JP2010023962A - Hydraulic elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic elevator device reducing an amount of upward/downward movement of a car when a passenger gets in or off the car, and reducing a starting shock of an elevator. <P>SOLUTION: The hydraulic pump device 5 is connected to a hydraulic jack 1 through a control opening/close valve circuit 19, and the car 2 elevated by the hydraulic jack is disposed. A stop-time opening/closing valve 7 is disposed between the hydraulic jack 1 and the control opening/close valve circuit 19, and a control device 17 is disposed to move up the car 2 by instructing supply of pressure oil to the hydraulic jack 1, to move down the car 2 by instructing discharge of pressure oil from the hydraulic jack 1, and to close the opening/closing valve 7 during stopage by the stop of the car 2. When the stop time of the car 2 reaches a predetermined time, the control device 17 performs a low speed movement control of the car 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hydraulic elevator apparatus that controls the operation of a hydraulic jack via a control opening / closing valve circuit by a hydraulic pump apparatus.

  In the hydraulic elevator apparatus, the car is caused to rise and fall due to the compressibility of the pressure oil due to load fluctuation caused by passengers getting on and off the car. For this reason, there is a problem that passengers feel uncomfortable when getting on and off, or the number of re-flooring operations increases with respect to the ups and downs of the car. In order to solve this problem, a hydraulic on-off valve device that closes the on-off valve when the car stops is provided between the hydraulic jack and the control on-off valve circuit to supply pressure oil to the hydraulic jack. A hydraulic elevator apparatus having a control device for instructing to raise the car, commanding the discharge of pressure oil from the hydraulic jack to lower the car, and closing the hydraulic on-off valve device by stopping the car Proposed. (For example, see Patent Document 1)

JP 11-322207 A (summary column, FIG. 1)

  According to the hydraulic elevator apparatus disclosed in the above-mentioned patent document, it is possible to reduce the amount of ups and downs of the car that occurs when passengers get on and off. However, in the above hydraulic elevator device, for example, when there is no passenger in the car and the maximum number of passengers get on, the hydraulic on-off valve device is closed and the pipe pressure and control on the hydraulic jack side are controlled. A large differential pressure is generated in the pipe pressure on the on-off valve side, and if the hydraulic on-off valve device is opened immediately before the descent operation, the car will suddenly descend by the amount of the differential pressure, which becomes a starting shock. A new problem of appearing occurs.

  In the above hydraulic elevator device, when the car is stopped for a long time, the oil on / off valve device and the control on / off valve are moved by time due to oil contraction due to oil temperature drop or oil leakage from the control on / off valve. The pressure in the pressure oil circuit may decrease. In particular, if the hydraulic jack and the control on-off valve are installed at a distance, the piping length of the pressure oil circuit between the hydraulic on-off valve device and the control on-off valve will be long, and this will have an effect if the car stops for a long time. It becomes easy to receive. Under this influence, the pressure in the hydraulic oil circuit between the hydraulic on-off valve device and the control on-off valve becomes lower than the pressure in the hydraulic jack, and in this case as well, a start shock may occur as described above. is there.

  The present invention has been made to solve the above-described problems, and provides a hydraulic elevator apparatus that can reduce the amount of ups and downs of a car that occurs when passengers get on and off and can reduce the start shock of the elevator apparatus. Is.

  A hydraulic elevator apparatus according to the present invention is provided between a hydraulic pump apparatus connected to the hydraulic jack via a control opening / closing valve circuit, and the hydraulic jack and the control opening / closing valve circuit, each of which is moved up and down by the operation of the hydraulic jack. Command the supply of pressure oil to the hydraulic jack and the hydraulic jack to raise the car, command the discharge of pressure oil from the hydraulic jack to lower the car, and And a control device that closes the hydraulic on-off valve device when stopped. The control device controls the car to move at a low speed when the stop time of the car reaches a predetermined time.

  According to the hydraulic elevator apparatus according to the present invention, it is possible to reduce the amount of ups and downs of the car generated when passengers get on and off, and to reduce the start shock of the elevator apparatus.

  Preferred embodiments of a hydraulic elevator apparatus according to the present invention will be described below with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a system configuration diagram showing a hydraulic elevator apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a hydraulic jack, and the hydraulic jack 1 supports a car 2. Reference numeral 3 denotes a hydraulic pump that can rotate in the reverse direction. The hydraulic pump 3 is driven by an electric motor 4. The hydraulic pump 3 and the electric motor 4 constitute a hydraulic pump device 5.

  Between the hydraulic jack 1 and the hydraulic pump 3, a control on-off valve 6 and a later-described hydraulic on-off valve device 7 are disposed. The control on-off valve 6 is connected to the main through a main chamber 6a and a valve body 6b. A back chamber 6c isolated from the chamber 6a is provided. The control on-off valve 6 and the hydraulic on-off valve device 7 are connected in series between the hydraulic pump 3 and the hydraulic jack 1 by a main circuit 8 of pressure oil. The main circuit 8 includes a first pressure oil circuit 8a connecting the hydraulic pump 3 and the main chamber 6a of the control on-off valve 6, a second pressure oil circuit 8b connecting the main chamber 6a and the hydraulic on-off valve device 7, and a hydraulic jack. 1 and a hydraulic pressure on-off valve device 7 is formed by a third pressure oil circuit 8c. The hydraulic pump 3 discharges the pressure oil to the oil tank 10 through the filter 9 when the car 2 is lowered.

  The pilot circuit 11 connects the second pressure oil circuit 8 b and the pressure oil inflow circuit 11 a that connects the back chamber 6 c of the control on-off valve 6, and the first pressure port that connects the back chamber 6 c of the control on-off valve 6 and the low-pressure port that opens to the oil tank 10. It is formed by a pressure oil discharge circuit 11b and a second pressure oil discharge circuit 11c provided between an opening adjusting throttle 13 and a second normally closed solenoid valve 12 described later.

  The pressure oil inflow circuit 11a is provided with a variable throttle valve 14, and the first pressure oil discharge circuit 11b is provided with a first normally closed electromagnetic valve 15 and a variable throttle valve 16 connected in series. . The first normally closed solenoid valve 15 opens or closes the first pressure oil discharge circuit 11b.

  The control device 17 controls the first normally closed solenoid valve 15, the hydraulic on-off valve device 7, and the electric motor 4, and the opening adjustment throttle 13 opens the control on-off valve 6 between fully open and fully closed during deceleration of the descending operation. It adjusts so that it can hold | maintain at the predetermined opening. The opening adjustment throttle 13 includes an adjustment screw 13b for adjusting the opening of the variable throttle 13a and a sleeve 13c that forms the opening of the variable throttle 13a between the adjustment screw 13b. A variable adjustment throttle valve 18 is provided between the second normally closed solenoid valve 12 connected to the second pressure oil discharge circuit 11 c and the oil tank 8. Reference numeral 19 denotes a control opening / closing valve circuit having the control opening / closing valve 6 as a main device, and reference numeral 20 denotes a speed detection device that detects the ascending / descending speed of the car 2 via an endless rope with one side held by the car 2. Is shown. Further, the hydraulic on-off valve device 7 is constituted by an electromagnetic valve and is disposed near the hydraulic jack 1 of the second pressure oil circuit 8b.

  FIG. 2 is a configuration diagram illustrating the hydraulic on-off valve device 7. As shown in FIG. 2, the hydraulic on-off valve device 7 includes a main valve 21 and an electromagnetic valve 22 that is provided in parallel with the main valve 21 and operates by energizing a solenoid. The main valve 21 and the electromagnetic valve 22 are connected by a main pressure oil circuit 23 indicated by a solid line and a sub pressure oil circuit 24 indicated by a broken line in the drawing. That is, the main pressure oil circuit 23 connects the main valve 21 and the second pressure oil circuit 8b through the port A, the main valve 21 and the third pressure oil circuit 8c through the port B, and so on. It is comprised from the 2nd main pressure oil circuit 23b connected via. The auxiliary pressure oil circuit 24 is connected between the main valve 21 and the first main pressure oil circuit 23a, and between the electromagnetic valve 22 and the first main pressure oil circuit 23a. The second sub pressure oil circuit 24b, the third sub pressure oil circuit 24c connecting the electromagnetic valve 22 and the second main pressure oil circuit 23b, and the main valve 21 and the third sub pressure oil circuit 24c. And a fourth auxiliary pressure oil circuit 24d to be connected. In addition, the code | symbol 25 of FIG. 2 has shown the throttle valve.

  The hydraulic on-off valve device 7 configured as described above operates as follows. That is, when the elevator apparatus is stopped, the main valve 21 and the electromagnetic valve 22 are closed, and the main pressure oil circuit 23 and the sub pressure oil circuit 24 are shut off.

  During lift operation of the elevator apparatus, the pressure oil from the control on-off valve 6 flows from the port A into the first main pressure oil circuit 23a and into the first sub pressure oil circuit 24a. When the pressure oil flows into the first auxiliary pressure oil circuit 24a, the valve body (not shown) of the main valve 21 is pushed down, and the main valve 21 is opened. Thus, a large amount of oil flows through the main valve 21 to the port B, flows into the hydraulic jack 1 through the third pressure oil circuit 8c, and raises the car 2. Note that the solenoid of the electromagnetic valve 22 is not energized during the lift operation of the elevator apparatus.

  Further, at the time of the ascending operation of the elevator device, the solenoid of the electromagnetic valve 22 is excited by the lowering command from the control device 17 and the electromagnetic valve 22 is opened. By opening the electromagnetic valve 22, the pressure oil of the hydraulic jack 1 flows from the port B through the third auxiliary pressure oil circuit 24c to the second auxiliary pressure oil circuit 24b, and is controlled from the port A via the second pressure oil circuit 8b. It flows into the valve 6. At this time, the pressure oil existing in the back chamber below the valve body of the main valve 21 also flows into the electromagnetic valve 22 through the fourth auxiliary pressure oil circuit 24d. As a result, the valve body of the main valve 21 is pulled down, the main valve 21 is opened, and a large amount of pressure oil flows into the control on-off valve 6 through the main pressure oil circuit 23. As shown in FIG. 3, after the stoppage of the elevator apparatus is decided, the flow rate of the pressure oil passing through the main valve 21 is reduced, the opening degree of the main valve 21 is reduced, and the solenoid of the electromagnetic valve 22 is simultaneously closed. Degauss.

  As described above, the hydraulic on-off valve device 7 shuts off the pressure oil circuit when the elevator device is stopped, and opens the pressure oil circuit when the elevator device is ascending or when the elevator device is descending to open and close the hydraulic jack 1. It operates so that pressure oil flows between the valves 6. The hydraulic on-off valve device 7 having such a configuration is advantageous because it only needs to energize the solenoid of the electromagnetic valve 22 only during the descending operation of the elevator apparatus.

  The hydraulic elevator apparatus according to Embodiment 1 is configured as described above. Next, the operation thereof will be described. FIG. 4 is a flowchart for explaining the operation of the hydraulic elevator apparatus according to the first embodiment. In particular, this is a subroutine that shows the operation of the control device 17 and is called periodically.

  First, in step S41, it is confirmed whether the elevator apparatus has stopped. If it is not a pause state, the process proceeds to step S47, and the pause time is cleared. When the pause state is confirmed in step S41, the process proceeds to step S42, and the pause time is counted.

  Next, in step S43, the time since the pause is confirmed. If the pause time has not reached the predetermined time, nothing is done and the pause state is continued. When the stop time reaches the predetermined time, the process proceeds to step S44, and the car 2 is raised at a low speed.

  The low-speed rising operation of the car 2 is, for example, the same operation method as the re-flooring operation performed when the floor of the car 2 is shifted from the landing floor.

  In step S45, the output of the speed detection device 20 is taken in and it is confirmed whether the car 2 is raised. If it has not risen, the low-speed climbing operation is continued as it is. If it is confirmed that the car 2 has risen, the process proceeds to step S46, and the low speed ascending operation command is stopped.

  As described above, since the car 2 is slightly moved, the pressure in the hydraulic jack 1 and the pressure in the second pressure oil circuit 8b can be matched, so that the starting shock is reduced. Further, if the count value of the pause time is cleared together with the low-speed rise operation command and the pause state continues, the low-speed rise operation can be performed again after a predetermined time.

  FIG. 5 is a flowchart for measuring the time until the car 2 moves slightly at a low speed. In FIG. 5, in step S51, in order to make the pressure in the hydraulic jack 1 and the pressure in the second pressure oil circuit 8b coincide with each other, it is confirmed whether or not a low-speed raising operation command is output. If the low speed ascending operation command is not output, the process proceeds to step S55, and the counter that measures the operating time of the low speed ascending operation is cleared. If the low-speed ascending operation command is output, the process proceeds to step S52, and the operation time of the low-speed ascending operation is counted.

  Next, the time for low-speed ascending operation is determined in step S53. Nothing is performed if the low-speed ascending operation time is within a predetermined time, but when the predetermined time is exceeded, there is a high possibility that pressure oil is leaking from the hydraulic piping. Therefore, it is possible to stop the low-speed climbing operation in step S54 and make the elevator device in a state where it cannot be restarted so that the passenger does not get in the car 2 by mistake.

  As described above, according to the hydraulic elevator apparatus according to the first embodiment, it is possible to provide a hydraulic elevator apparatus that reduces the amount of car ups and downs that occurs when passengers get on and off, and that reduces the start-up shock of the elevator apparatus. it can.

Embodiment 2. FIG.
Next, a hydraulic elevator apparatus according to Embodiment 2 will be described. FIG. 6 is a system configuration diagram showing the hydraulic elevator apparatus according to the second embodiment, and shows the hydraulic elevator apparatus without the speed detection device.

  As shown in FIG. 6, in the hydraulic elevator apparatus according to the second embodiment, a cam 60 is attached to a hoistway (not shown) instead of the speed detection device 20 of the hydraulic elevator apparatus according to the first embodiment. . The cam 60 is installed at the same level as the landing floor (not shown). Further, a re-flooring position detection switch 61 is installed on the car 2 to operate when it comes into contact with the cam 60. The re-flooring position detection switch 61 includes a lowering re-flooring position detection switch 61a and a rising re-flooring position detection switch 61b, which are provided on the landing floor and the car floor due to contraction of pressure oil. It detects level fluctuations. In addition, about another structure, it is the same as that of Embodiment 1, and abbreviate | omits description by attaching | subjecting the same code | symbol.

  The hydraulic elevator apparatus according to Embodiment 2 is configured as described above, and the operation thereof will be described next. FIG. 7 is a flowchart for explaining the operation of the hydraulic elevator apparatus according to the second embodiment. In particular, this is a subroutine that shows the operation in the control device 17 and is called periodically.

  First, in step S71, it is confirmed whether the elevator apparatus has stopped. If it is not a pause state, the process proceeds to step S77, and the pause time is cleared. When the pause state is confirmed in step S71, the process proceeds to step S72, and the pause time is counted.

  Next, in step S73, the time since the pause is confirmed. If the pause time has not reached the predetermined time, nothing is done and the pause state is continued. When the stop time reaches the predetermined time, the process proceeds to step S74, and the car 2 is raised at a low speed.

  The low-speed rising operation of the car 2 is, for example, the same operation method as the re-flooring operation performed when the floor of the car 2 is shifted from the landing floor.

  In step S75, the output of the descending re-flooring detection switch 61a is taken in and it is confirmed whether the car 2 has been raised. If the car 2 is not raised, the low-speed ascending operation is continued as it is. If it is confirmed that the descending re-flooring detection switch 61a is turned off, the process proceeds to step S76, and the low speed ascending operation command is stopped. When the descent re-flooring detection switch 61a is turned off, the normal re-flooring operation is executed, and the car 2 is lowered to the normal stop position.

  As described above, according to the hydraulic elevator apparatus according to the second embodiment, since the car 2 moves, the pressure in the hydraulic jack 1 can be matched with the pressure in the second pressure circuit 8b. Start-up shock is reduced. Further, if the count value of the pause time is cleared together with the low-speed rise operation command and the pause state continues, the low-speed rise operation can be performed again after a predetermined time.

  The hydraulic elevator apparatus according to the second embodiment includes a cam 60 attached to a hoistway and a re-flooring position detection switch that operates when contacting the cam 60 without installing a speed detecting device 20 that detects the raising / lowering speed of the car 2. 61 is a simple configuration in which the car 2 is installed, but, as in the first embodiment, the hydraulic pressure that reduces the amount of ups and downs of the car that occurs when passengers get on and off and reduces the startup shock of the elevator apparatus. An elevator device can be provided.

  The hydraulic elevator apparatus according to the present invention can be used as a hydraulic elevator apparatus that controls the operation of a hydraulic jack via a control opening / closing valve circuit by a hydraulic pump apparatus.

1 is a system configuration diagram showing a hydraulic elevator apparatus according to Embodiment 1 of the present invention. It is a block diagram explaining the hydraulic on-off valve apparatus used for the hydraulic elevator apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining operation | movement of the hydraulic on-off valve apparatus used for the hydraulic elevator apparatus which concerns on Embodiment 1 of this invention. It is a flowchart figure explaining operation | movement of the hydraulic elevator apparatus which concerns on Embodiment 1 of this invention. It is a flowchart figure which measures the time until a cage | basket | car moves at low speed slightly. It is a system block diagram which shows the hydraulic elevator apparatus which concerns on Embodiment 2 of this invention. It is a flowchart figure explaining operation | movement of the hydraulic elevator apparatus which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic jack 2 Car 3 Hydraulic pump 4 Electric motor 5 Hydraulic pump apparatus 6 Control on-off valve 6a Main chamber 6b Valve body 6c Back chamber 7 Hydraulic on-off valve device 8 Main circuit 8a First pressure oil circuit 8b Second pressure oil circuit 8c 3rd Pressure oil circuit 9 Filter 10 Oil tank 11 Pilot circuit 11a Pressure oil inflow circuit 11b First pressure oil discharge circuit 11c Second pressure oil discharge circuit 12 Second normally closed solenoid valve 13 Opening adjustment throttle 13a Variable throttle 13b Adjustment screw 13c Sleeve 14 Variable throttle valve 15 First normally closed solenoid valve 16 Variable throttle valve 17 Control device 18 Variable adjustment throttle valve 19 Control opening / closing valve circuit 20 Speed detection device 21 Main valve 22 Electromagnetic valve 23 Main pressure oil circuit 23a First main pressure oil circuit 23b Second main pressure oil circuit 24 Sub pressure oil circuit 24a First sub pressure oil circuit 24b Second sub pressure oil circuit 24c Third sub pressure oil circuit 24d Fourth Re floor alignment detection switch-pressure oil circuit 25 throttle valve 60 cam 61 again bed combined position detecting switch 61a again floor alignment detection switch 61b raising lowering

Claims (3)

  A hydraulic pump device connected to the hydraulic jack via a control on-off valve circuit, and a stop on-off valve provided between the hydraulic jack and the control on-off valve circuit; Command the supply of pressure oil to the hydraulic jack to raise the car, command the discharge of pressure oil from the hydraulic jack to lower the car, and stop the on-off valve when the car stops And a control device for closing the car, wherein the control device controls the car to move at low speed when the stop time of the car reaches a predetermined time. .   2. The hydraulic elevator apparatus according to claim 1, wherein a time until the car moves at a low speed is measured.   A hydraulic pump device connected to the hydraulic jack via a control on-off valve circuit, and a stop on-off valve provided between the hydraulic jack and the control on-off valve circuit; Command the supply of pressure oil to the hydraulic jack to raise the car, command the discharge of pressure oil from the hydraulic jack to lower the car, and stop the on-off valve when the car stops The control device controls the car to move to the upper re-leveling position at a low speed when the stop time of the car reaches a predetermined time. Hydraulic elevator apparatus characterized by being a thing.

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