JPH05186166A - Hydraulic elevator - Google Patents

Abstract

PURPOSE:To provide a very practical hydraulic elevator capable of restraining the wear of a guide device. CONSTITUTION:A hydraulic jack 13 is provided on the rear wall 11A side of an elevator shaft 11 for a lower beam 1 on which a cage 2 is placed and pulleys 9A, 9B located between the cage 2 and side walls 11B, 11C are attached to both ends of a connecting shaft 12 connected to the upper portion of the hydraulic jack 13 and the middle of a main rope 10A, 10B having one end fixed is engaged with the hydraulic jack 13 and the other end of the main rope 10A, 10B is connected to the lower beam 1 between the cage 2 and the side walls 11B, 11C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic elevator, and more particularly to improvement of an indirect drive type hydraulic elevator driven by a rope.

[0002]

2. Description of the Related Art Hydraulic elevators are roughly classified into, for example, as described in Japanese Utility Model Application Laid-Open No. 55-32341, a direct drive type for directly connecting a car to a plunger and ascending / descending, and a main type for expanding and contracting the plunger. There are two types: an indirect drive type that drives a rope to raise and lower the car. Compared to the former, the latter is superior in workability because it does not require the hydraulic jack to be buried in the ground, but on the other hand, the guide device that guides the car and the main rope that suspends the car are used. Since the suspension core does not coincide with the suspension core, an eccentric load due to a load moment corresponding to the fastening position of the main rope is applied to the guide device. Since this guide device uses urethane rubber, it is deformed by the unbalanced load described above and this greatly affects the riding comfort characteristics. It is necessary to replace it in a short cycle.

Therefore, in the prior art, Japanese Patent Laid-Open No. 61-127585
As shown in the publication, a hydraulic jack is provided on one side wall of the hoistway, and the side of the lower beam of the car facing the hydraulic jack is connected by a main rope, thereby canceling the unbalanced load applied to the guide device. Therefore, an indirect drive type hydraulic elevator has been proposed in which a counterweight for absorbing an unbalanced load is provided on the other side wall of the hoistway.

[0004]

Although the unbalanced load applied to the guide device is absorbed by the above-mentioned conventional structure, it is a unique structure in which the hydraulic jack is arranged on the side wall side of the hoistway and is generally adopted. As described above, the hydraulic jack cannot be applied to the configuration in which the hydraulic jack is arranged on the rear wall side of the hoistway. In other words, if the above-mentioned structure is adopted for the hydraulic elevator having the same structure, the counterweight for absorbing the unbalanced load is located on the door side of the car, and cannot actually be used as an elevator.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly realistic hydraulic elevator which can suppress the wear of the guide device.

[0006]

In order to achieve the above object, the present invention provides a guide system for a car by providing a hydraulic jack on the rear wall side of the hoistway and a car on the side opposite to the rear wall of the hydraulic jack. So as to travel along a guide rail fixed to the side wall of the hoistway, and the hydraulic jack is provided with a pair of pulleys located on the side of the side wall of the car and the pair of pulleys engaged with the pair of pulleys. One end of the two main ropes thus provided is connected to the lower beam of the car, and the other ends of the two main ropes are fixed.

[0007]

Since the hydraulic elevator according to the present invention has the above-mentioned structure, both pulleys are located between the car and the side walls, and the main rope engaged with both pulleys is connected to the lower beam. Can be arbitrarily changed in the direction of approaching and separating from the rear side. For example, you can increase the diameter of the pulley, or connect the main rope to the position of the lower beam that is offset from the conventional pulley to the rear wall side,
The rotation moment applied to the car can be reduced by that much, and the wear of the guide device can be suppressed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a hydraulic elevator according to an embodiment of the present invention. A hydraulic jack 13 including a hydraulic cylinder 7 and a plunger 8 is formed on the rear wall 11A side in a hoistway 11. The hydraulic jack 13 is configured to move the plunger 8 up and down under the control of a hydraulic control device (not shown). A pair of pulleys 9A and 9B are rotatably supported on the plunger 8 of the hydraulic jack 13 via a connecting shaft 12. In this respect, more specifically, as shown in FIG. 2, which is a plan view of FIG. 1, the connecting shaft 12 connected to the plunger 8 is formed substantially parallel to the rear wall 11A, and the pulley 9A connected to both ends in the axial direction thereof. , 9B is the hoistway 1
It is arranged between the side walls 11B and 11C of No. 1 and the car 2. The main rope 10 is attached to each of these pulleys 9A and 9B.
A and 10B are engaged, the main ropes 10A and 10B
One end of each of the main ropes 10A, 10A is fixed to an appropriate fixing portion such as the hydraulic cylinder 7 or the bottom of the hoistway 11.
The other end of B is connected to the lower beam 1. Therefore, when the hydraulic jack 13 operates, the lower beam 1 moves up and down via the main ropes 10A and 10B, and the car 2 mounted on the lower beam 1
Will move up and down.

