JPS6156123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a remotely controllable mobile shelf device.

(Prior art) By selecting an aisle selection switch, the movable shelf to be moved and the direction of its movement are determined from the relationship between the designated aisle position and the position of the movable shelf at that time, and this determination is made. Accordingly, a movable shelf apparatus is already known in which a movable shelf is moved by electric power to form a working path at a designated position. Loading and unloading of articles into and out of such movable shelving devices may be carried out using a forklift, etc. In that case, it would be convenient if the operator of the forklift could operate the forklift remotely from the top of the forklift, etc. This is preferable from the viewpoint of safety because it is less likely that an operator will accidentally get caught between the shelves, and there will be no chance of injury even if an item stored on the shelves falls.

Therefore, the present applicant previously filed a patent application for a movable shelf device that can form a working path by remote control. The invention disclosed in Japanese Unexamined Patent Publication No. 59-64403 is one of them.

(Objective) An object of the present invention is to provide a movable shelf device that is capable of forming a working passage by remote control. Even if the opening operation command signal is issued by remote control in order to form
The first working path forming operation is not stopped until the working path forming operation based on the first command signal is completed, so that, for example, when multiple open command signals are issued, all movable shelves are It is an object of the present invention to provide a movable shelf device which eliminates the possibility that the operation stops or that an opening command signal issued later takes priority and a path forming operation is performed based on this command signal.

(Configuration) The present invention is characterized by a changeover switch that switches between a remote control mode and a manual direct control mode;
A gate circuit that opens the gate only when the mode selector switch is switched to remote control mode and allows the opening operation command signal input remotely to pass through, and a gate circuit that allows the opening operation command signal input through this gate circuit to be moved. and an opening signal output section that is introduced into the control circuit of the movable shelf on the condition that the shelf is stopped, and maintains the opening operation command signal until the passage forming operation based on the opening operation command signal is completed. There is a particular thing.

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

In FIG. 1, reference numerals 1 and 1a indicate shelves, and the leftmost shelf 1a is a fixed shelf installed immovably on the floor, while the other shelves are collectively clustered together with the fixed shelf 1a, In addition, the shelves are movably arranged so as to be spaced apart from each other so as to form a working passage between the shelves. Each movable shelf 1 has a passage forming control circuit board 22, and the fixed shelf 1a has a main circuit board 22a, a circuit board that includes a receiving circuit for signals sent by remote control, and a discriminating circuit for received signals. It has 23. The side panel of each shelf 1, 1a is provided with an operation panel 2 to which a path formation command signal can be input by direct manual operation, and the side panel of the fixed shelf 1a is further provided with a general operation panel having a power switch, etc. 2a is provided. A passage width detection member 40 is provided between the top plates of adjacent shelves, which swings according to the width of the passage between both shelves, and which emits a signal when the passage reaches a predetermined width. . The symbols, ,... indicate passage numbers formed between the shelves.

FIG. 2 shows a transmitting device for remotely controlling the movable shelving device shown in FIG. 1, and each transmitting device a, b corresponds to a passage number in the movable shelving device Push button switch 25 for selecting and emitting a signal, push button switches 27 and 28 for switching between remote control and direct operation, emergency stop push button switch 29, power on/off switch 30, push and a switch 26 for releasing the switch.

Next, an example of the circuit configuration used in the present invention will be explained. In FIG. 3, reference numeral 22a indicates a main circuit board, and 22 indicates a circuit board provided on each movable shelf. The circuit configuration of each board 22, 22a itself is the same as that used in already known electric movable shelves, for example,
The circuit configuration described in Publication No. 163944 may be selected and adopted as appropriate. Adjacent circuit boards are connected to each other for input/output of right row signals, left row signals, stop signals, etc.Also, each circuit board is connected to an AC power source for power as well as a DC power circuit. DC power is supplied from. In the same figure, symbols a and b indicate the transmitting devices described in FIG. have. Various signals emitted from these transmitters using radio waves or the like as a medium are received by the receiving circuit 37 in the circuit board 23 described with reference to FIG. The transmission and reception of this signal is performed, for example, after a discrimination counter pulse of a certain width, a first path signal, a second path signal, and a second path signal.
Passage signal, …… Nth passage signal, signal for mutually switching between automatic operation mode by remote control or direct operation mode by manual operation, open command or its release signal, emergency stop signal, etc. are repeated in sequence. This can be done by placing the signal on a carrier medium, receiving it by the receiving circuit 37, and detecting the wave. The above-mentioned signal received by the receiving circuit 37 is sent to the signal discrimination circuit 36, and the signal discrimination circuit 36 recognizes the first, second,...N-th path signals R ₁ ,
It is designed to determine the presence or absence of R ₂ , ......R _N and input the respective path signals to the corresponding open command signal input terminals O ₁ , O ₂ ......O _N of the circuit boards 22, 22a. . The signals inputted to the open command signal input terminals O ₁ to O _N may be considered to be the same signal as the open command signal input directly manually in a conventional mobile shelf. The signal discrimination circuit 36 also discriminates whether automatic operation is performed by remote control or direct manual operation, and in the case of remote control, the lock signal Lo is not activated unless a release signal is input after the passage is formed based on the open command signal. The signal is output and input to all the circuit boards 22 through the leftmost circuit board 22a. The lock signal Lo is also output when an emergency stop signal or the like is input. The signal discrimination circuit 36 is configured to receive an in-operation signal Dr indicating that the movable shelf is in operation from the left-most main circuit board 22a. In FIG. 3, symbols 5A and 5B are light emitters, 6A and 6
B is a light receiver. The light emitter 5A and the light receiver 6A, and the light emitter 5B and the light receiver 6B each form a set, and one set of the light emitter 5A and the light receiver 6A is closer to the movable shelf than the other set of the light emitter 5B and the light receiver 6B. When a person or a forklift enters the passage formed between the shelves, the light from the light receiver 5A is blocked, and then the light from the light emitter 5B is blocked, and vice versa. When exiting from the passage, the light from the light emitter 5B is shut off, and then the light from the light emitter 5A is shut off. The signal discrimination circuit 36 receives signals from the light emitters 6A and 6B, and receives signals from the light receivers 6A and 6B.
Based on the signal from 6B, the lock signal Lo is output or stopped, and a counter (to be described later) is incremented/subtracted.

Next, a detailed configuration example of the signal discrimination circuit 36 will be explained. In FIG. 4, receiving circuits 37a, 3
7b receives the signals from the transmitting devices a and b separately, and the receiving circuit 37a
For example, when the first path is selected or released by the transmitting device a, the received signal is transmitted to the first path of the three open/release control circuits 108a included in the discrimination circuit 36. For example, when the third path is selected or released by the transmitter a, the received signal is sent to the opening/release control circuit 108 of the set of opening/release control circuits 108.
The signal is sent to the third open/release control circuit in section a. Similarly, receiving circuit 37b
When receiving the passage signal or its release signal selected by the transmitting device b, the circuit selects the opening corresponding to the selected passage number from among the three opening/cancellation control circuits 108b included in the discrimination circuit 36. - A signal is input to the release control circuit. Open/release control circuits 108a and 108b each form a pair.
are in a set of three in the illustrated example, but this means that the number of passages that can be formed is three; on the other hand, when five passages can be formed as in the example in Figure 1, is a set of 5, so if the number of paths that can be formed is 5 and the number of transmitters is 2, the opening and
A total of 10 release control circuits will be provided.
The open signal or the release signal from the control circuit corresponding to the first path among the opening/release control circuits 108a forming the first set is transmitted to the first path among the opening/release control circuits 108b forming the second group. The second,
The opening signal or the release signal from the control circuit corresponding to the third passage is applied to the control circuits corresponding to the second and third passages among the opening/cancellation control circuits 108b forming the second set. ing. Second
Each open/release control circuit 108b forming the set determines the presence or absence of an open signal or a release signal for each passage, and sends the determined signal to the open/release determination circuit 1.
00a, 100b,... _100N are input.

