HK1151776A1 - Rope type elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately inspect the electric continuity of a rope, by preventing collapse of the rope.SOLUTION: A support device for fixing the rope 1 to a building or the like comprises a sandwiching type wedge member 2 for sandwiching the rope 1, a winding type wedge member 3 for winding and sandwiching the rope 1, a clip 4 and a socket 5 containing these, so that the collapse of the rope 1 covered with resin is prevented, and contact of mutual stranded wire bundles for constituting the rope is eliminated, improving rope inspection accuracy through electric continuity detection.

Description

Suspension cable type elevator

Technical Field

The present invention relates to a sling type elevator, and more particularly, to a device capable of solving a new problem caused by improvement of a sling and capable of realizing highly reliable sling detection.

Background

A suspension rope type elevator in which a suspension rope is wound around a sheave attached to a hoisting machine, and a counterweight for balancing the elevator car is suspended from one side of the sheave and from the other side of the sheave. The steel wire rope is fixed on the wall surfaces of the elevator car, the balance weight or the lifting channel through a wedge-shaped sleeve. The wedge-shaped sleeve is made by filling Babbitt alloy in a steel sleeve or arranging a steel wedge-shaped component in the steel sleeve.

However, in recent years, in order to reduce the size of a hoist and the diameter of a sheave, a sling, a rope, and the like, which are coated with resin and have excellent flexibility, have been developed. In the sling and the sling, the service life of the sling and the sling is improved by filling resin between strands formed by twisting steel wires to prevent the strands from contacting each other (see, for example, patent document 1). The sling or sling coated with resin is damaged and has a long service life due to fatigue of the wires caused by bending when passing through the sheave and the pulley, abrasion caused by relative sliding between the wires, and abrasion caused by relative sliding between the sling and the sheave groove. Since the outer layer of the sling or sling is coated with resin, the degree of damage to the inner wire cannot be checked visually.

As a method for inspecting a steel wire damage, an inspection is generally performed based on electric resistance. In this inspection method, for example, a resin at an end of a sling connected to a wall surface of an elevator car, a counterweight, or a hoistway is removed, a strand bundle is connected to a power supply, and a current is passed through the strand bundle, whereby damage of a steel wire is inspected by measuring a resistance. Specifically, when the wire is broken, the total cross-sectional area of the strand bundle is reduced, and the resistance is increased, whereby the damage of the wire can be checked by measuring the resistance (see, for example, patent document 2).

As a conventional technique, a technique has been developed in which an end portion of a sling is held by a wedge-shaped member and a sleeve, and in this technique, the sling is wound around the wedge-shaped member, and is held between the sleeve and the wedge-shaped member (for example, see patent document 3). As a holding device for holding an end portion of a strap coated with resin, there has been developed a technique of inserting an insert between a sleeve and a wedge member to uniformly distribute a pressure when the strap is held by the wedge member and holding the strap (see, for example, patent document 4).

Japanese patent application laid-open No. 2001-262482 of patent document 1

Patent document 2 Japanese patent application laid-open No. 2002-540419

Patent document 3 Japanese patent application laid-open No. 2001-165245

Patent document 4 Japanese patent application publication No. 2005-502562

As described above, in the sling for an elevator coated with resin, the strands are prevented from contacting each other by filling the resin between the strands, but as the sling repeatedly passes through a sheave mounted on a hoist, the resin filled between the strands is worn and dropped due to relative sliding between the strands and the resin, and thus the strands come into contact with each other. Due to the mutual contact between the strands, wear and corrosion occur between the steel wires, causing fatigue failure of the steel wires. Therefore, in detecting damage to the steel wire, it is more effective to detect the presence or absence of contact between the strands than to detect a change in electrical resistance when the cross-sectional area is reduced by wear. Since electrical conduction occurs between the strands when contact occurs between the strands, it is possible to detect whether or not there is contact between the strands by checking the electrical conduction between the strands, and thus to maintain the suspension cable.

However, when an end of a suspension rope is held on a building side or an elevator car by a suspension rope holding device and the suspension rope is held between a sleeve and a wedge member constituting the suspension rope holding device, if the suspension rope is squashed, contact between the strands occurs. In this case, it is impossible to distinguish whether the electrical conduction is caused by the contact between the strands to be inspected or the contact in the sling holding device, and therefore there is a problem that it is difficult to detect the damage of the sling with high accuracy.

Disclosure of Invention

The invention mainly aims to provide a sling type elevator which can prevent a sling from being flattened and can carry out high-precision conduction inspection.

Another object of the present invention is to provide a rope elevator having a high resistance to rope vibration and the like and excellent workability. The above objects of the present invention will be described in detail by the following examples.

