JPH0733735B2 - Mobile parking platform parking system - Google Patents

Abstract

In order effectively to halt movement in a parking system with parking platforms (3) arranged side by side, travelling on a track and each having their own drive (4) on meeting an unexpected obstacle, each platform (3) is fitted on both its sides (9, 10) facing the track with sensors (11) generating a signal on encountering obstacles on the track and this signal actuates a control which reverses the direction of the platform (3).

Description

The present invention relates to a parking system which is movable on railroad tracks and which comprises a plurality of parking pallets arranged individually next to one another, each having a drive.

Such parking systems usually include a number of drive beds which are arranged next to one another and which can be moved individually or in connection on a track, such as a railroad track. With this parking system,
It is possible to park on top of the parking pallets, if possible, to move the parking pallets with motor vehicles, and thus to make space, for example, to reach parking areas located behind these parking pallets, or The parking platform can be aligned with the entrance. By using all the parking pallets so that the required lanes are occupied by such movable pallets, it enables even more effective utilization of the space available for parking vehicles.

It has already been proposed that these carriers are equipped with their own electric drive provided via two lines laid so as to be insulated from each other. Not only the power required directly to the drive for this proposal, but also the control signals required to switch the drive on and off are supplied via the line.

For safety, it is necessary to stop the movement of the parking platform when it encounters an unexpected obstacle. In principle, it is possible to use a signal generated by recognizing such an obstacle to bring all of the parking bed drives to a stop. However, this is particularly desirable when the control signal generated by detecting an obstacle is sent back from the carrier via the control line and must be sent to a central control unit which cannot immediately recognize the control signal. Does not stop moving immediately. This occurs, for example, if the control device is designed to send control signals to the bed over a longer period of time, during which it cannot receive other signals.

The object of the present invention is to provide a general parking system so as to enable a particularly effective stopping in the event of an unexpected obstacle being encountered, even when the signals from the individual loading platforms cannot reach the central control unit. To improve.

The purpose is according to the invention to carry detectors on both sides of the parking lot facing the track in order to generate a signal when each parking platform encounters an obstacle in the track corridor, which signal is used for this parking platform. Achieved in a parking system according to claim 1 in actuating the control device in the opposite direction of the movement of the.

Therefore, the drive of the parking bed that encounters an unexpected obstacle is not only switched off on the one hand, but on the other hand the direction of movement of this parking bed is reversed. This not only causes the parking bed itself to be more quickly braked and even removed from emerging obstacles, it also moves towards any parking bed that follows it. And, because they constitute an obstacle to their trailing parking pallets, these trailing parking pallets are also braked. This reversal occurs only on the parking platform that encounters an unexpected obstacle and occurs independently of the current operating state of the central controller which controls all equipment.

This controller is mechanically interlocked with each other 2
It is particularly advantageous to activate the direction switching means for an electric motor drive with two relays (motor contactors). Whenever the supply voltage supplied via this relay is not applied to this motor, ie each other relay is not connected to the power line, these relays are only capable of switching one relay. Designed to. This means that, for example, drive voltages of different polarities are not simultaneously applied to the DC motor, but only the supply voltage that rotates in the opposite direction when the voltages of each polarity are applied is at least the drive motor's original supply voltage. For a short time
Applied when separated.

It is particularly expedient to have the control device for measuring the force of this drive motor associated with the control device of each carrier and to switch off the drive motor when the predetermined input power is excessive. This makes it particularly clear that the load carrier that encounters an unexpected obstacle and the drive of the load carrier that follows it are switched off when the two load carriers collide as a result of the reversal of the direction of the front load carriers. . This collision of these beds driven in different directions results in an increase in the input power of these drive motors, which switches off the motors of these two beds. When the other trucks run up against the two stationary trucks, these two truck motors are also switched off due to sudden braking,
The input power of these two motors increases. This switch-off occurs independently regardless of whether the central control unit has accepted all signals due to an unexpected emergency stop.

However, in order to increase the safety, a transmitter is additionally provided for transmitting the detector signal to the central controller and the signal is switched off by the central controller for all drives of the bed. It is useful to be generated as. There will be a time delay in switching off all bed drives for the signal which drives the parking bed drive in the opposite direction, preferably with the detectors activated.

In this way, the switching of the drive direction can be generated first, if necessary by individually switching off the following pedestals, and only then the drive of all pedestals is central as an additional safety criterion. Is switched off. When the central control unit transmits signals to these platforms after a predetermined time e.g. once the central control unit is ready to receive the signal from the detector of the front platform, this switch-off occurs with a considerable time delay. Can be performed. Therefore, the central controller cannot receive the switch-off signal during that time.

