JPS5915938Y2 - Electric mobile shelf control device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a control device for an electric movable shelf.

In order to effectively utilize the limited space inside a library or other room, multiple shelves are arranged on rails laid on the floor so that they can move freely using electric power, and items can be placed between the desired shelves as needed. Electrically operated movable shelves with passages for loading and unloading are already known.

In such conventional electric movable shelves, by issuing a command to create a passage between desired shelves, the position of each column at that time is detected, and the movement and direction of each column is electrically controlled. It is designed to be controlled.

Foreign object detection means, including means for detecting a worker entering the aisle between shelves, are installed at appropriate locations on the frontage of each column, and when this detection means is activated, the There are also known devices in which the movement of the shelves is stopped.

However, in such a conventional electric movable shelf equipped with a foreign object detection means, the movement of the movable shelf is simply stopped by the detection operation of the foreign object detection means. If the mobile shelf stops due to
The worker remained trapped between the transoms, and the foreign object detection means provided for the purpose of ensuring worker safety had little effectiveness.

The purpose of this invention is to immediately move the moving shelf a certain distance in the opposite direction when the foreign object detection means installed on the frontage of the electric movable shelf is detected, thereby closing the narrowing passage between the shelves. The purpose is to ensure the safety of workers in the aisle by spreading the shelves out a little, and to make it easier to remove foreign objects that are not caught between the shelves by the workers.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

In Figures 1 to 3, an appropriate number of rails 11, for example four, are laid in parallel on the floor of the room.
Above 1, there are 3 units of movable shelves 1 and 2 with 5 openings.
．． 3 is mounted so as to be freely movable in a direction perpendicular to the frontage of each column using wheels (not shown) mounted on the bottom and a motor (not shown) as a power source.

A shelf O is fixed at the end of the rail 11 on the side of the movable shelf 1.

On the top plate of each column 0, 1.2.3 are electric lights OFL, I FL, 2 that are to illuminate the passage formed between the adjacent shelves.
FL, 3 FL is supported by appropriate arms.

A seesaw switch OC8 is provided on one side of shelf 0 for instructing that a passage should be formed between shelves 0 and 1, and similarly, on one side of each column 1, 2.3, a seesaw switch OC8 is provided. , shelf 1
Suit-switches IC8, 2C5, and 3C8 are provided for instructing that passages be formed between shelves 2 and 3, between shelves 2 and 3, and between shelves 3 and a wall (not shown).

Each of these switches OC5, IC3, 2C3, and 3C8 is a so-called illuminated switch, and as described later, when the switch is closed, the light bulbs OP, IP, 2P, and 3P light up to illuminate the respective operation buttons. (See Figure 6).

Moreover, push button switches OPB, IPB, and 3PB for emergency stop of the movable shelf are provided beside these switches in each column.

It is assumed that the movable shelves 1, 2.3 each incorporate drive motors M1, M2 and M3, which will be described later.

Each of the movable shelves 1, 2.3 has an appropriate number of shelves for placing articles on both the front and back sides, and an example of shelf 1 is shown in FIG. 3 on the rain opening surface of each of these movable shelves. An appropriate number of foreign object detection switches 11 LS, 12 LS, .
LS is provided.

Similarly, the foreign object detection switches 21LS to 2nLS, 31LS to 3nLS are installed on the rain front surfaces of the other shelves 2 and 3.
(See Figure 6).

Each of these foreign object detection switches is linked to a detection plate that is pressable in the depth direction of the shelf and supported in the horizontal direction.

It is assumed that most of the control electrical equipment, which will be described later, is housed in a proper location of the stationary shelf O, for example, within the double-walled side wall. , 13° 14 are arms 15, 16, 17, 18 supported swingably in a horizontal plane on the top plate of each column.
, 19.20.

Next, examples of current circuits used in the present invention will be explained with reference to FIGS. 4 to 7.

In FIG. 4, the AC commercial power supply 21 is connected to the main switch 32.
It is led in by the electric line R2S via.

A series branch circuit consisting of a fuse 22 and a primary winding of a step-down transformer 23 is connected to the electric circuits R and S.