In order to achieve the above-described main object, a rope-type elevator according to the present invention is provided with a conduction detector for detecting a conduction state of a rope, and a holding device for holding the rope on a building side or an elevator car or the like is configured by a holding type wedge member for holding the rope, a winding type wedge member for holding the rope by winding a distal end side of the rope held by the holding type wedge member around itself, a sleeve for pressing the holding type wedge member and holding the rope between the sleeve and the winding type wedge member, and a jig for binding the rope on the distal end side extending after being wound around the winding type wedge member and the rope on a winding start side of the winding type wedge member. With the above configuration, during normal operation of the elevator, the main load is held by the rope in the straightened state, and when the rope is about to fall out of the clamping type wedge member, the rope can be prevented from being squashed by the rope holding device by the clamping action of the winding type wedge member.

In order to achieve the above-described other object, in the sling elevator according to the present invention, a clamping member is provided between the clamping type wedge member and the winding type wedge member, and a sling extending from the clamping type wedge member toward the winding type wedge member and a sling at a distal end side extending after being wound around the winding type wedge member are clamped by the clamping member. Accordingly, the bearing capacity against the rope vibration and the like can be improved, and the reliability, the workability of the mounting work and the like can be improved by improving the structure and the like of the sleeve, and the details of the present invention will be described in detail by the following examples.

Effects of the invention

According to the main feature of the present invention, the sling is prevented from being flattened, so that the contact between the strands due to the sling holding device can be avoided, and thus the sling can be inspected with high precision using the conduction detector.

According to another feature of the present invention, it is possible to provide a sling elevator having a high detection reliability and a high resistance to vibration of a sling, and excellent installation workability. Other effects of the present invention are illustrated in the following examples.

Drawings

Fig. 1 is a cross-sectional view showing a sling holding device 1 according to an embodiment of the present invention.

Fig. 2 is a perspective view of the sling holding device of fig. 1.

Fig. 3 is a perspective view of a clip-type wedge member used in the sling holding device of fig. 1.

Fig. 4 is a perspective view of a winding type wedge member used in the sling holding device of fig. 1.

Fig. 5 is a cross-sectional view of an embodiment of a sling to which the invention is applied.

Fig. 6 is a schematic view showing an embodiment of a sling type elevator system to which the present invention is applied.

Fig. 7 is a schematic view showing another embodiment of a sling-type elevator system to which the present invention is applied.

Fig. 8 is a cross-sectional view showing a sling holding device according to embodiment 2 of the present invention.

Fig. 9 is a cross-sectional view of a clamping member used in the sling holding device of fig. 8.

Description of the symbols

1 suspension cable

2 clamping type wedge-shaped member

3-winding type wedge member

4 clamping apparatus

5 sleeve barrel

6 clamping member

10 elastomer

101 steel wire

102 strand

103 strand group

104 core strand group

105 side strand group

106 inner layer resin

107 outer resin

111 end of sling

501 clamping type wedge-shaped member bearing surface

502 large opening part

503 small opening part

504-winding type wedge member receiving surface

505 through hole

603 sling clamping surface

700 elevator car

701 counterweight

702 sheave

703 conduction detector

Detailed Description

Hereinafter, an embodiment of a suspension cable elevator according to the present invention will be described in detail with reference to the accompanying drawings. As shown in the drawings, a sling holding device in the shape of a sleeve is used as the sling holding device of the present invention.

Fig. 6 is an embodiment of a sling elevator system to which the present invention is applied. In this embodiment, a rope 1 is wound around a sheave 702 of a hoisting machine, and an elevator car 700 is suspended on one side of the rope and a counterweight 701 for balancing the elevator car is suspended on the other side of the rope. In the sling holding device of the present embodiment, the ends of the sling 1 are held on the ceiling surface of the hoistway using the sleeves 5. The sling holding device is configured to output an electric signal at the end of the sling from one of the sleeves 5 to the conduction detector 703, so that damage inspection of the sling can be always performed.

Fig. 7 is another embodiment of a sling elevator system to which the present invention is applied. In this embodiment, the elevator car 700 and the counterweight 701 are suspended in a bucket shape by the suspension rope 1, and the sleeve 5 constituting the suspension rope holding device is used to hold the suspension rope end to the elevator car 700 and the counterweight 701.

The sling holding device is used for holding the end part of a sling on a building side, an elevator car or a balance weight, and can detect the damage of the sling by outputting an electric signal at the end part of the sling to a conduction detector. Hereinafter, a configuration example of a sling holding device constituting the feature of the present invention will be described with reference to a plurality of examples, but the present invention is not limited to the above examples and the above application examples.

