JPH01214672A - Two-stage elevating multilevel parking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a two-stage elevating multilevel parking system, in particular, a pallet on which a car is mounted, and the pallet is configured to be movable up and down by an induction motor. , in a two-stage elevating multi-level parking system comprising a locking mechanism for holding the pallet in an elevating locked state and a lock enabling means for activating the locking mechanism, when an abnormality occurs, the supply of power supply voltage to the induction motor is stopped. The present invention relates to a two-stage elevating type multi-level parking system which is configured to stop the pallet and also to reliably stop the pallet in the event of a power outage while the pallet is being lowered.

[Conventional technology]

With the spread of automobiles, securing garages for storing automobiles has become a problem. Especially in cities and their suburbs,
Due to land shortages, it is difficult to secure land for the garage. Therefore, it is necessary to make effective use of the garage land, and for example, as shown in Figure 6, a two-level elevating multi-level parking system that can store two cars in one storage space is being considered. It has become. Fig. 6 is a schematic side view of a two-stage elevating multi-level parking system, in which reference numeral 1 is a pare-nod on which a car is mounted and is configured to be able to be raised and lowered freely, and 2 and 3 are main pillars. , 4 is a chain for driving the pallet up and down, 5-1 is a lower end locking means provided near the lower end of the main column 3 and locks one end of the chain 4, and 5-2 is provided near the upper end of the main column 2. upper end locking means for locking the other end of the chain 4; 6 a motor (induction motor); 7 a drive shaft with a sprocket wheel (not shown); 8 is a pillow roller that supports the drive shaft 7, 9-1 to 9-3 are rotatable chain rollers that mesh with the chain 4, and IO is a wheel stopper for the pallet 1. It represents a landing detection device for detecting landing. The chain rollers 9-1 and 9-2 are as follows:
It is fixedly and rotatably mounted on the pallet l and moves together with the pallet l. Further, the chain roller 9-3 is fixedly and rotatably provided near the upper end of the main column 2. Although not shown, main pillars similar to the main pillars 2 and 3 are provided at positions facing the main pillars 2 and 3 with the pallet 1 in between, and the chain 4. Lower end locking means 5-1. Upper end locking means 5-2. A low block 8, chain rollers 9-1 to 9-3, etc. are provided symmetrically. Hereinafter, the operation of the vertical parking system shown in FIG. 6 will be briefly explained with reference to FIG. 7. In addition, the seventh
Reference numeral 9-4 in the figure represents a sprocket wheel which is fixed to the drive shaft 7 and meshed with the chain 74 to drive the chain 4, and the other symbols correspond to those in FIG.

In FIG. 7, the center of gravity of the pallet 1 is at least the checker 7, the roller 9-
It is located on the right side (car loading direction) of pallet 2 (this state is the same when a car is mounted on pallet l). Therefore, the pallet 1 has the above-mentioned check 7 and roller 9-
With point 2 in the center, there is a force at work that forces the right side to go down and the left side to go up. However, the palette 1
is the upper end locking means 5 in the checker 7 and roller 9-2.
-2 and the chain 7/roller 9-3, and is supported by the chain 74 between the lower end locking means 5-1 and the sprocket/roller 9-3.
It is supported in the opposite direction by a checker 74 between it and the foil 9-4, and is maintained horizontally.

A motor 6 moves the pallet 1 up and down. That is, the sprocket wheel 9-4 is fixed to the drive shaft 7, and rotates when the drive shaft 7 is driven by the mokro.

When the rotation direction of the sprocket wheel 9-4 is clockwise, the check 74 is driven in the direction of arrow a in the figure, and the pallet I is raised.

Further, when the sprocket wheel 9-4 is rotated counterclockwise, the chain 74 is driven in the direction indicated by the arrow in the figure, and the barrel l-1 is lowered.

In this case, the length of the check 74 (between the lower end locking means 5-1 and the upper end locking means 5-2) is constant, and for example, when the pallet l is raised, the length of the check 74 is constant. Che 7
- Due to the fact that the shortened length of the check 74 between the roller 9-3 and the length of the check 74 between the lower end locking means S-t and the sprocket wheel 9-4 are equal (
When the pallet 1 is lowered, the opposite is true), the above pallet l
The robot will move up and down while maintaining a horizontal position.

Since the motor 6 is a so-called brake motor, the pallet 1 can be stopped at any desired position.

