JPH11322207A - Hydraulic elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic elevator generating little fluctuating vertical movement due to passengers' getting on and off the elevator and causing passengers to feel little discomfort due to fluctuating vertical movement. SOLUTION: A hydraulic jack 1 is connected with a hydraulic pump device 18 through a control switching valve circuit 17, and a car 2 lifted up and down by the hydraulic jack 1 is provided. A stopping switching valve 20 is provided between the hydraulic jack 1 and the control switching valve circuit 17, and a controller 13 is provided which commands the hydraulic jack 1 to supply pressure oil for conducting hoisting operation of the car 2, commands the hydraulic jack 1 to discharge pressure oil for conducting lowering operation of the car 2, and switches the stopping switching valve 20 by stopping the car 2. The control switching valve circuit 17 is shut off from the hydraulic jack 1 by the stopping switching valve when the car 2 stops and passengers get on or off the elevator. It is thus possible to reduce fluctuating vertical movement generated at the car 2 with the compressibility of pressure oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic elevator device in which the operation of a hydraulic jack is controlled by a hydraulic pump device via a control valve circuit.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a hydraulic circuit diagram showing a conventional hydraulic elevator device disclosed in Japanese Patent Application Laid-Open Publication No. H10-115,004. In the figure, 1 is a hydraulic jack, 2 is a basket supported by the hydraulic jack 1, 3 is a hydraulic pump that can rotate in the reverse direction, 4 is an electric motor that drives the hydraulic pump 3, 5 is a control opening and closing valve, and a main chamber 5a and a valve. A back room 5c isolated from the main room 5a via the body 5b is provided.

Reference numeral 6 denotes a main circuit for the hydraulic oil, which is formed by a first circuit 6a connecting the hydraulic pump 3 and the main chamber 5a of the control on-off valve 5, and a second circuit 6b connecting the hydraulic jack 1 and the main chamber 5a. I have. 7 is a filter, 8 is an oil tank, 9 is a pilot circuit, a pressure oil inflow circuit 9a connecting the hydraulic jack 1 and the back chamber 5c of the control opening and closing valve 5, and a low pressure opening to the back chamber 5c of the control opening and closing valve 5 and the oil tank 8. The second pressure oil discharge circuit 9c is provided between a first pressure oil discharge circuit 9b for connecting a port and a second normally closed solenoid valve from an opening adjustment throttle described later.

[0004] Reference numeral 10 denotes a first normally closed solenoid valve which is provided in the pressure oil discharge circuit 9b to open or close the circuit. 1
1 is a variable throttle valve provided in the pressure oil inflow circuit 9a, 12 is a variable throttle valve provided in the first pressure oil discharge circuit 9b, 13 is a control device for controlling the first normally closed solenoid valve 10 and the electric motor 4, Reference numeral 14 denotes an opening adjustment throttle which allows the control opening / closing valve 5 to be maintained at a predetermined opening between the fully opened state and the fully closed state during the deceleration of the descending operation.

Reference numeral 14a denotes a variable aperture 14 of the opening adjustment aperture 14.
an adjusting screw for adjusting the opening of b, a sleeve 14c for forming the opening of the variable throttle 14b with the adjusting screw 14a, and a second normally closed solenoid valve 15 connected to the second hydraulic oil discharge circuit 9c , 16 is a variable adjustment restrictor provided between the second normally closed solenoid valve 15 and the oil tank 8, 17 is a control opening / closing valve circuit mainly including the control opening / closing valve 5, 18 is a hydraulic pressure comprising the hydraulic pump 3 and the electric motor 4. The pump device 19 is a speed detecting device that detects the elevating speed of the car 2 through an endless rope whose one side is held by the car 2.

The conventional hydraulic elevator apparatus is constructed as described above, and the control opening / closing valve 5 is connected to the main chamber 5a between the hydraulic jack 1 and the hydraulic pump 3 and flows in and out of pressure oil in the back chamber 5c. The valve 5b is operated to open and close the pressure oil flow path between the hydraulic jack 1 and the hydraulic pump 3. When the car 2 is moving up and down, it opens, and when the car 2 is stopped, it closes.