The secondary winding of the transformer 23 is connected to the input terminal of a rectifier circuit 24, and the output terminal of the rectifier circuit 24 is connected to electric lines B- and B+ via a smoothing circuit consisting of a parallel connection of a capacitor C and a resistor R1.
This electric circuit B-, B+ provides a low voltage (
For example, a DC voltage of 24 cm) is extracted.

The electric path R is connected to the common terminal of the movable shelf 1 drive motor M1 via the fuse 25 and the normally open contact IMI of the relay IM (see FIG. 6), and the normal rotation terminal of the motor M1 is connected to the relay IR ( The connection point between relay contacts 1M2 and 1R2 is connected to the motor through the normally open contact IR of the relay 1R. A capacitor C1 is connected to the reverse rotation terminal of the motor M1, and between the normal rotation terminal and the reverse rotation terminal of the motor M1.

Similarly, the electric circuit R is connected to the common terminal of the movable shelf 2 driving motor M2 via the fuse 26 and the contact 2M of the relay 2M, and the normal rotation terminal of the motor M2 is connected to the common terminal of the motor M2 for driving the movable shelf 2 through the contact 2R2 of the relay 2R and the contact 2M of the relay 2M. It is connected to the electric circuit S through the contact 2M2, and the connection point between the relay contacts 2M2 and 2R2 is the relay 2.
It is connected to the reverse rotation terminal of the motor M2 via the contact 2R of R, and furthermore, a capacitor C2 is connected between the normal rotation terminal and the reverse rotation terminal of the motor M2.

In addition, a fuse 27 and a relay 3 are connected between electric circuits R and S.
M contact 3M,, 3M2, relay 3R contact 3 R1,
A circuit consisting of 3R2 and capacitor C3 is connected as in the above case.

From these electric lines R and S to the motor M1. The circuit leading to M2 and M3 is referred to as a motor drive circuit 80.

A main power indicator light WL is connected between the electric circuits R and S as shown in FIG. Branch, series branch between normally open contact 1A4 of relay 1A and illumination light IFL, series branch between normally open contact 2A4 of relay 2A and illumination light 2FL, normally open contact 3A4 of relay 3A and illumination light 3F
The series branches with L are respectively connected.

Further, the electric line R is connected to one contact of each normally open contact I M3.2 M3.3 M of each of the relays 1M, 2 M, and 3 M, and the electric line S is connected to the above contact I through the chime CH.
M3.2 M3.3 Connected to each other contact of M3.

The circuit portion shown in FIG. 5 is referred to as a lighting/warning circuit 100.

A timer TA is connected between the electric lines B- and B+ as shown in FIG.

The timer TA has a contact TA1 that is closed in a normal state, that is, when not energized, and that opens after remaining closed for a relatively short period of time after energization.

A series branch line consisting of the contact TA1 of the timer, the normally open contact OA2 of the relay OA, and the relay AX is connected between the electric lines B- and B+.

The contact TA1 of the above timer is the normally open contact A of the relay AX.
XI is connected in parallel, relay IA is connected to the above relay contact OA2,
Normally open contacts IA2, 2A2, and 3A2 of 2A and 3A are connected in parallel.

Backflow prevention diodes D1 and D2 are connected in parallel to the timer TA and the relay AX, respectively.

These timers, relays, and relay contacts constitute a power failure countermeasure circuit 30.

Further, between the electric circuits B- and B+, there is a series branch line between the seesaw switch OC5 and the relay OA, and a seesaw switch I.
Series branch between C8 and relay 1A, seesaw switch 2C
Series branch of 8 and relay 2A, seesaw switch 3C3
and relay 3A are connected in series with each other.

The above-mentioned light bulb OP and diode D3, which illuminate the seesaw switch OC3 from inside, are connected in parallel to the relay OA, and similarly, the light bulb 1P and the diode D are connected to the relay 1A.
4, a light bulb 2P and a diode D5 are connected in parallel to the relay 2A, and a light bulb 3P and a diode D6 are connected in parallel to the relay 3A.

A portion consisting of each of these relays and each seesaw switch constitutes a command circuit 40.

Circuit B+ connects to circuit B via normally closed contact AX2 of relay AX.
connected to a.

Between this electric circuit Ba and electric circuit B-, relays 3B and 2B are connected.
, IB each normally closed contact 3B3.2 B3. A series branch consisting of I B3, normally open contacts OAt of relay OA, and relay OB, normally open contacts 3A of relay 3A, and normally closed contacts 2B2, 1B2 . OB
A series branch consisting of 2 and 2 is connected.

