JP2876917B2 - Multi-level parking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-story parking device which can smoothly lower a pallet.

[0002]

2. Description of the Related Art Conventionally, as a multi-story parking device, there is one in which a pallet mounted on a vehicle supported by a column is raised and lowered by a hydraulic cylinder for lifting and lowering (see Japanese Utility Model Laid-Open No. 2-125155). The operation of raising and lowering the pallet is usually performed by operating a button switch.

In this multi-story parking device, a locking lever is provided near the rising end of the pallet in order to prevent the pallet from being accidentally lowered due to a failure of the lifting hydraulic cylinder or the like. With this, the pallet is mechanically locked. When the pallet is locked by the locking lever, it is necessary to release the locking of the pallet by the locking lever before lowering the pallet.

[0004]

However, since the load of the pallet and the vehicle mounted on the pallet is applied to the locking lever, it is difficult to release the locking lever with a solenoid or the like. There are many. For this reason, in the above-mentioned conventional device, when the locking by the locking lever is not released, the operator first operates the pallet raising button switch to lower the pallet from its raised end position before lowering the pallet. It was necessary to raise it slightly and remove the load on the locking lever. And
After unlocking the locking lever with a solenoid, etc.,
This time, the pallet is lowered by operating the button switch for lowering the pallet, so that there is a problem that the lowering operation of the pallet is very troublesome.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-story parking device in which a pallet lowering operation can be performed easily and smoothly.

[0006]

In order to achieve the above object, a multi-story parking device of the present invention, as illustrated in FIGS. 1 to 4, moves a pallet 2 mounted on a vehicle between an upper end and a lower end. Lifting means 6 for raising and lowering, a raising switch 19 and a lowering switch 20 operated by an operator for raising and lowering the lifting means 6, and a lock for locking the pallet 2 at the raising end. A member 26, an unlocking member 23 for unlocking the locking member 26 prior to the start of the lowering operation of the elevating means 6 when the lowering switch 20 is operated, and the lowering switch When the lowering device 20 is operated, prior to the start of the lowering operation of the lifting / lowering means 6, an unlocking detecting means 22 for detecting whether or not the locking member 26 is unlocked, and before the lowering operation of the lifting / lowering means 6 starts. ,Up When the lock release detecting means 22 detects that the lock releasing member 23 is not unlocked by the lock release member 23, the lock release detecting means 22 can be operated without operating the lifting operation switch 19. Until the locking member 26 detects the unlocking of the locking member 26, the pallet 2
And control means 21 for controlling the elevating means 6 so as to raise the height.

[0007]

According to the present invention, in the state where the pallet 2 is locked at the rising end by the locking member 26, the lifting / lowering means 6 is operated so as to lower the pallet 2 by operating the lowering switch 20 (see FIG. 1). In this case, hereinafter, prior to the start of the lowering operation of the lifting / lowering means 6, when the unlocking detecting means 22 detects that the locking member 26 is not unlocked, the control means 21 Operates the lifting / lowering means 6 to raise the pallet 2 (hereinafter referred to as lifting operation). As a result, the pallet 2 is lifted, and the load on the locking member 26 is removed.
The lock release member 23 causes the lock member 26 to be unlocked.

When the unlocking of the locking member 26 is detected by the unlocking detecting means 22, the raising operation of the elevating means 6 is stopped by the control means 21, and thereafter the elevating means 6 is lowered. And the pallet 2 descends.

As described above, when the lock of the pallet 2 by the locking member 26 is not released when the pallet 2 is lowered, the pallet 2 is automatically raised by the operation of the control means 21 until the lock is released. Therefore, the operator does not need to perform an operation for raising the pallet 2 as in the related art, and the operator only has to operate the switch 20 for lowering operation. Therefore, the operation of lowering the pallet 2 can be performed easily and smoothly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIG. 2 and FIG.
A pallet 2 mounted on a vehicle is supported to be able to move up and down. Pulleys 3, 3, and 3 are attached to both left and right sides of the pallet 2, and a synchronous chain 4 is attached to each of the pulleys 3, 3, and 3.
Is being wrapped around. One end of the synchronization chain 4 is fixed to the lower end of the left column 1 and the other end is fixed to the upper end of the right column 1. A lower end of a suspension chain 5 whose upper end is fixed to an upper end of the left column 1 is fixed to the pulley 3 on the left side. Is hung.