As explained above, in a two-stage elevating multilevel parking system, the pallet on which the automobile is mounted is normally configured so that it can be raised and lowered and stopped at any position. In order to operate such a two-stage elevating multilevel parking device and to take safety measures, it is desirable to have the following functions.

■ For example, as shown in Figure 7 with a two-dot chain line (,
Place the car-mounted pallet 7) 1 at a predetermined position (upper limit position)
If the brake function of the motor 6 is stopped for a long period of time, or if an abnormality occurs in the brake function of the motor 6, the mechanical locking mechanism will be activated even if the brake function of the motor 6 is not activated. The above-mentioned pallet 1 can be kept in a locked state.

(2) As a safety measure when cutting the chain, the cutting of the chain 7 is quickly and reliably detected, the locking mechanism is activated, and the pallet 1 is immediately locked.

(2) During the upward and downward movement of the above-mentioned ball (1), it is automatically stopped at predetermined upper and lower limit positions.

■ In the event that the mokro is overloaded, such as when the weight of the vehicle mounted on the baren 1 is excessive, the power supply to the mokro is cut off, and the locking mechanism is immediately activated to prevent the pallet from collapsing. 1 to lock state.

(2) When a power outage occurs, the locking mechanism is immediately activated to lock the pallet 1.

In order to solve the above-mentioned demands, to make driving operations easier and to improve safety measures, the inventor of the present invention previously developed a "two-stage elevating parking device" (Japanese Patent Application No. 62-306).
No. 278) (hereinafter referred to as the previous proposal). The detailed content of the light proposal is shown in Figures 1 (A) and (B).
) through FIG.

[Problem to be solved by the invention]

In the "two-stage elevating parking device" proposed by Hikari, a power outage occurs while a car is loaded onto the Pareso l-1 and lowered (leakage circuit breaker 41, operation key switch 42, overload circuit breaker 4).
(including during the OFF operation in step 3) occurs, the first
Although the power supply from the power supply to the motor section 6A shown in FIG. 6A is stopped, the pallet I may continue to descend due to inertia due to the load. in this case,
The motor section 6A is forcibly rotated at a rotation speed higher than the synchronous speed. As is well known, when an induction motor is operated at a rotational speed equal to or higher than the synchronous speed, the induction motor enters a state similar to that of an induction generator. Voltage is output from. The main winding terminal U.

As shown by the chain line in FIG. 1, the output voltage from
, contacts 36b+ and 36bz of the limit switch 36 (shown in Figure 5) for detecting chain breakage, and contact 12 of the limit switch 12 (shown in Figure 4) in the locking mechanism.
a (closed when the pallet is lowered), contact CR3 for self-holding of the pallet lowering relay 52, contact 45b of the glue mint switch for detecting the lower limit position of the pallet 1, contact 49a of the bearer 49 (closed when the pallet is lowered) ) to the circuit leading to the terminal V via the excitation coils of the pallet lowering relays 52 and 53 and the contact CR4 of the pallet lowering relay 53. Therefore, the excitation coils of the pallet lowering relays 52 and 53 are connected to the earth leakage breaker 41° operation key switch 42. Overload breaker 43
Even if the supply of power supply voltage through the device is stopped, the operating state is maintained. At this time, the output voltage from the main winding terminal U to the motor section 6,
Rectifying section 6C that supplies energizing voltage to brake section 6B
Therefore, the brake release state of the motor unit 6A by the brake unit 6B is maintained, and even though the power is cut off, the pallet 1
The lowering movement continues and a situation arises in which the above-mentioned locking mechanism does not work undesirably.

The present invention has been made in view of the above-mentioned undesirable problems, and makes it possible to facilitate the operation of a two-stage elevating multilevel parking system, and to improve safety measures, and in particular, to make it possible to improve the safety measures. The purpose is to ensure the reliability of stopping operations during power outages.