A series branch consisting of normally open contact IA1 of relay 1A and relay 1B is connected between the connection point of relay contacts 1B3 and 2B3 and the connection point of relay contacts OB2 and 1B2, and the connection point of relay contacts 2B3 and 3B3 is connected. Between the point and the connection point of relay contacts 1B2 and 2B2, there is a normally open contact 2A of relay 2A,
A series branch consisting of and relay 2B is connected.

In addition, each relay OB, IB, 2B, 3B has a diode D7. Ds, D9. The DIOs are connected in parallel.

A portion consisting of each of these relays and each relay contact constitutes a selection circuit 50.

A series branch line consisting of a normally open contact DX1 of a relay DX and a timer TC is connected between the electric line B- and the electric line Ba.

The timer TC has contacts TC1 and Te3 that are closed for a certain period of time when energized, and a series branch line consisting of the timer contact TC1 and another timer TD is connected between the electric lines B and Ba, and the relay contact DX1 is connected to the relay contact DX1. is the auxiliary push button switch AUPB, and the timer TC is the diode D1□
However, timer TD has relay CX and diode D1□,
D13 are connected in parallel.

The timer TD has a contact TD1 that is normally open and a contact TD2 that is normally closed, and each of these contacts is closed or opened for a relatively short period of time, for example, 1 second, when the timer TD is energized. It has become.

Electric line B-. Furthermore, between Ba, normally open contact OA3 of relay OA, timer contact TC2, and contact TB of timer TB are connected.
1, timer contact TD2, and normally closed contact EX1 of relay EX.
A series branch consisting of relay BX and relay BX is connected, and a normally open contact DX4 of relay contact OA3 and relay DX is connected to relay D.
A series branch consisting of X is connected.

The normally open contacts I A3.2 A3.3 A3 of relays IA, 2A, and 3A are connected in parallel to the relay contact OA, the normally closed contact DX3 of the relay DX is connected in parallel to the timer contact TC2, and the timer contact TB1 is connected in parallel to the normally open contact DX3 of the relay DX. A series branch line consisting of an auxiliary pushbutton switch AUPB2 and a timer contact TD1 is connected between the connection point of and Te3 and the connection point of the relay contact EX1 and timer contact TD2, and the relay contact DX4 is connected to each mobile shelf 1, 2.3.
Foreign object detection switches 11LS to 1 nLS, 2
1 LS to 2 nLS and 31 LS to 3 nLS are connected in parallel, respectively.

In addition, a diode D14 is connected to the relay BX, and a diode D14 is connected to the relay DX.
An indicator light LO and a diode D15 are each connected in parallel.

Note that the auxiliary pushbutton switches AUPB and AUPB2 are interlocked.

Each relay contact OA3, 1A3, etc. and each foreign object detection switch 1
A series branch consisting of the normally closed contact DX2 of the relay DX and the timer TB is connected between the connection point with the 1LS to 1 nLS etc. and the electric line B-, and a diode D16 is connected in parallel to the timer TB. ing.

The timer TB has the contact TB1 that opens after a certain period of time, for example, 20 seconds, after energization.

A portion including each of these timers, a foreign object detection switch, etc. constitutes a foreign object detection control circuit 60.

In addition, relay contact OA3. IA3 etc. and switch 11LS
A series branch circuit consisting of a relay EX and its normally open contact EX2 is connected between the connection point with the circuit B-, etc., and a series branch circuit consisting of a relay EX and its normally open contact EX2 is connected to the relay contact EX2.
PB, 3PB (see FIG. 1) are connected in parallel, and a diode D17 is connected in parallel to the relay EX.

A portion including these push button switches constitutes an emergency stop circuit 90.

After the electric circuit Ba passes through the normally open contact BX1 of the relay BX,
Each normally open contact O of relay OB, I B, 2 B, 3 B
B, , I B, , 2 B, , 3 B, respectively.

. B,,B2. It is branched into B3.

Electric line B. and B-, the diode D24, the normally closed contact 1L1 of the relay 1L, the diode D25, and the relay 1M
A series branch consisting of a normally closed contact 2L2 of diode D31 and relay 2L, a series branch consisting of diode D33 and relay 2M, a normally closed contact 3L3 of diode D38 and relay 3L, and a normally closed contact 3L3 of diode D4 and relay 3M. The series branches consisting of are connected respectively.

