JPH0323162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motorized movable shelf capable of forming a plurality of working paths.

Electrically operated movable shelves are already known in which the movable shelves are moved by a selection operation of an opening command switch to open designated spaces between shelves to form a work passage. Additionally, multi-aisle electric movable shelves are already known, which allow work passages to be formed in multiple locations so that multiple workers can simultaneously load and unload articles from different aisle locations. ing.

However, with conventional multi-aisle electric movable shelves, the width of the aisles that can be formed is fixed, and therefore the number of aisles that can be formed is also limited, which limits the efficiency of loading and unloading work. .

An object of the present invention is to make it possible to form a passageway of any width between each shelf, and therefore to make it possible to form a minimum passageway according to necessity at any position for articles. To provide an electric movable shelf that can further improve the efficiency of loading and unloading work.

The present invention will be explained below with reference to illustrated embodiments.

In FIG. 1, reference numeral 21 is a circuit board built into the fixed shelf, and 22a, 22b, and 22c are circuit boards built into the movable shelf. It is assumed that the fixed shelves and movable shelves having these circuit boards are arranged in order, with the fixed shelf at the left end and the movable shelf at the right end. The circuit board 21 of the fixed shelf has an open command and passage lock circuit 23, a right-hand command circuit 25, an all command detection circuit 26, a double command detection circuit 27, an abnormal state detection circuit 28, and an operation signal generation circuit 34. Furthermore, even if the aisle width formed between the shelves is less than the specified aisle width, a stop pulse signal is forcibly issued by inputting a signal from a double command detection circuit, etc. It has a full stop command circuit 30 that can perform a full stop command. On the other hand, the circuit boards 22a, 22b, 22c of each movable shelf provide the open command and passage lock circuits 23a, 23b, 23, respectively.
c, left row command circuits 24a, 24b, 24c, right row command circuits 25a, 25b, 25c, all command detection circuits 26a, 26b, 26c, double command detection circuit 2
7a, 27b, 27c, abnormal state detection circuit 28
a, 28b, 28c, stop limit detection circuit 29
a, 29b, 29c, motor control circuit 31a,
31b, 31c, in-operation detection circuit 32a, 32
b, 32c, and motor drive parts 33a, 33
b, 33c. Each circuit board 21, 22
Passage width regulating switches 3, 3a, 3b, and 3c are connected to the opening command and passage lock circuits 23, 23a, 23b, and 23c of a, 22b, and 22c, respectively. These passage width regulation switches 3, 3a,
3b and 3c are designed so that, for example, a swing arm is extended between adjacent shelves, and the swing arm is turned off when the working path between the shelves reaches a specified width and the swing arm rotates to a specified angle. do. Of course, other appropriate passage width detection means may also be used. Each open command and passage lock circuit 2
3, 23a, 23b, 23c are open command switches 9, 12a, 12b, 1 for each shelf.
When 2c is pressed and turned on, an open command signal is input, and when the passage width regulating switches 3, 3a, 3b, and 3c are turned off, a lock signal is input. It's getting old. The open command and passage lock circuit 23 of the circuit board 21 of the fixed shelf inputs a signal to the right row command circuit 25 by inputting the open command signal, and the output signal of the right row command circuit 25 is input to the circuit board 22a of the adjacent shelf. The signal is input to the right row command circuit 25a and also to the motor control circuit 31a. Open command for each movable shelf and passage lock circuit 23a, 23b,
23c, when an open command signal is input by operating the open command switch on each shelf, the left command circuits 24a, 24b,
24c and right row command circuits 25a, 25b, and 25c, a left row signal and a right row signal are inputted, respectively. Left row command circuits 24a, 24b for each shelf,
24c receives a signal from the left-hand command circuit of the adjacent shelf opposite to the right-hand command circuit;
Further, the outputs of the respective left-hand command circuits are input to the motor control circuits 31a, 31b, and 31c of the respective shelves. Each shelf is provided with a total command detection circuit 26, 26a, 26b, 26c, and when a command signal for forming a passage is issued,
A signal is inputted from the above-mentioned all command detection circuit to the operation signal generation circuit 34 of the fixed shelf.

