JP2002321893A - Lifting device for mechanical parking equipment - Google Patents

Abstract

(57) [Problem] To provide a lifting device for mechanical parking equipment which can stably hold a pallet unit at a rising position, has a simple structure, and is resistant to water damage. A pallet unit (21, 22) is provided in a pit (23).
Is a lifting device 20 for raising and lowering the device. Pistonless hydraulic cylinders 24 to 27 are arranged in the pit 23 along the vertical direction. Hydraulic cylinders 24-27
Solenoid switching valve 32 that allows / restricts the flow of hydraulic oil to
-25 were connected directly to hydraulic cylinders 24-27. Hydraulic oil ports 36-3 to which each electromagnetic switching valve 32-35 is attached
9 is provided near the upper end of the hydraulic cylinders 24-27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical parking system in which a plurality of pallets (pallet units) for mounting a vehicle, which are interconnected by columns in a vertically separated state, are integrally lifted and lowered. More specifically, the present invention relates to a pallet lifting device applied to this mechanical parking facility.

[0002]

2. Description of the Related Art Among mechanical parking facilities for raising and lowering pallets, in parking facilities formed by digging a pit, a plurality of pallets are generally fixed to each other in a vertically separated state. . A unit in which the plurality of pallets are integrated is called a pallet unit. The pallet unit is moved up and down by a hydraulic cylinder, for example. As a result, the pallet unit moves back and forth with respect to the pit, and the vehicle can be moved in and out of the pallet by positioning the desired pallet at the entry level.

[0003] In such parking equipment, an elevating device for elevating and lowering the pallet unit has a structure as shown in FIG.

Referring to FIG. 1, reference numeral 1 denotes a pallet unit, which is a predetermined bracket 2
The hydraulic cylinders 3 and 4 are connected to the hydraulic cylinders 3 and 4, and are moved up and down as the hydraulic cylinders 3 and 4 expand and contract.
Reference numeral 5 also indicates a pallet unit, which is raised and lowered by hydraulic cylinders 6 and 7. That is, the parking equipment shown in FIG. 1 includes two pallet units 1 and 5. Each hydraulic cylinder 3,
4, 6, and 7 are of a pistonless type.

Reference numeral 8 denotes each hydraulic cylinder 3,
A hydraulic source for supplying pressure oil to operate 4, 6, 7 is shown. When the hydraulic cylinders 3, 4, 6, 7 are extended, hydraulic oil is supplied from the hydraulic pump 9 to the solenoid valves 10, 11, and by switching these, the hydraulic oil is supplied to the hydraulic cylinders 3, 4, 6, 6. It is sent to 7. Thereby, each pallet unit 1, which is arranged in the pit 12,
5 rises.

On the other hand, when the hydraulic cylinders 3, 4, 6, 7 are to be shortened, the operation of the hydraulic pump 9 is stopped and the solenoid valve 1 is turned off.
By switching between 0 and 11, hydraulic oil is discharged from each of the hydraulic cylinders 3, 4, 6, and 7 by the weight of each of the pallet units 1 and 5. At this time, the operating oil discharged from each of the hydraulic cylinders 3, 4, 6, and 7 is changed by switching the electromagnetic valve 13 provided in the hydraulic
Returned to 4. Thereby, each pallet unit 1, 5
Are accommodated in the pit 12. Note that reference numeral 15
Indicates a safety valve.

[0007]

Since the elevating device has the above-described structure, the following problems have been pointed out.

First, a solenoid valve 10 for supplying pressure oil to the hydraulic cylinders 3 and 4 is connected to the hydraulic cylinders 3 and 4 and a hydraulic source 8.
The solenoid valve 10 and the hydraulic cylinders 3 and 4 are connected to the pipe 1
6. This is the same for the hydraulic cylinders 6, 7 and the solenoid valve 11.

For this reason, the hydraulic cylinders 3, 4, 6, 7
When the loads on the hydraulic cylinders 3 and 4 and the hydraulic cylinders 6 and 7 are different when the hydraulic cylinders 3 and 4 are in the extended state (when the pallet units 1 and 5 are in the raised state), the strokes of the hydraulic cylinders 3 and 4 match. Or the strokes of the hydraulic cylinders 6 and 7 do not match,
There is a problem that 5 may be inclined.

When the pipes 16 and 17 are damaged,
Since the hydraulic oil may leak and the pallet units 1 and 5 may fall, there is a problem that a separate fall prevention device must be provided.

Further, the solenoid valves 10 and 11 are usually arranged in the pit 12 for the purpose of arranging the solenoid valves 10 and 11 and rationally arranging these pipes. However, if the solenoid valves 10 and 11 are disposed in the pit 12, if water or the like accumulates in the pit 12, the solenoid valves 10 and 11 will be submerged and their functions will be stopped. There was a problem that there was a possibility.

In addition, since the solenoid valves 10 and 11 are provided in the pit, the pipes 16 and 17 are connected to the lower ends of the cylinder tubes of the hydraulic cylinders 3, 4, 6, and 7, respectively. become. For this reason, at the time of the initial setting of the parking facility, it is difficult to release the air from each of the hydraulic cylinders 3, 4, 6, and 7, so that there is a problem that a separate air release valve must be provided.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lifting device for mechanical parking equipment which can stably hold a pallet unit at a raised position, has a simple structure, and is resistant to flood damage.

[0014]

Means for Solving the Problems (1) In order to achieve the above object, a mechanical parking equipment lifting device according to the present application is a mechanical parking equipment for raising and lowering a pallet unit for loading a vehicle with respect to a pit. A piston-less hydraulic cylinder disposed vertically in the pit and supporting the pallet unit up and down, and a first port and a second port. The mode can be switched between an allowance mode that allows the flow of hydraulic oil between the two ports and a regulation mode that restricts the flow of the hydraulic oil between the two ports, and one of the first port and the second port is connected to the hydraulic cylinder. A switching valve directly connected to a hydraulic oil port provided near the upper end, and an oil tank and a hydraulic pump that sucks hydraulic oil from the oil tank and supplies pressure oil at a predetermined pressure. And a hydraulic source for supplying pressure oil to one of the first port and the second port and for supplying hydraulic oil returned from one of the first port and the second port to the oil tank. It is characterized by having.

According to this configuration, the pressure oil supplied from the hydraulic pressure source is supplied to one of the first port and the second port of the switching valve. When the switching valve is switched to the allowable mode, the pressure oil flows between the two ports and is fed into the hydraulic cylinder, and the cylinder rod extends. Thereby, the pallet unit is raised.

When the pallet unit rises to a predetermined elevation position, the switching valve is switched to the regulation mode, whereby the outflow of hydraulic oil from the hydraulic cylinder is regulated, and the pallet unit is held at the elevation position. Moreover,
Since one of the first port and the second port of the switching valve is directly connected to the hydraulic oil port of the hydraulic cylinder, it is possible to reliably prevent the hydraulic oil from flowing out of the hydraulic cylinder.

The hydraulic cylinder is disposed vertically in the pit, and a pistonless type hydraulic oil port is provided near the upper end of the hydraulic cylinder. A switching valve can be arranged. Further, by providing the hydraulic oil port near the upper end of the hydraulic cylinder, it is easy to release air from the hydraulic cylinder.

On the other hand, when the pallet unit is located at the raised position, the switching valve is switched to the allowable mode.
At this time, back pressure is generated in the hydraulic cylinder due to the weight of the pallet unit. Therefore, the hydraulic oil in the hydraulic cylinder passes through the switching valve and is discharged by the back pressure. The discharged hydraulic oil is supplied to an oil tank of a hydraulic power source.

(2) In particular, the switching valve may be connected to the hydraulic cylinder so as to be disposed above the upper end of the pit. In this way, even when the pit is filled with water or the like, the switching valve does not submerge.

(3) The hydraulic power source connects a hydraulic power source port from which the pressure oil flows out to the hydraulic cylinder side or a hydraulic oil is returned from the hydraulic cylinder side, and a discharge port of the hydraulic pump. A main hydraulic line, a tank line branched from the main hydraulic line and connected to the oil tank, a throttle valve arranged in series with the tank line, and an allowance mode and tank for allowing a flow of hydraulic oil in the tank line A second switching valve capable of switching to a regulation mode for regulating the flow of hydraulic oil in the line.

With this configuration, the second switching valve is set to the regulation mode, and then the hydraulic oil is supplied from the hydraulic pressure source. That is, the pressure oil discharged from the discharge port of the hydraulic pump flows out of the hydraulic pressure source port via the main hydraulic line and is supplied to one of the first port and the second port of the switching valve. At this time, since the second switching valve is in the regulation mode,
The pressurized oil is not returned to the oil tank via the tank line. Then, when the switching valve is switched to the allowable mode,
The pressure oil flows between the two ports and is fed into the hydraulic cylinder, and the cylinder rod extends. That is, the pallet unit is raised.

When the pallet unit rises to the predetermined rising position, the switching valve is switched to the regulation mode, whereby the outflow of hydraulic oil from the hydraulic cylinder is regulated, and the pallet unit is held at the rising position. Moreover,
Since one of the first port and the second port of the switching valve is directly connected to the hydraulic oil port of the hydraulic cylinder, it is possible to reliably prevent the hydraulic oil from flowing out of the hydraulic cylinder.

On the other hand, when the pallet unit is located at the raised position, the switching valve and the second switching valve are each switched to the allowable mode. At this time, back pressure is generated in the hydraulic cylinder due to the weight of the pallet unit,
Due to this back pressure, hydraulic oil in the hydraulic cylinder passes through the switching valve and is discharged. The discharged hydraulic oil is supplied to the tank line from the hydraulic pressure source port. Then, since the second switching valve is in the allowable mode, the hydraulic oil is directly sent to the oil tank. Moreover, since a throttle valve is arranged in the tank line, the hydraulic oil passing through the tank line is throttled by the throttle valve and is slowly fed to the oil tank. That is, the pallet unit can be gradually lowered.

(4) The switching valve and the second switching valve may be constituted by electromagnetic switching valves, whereby there is an advantage that the switching of these valves can be easily performed by remote control or the like.

[0025]

Embodiments of the present invention will be described below.

FIG. 1 is a hydraulic system diagram showing the structure of an elevator for mechanical parking equipment according to an embodiment of the present invention (hereinafter simply referred to as “elevator”).

The elevating device 20 includes a pallet unit 2
The present invention is applied to a mechanical parking facility of a type in which the pits 23 and the pits 23 are moved up and down in the direction of an arrow 28. The pallet units 21 and 22 are pallets (not shown) for loading vehicles, which are arranged in a plurality of stages while being vertically separated from each other. Pallet unit 2
The pallet unit 1 is moved forward and backward with respect to the pit 23 by hydraulic cylinders 24 and 25 described later, and the pallet unit 22 is moved forward and backward with respect to the pit 23 by hydraulic cylinders 26 and 27 described later. I have. Then, by positioning the desired pallet at the vehicle entry level G, the vehicle can enter and exit the pallet.

In this embodiment, the mode in which the pallet unit 21 is constituted by a plurality of pallets is described. However, the present invention is not limited to this, and the pallet unit may be constituted by a single pallet.

Next, the structure of the lifting device 20 will be described.

The elevating device 20 includes a required bracket 29,
Hydraulic cylinders 24 and 25 connected to pallet unit 21 via
And hydraulic cylinders 26 and 27 connected to the pallet unit 22 through required brackets 29 and 30 to support the pallet unit 21 up and down.
Hydraulic source 31 that supplies hydraulic oil to hydraulic cylinders 4 to 27 and receives hydraulic oil returned from hydraulic cylinders 24 to 27.
And electromagnetic switching valves 32 to 35 connected to the hydraulic cylinders 24 to 27, respectively. Each of the electromagnetic switching valves 32 to
The hydraulic pressure source 31 and the hydraulic pressure source 31 are connected by hydraulic hoses H1 to H4, but a steel pipe may be used instead of the hydraulic hose.

The hydraulic cylinder 24 is of a so-called pistonless type, and the flow of hydraulic oil into and out of the cylinder tube is performed through a single hydraulic oil port 36. Here, the “pistonless type” refers to a type in which a tube side and a rod side in a cylinder communicate with each other.

As shown in FIG.
Is provided near the upper end of the hydraulic cylinder 24. Also, regarding the hydraulic cylinders 25 to 27, the hydraulic cylinder 2
4, each having a single hydraulic oil port 3
7 to 39. Further, the hydraulic cylinders 24 are arranged along the vertical direction, and the pallet units 21 and 22
Is designed to be raised and lowered directly.

In this embodiment, each of the hydraulic cylinders 24-2
7 is arranged in the pit 23, and is installed with the cylinder rod facing upward. Although the cylinder rod and the pallet units 21 and 22 are connected by the brackets 29 and 30, the cylinder tube and the pallet units 21 and 22 may be connected with the cylinder rod facing downward. However, when the cylinder rod is directed downward, the hydraulic oil ports 36 to 39
Is required to be provided on the base end side of the cylinder tube which is substantially closer to the upper end of the hydraulic cylinder (on the side opposite to the side where the cylinder rod advances and retreats).

The electromagnetic switching valve 32 has a first port 40 and a second port 41, and can switch between an A mode (regulation mode) and a B mode (permissible mode). In this embodiment, the electromagnetic switching valve 32 is directly connected to the hydraulic cylinder 24 so that the second port 41 coincides with the hydraulic oil port 36 of the hydraulic cylinder 24.
And the hydraulic oil port 36 can be connected so as to coincide with each other.

The mode switching of the electromagnetic switching unit 32 will be described in detail. In the mode (A mode) shown in the drawing, the flow of hydraulic oil between the first port 40 and the second port 41 is regulated. ing. When the mode is switched from the A mode to the B mode, the flow of the hydraulic oil between the first port 40 and the second port 41 is allowed. That is, in the A mode, the inflow / outflow of the hydraulic oil to / from the hydraulic cylinder 24 is regulated, and in the B mode, the inflow / outflow of the hydraulic oil is allowed. Switching between the A mode and the B mode is performed by operating a spool (not shown) provided in the electromagnetic switching valve 32 with an electromagnetic force by a solenoid.

In this embodiment, a pair of check valves are arranged to face each other in order to regulate the flow of hydraulic oil in the A mode. However, instead of this, the first port 40 and the second port 41 are connected. It is also possible to adopt a piping configuration that completely shuts off.

The electromagnetic switching valves 33 to 35 have the same configuration as the electromagnetic switching valve 32.
The second ports 41 of the hydraulic cylinders 25 to
27 are connected so as to coincide with the hydraulic oil ports 37 to 39. In addition, about each electromagnetic switching valve 33-35,
Similarly to the electromagnetic switching valve 32, each of the first ports 40 and the hydraulic oil ports 37 to 39 can be connected so as to match.

Therefore, each of the electromagnetic switching valves 33 to 35 is A
When the mode is set, the hydraulic cylinders 25 to 2
The inflow / outflow of hydraulic oil to / from the outlet 7 is regulated, and the inflow / outflow of hydraulic oil in the B mode is allowed. Also, as a result of the respective electromagnetic switching valves 32 to 35 being directly connected to the hydraulic oil ports 36 to 39 of the respective hydraulic cylinders 24 to 27,
To 35 are arranged above the pit 23.
The effect of this will be described later.

In this embodiment, each electromagnetic switching valve 32
Although 35 is adopted, this may be a manual switching valve.

The hydraulic source 31 includes an oil tank 42, a hydraulic pump 43, a main hydraulic line 44 connected to the hydraulic pump 43, a tank line 45 branched from the main hydraulic line 44 and connected to the oil tank 42. And a relief valve 46 as a safety valve.

The hydraulic pressure source 31 can be configured as a unit. One end of the main hydraulic pressure line 44 allows pressure oil to flow out to the hydraulic cylinders 24 to 27, and operates from the hydraulic cylinders 24 to 27. It is configured as a hydraulic pressure source port 47 from which oil is returned. The other end of the main hydraulic line 44 is connected to a discharge port 48 of the hydraulic pump 43.

The hydraulic pump 43 is driven by a motor 49, draws hydraulic oil from an oil tank 42, and discharges it from a discharge port 48 as pressure oil of a predetermined pressure. The hydraulic pump 43 is provided with a strainer 50 to prevent dust and the like from being sucked.

The main hydraulic line 44 is provided with a check valve 51 so that only the flow of hydraulic oil from the discharge port 48 of the hydraulic pump 43 to the hydraulic source port 47 is allowed.

A throttle valve 52, an electromagnetic switching valve 53 (second electromagnetic switching valve) and a strainer 54 are provided in the tank line 45.
Are arranged in series. The throttle valve 52 is of a variable type. The electromagnetic switching valve 53 has the same configuration as the above-described electromagnetic switching valves 32 to 35, and can be switched to the A mode or the B mode (the mode shown in the drawing). Therefore, when the electromagnetic switching valve 53 is in the A mode,
When the flow of the hydraulic oil in the tank line 45 is regulated and the mode is switched to the B mode, the flow of the hydraulic oil in the tank line 45 is allowed. Incidentally, instead of the electromagnetic switching valve 53,
A manual switching valve may be employed.

Next, the operation of the lifting device 20 according to the present embodiment will be described together with the operation and effect of each part.

First, the pallet units 21 and 22 are arranged in the pit 23. When the pallet units 21 and 22 are raised, the following is performed.

The hydraulic pump 43 is driven by operating the motor 49 of the hydraulic power source 31. Thereby, pressure oil is discharged from the hydraulic pump 43, and this pressure oil opens the check valve 51,
The oil flows out of the oil pressure source port 47 through the main oil pressure line 44. This pressure oil is supplied to the first ports 40 of the electromagnetic switching valves 32-35. At this time, the electromagnetic switching valve 53 is set to the A mode, and the flow of the hydraulic oil in the tank line 45 is regulated.

Next, when each of the electromagnetic switching valves 32-35 is switched to the B mode, the above-mentioned pressure oil is applied to each of the electromagnetic switching valves 32-35.
Flows between the first port 40 and the second port 41, and is fed into the hydraulic cylinders 24 to 27, and the cylinder rod extends. Thereby, the pallet units 21 and 22 are raised. In this state, the motor 49 is stopped to stop the supply of the pressure oil.

When the pallet units 21 and 22 are raised to a predetermined raised position and the operation of the motor 49 is stopped, the electromagnetic switching valves 32 to 35 are switched to the A mode, whereby the operation from the hydraulic cylinders 24 to 27 is performed. The outflow of oil is restricted, and the pallet units 21 and 22 are held at the raised position. Here, since the second ports 41 of the electromagnetic switching valves 32 to 35 are directly connected to the hydraulic oil ports 36 to 39 of the hydraulic cylinders 24 to 27, each hydraulic cylinder 2
The outflow of hydraulic oil from 4 to 27 can be reliably prevented. As a result, the pallet units 21 and 22
Is stably held in the raised position without tilting. Moreover, there is no need to separately provide a device for preventing the pallet units 21 and 22 from dropping due to the outflow of hydraulic oil as in the related art.

Also, as described above, the electromagnetic switching valves 32 to 35
Is located above the pit 23, so if the pit 2
Even if water or the like enters the inside of the solenoid valve 3, the electromagnetic switching valve 32
~ 35 are not damaged. Further, since the hydraulic oil ports 36 to 39 to which the electromagnetic switching valves 32 to 35 are connected are provided near the upper ends of the hydraulic cylinders 24 to 27,
Air bleeding in the hydraulic cylinders 24 to 27 is facilitated, and as a result, there is no need to provide a separate air bleeding valve as in the related art.

Next, when returning the pallet units 21 and 22 from the raised position to the inside of the pit 23, the following is performed.

The electromagnetic switching valves 32 to 35 are switched to the B mode. At this time, back pressure is generated in the hydraulic cylinders 24 to 27 due to the weight of the pallet units 21 and 22.
Therefore, the hydraulic oil in the hydraulic cylinders 24 to 27 is discharged through the electromagnetic switching valves 32 to 35 by the back pressure. The discharged hydraulic oil is supplied from the hydraulic pressure source port 47 to the main hydraulic line 44, but flows to the tank line 45 as it is because the check valve 51 is disposed in the main hydraulic line 44.

At this time, the operating oil is returned to the oil tank 42 by switching the electromagnetic switching valve 53 to the B mode. However, since the throttle valve 52 is disposed in the tank line 45, the hydraulic oil passing through the tank line 45 is throttled by the throttle valve 52 and is slowly supplied to the oil tank 42. That is, the pallet units 21 and 22 can be gradually lowered. In addition, since the throttle valve 52 is a variable type, the downward speed of the pallet units 21 and 22 can be adjusted by adjusting this. However, this throttle valve 52
It is not necessary to adopt a variable type, and a fixed type may be used.

In the above description, in order to clarify the operation of the elevating device 20, the electromagnetic switching valves 32 to 35 and the electromagnetic switching valve 53 are separately operated. 53 can be operated in conjunction with each other as follows.

That is, when the pallet units 21 and 22 are raised, the electromagnetic switching valve 53 is set to the A mode, and the electromagnetic switching valves 32 to 3 are operated simultaneously with the operation of the motor 49.
5 is switched to the B mode. Thereby, the pallet units 21 and 22 are raised as described above. When the pallet units 21 and 22 are lowered, the electromagnetic switching valves 32 to 35 and 53 are simultaneously set to the B mode. Thereby, the hydraulic oil is slowly returned to the oil tank 42 as described above, and the pallet units 21 and
2 falls.

In this embodiment, the electromagnetic switching valves 32 to
Although 35 is arranged above the pit 23, it may be arranged above the upper end of the pit 23 (that is, above the vehicle entry level G). To do so, the hydraulic cylinders 24 to
What is necessary is just to lengthen the length of 27. In this way, even when the pit 23 is filled with water or the like, the electromagnetic switching valves 32 to 35 are not submerged, and are extremely resistant to flood damage.

In addition, in this embodiment, the electromagnetic switching valve 32
The adoption of ３５35 and ５３53 has the advantage that they can be easily switched by remote control or the like.

In the above-described embodiment, the lifting device 20 using the hydraulic pressure has been described. However, the present invention is not limited to this. In general, the lifting device 20 is constructed using the fluid pressure using the working fluid. You can also.

[0059]

As described above, according to the present invention, since the switching valve is directly mounted on the hydraulic cylinder without using a pipe, the switching of the switching valve reliably prevents the hydraulic oil from flowing out of the hydraulic cylinder. can do. Therefore, the pallet unit can be stably held at the raised position.

Further, by employing a pistonless type hydraulic cylinder, the hydraulic oil port can be provided near the upper end of the hydraulic cylinder, so that the air bleeding operation in the hydraulic cylinder is easy.

Further, since the air bleeding operation in the hydraulic cylinder is easy, there is no need to separately provide an air bleed valve as in the conventional case. Moreover, since there is no pipe between the switching valve and the hydraulic cylinder, the pallet unit does not fall due to damage to this pipe, and it is not necessary to provide a device for preventing the pallet unit from falling unlike the conventional case. As a result, the lifting device can have a simple structure.

In addition, by providing the hydraulic oil port near the upper end of the hydraulic cylinder, the switching valve can be disposed above the pit. Therefore, even if water or the like enters the pit, the switching valve can be switched. It is possible to prevent the valve from being submerged, and to provide a lifting device resistant to flood damage.

[Brief description of the drawings]

FIG. 1 is a hydraulic system diagram showing a configuration of a lifting device according to an embodiment of the present invention.

FIG. 2 shows a configuration of a conventional elevating device as a hydraulic system diagram.

[Explanation of symbols]

 Reference Signs List 20 Lifting device 21 Pallet unit 22 Pallet unit 23 Pit 24 Hydraulic cylinder 25 Hydraulic cylinder 26 Hydraulic cylinder 27 Hydraulic cylinder 31 Hydraulic source 32 Electromagnetic switching valve 33 Electromagnetic switching valve 34 Electromagnetic switching valve 35 Electromagnetic switching valve 36 Hydraulic oil port 37 Hydraulic oil port 38 Hydraulic Oil Port 39 Hydraulic Oil Port 40 First Port 41 Second Port 42 Oil Tank 43 Hydraulic Pump 44 Main Hydraulic Line 45 Tank Line 47 Hydraulic Power Port 48 Discharge Port 52 Throttle Valve 53 Electromagnetic Switching Valve

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H089 AA74 BB15 BB28 CC06 CC13 DA02 DA14 DB03 DB05 DB13 DB44 DB48 EE31 JJ10

Claims (4)

[Claims] 1. A lifting device applied to a mechanical parking facility for lifting a pallet unit for loading a vehicle with respect to a pit, wherein the pallet unit is disposed in the pit along a vertical direction. A piston-less type hydraulic cylinder that supports up and down, an allowance mode that has a first port and a second port, and allows a flow of hydraulic oil between both ports, and a regulation mode that restricts the flow of hydraulic oil between both ports Can be switched to
A switching valve having one of a port and a second port directly connected to a hydraulic oil port provided near an upper end of the hydraulic cylinder; a hydraulic oil tank and a hydraulic oil having a predetermined pressure by sucking hydraulic oil from the oil tank. And supplies hydraulic oil to one of the first port and the second port and supplies hydraulic oil returned from the other of the first port and the second port. An elevating device for mechanical parking equipment, comprising: a hydraulic pressure source for feeding an oil tank. 2. The lift device for a mechanical parking facility according to claim 1, wherein the switching valve is connected to the hydraulic cylinder so as to be disposed above an upper end of the pit. Lifting device for mechanical parking equipment. 3. The elevating device for a mechanical parking facility according to claim 1, wherein the hydraulic source is such that the hydraulic oil flows out to the hydraulic cylinder side or the hydraulic oil returns from the hydraulic cylinder side. A main hydraulic line connecting a port and a discharge port of the hydraulic pump, a tank line branched from the main hydraulic line and connected to the oil tank, a throttle valve arranged in series with the tank line, and a tank. A second switching valve capable of switching between an allowance mode for permitting a flow of hydraulic oil in the line and a regulation mode for restricting the flow of hydraulic oil in the tank line; apparatus. 4. The lift device for a mechanical parking facility according to claim 1, wherein said switching valve and said second switching valve are constituted by electromagnetic switching valves. Lifting device for parking system.