JPH10236749A - Rope hitch mechanism for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of a difference between twist strengths of a rope suspending a car in accordance with its upward/downward position. SOLUTION: A device comprises a hitch plate 9 provided in a cross head channel of a car frame, insert hole 10 formed in this hitch plate 9, shackle rod 11 inserted to this insert hole 10 to lock mount an end part of a rope 7, and a thrust bearing 16 interposed between this shackle rod 11 and the hitch plate 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope hitch mechanism for maintaining a constant torsional strength of a rope hanging a car of an elevator.

[0002]

2. Description of the Related Art As a conventional hoisting elevator,
For example, there is one as shown in FIG. In the figure, a car 101 and a counterweight 103 are vertically movably arranged on a hoistway 102 of an elevator. A rope 104 is attached to the car 101 and the counterweight 103, and the rope 104 is hung on a drive sheave 105 and a baffle sheave 106 of the hoist.

[0003] As shown in FIG. 4, one end of a rope 104 hung on a drive sheave 105 is connected to a pair of C-shaped steel 107.
a and 107b are fixed to a hitch plate 108 provided in the crosshead channel 107. The number of ropes 104 is three or more.
Is obtained by combining a number of thin strands into a strand, and further combining these 3 to 9 strands. For this reason, since one rope 104 is formed by twisting a large number of strands, it has a constant torsional strength.

[0004]

However, the rope 104 fixed to the crosshead channel 107 of such a car frame is hung on the drive sheave 105. When approaching, the twist of the rope 104 between the car 101 and the drive sheave 105 is collected in a short time between the car 101 and the drive sheave 105, and the torsional strength of the rope 104 increases. On the other hand, when the car 101 descends and separates from the drive sheave 105, the car 101 and the drive sheave 1
The torsional strength during 05 becomes low and becomes the original constant strength. As described above, when the torsional strength of the rope 104 varies depending on the upper position and the lower position of the car 101,
There is a problem that the life of the rope 104 is shortened.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a difference in the torsional strength of a rope that suspends a car depending on the upper position and the lower position of the car.

[0006]

According to the present invention, a hitch plate provided in a crosshead channel of a car frame and an insertion hole formed in the hitch plate are provided. The shackle rod is inserted into the insertion hole and the end of the rope is fixed thereto, and a thrust bearing is interposed between the shackle rod and the hitch plate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2 are views showing an embodiment of a rope hitch mechanism of an elevator according to the present invention.

In FIG. 2, reference numeral 1 denotes an elevator car, which is composed of a car room 2 and a car frame 3. The car frame 3 includes a plank channel (not shown) located on the floor side of the car room 2, an upright channel 4 located on the side, a crosshead channel 5 located on the ceiling side, and the like. Roller guides (not shown) are provided at both upper and lower ends of the upright channel 4, and the roller guides are slidably engaged with guide rails (not shown) for guiding the car.

The car room 2 is supported by a car frame 3, and the car frame 3 is suspended via a rope hitch mechanism 8 on three ropes 7 hung on a drive sheave 6 of a hoisting machine. As described above, the rope 7 is formed by twisting 3 to 9 strands, and has a constant torsional strength.

The crosshead channel 5 is made of a pair of C-shaped steel materials, and a hitch plate 9 as shown in FIG. 1 is provided between the pair of C-shaped steel materials, and an insertion hole 10 is formed in the hitch plate 9. I have. A shackle rod 11 to which an end of the rope 7 is fixed is inserted into the insertion hole 10, and a double nut 12 is fastened to a tip (lower end) of the shackle rod 11.

A pair of upper and lower spring receivers 13 and 14 are vertically movably mounted on the shackle rod 11, and a compression spring 15 is contracted between the pair of spring receivers 13 and 14. A flat seat thrust bearing 16 is interposed between the spring receiver 14 and the hitch plate 9. For this reason,
The car 1 is hung on the rope 7 via the thrust bearing 16.

Although the rope 7 has a certain torsional strength, when the car 1 rises and is positioned above, the distance between the drive sheave 6 and the car 1 becomes short, and the torsional strength is reduced. There is a possibility that it will be collected by the rope 7 between the sheave 6 and the car 1 and become high. However, since the thrust bearing 16 is interposed between the rope 7 and the car 1, the rope 7 can rotate (return) about the axis. For this reason, the torsional strength of the rope 7 is prevented from becoming high, and a constant initial torsional strength can be maintained. Therefore, there is no difference in the torsional strength of the rope 7 depending on the upper position and the lower position of the car 1.

On the other hand, when the car 1 is positioned upward, the torsional strength of the rope 7 increases, and the rope 7 rotates around the axis on the drive sheave 6 in an attempt to return to the original torsional strength ( Back), and at this time, abnormal noise occurs. However, since the torsional strength of the rope 7 is prevented from increasing as described above, the abnormal noise does not occur.

[0014]

As described above, according to the present invention,
Since the thrust bearing is interposed between the hitch plate and the shackle rod, there is no difference in the torsional strength of the rope between the upper and lower positions of the car, and the life of the rope can be extended. In addition, even if the car is positioned above, the twisting strength of the rope does not increase, so that no abnormal noise is generated by the rope.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a rope hitch mechanism of an elevator.

FIG. 2 is a perspective view in which a rope is hanging a car.

FIG. 3 is a front view of a conventional elevator.

FIG. 4 is a perspective view of the rope hanging the basket.

[Explanation of symbols]

1 ... basket, 5 ... crosshead channel, 7 ... rope,
9 ... hitch plate, 10 ... insertion hole, 11 ... shackle rod, 16 ... thrust bearing.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Makoto Toriumi 2700-1, Miikeguchi, Koike-shi, Shibayama-cho, Sanmu-gun, Chiba Japan Otis Elevator Co., Ltd.

Claims (1)

[Claims] 1. A hitch plate provided in a crosshead channel of a car frame, an insertion hole formed in the hitch plate, a shackle rod inserted into the insertion hole and having an end of a rope fixed thereto. A rope hitch mechanism for an elevator, comprising: a thrust bearing interposed between a shackle rod and the hitch plate.