Diode D28 and relay O are connected between electric circuits B1 and B-.
A series branch consisting of normally closed contact OL1 of L, normally closed contact CX2 of relay CX, and relay 1R, diode D3□, normally closed contact 3L2 of relay 3L, diode D34, and relay C
A series branch consisting of normally open contact CX3 of X and relay 2R is connected.

Diode D36 and relay O are connected between electric circuits B2 and B-.
A series branch consisting of normally closed contact OL2 of L, normally closed contact CX4 of relay CX, and relay 2R is connected.

Furthermore, between the electric circuits B3 and B-, there is a diode D45, a normally closed contact OL3 of the relay OL, and a normally closed contact C of the relay CX.
A series branch consisting of X6 and relay 3R is connected.

Normally closed contacts 2L, 3L of relays 2L and 3L are connected in parallel to the relay contact ILt, and the connection point between each of these contacts and the diode D26 is the diode 26.
is connected to the connection point between relay 1R and relay contact CX2 via normally open contact CX1 of relay CX.

A connection point between diode D25 and relay 1M is connected between relay contacts CX2 and OL via diode D27.

The connection point between diode D2g and relay contact OL1 is connected to electric circuit B2 via diode D29, and also to diode D
It is connected to electric line B3 via 3o.

The relay contact 3L2 is connected in parallel to the relay contact 2L2.

The connection point between diode D33 and relay 2M is diode D3. It is connected between relay contacts OL2 and CX4 via.

The normally closed contact 1L2 of the relay 1L is connected in parallel to the relay contact OL2, and the connection point between the relay contact 1L2 and OL2 is connected to the electric circuit B3 via a diode D3□.

A connection point between diode D38 and relay contact 3L3 is connected to electric line B1 via diode D39 and to electric line B2 via diode D40.

Relay contact 3L3 and diode D4□ are connected to relay 3R and relay contact CX6 via a series branch of diode D4□ and normally open contact CX5 of relay CX.

Relay contact OLa has normally closed contact 1 for each relay 1L and 2L.
L3 and 2L3 are connected in parallel.

In addition, each relay IM, IR, 2M, 2R, 3M,
3 R has diodes Ihs and D19, respectively.
, D20, D20. D22. D23 are connected in parallel.

Each of these relays, relay contacts and electrical circuit B.

, Bl, B2. The part including B3 is the motor control circuit 70
It consists of

Between the electric circuits B- and B+, as shown in FIG. 7, there are a series branch circuit of limit switch OLS and relay OL, a series branch circuit of limit switch ILS and relay 1L, and a series branch circuit of limit switch 2LS and relay 2L. A series branch of the branch, limit switch 3LS and relay 3L is connected.

The limit switch QLS is the movable shelf 1 shown in FIG.
The limit switch ILS closes when the mobile shelf 1 moves to the left and overlaps the stationary tank O, and the limit switch ILS closes when the movable shelf 1 moves to the rightward limit of movement.Similarly, the limit switches 2LS and 3LS closes when movable shelves 2 and 3 each move to the rightward movement limit.

Each of the above relays OL, IL, 2L, and 3L is equipped with a diode D46°D47. D4B and D49 are connected in parallel.

As each of the limit switches mentioned above, any type of switch such as a micro switch, a magnetically sensitive switch, a light sensitive switch, or the like can be used.

A circuit including these limit switches and relays constitutes a limit switch circuit 110.

Next, the operation of the embodiment of the present invention configured as described above will be explained.

Now, when the main switch 32 (see Fig. 4) is turned on, commercial AC power is applied between electric circuits R and 5, and the indicator light WL (see Fig. 4) is turned on.
(see FIG. 5) lights up, and a DC power supply of a predetermined voltage is applied between the electric lines B- and B+.

After a certain period of time has elapsed after energization, the timer TA is activated and the contact TA1 is opened.

If each movable shelf 1, 2.3 moves to the left in Fig. 1 and is stacked on top of the stationary tank 0, then only the limit switch QLS (see Fig. 7) is closed and the other limits are closed. Switches I LS, 2 IS, 3 LS are open.