When the ascending operation is commanded, the electric motor 4 is energized by the control device 13, and thereafter the first normally closed solenoid valve 10 is energized to open the first pressure oil discharge circuit 9b. Thereby, the pressure oil in the back chamber 5c of the control on-off valve 5 is discharged to the oil tank 8, and the control on-off valve 5 is opened. Then, when the control on-off valve 5 is opened, the hydraulic oil discharged from the hydraulic pump 3 flows into the hydraulic jack 1 from the control on-off valve 5.

Further, the rotation speed of the electric motor 4 is controlled by the control device 13, and the car 2 is raised according to a predetermined operation pattern. Next, the car 2 arrives at the target floor and stops, the controller 13 issues a command to close the control on-off valve 5, and the first normally closed solenoid valve 10 of the first pressure oil discharge circuit 9b is deenergized. As a result, the first pressure oil discharge circuit 9b is closed, and the control on-off valve 5 is fully closed.

When a descending operation is instructed, the controller 1
3, the first normally closed solenoid valve 10 is urged to open the first pressure oil discharge circuit 9b. Thereby, the pressure oil in the back chamber 5c of the control on-off valve 5 is discharged to the oil tank 8, and the control on-off valve 5 is opened. When the control on-off valve 5 opens, the pressure oil in the hydraulic jack 1 is pressurized by the weight of the car 2, and the hydraulic jack 1, the control on-off valve 5, the hydraulic pump 3 and the filter 7
Is discharged to the oil tank 8 through

The control device 13 discharges the pressure oil in the hydraulic jack 1 through the hydraulic pump 3 driven by the electric motor 4. Further, since the hydraulic pump 3 is driven by the pressure in the hydraulic jack 1 generated by the weight of the car 2 and the flow rate discharged from the hydraulic jack 1, the hydraulic pump 3
Is connected to the motor 4 to perform a dynamic braking operation. And
By controlling the rotation speed of the electric motor 4 by the control device 13, the car 2 descends according to a predetermined operation pattern.

Next, the car 2 arrives at the target floor and stops, and the control device 13 issues a command to close the control on-off valve 5, and the first normally closed solenoid valve 1 of the first pressure oil discharge circuit 9b.
0 is deenergized, the first pressure oil discharge circuit 9b is closed, and the control on-off valve 5 is fully closed. In this way, the elevator operation of the car 2 is performed.

[0012]

In the above-described conventional hydraulic elevator apparatus, the load fluctuation caused by the passenger getting on and off the car 2 causes the car 2 to float and float due to the compressibility of the pressure oil. For this reason, there has been a problem that the passenger feels uncomfortable when getting on and off, and the number of times of re-floating operation for the ups and downs of the car 2 increases.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a hydraulic elevator apparatus which causes less ups and downs in a car when a passenger gets on and off the car.

[0014]

In a hydraulic elevator apparatus according to the present invention, a hydraulic pump apparatus connected to a hydraulic jack via a control opening / closing valve circuit, and a hydraulic pump apparatus which moves up and down by the operation of the hydraulic jack, The on-off valve provided between the control on-off valve circuit and the stop valve is operated to raise the car by instructing the supply of hydraulic oil to the hydraulic jack, and to lower the car by instructing the discharge of hydraulic oil from the hydraulic jack. ,
And a control device for closing the stop-time on-off valve by stopping the car.

In the hydraulic elevator apparatus according to the present invention, the car is instructed to supply hydraulic oil to the hydraulic jack to perform an ascending operation, and the hydraulic jack is instructed to discharge hydraulic oil to perform a descending operation of the car; A control device is provided for closing the stop-time on-off valve by stopping the car and opening the door of the car.

Further, in the hydraulic elevator apparatus according to the present invention, the car is operated to ascend by instructing the supply of hydraulic oil to the hydraulic jack, and the car is operated to descend by instructing discharge of the hydraulic oil from the hydraulic jack, and A control device that closes the stop-time on-off valve in response to a car stop command and a car door-opening start command at the latest, and opens the stop-time on-off valve when the car stops and the car door closes as soon as possible. Is provided.

Further, in the hydraulic elevator apparatus according to the present invention, the car is instructed to supply hydraulic oil to the hydraulic jack to perform an ascending operation, the hydraulic jack is instructed to discharge hydraulic oil to perform a descending operation of the car, and Control to close the stop-time on-off valve in response to a car stop command and a car door-opening start command at the latest, and to open the stop-time on-off valve in response to a car door closing and car travel start command at the latest. An apparatus is provided.