In FIG. 4, each receiving circuit 37a, 37b
When receiving a remote control or manual direct control switching signal, the remote/manual switching circuit 10 transfers the signal to the remote/manual switching circuit 10.
4, and when the switching circuit 104 receives a signal indicating remote control, the switching circuit 104 switches the open/release discrimination circuit 10.
0a, 100b, 100 _N are effectively activated, and on the other hand, when a signal indicating manual operation is input, the operation of the discrimination circuits 100a, 100b, 100 _N is stopped, and remote control is performed by each transmitter a, b. It has become impossible to operate. Each open/release discrimination circuit 100a, 100b, _100N is provided corresponding to the first, second, and Nth passage, respectively, and when a passage open signal is input, the open signal of the corresponding passage is '' level, and when the release signal for that passage is input, the output of the open signal is stopped. Reference numeral 101 denotes a light detection device including the above-described light emitter and light receiver 5A, 5B, 6A, and 6B, and 103 adds and subtracts signals from the light detection device to count people, forklifts, etc. in the passage. A counter 102 is a digital display section that displays the count value of the counter. Each open/release discrimination circuit 100a, 100b, 100
Passage signals D ₁ , D ₂ , D _N from _N , counter 103
The count signal Co and the drive signal Dr from the gate are input to an open/lock signal output circuit 105.

Here, the remote/manual switching circuit 104 and the open/manual switching circuit 104 are connected.
A specific example of the cancellation determination circuit _100N will be explained. Fifth
In the figure, the remote/manual switching circuit 104 includes a flip-flop circuit FF ₄ (hereinafter, the flip-flop circuits are abbreviated as "FF ₁ " and "FF ₂ ") and an OR circuit O ₂ (hereinafter, the OR circuit is referred to as "O ₁ "). When the receiving circuit ₃₇ receives a remote control signal, this signal is sent via _O2 to the set terminal of _FF4 . FF ₄ is set and a remote control signal is output from the Q terminal of FF ₄ , and when the receiving circuit 37 receives a manual control signal, this signal is
It is applied to the reset terminal of FF ₄ to reset FF ₄ , the remote control signal from the Q terminal of FF ₄ is stopped, and the manual control signal is output from the Q terminal. The open/release discrimination circuit _100N is an AND circuit _a5 , _a6 (hereinafter, AND circuits are referred to as " _a5 " and " _a6 ")
), O ₃ , FF ₅ , a ₅
The remote control signal from the Q terminal of FF ₄ and the 4th
The open signal from the control circuit corresponding to the Nth path among the set of open/release control circuits 108b in the figure and the count signal Co which becomes "H" when the count value of the counter 103 is "O" are _A6 corresponds to the remote control signal from the Q terminal of FF ₄ and the Nth path of the set of open/release control circuits 108b in FIG. A release signal from the control circuit is input. The output of _a5 is connected to the set terminal of _FF5 , and the output of _a6
The output of is applied to the reset terminal of FF ₅ via _O3 , and FF ₅ outputs an open signal D _N from its Q terminal when in the set state. The initial reset signal from the initial reset circuit Ir is transmitted to each open/release discrimination circuit 100a, 100 of the pair.
b, 100 _N is added to reset the flip-flop circuit of each circuit to a constant state when the power is turned on. Further, the remote control signal of the Q terminal of FF ₄ and the count signal Co are also applied to each open/release discrimination circuit 100a, 100b, _100N .

