JPH0449628B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a two-stage elevating multilevel parking system, particularly 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, which is equipped with a locking mechanism for holding the pallet in the elevating and lowering locked state and a lock enabling means for activating the locking mechanism, when an abnormality occurs, the power supply voltage to the induction motor is reduced. In addition to stopping the supply, the pallet can be reliably stopped in the event of a power outage while the pallet is being lowered.
The present invention relates to a step-up/down type multilevel parking device.

[Conventional technology]

With the spread of automobiles, securing garages for storing automobiles has become a problem. Particularly in cities and their suburbs, it is difficult to secure land for garages due to land shortages. 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. I'm getting used to it. Fig. 6 is a schematic side view of a two-stage elevating multi-story parking system, in which reference numeral 1 is a pallet on which a car is mounted and is configured to be able to be raised and lowered, 2 and 3 are main pillars, 4 5-1 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 to lock one end of the chain 4; 5-2 is a lower end locking means 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), which is driven by the motor 6 via the sprocket wheel. 8 is a pillow block that supports the drive shaft 7, and 9-1 to 9-
3 is a rotatable chain that meshes with the chain 4.
The roller 10 represents a landing detection device for detecting the landing of the pallet 1 on the bollard. The chain rollers 9-1 and 9-2 are fixedly and rotatably mounted on the pallet 1 and move together with the pallet 1. Further, the chain roller 9-3 is fixedly and rotatably provided near the upper end of the main column 9. Although not shown, main columns similar to the main columns 2 and 3 are provided at positions facing the main columns 2 and 3 with the pallet 1 in between, and the chain 4 and the lower end Stopping means 5-1, upper end locking means 5-2, pillow 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. Note that the reference numeral 9-4 in FIG. 7 represents a sprocket wheel that is fixed to the drive shaft 7 and meshes with the chain 4 to drive the chain 4, and the other reference numerals correspond to those in FIG. There is.

In FIG. 7, the center of gravity of the pallet 1 is at least on the right side of the chain roller 9-2 (in the direction of vehicle loading), as indicated by the arrow W in the figure.
(This state is the same even when a car is mounted on pallet 1). Therefore, a force is acting on the pallet 1, centering on the chain roller 9-2, which tends to cause the right side to move downward and the left side to rise upward. However, the palette 1
is supported by the chain 4 between the upper end locking means 5-2 and the chain roller 9-3 in the chain roller 9-2, and the lower end locking means 5-
It is supported in the opposite direction by the chain 4 between the sprocket wheel 9-4 and the sprocket wheel 9-4 to keep it horizontal.

The pallet 1 is moved up and down by a motor 6. That is, the sprocket foil 9-4
is fixed to a drive shaft 7, and rotates when the drive shaft 7 is driven by the motor 6. And the above sprocket foil 9-4
When the rotating direction is clockwise, the chain 4 is driven in the direction of arrow a in the figure, and the pallet 1 is raised. Further, when the direction of rotation of the sprocket wheel 9-4 is counterclockwise, the chain 4 is driven in the direction of arrow b in the figure, and the pallet 1 is lowered. In this case, the length of the chain 4 (between the lower end locking means 5-1 and the upper end locking means 5-2) is constant, and for example, when the pallet 1 is raised, the length of the chain 4 is constant. Because the shorter length of the chain 4 between the chain roller 9-3 and the longer length of the chain 4 between the lower end locking means 5-1 and the sprocket wheel 9-4 are equal. ,
(The reverse is true when the pallet 1 is lowered.) The pallet 1 moves up and down while maintaining its horizontal state. Since the motor 6 is a so-called brake motor, the pallet 1 can be stopped at any desired position.

As explained above, normally in a two-stage elevating multi-level parking system, the pallet on which the car is mounted is
It is constructed so that it can be raised and lowered and stopped at any position. It is desirable to have the following functions in order to operate such a two-stage elevating multilevel parking system and to take complete measures.