Each shelf has dual command detection circuits 27, 27a, 27
b and 27c are provided, and their outputs are input to the full stop command circuit 30, respectively.
Abnormal state detection circuits 28, 28 provided on each shelf
The outputs of a, 28b, and 28c are all input to a full stop command circuit 30. The output of the full stop command circuit 30 is input to the open command and passage lock circuits 23, 23a, 23b, 23c of each shelf, and the motor control circuits 31a, 3 of each movable shelf.
1b and 31c. Stop limit detection circuits 29a, 29b for each movable shelf,
29c emits a signal when it comes into contact with an adjacent shelf, for example, and this signal is input to the motor control circuits 31a, 31b, and 31c of the shelves, respectively. Each motor control circuit 31a, 31
The outputs of b and 31c are the motor drive unit 33 of each shelf.
It is designed to be input to each of a, 33b, and 33c. Output signals from the in-operation detection circuits 32a, 32b, and 32c for detecting that the shelves are moving are input to an operation signal generation circuit 34. Each shelf has stop switches 10, 13a, 1
3b and 13c are provided. These stop switches are connected in series to each other and to the full stop command circuit 30, and when any one of the stop switches is operated and turned off, a signal is input to the full stop command circuit 30. ing. A stop signal from the full stop command circuit 30 is applied to the motor control circuit of each shelf to stop the travel of each movable shelf, and is also applied to the open command and aisle lock circuits 23, 23a, 23b, and 23c of each shelf. Of these circuits 23, 23a, and 23b, a lock signal i is applied from the open command and aisle lock circuit of the shelf whose open command switch is operated to the motor control circuit of the adjacent shelf. The full stop command circuit 30 is connected to a gate circuit such as an OR circuit so as to output a lock signal i and a stop signal when a signal is input from any of the double command detection circuit, abnormal state detection circuit, or stop switch circuit. It can be configured accordingly.

In addition, when increasing the number of movable shelves, provide a circuit board with the same configuration as the circuit board of each movable shelf as shown in the figure, and connect them in the same way as the mutual board connections shown in Fig. 5. do it.

If you want to create a passage between a fixed shelf and an adjacent movable shelf when all fixed shelves and movable shelves are gathered together, press the open command switch 9 of the fixed shelf. Turn this on. The switch 9 inputs an open command signal to the open command and aisle lock circuit 23, which circuit 23 applies a signal as an open command signal to the right row command circuit 25. A rightward signal is applied to the command circuit 25a, and the motor control circuit 31a
Add right row signal to . The right row command circuit 25a inputs a right row signal to the right row command circuit 25b of the shelf adjacent to the right side, and this right row command circuit 25b further inputs a right row signal to the right row command circuit 25c of the shelf adjacent to the right side, and controls each motor. A right row signal is applied to circuits 31b and 31c. Each motor control circuit 31a, 31b, 31
c closes the normal rotation circuit of the drive motor in each motor drive section by inputting the right-hand signal, causes each movable shelf to travel to the right, and creates a passage between the fixed shelf and its adjacent shelf. Form. When the passage reaches a specified width, the passage width regulating switch 3 is turned off, and a stop signal is input to the opening command and passage lock circuit 23. When the stop signal is input, the circuit 23 stops outputting the right-going signal to the right-going command circuit 25 to stop the movement of all movable shelves, and also stops the movement of all movable shelves facing the aisle, that is, the second from the left. A lock signal i is applied to the motor control circuit 31a of the shelf to lock the shelf so that it cannot move until the switch 9 is returned to its original state.

After a passage has been formed between the desired shelves in this manner, when the passage is to be formed at another position, the opening command switch corresponding to the position where the passage is to be formed is operated. For example, when the switch 12a is operated, an open command signal is applied to the open command and passage lock circuit 23a, and based on this signal, the leftward command circuit 2
A left row signal is applied to 4a, and a right row signal is applied to right row command circuit 25a. This right row signal is sequentially applied to right row command circuits 25b and 25c on the right side. However, as mentioned above, the second shelf from the left cannot be moved because it is interlocked.
Only the two shelves on the right side move to the right, and a passage is also formed between the second shelf and the third shelf from the left. When the aisle reaches the specified width, the aisle width regulating switch 3a is activated, and an opening command and a stop signal are input to the aisle lock circuit 23a.Based on this, the movement of the shelves is stopped as in the case described above. The shelf facing the aisle is interlocked and is restrained from moving unless the switch 12a is reset.

In this way, each movable shelf is not interlocked and can be moved even if a passage is formed elsewhere as long as there is a margin for movement, thus forming multiple passages. becomes possible.

All command detection circuits 26, 26 provided on each shelf
a, 26b, and 26c output a signal when each shelf is moving, and when even one of the signals is output, this signal is input to the operation signal generation circuit 34. It's summery.

Each double command detection circuit 27, 27a, 27b, 2
7c detects when the open command switch of another shelf is operated while one of the shelves is moving and outputs a double command signal. When the heavy command signal is issued, this signal is input to the all-stop command circuit 30, and all moving shelves are stopped via the all-stop command circuit 30. Even if any open command switch is operated while all the shelves are stopped, no double command signal will be output.

Next, specific examples of the open command and passage lock circuit and the operation signal generation circuit will be explained together with an example of the accompanying lighting circuit. In FIG. 2, when the open command switch 9 is not operated, the output of the input circuit _A1 becomes "L", and this output is sent to the AND circuits _a1 , _a2.
It is also applied to the OR circuit O ₁ side of the flip-flop circuit FF consisting of the OR circuits O ₁ and O ₂ via the inverter I ₁ . The output of the AND circuit _a1 is input to the OR circuit _O2 side. flip-flop circuit
The output of the OR circuit _O1 constituting the FF is the lock signal i
The output of the other OR circuit _O2 is applied to the AND circuit _a2 as well as to _the motor control circuit as described above. and circuit
The output of _a2 is an OR circuit as a passage formation command signal.
Ready to be added to _O5 . The passage width regulation switch 3 is turned on when the passage width is less than a specified width, and at that time, the output of the input circuit A ₂ becomes "H", and the input circuit A ₂
The output of is applied to AND circuit _A2 , and also to OR circuit _O3 via inverter _I3 . OR circuit O ₃ has full stop command circuit 30
A stop signal f from . Switch LS is a limit switch,
If there is even a slight gap between the shelf and the adjacent shelf, the switch is turned off and the output of the input circuit _A3 becomes "L". The output of input circuit _A3 is input to AND circuit _a3 . The AND circuit a ₃ also receives a dark signal j from an illuminance detection device (not shown).
is inputted, and the output of the AND circuit _a3 is inputted to a lighting device (not shown) via an inverter _I4 . Signals similar to the passage formation command signal can be obtained in each of the other movable shelves by a similar circuit configuration, and each of these signals is applied to OR circuits O ₆ and O ₇ in each shelf. It's becoming like that.
Then, the output of OR circuit O ₇ on the right shelf is sequentially input to OR circuit O ₆ on the adjacent shelf on the left, and the output of OR circuit O ₆ is further sequentially input to OR circuit O ₅ on the left shelf. ing. The output of OR circuit _O5 is inverted and applied to OR circuit _O4 , and the other input of OR circuit _O4 is grounded. The output of OR circuit O ₄ is a one-shot multivibrator
The output Q of the vibrator OSM is applied to the OR circuit _O8 . Each movable shelf is provided with OR circuits O ₉ and O ₁₀ to which signals from the in-operation detection circuit are input, and the output of the OR circuit O ₁₀ of the shelf on the right is the output of the OR circuit O ₉ of the adjacent shelf on the left. The output of OR circuit O ₉ is applied to OR circuit O ₈ on the adjacent shelf on the left. The output of the OR circuit _O8 is applied to the OR circuit _O3 as an operating signal for that shelf via the inverter _I2 and the differential circuit DF, and is also applied to other movable shelves with a similar circuit configuration as an operating signal. It is now available to be added. Although the configuration of the upper halves of the circuit boards 22a and 22b is omitted in FIG. 2, it is assumed that the circuit configuration is the same as that of the upper half of the circuit board 21.

It is now assumed that all the shelves are stopped in a converged state. When the open operation switch 9 is turned off, the output of the input circuit A ₁ is "L", the output of the AND circuit a ₁ is "L", and the input of O ₁ of the OR circuits O 1 and O ₂ forming the flip-flop circuit _FF is "H", its output is "L", the input of _O2 is "L", and its output is "H". Also, there is no input of the stop signal f, so the signal f is "L", and the passage width regulation switch 3 is on because the passage is narrowed, and the output of the input circuit _A2 is "H". So, the AND circuit
The input signal C of _a2 is "H", the output of input circuit _A2 is inverted to "L" by inverter _I3 , and the input e of the OR circuit is "L". Furthermore, since there is no operation signal input from OR circuit _O8 , the OR circuit
The operation signal g to _O3 is also "L".

