JPH027645B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a movable shelf control device that controls the movement of a plurality of shelves so as to optionally form a working passage between each shelf. related to the invention, particularly those designed to improve safety.

[Technical background of the invention and its problems] As is well known, in shelving devices that store a large number of articles, files, etc., movable shelves as described above are often used to improve space efficiency. ing. Generally, such movable shelving devices are configured to manually drive each shelf to form a working path corresponding to the work surface of the desired shelf. When it becomes large or there are many shelves, it becomes difficult to move it manually.

For this reason, in the past, each shelf was equipped with a self-propelled mechanism.
Various movable shelf devices have been developed in which a desired working passage is automatically formed by operating a passage selection switch corresponding to the working passage to be formed. That is, in this type of movable shelf device, a motor and an aisle selection switch are installed on each of a plurality of shelves that are set to be movable along a specified rail, and the aisle selection switch provided on any shelf A is installed. By operating the
Each shelf is moved by the motor so that a working passage a corresponding to the shelf A is formed. After the working passage a corresponding to the shelf A is formed, an interlock is automatically applied so that the working passage a is maintained. This interlock state is maintained until the worker operates a reset switch installed on the shelf A, for example, when leaving the work passageway A.

By the way, in the actual work of taking out stored items from a movable shelf, if a working passage b corresponding to a desired shelf B happens to be formed, the passage selection switch of the shelf B must be operated without operating the passage selection switch. It is often the case that a worker enters the working passageway b and performs the work without applying an interlock to maintain the working passageway b. In this case, if another worker operates the passage selection switch of a shelf other than the shelf B, the problem arises that the shelf B will be moved.

Conventionally, safety measures have been taken in which a safety stop bar is installed on each shelf, and when this safety stop bar is pushed by the worker, the movement of each shelf is forcibly stopped. There is.

However, with such safety measures, the shelf is actually moved until the safety stop bar touches the worker, so it cannot be said that it is still sufficient in terms of safety.

Furthermore, when the worker operates the aisle selection switch of the desired shelf C to form the work passage c, that is, even if the interlock is applied to the work passage c, the worker If the reset switch is operated by mistake during ejecting, etc., the interlock will be canceled. Therefore, if the aisle selection switch of another shelf is operated, the problem arises that the shelf C that is being worked on is moved, and in this respect, it cannot be said that safety is sufficient. .

[Purpose of the Invention] This invention has been made in consideration of the above circumstances, and it is possible that if a worker enters the work passage without setting the interlock, or while working while setting the interlock. An object of the present invention is to provide an extremely good control device for a movable shelf that takes further safety measures.

[Summary of the Invention] In other words, the movable shelf control device according to the present invention includes a detector installed at the entrance/exit of each work passage corresponding to each of a plurality of shelves to detect when a worker passes through the entrance/exit. Even if the interlock is not applied when entering the work passage, the interlock will be automatically activated by the detection output of the detector, and the safety stop bar in the work passage will be automatically activated when exiting the work passage. By automatically resetting to release the interlock using the activation signal of the safety stop bar caused by pressing and the detection output of the detector, the operator can enter the working path without setting the interlock. This is to take even greater safety measures when the machine is in use, or when the interlock is engaged during work.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the overall state of the movable shelf device. In this case, for convenience, the first to third movable shelves 12a, 12b, and 12c are set to the fixed shelf 11 set at the left end. An example is shown. These movable shelves 12a to 12c are set to be moved by wheels on a common rail 13, and each movable shelf 12a to 12c is configured to be moved by wheels on a common rail 13.
Each of the wheels 12c is equipped with motors M1 to M3 that rotationally drive the wheels.
According to the rotation direction of M3, each movable shelf 12a~
12c is moved to the right or left.

In addition, the fixed shelf 11 and the movable shelves 12a to 12
Adjacent shelves are set close to each other, and limit switches LS0 to LS3 that are operated in contact with the stop mechanism 14 are provided on each of the shelves c. Furthermore, the fixed shelf 11 and the movable shelf 12a~
12c is provided with safety bar switches SB0 to SB3 operated by safety stop bars (not specifically shown) set for each work surface.

Here, the fixed shelf 11 and movable shelves 12a to 1
2c is provided with passage selection switches PB0 to PB3 that instruct the formation of a working passage for each work surface, and for each working passage formed by moving each movable shelf 12a to 12c. Illumination lights FL0 to FL3 such as fluorescent lamps are provided.