Therefore, relay OL is energized and its contacts OL,, OL2
．． OL opens.

In this situation, for example, fixed tank 0 and mobile shelf 1
When attempting to form a passage for loading and unloading articles between the stationary tank 0 and the stationary tank 0, the seesaw switch OC3 in the stationary tank 0 is closed.

This energizes the relay OA, and the light bulb OP
lights up and illuminates the seesaw switch OC5 from inside.

By energizing relay OA, its contacts OA, OA2, . OA
3. OA4 closes.

Even if contact OA2 closes, since timer contact TA1 is already open as described above, relay AX is not energized and its contact AX2 remains closed.

Then, when the relay contact OA is closed, the relay contact 3
B3.2 B3. I B3. OA 1. A current flows through the closed circuit made up of relay OB, and relay OB is energized to close its contact OB and open contact OB2.

By opening this contact OB2, the other relays IB, 2B, and 3B in the selection circuit 50 do not operate.

When the relay contact OA3 closes, the same contact OA3
, relay contact DX3, timer contact TB1゜TD2, relay contact EX□, and relay BX.
Relay BX is energized.

This closes the relay contact BX1, and as a result, the electrical circuit B
.

is connected to the electric line B+.

Therefore, electric path B. , the electric circuit B via diode D24, relay contact ILt, diode D25, and relay 1M.
- current flows through circuit B.

A current flows from the diode D3□, the relay contact 2L2, the diode D33, and the relay 2M to the electric path -, and also to the electric path B.

A current flows from the diode D38, the relay contact 3L3, the diode D4□, and the relay 3M to the circuit B-,
Relays IM, 2M, and 3M are energized, respectively.

When these relays are energized, each contact I Ml, I M
2. I M3.2 Mt, 2 M2.2 Ma, 3Ml
, 3M2.3M3 is closed, and motor Ml is connected from electric circuits R and S.
, M2, M3 (see Figure 4) are supplied with power, and each motor rotates in the normal direction to move the movable shelves 1, 2.3 to the first
It is moved to the right in the figure to create a passage between the stationary tank O and the movable shelf 1.

The illumination light QFL located on this passage is turned on when the relay contact 0A4 (see FIG. 5) is closed, and illuminates the passage for convenience of work.

When the movable shelf 1 starts traveling as described above, the limit switch OLS opens and excitation of the relay OL is cut off, and when the movable shelf 1, 2.3 travels to the limit of movement, the limit switches ILS, 2, LS, 3 are activated. LS closes, each relay I
L, 2L, and 3L (see FIG. 7) are excited.

Contact I is activated by energizing each relay I L, 2 L, and 3 L.
L,,I L2. I L3.2 L,,2 L2.2
L3.3L, , 3L2.3L3 opens, the excitation of each of the relays IM, 2M, and 3M is cut off, and the contacts of these relays return to their original states as shown in FIG. 4, and the movable shelves 1, 2
．． 3 stops running.

Even if the other seesaw switch IC5, 2C5 or 3C8 is closed and the relay IA, 2A or 3A is energized when the seesaw switch OC5 is closed, the selection circuit 50 selects the seesaw switch OC as described above.
Since circuits other than those related to 8 are cut, there will be no malfunction.

Next, when trying to form a passage between the fixed tank O and the movable shelf 1, for example between the movable shelves 1 and 2, from the state where the passage is formed between the fixed tank O and the movable shelf 1 as described above, After opening the seesaw switch OC8, the seesaw switch IC5 on the movable shelf 1 is closed.

This energizes relay 1A, closing its contacts 1A1, and energizing relay 1B, closing its contacts 1B2. I B3
opens.

Further, contact IA3 of relay 1A is closed, relay BX is energized, and its contact BX1 is closed.

Since the contact IBt is closed by the excitation of the relay 1B, the electric line B1 is connected to the electric line B+, and from this electric line B1, the diode D28, the relay contact OL1,
A current flows through CX2 and relay 1R, and is further shunted to diode D2□ to flow to relay IM, thereby exciting relays 1R and 1M.

The excitation circuits of other relays 2M, 2R, and 3M are connected to the electric circuit B1, but as mentioned above, the limit switch I L
Since relay contacts 2 L2.3 L2.3 L3 are open as a result of S, 2 LS, and 3 LS being closed, relays 2M, 2R, and 3M are not energized.