Then, in order to form a passage, switch 9 is turned on.
When turned on, the output of input circuit _A1 becomes "H", and the output of AND circuit _A2 becomes "H". This "H" signal is applied as a right row and left row command signal to the right row command circuit and left row command circuit of each shelf,
Here, as described above, a passage is formed at a position corresponding to the open command switch 9. When the passage width reaches the specified width and the passage width regulation switch 3 is turned off, the signal C applied to the AND circuit _a2 becomes "L", and the output of the AND circuit _a2 , that is, the open command signal becomes "L". ' and the movable shelf will stop. On the other hand, due to the passage width regulation switch 3 being turned off, the input signal e to the OR circuit _O3 becomes "H".
Therefore, one input signal d to the AND circuit _a1 also becomes "H". Since the other input of the AND circuit _a1 has already become "H" due to the operation of the open command switch 9, the output of the AND circuit _a1 becomes "H".
Flip-flop circuit FF is inverted, and the output of its OR circuit _O1 becomes "H". This "H" signal is applied to the motor control circuit as a lock signal i, and locks the movable shelf facing the aisle against movement, as described above.

The conditions for the output of the AND circuit _a3 to become "H" are that the shelf is in contact with the adjacent shelf, the limit switch LS is turned on, the signal h becomes "H", and the lock signal i is "H" as described above. When all the above three conditions are satisfied: the signal j becomes "H" and the illuminance detection device detects that the surrounding brightness has fallen below a certain level. It is. When the output of AND circuit _a3 becomes "H", inverter _I4
The lighting device lights up through the.

The stop signal f is input from the full stop command circuit 30 in FIG. Therefore, the stop signal f is issued when a command is issued twice while the shelves are moving, when an abnormal condition such as a person being caught between shelves is detected, and when an emergency stop switch is issued. is operated, and in any of these cases, AND circuit a ₁ is activated on the condition that the open command switch for that shelf is operated.
The output of becomes “H” and the flip-flop circuit
A lock signal i is output from the FF.
Therefore, during the passage forming operation, by operating the open command switch of the shelf other than the shelf facing the passage that is being formed and setting it to the double command state, the movement of the shelves is stopped and the opening command switch of the shelf other than the shelf facing the passage that is being formed is stopped. Unless the opening command switch for the shelf facing the aisle is released, the shelf facing the aisle will be interlocked. Since the lock signal i is not applied to the motor control circuits of the shelves other than those facing the aisle, the shelves other than those facing the aisle can be moved by issuing a new open command as long as there is room for movement. can do. Therefore,
A plurality of passages, and passages of any width, can be formed at any position.

In addition, in the circuit shown in Figure 2, when an opening command operation is performed to form a passage between certain shelves, since there is no movement margin for the specified passage width, the adjacent shelf may shift to some extent. The lock signal i is also generated when the stop limit detection circuit is activated. That is, when the movement of the shelf stops due to the operation of the stop limit detection circuit, the detection signal from the operating detection circuit of the shelf that was moving until then falls due to the stop of movement of the shelf, and this detection signal is output to the OR circuit.
After passing through O ₉ or O ₁₀ , and further passing through OR circuit O ₈ , it is inverted by inverter I ₂ , and the differential circuit DF
Since the "H" signal is instantaneously generated, the lock signal i will be output from the flip-flop circuit FF and the shelf will be locked, provided that the open command switch for that shelf is operated. be.

By the way, if the signal g applied via the inverter _I2 and the differential circuit DF is only the signal from the in-operation detection circuit, the shelves will not open even if the opening command switch is operated to form a passage between the desired shelves. If there is no margin for movement, no in-operation detection signal is output, and therefore the movement of the shelf facing the aisle cannot be locked. However, according to the circuit shown in FIG. 2, even if the in-operation detection signal from the in-operation detection circuit is not input, the open command signal issued by operating the open command switch of any shelf will be output to the OR circuit O. ₃ , is applied to the one-shot multivibrator OSM via _O4 , the multivibrator is activated, its output Q rises, and falls after a preset time, and this signal is applied to the OR circuit _O8 , inverter _I2 , It is added to the OR circuit _O3 via the differentiator circuit DF. Therefore, in the OR circuit O ₃ ,
When the output signal of the multivibrator OSM falls, that is, at the moment when the output of the inverter _I2 rises, an "H _" signal is added as the signal g. This signal is applied to the AND circuit _a1 via the OR circuit _O3 , and the AND circuit _a1 outputs an "H" signal on the condition that the open command switch on the shelf is operated. Based on flip-flop circuit FF
A lock signal i is output from the shelf, and the shelf facing the aisle is locked for the first time. As is clear from the above explanation, the OR circuit
O ₅ , O ₄ , One Shot Multivibrator OSM
The portion having the above corresponds to the operation signal generation circuit 34 in FIG.