For example, as shown by the two-dot chain line in Fig. 7, there are cases where the pallet 1 carrying a car is raised to a predetermined position (upper limit position) and the stopped state is continued for a long time, or when the motor When an abnormality occurs in the brake function of the motor 6, the pallet 1 can be kept in a locked state by a mechanical locking mechanism without relying on the brake function of the motor 6.

As a complete countermeasure against chain breakage, the chain breakage is quickly and reliably detected, the locking mechanism is operated, and the pallet 1 is immediately locked.

During the lifting and lowering operation of the pallet 1, the pallet 1 is automatically stopped at predetermined upper and lower limit positions.

When the motor 6 becomes overloaded, such as when the weight of a car mounted on the pallet 1 is excessive, the power supply to the motor 6 is cut off, and the lock mechanism is immediately activated to remove the pallet. 1 to lock state.

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

In order to solve the above-mentioned demands, make driving operations easier, and improve safety measures, the inventor of the present application previously developed a "two-stage elevating parking device (Japanese Patent Application No. 306,278/1982)". (hereinafter referred to as the previous proposal)
is proposed. The detailed content of the proposal by the other party is as follows:
The present invention will be described below with reference to FIGS. 1A, B through 7.

[Problem to be solved by the invention]

In the above-mentioned proposed "two-stage elevating parking system", a power outage occurs (earth leakage circuit breaker 41, operating key switch 4
2) (including when the overload circuit breaker 43 is turned off), the power supply from the power source to the motor section 6A shown in FIG. It may continue to descend due to inertia. 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 rotation 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 output voltage from the main winding terminals U and V is, as shown by the chain line in FIG. Contacts 36b ₁ and 36 (shown in Figure 5)
b ₂ , limit switch 12 in the lock mechanism
Contact 12a (shown in Figure 4) (closed when the pallet is lowered), contact CR3 for self-holding of the pallet lowering relay 52, contact 45b of the limit switch for detecting the lower limit position of the pallet 1, timer 4
The excitation coils of the pallet lowering relays 52 and 53 and the contact CR of the pallet lowering relay 53 are connected through the contact 49a (closed when the pallet is lowered) of 9.
4 to the circuit leading to the terminal V.
Therefore, the pallet lowering relays 52 and 5
The excitation coil No. 3 remains in its operating state even if the supply of power supply voltage via the earth leakage circuit breaker 41, operation key switch 42, and overload circuit breaker 43 is stopped. At this time, the rectifier 6C supplies the output voltage from the main winding terminals U and V of the motor section 6A to the brake section 6B in the same way as the excitation coils of the pallet lowering relays 52 and 53. Therefore, the brake release state of the motor part 6A by the brake part 6B is maintained, and the lowering operation of the pallet 1 continues even though the power is cut off, and the above-mentioned lock is applied. A situation arises in which the mechanism does not work as desired.

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 chain driven by an induction motor. , a two-stage elevating multi-level parking system comprising a locking mechanism for holding the pallet in a raised/lowered locked state, and a lock enabling means for activating the locking mechanism, wherein the induction motor is connected to the pallet in parallel with a starting capacitor. A driving 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 a brake is provided to release the brake state of the induction motor in response to voltage supply to the induction motor, and to control the direction of rotation of the motor to raise and lower the pallet. a motor drive control unit that freely controls the motor drive in forward and reverse directions in accordance with the operation; a power supply voltage stop means that detects an abnormal state and stops the voltage supply to the induction motor; a lock mechanism control section that controls the lock enabling means to release the locking state of the locking mechanism and maintain the locking state of the locking mechanism in response to a voltage supply stop; The voltage supply is performed on the condition that the lock operation of the lock mechanism is detected to be released, and the power supply voltage is controlled so as to stop the supply of power supply voltage to the induction motor when the abnormality occurs.