[Means to solve the problem]

In order to achieve the above objects, the two-stage elevating parking device of the present invention includes a pallet on which a car is mounted, and the pallet is configured to be movable up and down by a check 7 driven by an induction motor. In a two-stage elevating multi-level parking system comprising a locking mechanism for holding the pallet in an elevating and locking state and a lock enabling means for activating the locking mechanism, the induction motor is connected in parallel to a starting capacitor to support the pallet. An operation capacitor is inserted so that the pallet becomes disconnected when the pallet is lowered and connected when the pallet is raised, and maintains the induction motor in a braking state in response to stopping the voltage supply to the induction motor. A brake is provided to release the braking state of the induction motor in response to voltage supply to the induction motor, and the brake is configured to supply voltage to the induction motor and control the direction of rotation of the motor to raise and lower the pallet. a motor drive control unit that controls the motor drive in a forward and reverse manner in accordance with the above; a power supply voltage stop means that detects an abnormal state and stops the voltage supply to the induction motor; and a lock that corresponds to the voltage supply to the induction motor. a locking mechanism control section that controls the lock enabling means to release the lifting lock state of the mechanism and maintain the lifting lock state of the lock mechanism in response to a voltage supply stop; The supply is performed on the condition that the unlocking of the locking mechanism is detected, and the power supply voltage is controlled to stop supplying the power supply voltage to the induction motor when the abnormality occurs.

Further, the motor drive control unit is configured to rotate the induction motor in a forward and reverse manner so as to correspond to the lifting and lowering operations of the pallet. The pallet lowering relay is equipped with a pallet lowering relay that is energized in response to the lowering operation of the pallet, and a power absorbing load is inserted in parallel with the excitation coil of the pallet lowering relay.

〔Example〕

Fig. 1 is a control circuit diagram that is the premise of the present invention, Fig. 2 is a detailed explanatory diagram of the present invention, Fig. 3 is an explanatory diagram of another embodiment of the present invention, and Fig. 4 is a diagram of the present invention and the previous embodiment. FIG. 5 is an explanatory diagram for explaining the configuration of the locking mechanism in the proposal. FIG. 5 shows a configuration diagram of an embodiment of the drive chain disconnection detection device in the present invention and the previous proposal.

Prior to the description of FIGS. 1 to 3, the locking mechanism (shown in FIG. 4) and chain breakage detection device (shown in FIG. 5) according to the present invention and the previous proposal will be explained.

First, in FIG. 4 showing the configuration of the locking mechanism in the present invention and the previous proposal, the reference numeral 11 in the figure indicates a solenoid;
12 is a limit switch, 13 is an arm rotation axis, 14
1 is an upper arm, 15 is a lower arm, 16 is a bar member, 1
7 is a projection member, 18 is a roller, 19 and 22 are claw rotation shafts, 2o is a first claw member, 21 is a second claw member, 23 and 24 are springs, 25 is a connecting member, 26 is a connecting wire,
Reference numeral 27 represents a connecting roller, 28 represents a cable, and other symbols correspond to those in FIG. Note that the solenoid 11
is a lock enabling means for operating a lock mechanism constituted by the arm rotation shaft 13 or the connecting roller 27.

A solenoid 11 and a limit for detecting the operation of the solenoid 11 are located at a relatively high position on the main column 2.

A switch 12 is installed. Furthermore, an upper arm 14 whose one end is connected to the solenoid 11 and rotates about the arm rotation shaft 13 and a rotatable lower arm 15 are installed near the lower end of the main column 2.
A lever member 16 is connected between the other end and the tip of the lower arm 15.

In addition, at least a pallet 1 (not shown) is attached to the main pillar 2.
A plurality of protruding members 17 are installed at predetermined intervals in the lifting range (shown in FIGS. 6 and 7).

The pallet 1 (not shown) is provided with a first claw member 20 that is provided with a roller 18 that comes into contact with the bar member 16 and that rotates around a claw rotation shaft 19 . Also,
A second pawl member 21 is attached to a portion of the pallet l on the side of the main column (not shown), which is installed at a position facing the main column 2 with the pallet 1 in between. It is installed so that it can rotate freely. Note that the first claw member 20 and the second claw member 21 are configured such that their rotational movements are restricted by springs 23 and 24.

Furthermore, the first claw member 20 and the second claw member 21 are
They are connected by a connecting member 25 provided on the first claw member 20 and a connecting wire 26, and the connecting wire 26 is configured such that its extending direction is reversed by a connecting roller 27 rotatably fixed. There is. Below, the fourth
The operation of the illustrated embodiment will be explained.

In FIG. 4, the upper arm 14 is connected to the arm rotation shaft 13.
When the solenoid 11 is energized, it rotates in the direction of the dotted line arrow in the figure, and when the solenoid 11 is deenergized, it rotates in the direction of the solid line arrow in the figure. As the upper arm 14 rotates, the lower arm 15 and the lever member 16 also rotate in the direction of the dotted line arrow or the solid line arrow direction. That is, the bar member 16 moves substantially horizontally with respect to the roller 18.