FIG. 6 shows a specific example of the open/lock signal output circuit 105. In Fig. 6, the drive signal Dr output while the shelf is moving is transmitted through the inverter IN ₁ .
a ₁ , a ₂ , a ₃ , a _N , and the counter 10
The count signal Co from 3 is added to a ₁ and said
The output signal H of the terminal of FF ₄ (see Figure 5) is applied to the NOR circuit no, and the open command signals D ₁ , D ₂ , D _N corresponding to each path are a ₂ , a ₃ , a _{N ,} respectively. They can be added to each separately, and can also be added all at once to the NOR circuit no. The outputs of a ₂ , a ₃ , and a _N are input to the set terminals of FF ₁ , FF ₂ , and FF _N via differentiating circuits DIF ₂ , DIF ₃ , and DIF ₄ , respectively, and FF ₁ , FF The output signals of terminals Q of ₂ and FF _N are transmitted to relays L 1 , FF N via integrator circuits INT ₁ , INT ₂ , INT ₃ and inverters IN ₂ , IN ₃ , and IN ₄ , respectively _.
It is designed to be added to L ₂ and L _N. Each relay L ₁ , L ₂ , L _N has a relay contact R ₁ , R ₂ , R
_N , and when each relay is energized and each contact is turned on, it is output as a first path signal, a second path signal, and an Nth path signal, and these path signals are The open signal corresponding to each passage is input to the circuit board of each shelf via output circuits 107a, 107b, and _107N in the figure. _The outputs _{of a1 and} NOR _{circuit no} in FIG _.
It is adapted to be added to relay L via IN ₅ . Relay L has a break contact Lo, which is turned off when relay L is energized and outputs a lock signal via output circuit 106 in FIG. As described above, this lock signal is applied to each circuit board 22 via the main circuit board 22a.

Next, the operation of the above embodiment will be explained. When both transmitters a and b select manual operation, as explained in Fig. 5, FF ₄ is reset by the manual operation signal and the output of the Q terminal becomes "L", so it can be opened or released. The gates of a ₅ and a ₆ in the discrimination circuit _100N and gate circuits similar to the above a ₅ and a ₆ in other open/release discrimination circuits that are paired with the above open/release discrimination circuit _100N remain closed. Yes, even if an open signal or a release signal is input by operating the transmitters a and b, the open signal will not be output from the open/release discrimination circuit _100N and other open/release discrimination circuits that are paired with it. This open signal is never released. Therefore, in this state, the passage forming operation can be performed by direct manual operation.

When at least one of the transmitting devices a and b selects remote control, FF ₄ in FIG. _N a ₅ ,
a ₆ and other corresponding open/release determination circuit 1
It is added to the gate circuits 00a, 100b, . . . In this state, if a person or forklift etc. enters the path that has been formed, the third
As explained in the figure, the light emission, the light receiver 5A, 5
Based on the operations of B, 6A, and 6B, the counter 103 in FIG. 4 counts the number of people in the passage or the number of forklifts, etc., and displays this on the display unit 102, and sets the count signal Co to "H". Input to _a1 in the open/lock signal output circuit 105. Here, assuming that all the movable shelves are stopped, the drive signal Dr is "L", and is inverted to "H" by the inverter _IN2 , and the above-mentioned _a1 , _a2 , _a3 , a _N is input. Therefore, the output of _a1 is "H", and this "H" signal passes through _O1 and is inverted to "L" by inverter _IN5 , which creates a potential difference between both ends of relay L, and the relay L is excited, its contact is turned off, and a lock signal is output. The movable shelf cannot move while the lock signal is being output.

When the number of people or forklifts in the passage becomes zero, the count signal Co of the counter 103 becomes "L", so the relay L in FIG. 6 is demagnetized and the output of the lock signal is stopped. Therefore, in order to form a passage at a desired position, transmitting devices a,
When one of b is operated, this signal is received by one of the receiving circuits 37a and 37b corresponding to the transmitting device, and the open/release discriminating circuit 108 forming the pair is received.
A desired passage open signal is outputted by the open/release discriminating circuits 100a, _100b , . To explain this more specifically, suppose that one of the transmitting devices a and b is operated to form the first passage, and the first passage opening signal D ₁ is output. The signal is input to the open/lock signal output circuit 105. This open signal D ₁ is added to a ₂ in FIG. At this time, the drive signal Dr is "L" and is inverted to "H" by inverter IN ₂ and becomes the other input of a ₂ , so the output of a ₂ becomes "H" and FF ₁ is set. , the output of the Q terminal of FF ₁ becomes "H", one terminal of relay L ₁ becomes "L" via integrating circuit INT ₁ and inverter IN ₂ , relay L ₁ is energized and its contact R ₁ is turned on. become.
Turning on this contact point _R1 is equivalent to selecting the first passage by direct manual operation, and thus the first passage forming operation is performed.

