection rod 14 due to the contact between the rope groove 7a and the detection rod 14, and the The accuracy of measuring the amount of wear is further increased.

Embodiment 3 FIG.
FIG. 7 is a diagram for explaining the configuration of an elevator rope crevice wear amount detecting apparatus according to Embodiment 3 of the present invention.

In FIG. 7, a rope wear amount detecting device 10B includes a fixed contact 22 and a power source 23, and an electric circuit 21 serving as a wear abnormality detecting unit having an operating portion of the detection rod 14 as a movable contact, and a wear abnormality notifying device. As a lamp 24.

This tight groove wear amount detecting device 10B uses the electric circuit 21 in place of the limit switch 15, and additionally includes a lamp 24, except that the control panel 6 is disconnected from the electric circuit 21. It is comprised similarly to the tie groove wear amount detection apparatus 10 by.

In the sheave wear amount detection device 10B configured as described above, the detection rod 14 is normally held at a position where the contact portion is in contact with the rope groove 7a by the urging force of the spring member 16. Then, when the rotation position of the detection rod 14 changes according to the amount of wear on the rope groove δ1, and the amount of wear on the rope groove δ1 reaches the abnormal wear amount, the rotation amount of the detection rod 14 from the reference position becomes the abnormal wear rotation amount. To reach. Thereby, the action | operation part of the detection rod 14 contacts the fixed contact 22, and the wear abnormality of the rope groove 7a is detected. Then, the power of the power source 23 is supplied to the lamp 24, the lamp 24 is turned on, and the occurrence of abnormal wear of the rope groove 7a is notified. Therefore, the maintenance staff can determine whether or not the wear abnormality of the rope groove 7a has occurred only by confirming that the lamp 24 is turned on at the time of maintenance and inspection.

Therefore, according to the third embodiment, the maintenance staff can determine whether or not the abnormal wear of the rope groove 7a has occurred only by confirming that the lamp 24 is turned on at the time of maintenance and inspection. The load is reduced and the measurement workability is improved.

In the third embodiment, the control panel 6 is separated from the electric circuit 21. However, the control panel 6 may be able to receive a detection signal for abnormal wear of the electric circuit 21. As a result, the occurrence of abnormal wear on the sheave groove is output from the control panel 6 to the monitoring center, and a rapid response to the abnormal wear on the sheave 7 is enabled.

Claims

In the elevator sheave groove wear amount detection device for the elevator that lifts and lowers in the hoistway by the rotation of the sheave, the carriage and the counterweight are connected via a rope spanned between the sheave and the deflector.
It is arranged to be rotatable about a rotation axis parallel to the axis of the sheave, and to be inserted into a portion of the sheave groove of the sheave facing the sled wheel of the sheave groove, and the one end side of the sheave groove. The amount of rotation when pressed against the detection rod changes according to the amount of wear on the rope groove,
A wear abnormality detector that detects that the amount of rotation of the detection rod from the rotation position of the detection rod when the rope groove is not worn has reached the amount of abnormal wear rotation;
Elevator levee wear amount detecting device equipped with
2. The amount of wear on the rope of the elevator according to claim 1, wherein the number of the detection rods is equal to the number of the ropes, and each of the detection rods is disposed so that the one end side can be inserted into the rope of interest. Detection device.
3. The elevator rope groove wear amount detecting device according to claim 1, further comprising a first elastic member for urging the detector bar so as to press the one end side of the detector bar against the rope groove.
A second elastic member for biasing the detection rod so as to separate the one end side of the detection rod from the rope groove;
An electromagnetic coil that is energized and that generates a driving force that presses the one end side of the detection rod against the rope groove against the urging force of the second elastic member. Item 3. An apparatus for detecting the amount of wear on a rope groove of an elevator according to Item 2.
5. The wear abnormality detection unit is a limit switch or an electric circuit that is disposed on the other end side of the detection rod and is closed by the detection rod that has reached the amount of abnormal wear rotation. Elevator rope groove wear detection device.
6. The elevator rope groove wear amount detecting device according to claim 5, further comprising a control device for detecting the closing of the wear abnormality detecting section and outputting the wear abnormality of the rope groove to the outside.
6. The apparatus for detecting the amount of wear in a rope groove of an elevator according to claim 5, further comprising a wear abnormality notification device for detecting the closure of the wear abnormality detection unit and notifying the wear abnormality of the rope.