JP2001199654A - Abrasion detector of guide shoe for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the inspection time for the abrasion state of a guide shoe. SOLUTION: This detector comprises the guide shoe 1 mounted on a car 3 of an elevator for guiding the vertically movable car along a guide rail 2, a shoe 41 mounted on the guide shoe and having a predetermined gap with respect to the guide rail, a conductor 42 buried in the shoe, and detecting means 6, 7 for detecting the electric characteristic of the conductor 42. As the conductor 42 buried in the shoe 41 is also worn when the shoe 41 is worn, a degree of abrasion can be known on the basis of the electric characteristic of the conductor 42 without diassembling the guide shoe 1, whereby the state of the abrasion can be easily inspected, and a working time necessary for the maintenance and inspection of an elevator device can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide shoe provided on an elevator car and / or a counterweight for guiding an ascending and descending car and / or a counterweight along a guide rail. The present invention relates to an elevator guide shoe wear detection device for detecting wear of a shoe being mounted.

[0002]

2. Description of the Related Art Normally, elevator cars and counterweights are lifted and lowered along guideways which are provided for elevator cars or counterweights along hoistways, respectively. It is located on both sides of the basket and counterweight. For example, in the car, the upper and lower sides of each side
A plurality of guide shoes are provided, and each guide shoe is formed so as to surround the guide rail on each side from three sides.

[0003] Such a guide shoe prevents the passenger from shaking up and down the elevator car and guides the car to the guide rail so as to maintain quietness so as not to cause discomfort to the passengers. Therefore, inspection and maintenance of the guide shoe are indispensable for the operation of the elevator device.

Therefore, a conventional guide shoe will be described with reference to FIGS. Note that FIG.
FIG. 14 is a side view showing a guide shoe provided above a car engaged with a guide rail, and FIG. 14 is a cross-sectional view taken along line AA of FIG.

As shown in FIGS. 13 and 14, a guide shoe 1 is mounted on an elevator car 3 so as to engage with a guide rail 2. The guide rails 2 are erected so as to be located on both sides of the car 3 along the hoistway of the elevator apparatus. However, here, only one guide rail 2 is shown, and further, a guide shoe is provided. 1 is also provided above and below the car 3, but here only the upper guide shoe 1 is shown.

An engaging portion of the guide shoe 1 with the guide rail 2 has a frame 1a having a U-shaped cross section so as to surround three sides of the guide rail 2. And the frame 1a
A shoe 4 is fixed to the inner surface of the guide rail 2 such that a predetermined gap is provided between the upper surface and both side surfaces of the guide rail 2. The shoe 4 is formed of a slippery and wear-resistant material.

Therefore, even if the car 3 shakes when ascending and descending, the shoes 4 of the four guide shoes 1 mounted on the left, right, up and down of the car 3 come into contact with the guide rails 2, Since the car 3 is held by the guide rails 2 in the range of the predetermined gap, the car 3 is guided to ascend and descend without the car 3 swinging any more.

[0008]

As described above, when the car 3 moves up and down, the car 3 swings and the shoe 4 of the guide shoe 1 comes into contact with the guide rail 2. The shoe 4 gradually wears by repeating the contact with the guide rail 2, and as the wear progresses, the gap between the shoe 4 and the guide rail 2 increases. Therefore, the swing width of the car 3 becomes large, and the car 3
It was feared that the noise entering the interior would increase, making the ride of the elevator uncomfortable and sometimes giving passengers anxiety.

Therefore, when the shoe 4 is worn to a certain size, it needs to be replaced, and the condition of the wear has been regularly inspected. However, it is difficult to visually check the wear of the shoe 4 from outside because the gap between the shoe 4 of the guide shoe 1 and the guide rail 2 is narrow. Then, the degree of wear had to be determined by measuring the thickness of the shoe 4. Therefore, it takes a long working time to disassemble or assemble the guide shoe 1, and the stop time of the elevator device for maintenance and inspection is prolonged, which causes trouble for the user.

