JP2004307116A - Wire breakage detecting means of wire rope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire breakage detecting means of a wire rope that has a simple constitution, is inexpensive, and can check presence or absence of the wire breakage by easy work (visual observation). <P>SOLUTION: The wire breakage detecting means of the wire rope has a pair of frame members 22 that have a recessed part and are openable or closable mutually, and paper 23 as an easily damaged member that is disposed in the recessed part of each frame member 22 and is damaged by abutting of a steel wire. The easily damaged member 23 has linear side sections 23a. When the pair of frame members 22 are closed, the side sections 23a of the easily damaged member 23 form a clearance D slightly larger than the diameter of the wire rope 4, and are disposed in parallel. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wire rope breakage detecting device. More specifically, the present invention relates to a wire breakage detection device for detecting when a part of a wire made of, for example, a steel wire constituting a wire rope used in an elevator or the like is cut.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, it has been required to periodically perform maintenance and inspection of a building elevator and a vehicle elevator of a parking device, and the inspection items include the presence or absence of a broken wire of a wire rope. Inspections need to be performed over their entire length, usually several hundred meters, which is a very time consuming and heavy labor.
[0003]
Therefore, various devices for inspecting a wire rope for broken wires have been proposed. For example, there is a known configuration in which a wire rope to be tested is inserted between a pair of magnetic poles (S-N), and a magnetic flux passes through the rope portion (Patent Documents 1 and 2). All are equipped with a detector for detecting a change in magnetic flux. In addition, all the devices inspect the wire break while moving the device along the wire rope to be inspected.
[0004]
In addition, there has been proposed one in which a pair of electrodes slightly spaced apart from each other is installed in proximity to a wire rope to be tested (Patent Document 3). In most cases, when the wire of the wire rope to be inspected is cut, the cut end protrudes outward from the wire rope. Therefore, when the protruding portion contacts the pair of electrodes, the two are brought into conduction. By detecting this, the cutting is detected.
[0005]
A cutting detection device using a pressure sensor has also been proposed. This device is composed of a funnel-shaped tubular body divided into two through which a wire rope passes, and a holder provided outside the device via a pressure sensor (Patent Document 4). If the cut portion of the wire protrudes, it is dragged by the funnel-shaped tubular body and the pressure sensor is operated, so that it can be detected.
[0006]
There has been proposed a detector comprising a cylindrical body having an elastic tongue therein (Patent Document 5). When the wire rope to be tested is inserted through this tubular body and the tubular body is moved along the wire rope in this state, if there is a broken wire, that part is caught by the elastic tongue, and the movement stops. . This is intended to detect a broken wire.
[0007]
There has been proposed an apparatus in which a movable body connected to a thin conductive wire is installed at a position where a wire rope passes (Patent Document 6). When the wire rope is moved and the protruding wire break portion is hooked and moved by the movable body, the conductive wire is cut, so that the wire break is detected.
[0008]
[Patent Document 1]
JP-A-11-230947 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-241393 [Patent Document 3]
JP 2001-151433 A [Patent Document 4]
Japanese Patent Application Laid-Open No. Hei 8-11939 [Patent Document 5]
Japanese Utility Model Publication No. 5-20779 [Patent Document 6]
Published Japanese Utility Model Application No. 6-73071
[Problems to be solved by the invention]
However, the devices disclosed in Patent Documents 1 to 4 and 6 are devices that detect electrically and magnetically, and are large and expensive. In Patent Literatures 1, 2, and 5, the apparatus has to be moved along a long wire rope to be inspected, resulting in heavy labor. In addition, in the case of the device disclosed in Patent Document 3, it is doubtful whether the cut portions actually come into contact with each other so as to conduct the two electrodes well. Furthermore, it is questionable whether the cut of the strand can actually move the movable body.
[0010]
The present invention has been made in order to solve such a problem, and has a simple and inexpensive structure, a wire rope breakage detection device capable of detecting a wire breakage with a simple operation, and It is an object of the present invention to provide an elevator elevating device provided with a detection device.
[0011]
[Means for Solving the Problems]
The wire rope breakage detecting device of the present invention has a easily damaged member which can be installed in proximity to the wire rope and which is damaged by the contact of the steel wire. When the wire is cut, the tip of the wire protrudes outward from the wire rope, so that the cut end of the wire is damaged or damaged by the movement of the wire rope. Leave a trace of it. If this trace is found, it can be confirmed that the strand is broken. As described above, it is possible to easily check for broken wires without using complicated and expensive electric and magnetic devices and without having to move the device along a long wire rope.