In the hydraulic elevator apparatus according to the present invention, the car is instructed to supply pressure oil to the hydraulic jack to perform an ascending operation, the hydraulic jack is instructed to discharge pressure oil to perform a descending operation of the car, and Close the stop-time on-off valve before the car stop command and the car door open start command,
A control device is provided that opens the stop-time on-off valve in response to a car door closing and a car running start command at the latest.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 and 2
FIG. 1 is a diagram showing a hydraulic circuit diagram, FIG. 2 is a graph showing an operation by a control device of FIG. 1, (a) is a speed of a car, and (b) is a running of a car. Command,
(C) shows a door opening / closing command, and (d) shows a stop-time on-off valve opening / closing command. In the figure, 1 is a hydraulic jack, 2 is a basket supported by the hydraulic jack 1, 3 is a hydraulic pump that can rotate in the reverse direction, 4 is an electric motor that drives the hydraulic pump 3, 5 is a control opening and closing valve, and a main chamber 5a and a valve. A back room 5c isolated from the main room 5a via the body 5b is provided.

Reference numeral 6 denotes a main circuit for the hydraulic oil, which is formed by a first circuit 6a connecting the hydraulic pump 3 and the main chamber 5a of the control on-off valve 5, and a second circuit 6b connecting the hydraulic jack 1 and the main chamber 5a. I have. 7 is a filter, 8 is an oil tank, 9 is a pilot circuit, a pressure oil inflow circuit 9a connecting the hydraulic jack 1 and the back chamber 5c of the control opening and closing valve 5, and a low pressure opening to the back chamber 5c of the control opening and closing valve 5 and the oil tank 8. The second pressure oil discharge circuit 9c is provided between a first pressure oil discharge circuit 9b for connecting a port and a second normally closed solenoid valve from an opening adjustment throttle described later.

A first normally closed solenoid valve 10 is provided in the first pressure oil discharge circuit 9b and opens or closes the circuit. 11 is a variable throttle valve provided in the pressure oil inflow circuit 9a,
12 is a variable throttle valve provided in the first pressure oil discharge circuit 9b,
Reference numeral 13 denotes a control device for controlling the first normally closed solenoid valve 10 and the electric motor 4, and reference numeral 14 denotes an opening adjustment for maintaining the control opening / closing valve 5 at a predetermined opening between full open and fully closed during deceleration of the descending operation. Aperture.

Reference numeral 14a denotes a variable aperture 14 of the aperture adjustment aperture 14.
an adjusting screw for adjusting the opening of b, a sleeve 14c for forming an opening of the variable throttle 14b with the adjusting screw 14a, and a second normally closed solenoid valve 15 connected to the second hydraulic oil discharge circuit 9c , 16 is a variable adjustment throttle provided between the second normally closed solenoid valve 15 and the oil tank 8, and 17 is a control opening / closing valve circuit mainly including the control opening / closing valve 5.

Reference numeral 18 denotes a hydraulic pump device including the hydraulic pump 3 and the electric motor 4, and reference numeral 19 denotes a speed detecting device for detecting the elevating speed of the car 2 via an endless rope held on one side of the car 2. Reference numeral 20 denotes a stop-time on-off valve which is provided in the first circuit 6a and includes an electromagnetic valve arranged near the hydraulic jack 1.

In the hydraulic elevator apparatus configured as described above, the control opening / closing valve 5 is connected to the main chamber 5a between the hydraulic jack 1 and the hydraulic pump 3, and is controlled by the flow of pressure oil in the back chamber 5c. Activate the body 5b to operate the hydraulic jack 1
The hydraulic fluid passage between the hydraulic pump 3 and the hydraulic pump 3 is opened and closed. And
It opens when the car 2 moves up and down, and closes when the car 2 stops.

If the ascending operation is commanded, the motor 4 is energized by the control device 13 and thereafter the first normally closed solenoid valve 10 is energized to open the first pressure oil discharge circuit 9b. Thereby, the pressure oil in the back chamber 5c of the control on-off valve 5 is discharged to the oil tank 8, and the control on-off valve 5 is opened. Then, when the control on-off valve 5 is opened, the hydraulic oil discharged from the hydraulic pump 3 flows into the hydraulic jack 1 from the control on-off valve 5.