Also, a first claw member 2 that is rotatable about a rotation shaft 19 is provided.
0 is given a counterclockwise rotational force by a spring 23. Therefore, the roller 18 rotatably fixed to the first claw member 20 is always in contact with the lever member 16.

When the solenoid 11 is deenergized, the upper arm 14 and the lower arm 15 rotate in the direction of the solid arrow shown in the figure, thereby retracting the position of the lever member 16. As the bar member 16 retreats, the first claw member 20 rotates counterclockwise about the rotation shaft 19, and the tip of the first claw member 20 is disposed on the main column 2. The shape is such that it is located at a position where it can be engaged with the protruding member 17.

Needless to say, when the solenoid 11 is energized, the upper arm 14 and the lower arm 15 rotate in the direction of the dotted arrow in the figure, so that the position of the lever member 16 advances.

As the bar member 16 moves forward, the first claw member 20 rotates clockwise about the rotation shaft 19, and the tip of the first claw member 20 and the protrusion provided on the main column 2 rotate. The state in which the member 17 can be engaged is released.

Next, the operation of the second claw member 21 that interlocks with the first claw member 20 will be explained. The second claw member 21 has a spring 24
The first claw member 20 is connected by a connecting member 25 and a connecting wire 26, so that the first claw member 20 can be rotated clockwise. It is configured to be linked to. Since the connecting wire 26 is configured so that its moving direction is reversed by a rotatably fixed connecting roller 27, the second claw member 21 is rotated by the first claw member 20. It rotates in a rotation direction opposite to the movement direction and at the same rotation angle. Therefore, as described above, the plurality of claw members that engage with the second claw member 21 are attached to another main pillar (not shown) installed at a position facing the main pillar 2 with the pallet 1 (not shown) in between. The projecting members (not shown) of the main pillar 2 are 17.17°.
..., so the engagement and disengagement operations between the second claw member 21 and the projection member (not shown) of the other main pillar are performed by the first claw member described above. 20 and main pillar 2
The engagement operation and the disengagement operation with the projection member 17 are performed similarly and simultaneously.

As explained above, when the pallet l is raised or lowered, the solenoid 11 is energized so that the first claw member 20 and the second claw member 21 do not engage with the protrusion members facing each other, and the pallet 1 Solenoid 11 when the lift stops.
is deenergized, and the first claw member 20 and the second claw member 21 can be engaged with the protrusion members facing each other.

Next, the chain break detection device according to the present invention and the previous proposal will be explained with reference to FIG. In addition, the reference numeral 30 in FIG. 5 is a chain cut detection device, 31 is a chain contact part,
32 is a sliding shaft fixed to the chain contact portion 31; 33
is a spring, 34 is a detector, 35 is a bearing, 36
represents a limit switch, and the other symbols correspond to FIG.

The chain cut detection device 30 is slidably supported by a chain contact portion 31 that contacts the chain 4 and a bearing 35.35 fixed to the metal portion 31 and provided on the detection device national body 34. The sliding shaft 32 and the detection device Kokutai 3
4 and the chain abutting part 31 to press the chain abutting part 31 against the chain 4, and a mint switch 36 for detecting the operation of the sliding shaft 32. It consists of The chain breakage detection device 30 is fixed to a diagonal column 29 in which the chain 4 is housed, as shown in FIG. 6, for example, and when the chain 4 is in a normal state, the spring 33 is The chain contact portion 3 under the compressed state
1 is in contact with the chain 4. This state (hereinafter,
(referred to as the normal state) is illustrated in FIG.

Under the above normal conditions, the sliding shaft 32 allows the limit
Switch 36 is activated. That is, the fact that the limit switch 36 is in an activated state means that a normal state has been detected.

If an accident occurs in which the chain 4 is cut, the chain 4 may become loose, or depending on the location of the cut, the chain 4 may no longer be in contact with the chain contact portion 31. When such a state (hereinafter referred to as a chain disconnected state) occurs, the restraint of the chain abutting part 31 by the chain 4 is released, so that the chain abutting part 31 is held together with the sliding shaft 32 by the spring 33. It is pushed out in the direction of the arrow shown in the figure, and the operating state of the limit switch 36 is released. That is, the fact that the limit switch 36 is in a non-operating state means that the occurrence of a chain disconnection state has been detected.

As explained above, the limit switch 36 reliably detects whether the chain 4 is in a normal state or in a disconnected state. Therefore, based on the chain disconnection state detection signal output from the limit switch 36, the above-described locking mechanism shown in FIG. 4 is activated to immediately lock the pallet. In the fifth illustrated embodiment, a limit switch is used as a means for detecting the chain disconnection state, but the present invention is not limited to this, and for example, a detection means such as a proximity switch may be used. You may also use it.

The locking mechanism and chain disconnection detection device provided in the two-stage elevating multi-level parking system of the present invention and the previous proposal have been described above, and the two-stage elevating multi-story parking system of the present invention and the previous proposal equipped with these has been described. The basic operational aspects of the system will be explained with reference to the control circuit diagram shown in FIG. Although it has been divided into Figure 1 (A) and (B) due to space limitations, Figure 1 (A) and Figure 1 (B) are connected at arrows a, b, and c, respectively. has been done.

In Fig. 1, 6A is a motor section, 6B is a brake section,
6C is a rectifier section and the motor section 6A.

The motor 6 shown in FIG. 6 is constituted by the brake section 6B and the rectifier section 6C.

11C is the solenoid coil of the solenoid 11 shown in FIG. 4, 12a is the contact of the limit switch 12 shown in FIG.・
44b is a contact point of the switch 36 that turns off when the chain 4 is disconnected; 44b is a glue mint switch (not shown) for detecting the upper limit position of the pallet 1 (shown in Figure 6);
The contact 45b represents the contact of a limit switch (not shown) for detecting the lower limit position of the pallet 1.

Further, 41 is an earth leakage breaker, and 42 is an operation key switch.

H, 43 is an overload circuit breaker, 46 to 48 are push button switches, 49 is a timer, 49a is a contact point of the timer 49 which is turned on when the timer 49 is energized and a predetermined time elapses; 50 to 48; 53 is a relay, CRI and CR2 are a contacts of relays 50 and 51, CR3 and CR4 are a contacts of relays 52 and 53, and CR2b and CR4b are b contacts of relays 51 and 53, respectively. Relay 5 for lifting pallets
0.51 is energized and while relay 52.53 for pallet lowering is energized (CR2 or CR
4 is in a closed circuit state) and outputs an energizing voltage to the brake section 6B.

The operation of the two-stage elevating multi-level parking system according to the present invention and the previous proposal and the control mode during the operation will be explained with reference to FIG.

First, the operation key switch 42 is turned on. When the pallet 1 is to be raised from the lower limit position (car mountable position) to the upper limit position, the push button switch 47 is pressed. By pressing the push button switch 47, the solenoid coil
C is energized, and the pallet l is activated by the locking mechanism shown in Figure 4.
The lifting/lowering lock state is released, and the above limit/
The contact 12a of the switch 12 is turned on. Further, when a predetermined period of time has elapsed since the pushbutton switch 47 was pressed, the contact 49a of the timer 49 is turned on, so that the relay 5
0 and 51 are energized and are in a self-holding state. Note that since the solenoid coil IC is energized, the contact 12a of the limit switch 12 is in the on state, and assuming that the two-stage elevating multi-level parking system is in a normal state, the overload breaker 43 is in the on state. The contacts 36b1 and 36b2 of the limit switch 36 are also on, and the contact 44b of the upper limit position detection limit switch is also on.

By energizing the relays 50 and 51, the relay 5
A contacts CRI and CR2 of 0 and 51 turn on,
The brake part 6B is energized (that is, the brake is released) via the rectifier part 6c, and the terminals U, V (main winding terminals) and terminals X, Y (auxiliary winding terminals) of the motor part 6A are Since the voltage supply to motor 6 (
7) is started and the pallet 1 is raised. In addition,
The rotational direction of the motor 6 when the pallet 1 is raised is defined as the forward direction. When the pallet 1 reaches the upper limit position, the contact 44 of the limit switch for detecting the upper limit position
b is in the off state, the relays 50 and 51 are deenergized, and the ? of the relays 50 and 51 is deenergized.
Contacts CRI and CR2 are turned off and the voltage supply to the motor section 6A is stopped, so that the pallet l
automatically stops at the upper limit position. At this time, since the voltage supply to the brake section 6B is also stopped, the motor 6
The brake is applied to the solenoid coil I.
Ic is deenergized, and the pallet I can be raised and lowered into a locked state by the locking mechanism. Therefore, even if the operation key switch 42 is shut off while the pallet 1 is stopped at the upper limit position, or even if the power to the two-stage elevating multi-story parking system is cut off, the pallet 1 will not be stopped by the brake section 6B. It will remain retained. Furthermore, even if the brake section 6B does not function sufficiently undesirably,
Since the pallet 1 can be locked up and down by the locking mechanism, the locked up and down state of the valet 1 is maintained.

Next, the operation and control mode for lowering the pallet 1 from the upper limit position to the lower limit position will be explained.

When performing the lowering operation of the pallet 1, press the push button switch 4.
Press 8. By pressing the push button switch 48, the solenoid coil IIC is energized, and the lifting/lowering lock state of the pallet l by the locking mechanism shown in FIG. 4 is released, and the contact 12a of the limit switch 12 is turned on. Further, when a predetermined time has elapsed since the push button switch 48 was pressed, the contact 49a of the timer 49 is turned on, thereby energizing the relays 52 and 53 and putting them in a self-holding state. When the relays 52 and 53 are energized, the a contacts CR3 and CR4 of the relays 52 and 53 are turned on, and the brake section 6B is energized via the rectifying section 6C (i.e., the brake is released), and the terminals U and V (main @ line terminals) of the motor section 6A
and terminal X.

Voltage is supplied to Y (auxiliary winding terminal).

At this time, the phase of the voltage supplied to the terminals X and Y of the motor section 6A is opposite to that during the rise described above, so the rotation direction of the motor 6 is also reversed, and the pallet 7) 1 descends. When the lower limit position is reached, the contact 45b of the lower limit position detection limit switch is turned off, and the pallet l automatically stops at the lower limit position.

Further, if for some reason the barrette 1 is to be stopped during the ascent and descent, the stop push button switch 46 is pressed. By pressing the push button switch 46, the relay 50.51 or the relay 52.53 is deenergized, and the a contact CRI, CR2 or CR of the relay 50.51 or the relay 52.53 is deenergized.
3. When CR4 is turned off and the voltage supply to the motor section 6A is stopped, the pallet I is stopped. At this time, the voltage supply to the brake section 6B is also stopped, so the motor 6 is braked, the solenoid coil IIG is deenergized, and the pallet 1 is placed in a state where it can be locked up and down by the locking mechanism. Note that when the starting pushbutton switch 47 or 48 is pressed, the relay 5
If the control mode is such that 0 and 51 or relays 52 and 53 are energized, then immediately after pressing the stop push button switch 46, the start push button switch in the opposite direction is pressed (i.e., during the rising If the push button switch 48 is pressed immediately after the stop push button switch 46 is pressed, or the push button switch 47 is pressed immediately after the stop push button switch 46 is pressed while descending, the motor 6 This is dangerous because it reverses instantly. Therefore, even if the start push button switch in the opposite direction is pressed immediately after the stop push button switch 46 is pressed, the motor 6 will not start until after the motor 6 has completely stopped. Therefore, the above-mentioned timer 49 is provided.

Further, when a chain breakage occurs, the chain breakage is detected by the chain breakage detection device 30 shown in FIG.
There are two glue mints, sui, on both sides of the main pillar.
When the 7th contact 36b1 or 36b2 is turned off, the same control mode as when the above-described stop push button switch 46 is pressed is achieved. Furthermore, the control mode when the overload breaker 43 operates is also substantially the same.

In the present invention and the previous proposal, when the motor 6 is in a stopped state, a brake is applied to the motor 6 and the pallet 1 is held in a stopped state by the brake part 6B, and the above-mentioned locking mechanism allows the pallet to be raised and lowered into a lockable state. is retained. Therefore, even if the brake part 6B does not function sufficiently undesirably or if a chain breakage occurs, the lifted/lower locked state of the pallet I is maintained.

In the above-described embodiment shown in FIG. 1, when a power outage occurs while the pallet 1 is loaded with automobiles and is being lowered, the power supply from the power source to the motor section 6A is stopped; may continue to descend due to inertia caused by the load. In this case, the motor section 6A is forcibly rotated at a rotation speed equal to or higher than the synchronous speed. As is well known, when an induction motor is operated at a rotational speed equal to or higher than the synchronous speed, the induction motor is in a state similar to an induction generator, so that the output is output from the main winding terminals U and V of the motor section 6A. Due to the self-generated voltage, the excitation coils of relays 52 and 53 remain energized. At this time, the output voltage from the main winding terminals U and V of the motor section 6A is transferred to the rectifier section 6C which supplies the energizing voltage to the brake section 6B as well as to the excitation coils of the pallet lowering relays 52 and 53. Therefore, the brake release state of the motor unit 6A by the brake unit 6B is maintained, and the downward movement of the pallet 1 continues despite the power outage. A desired condition occurs.

The present invention has solved this problem, and the embodiments of the present invention shown in FIGS. 2 and 3, which will be described below, were made in view of the above-mentioned undesirable problem.

FIG. 2 shows the motor section 6 shown in FIG. 1 in the case of the present invention.
6A-1 is the main winding, 6A-2 is the auxiliary winding, 6A-3 is the rotor, and 6A-4 is the circuit configuration of A.
is the starting capacitor, 6A-5 is the running capacitor, 6A-
6 represents a governor switch.

The motor section 6A shown in FIG. 2 is a so-called capacitor-start induction motor. That is, a main winding 6A-1 and an auxiliary winding 6A-2 are wound around the stator with a phase difference of 90 degrees in electrical angle, and a starting capacitor 6A-2 is connected in series with the auxiliary winding 6A-2. 4 and a governor switch 6A-6 are inserted. The operating capacitor 6A-5 is connected substantially in parallel with the starting capacitor 6A-4 at the b contact of the pallet lowering relay 52 or 53 (relay 5 in FIG. 2).
It is inserted through the b contact CR3b) of No.2. In addition,
The governor switch 6A-6 is set to open when the rotation speed of the motor 6 reaches, for example, about 80% of the synchronous speed. Therefore, the above operating capacitor 6A-
5 is effective only when the pallet 1 is raised and is disconnected when it is lowered. Therefore, even if a power outage or the like occurs during descent, the capacity of the capacitor required to function as an induction generator and generate electricity is insufficient, and the self-generated voltage from the main winding 6A-1 will drop significantly. Therefore, if a power outage or the like occurs during the descent, the barre 7 will surely stop at that position, as described above.

FIG. 3 shows another embodiment of the present invention. That is, although FIG. 3 shows a portion corresponding to the dotted line indicated by arrow A in FIG. 1(B),
The other ranges are examples having the same configuration as in FIG. 1.

The embodiment shown in FIG. 3 is a relay 52.5 for lowering the pallet.
A power absorbing load 54 such as a resistor and a coil 2 lamp is inserted in parallel with the excitation coil No. 3. That is, if a power outage or the like occurs while the pallet 1 is being lowered, the automatic power generation of the motor 6 will be interrupted even if a self-generated voltage is output from the sheet metal main winding 6A-1 as explained at the beginning of this specification. Since the capacity is small, the self-generated voltage from the motor section 6A is
It is absorbed by the power absorbing load 54 (the voltage is lowered due to the presence of the power absorbing load 54), so that the pallet lowering relays 52 and 53 are not energized. That is, the resistance value of the power absorbing load 54 is selected in this way. Therefore, when a power outage or the like occurs during descent, the Valent 1 will surely stop at that position, as described above.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided a locking mechanism for holding a pallet on which a vehicle is mounted in a locking state for raising/lowering, a chain breakage detection device for detecting occurrence of a breakage state of a drive chain, and means for detecting an upper limit position and a lower limit position. By providing overload detection means, etc., and controlling the two-stage elevating multi-story parking system accordingly, the two-stage four-elevating multi-story parking system can be operated easily, and safety measures can be improved. In particular, in the event of a power outage while the pallet is being lowered, the pallet can be stopped reliably.

[Brief explanation of the drawing]

Fig. 1 is a control circuit port which is a premise of the present invention, Fig. 2 is a detailed explanatory diagram of the present invention, Fig. 3 is an explanatory diagram of another embodiment of the present invention, and Fig. 4 is a diagram illustrating the present invention and the previous embodiment. An explanatory diagram for explaining the configuration of the locking mechanism in the proposal, FIG. 5 is a configuration diagram of an embodiment of the drive chain disconnection detection device in the present invention and the previous proposal, and FIG. 6 is an elevation diagram to which the present invention is applied. FIG. 7 is a schematic side view of the multi-level parking system, and FIG. 7 is an explanatory diagram of the operation of the vertical multi-level parking system shown in FIG. In the figure, l is a pallet, 2 and 3 are main pillars, 4 is a check 7.
5-1 is a lower end locking means, 5-2 is an upper end locking means, 6 is a motor, 6A is a motor section, 6A-1 is a main winding, 6A-2 is an auxiliary winding, 6A-3 is a rotor, 6A-4 is the starting capacitor, 6A-5 is the operating capacitor, 6A-6 is the governor switch 6B is the brake part, 6C is the rectifier part, 7 is the drive shaft,
8 is a pillow block, 9-1 to 9-3 are a check 7/roller, IO is a landing detection device, 11 is a solenoid, 11C
is the solenoid coil, 12 is the limit switch, 1
2a is a contact point, 13 is an arm rotation axis, 14 is an upper arm,
15 is a lower arm, 16 is a bar member, 17 is a protrusion member,
18 is a roller, 19 and 22 are pawl rotation shafts, and 20 is a first
21 is a second claw member, 23 and 24 are springs, 25 is a connecting member, 26 is a connecting wire, 27 is a connecting roller, 28 is a cable, 29 is a diagonal column, 30 is a chain cutting detection device, 31 is a chain contact part, 32 is a sliding shaft, 33 is a spring, 34 is a detection device, 35 is a bearing, 36 is a limit switch, 36b is a contact, 41 is an earth leakage breaker,
42 is an operation key switch, 43 is an overload breaker, 44b
and 45b are contacts, 46 to 48 are push button switches,
49 is a timer, 49a is a contact, 50 to 53 are relays, and 54 is a power absorption load.

Claims (2)

[Claims] (1) A pallet on which a car is mounted is provided, and the pallet is configured to be able to be raised and lowered by a chain driven by an induction motor, and includes a locking mechanism that holds the pallet in a raised and lowered locked state, and a locking mechanism that operates the locking mechanism. In a two-stage elevating multi-level parking system, the induction motor is arranged in parallel with a starting capacitor so that it is in a disconnected state when the pallet is lowered and is in a connected state when the pallet is raised. A driving capacitor is inserted, and the induction motor is held in a brake state in response to stopping the voltage supply to the induction motor, and the brake state of the induction motor is released in response to the voltage supply to the induction motor. a motor drive control unit comprising a brake and supplying voltage to the induction motor and controlling the direction of rotation of the motor in the forward and reverse directions in response to the lifting and lowering movements of the pallet; and the occurrence of an abnormality. power supply voltage stopping means for detecting a state and stopping the voltage supply to the induction motor; and a power supply voltage stopping means for releasing the lifting lock state of the locking mechanism in response to the voltage supply to the induction motor and locking the lock in response to the stoppage of the voltage supply. a locking mechanism control section that controls the lock enabling means to maintain the lifting/lowering locked state of the mechanism; the voltage supply by the motor drive control section is performed on condition that the locking operation of the locking mechanism is detected to be released;
A two-stage elevating multi-level parking system, characterized in that control is performed to stop the supply of power supply voltage to the induction motor when the abnormality occurs. (2) A pallet on which a car is mounted is provided, and the pallet is configured to be able to be raised and lowered by a chain driven by an induction motor, and includes a locking mechanism that holds the pallet in a raised and lowered locked state, and a locking mechanism that operates the locking mechanism. In the two-stage ascending/descending multilevel parking system, the induction motor maintains the induction motor in a brake state in response to the stoppage of the voltage supply to the induction motor, and stops the voltage supply to the induction motor. a brake for releasing the braking state of the induction motor in response to the above, and a lifting operation of the pallet for controlling the rotational direction of the induction motor in a forward and reverse manner in correspondence with the lifting and lowering operations of the pallet. A pallet lifting relay is energized in response to the pallet lowering operation, and a pallet lowering relay is energized in response to the pallet lowering operation, and a power absorbing load is provided in parallel with the excitation coil of the pallet lowering relay. a motor drive control section inserted therein; a power supply voltage stop means for detecting an abnormal state and stopping the voltage supply to the induction motor; and a lifting lock state of the lock mechanism in response to the voltage supply to the induction motor. and a lock mechanism control section that controls the lock enabling means to release the lock mechanism and maintain the lock mechanism in the vertically locked state in response to the stoppage of the voltage supply, and the voltage supply by the motor drive control section is controlled by the lock mechanism control section. This is performed on the condition that the lock operation is released, and
A two-stage elevating multi-level parking system, characterized in that control is performed to stop the supply of power supply voltage to the induction motor when the abnormality occurs.