A detailed description of the invention is given below with reference to the drawings of a preferred embodiment.

FIG. 1 is a plan view of a parking system having three parking pallets on a track.

FIG. 2 is a partially enlarged view of the area A in FIG.

FIG. 3 is a circuit diagram showing a load current circuit of the bed drive motor.

FIG. 4 is a circuit diagram showing the operation of the means for switching the rotation direction.

A parking installation or parking system, which is only partially shown in FIGS. 1 and 2, comprises a haulway having two tracks 1 and 2 placed parallel to each other and electrically insulated from each other, for several parking purposes. The platform 3 is placed on it and can be moved. Each parking platform 3 has its own drive motor 4 and
The respective parking pallets 3 are moved along.

The drive motor 4 is controlled by a centrally arranged central control unit 5 and is connected to one of the two lines 1 and 2 via lines 6 and 7, respectively. Via these lines 6 and 7, not only the supply voltage for the operation of the drive motor, but also the control signals for starting and braking the drive motor in each direction are transmitted. Each parking carrier carries as its part a controller 8 of its own carrier for recognizing and processing the control signals guided via the lines 1 and 2, which is controlled by the central controller 5. The supply voltage is supplied to the drive motor 4 whenever the motor 4 is requested to start. Each parking pallet 3 carries opposite longitudinal sides 9 and 10, each of which is equipped with a detector for detecting obstacles in transit. In the simplest case, the detector may be a universal bearing bar 11 that extends the entire length of the parking platform.
When 11 encounters an obstacle, it turns and actuates the switch accordingly. Other detectors are conceivable, for example light-shielding devices, air-switching devices or contactless switches, for example inductive-acting switches.

In addition, each parking platform carries a shock absorber 12, which allows adjacent parking platforms to act as detectors.
11 (Fig. 2) are supported on each other without actuation. Therefore, during normal operation, the adjoining parking platform should have a universal bearing bar.
11 can move adjacent to each other without actuation. These universal bearing bars 11 operate only for the respective front bed when the bed encounters an unexpected obstacle in the path of travel.

The circuit shown in FIG. 3 firstly comprises a rectifier 13 for rectifying the alternating supply voltage which is conducted via the line. This DC voltage is selectively supplied to the motor 4 in reverse polarity via the motor contactor 14 or the motor contactor 15, that is, the motor contactor 14 causes the motor to rotate in the positive direction,
Causes the motor to rotate in the opposite direction. In addition, both motor contactors 14 and 15 connect the respective signal line 16 and 17 to the signal voltage line 18, respectively, so that a DC signal voltage of, for example, 12V can be used. The signal line 16 or 17 is a signal voltage when the motor is rotating counterclockwise or clockwise, that is, the presence of the voltage of one of the two signal lines indicates that the motor is operating in the positive or the reverse direction. It acts as the signal voltage of time.

Finally, a braking line 19 connecting the two ends of the motor is provided to short-circuit the two ends of the motor when the two motor contactors 14 and 15 are open, ie when the motor is not supplied with supply voltage. Has been. The motor is thereby braked.

The motor contactors 14 and 15 are operated by the circuit shown in FIG. 4 which is operated by a signal sent from the central control unit 5 via said line.

The line 20 that can be connected to the supply line 22 via the coupling relay 21 is
It is provided to activate the motor contactor 14. The operation of the coupling relay 21 causes the supply voltage of the supply line 22 to be applied to the motor contactor 14, thereby applying the supply voltage in the direction of rotation to the motor.

A line 23, which can likewise be connected to the supply line 22 via a coupling relay 24, is provided for actuating the motor contactor 15. The signals for operating the coupling relays 21 and 24 are generated by the central control unit 5 and supplied via the lines 1 and 2.

Both line 20 and line 23 have switches 25 and 26 inserted respectively and these switches are normally closed, and the detector of the bed is
That is, it opens whenever the universal bearing bar 11 operates. Switch 25 is connected to the universal bearing bar on one side of
26 couples to the universal bearing bar on the opposite side of the bed.

When switches 25 and 26 are activated, switches 25 and 26
23 not only separate each, but at the same time another line 23 or
20 is connected to each of the other supply lines 27. This supply line 27 makes available the supply voltage to the motor contactors 14 and 15 in the same manner as the supply line 22. This simultaneous switching therefore acts to open the motor contactor for forward rotation, while the motor contactor for reverse rotation is closed at the same time, and moreover a signal independent of the rotation signal is provided by the central control unit 5. Supplied.