[ example 1]

As shown in fig. 1, the sling holding device according to embodiment 1 includes a clip-type wedge member 2, a winding-type wedge member 3, a clip 4 for binding the slings 1, and a sleeve 5. The clip-type wedge member 2 is divided into a plurality of parts and is provided to clip the rope 1, the winding-type wedge member 3 winds the rope 1 onto itself to clip the rope between the sleeve 5 and the winding-type wedge member 3, and the clip-type wedge member 2, the winding-type wedge member 3, and the clip 4 are inserted into the sleeve 5. The upper part of the sleeve 5 is fitted with a pin 8 and a ring rod 9, as shown in fig. 6 and 7, and the sling holding device is fixed to the wall surface of the elevator car, counterweight or hoistway. As shown in fig. 1, the sleeve 5 has a through hole 505 into which the clip-type wedge member 2 is inserted, a large opening portion 502 into which the winding-type wedge member 3 is inserted, and a small opening portion 503 into which the slings 1 are inserted.

Fig. 2 is a perspective view of the wire retainer of fig. 1, in which the clip 4 is mounted in the sleeve 5 through a through-hole 505 formed in the sleeve 5, and the wire end 111 connected to the conduction detector 703 is taken out from the through-hole 505. Further, the through-holes 505 are formed in both surfaces of the sleeve, so that the mounting work of the slings can be performed from both front and rear directions, thereby improving the workability.

As shown in fig. 3, the clip-type wedge member 2 is divided into a plurality of parts (for example, two parts) which are provided to clip the sling 1. The clip-type wedge member 2 clips and fixes the hoist rope 1 by a pressing force from a wedge member receiving surface (inclined surface) 501 inside the sleeve 5. The surface of the clip-type wedge member 2 that contacts the sling 1 is provided with a curved surface 201 conforming to the outer diameter of the sling 1. Further, as shown in fig. 3, for example, by embossing the curved surface 201, the friction coefficient between the slings 1 and the clip-type wedge members 2 can be increased, and thereby the slings can be prevented from slipping. In the present embodiment, the embossing process is performed on the curved surface 201 as an example, but other processes such as the sandblasting process may be performed.

As shown in fig. 4, the winding type wedge member 3 is formed of a linear groove 301 and a curved groove 302. In order to prevent the sling 1 from being squashed when the sling 1 is wound, the radius of curvature of the curved groove 302 is determined in accordance with the relationship with the diameter of the sling 1.

Since the clip 4 of fig. 1 needs to be fixed to the sling 1 with sufficient friction while suppressing the sling 1 from being squashed as much as possible, it is configured to have an abutting surface to limit the fastening amount of the bolt.

As shown in fig. 5, the suspension cable 1 is formed by twisting steel wires (wires) 101 to form strands (strand)102, twisting the strands 102 to form a strand bundle, i.e., a strand group (schenkel)103, and further twisting the strand group. A core strand group 104 is provided at the center of the suspension rope 1, and a plurality of side strand groups 105 are provided around the core strand group 104 at equal intervals in the circumferential direction of the suspension rope. An inner layer resin 106 made of, for example, polyurethane is filled between the core strand group 104 and the side strand group 105, and normally, the strands, i.e., the strand groups, do not come into contact with each other. Further, an outer layer resin 107 made of, for example, polyurethane is provided around the side strand group 105. Since the strand group 103 is covered with the outer resin 107 in this manner, the strand group 103 does not come into contact with other strand groups and the sheave under the protection of the outer resin 107.

The following describes a holding step when the slings are held by using the slings holding device of the present embodiment.

When the suspension rope 1 is connected to the holding device, the suspension rope 1 is clamped by the clamping type wedge member 2. Then, the slings 1 are pulled from the small opening portions 503. By pulling the slings 1, the slings 1 move from the inside of the sleeve toward the small opening portions 503. Since the clip-type wedge member 2 moves along the wedge member receiving surface 501 formed by the inclined surface toward the small opening part 503, the slings 1 are clipped by the clip-type wedge member 2. When the frictional force between the clamp type wedge member 2 and the sling 1 is larger than the frictional force between the clamp type wedge member 2 and the wedge member receiving surface 501, the clamp type wedge member 2 moves toward the small opening 503 together with the sling 1, and when the reaction force generated when the sling 1 is compressed and the pressing force of the clamp type wedge member 2 are balanced, the clamp type wedge member 2 stops moving.

