JPH0348114B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an indirect cantilever type hydraulic elevator that raises and lowers a car using a hydraulic jack, and in particular reduces unbalanced loads on the mechanism that guides and directs the car. It is something to do.

[Conventional technology]

Conventionally, as an indirect type cantilever type hydraulic elevator equipped with a hydraulic jack on the side of a car, there has been provided, for example, one shown in Japanese Patent Publication No. 50-6945.

FIGS. 3 and 4 are for explaining such a conventional hydraulic elevator system, in which 1 is a hoistway, 2 is an elevator car, 3 is a hydraulic jack that expands and contracts in the direction of elevation of the car 2, 4 is a main rope for hanging the car 2; 5 is a fork-type hanging frame to which one end of the main rope 4 is connected to hold the car 2; 6 is attached to the upper end of the plunger 3a of the hydraulic jack 3; rope 4
7 is a guide rail that guides the car 2 including the suspension frame 5 and the diversion car 6 in the vertical direction; 8 is a guide roller that rolls along the guide rail 7, It is attached to frame 5. 9 is the center of gravity position of the car 2.

In the conventional indirect cantilever type hydraulic elevator configured as described above, the car 2 is suspended by the main rope 4 wrapped around the deflection wheel 6 at the upper end of the hydraulic jack 3, and the car 2 is lifted. The operation is performed by sending pressure oil generated by a hydraulic power unit (not shown) to the hydraulic jack 3, and during descending operation, the weight of the car 2 and the plunger causes the oil in the hydraulic jack 3 to be pumped through a control check valve or the like into the oil tank ( (not shown). And car 2
is guided vertically within the hoistway 1 by guide rails 7 and guide rollers 8.

[Problem that the invention seeks to solve]

As described above, in the conventional indirect cantilever type hydraulic elevator, the center of gravity 9 of the car 2 is far from the suspension point of the suspension frame 5 to which the main rope 4 is connected, and the suspension frame 5 of the car 2 Since it is in a cantilevered state, the upper and lower guide rollers 8 are always pressed against the guide rail 7, and an unbalanced load is applied to the guide rail. Therefore, when the car 2 becomes larger or its own weight becomes heavier, the unbalanced load force acting on the guide rail increases, and as a result, due to the system configuration, the guide rail, guide rollers, hanging frame, etc. Each device had to be ranked up, and there was also the problem of restrictions on car size or additional specifications.

This invention was made to solve the above-mentioned problems, and provides an indirect cantilever type hydraulic elevator that can reduce the unbalanced load acting on the guide rail and eliminates the need to upgrade each piece of equipment. It is intended to.

[Means for solving problems]

In the hydraulic elevator according to the present invention, the end of a counterweight rope is connected to the car on the opposite side of the main rope, in which the car is combined with a hydraulic jack in a cantilevered manner.

[Effect]

In this invention, the counterweight imparts lift to the opposite side of the car, thereby achieving the above-mentioned objective.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIGS. 1 and 2, the same or equivalent parts as in FIGS. 3 and 4 are given the same reference numerals, and the explanation thereof will be omitted, and the parts different from the conventional ones will be mainly described.

That is, as is clear from FIGS. 1 and 2, the main rope 4 is attached to the car 2 on the opposite side of the fixed side.
A rope pitch portion 10 is provided to give lift to this. The installation position of this bit part 10 is a line L2 that is perpendicular to the line L1 connecting the hanging point 5a of the main rope 4 and the center of gravity position 9 of the car 2 on a plane at the center of gravity position 9, as shown in FIG. Car 2 on the opposite side of the suspension point 5a with L2 as the axis
at any position.

Reference numeral 11 denotes a counterweight for the car 2, and the counterweight 11 and the rope pitch portion 10 are connected by a rope 12 on the counterweight side.
2 is wrapped around a guide wheel 13 provided on the ceiling of the hoistway 1. 14 is a guide rail for a counterweight arranged in the vertical direction within the hoistway 1.

In the indirect cantilever type hydraulic elevator of this embodiment configured as described above, the car 2
By connecting the rope 12 of the counterweight 11 to the anti-support side of the car 2 via the rope hit part 10, a lifting force corresponding to the weight of the counterweight 11 is applied to the anti-support side of the car 2. As a result, the amount of unbalanced load acting on the guide rail 7 via the guide rollers 8 is reduced, and the weight of the car 2 is reduced by the counterweight 11, so that the hydraulic power unit that constitutes the drive mechanism of the hydraulic elevator The load on each device is reduced, making it cheaper, and there are no restrictions on car size or additional specifications.

Note that the location where the rope hit portion 10 is provided is preferably under the conditions shown in FIG. 2, but is not limited to this, in short, as long as the uneven load applied to the guide rail 7 can be reduced. good.

〔Effect of the invention〕

As described above, according to the present invention, the rope end of the counterweight is connected to the car on the opposite side to the fixed side of the main rope that combines the car with the hydraulic jack in a cantilevered manner, so that the car is not supported. Since it is designed to apply lift force to the side, it is possible to reduce the unbalanced load applied to the guide rail on the support side of the car, and even if the car becomes larger or its own weight becomes heavier, each part of the hydraulic power unit etc. There is no need to clamp up the equipment.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional plan view showing an embodiment of an indirect cantilever type hydraulic elevator according to the present invention;
FIG. 2 is a longitudinal sectional front view thereof, FIG. 3 is a transverse plan view of a conventional indirect type cantilever type hydraulic elevator, and FIG. 4 is a longitudinal sectional front view thereof. 1... Hoistway, 2... Car, 3... Hydraulic jack, 4... Main rope, 5... Hanging frame, 7...
... Guide rail, 9 ... Center of gravity position of the car, 10
... Rope hitch section, 11 ... Counterweight, 12
... Rope on the counterweight side, 13 ... Guide car. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A car that goes up and down in the hoistway, a hydraulic jack arranged in the hoistway that expands and contracts in the lifting direction of the car, and a hydraulic jack that cantilever the car and apply hydraulic pressure to the car. In a hydraulic elevator equipped with a main rope that indirectly transmits the expansion and contraction of the jack, a counterweight that ascends and descends in the hoistway is provided, and a rope end of the counterweight is connected to the main rope that is connected to the car. A hydraulic elevator, characterized in that it is connected to the car on a side opposite to the fixed side of the car.