JP2002265162A - Rope gripping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rope gripping device capable of easily and efficiently clamping and gripping a rope and preventing careless dropping of parts for clamping. SOLUTION: The rope gripping device is provided with a support beam 37, a first gripping plate 41 attached to the support beam 37, a second gripping plate 42 movably attached to the support beam in an approaching/separating direction to the gripping plate 41 via a support bolt 47, recessed grooves 46, 53a, and 53b formed on the gripping plates 41 and 42, a screw hole 45 formed on the first gripping plate 41, and clamping bolts 51a and 51b inserted in the second gripping plate 42. The recessed groove 46 of the first gripping plate 41 and the recessed groove 53a of the second gripping plate 42 are mutually opposed and a main rope 4 is placed between the recessed grooves, the clamping bolt 51a is screwed into the screw hole 45 and fastened, and the main rope 4 is gripped by holding it between the recessed grooves 46 and 53a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope gripping device used for gripping and fixing a main rope in an elevator hoistway when replacing an elevator main rope.

[0002]

2. Description of the Related Art FIG. 6 shows a state in which a main rope of an elevator is exchanged, wherein 1 is a hoistway provided in a building, and a machine room 2 is provided at an upper end of the hoistway 1. The hoisting machine 3 is installed in the machine room 2.

A plurality of main ropes 4 are wound around a sheave 3a of the hoisting machine 3, and the main ropes 4 are pulled down into the hoistway 1, and a car 5 is mounted on one end of the main rope 4 and a counter 5 is mounted on the other end. Weights 6 are respectively attached, and the car 5 is driven by the hoisting machine 3 in a state in which the car 5 and the counterweight 6 are substantially balanced in weight, so that the car 5 moves up and down in the hoistway 1. Note that 7
Is a deflecting vehicle for deflecting the main rope 4 from the hoisting machine 3.

When replacing the main rope 4, the car 5
Is raised to the upper part in the hoistway 1, and the car 5 is supported using the chain block 10, and the counterweight 6 is supported via the beam member 12 installed in the pit 11. A rope gripping device 13 is provided in the hoistway 1 at a position substantially at the same level as the raised car 5, and the rope gripping device 13 grips and fixes the middle of the main rope 4.

[0005] The old main rope 4 is removed by cutting the main rope 4 directly above the gripping device 13, and the new main rope 4 a is connected to the car 5 through the hoisting machine 3 and the deflector wheel 7. It bridges between the counterweight 6 and replaces the old and new main ropes 4 and 4a.

FIG. 7 shows the structure of a conventional rope gripping device 13.
(A) and (B), 14 is a guide rail for counterweight, and a bracket 15 is attached to each of these guide rails 14 via a fastener 16, and a support beam 17 is screwed between these brackets 15. Member 1
8 so that it can be mounted horizontally.

The gripping device 13 includes a rope fixing plate 20 fixed to the side surface of the support beam 17 by a fastener 19, and the fastener 19 and the flat washer 2 are fixed to the rope fixing plate 20.
1, a spring washer 22, and a rope clip 24 fixed via a nut 23. The main rope 4 is sandwiched between the rope fixing plate 20 and the rope clip 24.
And the main rope 4 is firmly gripped and fixed.

[0008]

However, in such a conventional rope gripping device 13, the main rope 4
When gripping, the fastener 19, the flat washer 21, the spring washer 2
2, the nut 23 and the rope clip 24 must be handled as individual parts, which makes the operation of gripping the main rope 4 cumbersome and inefficient, and at the same time, removes the fine parts during the operation. There is a risk that it may fall to the lower part of the hoistway and cause unexpected danger.

When the main rope is replaced, it is necessary not only to hold the old main rope with the rope gripping device 13 but also to grip the new main rope. In, the new and old main ropes must be sandwiched and gripped by a common part.

The old main rope which has been used for many years has a smaller diameter than the new main rope. Therefore, when the old main rope is tightened and gripped under the same conditions by the common part of the gripping device 13, Even if the tightening pressure is appropriate for the old main rope, the tightening pressure will be excessive for the new main rope, which may cause the new main rope to be crushed or damaged, degrading the quality, and conversely If the tightening pressure for the new main rope is appropriate, insufficient tightening may occur when the old main rope is tightened, and the old main rope may shift and move.

The present invention has been made in view of such a point, and it is an object of the present invention to easily and efficiently clamp a main rope and to grasp the main rope without care. To provide a rope gripping device that does not have a risk of dropping onto a rope, and a rope gripping device that can tighten both the old and new main ropes with an appropriate pressure when tightening and gripping the old and new main ropes. It is in.

