JPH071469Y2 - Multi-level parking device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) [0001] The present invention relates to a multi-story parking apparatus having a pallet for mounting a vehicle and moving up and down so that another vehicle can be parked in the space below the raised pallet. .

(Prior Art) This type of multi-level parking device is provided with one electromagnetic brake associated with the lifting device in order to lift the pallet by a lifting device equipped with a motor and stop the pallet in a raised position or a lowered position. Has been.

(Problems to be solved by the invention) In such a three-dimensional parking apparatus, the lowering stop position is set slightly above the position where the pallet comes into contact with the fixed portion such as the foundation surface,
When lowering the pallet, the lower limit detection switch, which operates slightly before the lowering stop position, stops the operation of the lifting device and the electromagnetic brake to stop the pallet before it comes into contact with the fixed portion. . However, in such a conventional technique, when the electromagnetic brake fails and does not operate, the pallet may collide with the fixed portion in a shocking manner to damage the multi-story parking apparatus or the mounted vehicle.

The present invention aims to solve such problems.

(Means for Solving the Problem) For this purpose, the three-dimensional parking apparatus according to the present invention is provided between a fixed frame body 10 having a plurality of vertical standing members 11 and each standing member 11, as illustrated in the accompanying drawings. A pallet 15 for loading vehicles and multiple bearings on either side of this pallet.
In a multi-level parking apparatus comprising an elevating device 20 that supports 18 and elevates and lowers each of the supporting portions along the upright member 11, even if only a part of the parking device is provided in association with the elevating device 20. A plurality of electromagnetic brakes 26 having a capacity for preventing the pallet 15 on which the vehicle is mounted from descending, and the plurality of electromagnetic brakes from a position where the pallet 15 on which the vehicle and the descending pallet 15 come into contact with a fixed portion such as a foundation surface A lower limit detection switch 35 that activates when a position slightly higher than the stop distance due to a part of 26 reaches a position above, and simultaneously activates the electromagnetic brakes 26, and The pallet 15 is characterized by including overshoot determination means 30 for activating the alarm device 41 when the amount of overshoot until the pallet 15 reaches a predetermined value or more. .

(Operation) If the lower limit detection switch 35 operates while the pallet 15 is descending, the electromagnetic brake 26 operates and the pallet 15 stops.
When all of the electromagnetic brakes 26 are operating normally, the amount of overshoot from the operation of the lower limit detection switch 35 to the stop of the pallet 15 is smaller than a predetermined value, and the pallet 15 has a lower limit. The detection switch 35 slightly overshoots from the operated position and stops in the vicinity of a predetermined descending stop position, and the overshoot determination means 30 does not operate. When a part of the plurality of electromagnetic brakes 26 fails, the overshoot amount becomes equal to or more than a predetermined value, and therefore the vehicle stops after passing the descending stop position, and the overshoot determination means.
30 activates the alarm 41. However, the pallet 15 does not collide with a fixed portion such as the foundation surface.

(Effects of the Invention) As described above, according to the present invention, an alarm is issued to warn of an abnormality when a part of a plurality of electromagnetic brakes fails, and at this stage, the pallet collides with a fixed part such as a foundation surface. There is nothing to do. Therefore, it is possible to detect a failure in advance and repair it before such a collision occurs, and it is possible to prevent damage to the multi-story parking apparatus or the mounted vehicle due to the collision.

(Embodiment) First, the present invention will be described with reference to a first embodiment shown in FIGS.

As shown mainly in FIG. 1 and FIG. 2, the fixed frame body 10 of the multi-level parking apparatus has four columns (standing members) 11 as main constituent members, and each column 11 faces two by two. The lower end is erected and fixed on the foundation surface G by a foundation bolt (not shown) via the leg plate 12. The upper part of each left and right column 11
They are connected to each other by a reinforcing member 13. One of the columns 11 is provided with an operating device 40 for operating the multi-level parking device.

A pallet 15 on which a vehicle V is mounted is supported between the columns 11 so as to be able to move up and down between a raised position A and a lowered position B shown in FIG. The pallet 15 is composed of a main body 16 and two treads 17, and each tread 17 is supported by an L-shaped metal fitting 16a fixed to the front and rear ends of the main body 16 and a support shaft 19 so as to be able to swing up and down at a slight angle. , Is regulated by a stopper (not shown) so as not to face downward by a predetermined angle (for example, 10 degrees). Supporting portions (brackets) 18 supported by an elevating device 20 described below are provided at two locations on the left and right of the main body 16 so as to project therefrom. The support portion 18 may be formed by a part of the main body 16.