In addition, the fixed shelf 11 and the movable shelves 12a to 12
c, detectors OP0 to OP that detect when a worker passes through the entrance/exit of each work passage formed by operating each passage selection switch PB0 to PB3;
3 is provided. This detector OP0~OP3
detects when a worker has passed through a work passage without touching the worker using, for example, light, infrared rays, and sound waves.

In FIG. 1, CS is a main power switch, and LP is an indicator lamp for confirming that the main power is turned on. Further, although not particularly shown in the figure, the passage selection switches PB0 to PB3 are constituted by push button switches, and have built-in lamps L0 to L3, which will be described later, for displaying operation confirmation.

In other words, any passage selection switch PB0
~ When PB3 is pressed, the lamps L0 to L3 of the operated passage selection switches PB0 to PB3
is lit. Then, as will be described later, a working passage corresponding to the operated passage selection switch PB0 to PB3 is formed, and then an interlock is applied to each movable shelf 12a to 12c so that the working passage is maintained. It is something. This interlock state continues without being released until a reset operation, which will be described later, is performed.

Here, FIGS. 2 to 10 respectively show circuits for driving and controlling the above-mentioned movable shelf apparatus. First, FIG. 2 shows a power supply section and a control circuit for the motors M1 to M3. In other words, the power lines P1 and P2 are
It is taken out via NFB1 and NFB2,
Among these, the power lines P3 and P4 taken out via the safety device NFB2 are connected to the lighting lights FL0 to FL3.
Used as a power source for lighting.

In addition, the power taken out through the safety device NFB1 is voltage-adjusted by a transformer Tr, then rectified by a rectifier SRf, and used as a power source for each control relay circuit described later.
1 to M3 and lamps L0 to L3. Among these, motors M1 to M3 have contacts M1R, M1L, M2R, M2L, and M3, respectively.
The rotation direction is specified by R and M3L, and the rotation is controlled.

Next, FIG. 3 shows parts related to the safety stop bar and limit switch. That is, safety stop relays SB0X to SB3X are energized when the safety bar switches SB0 to SB3 are closed when the safety stop bar is not operated, and limit relays LS0X to LS3X are energized when the limit switches LS0 to LS3 are operated.

In addition, the operation of the safety bar general relay SBX, which operates when all the safety stop relays SB0X to SB3X are energized, that is, when all the safety stop bars are not activated, and the thermal switches TH1 to TH3, which detect overload conditions. Overload detection relay STP, which is energized at the same time, and general relay
Each is equipped with an MS.

Next, FIG. 4 shows a passage selection section that detects the operation of the push button type passage selection switches PB0 to PB3, and a display control section that displays the display lamps LP and lamps L0 to L3. , path selection auxiliary relays PB0X1 to PB3x1.

Fig. 5 shows an interlock command section, in which relays PB0X2 to PB3X2 are energized in relation to the operation of path selection switches PB0 to PB3.
It is equipped with

Furthermore, FIG. 6 shows the interlock circuit section and the parts related to the detectors OP0 to OP3, including the interlock relay IX, the operation detection relay PBX1 of the passage selection switches PB0 to PB3,
The relay SBXX is provided to check the operation of the PBX2 and the relays PB0X2 to PB3X2.

Further, T in the figure is a traveling limit timer, which limits the time from when the passage selection switches PB0 to PB3 are operated until the working passage is formed, that is, the movement time of each movable shelf 12a to 12c. . Furthermore, the top in the figure is a delay timer, which counts a certain amount of time after the detection output is generated from the detectors OP0 to OP3.

Next, FIG. 7 shows a motor control circuit that gives a clockwise or counterclockwise rotation command to the motors M1 to M3. That is, motor M1
~Clockwise rotation command relay M1R for each M3
~M3R and left rotation command relays M1L to M3L, and a motor operation confirmation relay MX that detects the motor rotation command state.

Further, FIG. 8 shows timers T1 to T3 for setting start command timing when sequentially driving the movable shelves 12a to 12c, and FIG.
The lighting control circuit for FL0 to L3 is shown. Furthermore, FIG. 10 shows the detectors OP to OP3.