The circuit shown in Figure 2 can be constructed from semiconductor logic circuits, but if this is further integrated into an integrated circuit, noise countermeasures must be taken, so the input circuits A ₁ , A ₂ , and A ₃ are Special measures have been taken, such as installing

Therefore, a signal delay occurs between each control circuit. However, the operation signal generation circuit 34 as described above
By providing this, it is also possible to prevent unnecessary locking.

FIG. 3 shows a specific example of the dual command detection circuit. In Fig. 3, a stop signal K is outputted via AND circuit a ₄ and OR circuit O ₁₂ by inputting the open command signal and the detection signal from the full command detection circuit, and a detection signal from the double command detection circuit is output. In response to the input of , a stop signal K is outputted via the OR circuit _O12 .

Figure 4 shows a protection timer circuit in case the passage width regulating switch fails, and the counter CNT is activated by the oscillator OSC by inputting the signal l accompanied by the open command.
When the count value reaches a predetermined value, a stop signal m is output from the output terminal _Q10 of the counter CNT, and this stop signal m is input to each shelf to stop the movement of the shelves. It will be done. That is, even if the passage width regulating switch fails, the shelf will be stopped after the time set by the timer circuit has elapsed, and the shelf and circuit will be protected.

As described above, according to the present invention, during the passage forming operation, the movement of the shelves is stopped by operating the open command switches of the shelves other than the shelves facing the passage that is being formed to enter the double command state. At the same time, unless the opening command switch for the shelf facing the aisle that is being formed is released, the interlock facing the aisle will be applied, so it is possible to form a aisle of any width as needed. , and it is also possible to create multiple passages by newly forming passages at different positions. In addition, if you stop all the shelves in a double command state when one passage with the necessary and sufficient width is formed, you can move them to another position at any time and with any width as needed. It is possible to form a passageway, thereby improving the efficiency of loading and unloading work of articles.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention;
Fig. 2 is a circuit diagram showing a specific example of the part including the open command and passage lock circuit and the operation signal generation circuit in the above embodiment, and Fig. 3 shows a specific example of the double command stop circuit in the above embodiment. Circuit Diagram FIG. 4 is a block diagram showing an example of a protection timer that can be used in the present invention. 9, 12a, 12b, 12c... Open command switch, 3, 3a, 3b, 3c... Passage width regulation switch, 23, 23a, 23b, 23c... Open command and passage lock circuit, 24a, 24b, 24c...
Left row command circuit, 25, 25a, 25b, 25c...
...Right row command circuit, 27, 27a, 27b, 27c
...Double command detection circuit, 28, 28a, 28b,
28c... Abnormal state detection circuit, 30... Full stop command circuit, 31a, 31b, 31c... Motor control circuit, 34... Operation signal generation circuit.

Claims (1)

[Scope of Claims] 1. An opening command switch provided corresponding to each shelf; A reversible shelf driving motor provided for each shelf; A reversible motor provided corresponding to each shelf; an open command and aisle lock circuit capable of outputting a rightward or leftward signal by operating an open command switch and outputting a lock signal when the shelf is stopped; A motor control circuit that controls the reversing motor in forward and reverse directions, and a motor control circuit that is provided corresponding to each shelf to detect when the open command switch of another shelf is operated while one of the shelves is moving. A double command detection circuit that outputs a double command signal, and a signal from this double command detection circuit as input,
and a full stop command circuit that forcibly issues a stop signal if any one of the double command detection circuits outputs a double command signal when a passage with a width less than a specified passage width is formed, and the full stop command circuit as described above The all-stop command circuit is connected to the motor control circuit of each shelf so that a stop command is issued to the motor control circuit of each shelf in response to a stop signal from the all-stop command circuit. Then, a lock signal is applied to the motor control circuit of the shelf facing the aisle through the open command and aisle lock circuit for the shelf facing the aisle where the open command is issued, and the open command for each shelf is applied to the all-stop command circuit and the open command for each shelf. An electric movable shelf that is connected to an aisle lock circuit.