Next, the lifting device 20 will be described. As shown in FIGS. 1 and 2, a ball nut is attached to each bracket 18 of the pallet 15.
The pallet 15 is supported by supporting the ball nut 21 so that it can rotate only around the vertical axis, and by screwing the ball nuts 21 into the screw shafts 22 that are vertically rotatably suspended in the columns 11. Each ball nut 21 is interlocked with each other by an interlocking device 23 formed of a plurality of bevel gear boxes 23a and an interlocking shaft 23b provided in the pallet 15, and a motor 25 driven by a battery 27.
Is rotatably driven by the toothed belt device 24, and thereby the pallet 15 is moved up and down in a horizontal state.

The lifting device 20 further includes two electromagnetic brakes 26 provided on the interlocking shaft 23b and a braking device 28 connected via a toothed belt device 24. Each electromagnetic brake 26 has the same structure in which it is deactivated by excitation and activated by demagnetization, and each one has a brake capacity that prevents the pallet 15 carrying the vehicle V from descending. A speed sensor 29 that detects the rotation speed of the interlocking shaft 23b is provided in a part of the interlocking device 23 that is close to one of the brackets 18. Although the number of the electromagnetic brakes 26 is two in this embodiment, the number of the electromagnetic brakes 26 may be three, or four or more, provided also in the portion shown by the chain double-dashed line in FIG.

As shown in FIGS. 3 and 4, one of the brackets 18 is provided with an abnormality detection switch 31 and a lower limit detection switch 35, and the abnormality detection cam member 32 and the lower limit detection switch are provided at the lower part of the column 11 correspondingly. The cam member 36 is fixed. In this embodiment, the abnormality detection switch 31 and the lower limit detection switch 35 are limit switches having the same structure.
32 and the lower limit detection cam member 36 are larger in height in the latter 36. The abnormality detection switch 31 constitutes an overshoot determination means 30 together with the abnormality detection cam member 32, and as shown in FIG. 5, a power source using an alarm device 41 such as an alarm lamp provided in the operation device 40 and a battery 27. Together with 45, it constitutes an alarm circuit. The alarm device 41 may be a buzzer instead of the alarm lamp.

When the pallet 15 is descending, both detection switches 31 and 35 are initially
Is inoperative, but when the pallet 15 reaches the predetermined position shown in FIG. 4 (a), the lever of the lower limit detection switch 35 is first detected.
The roller 35b at the tip of 35a contacts the lower limit detection cam member 36, and the lower limit detection switch 35 operates. This predetermined position is the pallet 15 on which the vehicle with the maximum loading weight of this multilevel parking system is mounted.
Above the position where the main body 16 of the pallet 15 comes into contact with the base surface G or a fixed portion such as a stopper by a distance that is slightly larger than the stop distance (for example, 24 mm) when only one electromagnetic brake 26 is used. It is located away from. When the lower limit detection switch 35 operates, the electronic control unit 50 (see FIG. 6) described later operates each electromagnetic brake 26.

When the pallet 15 further descends from the position shown in FIG. 4 (a) by a predetermined value and reaches the position shown in FIG. 4 (c), the roller 31b at the tip of the lever 31a of the abnormality detection switch 31. Comes into contact with the abnormality detection cam member 32, the abnormality detection switch 31 operates, and the alarm lamp 41 lights up. The above predetermined value is slightly larger than the stop distance (for example, 6.5 mm) when the pallet 15 having the vehicle with the maximum load weight is stopped by using both electromagnetic brakes 26, and the pallet 15 with no load is The distance is shorter than the stop distance (for example, 10 mm) when the vehicle is stopped using only the electromagnetic brake 26.

The electronic control unit 50 for controlling the operation of the multilevel parking system of the first embodiment includes a central processing unit (CPU) and a read-only memory (R).
OM) and a writable memory (RAM) as main constituent members, and as shown in FIG. 6, the motor 25 and both electromagnetic brakes 26 are connected through an interface and a driving device (both not shown), and an interface. Through lower limit detection switch 35, upper limit detection switch 38, up button
42 and the down button 43 are connected. The ascending button 42 and the descending button 43 are provided in the operation unit 40, and the upper limit detection switch 38 is provided in the pallet 15 and operates immediately before the ascending position A of the pallet 15. ROM of electronic control unit 50
A control program for controlling the operation of the multi-level parking device is stored in the RAM, and a flag and various variables described later are stored in the RAM. CPU has up button 42, down button 4
3, signals from the lower limit detection switch 35, the upper limit detection switch 38 and the like are input to perform a predetermined calculation and output to the motor 25 and the electromagnetic brake 26 and the like to control the operation of the multi-level parking device.

FIG. 7 and FIG. 8 are flowcharts of a control program for controlling the operation of the present multilevel parking system, and the operation of the first embodiment will be described below.