[0012]
Preferably, an insertion hole through which the wire rope is inserted is formed in the easily damaged member so that the easily damaged member surrounds the periphery of the wire rope in a non-contact manner. This is because the detection accuracy of the broken wire is improved.
[0013]
Another wire rope break detection device of the present invention,
A pair of frame members that can be opened and closed with each other, and an easily damaged member that is installed inside each frame member and that is easily damaged by abutment of a steel wire. A semicircular notch is formed to form an insertion hole through which the wire rope can be inserted when the members are closed.
[0014]
With such a configuration, a wire breakage detecting device that is easy to manufacture and install and that has improved wire breakage detection accuracy is realized.
[0015]
Still another wire rope break detection device of the present invention,
It has a pair of mutually openable and closable frame members having a concave portion, and an easily damaged member installed in the concave portion of each frame member, the easily damaged member being damaged by contact with a steel wire, and the easily damaged member is linear. When the pair of frame members are closed, the sides of the easily damaged member become parallel to form a gap slightly larger than the diameter of the wire rope.
[0016]
Even with such a configuration, a wire breakage detection device that is easy to manufacture and install is realized.
[0017]
It is preferable that the easily damaged member is formed of any one of paper, clay, and a member having a coating applied to a surface facing the wire rope, or a combination thereof. This is because the cut end of the strand is easily damaged or broken, and the trace of the passage of the cut end can be clearly seen.
[0018]
The elevator lifting device of the present invention
Elevator wire rope with an elevator attached at one end and a counterweight attached at the other end, a drive motor, a drive sheave for winding up the wire rope, driven by the drive motor, and a drive sheave. A turning sheave disposed in proximity to the sheave; and a wire break detecting device installed on a wire rope passage between the driving sheave and the turning sheave. The device is constituted by any one of the wire breakage detection devices described above.
[0019]
Another elevator lifting device of the present invention includes:
An elevator wire rope having an elevator attached at one end, a drive motor, a drive motor, a hoist drum rotatably driven by the drive motor for winding and unwinding the wire rope, and a wire rope near the hoist drum And a wire rope breakage detecting device installed in the passageway of the above. The wire breakage detecting device is constituted by any one of the wire breakage detecting devices described above.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a wire breakage detection device (hereinafter simply referred to as a detection device) of the present invention and an embodiment of an elevator elevating device provided with the detection device will be described with reference to the accompanying drawings.
[0021]
FIG. 1 is a front sectional view showing an example of an elevator parking device (hereinafter simply referred to as a parking device) to which the elevator lifting device of the present invention can be applied.
[0022]
An elevator 3 for raising and lowering a pallet 2 for mounting on a vehicle is suspended by a wire rope 4 inside the parking device 1. A driving device (winding-up) which lifts and unwinds the wire rope 4 to raise and lower the elevator 3. (Device) 5 and a counterweight 6 are provided. On both sides of the hoistway 7 of the elevator 3, a multi-stage parking shelf (hereinafter simply referred to as a shelf) 8 for accommodating the vehicle M is provided. A rail (not shown) on which the pallet 2 can traverse is provided on each shelf 8, and the pallet 2 is placed on this rail.
[0023]
The elevator 3 moves up and down between the shelves 8 on both sides, moves to the shelf 8 of the called pallet 2, receives the pallet 2, and transports it to the loading / unloading floor E. Further, the pallet 2 carrying the vehicle M is transported and deposited from the entrance / exit floor E to the designated shelf 8. In this parking device 1, the entrance / exit floor E is the lowest floor (the first floor). The elevator 3 is provided with rails (not shown) for pallet traversing. When the elevator 3 reaches the position of the shelf 8 for delivery of the vehicle M, the rails face each other. Further, the elevator 3 is provided with a moving device (not shown) for receiving and returning the pallet 2 from the shelf 8.
[0024]
2 and 3 show the elevator 3 and its driving device 5. The elevator 3 is connected to the counterweight 6 by a wire rope 4 in a weight-balanced state. Reference numeral 10 denotes a lift guide rail of the elevator 3. The wire rope 4 has an intermediate portion wound around a hoisting sheave (called a driving sheave) 11 and a turning sheave 12 of the driving device 5. The wire rope 4 exits from the drive sheave 11 and is connected to the four corners of the substantially rectangular elevator 3 via a plurality of turning pulleys 12. Further, it is wound around the turning sheave 12 from the driving sheave 11 and is connected to the counterweight 6. A drive motor 14 is connected to the drive sheave 11 via a speed reducer 13. Reference numeral 15 denotes a coupling.
[0025]
The drive sheave 11 is rotated by the motor 14, and the wire rope 4 is pulled by the frictional force of the drive sheave 11 to move the elevator 3 up and down. The weight of the counterweight 6 makes the lifting and lowering forces of the driving device 5 uniform. In the present embodiment, since three wire ropes 4 are connected to each of the four corners of the elevator 3, grooves 16 for each rope are provided so that twelve ropes 4 are wound around each of the sheaves 11 and 12. Is formed. And, of course, the twelve rope portions between the sheaves 11 and 12 are each straight without being sagged by the tension. In this portion, since each rope 4 is engaged with the groove 16 of the sheaves 11 and 12 and is stretched by tension, the ropes 4 are aligned without being displaced in the direction perpendicular to the longitudinal direction (radial direction of the cross section of the rope). are doing. A strand break detecting device (hereinafter simply referred to as a detecting device) 20 is installed on the linear rope portion.
[0026]
As shown in FIG. 4, the detection device 20 includes a pair of U-shaped frame members 22 that can be opened and closed by hinges 21, and a steel wire is provided inside each of the frame members 22 (a concave portion). The easily damageable member 23 that is damaged by the contact of the member 23 is attached. The frame member 22 can be formed by bending a bar made of metal or synthetic resin into a semicircle, a C shape, or a U shape. The “steel wire” means a steel wire that is a strand of the wire rope 4. As the easily damaged member 23, paper in general including oil paper, paraffin paper, Kent paper, corrugated paper, clay board including paper clay board and diatomaceous earth board, gypsum board, and a combination thereof are preferable.
[0027]
When the easily damaged member 23 is paper, it is attached to the frame member 22 with an adhesive so that the surface of the paper is taut. The sides 23a of the easily damaged member 23 which are opposed to each other when the pair of frame members 22 are closed are formed in a straight line. Further, a spacer 24a and a mounting portion 24b are formed at an end (distal end) opposite to the hinge 21 side (base end) of the frame member 22. When the frame member 22 is closed, a gap D slightly larger than the diameter of the wire rope to be detected is formed between the sides 23a by the spacers 24a so that both sides 23a are parallel to each other. As shown in the figure, the detection device 20 is attached to a predetermined position so that a plurality of aligned wire ropes 4 are arranged in the gap D. At this time, the shortest distance between the outer peripheral surface of the wire rope 4 and the side 23a of the easily damaged member 23 may be reduced. This is because the wire rope 4 hardly displaces in the radial direction. Then, the mounting portion 24b at the distal end is bolted to the bracket 27 or the like.
[0028]
As shown in FIG. 5, a pair of U-shaped frame members 25 may be formed separately without providing the hinges and the spacers. Then, as shown in the figure, the projecting portions 26 are formed by projecting both ends of each frame member 25 outward. On the other hand, a bracket 27 is provided at a predetermined position, and two insertion holes 28 into which one protruding portion 26 is inserted and locked are formed in the bracket 27 at a predetermined interval. By doing so, the frame members 25 can be attached one by one. After that, the other protruding portions 26 of the two frame members 25 may be fixed to each other with a wire or the like (see FIG. 6).
[0029]
As shown in FIGS. 6 and 7, when the wire rope 4 has a wire break, the cut wire 4 a protrudes out of the rope. 23 (paper) is damaged B. That is, the strand cuts the side 23a of the paper. When the elevator 3 is inspected, the presence or absence of the wire break of the wire rope 4 can be easily confirmed by approaching the detection device 20 and visually observing the side 23a of the paper.