When relay 1R is energized, its contact IRt closes, and 1R
2 opens, and when relay 1M is energized, its contact 1
Since M, , 1M2 are closed, the reversing circuit of the motor M1 is closed, causing the movable shelf 1 to travel in the opposite direction, that is, to the left in FIG. 1, thereby forming a passage between the shelves 1 and 2.

When the shelf 1 travels in this manner, the limit switch ILS returns to its original state, and when the shelf 1 travels to its travel limit, the limit switch OLS closes, energizing the relay OL and energizing its contacts OL, OL2, . Open OL3 and relay IM
, IR is de-energized and its contact IM,, IM2j R1
, I R2 is returned to its original state, the motor M1 is stopped, and the traveling of the movable shelf 1 is stopped.

When the relay IA is energized, its contact 1A4 is closed, and the illumination lamp IFL is turned on to illuminate the passage.

In addition, while any mobile shelf is running, relays IM, 2M,
Since any one of the 3Ms is energized, the chime CH in the lighting/warning circuit 100 issues an alarm.

By the way, moving the movable shelves to create passages between predetermined shelves gradually narrows the width of the existing passages, so there may be workers or other foreign objects in the passages that are being narrowed. If there is, it is necessary to stop the movement of the shelves to ensure the safety of workers and remove foreign objects.

Therefore, in that case, the push button switch O provided in each column
Press one of PB, I PB, 2 PB, and 3 PB.

While the movable shelf is running, relay contact OA3. I A3.2 A
3.3 Since one of A3 is in the closed state, by pressing the push button switch, the relay EX is energized and self-held by its contact EX2.

Then, since the contact EX1 is opened by the excitation of the relay EX, the excitation of the relay BX is cut off and the contact BX1 is opened, and the motor control circuit 70 and motor drive circuit 80 connected after this contact return to their original states. The motor will stop and the movement of the shelves will also stop on the spot.

In order to return this emergency stop circuit 90 to its original state, after releasing the pressure on the stop button switch, first press the seesaw switch OC3.
The switches 3C8 to 3C8 that are in the closed state are opened, and all contacts OA3 to 3A3 are opened to release the self-holding state of the relay EX.

In order to restart the movement of the movable shelf, the user must close the seesaw switch again by operating the seesaw switch.

Furthermore, if the movable shelf is run without knowing that there is a worker or other foreign object in the passage between the shelves, the foreign object detection switches IILS to 1 nLS installed on the frontage of the moving movable shelf, 21 LS to 2nLS, 3
11Ls to 3nLSc7) Among them, the seesaw touches a worker or a foreign object in the passage and is closed.

While the shelf is running, relay contacts OA3, 1A3, 2A3, 3A
3 is in the closed state, relay D is connected via this closed relay contact and the foreign object detection switch.
X is energized, and its contacts DX1. Close DX4 and contact D
X2. Open DX3.

When relay contact DX4 closes, relay DX is self-held.

Further, when the relay contact DX1 is closed, the timer TC is energized and the timer contacts TC and TC2 are closed for a certain period of time.

This energizes another timer TD, and its contact T
D2 is opened for about 1 second, during which time the excitation circuit of relay BX is opened and its relay contact BX1 is opened, so that the power to the motor control circuit 70 and furthermore the motor drive circuit 80 is cut off, and the movement of the shelf is temporarily stopped.

After the shelf movement stops for about one second, contact TD2 of timer TD returns to its original state, so one of relay contacts OA3 to 3A3, timer contact TC2, timer contact TB1, timer contact TD2, and relay contact EX
1, BX is excited and closes its contact BX1.

Furthermore, when timer contact TC□ closes, relay C
X is energized and its respective normally open contacts CX1°CX3. Close CX5 and normally closed contact CX2. CX4. Open CX6.

Such an operation may occur, for example, as described above in the relay IM,
2M and 3M are energized and shelves 1 and 2.3 are traveling to the right in FIG. is once 1
After stopping for about a second, contacts CX1°CX3. Relays IR, 2R, 3R are energized via CX5, and their contacts IR1 and 1R2, 2R1 and 2R2, 3R1 and 3R2 are switched, and motors Mt, M2. Since the drive circuit of M3 switches to the reverse drive circuit, the movable shelf starts traveling in the opposite direction, widening the passage that was being narrowed again.

Such traveling in the opposite direction is performed by a preset timer T.
Lasts for the operating time of C.

The operating time of this timer TC is, for example, 10 c.
Let it be the amount required to go backwards by about m.

When the timer TC stops operating after a certain period of time has elapsed, its contacts TCX and TC2 open, the excitation BX1 of the relay BX opens, and the shelf stops moving backwards.

By reversing the shelves in this manner, the width of the passage is widened, so that workers who might have been caught between the shelves can escape from the passage, and foreign objects can also be removed.

Note that during the foreign object detection operation, the relay DX is energized and the indicator light LO lights up, so that it can be known from the indicator light LO that the foreign object detection operation is in progress.

By the way, depending on the object caught between the shelves or the situation, it may not be possible to reset the foreign object detection switches 11LS to 1nLS etc. even if the shelves are moved backwards a certain distance, and if about 20 seconds pass, the timer TB contact TB1 opens, and then in an attempt to move the shelf, one operates the seesaw switch on one of the shelves and the relay switch OA3. I A3.2 A3, 3 Even if one of A3 is closed, relay BX is not energized, and its contact BX
1 cannot be closed, it becomes impossible for the shelves to move, and it may become impossible for a worker caught between the shelves to escape or to remove a foreign object.

In such a case, the embodiment of the present invention presses the auxiliary pushbutton switches AUPB1 and AUPB2.

When the auxiliary push button switch AUPB1 is closed, the timer TC is energized, the contacts TC1 and TC2 are closed for a certain period of time as described above, and the timer TD and the relay CX are energized.

Then, one of seesaw switches OA3 to 3Aa, timer contact TC2, and auxiliary push button switch AUP
The relay BX is energized via the timer contact B2, the timer contact TD1, and the relay contact EX1, and the relay BX is energized and the relay contact BX1 is closed, thereby closing the electric path to the motor control circuit 70.

Excitation of the above-mentioned Lu-CX means switching the circuit in the direction of moving the movable shelf backwards as described above, so here the movable shelf moves backwards in the direction of widening the passage, travels to the limit of movement, and switches the limit switch. Activation of the circuit 110 causes the shelf to stop running as described above.

In this way, the passageway that was being narrowed can be widened to the maximum extent again, making it easier for workers to escape and removing foreign objects that were in the passageway between the shelves, and each timer, relay, etc. to be restored to its original state. Therefore, a passage can be formed again between the desired shelves.

Since the auxiliary pushbutton switch AUPB1 is provided in parallel with the contact DX1 of the relay DX constituting the foreign object detection means, the timer TC can be activated by pressing the auxiliary pushbutton switch arbitrarily before the foreign object detection means performs the foreign object detection operation. Then, the reversal timer CX is excited for a certain period of time and the shelf runs in the opposite direction.

Therefore. Even if the foreign object detection operation is not performed, the shelf can be arbitrarily moved in the opposite direction to ensure safety in advance.

In addition, limit switches OLS and I linked to each movable shelf are
LS, 2 LS, 3 LS or malfunction of other electrical components, the drive motors Mi, M2. All or one of the M3s may be energized continuously, and the drive motor may overheat and burn out.

However, according to the illustrated embodiment, while the drive motor of any of the movable shelves is energized, the seesaw switch OA
3. I A3.2 A3.3 Since the timer TB is energized via one of A3 and the relay contact DX2, the timer contact TB1 is 20
After about a second has elapsed, it opens to cut off the excitation of relay BX.

Therefore, the nomit switch OLS, I LS, 2 LS
, 3 When the LS operates normally, the movement is completed within the above 20 seconds and the power is cut off, but due to a malfunction of the limit switch, etc., the drive motor is still energized even after the shelf movement is completed. Even if 20 seconds have elapsed, the contact TB1 of the timer TB opens to cut off the excitation of the relay BX, and the contact BX1 opens to cut off the power to the drive motor.

This way the motor is protected.

By the way, if the power goes out for some reason while the shelf is running, the shelf will stop midway.

When the power is restored in this state, the shelves will start running again unless special equipment is added.

However, if a worker enters the narrowing aisle during a power outage, and the power is restored in that state, there is a risk that the worker in the aisle will become trapped between the shelves.