FIG. 7 is a flowchart of the main program. When the power switch (not shown) of the operation box 40 is turned on, the CPU starts the control operation shown in this flowchart. The CPU first sets the flag P to 0 in step 100,
The control operation proceeds to step 101. If neither the up button 42 nor the down button 43 is pressed, the CPU advances the control operation from Step 101 to Steps 102 and 103, and
The operation of returning to 101 is repeated, and the pallet
Neither rises nor falls.

If the up button 42 is pressed to switch on from this state, the CPU advances the control operation from step 101 to step 105, and repeats both steps 101 and 105. Although this operation is not directly related to the main part of the present invention, detailed description thereof will be omitted, but in step 105, the CPU operates the motor 25 to raise the pallet 15 and sets the flag P to 1. If the pallet 15 is raised to the position where the upper limit detection switch 38 is activated, or if the raising button 42 is released during the raising to switch it off, the CPU advances the control operation from step 101 or 105 to steps 103, 110 to 112, Stop powering to 25, operate electromagnetic brake 26 to stop pallet 15,
The control operation is returned to step 101 with the flag P set to 0,
The above-mentioned standby state is set.

If you press the down button 43 to switch it on, CP
U repeats steps 101, 102 and 106. The details of step 106 are as shown in the flowchart of FIG. 8. In step 200, the CPU first determines whether the pallet 15 is below the position shown in FIG. 4 (a) by operating the lower limit detection switch 35. to decide. If the lower limit detection switch 35 is not operated, the CPU advances the control operation to steps 201 to 204, releases the electromagnetic brake 26, starts the downward power supply to the motor 25 to lower the pallet 15, and sets the flag P to 1. The pallet lowering speed control of step 205 is performed, and the control operation is returned to step 101.

If the down button 43 is kept pressed, the CPU repeatedly operates according to the flowcharts of FIGS. 7 and 8, and at this time P = 1, so the control operation skips from step 201 to step 205 and returns to step 101. , The pallet 15 continues to descend. Step 205 is for keeping the descending speed of the pallet 15 within a predetermined range, and the CPU supplies power to the motor 25 if the rotation speed of the interlocking shaft 23b detected by the speed sensor 29 becomes higher than a predetermined upper limit value. Is stopped and the braking force of the braking device 28 utilizing the eddy current is increased, and if this rotation speed is smaller than a predetermined lower limit value, the braking force of the braking device 28 is reduced or power is supplied to the motor 25. To do. When the pallet 15 is lowered to the position where the lower limit detection switch 35 shown in FIG. 4 (a) operates, the CPU advances the control operation from step 200 to steps 103, 110 to 112 in FIG. If it is, the power supply is stopped, the electromagnetic brake 26 is operated to stop the pallet 15, and the flag P is set to 0.
Then, the control operation is returned to step 101, and the standby state described above is established.

When both of the two electromagnetic brakes 26 are operating normally, the amount of overshoot from the activation of the lower limit detection switch 35 to the stop of the pallet 15 is small (for example, 4.5 when the pallet 15 is unloaded). mm, about 6.5 mm for maximum load), and the pallet 15 stops at the lowered position B in FIG. In this state, as shown in FIG. 4 (b), the lower limit detection switch 35 operates, but the abnormality detection switch 31 does not operate, so that the alarm lamp 41 does not light up, and the footboards 17 are greatly downward and the tip ends thereof. Is in contact with the base plane G.

Further, when one of the two electromagnetic brakes 26 fails and becomes ineffective, the amount of overshoot from activation of the lower limit detection switch 35 to stop of the pallet 15 becomes large (for example, the pallet 15 has no load). 10 mm in the case of, and about 24 mm in the case of the maximum load), the pallet 15 stops at the abnormal lowering position C in FIG. Since the amount of overshoot in this state is larger than the distance between the positions where both detection switches 31 and 35 operate, the abnormality detection switch 31 shown in FIG.
Also stops at the abnormal lowering position C shown in FIG. This turns on the alarm lamp 41, but the pallet
The main body 16 of 15 is slightly above contact with a fixed portion such as the base surface G, and each tread 17 swings slightly upward while its tip is in contact with the base surface G.

As described above, according to the present embodiment, when one of the two electromagnetic brakes 26 fails, an alarm lamp 41 lights up to indicate an abnormality, and at this stage, the main body 16 of the pallet 15 is fixed to the foundation surface G or the like. No collision with parts. Therefore, a failure of the electromagnetic brake 26 can be detected and repaired before such a collision occurs. Since there is almost no possibility that the two electromagnetic brakes 26 will fail at the same time, the main body of the pallet 15
There is no risk that 16 will collide with a fixed part such as the foundation surface G.

In the first embodiment described above, if the overshoot amount in the distance from the operation of the lower limit detection switch 35 to the stop of the pallet 15 becomes a predetermined value or more, the overshoot determination means
I tried to activate 30 and turn on the alarm lamp 41,
In the second embodiment described below, when the overshoot amount in time becomes equal to or larger than a predetermined value, the overshoot determination means 30 operates and the alarm lamp 41 is turned on.