Further, the rotation speed of the electric motor 4 is controlled by the control device 13, and the car 2 moves up according to a predetermined operation pattern. Then, the car 2 arrives at the target floor and stops, the control device 13 issues a command to close the control on-off valve 5, and the first normally closed solenoid valve 10 of the first pressure oil discharge circuit 9b is deenergized. As a result, the first pressure oil discharge circuit 9b is closed, and the control on-off valve 5 is fully closed.

When a descending operation is commanded, the controller 1
3, the first normally closed solenoid valve 10 is urged to open the first pressure oil discharge circuit 9b. Thereby, the pressure oil in the back chamber 5c of the control on-off valve 5 is discharged to the oil tank 8, and the control on-off valve 5 is opened. When the control on-off valve 5 opens, the pressure oil in the hydraulic jack 1 is pressurized by the weight of the car 2, and the hydraulic jack 1, the control on-off valve 5, the hydraulic pump 3 and the filter 7
Is discharged to the oil tank 8 through

Next, the control device 13 discharges the pressure oil in the hydraulic jack 1 through the hydraulic pump 3 driven by the electric motor 4. Further, since the hydraulic pump 3 is driven by the pressure in the hydraulic jack 1 generated by the weight of the car 2 and the flow rate discharged from the hydraulic jack 1, the hydraulic pump 3
Is connected to the motor 4 to perform a dynamic braking operation. And
By controlling the rotation speed of the electric motor 4 by the control device 13, the car 2 descends according to a predetermined operation pattern.

When the car 2 arrives at the target floor and stops, the control device 13 issues a command to close the control on-off valve 5, and the first normally closed solenoid valve 1 of the first pressure oil discharge circuit 9b.
0 is deenergized, the first pressure oil discharge circuit 9b is closed, and the control on-off valve 5 is fully closed. Thus, the elevator operation of the car 2 is performed. Then, it is confirmed that a high-speed automatic ascending or descending command of the car 2 is not issued, and then, although not shown, a command to open the landing of the hydraulic elevator device and the door of the car 2 is issued by the control device 13, although not shown. Then, the stop-time on-off valve 20 is closed.

Thereafter, a command to close the door is issued, and the stop-time on-off valve 20 is opened to issue a traveling command for the car 2, and the car 2 starts to move up or down. When the traveling car 2 arrives at the target floor, the traveling command of the car 2 disappears, a command to open the door is issued, and the stop-time on-off valve 20 is closed. Next, a door closing command is issued, and the stop-time on-off valve 20 is opened.

As described above, the stop-time on-off valve 20 is closed in a state where the car 2 is stopped and the door is opened, that is, in a state where the passenger gets on and off the car 2. Thereby, the control opening / closing valve circuit 17 connected to the hydraulic jack 1 and reaching the closed control opening / closing valve 5 is cut off from the hydraulic jack 1. For this reason,
Due to the load fluctuation caused by the passenger getting on and off the car 2, the amount of floating and sinking occurring in the car 2 due to the compressibility of the pressure oil decreases.

Therefore, it is possible to solve the problem that the passenger feels uncomfortable when boarding or disembarking, and the number of times of re-adjustment of the floor of the car 2 is increased.
1 and 2, the stop-time on-off valve 20 in the embodiment of FIG. 1 and FIG. 2 is replaced with an on-off valve driven and operated by an appropriate electric motor or another hydraulic device. The same operation as the embodiment of FIG. 2 can be obtained.

Embodiment 2 FIG. FIG. 3 is a diagram showing an example of another embodiment of the present invention, and is a graph showing the operation of the control device of the hydraulic elevator apparatus, wherein (a) shows the speed of the car, (b) shows the car traveling command, c) is a door opening / closing command,
(D) shows a stop-time on-off valve opening / closing command. Except for FIG. 3, a hydraulic elevator apparatus is configured in the same manner as in the above-described embodiment of FIGS.

Then, the elevator operation of the car 2 is performed in the same manner as in the embodiment shown in FIGS. And basket 2
It is confirmed that a high-speed automatic ascending or descending command is not issued, and then the controller 13 simultaneously or simultaneously issues a command to open the landing of the hydraulic elevator device and the door of the car 2 (not shown). Before that, the on-off valve 20 is closed.

Thereafter, at the same time as or after the door is closed, the stop-time on-off valve 20 is opened and a traveling command for the car 2 is issued, and the car 2 starts to move up or down. Then, when the traveling car 2 arrives at the target floor, the car 2
When the traveling command is lost and the door opening command is issued, the stop-time on-off valve 20 is closed simultaneously with or before the opening command. Next, at the same time as the closing of the door or after the closing of the door, the stop-time on-off valve 20
Is released.

As described above, when the car 2 is stopped and the door is opened, that is, when passengers get on and off the car 2, the stop-time on-off valve 20 is closed. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

In the embodiment shown in FIG. 3, the stop-time on-off valve 20 is closed when the door is opened and closed. Accordingly, the amount of floating and sinking generated in the car 2 due to the compressibility of the pressure oil is reduced due to the load fluctuation caused by the swing of the car 2 due to the opening and closing operation of the door. Thereby, the discomfort felt by the passenger during the opening and closing operation of the door can be eliminated.

Embodiment 3 FIG. 4 is also a diagram showing an example of another embodiment of the present invention, and is a graph showing the operation of the control device of the hydraulic elevator apparatus, where (a) is the speed of the car, (b) is the car traveling command, ( c) is a door opening / closing command,
(D) shows a stop-time on-off valve opening / closing command. Except for FIG. 4, a hydraulic elevator apparatus is configured similarly to the embodiment of FIGS. 1 and 2 described above.

Then, the car 2 is moved up and down in the same manner as in the embodiment shown in FIGS. And basket 2
It is confirmed that the high-speed automatic ascending or descending command is not issued, and then the control device 13 issues a command to open the landing of the hydraulic elevator device and the door of the car 2 (not shown), and also displays The on-off valve 20 is closed.

Thereafter, at the same time as or before the travel command for the car 2 is issued, the stop-time on-off valve 20 is opened, and the car 2 starts to rise or fall. When the traveling car 2 arrives at the target floor, the stop-time on-off valve 20 is closed simultaneously with the disappearance of the travel command of the car 2 or after the disappearance of the travel command. Is issued. Thereafter, a door closing command is issued and the stop-time on-off valve 20 is opened.

As described above, when the car 2 is stopped and the door is opened, that is, when passengers get on and off the car 2, the stop-time on-off valve 20 is closed. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

In the embodiment shown in FIG. 4, the stop-time on-off valve 20 is closed even during the door opening / closing operation. Accordingly, the amount of floating and sinking generated in the car 2 due to the compressibility of the pressure oil is reduced due to the load fluctuation caused by the swing of the car 2 due to the opening and closing operation of the door. Thereby, the discomfort felt by the passenger during the opening and closing operation of the door can be eliminated.

Embodiment 4 FIG. FIG. 5 also shows an example of another embodiment of the present invention, and is a graph showing the operation of the control device of the hydraulic elevator apparatus, where (a) is the speed of the car, (b) is the car traveling command, ( c) is a door opening / closing command,
(D) shows a stop-time on-off valve opening / closing command. Except for FIG. 5, a hydraulic elevator apparatus is configured in the same manner as in the above-described embodiment of FIGS.

Then, the car 2 is moved up and down in the same manner as in the embodiment shown in FIGS. And basket 2
It is confirmed that the high-speed automatic ascending or descending command has not been issued, and then the control device 13 opens and closes the stop-and-stop operation before the command to open the landing of the hydraulic elevator device and the door of the car 2 (not shown). Valve 20 is closed.

When the stop-time on-off valve 20 is closed and a signal is received that the door of the car 2 is closed or after the reception of the door-closing signal and a driving command for the car 2 is issued. Simultaneous or before the travel command, stop valve 20
Is released. This causes the car 2 to start moving up or down.

When the traveling car 2 arrives at the target floor, at the same time as the traveling command of the car 2 disappears or after the traveling command disappears, and before the car door opening command, the stop-time on-off valve. 20 is closed. With the closing of the stop-time on-off valve 20, the stop-time on-off valve 20 is opened at the same time as receiving a signal that the door is closed thereafter or after receiving the door closing signal.