The motor drive control section is configured to control the rotation direction of the induction motor in the forward and reverse directions in response to the lifting and lowering operations of the pallet. The present invention is characterized in that it comprises a relay and a pallet lowering relay which 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〕

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

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

First, in FIG. 4 showing the structure of the lock mechanism in the present invention and the previous proposal, the reference numeral 11 in the figure
is the solenoid, 12 is the limit switch, 13
14 is an upper arm, 15 is a lower arm, 16 is a bar member, 17 is a projection member, 18
are rollers, 19 and 22 are claw rotating shafts, 20 is a first claw member, 21 is a second claw member, 23 and 2
4 is a spring, 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. The solenoid 11 is a lock enabling means for operating a lock mechanism constituted by the arm rotation shaft 13 and the connecting roller 27.

A solenoid 11 and a limit switch 12 for detecting the operation of the solenoid 11 are installed at a relatively high position on the main column 2. Further, an upper arm 14 and a main column 2 are connected at one end to the solenoid 11 and rotate about an arm rotation shaft 13.
A rotatable lower arm 15 is installed near the lower end of the upper arm 14, and the other end of the upper arm 14 and the lower arm 1
A bar member 16 is connected between the tip of the bar member 5 and the tip of the bar member 16 . Further, a plurality of protruding members 17 are installed on the main column 2 at predetermined intervals at least within the range of lifting and lowering of the pallet 1 (not shown) (shown in FIGS. 6 and 7).

The pallet 1 (not shown) is provided with a first pawl member 20 which is provided with a roller 18 that comes into contact with the bar member 16 and rotates about a pawl rotation shaft 19. In addition, a second pawl member 21 is attached to a portion of the pallet 1 on the side of the main column (not shown) that 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
This means that the first claw member 20 is connected by a connecting member 25 and a connecting wire 26, and the connecting wire 26 is connected by a connecting roller 27 that is rotatably fixed so that the direction of extension is reversed. It is configured. The operation of the embodiment shown in FIG. 4 will be described below.

In FIG. 4, the upper arm 14 rotates about the arm rotation shaft 13 in the direction of the dotted arrow when the solenoid 11 is energized, and in the direction of the solid arrow when the solenoid 11 is deenergized. As the upper arm 14 rotates, the lower arm 15 and the bar 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.
Further, a counterclockwise rotation force is applied by a spring 23 to the first claw member 20 which is rotatable about the rotation shaft 19 . Therefore, the roller 18 rotatably fixed to the first claw member 20
is in constant contact with the bar 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 bar member 16. Due to the retreat of the bar member 16, the first claw member 20 rotates counterclockwise about the rotation shaft 19, and the tip of the first claw member 20 moves toward the protrusion disposed on the main column 2. The shape is such that it is located at a position where it can be engaged with the member 17.

Needless to say, when the solenoid 11 is energized, the upper arm 14
As the lower arm 15 rotates in the direction of the dotted arrow shown in the figure, the position of the bar 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 member disposed on the main column 2 are rotated. 17 will be released.

Next, a second claw member 20 interlocking with the first claw member 20 is provided.
The operation of the claw member 21 will be explained. Second claw member 2
1 is configured such that a clockwise rotational force is applied by a spring 24, and is connected by a connecting member 25 and a connecting wire 26 provided on the first pawl member 20, so that the first pawl Part 2
It is configured to be linked to the rotation of 0. The connecting wire 26 is configured so that its moving direction can be reversed by a connecting roller 27 that is rotatably fixed, so that the connecting wire 26 can move in the opposite direction.
is rotated in a rotation direction opposite to the rotation direction of the first claw member 20 and at the same rotation angle. Therefore, as described above, the second claw member 21 engages with another main pillar (not shown) installed at a position facing the main pillar 2 with the pallet 1 (not shown) in between. A plurality of protruding members (not shown) are the protruding members 17, 17 of the main pillar 2.
..., so the second claw member 2
The engagement and disengagement operations between the first claw member 20 and the protrusion member 17 of the main column 2 described above are the same as the engagement and disengagement operations between the first claw member 20 and the protrusion member 17 of the main column 2 described above. It is performed in the same manner and simultaneously as the release operation.