In the second embodiment, the overshoot discriminating means 30 is constituted by a part of the control program stored in the ROM of the electronic control unit 50, and its flowchart is shown in FIG. The flowchart for this overshoot determination is inserted immediately after step 112 in the flowchart shown in FIG.

Some time overshoot amount (overshoot time) is required from the actuation of the electromagnetic brake 26 to the stop of the pallet 15. This overshoot time is small when both of the two electromagnetic brakes 26 are operating normally (for example, 0.15 seconds when the pallet 15 is unloaded and 0.2 seconds when the pallet 15 is fully loaded). It becomes large when one of the electromagnetic brakes 26 fails and becomes ineffective (for example, 0.32 seconds when the pallet 15 has no load, 0.75 seconds when the pallet 15 has the maximum load).

The pallet 15 has a lower limit detection switch 35 shown in FIG.
If the CPU moves to the position where the
From step 200 in the figure to step 103 in FIG. 7, in steps 110 and 111, when power is being supplied to the motor 25, the power supply is stopped and the electromagnetic brake 26 is activated, but the pallet 15 stops when the lower limit is detected. This is after the above-described overshoot time has elapsed since the switch 35 was activated and the electromagnetic brake 26 was activated. Immediately after the operation of the electromagnetic brake 26 in step 111, the CPU executes the time t in step 300 in FIG.
Is started as 0, and the time counting by the built-in timer is started. In step 301, the speed sensor 29 reads the rotation speed n of the interlocking shaft 23b. Subsequently, the CPU repeats steps 301 and 302 until n = 0, and if n = 0, that is, the pallet 15 is stopped, the time t at that time, that is, the overshoot time, is set to a predetermined time T in step 303.
When t> T, the alarm lamp 41 is turned on in step 304 and the control operation is returned to step 101.

This predetermined time T is slightly longer than the stop time (for example, 0.2 seconds) when the pallet 15 having the vehicle with the maximum load weight is stopped by using both electromagnetic brakes 26, and the pallet 15 with no load is The time is shorter than the stop time (for example, 0.32 seconds) when only the electromagnetic brake 26 is used to stop. As described above, when both of the two electromagnetic brakes 26 are operating normally, the overshoot time is short and the alarm lamp 41 does not light up. When it disappears, the overshoot time becomes long and the alarm lamp 41 is turned on. Therefore, also in this second embodiment, when one of the two electromagnetic brakes 26 fails, an alarm lamp 41 lights up to indicate an abnormality, and at this stage, the main body 16 of the pallet 15 is fixed to a fixed portion such as the foundation surface G. There is no collision, and a failure of the electromagnetic brake 26 can be detected and repaired before such a collision occurs.

[Brief description of drawings]

1 to 8 show a first embodiment of a multi-level parking apparatus according to the present invention. FIG. 1 is an overall plan view in which a main part of a pallet is cut away, FIG. 2 is an overall side view, and FIG. Enlargement of Figure 2 II
I-III sectional view, FIG. 4 is an explanatory view of the operating state of each detection switch, FIG. 5 is a diagram showing an alarm circuit, FIG. 6 is a block diagram showing the connection state of each functional part, FIG. 7 and FIG. FIG. 8 is a flowchart of the control program. FIG. 9 is a flow chart of a portion for performing overshoot determination of the control program of the second embodiment, which is used in addition to the flow chart of the first embodiment. Explanation of symbols 10 …… Fixed frame body, 11 …… Standing member (post), 15 …… Pallet, 18 …… Bearing part (bracket), 20 …… Elevating device,
26: Electromagnetic brake, 30: Overshoot determination means,
35 …… Lower limit detection switch, 41 …… Alarm device (alarm lamp).

Claims (1)

[Scope of utility model registration request] 1. A fixed frame body having a plurality of vertical upright members, a pallet located between the respective upright members for mounting a vehicle, and a plurality of bearing portions on both sides of the pallet, and each supporting portion. In a multi-story parking apparatus including an elevating device that interlocks a supporting portion to elevate and lower along the standing member,
A plurality of electromagnetic brakes provided with the lifting device and having a capacity for blocking the descent of the pallet equipped with the vehicle, even if only a part of the pallet, and the pallet descending with the vehicle mounted are such as a foundation surface. A lower limit detection switch which is activated when a position which is a little larger than a stop distance due to a part of the plurality of electromagnetic brakes from a position where it abuts against a fixed portion and which operates the electromagnetic brakes at the same time, A multi-story parking apparatus comprising an overshoot determination means for activating an alarm device when the amount of overshoot from the activation of the lower limit detection switch to the stop of the pallet becomes a predetermined value or more.