[0012]

According to a first aspect of the present invention, there is provided a rope gripping device for gripping and fixing a main rope in an elevator hoistway when the main rope of the elevator is replaced. A support beam to be provided, a first gripping plate attached to the support beam, and a second gripper movably attached to the support beam via a support shaft in a direction of coming and going with respect to the first gripping plate. Gripping plate, concave grooves formed in the first and second gripping plates, a plurality of screw holes formed in the first gripping plate, and inserted into the second gripping plate. A plurality of fastening bolts capable of being screwed into the screw holes, wherein the groove of the first gripping plate and the groove of the second gripping plate are opposed to each other, and between the two grooves. Place the main rope and tighten the fastening bolt with the screw It is characterized by gripping and sandwiched the main rope between the grooves and the grooves of the second gripping plate of the first gripping plate by tightening screwed in.

According to a second aspect of the present invention, in the first aspect of the present invention, the fastening bolt is provided with a retaining means for the second holding plate.

According to a third aspect of the present invention, in the first and second aspects of the present invention, the support shaft is provided with retaining means for the support beam.

[0015] The invention according to claim 4 is the invention according to claims 1, 2,
In the third aspect, the second gripping plate is rotatably supported via a support shaft, and the first and second concave grooves facing the concave grooves of the first gripping plate according to the rotation are formed. Have
When gripping the old main rope to be replaced, the first groove of the second gripping plate is opposed to the groove of the first gripping plate, and the old main rope is sandwiched between the grooves to grip. Then, when gripping a new main rope to be replaced, the second gripping plate is rotated so that the second concave groove faces the concave groove of the first gripping plate, and the new main rope is interposed between the concave grooves. It is characterized by being sandwiched and gripped.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a new main rope is sandwiched between the second holding plate with the second groove facing the groove of the first holding plate. When wearing, a spacer is provided which keeps a constant gap width between the first gripping plate and the second gripping plate and regulates a tightening pressure on the new main rope.

[0017] The invention described in claim 6 is the first or second invention.
The invention according to the third, fourth and fifth aspects is characterized in that the first and second gripping plates are made of any one of stainless steel, steel, aluminum alloy and urethane resin.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numerals 30 shown in FIGS. 1 to 3 denote guide rails for counterweights provided in the hoistway.
Is attached. These brackets 31 are shown in FIG.
As shown in the figure, the guide rail 30 is attached via a rail clip 32 to the rear side.

Each rail clip 32 is connected to a bracket 31 and a guide rail 30 via bolts 33 and nuts 34.
It is attached between. A long hole 31 a for position adjustment is formed in the bracket 31, the bolt 33 is inserted into the long hole 31 a, and the bracket 31 is fixed to a predetermined position of the guide rail 30 by tightening with a nut 34.

A support beam 37 having a U-shaped cross section is horizontally installed between the brackets 31. The support beam 37 is
It is fixed to the bracket 31 via the nut 8 and the nut 39.

On the side surface of the support beam 37, gripping mechanisms 43 of the same structure for gripping the main ropes are provided in parallel along the longitudinal direction of the support beams 37 by the number corresponding to the number of the main ropes.

As shown in FIGS. 4 and 5, each gripping mechanism 43 includes a pair of first and second gripping plates 4 respectively.
The holding plates 41 and 42 are formed of a metal material such as stainless steel, steel, or aluminum alloy, or a resin material such as urethane resin.

The first holding plate 41 is fixed to the side surface of the support beam 37 via a bolt 44. Screw holes 45 are formed at four corners of the first holding plate 41, respectively.
In addition, a concave groove 46 having, for example, a V-shaped cross section is formed in the middle portion of the front surface of the gripping plate 41 and extends in the up-down direction.

The second holding plate 42 is attached to the supporting beam 37 via a relatively long supporting bolt 47 as a supporting shaft so as to face the first holding plate 41. A support bolt 47 as a support shaft is attached to the center of the second holding plate 42, and the support bolt 47 rotatably and axially move through a through hole 48 formed in a side surface of the support beam 37. A double nut 49 is attached to the end that penetrates and projects inside the support beam 37 as a retaining means. The head 47a of the bolt 47 and the second gripping plate 4
2, a spring washer 50 is provided.

