JPH0680215A - Drive device for movile shelf system - Google Patents

Abstract

PURPOSE:To prevent a shelf from interfering with receiving and shipping works even when the shelf can not normally be operated by selectively making change- over between the output power of a drive means having a generating means and the output power of an electric power supply means. CONSTITUTION:In a normal condition, a motor M is driven by three phase AC power outputted from an inverter I, so that a plurality of movable shelves are operated so as to be moved respectively. When the movable shelves are in non-operation because of the failures of a control means, power failures and the like, and for instance, when the movable shelf 13 has to be moved, the connecting terminals 20, 21 and 22 of the movable shelf 13 are connected to the connecting terminals 24, 25 and 26 of a drive unit 23 by an operator. Just then, since the common contacts (c)... of respective change-over switches CS1a, CS1b and CS1c are so switched over as to be connected to the other fixed contact (b)... in the movable shelf 13, the operation of a switch STR or a switch STL permits the motor M to be driven by three phase AC power which is generated by a generator G so as to be controlled by an inverter IV, so that the movable shelf 13 can thereby be independently moved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving rack system for controlling the movement of a plurality of shelves so as to optionally form working passages between the shelves, and more particularly to a moving rack system which is normally operated by a power failure or the like. The present invention relates to a drive device capable of moving a shelf when the shelf cannot be moved by an operation.

[0002]

2. Description of the Related Art As is well known, in a shelving system for storing a large number of articles and files, a moving shelving system such as the one mentioned above is often used in order to improve space efficiency. And, in such a moving shelf system, it is common to manually drive each of the shelves to form a work passage corresponding to the work surface of the intended shelf. It becomes difficult to move it manually if it becomes large or the number of shelves is large.

Therefore, conventionally, each shelf is automatically moved by operating a passage selection switch corresponding to the work passage to be formed by providing a self-propelled mechanism on each shelf. Various self-propelled mobile rack systems have been developed in which a passage for use is formed. That is, in this type of moving shelf system, a motor and a passage selecting switch are installed on each of a plurality of shelves set to be movable along a specified rail, and a passage selecting switch provided on an arbitrary shelf A. Each of the shelves is moved by the motor so that the work passage a corresponding to the shelf A is formed by operating the.

A work passage a corresponding to the above shelf A
After the ridge is formed, the work passage a is automatically interlocked so as to be retained. This interlock state is maintained until the operator operates the reset switch installed on the shelf A, for example, when the worker leaves the work passage a.

However, in the above-described self-propelled mobile rack system, for example, if a control system failure or a power failure occurs, the rack cannot be moved even by a normal operation, that is, by operating the passage selection switch. However, there is a problem that the loading and unloading work is greatly hindered until the shelves become self-propelled again by the normal operation.

In this regard, in the conventional moving shelf system, a rotating operation type handle is installed on each shelf, and when a shelf cannot be moved by a normal operation, a worker turns the handle. There are some cases where the shelves can be moved manually by doing so, but the shelves have, for example, a height of about 4 m, a width of about 15 to 20 m, and a depth of about 2.
There is also a large one with a total weight of about 100 tons at 5 m,
It is impossible to move such a shelf manually.

[0007]

As described above, in the conventional mobile rack system, for example, when a failure of the control system or a power failure occurs, the rack is not moved by a normal operation, which is a great problem for loading and unloading work. There is a problem that it causes trouble.

Therefore, the present invention has been made in consideration of the above circumstances. For example, even if the shelf is not moved by a normal operation due to a failure of the control system, a power failure, etc., the shelf can be easily moved to enter. It is an object of the present invention to provide an extremely good moving shelf system drive device that does not cause a great obstacle to the delivery operation.

[0009]

A drive device for a movable rack system according to the present invention is a motor for supplying a power to a motor for each of a plurality of racks movably supported along a specified rail. The present invention is directed to a mobile shelf system in which a supply means is provided and movement control of each shelf is performed to selectively form a work passage between arbitrary shelves. Then, drive means having power generation means and control means for controlling the electric power output from the power generation means by an external operation is provided, and the output power of the drive means and the output power of the power supply means are selectively switched. It is configured to supply to the motor.

[0010]

According to the above structure, the output power of the drive means and the output power of the power supply means are selectively switched to be supplied to the motor. Even if the shelves are not moved by the above operation, it is possible to easily move the shelves so as not to cause a great hindrance to the loading / unloading work.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the overall configuration of the mobile shelf system. In this case, for convenience, the first to second fixed shelves 11 and 12 set at the left end and the right end in FIG. An example in which the third moving shelves 13, 14, 15 are set is shown. These mobile shelves 13, 14,
15 is set so as to be moved by wheels on a common rail 16, and each moving rack 13, 1
Each of the motors 4, 15 is equipped with a motor (not shown) for rotationally driving the wheels, and the movable shelves 13, 14, 15 are moved to the right or left in accordance with the rotation direction of these motors.

Here, the moving rack 13 controls movement and stop of all the moving racks 13, 14, 15 including itself.
A main control device S for managing is installed. The movable shelf 13 is adjacent to the main control device S and passage selection switches PB0 and PB1 for forming working passages between the fixed shelf 11 and the movable shelf 14 which are adjacent to each other. The deceleration detectors G0 and G1 that detect that the distances between the fixed shelves 11 and the movable shelves 14 have become shorter than a certain length, and reduce the moving speed of the movable shelves 13 and 14, and the fixed shelves 11 and the movements that are adjacent to each other. A stop detector PH0, PH1 for detecting that the distance to the shelf 14 has become shorter and stopping the movement of the moving shelves 13, 14 and a safety stop for stopping the movement of the moving shelves 13, 14 by touching. Bar SB1,
SB2 and are installed.

On the other hand, a main control unit S is attached to the movable rack 14.
A sub-control device S1 that controls and manages its own movement and stop based on a command from And mobile shelf 1
4, the distance between the passage selection switch PB2 for forming a working passage between the adjacent movable rack 15 and the adjacent movable rack 15 is shorter than a certain distance, in association with the sub-control device S1. It is detected that the distance between the deceleration detector G2 for decelerating the moving speed of the movable shelves 14 and 15 and the adjacent movable shelves 15 is further shortened, and the movable shelves 14 and 15 are detected. Detector PH2 for stopping the movement of the robot
And safety stop bars SB3, SB4 for stopping the movement of the movable shelves 13, 14, 15 by touching.

Further, on the movable rack 15, the main control unit S
A sub-control device S2 that controls and manages its own movement and stop based on a command from is installed. And mobile shelf 1
5, the distance between the adjacent fixed shelf 12 and the path selection switch PB3 for forming a working path between the adjacent fixed shelf 12 and the sub-control device S2 is shorter than a certain distance. The deceleration detector G3 for detecting that the moving speed of the moving shelf 15 is reduced, and the fixed shelf 12 adjacent thereto.
It is detected that the distance between
A stop detector PH3 for stopping the movement of 5 and safety stop bars SB5, SB6 for stopping the movement of the movable shelves 14, 15 by touching are installed.

Further, the main control unit S and the sub-control units S1 and S2 installed on the movable shelves 13, 14, and 15 are
Moving shelves 13, 1 by means of a signal cable 17 including a power supply line
The cables 4 and 15 are connected so as not to hinder the movement thereof, and power is supplied and data is transmitted between them via the signal cable 17.

The movable shelves 13, 14, 15 are provided with switches CS1, CS2, CS3, respectively. Details of these switches CS1, CS2, CS3 will be described later.

FIG. 2 shows the internal configuration of the main control device S and the sub control device S1. That is, the main controller S
Is supplied with the operation signals of the path selection switches PB0, PB1 and the safety stop bars SB1, SB2 described above, and the detection signals of the stop detectors PH0, PH1 and the deceleration detectors G0, G1. A main control unit 18 that performs a calculation process based on the contents and the detected contents to generate a corresponding control signal and sends it to the signal cable 17 and controls the motor M for causing the movable shelf 13 to self-propell through the inverter I. Is provided.

The sub-control unit S1 includes a main control unit S.
From the control signal transmitted from the signal cable 17 through the signal cable 17, the operation signals of the above-described path selection switch PB2 and the safety stop bars SB3 and SB4, and the detection signals of the stop detector PH2 and the deceleration detector G2 are supplied. By doing
A sub-control unit 19 is provided which performs a calculation process based on the control contents, the operation contents, and the detection contents and controls the motor M1 for causing the movable rack 14 to self-propell through the inverter I1. Note that the sub-control device S2 has a configuration similar to that of the sub-control device S1, and therefore description thereof will be omitted.