An object of the present invention is to solve such a problem and reduce the time required for maintenance and inspection for maintaining the riding comfort and safety of an elevator car.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problem, an invention according to claim 1 is provided in a guide shoe wear detecting apparatus for an elevator, wherein the apparatus is provided on a car and / or a counterweight of the elevator, and is provided with a lift. A guide shoe for guiding a moving car and / or a counterweight along a guide rail, a shoe provided on the guide shoe so as to have a predetermined gap with respect to the guide rail, and a shoe embedded in the shoe. It is characterized by comprising a conductor and a detecting means for detecting an electrical characteristic of the conductor.

As a result, when the shoe wears, the conductor embedded in the shoe also wears, so that the degree of wear can be known from the electrical characteristics of the conductor without disassembling the guide shoe. Maintenance inspection becomes extremely easy.

The invention described in claim 2 is the first invention.
The guide shoe wear detecting device for an elevator according to the item (1), wherein a plurality of conductors are embedded in the shoe at the same depth from a surface facing the guide rail.

Thus, even if the degree of wear of the shoe is uneven, it is detected where the wear is progressing, so that it is easy to take measures such as adjusting the mounting state of the guide shoe to correct the unevenness. Become.

[0015] The invention described in claim 3 is based on claim 1.
5. The guide shoe wear detecting device for an elevator according to claim 1, wherein a plurality of conductors are embedded in the shoe at different depth positions from a surface facing the guide rail.

[0016] This makes it possible to know the progress of wear in stages, so that it is easy to understand the timing of shoe replacement and to formulate and prepare plans for maintenance and the like.

The invention described in claim 4 is the same as the claim 2.
Alternatively, in the guide shoe wear detecting device for an elevator according to claim 3, a deepest position of the conductor embedded in the shoe is a position corresponding to a wear limit dimension of the shoe.

As a result, expensive shoes can be used up to the limit value, which is economically advantageous.

The invention described in claim 5 is the first invention.
5. The apparatus according to claim 4, wherein the detecting unit detects an electrically conductive or non-conductive state of the conductor. 6.

Thus, the detection of the wear state is simple and reliable.

The invention described in claim 6 is the first invention.
5. The apparatus according to claim 4, wherein the detection unit detects a current or a voltage drop flowing through the conductor while a voltage is applied to the conductor. 6. It is characterized by doing.

Thus, the state of wear can be detected in more detail.

According to a seventh aspect of the present invention, in the guide shoe wear detecting device for an elevator according to any one of the second to sixth aspects, the detecting means includes the plurality of conductors. Are provided separately for each.

Thus, even when the wear state is uneven, it is possible to specify where the wear is occurring,
Useful data for adjusting the mounting state of the guide shoe can be obtained.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator guide shoe wear detecting apparatus according to the present invention will be described below in detail with reference to FIGS. In these drawings, the same parts are denoted by the same reference numerals. The same parts as those in FIGS. 13 and 14 are denoted by the same reference numerals.

FIGS. 1 to 3 show a first embodiment of an apparatus for detecting wear of a guide shoe of an elevator according to the present invention. FIG. 1 shows a guide engaged with a guide rail. FIG. 2 is a sectional view of the same portion as FIG. 14 showing the shoe, FIG. 2 is a perspective view showing the shoe in an enlarged manner, and FIG.
It is explanatory drawing of a wear detection means.

The guide shoe 1 is attached to the elevator car 3 so as to engage with guide rails 2 which are provided upright on both sides of the car 3 along the hoistway of the elevator apparatus. ing. The engaging portion of the guide shoe 1 with the guide rail 2 has a frame 1 a having a U-shaped cross section so as to surround three sides of the guide rail 2. The shoe 41 is fixed to the inner surface of the frame 1a such that a predetermined gap is provided between the upper surface and both side surfaces of the guide rail 2. This shoe 4
1 is formed of a slippery and wear-resistant material having electrical insulation properties.

Shoe 4 fixed to the inner surface of frame 1a
A conductor 42 is embedded in 1. This conductor 4
2 is a position corresponding to the wear limit dimension of the shoe 41. That is, the shoe 41
Is formed to a predetermined thickness, and the frame 1a of the guide shoe 1
In the initial state, a predetermined gap is provided between the surface of the shoe 41 and the surface of the guide rail 2. However, running the elevator apparatus for a long period of time causes the shoes 41 to wear, so that the gap between the surface of the shoes 41 and the surface of the guide rail 2 gradually widens. Therefore, the limit value of the allowable wear of the shoe 41 until the gap reaches the maximum allowable size is defined as the shoe 4.
The wear limit dimension is 1. However, it is assumed that the guide rail 2 does not wear. Note that the conductor 42 is not limited to the position of the wear limit dimension, and may be embedded in the wear depth of the shoe 41 to be detected.