As explained above, when the pallet 1 is raised or lowered, the solenoid 11 is energized and the first claw member 20
The second claw member 21 and the protrusion members facing each other are prevented from engaging with each other, and when the pallet 1 stops moving up and down, the solenoid 11 is deenergized, and the first claw member 20 and the second claw member are prevented from engaging with each other. 21 and the protrusion members facing each other can be engaged with 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,
Reference numeral 30 in FIG. 5 is a chain cut detection device;
31 is a chain contact part, 32 is the chain contact part 3
1 is a fixed sliding shaft, 33 is a spring, 34
is the detection device housing, 35 is the bearing, and 36 is the limit.
This represents a switch, and other symbols correspond to those in FIG.

The chain cut detection device 30 is slidably supported by a chain contact portion 31 that contacts the chain 4, and bearings 35, 35 fixed to the chain contact portion 31 and provided in the detection device casing 34. Sliding shaft 32
and a spring 33 interposed between the detection device casing 34 and the chain contact portion 31 to press the chain contact portion 31 against the chain 4.
and a limit sensor that detects the movement of the sliding shaft 32.
It is composed of a switch 36. 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 31 is in contact with the chain 4 in the compressed state. This state (hereinafter referred to as normal state) is illustrated in FIG.

Under the above normal conditions, the limit switch 36 is operated by the sliding shaft 32. That is, the fact that the limit switch 36 is in an operating 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. Such a state (hereinafter,
When a chain disconnection state (referred to as a chain disconnection state) occurs, the chain contact portion 31 is released from the restraint state by the chain 4, so that the chain contact portion 31 is connected to the spring 3.
3, the limit switch 36 is pushed out together with the sliding shaft 32 in the direction of the arrow shown, and the operating state of the limit switch 36 is released. That is, the limit switch 36
The fact that the chain is in a non-operating state means that the occurrence of a chain disconnection state has been detected.

As explained above, the limit switch 3
6, it is reliably detected whether the chain 4 is in a normal state or in a disconnected state. Therefore, based on the chain disconnection state detection signal outputted from the limit switch 36, the aforementioned locking mechanism shown in FIG. 4 is activated to immediately lock the pallet. In the embodiment shown in FIG. 5, 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 according to the present invention and the previous proposal have been explained above. The basic operating state of the system will be explained in conjunction with the control circuit diagram shown in FIG. Although the drawing is divided into FIG. 1A and FIG. 1B due to space limitations, FIG. 1A and FIG. 1B are connected at arrows a, b, and c, respectively.

In FIG. 1, 6A is a motor section, 6B is a brake section, and 6C is a rectifier section.
A, the brake part 6B, and the rectifier part 6C, the sixth
The illustrated motor 6 is configured.

11C is the solenoid 11 shown in FIG. 4 and a solenoid coil; 12a is a contact point of the limit switch 12 shown in FIG. 4 which is turned on when the solenoid 11 is energized; 36b ₁ and 36b ₂
44b is a contact point of the limit switch 36 shown in FIG. 5, which is turned off when chain 4 breaks, and 44b is a contact point of a limit switch (not shown) for detecting the upper limit position of pallet 1 (shown in FIG. 6). A contact point 45b represents a contact point of a limit switch (not shown) for detecting the lower limit position of the pallet 1. Further, 41 is an earth leakage breaker, 42 is an operation key switch, 43 is an overload breaker, 46 to 48
49 is a push button switch, 49 is a timer, 49a is a contact point of the timer 49 which turns on when the timer 49 is energized and a predetermined time has elapsed, 50 to 53 are relays, CR1 and CR2 are relays 5
0 and 51 a contacts, CR3 and CR4 are relays 52 and 53 a contacts, CR2b and CR4
b represents the b contacts of relays 51 and 53, respectively. Note that the rectifier 6C operates while the pallet raising relays 50 and 51 are energized and while the pallet lowering relays 52 and 53 are energized (CR2 or C4 is in a closed state). It 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. When the push button switch 47 is pressed down, the solenoid coil 11C is energized, and the lifting/lowering lock of the pallet 1 by the locking mechanism shown in FIG. 4 is released, and the contact 12a of the limit switch 12 is turned on. Also,
When the contact 49a of the timer 49 is turned on after a predetermined time has elapsed since the push button switch 47 is pressed, the relays 50 and 51 are energized and enter a self-holding state. Further, since the solenoid coil 11C is energized, the contact 12a of the limit switch 12 is in the on state, and assuming that the two-stage elevating multilevel parking system is in a normal state, the overload breaker 43 is in the on state. Limit switch 3
The contacts 36b ₁ and 36b ₂ of No. 6 are also in the on state, and the contact 44b of the limit switch for detecting the upper limit position is also in the on state.