Here, as shown in FIG. 3, in the movable rack 13, since the motor M is driven by three-phase AC power, three power supply lines L1, L2, L3 are extended from the inverter I. ing. These three feeders L1, L2, L3
Are connected to the fixed contacts a, a, a of the changeover switches CS1a, CS1b, CS1c, respectively. The other fixed contacts b, b, b of the changeover switches CS1a, CS1b, CS1c are respectively connected to three connection terminals 20, 21, 22 exposed on the side surface of the movable shelf 13, for example.

Further, the changeover switches CS1a, CS1
The common contacts c, c of c are the thermal relay T
It is connected to the motor M via H and TH, and the common contact c of the changeover switch CS1b is directly connected to the motor M. Then, the changeover switches CS1a, CS
1b and CS1c are switched so that their common contacts c, c, c are connected to the inverter I side, that is, one fixed contact a, a, a when the connection terminals 20, 21, 22 are open. With the connection terminals 20, 21, 22 connected to the connection terminals 24, 25, 26 of the drive unit 23, the respective common contacts c, c, c are fixed to the drive unit 23 side, that is, the other side. It is switched so as to be connected to the contacts b, b, b.

Here, the drive unit 23 includes a generator G that generates three-phase AC power, and an inverter IV to which the three-phase AC power generated from the power generator G is supplied via a breaker NFB. , A frequency setter FR for adjusting the output of the inverter IV, a switch STR for controlling the inverter IV so as to generate an output for rotating the motor M in one direction, and an output for rotating the motor M in the other direction. ST that controls the inverter IV
L and the connection terminal 2 which is supplied with the output of the inverter IV and is connectable to the connection terminals 20, 21, 22 of the movable shelf 13.
4, 25, 26.

On the moving shelf 13, the connection terminals 2 are provided together with the changeover switches CS1a, CS1b and CS1c.
0, 21, 22 to the connection terminals 24 of the drive unit 23,
There is provided an open / close switch CS1d as shown in FIG. 4, which is switched between an on state and an off state depending on whether 25 and 26 are connected to each other. Further, in FIG. 1, each of the changeover switches CS1a, CS1b, CS1c
And the open / close switch CS1d are collectively referred to as a switch CS1.

The other movable shelves 14 and 15 have the same structure. In FIG. 1, the changeover switch and the open / close switch provided on the movable shelves 14 are generically expressed as a switch CS2, and the movable shelves 15 are shown. The changeover switch and the open / close switch provided in the above are collectively referred to as a switch CS3. Then, as shown in FIG.
3, 14 and 15 open / close switches CS1d, CS2d and C
S3d is a signal cable 1 so that it is in a parallel relationship with each other.
7 and their both ends have connection terminals 27, 28.
Is connected to a trip terminal of an earth leakage breaker (not shown) of the main control unit S via. This earth leakage breaker is powered by the signal cable 17 to the main control unit S when it is operated by overcurrent or earth leakage, or when any of the open / close switches CS1d, CS2d, CS3d shown in FIG. 4 is turned on. The power supply is cut off, which also cuts off the power supply to the sub-control devices S1 and S2.
It acts so that all operations of the entire system are stopped.

Here, in a normal state where there is no failure or power failure, the drive unit 23 is set to whichever moving rack 1
Do not connect to 3, 14 and 15. Then, in the movable rack 13, the connection terminals 20, 21, 22 are opened, and the common contacts c, c, c of the changeover switches CS1a, CS1b, CS1c are connected to one fixed contact a, a, a. When any of the path selection switches PB0 to PB3 is operated, the motor M is rotationally driven by the three-phase AC power output from the inverter I, and at the same time, the other movable shelves 14 and 1 are moved.
5 is similarly operated to form a desired working passage. Further, in this case, since the open / close switches CS1d, CS2d, CS3d of each of the movable shelves 13, 14, 15 are all in the off state, the earth leakage breaker is also in a state where it can perform the original operation described above.

On the other hand, for example, all the mobile shelves 13, 14, 1
5 is converged on the right side in FIG. 1, the main controller S
When the mobile shelves 13, 14, 15 cannot be moved even if the passage selection switches PB0 to PB3 are operated due to a failure of the sub-control devices S1 and S2, a power failure, or the like, for example, When it is necessary to move the worker, the worker is required to connect the connection terminals 20, 21, 22 of the moving shelf 13.
The connection terminals 24, 25, and 26 of the drive unit 23 are connected to. Then, on the moving shelf 13, each changeover switch CS
Since the common contacts c, c, c of 1a, CS1b, CS1c are switched so as to be connected to the other fixed contacts b, b, b, by operating the switch STR or STL, it is controlled by the inverter IV. The motor M is rotationally driven by the phase AC power, and the movable rack 13 can be independently moved in a desired direction.