The operation of the above configuration will be explained below. That is, when attempting to form a working passage between the movable shelves 12a and 12b in the state shown in FIG. 1, the passage selection switch PB1 for specifying this passage is operated. When the path selection switch PB1 is pressed, the safety bar switches SB0 to SB3 shown in FIG. 3 are not operated and are in the on state, and the safety stop relay SB
Since 0X to SB3X are in the operating state, contact SB0
X~SB3X is set to close and safety bar general relay
SBX is in operational state.

Also, at this time, the operation detection relay shown in FIG.
Since PBX1 operates, general relay MS is operated. Therefore, the lamp L1 shown in FIG. 4 when the path selection auxiliary relay PB1X1 is activated is lit, and the relay PB1X1 forms a self-holding circuit at its contacts.

Furthermore, when the passage selection switch PB1 is operated, there is a working passage on the right side of the movable shelf 12c in FIG.
Only limit switch LS3 is set to the open state. For this reason, limit relays LS0X to LS2X shown in FIG. 3 are set to an operating state, and limit relay LS3X is set to a non-operating state.

Therefore, in FIG. 7, when the path selection auxiliary relay contact PB1X1 closes, current is supplied to the clockwise rotation command relay M3R, causing the motor M3 shown in FIG. 2 to rotate clockwise.
That is, the movable shelf 12c starts moving rightward in FIG.

Furthermore, at this time, the clockwise rotation command relay M3
By the operation of R, the motor operation confirmation relay MX shown in FIG. 7 is operated, and a self-holding current is supplied to the self-holding circuit of the path selection auxiliary relay PB1X1 shown in FIG. PB1
The operating state of X1 is maintained.

In this way, when the motor M3 starts to rotate in the right direction, the timer T2 shown in FIG.
is started, and after a specific time delay after a starting command is given to motor M3, the contacts of this timer T2 are closed, and limit switch LS2 is opened.
motor 1 before limit relay LS2X operates.
Right rotation command relay M2R that moves M2 to the right
becomes operational.

That is, after the movable shelf 12c at the right end in FIG. 1 is moved, a start command is given to the next movable shelf 12b after the set time of the timer T2 has elapsed,
Movable shelves 12c, 12 with minute intervals set
b is now moved to the right with priority. This moving state is controlled by the limit switch.
This continues until LS3 and LS2 operate, and movable shelf 1
A working passage is formed between 2a and 12b.

In addition, when a working passage is formed as described above, the aforementioned passage selection auxiliary relay PB
1X1 is in the operating state, the limit switch LS1 for this formed working passage is opened,
Since limit relay LS1 is rendered inactive, relay PBX2 shown in FIG. 5 is rendered operational. Therefore, the illumination light FL1 corresponding to the work passage formed above is controlled to be turned on, and the detector OP1 shown in FIG. 10 is set to the operating state.

In such a working passage forming operation process,
When the operated path selection switch PB1 is released, the operation detection relay PBX1 shown in FIG. 6 is deactivated, and the interlock relay IX is activated and self-held at its contact point. When this interlock relay IX operates, the contact IX shown in Fig. 4 is opened, and even if a new passage selection switch is operated, the operation of each relay corresponding to this switch operation is prohibited, and the interlock relay IX is opened. It is set to a locked state.

Here, the above-mentioned interlock state is canceled by performing the following reset operation. That is, when the work passage is formed as described above, the operator operates the safety stop bar installed on the movable shelf 12a when exiting from the passage after completing the work. Then, first, the detector OP1 detects that the worker has exited the entrance/exit part of the work passage, that is, has passed through, and the contact OP1 shown in FIG. 6 is closed by the detection output.

On the other hand, when the operator operates the safety stop bar of the movable shelf 12a, the safety stop relay SB1X shown in FIG. 3 is deactivated, and thereby the safety bar general relay SBX is deactivated. For this reason,
Relay SBXX shown in Figure 6 becomes operational,
Its contact SBXX is closed.

Then, contact OP1 and contact SBXX shown in Figure 6
When both are closed, the delay timer Top is activated, and after a predetermined period of time has elapsed, the contact Top shown in FIG. 5 is brought into an open state. For this reason,
When relay PB1X2 is deactivated, interlock relay IX is also deactivated, and the interlock state is released.