As described above, when the car 2 is stopped and the door is opened, that is, when passengers get on and off the car 2, the stop-time on-off valve 20 is closed. Therefore, although the detailed description is omitted, the same operation as the embodiment of FIGS. 1 and 2 can be obtained in the embodiment of FIG.

In the embodiment shown in FIG. 5, the stop-time on-off valve 20 is closed even during the door opening / closing operation. Accordingly, the amount of floating and sinking generated in the car 2 due to the compressibility of the pressure oil is reduced due to the load fluctuation caused by the swing of the car 2 due to the opening and closing operation of the door. Thereby, the discomfort felt by the passenger during the opening and closing operation of the door can be eliminated.

[0049]

As described above, the present invention provides a hydraulic pump device which is connected to a hydraulic jack via a control on-off valve circuit, in accordance with the operation of the hydraulic jack.
The shut-off valve provided between the hydraulic jack and the control on-off valve circuit, and the supply of pressurized oil to the hydraulic jack are operated to raise the car, and the car is commanded to discharge the pressurized oil from the hydraulic jack. And a control device for performing a descent operation and closing the stop-time on-off valve by stopping the car.

As a result, the stop-time on-off valve is closed in a state where the car is stopped, that is, in a state where the passenger gets on and off the car by opening the door. As a result, the control valve circuit connected to the hydraulic jack and leading to the closed control valve is shut off from the hydraulic jack. For this reason, due to the load fluctuation caused by the passenger getting on and off the car, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. Therefore, there is an effect of solving the problem that the passenger feels uncomfortable when getting on and off, and the number of times of re-floating operation for the ups and downs of the car increases.

Further, as described above, the present invention instructs the supply of pressure oil to the hydraulic jack to raise the car,
A control device is provided for operating the descent of the car by instructing discharge of pressure oil from the hydraulic jack, and closing the on-off valve when the car is stopped and the car door is opened.

As a result, the car is stopped and the door is opened, that is, the passenger enters and exits the car, whereby the stop-time on-off valve is closed. As a result, the control valve circuit connected to the hydraulic jack and leading to the closed control valve is shut off from the hydraulic jack. For this reason, due to the load fluctuation caused by the passenger getting on and off the car, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. Therefore, there is an effect of solving the problem that the passenger feels uncomfortable when getting on and off, and the number of times of re-floating operation for the ups and downs of the car increases.

Further, as explained above, the present invention instructs the supply of pressure oil to the hydraulic jack to raise the car,
The car is lowered by commanding the hydraulic oil to be discharged from the hydraulic jack, and the on-off valve for stop is closed by the car stop command and the car door opening start command at the latest, and the car is stopped and the car is stopped at the earliest. A control device is provided for opening the stop-time on-off valve when the car door is closed.

As a result, the stop valve is closed when the car is stopped and the door is opened, that is, when the passenger gets on and off the car and when the door is opened and closed. As a result, the control valve circuit connected to the hydraulic jack and leading to the closed control valve is shut off from the hydraulic jack. For this reason, due to the load fluctuation caused by the passenger getting on and off the car, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. Therefore, there is an effect of solving the problem that the passenger feels uncomfortable when getting on and off, and the number of times of re-floating operation for the ups and downs of the car increases. Also, due to load fluctuations caused by the swinging of the car due to the opening and closing operation of the door,
The amount of floating and sinking generated in the car due to the compressibility of the pressurized oil is reduced. This has the effect of eliminating the discomfort felt by the passenger during the opening and closing operation of the door.

Further, as described above, the present invention instructs the supply of pressure oil to the hydraulic jack to raise the car,
The car is lowered by instructing the hydraulic jack to discharge hydraulic oil, and the stoppage on-off valve is closed by the car stop command and the car door opening start command at the latest, and the car door is closed. And a control device for opening the stop-time on-off valve in response to a car running start command at the latest.

Accordingly, when the car is stopped and the door is opened, that is, when the passenger gets on and off the car and until the car starts to run after the door is closed, the stop-time on-off valve is closed. Is done. As a result, the control valve circuit connected to the hydraulic jack and leading to the closed control valve is shut off from the hydraulic jack. For this reason, due to the load fluctuation caused by the passenger getting on and off the car, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. Therefore, there is an effect of solving the problem that the passenger feels uncomfortable when getting on and off, and the number of times of re-floating operation for the ups and downs of the car increases. Also, due to the load fluctuation accompanying the swing of the car due to the opening and closing operation of the door, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. This has the effect of eliminating the discomfort felt by the passenger during the opening and closing operation of the door.