By energizing the relays 50 and 51, the a contacts CR1 and CR2 of the relays 50 and 51 are activated.
is turned on, and the brake part 6B is turned on via the rectifying part 6C.
is energized (that is, the brake is released), and the terminals U and V (main winding terminals) of the motor section 6A
Since the voltage supply to the terminals X and Y (auxiliary winding terminals) is started, the motor 6 (as shown in Figure 7)
starts and pallet 1 rises. Note that the rotation direction of the motor 6 when the pallet 1 is raised is defined as the forward direction. Then, when the pallet 1 reaches the upper limit position, the contact 44b of the upper limit position detection limit switch is turned off, so that the relays 50 and 51 are deenergized, so that the a of the relays 50 and 51 is Contacts CR1 and CR2
is turned off and the voltage supply to the motor section 6A is stopped, so that the pallet 1 is automatically stopped at the upper limit position. At this time, the voltage supply to the brake section 6B is also stopped, so the motor 6 is braked, and the solenoid
The coil 11C is deenergized and the pallet 1 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, the pallet 2
Even if the power to the multi-level parking system is cut off, the pallet 1 remains stopped by the brake section 6B. Further, even if the brake section 6B does not function sufficiently undesirably, the pallet 1 can be lifted and lowered in a locked state by the locking mechanism, so that the lifted and lowered locked state of the pallet 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. To lower the pallet 1, push button switch 48 is pressed. The push button switch 48
When pressed, the solenoid coil 11C is energized, and the lifting/lowering lock of the pallet 1 by the locking mechanism shown in FIG. 4 is released, and the contact 12a of the limit switch 12 is turned on. Furthermore, 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. By energizing the relays 52 and 53, the relay 5
A contacts CR3 and CR4 of 2 and 53 are turned on, and the brake part 6B is energized (that is, the brake is released) via the rectifying part 6C, and the terminals U and V (main winding) of the motor part 6A are turned on. Voltage is supplied to the winding terminals) and the terminals X, Y (auxiliary winding terminals). Terminals X and Y of the motor section 6A at this time
Since the phase of the voltage supplied to the pallet 1 is opposite to that during the rise described above, the rotation direction of the motor 6 is also reversed, and the pallet 1 is lowered. When the lower limit position is reached, the contact 45b of the limit switch for detecting the lower limit position is turned off, and the pallet 1 is automatically stopped at the lower limit position.

Further, if for some reason the pallet 1 is to be stopped during its ascent and descent, the stop push button switch 46 is pressed. By pressing the push button switch 46, the relays 50, 51 or 52, 53 are deenergized, and the relays 50, 51 or 52, 5 are deenergized.
When the a-contacts CR1, CR2 or CR3, CR4 of 3 are turned off and the voltage supply to the motor section 6A is stopped, the pallet 1 is stopped. At this time, the motor 6 is braked to stop the voltage supply to the brake section 6B, and the solenoid coil 11C is deenergized, so that the pallet 1 can be locked up and down by the locking mechanism. In addition, push button switch 47 or 4 for starting
If the control mode is such that the relays 50 and 51 or the relays 52 and 53 are energized at the same time as 8 is pressed, the push button switch for starting the reaction direction is activated immediately after the stop push button switch 46 is pressed. is pressed (that is, immediately after pressing the stop push button switch 46 during the ascent, the push button switch 48 is pressed).
If the motor 6 is pressed down or the push button switch 47 is pressed immediately after the stop push button switch 46 is pressed during the descent, the motor 6 will instantly reverse, which is dangerous. Therefore, even if the push button switch for starting in the opposite direction is pressed immediately after pressing the stop push button switch 46, the motor 6 will not start until after the motor 6 has completely stopped. For this purpose, the timer 49 is provided. Furthermore, when a chain breakage occurs, the chain breakage is detected by the chain breakage detection device 30 shown in FIG _.
Alternatively, when _36b2 is turned off, the same control mode as when the above-mentioned 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 pallet 1 is kept in a stopped state by the locking mechanism and can be locked up and down. is retained. Therefore, even if the brake section 6B does not function sufficiently undesirably or if a chain breakage occurs, the lifting and lowering lock state of the pallet 1 is maintained.

In the embodiment illustrated in FIG. 1 described above, 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. It may continue to descend due to inertia. 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 that of an induction generator, so that the main winding terminal U of the motor section 6A,
Relay 5 is activated by the self-generated voltage output from V.
The excitation coils 2 and 53 remain in their excitation state. At this time, the output voltage from the main winding tip terminals U and V of the motor section 6A is applied to the rectifier section 6C which supplies the energizing voltage to the brake section 6B in the same way as to the excitation coils of the pallet lowering relays 52 and 53. is also applied, so
An undesirable situation occurs in which the brake release state of the motor part 6A by the brake part 6B is maintained, and the lowering operation of the pallet 1 is continued even though a power outage has occurred. 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 circuit configuration of the motor section 6A shown in FIG. 1 in the case of the present invention, in which reference numeral 6A-1 is a main winding, 6A-2 is an auxiliary winding, and 6A-
3 is the rotor, 6A-4 is the starting capacitor, 6A-
5 represents an operating capacitor, and 6A-6 represents a governor switch.

The motor section 6A shown in FIG. 2 is a so-called capacitor-start induction motor. In other words, the main winding 6A-1 and the auxiliary winding 6A-2 are separated in phase by 90 degrees in electrical angle.
is wound around the stator, and the auxiliary winding 6A is
-2 in series with the starting capacitor 6A-4 and the governor.
A switch 6A-6 is inserted. and,
A running capacitor 6A-5 is connected substantially in parallel with the starting capacitor 6A-4 and a relay 5 for lowering the pallet.
2 or 53 (b contact CR3b of relay 52 in FIG. 2). The governor switch 6A-6 is set to open when the rotational speed of the motor 6 reaches, for example, about 80% of the synchronous speed. Therefore, the operating capacitor 6A-5 is connected to pallet 1.
Valid only when ascending and disconnected when descending. Therefore, even if a power outage or the like occurs during descent, the capacitor capacity 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, when a power outage or the like occurs during descent, the pallet 1 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. This is an example.

In the embodiment shown in FIG. 3, a resistor, a coil,
A power absorbing load 54 such as a lamp is inserted. That is, if a power outage or the like occurs while the pallet 1 is being lowered, the self-excitation of the motor 6 will not occur even if a self-generated voltage is output from the temporary main winding 6A-1 as explained at the beginning of this specification. Since the power generation capacity is small, the self-generated voltage from the motor section 6A is
The pallet lowering relays 52 and 53 are prevented from being energized by being absorbed by the power absorbing load 54 (the voltage is lowered due to the presence of the power absorbing load 54), 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 pallet 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 lock mechanism for holding a pallet on which a vehicle is mounted in a locked state for raising and lowering, a chain disconnection detection device for detecting the occurrence of a disconnection state of a drive chain, and an upper limit position and lower limit position detection means. In addition to being equipped with overload detection means, etc., and controlling the two-stage elevating multi-story parking system accordingly, the two-stage 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 drawings]

Figure 1 is a control circuit diagram that is the premise of the present invention, Figure 2
FIG. 3 is an explanatory diagram of one embodiment of the present invention, FIG. 3 is an explanatory diagram of another embodiment of the present invention, FIG. 4 is an explanatory diagram for explaining the structure of the lock mechanism in the present invention and the previous proposal, and FIG. FIG. 5 is a configuration diagram of an embodiment of the drive chain disconnection detection device according to the present invention and the previous proposal.
FIG. 6 is a schematic side view of an elevating type multi-level parking apparatus to which the present invention is applied, and FIG. 7 is an explanatory view of the operation of the elevating type multi-level parking apparatus shown in FIG. 6. In the figure, 1 is a pallet, 2 and 3 are main columns, 4 is a chain, 5-1 is a lower end locking means, 5-2 is an upper end locking means, 6 is a motor, 6A is a motor part, 6A-1
is the main winding, 6A-2 is the auxiliary winding, 6A-3 is the rotor, 6A-4 is the starting capacitor, 6A-5 is the running capacitor, 6A-6 is the governor switch, 6B
is the brake part, 6C is the rectifier part, 7 is the drive shaft, 8 is the pillow block, 9-1 to 9-3 are the chain parts.
10 is a landing detection device, 11 is a solenoid, 11C is a solenoid coil, 12 is a limit switch, 12a is a contact point, 13 is an arm rotation axis, 14 is an upper arm, 15 is a lower arm, 16
1 is a bar member, 17 is a projection member, 18 is a roller, 1
9 and 22 are claw rotation shafts, 20 is a first claw member,
21 is a second claw member, 23 and 24 are springs, 2
5 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 cut detection device, 31 is a chain contact portion, 32 is a sliding shaft, 33 is a spring, 34 is a detection device housing,
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
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 (1)

[Scope of Claims] 1. A pallet is provided on which a car is mounted, and the pallet is configured to be able to be raised and lowered by a chain driven by an induction motor, and a lock mechanism that holds the pallet in a raised and lowered locked state. , a two-stage elevating multilevel parking system equipped with a lock enabling means for activating the lock mechanism, wherein the induction motor is connected in parallel with the starting capacitor and is disconnected when the pallet is lowered and when the pallet is raised. A driving capacitor is inserted so that the induction motor is connected, and the induction motor is maintained in the braking state in response to the voltage supply to the induction motor being stopped, and the induction motor is maintained in the braking state in response to the voltage supply to the induction motor being stopped. a motor drive which is provided with a brake for releasing the brake state of the pallet, and which supplies voltage to the induction motor and controls the direction of rotation of the motor in the forward and reverse directions in accordance with the upward and downward movements of the pallet. a control unit, a power supply voltage stopping means for detecting an abnormal 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 and stopping the voltage supply in response to the voltage supply to the induction motor. and a lock mechanism control section that controls the lock enabling means to maintain the locking state of the lock mechanism in response to the lock mechanism, and the voltage supply by the motor drive control section detects the release of the lock operation of the lock mechanism. A two-stage elevating multi-level parking system, characterized in that the control is performed as a condition and the supply of power supply voltage to the induction motor is stopped 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 a lock mechanism that holds the pallet in the raised and lowered locked state, and a lock mechanism that operates the lock mechanism. In the two-stage elevating multi-story parking system, the induction motor maintains the induction motor in a brake state in response to the stoppage of 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 rotating direction of the induction motor to be freely forward and reverse in correspondence with the lifting and lowering operations of the pallet. A pallet raising relay is energized in response to the pallet lowering operation, and a pallet lowering relay is energized in response to the pallet lowering operation. 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. a lock mechanism control section that controls the lock enabling means to release the lock mechanism and maintain the lock mechanism's vertically locked state in response to the stoppage of the voltage supply; 2. A two-stage elevating multi-level parking system, characterized in that control is performed on the condition that the unlocking of the locking operation is detected, and the supply of power supply voltage to the induction motor is stopped when the abnormality occurs.