Thereafter, the winding type wedge member 3 is inserted from the large opening portion 502, and the sling 1 is wound along the linear groove 301 and the curved groove 302, and the sling end portion 111 is taken out from the through-hole 505. The inclined surface of the sleeve 5 formed corresponding to the winding type wedge member 3 constitutes a receiving surface 504 of the winding type wedge member 3, and a clamping force is applied to the hoist rope 1 between the receiving surface 504 and the winding type wedge member 3.

Subsequently, the slings 1 are clamped by the clamps 4. In order to prevent the winding type wedge 3 from flattening the sling 1, the sling central portion 110 is bent at the time of fixing, thereby preventing the sling wound around the winding type wedge 3 from being affected by tension.

According to embodiment 1, the clip-type wedge members 2 divided into two parts clip the slings 1, so that the slings 1 can be fixed without bending the slings 1, and the slings 1 can be prevented from being squashed.

However, since the slings 1 are clamped by the clamp-type wedge members 2, the outer resin layers 107 of the slings 1 receive frictional force at the curved surfaces 201 of the clamp-type wedge members 2. This frictional force repeatedly acts on the outer layer resin 107, and may cause peeling of the outer layer resin 107. When the outer resin 107 is peeled off, the suspension rope 1 slips from the clip-type wedge member 2, and the rope middle portion 110 receives a load. When the sling middle portion 110 receives a load, the load generates a force to cause the sling 1 to fall off the winding type wedge member 3, but since the sling is sandwiched by the clip 4 and is sandwiched by the receiving surfaces 504, which are the inclined surfaces of the winding type wedge member 3 and the sleeve 5, the sling 1 can be prevented from falling off the sleeve 5 by the winding type wedge member 3 and the clip 4. By preventing the sling 1 from being squashed in this manner, it is possible to avoid the occurrence of contact between the strand groups 103, which are strand bundles, at the sling end 111 of the sling 1 coated with resin, and thus it is possible to inspect the sling 1 with high accuracy using the continuity detector.

[ example 2]

Fig. 8 is a cross-sectional view showing a sling holding device according to embodiment 2 of the present invention. In fig. 8, the same portions as those in fig. 1 are denoted by the same reference numerals.

As shown in fig. 8, the slings holding device of embodiment 2 is composed of a grip-type wedge member 2, a gripping member 6 gripping the slings 1, an elastic body 10, a winding-type wedge member 3 on which the slings 1 are wound, and a sleeve 5, wherein the grip-type wedge member 2 is divided into a plurality of parts and is provided to grip the slings 1, the elastic body 10 is inserted between the grip-type wedge member 2 and the gripping member 6, and the grip-type wedge member 2, the gripping member 6, the elastic body 10, and the winding-type wedge member 3 are provided inside the sleeve 5. Further, a pin 8 is installed on the upper portion of the sleeve 5, and a loop bar 9 is fixed to the pin 8, as shown in fig. 6 and 7, and a sling holding device is connected to a wall surface of an elevator car, a counterweight, or a hoistway.

As shown in fig. 9, the clamping member 6 is divided into, for example, 2 members, and is provided so that abutting surfaces of the 2 members are in contact with each other, and the bolts 601 are integrally combined to clamp the suspension wire 1. Specifically, by fastening the bolt 601 and bringing the abutting surface 602 into contact with each other, the position of the sling 1 can be prevented from being crushed due to excessive fastening of the bolt 601 while the position of the sling clamping surface 603 of the clamping member 6 is positioned. The clip member 6 needs to be fixed to the suspension rope 1 so as to have a sufficient frictional force while suppressing the suspension rope 1 from being squashed as much as possible. Therefore, in order to increase the friction coefficient between the sling clamping surface 603 and the sling 1, embossing or sandblasting may be performed.

As shown in fig. 8, a coil spring that generates an elastic force by compression is used as the elastic member 10, for example. Although a coil spring is used as the elastic member 10 in the present embodiment, the present invention is not limited to this, and a disc spring, for example, may be used as the elastic member. The disc spring can obtain a larger load with a smaller deflection than the coil spring. Therefore, by using the disc spring, the distance between the clip-type wedge member 2 and the clip member 6 can be shortened, and the length dimension of the sleeve 5 can be shortened. Further, a plate spring may be used in addition to the disc spring.