Also, as described above, the present invention instructs the supply of hydraulic oil to the hydraulic jack to raise the car,
Operate the car downward by instructing the hydraulic jack to discharge hydraulic oil, close the stop-time on-off valve before the car stop command and the car door open start command, and close the car door. And a control device for opening the stop-time on-off valve in response to a car running start command at the latest.

Accordingly, when the car is stopped and the door is opened, that is, when the passenger gets on and off the car and until the car starts driving after the door is closed, the stop-time on-off valve is closed. Is done. As a result, the control valve circuit connected to the hydraulic jack and leading to the closed control valve is shut off from the hydraulic jack. For this reason, due to the load fluctuation caused by the passenger getting on and off the car, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. Therefore, there is an effect of solving the problem that the passenger feels uncomfortable when getting on and off, and the number of times of re-floating operation for the ups and downs of the car increases. Also, due to the load fluctuation accompanying the swing of the car due to the opening and closing operation of the door, the amount of floating and sinking generated in the car due to the compressibility of the pressure oil decreases. This has the effect of eliminating the discomfort felt by the passenger during the opening and closing operation of the door.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram showing a first embodiment of the present invention.

FIG. 2 is a graph showing the operation of the control device of FIG. 1,
(A) is a car speed, (b) is a car traveling command, (c) is a door opening / closing command, and (d) is a stop on-off valve opening / closing command.

FIG. 3 is a diagram corresponding to FIG. 2 showing the second embodiment of the present invention.

FIG. 4 is a diagram corresponding to FIG. 2 showing the third embodiment of the present invention.

FIG. 5 is a diagram corresponding to FIG. 2 showing the fourth embodiment of the present invention.

FIG. 6 is a hydraulic circuit diagram showing a conventional hydraulic elevator device.

[Description of Signs] 1 hydraulic jack, 2 baskets, 13 control device, 17
Control on-off valve circuit, 18 hydraulic pump device, 20 on-off valve.

Claims (5)

[Claims] 1. A hydraulic pump device connected to the hydraulic jack via a control opening / closing valve circuit and a stop provided between the hydraulic jack and the control opening / closing valve circuit. The on-off valve and the supply of pressure oil to the hydraulic jack are commanded to raise the car, the discharge of pressure oil from the hydraulic jack is commanded to lower the car, and the car is stopped to stop the car. A hydraulic elevator device comprising a control device for closing a stop-time on-off valve. 2. A car is operated to ascend by instructing the supply of hydraulic oil to a hydraulic jack, the car is operated to descend by instructing discharge of hydraulic oil from the hydraulic jack, and the car is stopped and the car is stopped. 2. The hydraulic elevator device according to claim 1, wherein the control device is configured to close the stop-time on-off valve when the door is opened. 3. A car is commanded to supply hydraulic oil to a hydraulic jack to ascend the car, a hydraulic oil is ejected from the hydraulic jack to descend the car, and a car stop command and at the latest the car A control device that closes the stop-time on-off valve in response to the car door opening start command, and opens the stop-time on-off valve when the car stops and at the earliest when the car door closes. The hydraulic elevator apparatus according to claim 1, wherein: 4. A car is commanded to supply hydraulic oil to a hydraulic jack to raise the car, a command to discharge pressure oil from the hydraulic jack is issued to lower the car, and the car stop command and at least the car A control device that closes the stop-time on-off valve in response to a car door open start command, and opens the stop-time on-off valve in response to the car door start and the car travel start command at the latest at the same time. Claim 1 characterized by the following:
The hydraulic elevator device as described. 5. A car which is instructed to supply pressure oil to a hydraulic jack to perform an ascending operation, a command to discharge pressure oil from said hydraulic jack to operate said car in a descending manner, and a stop command of said car and said car A control device that closes the stop-time on-off valve before the door-opening start command of the car and opens the stop-time on-off valve by the car start command at the latest when the car door is closed and at the latest. The hydraulic elevator apparatus according to claim 1, wherein: