JPH0567553B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for correcting a sinking of a car floor of a hydraulic elevator to a predetermined level.

[Conventional technology]

In a hydraulic elevator, the car is raised and lowered by a hydraulic jack, but even if the car lands correctly on the floor, when a heavy object gets on the car, the car floor sinks due to the compression of oil. Furthermore, if the car is left on the floor for a long time, the car floor will sink due to changes in the temperature of the oil. For example, as shown in Japanese Patent Publication No. 49-32825, when the sinking of the car floor increases, pressure oil corresponding to the sinking amount of the car is supplied into the cylinder of the hydraulic jack to raise the car floor to a predetermined level. Corrections are being made. Also, repeating this correction operation will cause undesirable results such as hastening the wear of the contacts of the electromagnetic contactor that opens and closes the circuit of the electric motor for driving the hydraulic pump. Corrections are made only when the sinking amount is greater than the amount of sinking mentioned above.

Figures 2 to 4 are diagrams showing a conventional hydraulic elevator car floor correction device, in which Figure 2 is a vertical sectional view of the hoistway, Figure 3 is an explanatory diagram of the operating position of the level detection switch, and Figure 4 is an electrical It is a circuit diagram.

In Figures 2 and 3, 1 is a hoistway, 2 is a hydraulic jack consisting of a cylinder 2A buried in the bottom of the hoistway 1, and a plunger 2B that is raised and lowered by pressure oil in the cylinder 2A, and 3 is a hydraulic jack of the plunger 2B. A car connected to the head, 4 a car door, 5 a landing door, 6 a first level detector consisting of a switch provided on the car 3, and 7 a second level detector similar to the first level detector 6. A cam 8 is fixed to the wall of the hoistway 1 and operates the first and second level detectors 6 and 7.
6X is the operating range of the first level detector 6, and 7X is the operating range of the second level detector 7.

In Fig. 4, + and - are DC power supplies, 6a is a normally open contact of the first level detector 6, and 7a is the second level detector 7.
normally open contact, 10 is the upper floor matching relay, 10
a and 10b are normally open contacts, 11 is a door fully closed detection relay contact that opens when car door 4 is fully closed, 12 is an automatic operation relay contact that closes during automatic operation, and 13 is a contact for opening the floor door of car 3. The door-openable zone detection relay contact 14, which closes when the vehicle is in the possible door-openable zone, is a floor level lifting relay that supplies pressure oil to the cylinder 2A to raise the car 3 when energized.

The conventional hydraulic elevator car floor correction device is configured as described above, and when the car door 4 is open (the landing door 5 is also opened in conjunction with this, the landing door 5 will be omitted below). , the door fully closed detection relay contact 11 is closed. Assuming that the car is currently in automatic operation and the car 3 has landed on the floor, both the automatic operation relay contact 12 and the door-openable section detection relay contact 13 are closed.

In this state, when the floor of the car 3 sinks by a distance A from the floor level L in FIG. 3, the first level detector 6 engages with the cam 8, the contact 6a closes, and
The upper floor alignment relay 10 is energized by the circuit 6a-10--, and the contacts 10a and 10b are closed. Now, the floor alignment lift relay 14 is energized, so the car 3 rises. Car 3 rises and becomes the first car.
When the engagement between the level detector 6 and the cam 8 is released,
Since the contact 6a is open, the upper floor alignment relay 1
0 is deenergized, the contact 10b is opened, and the floor alignment lift relay 14 is deenergized. Now, the car 3 stops and the floor correction operation ends.

Further, when the car door 4 is fully closed, the door fully closed detection relay contact 11 is open. In this state, the car 3 sinks and the contact 6a of the first level detector 6
Even if is closed, the upward floor alignment relay 10 is not energized, so the car floor is not corrected.

When the car 3 further sinks and descends from the floor level L by a distance B, the second level detector 7 engages with the cam 8 and the contact 7a closes. Now +-7a-
In the circuit 6a-10--, upper floor matching relay 1
0 is energized and self-retains by closing contact 10a. Next, the floor alignment lift relay 14 is also energized, and the car 3 rises in the same way as when the car door 4 is open. Even when the car 3 rises and the second level detector contact 7a opens, the upward floor alignment relay 10 is not deenergized, and when the car 3 rises further and the first level detector contact 6a opens, the upper The direction floor alignment relay 10 is deenergized and the floor correction operation is completed.

[Problem that the invention seeks to solve]

In the conventional hydraulic elevator car floor correction device as described above, when the car door 4 is not fully closed,
The level difference between the landing floor and the car floor is kept small. However, if the car door 4 is fully closed, the car floor will not be corrected unless the level difference becomes large.
Therefore, if the car 3 is left on the floor for a long period of time, the car floor will sink significantly, making it dangerous for passengers to get into the car 3. Further, there are other problems such as the need to wait until the car door 4 is opened and the car floor is corrected.

This invention was made to solve the above problems, and provides a car floor correction device for a hydraulic elevator that reduces the level difference between the landing floor and the car floor to ensure safety when passengers board. The purpose is to provide.

[Means for solving problems]

The car floor correction device for a hydraulic elevator according to the present invention is provided with a stop switch that is operated to stop the car, and when the stop switch is not operated, the car floor correction operation is performed by the operation of the first level detector. In addition, when the pause switch is operated, the car floor correction operation is performed by operating a second level detector located below the first level detector.

[Effect]

In this invention, when the pause switch is not operated, the floor correction operation is performed when the car sinks to the position where the first level detector operates, regardless of whether the car door is opened or closed.

〔Example〕

FIG. 1 is an electrical circuit diagram showing one embodiment of the present invention, and FIGS. 2 and 3 can be used as they are. In addition, 1, 2, 2A, 2B, 3 to 8, 10, 10
a, 10b, 12 to 14, +, - are the same as those in the above conventional device.

In the figure, 15 is car 3, and car 3 is installed at the landing etc.
a pause switch that is closed when pausing the 16
is a pause relay, and 16a is its normally closed contact.

In the hydraulic elevator car floor correction device configured as described above, during normal operation, the pause switch 15 is open, the pause relay 16 is deenergized, and the contact 16a is closed.

In this state, when the car 3 sinks to the position where the first level detector 6 operates, +-16a-6a-1
The upward floor alignment relay 10 is energized by the circuit 0--, and the car 3 is raised to perform floor correction as described above.

When the pause switch 15 is closed, the pause relay 16 is energized and the contact 16a is opened. Now, even if the car 3 sinks and the first level detector 6 is activated, the upward floor alignment relay 10 will not be energized.
The car floor is not corrected. When the car 3 further descends and the second level detector 7 operates, +-7a-6a
-10--, the upward floor alignment relay 10 is energized, and then the floor alignment raising relay 14 is also energized, and the car 3 is raised. Then, when the first level detector contact 6a opens, the car 3 stops.

In this way, when the pause switch 15 is not operated, the level difference between the landing floor and the car floor is reduced to ensure passenger safety, and when the pause switch 15 is operated, the floor is corrected again with a slight level difference. prevent this from happening.

In the embodiment, the first and second level detectors 6, 7
are provided on the car 3, but these may be provided on the wall of the hoistway 1 and the cam 8 may be installed on the car 3.

[Effects of the Invention] As explained above, in this invention, when the stop switch that stops the car of the hydraulic elevator is not operated, the car floor correction operation is performed when the car operates the first level detector, When the pause switch is operated, the car floor correction operation is performed when the second level detector below the first level detector is operated, ensuring safety when passengers board the car. This also has the effect of preventing the car floor correction operation from being performed again when the car is at rest.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing one embodiment of a car floor correction device for a hydraulic elevator according to the present invention, FIG. Figure 3 is an explanatory diagram of the operating positions of the first and second level detectors in Figure 2;
FIG. 4 is an electrical circuit diagram showing a conventional hydraulic elevator car floor correction device. In the figure, 2 is the hydraulic jack, 3 is the cage, and 6 is the first
Level detector, 6a is the same left contact, 7 is the second level detector, 7a is the same left contact, 10 is a correction circuit (upward floor alignment relay), 14 is a correction circuit (floor alignment upward relay), 15 is a pause switch, 16a is a correction circuit (pause relay contact). Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims] 1. A first level detector that operates when the floor of the car that is raised and lowered by a hydraulic jack comes a predetermined distance below the landing floor; and a first level detector that operates when the floor of the car that is raised and lowered by a hydraulic jack comes a certain distance below the operating position of the first level detector. and a second level detector that operates, and issues a floor alignment command by operating the first or second level detector to raise the car and correct the car floor to a predetermined level, A stop switch is provided which is operated to stop the car, and when the stop switch is not operated, the above-mentioned floor alignment command is issued when the first level detector is operated, and when the stop switch is operated, the above-mentioned floor alignment command is issued. A car floor correction device for a hydraulic elevator, comprising a correction circuit that issues the floor alignment command when both the first and second level detectors operate.