The two motor contactors 14 and 15 are relays that are mechanically interlocked with each other, i.e., this motor contactor can simply be closed whenever the respective other motor contactor is opened. As long as the motor contactor is closed, each other motor contactor is mechanically interlocked and cannot be moved to the closed position. This mechanical interlock is released only when the respective other motor contactor is moved to the open position. As such, it is well known that the contactors are interlocked with each other.

During normal operation, the central control unit 5 transmits a directional signal to a platform in the control unit 8 for this platform so that the coupling relay 21 or the coupling relay 24 closes. The associated motor contactor 14 or 15 is thereby actuated, so that the motor begins to rotate in the predetermined direction. This rotary movement is normally terminated by the corresponding coupling relays which reopen. When the mobile platform encounters an unexpected obstacle here, the universal bearing bar 11 or a detector of other design is activated to open the switch 25 or 26 on the corresponding line 20 or 23 respectively,
This opens the motor contactor even if the associated coupling relay is still closed. After opening the motor contactor and releasing the mechanical interlock, the other motor contactor closes so that the motor rotates in the reverse direction even if the other motor contactor remains open for the coupling relay for this direction of rotation.

The consequent reversal of the parking platform prevents movement in the direction of the obstacle and moves the parking platform away from the obstacle.

Due to the reversal of the direction of rotation, the signal present in the first actuating signal 16 or 17 disappears and the signal voltage replaces the respective other signal line 17 or 16 and is generated. Therefore, this controller can recognize the actual direction of rotation of the drive motor and compare it with the direction of rotation required by the central control unit 5. In the case of an emergency reverse rotation of the drive motor, the control unit detects this from the difference between the demand and the actual direction of rotation and generates an emergency stop signal which is fed from the control unit 8 to the central control unit 5 via a line. . Central controller 5
Switches off all drives on all pallets.

The circuit components used here are not shown individually in the figure, but can be easily achieved by one having ordinary knowledge in the art.

This switch-off of all pallets takes a very long time under some circumstances, i.e. when the central control unit cannot see any input signal.

Despite this, means are further provided for measuring the input power from the input power supply of each drive motor and comparing it with the reference value, in order to brake the operation of the other bed which is not reversed with respect to the direction of movement. . When the input power exceeds this reference value, the respective drive motor can be switched off automatically. For those of ordinary skill in the art, this circuit is easy and well known, and detailed drawings are omitted. This individual switch-off can typically occur when the mobile carrier encounters a carrier whose direction of travel has been reversed due to an obstacle. This switching off is normally effective for both pallets when they are then prevented from moving further. These struck and stationary pedestals are obstacles to the pedestals that follow them, so that the pedestals that follow are also switched off and, as a result, also in all cases, an abrupt obstacle that triggers reverse rotation also follows. Effectively protected from the loading platform. This protection is independent of the central switching off of all platforms provided as an additional safety standard.

Claims (5)

[Claims] 1. A parking system having parking pallets which are arranged alongside one another and move on a track, each of said parking pallets having its own drive means, wherein each of said parking pallets (3) is , Detectors for generating a signal when an obstacle is encountered on a moving aisle (11)
On the both sides (9, 10) of the parking platform facing the railroad track, receiving the signal and changing the rotation direction of the drive motor for driving the parking platform (3), Parking system comprising a control device (8) for reversing the movement of the loading platform (3). 2. The control device (8) actuates a direction switching means for switching the rotation direction of the drive motor (4) as a driving means, the direction switching means comprising two contactors (1).
4, 15) mechanically interlocked with each other so that when one of the contactors' coils is energized, the other contactor of those contactors (14, 15) is held stationary Parking system according to claim 1, characterized in that it comprises two contactors (14, 15) provided. 3. The control devices (8) provided in the parking pallets (3) measure the input power supplied to the drive motor (4), and when the input power is excessive, The parking system according to claim 1 or 2, further comprising a control device that cuts off the supply of input power. 4. Transmitting means are provided for transmitting the signal of the detector (11) to a central control unit (5), which central control unit (5) comprises all of the parking beds (3).
Parking system according to any one of claims 1 to 3, characterized in that it generates a signal for switching off the drive motor (4) to the vehicle. 5. The drive motor for the parking platform (3) having the detector (11) for turning off the drive motor (4) for all the parking platforms (3). The parking system according to claim 4, wherein there is a time delay with respect to the signal (4) that reverses the rotation direction.