Further, in this case, since the open / close switch CS1d of the movable rack 13 is in the ON state, the trip terminal of the earth leakage breaker is short-circuited and is in the same operating state. Therefore, in the state where the movable rack 13 is moved by the output power of the drive unit 23, the operations of the main control device S and the sub control devices S1 and S2 are surely stopped, and the movement is performed when, for example, the power failure is released. The inconvenience that the shelves 14 and 15 suddenly start moving is prevented. Further, the moving speed of the movable rack 13 at this time is controlled by adjusting the frequency setting device FR, and normally, it is desirable to set the moving speed to be slower than the moving speed by the output of the inverter I.

As in the case of the movable rack 13, the other movable racks 14 and 15 can be independently moved at desired speeds by selectively connecting the drive unit 23. Of course, you can

Therefore, according to the configuration of the above embodiment, the driving unit 23 is selectively connected to the moving shelves 13, 14, 15 and the moving shelves 13, 14, 15 are driven by the output power of the driving unit 23. Therefore, even if the movable shelves 13, 14, 15 are not moved by a normal operation due to a failure or a power failure of the main control device S and the sub-control devices S1, S2, the movable shelves can be easily moved. 13, 14, 15
Can be moved so as not to cause a major obstacle to the loading / unloading work. Further, since the drive unit 23 only needs to have a function of moving one of the movable shelves 13, 14 and 15, the built-in generator G having a small capacity can be used.

FIG. 5 shows another embodiment of the present invention. When the same parts as those in FIG. 3 are designated by the same reference numerals, the three connection terminals 20, 21, 22 connected to the motor M are shown.
Are integrated as a connector 29 and extend to the outside of the movable shelf 13. The three power supply lines L1, L2, L3 extending from the inverter I are connected to the connection terminals 30, 31, 32 exposed on the side surface of the movable shelf 13, respectively. These connection terminals 30, 31, 32 include
The connection terminals 20, 21, 22 of the connector 29 are connected to each other.

Normally, by connecting the connection terminals 20, 21, 22 of the connector 29 to the connection terminals 30, 31, 32 respectively, the motor M is supplied with the three-phase AC power output from the inverter I. It is designed to be rotated. Further, when a failure or a power failure occurs, the worker removes the connection terminals 20, 21, 22 of the connector 29 from the connection terminals 30, 31, 32, and drives the drive unit 2
By connecting to the three connection terminals 24, 25, and 26, the motor M can be rotationally driven by the three-phase AC power output from the inverter IV. The present invention is not limited to the above-described embodiments, but can be variously modified and implemented without departing from the scope of the invention.

[0031]

As described above in detail, according to the present invention,
For example, even if the shelf is not moved due to normal operation due to control system failure or power failure, it is possible to easily move the shelf so that there is no major obstacle to loading and unloading work. A device can be provided.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a drive device of a movable shelf system according to the present invention.

FIG. 2 is a block configuration diagram showing details of a main control device and a sub control device of the embodiment.

FIG. 3 is a block configuration diagram showing details of a main part of the embodiment.

FIG. 4 is a circuit configuration diagram shown for explaining the operation of the open / close switch of the same embodiment.

FIG. 5 is a block diagram showing another embodiment of the present invention.

[Explanation of symbols]

11, 12 ... Fixed shelf, 13-15 ... Moving shelf, 16 ... Rail, 17 ... Signal cable, 18 ... Main control unit, 19 ... Sub control unit, 20-22 ... Connection terminal, 23 ... Driving unit,
24-28 ... Connection terminal, 29 ... Connector, 30-32 ...
Connecting terminal.

Claims (1)

[Claims] 1. A motor and power supply means for supplying electric power to the motor are provided on each of a plurality of shelves movably supported along a specified rail, and the shelves are controlled to move freely. In a movable rack system for selectively forming a work passage between racks, drive means having a power generation means and a control means for controlling the electric power output from the power generation means by an external operation is provided. Is configured to selectively switch the output power of the power supply unit and the output power of the power supply unit to supply the motor to the motor.