Vertical beams 14A and 14B connected to the lower beam 1 are erected on the side of the car 2, and the vertical beams 14 are connected to each other.
Two sets of guide devices 4A and 4B each composed of a rotatable guide roller and the like are formed at the upper and lower ends of the A and 14B in the vertical direction. These guide devices 4A and 4B are provided with guide rails 3 fixed to the side walls 11B and 11C of the hoistway 11.
It engages with A and 3B and guides the raising and lowering of the car 2.

In the conventional hydraulic elevator, since the pulley is rotatably directly attached to the upper portion of the plunger 8 without the connecting shaft 12, the pulley can be arranged between the plunger 8 and the car 2 shown in FIG. Had to make a diameter. Therefore, the main rope engaged with the pulley must be connected to the end of the lower beam 1 on the rear wall 11A side, and a counterclockwise rotational moment is applied to the car 2 via the lower beam 1,
This is a guide device 4A engaged with the guide rails 3A, 3B,
I was in 4B.

However, in this embodiment, a connecting shaft 12 is provided as shown in FIG.
9B is attached so that both pulleys 9A and 9B are positioned between the car 2 and the side walls 11B and 11C.
The pulleys 9A, 9 regardless of the facing distance between the
The diameter of B can be selected. Therefore, if the pulleys 9A and 9B having large diameters are used as shown in the figure, the connection between the main ropes 10A and 10B and the lower beam 1 can be moved to the side opposite to the rear wall of the lower beam 1 as compared with the conventional one. The rotation moment applied to the car 2 can be reduced by the amount corresponding to the minutes. For this reason, the eccentric load applied to the guide devices 4A and 4B is reduced, and the consumption thereof can be suppressed. Further, since the pulleys 9A, 9B are located between the car 2 and the side walls 11B, 11C, the connecting positions of the main ropes 10A, 10B and the lower beam 1 are from the pulleys 9A, 9B to the main ropes 10A, 10B.
It is possible to shift B not only to the position where it hangs, but also to the side opposite to the rear wall as shown by the dotted line in FIG. Therefore, the pulley 9
It is possible to reduce the rotation moment applied to the car 2 regardless of the sizes of A and 9B, and to suppress the wear of the guide devices 4A and 4B. Moreover, since the hydraulic jack 13 is arranged on the rear wall 11A side of the car 2, it is a general configuration.
You get a realistic hydraulic elevator.

[0012]

As described above, according to the present invention, the hydraulic jack is provided with the connecting rod substantially parallel to the rear wall, and the pulleys provided at both ends of the connecting rod are located between the car and the side walls. In a typical hydraulic elevator configuration, it is possible to adjust the connection position between the main rope and the lower beam, reduce the rotational moment applied to the guide device, and suppress wear.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic elevator according to an embodiment of the present invention.

2 is a plan view of the hydraulic elevator shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Lower beam 2 Car 3A, 3B Guide rail 4A, 4B Guide device 9A, 9B Pulley 10A, 10B Main rope 11A Rear wall 11B, 11C Side wall 12 Connecting shaft

Claims (1)

[Claims] 1. A main rope having a hydraulic jack on the rear wall side of the hoistway and a car on the side opposite the rear wall of the hydraulic jack, one end of which is fastened to the lower beam of the car and the other end of which is fixed. In a hydraulic elevator configured to engage the hydraulic jack and run the car along a guide rail fixed to a side wall of the hoistway by a guide device. A pair of pulleys is provided so as to be located between the side wall and the car, and the one ends of the two main ropes provided by engaging with the pair of pulleys are connected to the lower beam, respectively. And hydraulic elevator.