JPH1025067A - Operating device for hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the fouling of a cage despite the outflow of a leaked oil into an elevating path, by detecting the outflow outside of the leaked oil, from the oil pan of a ground part provided on a cylinder upper part, to avoidably operate the cage upward from the ground. SOLUTION: The outflow of a leaked oil from an oil pan 12, due to blinding, etc., of a piping 13 or a leaked oil recovery device, causes the outflow of the leaked oil into a tank 14. The outflow of the leaked oil into the tank 14 excites an evasion operation directing relay by the action of a detecting device 15 for detecting the outflow of oil in the tank 14, to give an evasion operation directive for moving a cage 17 upward from a ground 9, to escape the cage 17 upward. This prevents the exposure of the cage 17 to the leaked oil despite the outflow of the leaked oil from the oil pan 12, thereby preventing the fouling of the cage 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hydraulic elevator operating device.

[0002]

2. Description of the Related Art In general, in a hydraulic elevator, a car is raised and lowered by moving a plunger of a hydraulic jack up and down. A packing is used as a sealing material between a cylinder of the hydraulic jack and a plunger that reciprocates linearly. Have been. Then, in order to allow the plunger to move smoothly, it is necessary to cause a small amount of oil leakage from the packing such that a lubricating oil film is formed on the surface of the plunger.

Therefore, conventionally, Japanese Patent Application Laid-Open No. Sho 53-60053
As shown in the publication, a small amount of oil leakage is recovered from a cylinder head of a hydraulic jack to an oil tank of a hydraulic power unit provided in a machine room of an elevator by an oil leakage pipe via a pump.

[0004]

In the above-mentioned conventional apparatus, if a large amount of foreign matter such as dust is contained in the oil leakage from the plunger, the filter in the oil recovery apparatus is clogged, and the oil recovery is performed. The oil in the apparatus cannot be collected in the oil tank, and when oil leaks from the upper part of the plunger into the hoistway, if the car is below, the car is contaminated with oil.

An object of the present invention is to provide a hydraulic elevator operating device which does not contaminate a car even if oil leaks into a hoistway.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a hydraulic jack comprising a cylinder and a plunger in a hoistway,
In a hydraulic elevator operating device in which a car is moved up and down through a rope by raising and lowering the plunger, it is detected that oil leakage from an oil receiver of a gland provided at the upper part of the cylinder leaks out. This is achieved by providing a device and a means for causing the car to perform an avoidance operation above the ground when the detection device is operated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic longitudinal sectional view of a hydraulic elevator provided with an operating device according to an embodiment of the present invention, and FIG. 2 is an operation circuit diagram.

In FIG. 1, 1 is a hoistway, 2 is a hoistway 1
A hydraulic jack comprising a cylinder 3 erected through a cylinder table 7 provided on a pit floor 6 inside the pit and a plunger 4 which moves up and down by supply and discharge of oil into the cylinder 3. At the upper end, a pulley 5 is provided. Reference numeral 8 denotes a pipe provided in the cylinder 3 so that oil is supplied or discharged through the pipe 8. Reference numeral 9 denotes a gland provided at the upper end of the cylinder 3. The gland 9 incorporates a metal 10 for guiding the vertical movement of the plunger 4 and a packing 11 for keeping the cylinder 3 oiltight. An oil receiver 12 for receiving oil leaking from around the packing 11 when the plunger 4 moves up and down is provided at the tip of the plunger 4.
Reference numeral 13 denotes a pipe for guiding the oil in the oil receiver 12 to an oil leakage recovery device (not shown). Reference numeral 14 denotes a tank for receiving the oil which has flowed out of the oil receiver 12, and a detection device 15 for detecting the outflow of the oil is provided in the tank 14. Reference numeral 16 denotes a main rope wound around the pulley 5. One end of the main rope 16 is fixed to the car 17, and the other end is fixed to the cylinder base 7 or the like.

In FIG. 2, 15A is a switch of the detecting device 15, 18 is a relay which is excited when the switch 15A is turned on, 18A is a contact which is turned on when the relay 18 is excited, 19 is a magnet which is excited when the contact 18A is turned on, and
To command to avoid driving to the upper floor, 19A
Is a contact for forming a self-holding circuit which is turned on by the excitation of the relay 19. 20B is a contact for releasing the self-holding circuit.

However, if oil leaks from the oil receiver 12 due to clogging of the pipe 13 or the oil leak recovery device, the oil leaks into the tank 14. When the oil leaks into the tank 14, the detection device 15 operates and turns on the switch 15A. Thereby, a circuit of P-15A-18-N is formed, and the relay 18 is excited. By the excitation of the relay 18, the contact 18A is turned ON, and P-18A-20B-19
A -N circuit is configured, the relay 19 is excited, the self-holding contact 19A is turned on, and an avoidance operation command is issued to move the car 17 above the ground 2. Evacuate upward.

Therefore, even if oil leaks from the oil receiver, oil does not leak to the car 17 and the car 17 is not stained.

[0013]

According to the present invention, even if oil leaks from the oil pan and overflows into the hoistway, the car is not stained.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a hydraulic elevator including an operating device according to an embodiment of the present invention.

FIG. 2 is an operation circuit diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2 Hydraulic jack 3 Cylinder 4 Plunger 7 Cylinder stand 9 Gland 11 Packing 12 Oil receiver 14 Tank 15 Detection device 17 Basket 19 Avoidance operation command relay

Claims (1)

[Claims] 1. A hydraulic elevator operating device in which a hydraulic jack composed of a cylinder and a plunger is erected in a hoistway and a car is moved up and down via a rope by raising and lowering the plunger. A device for detecting that oil leaked from the oil receiver in the grounded portion leaked to the outside, and means for operating the car to avoid above the ground when the detecting device is operated. Hydraulic elevator operating device.