When the lifting / lowering hydraulic cylinder 6 moves forward (downward movement), the lower end of the suspension chain 5 is lowered, and the pallet 2 descends. The lower end of the chain 5 is raised, and the pallet 2 is raised.

As shown in FIG. 6, the lifting hydraulic cylinder 6 is connected to a hydraulic unit 8. The hydraulic unit 8 includes a variable hydraulic pump 1 driven by an electric motor 9.
0, a check valve 11, a descending solenoid valve 12, and a lifting solenoid valve 1
3 and a tank 14. Reference numeral 30 denotes a flow control valve.

FIG. 6 shows a state in which the hydraulic cylinder 6 for raising and lowering is moved back and the pallet 2 is raised to its raised end.
When the motor 9 is turned off and the elevating electromagnetic valve 13 and the descending electromagnetic valve 12 are turned on, the lifting hydraulic cylinder 6 is loaded by the load of the pallet 2 (or the load of the vehicle if the vehicle is mounted on the pallet 2). The oil in the rod side chamber 6a is discharged to the tank 14, so that the lifting hydraulic cylinder 6 moves forward and the pallet 2 is lowered to its lower end.

Conversely, when the lifting hydraulic cylinder 6 moves forward and the pallet 2 is lowered, the electric motor 9 is turned on, the lifting electromagnetic valve 13 is turned on, and the descending electromagnetic valve 12 is turned off. Since oil is supplied from the pump 10 to the rod side chamber 6a of the hydraulic cylinder 6 for elevation, the hydraulic cylinder 6 for elevation is moved back and the pallet 2 is raised.

As shown in FIG. 2, the post 1 has a rising end limit switch 15 for detecting that the pallet 2 is located at the rising end thereof, and the pallet 2 is located at the falling end thereof. End limit switch 1 for detecting
6 is provided on the operation panel 18 as shown in FIG.
An up push button switch 19 and a down push button switch 20 are provided. The rising end limit switch 15 is turned off when the pallet 2 starts lowering from the rising end position, and the lower end limit switch 16 is turned off when the pallet 2 starts rising from the lower end.

A control panel (CPU) 2 is provided beside the column 1.
As shown in FIG. 1, the switches 15, 16, 19, 20, the solenoid valves 12,
13 and the electric motor 9 are connected. Further, an unlocking limit switch 22 and an unlocking solenoid 2 described later are used.
3 is also connected to the control panel 21.

As shown in FIGS. 3 and 4, on the brackets 1a, 1a fixed to the column 1 near the rising end position of the pallet 2, a locking lever 26 is swingably supported by a pin 27. The plunger 23a of the lock release solenoid 23 is connected to the lock lever 26. When the lock release solenoid 23 is not operated, the plunger 23a is extended, and the lock lever 26 swings to the lock position shown by the solid line in FIG. Thus, at the rising end of the pallet 2, the locking lever 26 engages with the lower surface 2c of the suspension bracket 2a of the pallet 2 to hold the pallet 2 at the rising end. In addition, the unlocking solenoid 23
Is operating, the plunger 23a is contracted, and the locking lever 26 is swung by the plunger 23a to the unlocked position shown by the two-dot chain line in FIG. Release the engagement with.

The column 1 is provided with the locking lever 2 near the bracket 1a for supporting the locking lever 26.
An unlocking limit switch 22 is provided as unlocking detection means that is turned on when the shutter 6 swings to the unlocking position.

The motor 9, the solenoid valves 12, 13 and the unlocking solenoid 23 are controlled by the control panel 21 as follows. This will be described with reference to the flowcharts of FIGS. Note that the flowcharts of FIGS. 7 and 8 are a series of flowcharts, and are connected by a, b, and c in each of the drawings.

When the up push button switch 19 is turned on (operated) in step S1, it is determined in step S2 whether the up push button switch 19 is in the on (activated) state. If YES, the up push button switch 19 is raised in step S3. It is determined whether or not the end limit switch 15 is on (operating). If “YES” in the step S3, the pallet 2 has already been raised to the rising end, and therefore, in a step S4, the lift electromagnetic valve 13
Then, the motor 9 is turned off, and the ascending operation is automatically stopped in step S5.

If NO in step S3, that is, if the ascending end limit switch 15 is not operated, the pallet 2 has not yet started to ascend, and the ascending / descending solenoid valve 13 and the electric motor 9 are turned on in step S6. As a result, the lifting hydraulic cylinder 6 starts to return, the lifting operation of the pallet 2 is started in step S7, and the lower limit switch 16 is turned off in step S8.

Then, the process returns from step S8 to step S2, and if YES in step S3, that is, if it is determined that the rising end limit switch 15 is operated, the pallet 2
Has risen to the rising end position, the elevation solenoid valve 13 and the electric motor 9 are turned off in step S4, and the elevation operation is automatically stopped in step S5.

On the other hand, when the down push button switch 20 is turned on (operated) in step S11, it is determined in step S12 whether or not the down push button switch 20 is in the on (operated) state. It is determined whether or not the descending end limit switch 16 is ON (operating). If YES, the pallet 2 has already descended to the descending end, so the lifting solenoid valve 13
Then, the descending solenoid valve 12 is turned off, and the descending operation is automatically stopped in step S15.

If NO in step S13, that is, if it is determined that the lower end limit switch 16 is not operated, the process proceeds to step S16, and the upper end limit switch 1
It is determined whether or not 5 is still on. If it is determined that the rising end limit switch 15 is not in the ON state, this means that the pallet 2 has already started to lower, and whether the lower end limit switch 16 has been turned on again in step S13. Judge whether or not.

On the other hand, when it is determined in step S13 that the ascending end limit switch 15 is in the ON state, this means that the pallet 2 has not yet started descending and the locking lever 26 is in the locked position. In step S18, the unlocking solenoid 23 is operated.
The operation of the lock release solenoid 23 causes the lock lever 26 to swing to the lock release position, and the lock release limit switch 2
2 turns on (operates). Therefore, in the next determination step S18, it is determined that the lock release limit switch 22 is in the ON state, and in the next step S19, the elevating electromagnetic valve 13 and the descending electromagnetic valve 12 are turned on, and the electric motor 9 is turned off. As a result, the lifting hydraulic cylinder 6 moves forward, and the lowering operation of the pallet 2 is started in step S20.

Then, in step S21, the rising end limit switch 15 is turned off, and the process returns to step S12. If YES in step S13, that is, if it is determined that the descending end limit switch 16 is operating, the pallet 2 has finished descending.
3 and the descending electromagnetic valve 12 are turned off, and the descending operation is automatically stopped in step S15.

If the unlocking solenoid 23 is turned on in step S17, the unlocking lever 26 swings to the unlocking position, and the unlocking limit switch 22 should turn on. However, when the load of the pallet 2 (the load of the vehicle is also applied to the pallet 2 if the vehicle is loaded) is applied to the locking lever 26, the locking lever 26 operates the unlocking solenoid 23. Occasionally the power does not swing to the unlocked position.

In such a case, it is determined in step S whether or not the lock release limit switch 22 is ON (operated).
Since the answer at 18 is NO, the process proceeds to step S22, in which the lifting / lowering electromagnetic valve 13 and the electric motor 9 are turned on, the lifting / lowering hydraulic cylinder 6 is moved back, and the pallet 2 is raised in step S23.

As a result, the load applied to the lock lever 26 is removed, and the lock lever 26 swings to the lock release position by the action of the lock release solenoid 23 which is already turned on, and The stop release limit switch 22 is turned on. Then, in step S19, the descending solenoid valve 12 is turned on and the electric motor 9 is turned off in addition to the already-turned up / down solenoid valve 13, so that the ascent operation of the pallet 2 is stopped, and in step S20 The lowering operation of the pallet 2 is started. Then, the rising end limit switch 15 is turned off in step S21. Subsequently, the process returns from step S21 to step S12, and in step S13, Y
If the ES, that is, the lower limit switch 16 is in the ON state, it means that the pallet 2 has finished descending.
The elevating electromagnetic valve 13 and the descending electromagnetic valve 12 are turned off in step S14, and the descending operation is automatically stopped in step S15.

In step S2, it is determined whether or not the up push button switch 19 is turned on.
It is determined whether or not the down push button switch 20 is turned on in step S2. If the answer is NO, the push button switches 19 and 20 are turned off while the pallet 2 is being lifted or lowered. Alternatively, the descending operation is interrupted. Then one of the push button switches 1
Until the button 9 or 20 is operated again, the routine of step S25 and step S26 is repeated to determine whether the pressure-up button switch 19 is on or the pressure-down button switch 20 is on.

[0031]

As is apparent from the above description, the multi-story parking device of the present invention lowers the elevating means by operating the lowering switch when the pallet is locked at the rising end by the locking member. Prior to the start of the lowering operation of the elevating means, when the unlocking detection means detects that the locking member is not unlocked, the control means releases the locking of the locking member. The lifting means is automatically raised until the lock release detecting means detects the above.

Therefore, when the lock of the pallet by the locking member is not released when lowering the pallet,
The pallet is automatically raised until the lock is released by the operation of the control means, so that the operator himself does not need to perform an operation for raising the pallet 2 as in the related art. All that is required is to operate the activation switch.
That is, in the conventional case, when the operator does not lower the pallet because the locking lever does not come off even when the lowering operation switch is operated, the operator operates the raising operation switch to raise the pallet and lock the pallet. Although it was necessary to operate the lowering switch again after confirming that the lever was released, according to the present invention, it is only necessary to operate the lowering switch once. As described above, according to the present invention, the pallet lowering operation can be performed easily and smoothly.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control circuit for a multistory parking device of the present invention.

FIG. 2 is a side view of the multi-story parking device according to one embodiment of the present invention.

FIG. 3 is a plan view showing a locking portion between a pallet and a support in the multi-story parking device.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a perspective view of a pallet elevating device in the multi-story parking device.

FIG. 6 is a hydraulic circuit diagram for raising and lowering a pallet in the multi-story parking device.

FIG. 7 is a left half mounting diagram of a control flowchart.

FIG. 8 is a right half mounting diagram of a control flowchart.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support | pillar, 1a ... Bracket, 2 ... Pallet, 2a ... Suspension bracket, 2c ... Lower surface of a suspension bracket, 6 ... Hydraulic cylinder for raising / lowering, 8 ... Hydraulic unit, 9 ... Electric motor, 10
... variable hydraulic pump, 12 ... descending solenoid valve, 13 ... elevating solenoid valve, 15 ... rising end limit switch, 16 ... falling end limit switch, 19 ... up push button switch, 20 ...
Down push button switch, 21 ... Control panel (CPU), 2
2 ... unlocking limit switch, 23 ... unlocking solenoid, 23a ... plunger, 26 ... locking lever, 27 ...
pin.

Claims (1)

(57) [Claims] 1. A lifting means (6) for raising and lowering a pallet (2) mounted on a vehicle between a rising end and a lower end, and a lifting mechanism operated by an operator to raise and lower the lifting means (6). An operating switch (19) and a lowering switch (20); a locking member (26) for locking the pallet (2) at the upper end; and a lowering switch (20) being operated. An unlocking member (23) for unlocking the locking member (26) prior to the start of the lowering operation of the lifting / lowering means (6).
When the lowering switch (20) is operated, prior to the start of the lowering operation of the lifting / lowering means (6), an unlocking detection means for detecting whether or not the locking member (26) is unlocked. (22) Prior to the start of the lowering operation of the lifting / lowering means (6), the lock release detecting means detects that the lock release member (23) has not released the lock member (26). (2
When 2) is detected, the switch for raising operation (19)
Control for controlling the lifting / lowering means (6) to raise the pallet (2) until the unlocking detection means (22) detects the unlocking of the locking member (26) without the above operation. A multi-story parking device comprising: means (21).