While the path forming operation is being performed in this way, the drive signal Dr becomes "H", so this is inverted to "L" by the inverter IN ₂ and is added to a ₂ , a ₃ , a _N , so that the new drive signal Dr becomes "H". Even if the path selection operation is performed by transmitting devices a and b to form a path at a ₂ ,
a ₃ ,……a _N keeps the gate closed,
FF ₁ , FF ₂ , ...... FF _N maintain the current state and maintain the output of the opening operation command signal for the first passage, so
The operation of forming the first passage continues. When the operation of forming the first passage is completed, the drive signal
Dr becomes "L", and a ₂ , _{a 3} , . Furthermore, when the drive signal Dr becomes "L", it is inverted to "H" by the inverter IN ₁ and a ₁
Also, when there are no people or forklifts in the passage, the count signal Co becomes "H" and this is added to the other input of _{a1 .} The output becomes "H",
This is O ₁ , and each _{FF 1 ,} FF ₂ ,
. . . It is input as the FF _N reset signal, and only then is a state in which a new path forming operation can be performed.

Note that remote control is selected by operating the transmitters a and b, and the passage signals D ₁ , D ₂ , . . .
...When all D _N are not output, the 6th
In the figure, all the inputs of the NOR circuit no are "L", and therefore the output of the NOR circuit no is "H", so this "H" signal passes through _O1 to the inverter _IN5.
It is reversed to "L" and applied to one end of relay L, and relay L is energized, its contact Lo is turned off, a lock signal is output, and each movable shelf is restrained from being able to move due to the circuit. That will happen.

(Effects) According to the present invention, while the shelf is being moved by the open signal input in the remote control mode,
Even if a new open signal is input, the input of the open signal will be ignored, and the newly input open signal will become effective only after one passage forming operation is completed and the movable shelf stops. Since the forming operation is performed, even if a new opening signal is input during the passage forming operation, the operation of all movable shelves will stop, or the opening command signal issued later will be interrupted. Since the passage forming operation is not performed based on this command signal as a priority, there is no need to confuse the desired passage forming operation or to redo the desired passage forming operation, resulting in an efficient operation. A mobile shelf device can be provided. Furthermore, even if a new opening command signal is input during the passage forming operation, the passage forming operation is not performed based on this command signal, which means that the original passage forming operation will not be changed unexpectedly. This eliminates the possibility of the movable shelf being caught between the shelves due to an unexpected movement of the movable shelf, making it possible to provide a highly safe movable shelf.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the external appearance of the device of the present invention, Fig. 2 is an external front view showing an example of a transmitting device used in the device of the present invention, and Fig. 3 is an example of an electric circuit used in the device of the present invention. 4 is a block diagram showing the signal discrimination circuit part in the above electric circuit in more detail, and FIG. 5 is a concrete configuration of the remote/manual switching circuit and the open/release discrimination circuit in the above discrimination circuit. FIG. 6 is a circuit diagram showing a specific example of an open/lock signal output circuit in the open/release discriminating circuit as above. a, b... Transmission device, 23... Discrimination circuit, 25
...Aisle selection switch, 27, 28...Remote control/manual direct operation changeover switch, 36...
Signal discrimination circuit, 37... Receiving circuit, 100a, 1
00b, 100 _N ...Open/release discrimination circuit, 104
...Remote/manual switching circuit (gate circuit), 105
...Open/lock signal output circuit (open signal output section).

Claims (1)

[Claims] 1. In a movable shelving device in which a plurality of shelves are movably arranged by a drive motor and a working path can be formed between the shelves by inputting an open signal, there are two modes: remote control mode and manual direct control mode. a gate circuit that opens the gate only when the mode selector switch is switched to remote control mode and allows a remotely input open operation command signal to pass through; Open operation command signal,
It is introduced into the control circuit of the movable shelf on the condition that the movable shelf is stopped, and the above-mentioned opening operation command signal is maintained until the passage forming operation based on the above-mentioned opening operation command signal is completed, and while the movable shelf is in operation, the above-mentioned gate is A movable shelf device comprising an open signal output section that blocks passage of a new open operation command signal input through a circuit.