[0030]
FIG. 8 shows another detection device 30. The easily damaged member 31 used in the detection device 30 is not paper but a clay plate made of diatomaceous earth, clay, paper clay, or the like, or a gypsum plate. Since the clay plate (plaster plate) is thicker than paper, the pair of frame members 32 are each formed of a wide bar or plate. The overall shape of the frame member 32 has a U-shape as described above. The clay plate is attached to the inside of the frame member 32 with an adhesive or the like, but is not limited thereto. For example, a groove into which the periphery of the clay plate is fitted may be formed inside the frame member 32.
[0031]
The opposite side 31a of the easily damaged member 31 is not straight, but is formed with a plurality of semicircular cutouts 34 forming an insertion hole 33 through which the wire rope 4 can pass when the frame member 32 is closed. . The inner diameter of the insertion hole 33 is slightly larger than the cross-sectional diameter of the wire rope, and does not contact the inner surface of the insertion hole 33 even when the wire rope passes. The inner peripheral surface of the notch 34 is a smooth surface without irregularities. Therefore, traces (scratches, etc.) that can be visually confirmed by the sliding contact of the cut wires are formed. Of course, a thin clay plate (plaster plate) may be used, and the cut wire may be broken by sliding contact.
[0032]
The pair of frame members 32 have hinges 21 at their base ends, and can be opened and closed by each other. A spacer 35 and a mounting portion 36 are formed at the tip of the frame member 32. When the frame member 32 is closed, the contact of the spacer 35 prevents the clay plate from being inadvertently damaged. Further, the detection device 30 is installed by bolting the mounting portion 36 at the distal end to the bracket 27 or the like.
[0033]
The material of the easily damaged member 31 that can form the insertion hole 33 as described above is not limited to the clay plate. Any material that can maintain the shape of the insertion hole 33, such as corrugated paper, may be used. In short, any material may be used as long as the cut wire is easily damaged by sliding contact. Hereinafter, another example will be described.
[0034]
FIG. 9 shows a detection device 37 including a pair of frame members 38 in which a plurality of divided pipe members 38a are aligned and joined in parallel. The pair of frame members 38 can be opened and closed mutually by the hinge 21 at the base end. When the pair of frame members 38 are closed and overlapped, a plurality of insertion holes 39 through which the wire rope 4 can pass are formed. The inner surface of the tube member 38a is painted. When the cut wire comes into sliding contact with the inner surface of the pipe member 38a, the paint is scraped off and easily damaged. With such a configuration, it is possible to easily confirm the break of the wire. A known paint that is easily scratched may be selected. Also, since paint is important, the pipe member may be made of a hard material such as metal or synthetic resin. This detection device 37 also has a mounting portion 40 formed at the tip of the frame member 38. The mounting device 40 is bolted to the bracket 27 or the like, and the detecting device 37 is installed.
[0035]
Although the inner surface of the tube member 38a is painted, the present invention is not limited to this configuration. If the tube member is formed from a scratch-resistant synthetic resin such as an acrylic resin, a vinyl chloride resin, and a styrene resin, there is no need to apply a coating to the inner surface. This is because the material itself is easily damaged by sliding contact of the cut wire.
[0036]
Each of the detection devices described above has a simple configuration and can be manufactured at low cost. Moreover, the mounting is easy. Therefore, it is sufficient to prepare a large number of such detection devices and replace the damaged one with a new one at each inspection. Further, the attachment location is not limited to only one location. Since it is inexpensive, it may be installed at a plurality of locations if it is suitable. As in the above embodiment, if there are a plurality of sheaves around which the wire rope is wound, it is preferable to install them between them. This is because the wire rope does not easily swing. Even if it is a single sheave or a pulley, it is preferable to install the sheave or pulley close to the sheave or pulley because the wire rope hardly swings.
[0037]
In the above-described embodiment, the cut detection of the four wire ropes to be detected is performed by one detecting device, but the number of the wire ropes is not particularly limited to four. The number of wire ropes inserted into one detection device may be twelve, one, or another. 4 to 8, the width of the frame member may be increased or decreased. In addition, in the case of the detection device shown in FIG.
[0038]
In the above embodiment, paper, a clay plate, a gypsum plate, a paint, and a synthetic resin are given as examples of the easily damaged member, but the members are not limited to these. Any material that can be easily damaged or damaged by the wire (steel wire) of the wire rope can be used.
[0039]
In the above-described embodiment, an elevator lifting wire rope having a counterweight connected to the other end is taken as an example, but the invention is not limited to this. The present invention can also be applied to an elevating device that winds up and winds up a winding drum without using a counterweight.
[0040]
Further, in the above embodiment, the elevator elevating device in the elevator parking device has been described as an example, but the present invention is not limited to this. The present invention can be applied to a device using a wire rope, such as an ordinary elevator elevator for people, an escalator, and a crane.
[0041]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, a structure is simple and inexpensive, and the presence or absence of a wire break can be confirmed by simple work (visually) at the time of an inspection. Therefore, the replacement becomes easy, so that maintenance of the device itself is not required.
[Brief description of the drawings]
FIG. 1 is a front sectional view showing an example of an elevator parking device to which an elevator lifting device of the present invention can be applied.
FIG. 2 is a perspective view showing an example of an elevator and a lifting drive device for the elevator in the parking device of FIG. 1;
3 (a) is a plan view showing the elevator elevating / lowering drive device of FIG. 2, and FIG. 3 (b) is a sectional view taken along line III-III of FIG. 3 (a).
FIG. 4 is a front view showing an embodiment of a wire breakage detection device according to the present invention.
FIG. 5 is a front view showing another embodiment of the wire breakage detecting device of the present invention.
FIG. 6 is a front view illustrating the operation of the wire breakage detecting device of FIG. 5;
FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;
FIG. 8 is a front view showing still another embodiment of the wire breakage detection device of the present invention.
FIG. 9 is a perspective view showing still another embodiment of the wire breakage detecting device of the present invention.
[Explanation of symbols]
1, parking device 2, pallet 3, elevator 4, wire rope 5, driving device 6, counterweight 7, hoistway 8, etc. Shelf 11 Drive sheave 12 Turning sheave 13 Reduction gear 14 Motor 15 Coupling 16 Groove 20 (Line break) detecting device 21 hinge 22 frame member 23 easily damaged member 24a spacer 24b mounting portion 25 frame member 26 projecting Part 27: Bracket 28: Insertion hole 29: Wire 30: Wire breakage detector 31: Damage-prone member 32: Frame member 33 .. Insertion hole 34 Notch 35 Spacer 36 Attachment part 37 Location 38 ... frame member 39 ... through hole 40 ... mounting portion D ... gap E ... Goods Movement floor M ... vehicle

Claims (7)

An apparatus for detecting a broken wire of a wire rope, comprising an easily damaged member which can be installed in proximity to the wire rope and which is damaged by abutment of a steel wire. 2. The wire breakage detecting device according to claim 1, wherein an insertion hole through which the wire rope is inserted is formed in the easily damaged member so that the easily damaged member surrounds the periphery of the wire rope in a non-contact manner. It comprises a pair of frame members that can be opened and closed with each other, and an easily damaged member that is installed inside each frame member and that is easily damaged by contact with a steel wire, and the pair of frame members is closed by the easily damaged member. A wire rope breakage detecting device having a semicircular notch defining an insertion hole through which the wire rope can be inserted when the wire rope is inserted. A pair of mutually openable and closable frame members having a concave portion,
It is provided in a concave portion of each frame member, and includes an easily damageable member that is damaged by contact of a steel wire,
A wire in which the easily damageable member has a straight side portion, and when the pair of frame members are closed, the sides of the easily damageable member form a gap slightly larger than the diameter of the wire rope and are parallel to each other. Rope break detection device. The paper according to any one of claims 1 to 4, wherein the easily damageable member is made of paper, clay, and any one of members coated with paint on a surface facing the wire rope, or a combination thereof. Item 10. The wire rope breakage detecting device according to item 8. An elevator lift wire with an elevator attached to one end and a counterweight attached to the other end,
A drive motor,
A drive sheave for winding the wire rope, which is driven to rotate by the drive motor,
Turning sheaves located in close proximity to the drive sheave;
An elevator lifting / lowering device comprising: the wire breakage detecting device according to any one of claims 1 to 5, which is provided in a passage of a wire rope between the driving sheave and the turning sheave. An elevator lift wire rope with an elevator attached at one end,
A drive motor,
A winding drum driven by the drive motor to wind and unwind the wire rope;
An elevator lifting / lowering device comprising: the wire breakage detection device according to any one of claims 1 to 5, which is installed in a passage of a wire rope near the winding drum.

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