The rope holding device according to embodiment 2 will be described below with respect to an operation in which the tension of the rope 1 is loosened by vibration caused when the elevator car is braked suddenly, a passenger runs into the elevator car, or the like. When the rope holding device is connected to the wall surface of the hoistway, the rope 1 generates a force that lifts the rope holding device upward when the rope 1 is lifted upward. When the sleeve 5 is lifted upward by this force, the grip-type wedge member 2 floats upward with respect to the sleeve 5 if there is not a sufficient coefficient of friction between the grip-type wedge member 2 and the sleeve 5. Thereby, the pressing force of the clip-type wedge member 2 to the slings 1 is reduced, and the slings 1 are detached from the sleeves 5. At this time, the clip-type wedge member 2 is pressed toward the small opening part 503 by the clip member 6 and the elastic member 10, so that the clip-type wedge member 2 clips the slings 1 in time, and the falling-off of the slings 1 can be restricted to the minimum range.

On the other hand, when the rope holding device is fixed to the elevator car and the counterweight, the sleeve 5 is displaced due to emergency braking of the elevator car, running of passengers, and the like. At this time, the clamping force of the clip-type wedge member 2 to the suspension rope 1 is weakened by the movement toward the large opening portion 502. At this time, the suspension rope 1 moves in a direction to fall off the socket 5, but the clamping wedge members 2 move and clamp the suspension rope 1 while the suspension rope 1 moves by the clamping members 6 and the elastic bodies 10, so that the suspension rope 1 can be prevented from falling off.

The present invention is not limited to the above-described embodiment, and for example, the clip 4 shown in fig. 1 and the clip member 6 shown in fig. 8 may be used in combination, whereby the holding of the suspension cable 1 can be further enhanced and the safety can be improved. Specifically, the slings 1 are held by the holding type wedge members 2, and then the slings 1 are held by the holding members 6 shown in fig. 8. After that, the suspension rope 1 is wound around the winding type wedge 3, and then the suspension rope 1 is clamped by the clamp 4, whereby the suspension rope 1 can be more reliably held.

Claims (9)

1. A sling elevator in which an elevator car and a counterweight that ascend and descend in a building are suspended by a sling, and an end of the sling is held by any one of the building side, the elevator car, and the counterweight using a sling holding device, the sling elevator being characterized in that,

a conduction detector is provided for detecting the conduction state of the sling, and the sling holding device comprises: a clamping type wedge member that holds a sling in a clamping manner; a winding type wedge member that holds a sling by winding a distal end side of the sling held by the holding type wedge member around itself; a sleeve that presses the clamping type wedge member and clamps a sling between the sleeve and the winding type wedge member; and a clamp for bundling the sling at the end side which is extended after being wound on the winding type wedge-shaped component and the sling at the winding start side of the winding type wedge-shaped component.

2. The sling elevator according to claim 1,

the sling is a resin-coated sling obtained by filling resin between metal strand bundles, and the conduction detector is used for detecting the conduction state of the metal strand bundles constituting the resin-coated sling.

3. The sling elevator according to claim 1,

the clamping type wedge member, the clamp and the winding type wedge member are arranged in the hollow interior of the sleeve, and a through hole is formed at least on the side surface of the sleeve facing the clamp.

4. The sling elevator according to claim 3,

the electric signal at the end of the sling is transmitted to the conduction detector through a through hole arranged on the side surface of the sleeve.

5. The sling elevator according to claim 1,

the clip-type wedge member and the winding-type wedge member are provided in the hollow interior of the sleeve, and a pressing portion of the clip-type wedge member and a sling clip portion between the sleeve and the winding-type wedge member are formed by forming inclined surfaces on side surfaces of the sleeve, respectively.

6. A sling elevator in which an elevator car and a counterweight that ascend and descend in a building are suspended by a sling, and an end of the sling is held by any one of the building side, the elevator car, and the counterweight using a sling holding device, the sling elevator being characterized in that,

a conduction detector is provided for detecting the conduction state of the sling, and the sling holding device comprises: a clamping type wedge member that holds a sling in a clamping manner; a winding type wedge member that holds a sling by winding a distal end side of the sling held by the holding type wedge member around itself; and a clamping member which is positioned between the clamping wedge member and the winding wedge member and clamps the sling extending from the clamping wedge member to the winding wedge member and the sling at the tail end side extending after being wound on the winding wedge member.

7. The sling elevator according to claim 6,

an elastic body that presses the clamping type wedge member and the clamping member is provided between the clamping type wedge member and the clamping member.

8. The sling elevator according to claim 6,

the sleeve is provided with a clamping wedge-shaped member, a clamping member and a winding wedge-shaped member, and a through hole is formed on at least one side surface facing the clamping member.

9. The sling elevator according to claim 8,

a plurality of inclined surfaces are formed on the side surface of the sleeve, and the pressing force of the clamping type wedge member provided in the sleeve and the rope clamping force between the sleeve and the winding type wedge member act by the relationship with the inclined surfaces, respectively.