JPH0466489A - Extension device for oblique elevator tall cord - Google Patents

Abstract

PURPOSE:To relax tensile or compressive stress caused at a U-shaped suspended portion of a flat tail cord by providing a tail cord tension device at supporting portions on a cage and elevator path sides so as to freely change the tension of a tension rope. CONSTITUTION:A flat tail cord 9 containing a tension rope suspended in a U-shape is travelled along a receiving roller within an elevator path while being usually extended downwardly by a pulley 12. In the U-shaped suspended portion, there occur a tensile stress 21 on the upper portion abuted on the groove of the pulley 12 and the compressive stress on the lower portion. When the cord 9 is wound around the pulley in a tail cord tension device on the cage side, the tension rope on the upper and lower portions yields the tensile stress 21 and the compressive stress 22, respectively. Thus, a tension rod 18a is drawn downwardly and a tension rod 18b is pushed upwardly, so that a tension coil spring 17a is compressed and a tension coil spring 17 is extended. With this action, the outside of the cord 9 is extended, and the inside thereof is contracted, an therefore, the generated stress can be relaxed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tensioning device for a flat tail cord for a skew elevator.

[Conventional technology]

In the conventional tail cord tension device for a skew elevator, as described in Technical Report No. 87-1585, the tail cord is suspended in a U parallel to the hoistway, and the bent portion that becomes the U portion is attached to the pulley portion of the tension device. Parallel and inclined rollers with flanges for guiding the tail cord.

It was installed vertically and in each direction, and had a structure that supported the tail cord.

[Problem to be solved by the invention]

The above conventional technology takes into consideration the fact that tensile stress and compressive stress are generated on the upper and lower sides of the flat tail cord, respectively, at the bent portion of the U-hanging part of the flat tail cord, which causes twisting of the electric wire inside the tail cord. There was a risk that the electric wire inside the tail cord would break.

An object of the present invention is to extend the life of the flat tail cord by alleviating the tensile and compressive stresses generated in the U-hanging portion and preventing twisting and disconnection of the electric wires inside the tail cord.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a tail cord tensioning device on the car side and hoistway side support parts of the flat tail cord, so that the tension of the tension rope that receives the tension of the flat tail cord can be freely changed. As a result, the tensile and compressive stress generated in the U hanging portion of the flat tail cord was alleviated.

[Effect]

The tail cord tensioning device has an elastic body that can freely change the tension of the tension rope that receives the tension of the flat tail cord.In response to the tensile and compressive stress generated in the six flat tail cords, this elastic body responds to the opposite compression stress. , generating tensile stress. As a result, the stress generated in the flat tail cord is alleviated, and the wire can be moved in and out of the pulley groove of the tension device without difficulty, thereby preventing the electric wires inside the flat tail cord from twisting and breaking, thereby extending the life of the cord.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Fig. 2 is a cross-sectional view of the hoistway of a diagonal elevator, Fig. 1 is a plan view of a flat tail cord tensioning device with a tension rope on the car side, Fig. 3 is a plan view schematically showing the car and tail cord, and Fig. 4 is FIG. 5 is a cross-sectional view taken along the line V-■ in FIG. 4, showing the flat tail cord in a U-hung state.

In FIG. 2, the heel 1 of the oblique elevator is connected by a rope 3 to a weight 2 passing under it, and is driven by a hoist 4. Car 1 and weight 2 are respectively roller 5,
6 and runs on rails 7.8 installed along the slope. On the other hand, the tail cord 9 for power supply from the elevator machine room (not shown) to the car is shown in FIGS.
As shown in the figure, a tail cord for supporting the car is attached to the car 1 at the other end via a pulley 12, which is supported by a tail cord tensioning device 10 for intermediate support provided in the hoistway, and is movable up and down along the slope. It is fixed with a cord tensioning device 11 and wired to electrical equipment (not shown) around the car. The pulley 12 is supported by support rollers 13 and runs on a guide rail 14. Also.

In order to move the tail cord 9 in and out of the pulley 12, guide rollers 19A, 19B, and 19G with flanges are provided to raise the tail cord 9 from a horizontal state to a vertical state.

The structure corresponds to the groove of pulley]-2. This pulley 12
The upper part of a guide rail 14 provided in the gap between the basket 1 and the weight 2 is moved up and down at 1/2 of the motion of the basket 1.

As shown in FIG. 3, the U-suspended flat tail cord 9 with a tension rope is always pulled downward by the pulley 12 while running on the rollers 15 in the hoistway. As shown in FIG. 4, when the tension rope-containing flat tail cord 9 is in a natural U-hanging state without the pulley 12, the bent portion thereof is tilted inward. During actual lifting, the tension rope-containing flat tail cord 9 is constantly pulled downward by the pulley 12, and the upper side of the portion that touches the pulley groove of the U-hanging portion has a tensile stress of 21. Compressive stress 22 occurs on the lower side.

In the tail cord tensioning device 11 on the car 1 side, when the flat tail cord 9 with tension rope is wound around the pulley 12, the tension rope 16a on the upper side of the flat tail cord 9 with tension rope has a tensile force of 2.
] -6b on the lower side produces a compressive force 22. As a result, the tension rod 18a is pulled down and the tension rod 18b is pushed up, so that the tension coil spring 17a is compressed and the tension coil spring 17b is stretched. Due to these operations, the outside of the tension rope-containing flat tail cord 9 is stretched and the inside is contracted, so that the generated stress is alleviated.

According to this embodiment, the stress generated when the flat tail cord 9 containing tension rope is wound around the pulley 12 is alleviated, and the flat tail cord 9 containing the tension rope hits the groove of the pulley 12 with an average force, so that the tension rope is inserted into the pulley 12. Twisting and disconnection of the electric wire 23 inside the flat tail cord 9 can be prevented and smooth operation can be obtained.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

By providing a tail cord tensioning device on the support part of the tail cord with tension rope, the stress generated in the tail cord with tension rope that is raised vertically from horizontal is alleviated, and the wire can be smoothly moved in and out of the pulley of the tension device. Since there is no twisting and there is no need to worry about cutting, the service life can be extended.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the tail cord tensioning device, Fig. 2 is a sectional view of the hoistway of the oblique elevator, Fig. 3 is a plan view of the car and tail cord, and Fig. 4 is a plan view of the tail cord in a U-hanging state. , FIG. 5 is a sectional view taken along the line ■-■ in FIG. 4. 1... Car, 2... Weight, 9... Tail cord, 10° 11... Flat tail cord tensioning device with tension lobe, 12... Pulley, 14... Guide rail, 15...・The receivers are rollers, 17a, 17b...
Tension coil spring, 19A-C...Roller with collar,
2o... Uke No. 2 0 Inventor Kanwa No. □22 Keinai Ibaraki funeral map

Claims (1)

[Claims] 1. One end is fixed to a car that goes up and down in an inclined hoistway,
A tail cord tension device with a pulley is provided on the U-shaped portion of a flat control tail cord whose other end is fixed to a part of the hoistway, and an elastic body for the tension device is provided on the support portion of the tail cord. A tensioning device for a diagonal elevator tail cord. 2. A tensioning device for a diagonal elevator tail cord according to claim 1, wherein the elastic body for the tail cord tensioning device is a coil spring.