In the embodiment of the present invention, in order to eliminate such danger,
A power outage countermeasure circuit 30 is provided.

That is, for example, if a power outage occurs when the seesaw switch OC3 is closed to form a passage between the shelves O and 1, and then the power is restored, the timer TA is energized and its contact TA1 is turned on. Contact TA1 continues to remain closed, and after a certain relatively short period of time has passed, contact TA1
opens.

Therefore, while the contact TA1 is open, the contact TA1
When the seesaw switch is closed, the relay AX is energized via the relay contact OA2, and the relay AX is self-held by closing the contact AX.

Since the other contact AX2 opens due to the excitation of the relay AX, the other circuits connected after this contact AX2 do not operate, and the motor M15M29M3 and therefore the shelves 1, 2, 3
It never moves either.

In this way, even if the power outage is restored, the shelves will not run recklessly, so the above-mentioned dangers can be prevented.

After the power outage is restored, when you want to run the shelf again, you should temporarily close the seesaw switch OC8, which is still closed, and reset the relay contact OA2 to cut off the excitation of the relay AX, and switch the relay contacts AX1. Return AX2 to its original state.

Then close the desired seesaw switch.

At this time, one of the relay contacts OA2 to 3A2 closes, but the timer contact TA1 is already open, and
Although relay contact AX1 is open, relay AX is not energized.

Therefore, with the seesaw switch closed, normal driving operation can be performed.

As explained above, according to the device of the present invention, when the foreign object detection means is activated, the shelves being moved are moved in the opposite direction to widen the passage between the shelves, which was becoming narrower. The safety of the workers in the passage is ensured, and the removal of foreign objects in the passage becomes easy.

Furthermore, if the worker in the aisle cannot escape or the foreign object cannot be removed even after the shelf moves backward a certain distance due to the foreign object detection operation, a dangerous situation may be expected before the foreign object detection operation is performed. In this case, the shelf can be moved backwards by manual operation, making it even safer.

In the illustrated embodiment, there are three units of movable shelves, but the present invention is not limited to this, and the number of movable shelves can be increased or decreased in any manner.

In that case, the electrical components included in each column may be increased or decreased according to the same connection pattern as the electrical component connection pattern in the illustrated embodiment.

Moreover, all the shelves may be movable shelves.

The seesaw switches in the command circuit may be provided centrally on the fixed shelf.

Furthermore, semiconductor circuit elements may be used instead of relays.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an arrangement example of an electric movable shelf having the device of the present invention, Fig. 2 is a plan view of the same as above, Fig. 3 is a front view showing one of the above movable shelves, and Fig. 4 is a diagram of the invention A circuit diagram showing an example of the part including the motor drive circuit in the device, FIG. 5 is a circuit diagram showing an example of the lighting/warning circuit as above, and FIG. 6 is a part including the command circuit, foreign object detection control circuit, and motor control circuit as above. FIG. 7 is a circuit diagram showing an example of the same limit switch circuit as above. 0...Fixed shelf, 1,2.3...Moving shelf, 60...Foreign object detection control circuit, 70...
・Motor control circuit, 80...Motor drive circuit, 90...Emergency stop circuit, TA, TB, TC
.

Claims (1)

[Scope of utility model registration request] In electric movable shelves that are movably arranged on a rail by a drive motor, there is a command circuit that issues a command to form a passage between each shelf, and based on the command of this command circuit,
A motor control circuit that determines the movable shelf to be run and the direction in which it should be run, and a motor that supplies power so that a predetermined motor among the motors rotates in a predetermined direction based on the control of this control circuit. A drive circuit, a detection means that detects when a foreign object is present in the narrowing passage between the shelves, and the detection operation of the detection means causes the motor drive circuit to be controlled by the motor control circuit through the motor control circuit. The foreign object detection control circuit includes a switching means for switching the moving direction of the movable shelf to a direction opposite to the traveling direction determined by the circuit, and a timer for determining a switching operation time of the switching means, and this foreign object detection control circuit also includes: , a manual means for switching the traveling direction of the movable shelf is provided in parallel with the foreign object detection means, and the traveling direction is controlled by the detection operation of the foreign object detection control circuit and further by the switching operation of the manual switching means in the foreign object detection control circuit. A control device characterized in that a movable shelf therein is made to run in the opposite direction for a certain period of time.