Here, contact OP1 and contact SBXX shown in Fig.
The reason why we set a certain delay time between when both are closed and when the interlock is released is because, for example, when a worker exits an aisle while pushing a trolley, etc.
If you press the safety stop bar first and then try to exit,
This is to prevent the interlock from being canceled before the detectors CP0 to OP3 generate detection outputs at the tip of the trolley and the operator has not fully exited.

Next, the state shown in FIG. 1, that is, the movable shelf 12
a to 12c are all moved to the left side and a working passage is formed for the movable shelf 12c, without the operator operating the passage selection switch PB3 of the movable shelf 12c, that is, without applying an interlock. Assume that you enter the working passage. Then, the detector OP3 installed on the movable shelf 12c detects that the worker has passed, and the contact OP3 shown in FIG. 5 is closed.

At this time, since the safety stop bar is not operated, the safety bar general relay SBX is in the operating state, so the relay SBXX is in the non-operating state. Therefore, the contact SBXX shown in Figure 5 is in the on state, and the limit switch is also in the on state.
Since LS3 is in a non-operating state, contact LS3X shown in FIG. 5 is also in an on state. Therefore, relay PB3X2 shown in FIG. 5 is put into operation.

On the other hand, since the passage selection switches PB0 to PB3 are not operated, the operation detection relay PBX1 is in a non-operating state, and the contacts shown in FIG.
PBX1 is in the on state. For this reason, interlock relay IX shown in Figure 6 is activated,
This is where the interlock is applied.

Therefore, according to the configuration of the above embodiment, even if the worker enters the work passage without setting the interlock, the interlock can be automatically applied, and it is possible to prevent the worker from accidentally setting the interlock while taking out the work. Even if the safety stop bar is operated, the interlock state will not be released unless the user exits the work passage, so even further safety measures can be taken.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] Therefore, as detailed above, according to the present invention, if the worker enters the work passage without setting the interlock, or if the worker works while setting the interlock, It is possible to provide an extremely good control device for a movable shelf that takes even greater safety measures while the user is away.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of a control device for a movable shelf according to the present invention, and is a side view for explaining the configuration of the shelf portion, and Figs. 2 to 10 respectively control the shelf device of the same embodiment. FIG. 2 is a circuit configuration diagram showing a control circuit in a divided state. 11...Fixed shelves, 12a to 12c...Movable shelves,
13...Rail, 14...Stopping mechanism, M1 to M3
...Motor, LS0 to LS3...Limit switch, SB0 to SB3...Safety bar switch, PB0
~PB3...Aisle selection switch, FL0~FL3...
...Illumination light, OP0 to OP3...Detector, CS...Main power switch, LP...Indication lamp, L0 to L3
...Lamp, P1-P4 ...Power line, NFB
1,NFB2...safety device, Tr...transformer, SRf
... Rectifier, M1R, M1L ... Contact, M2R,
M2L...Contact, M3R, M3L...Contact, SB
0X~SB3X...Safety stop relay, LS0X~LS
3X...Limit relay, SBX...Safety bar general relay, TH1~TH3...Thermal switch,
STP...Overload detection relay, MS...General relay, PB0X1~PB3X1...Passage selection auxiliary relay, PB0X2~PB3X2...Relay,
IX...Interlock relay, PBX1, PBX2
...Operation detection relay, SBXX...Relay, T...
...Driving limit timer, Top...Delay timer,
M1R~M3R...Right rotation command relay, M1L~
M3L...Left rotation command relay, MX...Motor operation confirmation relay, T1-T3...Timer.

Claims (1)

[Claims] 1.Equipped with a plurality of shelves set to be movable along specified rails, the movement of the shelves is controlled by a motor set on each of these shelves, and a work space is placed between arbitrary shelves. A passage is selectively formed, and when the working passage is formed, an interlock is applied until a reset operation is performed, and if the shelf is moved while entering the working passage without the interlock applied. In this case, in a movable shelf control device configured to stop the shelf by means of a safety stop bar set corresponding to each of the working passages, an entrance/exit of each working passage corresponding to each of the plurality of shelves is provided. A detector is installed in the work passageway to detect when a worker has passed through the entrance/exit, and the interlock is automatically applied by the detection output of the detector even if the interlock is not applied when entering the work passage. Furthermore, when exiting the work passage, a reset for canceling the interlock is automatically performed based on the activation signal of the safety stop bar by pushing the safety stop bar in the work passage and the detection output of the detector. A control device for a movable shelf, characterized in that: