JPH0769558A - Hydraulic elevator - Google Patents

Abstract

PURPOSE:To provide a hydraulic elevator having the capability of restraining the vertical behavior of a car at the time of stopping at an elevator hall, without any influence due to the fluctuation of a load in elevator door open state. CONSTITUTION:A car 1 vertically travels in an elevator shaft 2, guided by the plunger 9 of a hydraulic device 7 along guide rails 3 and 3. The ceiling of the car 1 is fitted with a drive device 18 operating on a car door opening signal. Also, the ceiling 5 and floor 4 of the car 1 are provided with a pair of brake devices 13 and 13 having plungers capable of advancing to and retreating from the sides of the guide rails 3 and 3. In this case, the plungers of the drive devices 13 and 13 advance due to power from the drive device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic elevator suitable for moving passengers in and out of a car.

[0002]

2. Description of the Related Art Generally, in a hydraulic elevator, a car is designed to move up and down a hoistway by being guided by a guide rail by a hydraulic device. The hydraulic device is composed of a cylinder and a plunger that can be vertically expanded and contracted with respect to the cylinder, and the plunger is extended by supplying hydraulic oil into the cylinder.

[0003]

As described above, since the hydraulic elevator uses the hydraulic oil for expanding and contracting the plunger, the hydraulic oil in the cylinder or in the pipe passage has a compressive action due to, for example, the load, and is a kind of hydraulic oil. Since it works as a spring, the following adverse effects occur. That is, when a load is loaded, the car moves up and down like a fluffy jump.

In a hydraulic elevator using a rope as a hydraulic device such as an indirect type, since the extension of the rope and the deflection of a spring provided in the rope hitch are integrated, the vertical movement of the car is more and more large. Will be things.

This phenomenon is magnified due to the adverse effects of the amount of hydraulic oil and the length of the rope as the loading load increases and the elevator stroke increases. Such a fluffy jumping up-and-down behavior gives anxiety to the side (passenger) who uses the hydraulic elevator.

[0006] Therefore, an object of the present invention is to provide a hydraulic elevator capable of suppressing the vertical movement of a car without being influenced by the load variation in the car door open state when the car is stopped on the floor. It is in.

[0007]

In order to achieve the above-mentioned object, the present invention provides a hydraulic elevator in which a car moves up and down guided by a guide rail by a hydraulic system composed of a cylinder and a vertically movable plunger. In the car,
A drive device that operates with an open signal of the car door, and an operation that allows it to move forward with the power from this drive device to press the guide rail, and to move backward and forward when the power is cut off from the drive device so as to move backward and away from the guide rail The configuration is such that a braking device having a body is provided.

[0008]

[Operation] The car moves up and down while being guided by the guide rail due to expansion and contraction of the plunger. In addition, when the car stops at the stop floor, the drive device is activated by the car door open signal, and the motive power of this braking force presses the guide rail strongly with this power. The state fixed to the guide rail can be obtained. As a result, it is possible to suppress the fluffy jump-like vertical movement of the car without being affected by the change in the load when the car is stopped.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
In the figure, 1 is a car, and the car 1 moves up and down in the hoistway 2 by a plunger described later. In the hoistway 2, a pair of guide rails 3 and 3 facing each other in the up-down direction are provided, and the car 1 has guide rails 3 and 4 at four positions, namely, a lower car floor 4 and an upper car ceiling 5. Three
A guide plate 6 is provided along which the guide plate 6 can slide. A vertical movement of the car 1 is controlled by a hydraulic device 7.

The hydraulic device 7 is composed of a cylinder 8 fixedly supported on the bottom of the hoistway 2 and a plunger 9 which is vertically expandable and contractable with respect to the cylinder 8. Plunger 9 is connected from power unit 11 equipped with control valve 10 to pipe 12
The hydraulic oil is supplied to the inside of the cylinder 8 through the cylinder to expand upward, and the hydraulic oil is discharged from the cylinder 8 to a tank (not shown) to be reduced.

A control valve 10 provided in the power unit 11
Is a call button switch (not shown) provided on each floor
Switching control is performed by a signal from, which enables expansion / contraction control of the plunger 9.

Further, a car floor 4 and a car ceiling 5 of the car 1
Is provided with a pair of braking devices 13, 13 each having a plunger that can move forward and backward with respect to the side surfaces of the guide rails 3, 3. As shown in FIG. 2, the braking device 13 includes a casing 14, a plunger 15 supported by the casing 14 so as to be able to move forward and backward, and a plunger 15 supported so as to form a slight clearance α with the guide rail 3 when not in operation. Plunger
It is composed of a return spring 16 that returns 15 to its original position. The casing 14 is fixed to the car ceiling 5 of the car 1 and is connected via a pipe 17 to an electromagnetic switching valve of a drive device 18 which will be described later.

The drive unit 18 includes an electromagnetic switching valve 19 and a pump 20.
And a safety valve 21 is a hydraulic circuit. The electromagnetic switching valve 19 and the pump 20 are activated when a stop signal of the car 1 is input, and are switched to an operation stopped state by shutting off the opening signal of the car door.
Spool 19a of FIG. 3 moves to the left in FIG.
The hydraulic oil is supplied into each casing 14 from. Further, when the electromagnetic switching valve 19 is in the neutral state, the ports P on the input side and the output side are in a state of always communicating with the tank T.

The safety valve 21 is a pump 20 and an electromagnetic switching valve.
It is a normal relief valve that is provided in the circuit between 19 and 19 and functions to release the pressure to the tank T when the pressure in the circuit becomes a certain value or more.

Next, the operation of the embodiment configured as described above will be described. When hydraulic oil is supplied to and discharged from the power unit 11 to the cylinder 8 and the plunger 9 is expanded and contracted, the car 1 is guided by the guide rail 3 to move up and down in the hoistway 2.
Next, when the car 1 stops at the stop floor, the electromagnetic switching valve 19 and the pump 20 are activated by the opening signal of the car door at that time, the hydraulic oil is supplied from the pump 20 into each casing 14, and the plunger 15 Moves forward and strongly presses the guide rail 3. The car 1 is fixed to the guide rail 3 by the frictional force due to the pressing.

Therefore, according to the embodiment configured as described above, when the rider 1 stops at the stop floor, the fluffy jumping vertical movement can be performed without being affected by the load such as the load. Since it is suppressed, it is possible to provide a hydraulic elevator that does not cause anxiety to passengers.

In the above description, the braking device 13
Is a hydraulic type that is controlled by the hydraulic oil from the drive device 18, but any type of pneumatic type that controls using air, electric type that electrically controls, mechanical type that mechanically controls Good. Further, although the braking body and the drive device are separate bodies, they may be integrated.

Further, as a braking device, as shown in FIG. 4, a sliding body 22 is provided at the end of the plunger 15 so that the sliding body 22 is brought into strong contact with the guide rail 3 when the car 1 stops at the stop floor. With this, an even greater frictional force can be obtained.

[0019]

As described above, according to the present invention, in a hydraulic elevator in which a car moves up and down guided by a guide rail by a hydraulic system including a cylinder and a plunger that can move up and down, a car, a car, and a car. A braking device having a driving device that operates by a door open signal and an actuating body that moves forward with the power from the driving device to press the guide rail and move backward and backward so as to be separated from the guide rail when the power is shut off. Since the vehicle is provided, it is possible to provide the hydraulic elevator in which the vertical movement of the car is suppressed without being affected by the load variation in the car door open state when the car stops on the floor.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a sectional view of a braking device used in an embodiment of the present invention.

FIG. 3 is a circuit diagram of a driving device used in an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part of a braking device different from the braking device shown in FIG.

[Explanation of symbols]

1 ... Car, 3 ... Guide rail, 7 ... Hydraulic system, 8 ...
Cylinder, 9, 15 ... Plunger, 11 ... Power unit,
13 ... Braking device, 14 ... Casing, 18 ... Driving device, 19 ... Electromagnetic switching valve.

Claims (3)

[Claims] 1. A hydraulic elevator in which a car moves up and down while being guided by a guide rail by a hydraulic device composed of a cylinder and a plunger that can move up and down, and a drive device that operates on the car by an open signal of a car door. And a braking device having an actuating member that can move forward and backward by the power from the drive device to press the guide rail and move backward and backward so as to be separated from the guide rail when the power is cut off. Hydraulic elevator to. 2. The hydraulic elevator according to claim 1, wherein the braking device comprises a casing, a plunger supported by the casing so as to be movable back and forth, and a return spring for returning the plunger. 3. The braking device comprises a casing, a plunger supported by the casing so as to be able to move forward and backward, a sliding body provided at the tip of the plunger, and a return spring for returning the plunger. The hydraulic elevator according to claim 1.