The second gripping plate 42 has a first pressing portion 42a on one side and a second pressing portion 42b on the other side of the area where the support bolt 47 is attached. The screw holes 4 in the first holding plate 41 are formed at the four corners of each of the pressing portions 42a and 42b.
5 is inserted with a fastening bolt 51 which can be screwed.

Each fastening bolt 51 is inserted from the front side of the second gripping plate 42, and a washer 52 is attached to a shaft portion on the insertion end side as a retaining means.

Each pressing portion 42 on the second gripping plate 42
Projections 53 are integrally formed in the middle portions of the inner surfaces of the projections 53a, 42b, respectively.
b is formed. The grooves 53a and 53b can face the grooves 46 of the first holding plate 41 in accordance with the rotation of the second holding plate 42.

On the inner surface of the second pressing portion 42b of the second gripping plate 42, spacers 54 having a constant thickness are attached on both sides separating the convex portion 53, respectively.

Next, a procedure for using the rope gripping device will be described. When replacing the main rope, as described above, raise the car to the top of the hoistway, support the car using a chain block, etc., and support the counterweight via the beam member installed in the pit, At the same level of the car and the bracket, the bracket 3 is attached to the guide rail 30 for the counterweight.
Attach 1. Then, the support beam 37 to which each of the gripping mechanisms 43 is previously attached is bridged between the brackets 31 and fixed.

Next, as shown in FIGS. 5A and 6, between the first holding plate 41 of the one holding mechanism 43 and the first pressing portion 42 a of the second holding plate 42. Pull in one of the old main ropes 4 to be replaced. At this time, each fastening bolt 51a is removed from the screw hole 45, and the second gripping plate 42 is moved in the axial direction integrally with the bolt 47 so that the first gripping plate 41 and the second gripping plate 42 are moved.
There is a sufficient space between the main rope 4 and the main rope 4 to allow the main rope 4 to be pulled in.

After the main rope 4 is drawn in between the first gripping plate 41 and the second gripping plate 42, each of the fastening bolts 51a is screwed into the screw hole 45 and uniformly tightened. The main ropes 4 are clamped and fixed by the concave grooves 46 and 53a between the gripping plate 41 and the second gripping plate 42.

Although the old main rope 4 used for many years has a small diameter, there is no member between the first holding plate 41 and the second holding plate 42 for restricting the tightening. Therefore, the double concave groove 4 is formed by the fastening bolt 51a.
The main rope 4 between the 6, 53a can be sufficiently fastened and firmly fixed.

Since the supporting beams 37 are provided with the gripping mechanisms 43 by the number corresponding to the number of the main ropes 4, the remaining main ropes 4 are also held and gripped by the corresponding gripping mechanisms 43 in the same procedure. Fix it.

Then, each main rope 4 is cut just above the gripping mechanism 43, and the replacement of the old main rope 4 with the new main rope 4a proceeds. Then, when it becomes necessary to grip the new main rope 4a with each gripping mechanism 43 during the replacement work, first, the fastening bolt 51a is loosened from the state shown in FIG.

Next, the second holding plate 42 is rotated by 180 ° about the bolt 47, and as shown in FIG. 5B, the second pressing portion 42b of the second holding plate 42 is moved to the first position. It is made to face the holding plate 41.

Then, one new main rope 4a is drawn in between the second pressing portion 42b of the second gripping plate 42 and the first gripping plate 41. At this time, the second holding plate 42
Is moved integrally with the bolt 47 in the axial direction so that a space is provided between the bolt 47 and the first gripping plate 41 so that the main rope 4a can be pulled in.

The first holding plate 41 and the second holding plate 4
After the main rope 4a is pulled in between the first and second gripping plates 41, the fastening bolts 51b are screwed into the screw holes 45 and evenly tightened to form the concave grooves 46, 51 between the first gripping plate 41 and the second gripping plate 42. The main rope 4a is pinched and gripped and fixed by 53b.

At this time, a spacer 54 is attached to the inner surface of the second pressing portion 42b of the second holding plate 42,
Therefore, when the second gripping plate 42 approaches the first gripping plate 41 in response to the tightening of the fastening bolts 51b and the interval between them shrinks to a certain value, the spacer 54 is moved to the first gripping plate 4.
1, the tightening of the main rope 4a is restricted.

The diameter of the new main rope 4a is larger than that of the old main rope 4. Therefore, when the new main rope 4a is tightened and clamped under the same conditions as the old main rope 4, the tightening pressure becomes excessive, and crushing or damage is caused. However, when the new main rope 4a is gripped as described above, the tightening pressure of the new main rope 4a is properly regulated by the spacer 54, and thus the quality of the new main rope 4a is deteriorated. There is no fear.