A detection circuit as shown in FIG. 3 is connected to the conductor 42 embedded in each shoe 41. That is, one side of the conductor 42 is connected to the power source 6 by the electric wire 5, and the other side of the conductor 42 is connected to the power source 6 by the electric wire 8 via the relay 7. The contact 71 of the relay 7 is connected to, for example, the indicator light 9 and the power supply 1.
0 forms a closed circuit.

In such a configuration, the coil of the relay 7 is normally excited through the conductor 42, so that the contact 71 is closed and the indicator lamp 9 is turned on. However, the shoe 41 comes into contact with the guide rail 2 due to the swing of the car 3 caused by the elevation of the car 3 and the wear of the shoe 41 progresses while repeating this contact. Then, the conductor 42 is also worn simultaneously with the wear of the shoe 41, and when the wear further proceeds, the conductor 42 is cut. Therefore, when the conductor 42 is cut off, no voltage is applied from the power supply 6 to the relay 7, and the contact 71 of the relay 7 is opened to turn off the indicator light 9 and detect that the wear of the shoe 41 has reached the limit. Is done.

Needless to say, the contact 7 of the relay 7
If the indicator 1 is of a type that opens when excited, the indicator light 9 is normally turned off and can be turned on when the conductor 42 is cut off. It is good also as an alarm which emits etc.

Next, a second embodiment of the present invention will be described with reference to FIGS. Note that FIG.
FIG. 5 is a cross-sectional view showing the guide shoe in a state engaged with the guide rail, FIG. 5 is an enlarged perspective view of the shoe, and FIG. 6 is an explanatory view of the wear detecting means. 4 is a diagram corresponding to FIG.

In this embodiment, a single conductor 42 is embedded in the shoe 41 of the guide shoe 1 described in the first embodiment. Book conductors 42a, 42b, 42
c is embedded, and the embedding depth is the same depth from the surface of the shoe 41. Then, as shown in FIG. 6A, each of the conductors 42a, 42b, 42
The relays 7a, 7b, and 7c are connected in series to c, respectively, and are connected to the power supply 6. In addition, the relay 7a,
Although the illustration of the contacts 7b and 7c and the indicator lights is omitted, they are configured in the same manner as the first embodiment shown in FIG.

The reason why the plurality of conductors 42a, 42b, 42c are embedded in the shoe 41 is that the guide rail 2 depends on the structure of the building and how the elevator apparatus is installed.
This is because the shoe 41 of the guide shoe 1 does not necessarily come into contact with the shoe on average, but may come into contact with the shoe in a biased manner. In such a case, if the conductor 42 is embedded only in one place in the shoe 41, and the position of the shoe 41 in which the conductor 42 is embedded Even if the shoe 41 wears, the conductor 42 does not wear and the conductor 42 is not easily cut, so that it is predicted that the wear of the shoe 41 cannot be detected.

Therefore, by embedding the plurality of conductors 42 at the same depth, even if the wear of the shoe 41 does not progress evenly, any one of the plurality of Is cut off, so that wear of the shoe 42 can be reliably detected. Then, the cut conductors 42a, 42
Since b and 42c can be specified from the operation of the relays 7a, 7b and 7c, it is also possible to know which part of the shoe 41 wears quickly. Therefore, it is easy to take measures such as adjusting the mounting state of the guide shoe 41 to correct the bias of wear.

FIG. 6A shows each of the conductors 42a,
Although the configuration in which the relays 7a, 7b, and 7c are connected in series to 42b and 42c, respectively, is shown, it is not necessary to specify the position where the wear is uneven, and if it is simply to detect the progress of the wear. As shown in FIG. 6B, the conductors 42a, 42b, 42c may be connected in parallel, and one relay 7 may be connected in series. In FIG. 6B, the illustration of the shoe 41 is omitted.

Next, a third embodiment of the present invention will be described with reference to FIGS. 7 correspond to FIG. 4, FIG. 8 corresponds to FIG. 5, and FIG. 9 corresponds to FIG.

In this embodiment, the conductors 42a, 42b and 42c described as the second embodiment
A plurality of, for example, two conductors 42d and 42e are buried at the same depth from the surface of the substrate 1 and separately at different depth positions. Then, as shown in FIG. 9A, the relays 7a, 7b, 7c, 7d, 7e are connected in series to the conductors 42a, 42b, 42c, 42d, 42e, respectively, and are connected to the power supply 6. I have. Although the illustration of the contacts of the relays 7a to 7e and the indicator lights is omitted, they are configured in the same manner as the first embodiment shown in FIG.

The reason why the plurality of conductors 42a to 42e are buried in the shoes 41 at different positions in the shoe 41 is as follows. This is to facilitate planning and preparation of a plan for grasping the timing and maintenance.

That is, when the shoe 41 comes into contact with the guide rail 2, the conductor 42 is worn together with the shoe 41.
As the wear progresses, the conductors 42a, 42b, and 42c embedded at positions near the surface of the shoe 41 are cut, and this is detected by the operation of the relays 7a, 7b, and 7c. As a result, the first progress of the wear progress is achieved.
The stage can be detected. As the wear further progresses, the next conductors 42d and 42e are cut, which indicates that
Detected by operations d and 7e. Thereby, the second stage of the progress of wear can be detected.

By embedding the conductor 42 at various depths of the shoe 41 in this manner, the shoe 4
Because you can know the progress of the wear in step by step,
It becomes easy to grasp the replacement time of the shoe 41 and to formulate and prepare a plan for maintenance and the like.

FIG. 9 (a) shows a configuration in which the relays 7a to 7e are connected in series to the conductors 42a to 42e, respectively. However, it is not necessary to specify the position where the wear is uneven. Instead, if it is only necessary to detect the progress of the wear stepwise, as shown in FIG. 9B, the conductors 42a, 42b near the surface of the shoe 41,
42c may be connected in parallel, and conductors 42d and 42e located deep in the shoe 41 may be connected in parallel, and one relay 7f and 7g may be connected in series to each. In FIG. 9B, the illustration of the shoe 41 is omitted.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. In these figures, FIG. 10 corresponds to FIG. 1 and FIG. 11 corresponds to FIG.
FIG. 12 corresponds to FIG.

This embodiment is different from the first to third embodiments in that, instead of the linear conductor 42 embedded in the shoe 41 of the guide shoe 1, a surface is exposed on the surface of the shoe 41. The conductor 43 in the shape of a circle is fitted. Then, as shown in FIG. 12, a current / voltage detection unit 11 such as an ammeter or a voltmeter is connected in series to the conductor 43 as a detection circuit in place of the relay 7, and
The signal from the voltage detector 11 is led to the wear determiner 12,
The degree of wear of the conductor 43 is determined from a change in current or voltage based on a change in the resistance value of the conductor 43.

That is, as the car 3 moves up and down, the guide rail 2 comes into direct contact with the conductor 43 fitted into the shoe 41. Therefore, as the contact with the guide rail 2 is repeated, the wear of the conductor 43 progresses,
Therefore, the cross-sectional area of the conductor 43 decreases and the resistance value increases. As the resistance of the conductor 43 increases, the current flowing through the conductor 43 decreases, or the voltage drop at the conductor 43 increases. Therefore, the amount of change is detected by the current / voltage detection unit 11, and based on the amount of change in current or voltage detected by the current / voltage detection unit 11, the wear determination unit 12
Then, the progress of wear of the conductor 43, that is, the shoe 41, is determined.

As a result, the progress of the wear of the shoe 41 can be grasped in more detail, and the time for replacing the shoe 41 can be determined.

As described above, according to the present invention, since the wear of the shoe 41 can be detected and taken out as a signal, the wear can be detected at a remote place via an elevator control device and a communication device attached to the elevator control device. It is also possible to notify the existing monitoring center of the wear of the shoe 41. Further, in each embodiment, the guide shoe 1 installed on the car 3 has been described, but it goes without saying that the present invention can be similarly applied to a guide shoe installed on a counterweight.

[0048]

As described in detail above, according to the present invention,
Since the degree of wear of the shoe can be known without disassembling the guide shoe, maintenance of the elevator device can be extremely easily performed, and the stop time of the elevator device for maintenance and inspection can be reduced. Further, it is possible to prevent a decrease in the riding comfort of the elevator due to excessive wear of the shoes.

In particular, according to the first aspect of the present invention, when the shoe wears, the conductor embedded in the shoe also wears, so that the degree of wear can be known from the electrical characteristics of the conductor, and the guide can be known. The situation can be grasped more reliably than when the shoe is disassembled and visually checked, and maintenance and inspection of the elevator apparatus become extremely easy.

According to the second aspect of the present invention, even if the degree of wear of the shoe is uneven, it is detected where the wear is progressing, so that the guide shoe for correcting the unevenness can be detected. It becomes easy to take measures such as adjusting the mounting state.

According to the third aspect of the present invention, the progress of wear can be known in a stepwise manner, so that it is easy to comprehend the timing of shoe replacement and to formulate and prepare a plan for maintenance and the like.

According to the fourth aspect of the present invention, expensive shoes can be used up to the limit value, which is economically advantageous.

According to the fifth aspect of the present invention, the detection of the wear state is simple and reliable. Further, according to the invention described in claim 6, the state of wear can be detected in more detail.

Further, according to the invention of claim 7,
Even when the wear state is uneven, it is possible to specify the place where the wear is occurring, and it is possible to obtain useful data when adjusting the mounting state of the guide shoe.

[Brief description of the drawings]

FIG. 1 is a first view of a guide shoe wear detecting device according to the present invention.
It is sectional drawing of the guide shoe shown for describing Embodiment of this invention.

FIG. 2 is an enlarged view of a shoe portion shown in FIG.

FIG. 3 is a system diagram showing an example of a circuit for detecting wear of a shoe in the first embodiment.

FIG. 4 is a sectional view of a guide shoe showing a second embodiment of the present invention.

FIG. 5 is an enlarged view of a shoe portion shown in FIG.

FIG. 6 is a system diagram of a circuit for detecting wear of a shoe in a second embodiment.

FIG. 7 is a sectional view of a guide shoe showing a third embodiment of the present invention.

FIG. 8 is an enlarged view of a shoe part shown in FIG. 7;

FIG. 9 is a system diagram of a circuit for detecting wear of a shoe in a third embodiment.

FIG. 10 is a sectional view of a guide shoe showing a fourth embodiment of the present invention.

11 is an enlarged view of the shoe shown in FIG.

FIG. 12 is a system diagram of a circuit for detecting wear of a shoe in a fourth embodiment.

FIG. 13 is a side view of a guide shoe attached to an upper part of a car and engaged with a guide rail, for illustrating a conventional guide shoe.

FIG. 14 is a cross-sectional view as seen from the direction of the line AA in FIG. 13;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide shoe 2 Guide rail 3 Riding car 6 Power supply 7 Relay 41 Shoe 42 Conductor

Claims (7)

[Claims] 1. A guide shoe provided on a car and / or counterweight of an elevator for guiding an ascending / descending car and / or counterweight along a guide rail; A guide shoe wear for an elevator, comprising: a shoe provided with a predetermined gap; a conductor embedded in the shoe; and detection means for detecting an electrical characteristic of the conductor. Detection device. 2. The apparatus according to claim 1, wherein a plurality of conductors are embedded in the shoe at the same depth from a surface facing the guide rail. . 3. The guide shoe wear detection of an elevator according to claim 1, wherein a plurality of conductors are embedded in the shoe at different depth positions from a surface facing the guide rail. apparatus. 4. The elevator according to claim 2, wherein a deepest position of the conductor embedded in the shoe is a position corresponding to a wear limit dimension of the shoe. Guide shoe wear detector. 5. The elevator guide according to claim 1, wherein the detecting unit detects an electrical conduction or non-conduction state of the conductor. Shoe wear detector. 6. The apparatus according to claim 1, wherein said detecting means detects a current or a voltage drop flowing through said conductor while a voltage is applied to said conductor. Item 4. The guide shoe wear detection device for an elevator according to the item [1]. 7. The guide shoe of an elevator according to claim 2, wherein said detecting means is provided separately for each of said plurality of conductors. Wear detector.