Incidentally, the first holding plate 41 is
The second gripping plate 42 is supported by support bolts 47 and the support bolts 4.
7 cannot be detached from the support beam 37 by a double nut 49 as a retaining means, and each fastening bolt 51a, 51b cannot be detached from the second grip plate 42 by a washer 52 for retaining. Therefore, these parts (the first holding plate 41, the second holding plate 42, the support bolt 47, the fastening bolts 51a, 51) are used when the main wires 4 and 4a are gripped or released.
Since there is no danger of dropping b), and since the respective parts are preliminarily assembled so as not to be detached, the work of gripping and releasing the main wires 4 and 4a can be easily and efficiently performed.

A gripping plate 4 for gripping the main ropes 4, 4a
Since the reference numerals 1 and 42 are formed of a metal material such as stainless steel, steel, and aluminum alloy, or a resin material such as urethane resin, the main ropes 4 and 4a can be stably gripped.

In the above embodiment, the concave grooves 45, 53a, 53b formed in the gripping plates 41, 42 are V-shaped grooves. However, the grooves have an undercut shape or a shape corresponding to the main rope strand. May be used.

[0044]

As described above, according to the present invention,
The main rope can be easily and efficiently tightened and gripped, and there is no danger of inadvertently dropping the tightening parts, so that the main rope can be safely replaced.

Further, when the old and new main ropes are tightened and gripped, the old and new main ropes can be tightened together with appropriate pressure to prevent the shift movement and damage.

[Brief description of the drawings]

FIG. 1 is a front view showing a rope gripping device according to an embodiment of the present invention.

FIG. 2 is a plan view of the rope gripping device.

FIG. 3 is a side view of the rope gripping device.

FIG. 4 is an enlarged plan view showing one gripping mechanism of the rope gripping device.

FIG. 5 is a front view of the gripping mechanism.

FIG. 6 is a side view showing a situation when an elevator main rope is replaced.

FIG. 7 is a perspective view showing the structure of a conventional rope gripping device.

[Explanation of symbols]

 4, 4a: Main rope 30: Guide rail 37: Support beam 41: First holding plate 42: Second holding plate 43: Holding mechanism 44: Bolt 45: Screw hole 46: Depressed groove 47: Support bolt (support shaft) 49) Double nuts (retaining means) 51a, 51b Fastening bolts 53a, 53b Grooves 54 Spacers

Claims (6)

[Claims] 1. A rope gripping device for gripping and fixing a main rope in an elevator hoistway when an elevator main rope is replaced, comprising: a support beam provided in the hoistway; A first gripping plate, a second gripping plate movably attached to the support beam via a support shaft in a direction of coming and going with respect to the first gripping plate, and a first gripping plate and a second gripping plate. 2, a plurality of screw holes formed in the first holding plate, and a plurality of screw holes which can be screwed into the screw holes inserted in the second holding plate. A fastening bolt, wherein the groove of the first gripping plate and the groove of the second gripping plate are opposed to each other, and a main rope is disposed between the two grooves. Screwed into Rope gripping apparatus characterized by gripping and sandwiched the main rope between the first grooves and the grooves of the second gripping plate of the gripping plate. 2. The rope gripping device according to claim 1, wherein the fastening bolt is provided with a retaining means for the second gripping plate. 3. The rope gripping device according to claim 1, wherein the support shaft is provided with a retaining means for the support beam. 4. A first and second groove which is rotatably supported via a support shaft and which can face a groove of the first grip plate in accordance with the rotation. When gripping the old main rope to be replaced, the first groove of the second gripping plate is opposed to the groove of the first gripping plate, and the old main rope is sandwiched between the grooves. When gripping a new main rope to be worn, gripped, and replaced, the second gripping plate is rotated so that the second groove faces the groove of the first gripping plate, and a new groove is formed between the grooves. The rope gripping device according to claim 1, 2 or 3, wherein the main rope is gripped by being pinched. 5. A second gripping plate, wherein a second groove is opposed to a groove of the first gripping plate, and a new main rope is clamped between the first gripping plate and the second gripping plate. 5. The rope gripping device according to claim 4, further comprising a spacer that regulates a gap width with respect to the gripping plate and regulates a tightening pressure on the new main rope. 6. A method according to claim 1, wherein said first and second holding plates are made of any one of stainless steel, steel, aluminum alloy, and urethane resin. The rope gripping device according to 4 or 5.