JPS5938905Y2 - Electric mobile shelf - Google Patents

Description

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

Conventional electric movable shelves have a foreign object detection device on the frontage surface of each column that detects workers, etc. in the aisle between the shelves, and when this detection device is activated, the movable shelf Some systems are designed to stop the movement of traffic lights to protect workers in the passageway.

However, in such conventional electric movable shelves equipped with foreign object detection devices, the operation of the foreign object detection device simply stops the movement of the movable shelves, so workers are often trapped between the shelves. If the movable shelves stop due to this, the worker remains trapped between the shelves, and the foreign object detection device provided for the purpose of ensuring worker safety has little effectiveness.

Therefore, when the foreign object detection device detects the foreign object, the applicant immediately moves the moving shelf a certain distance in the opposite direction, thereby widening the narrowing passage between the shelves to some extent. I filed an application for utility model registration for a control device designed to ensure safety (utility application filed in 1983-1986).
No. 791).

According to the control device related to the above-mentioned application, worker safety is significantly improved, but even with the above-mentioned device, safety may not be completely maintained, assuming all kinds of actions taken by workers. .

For example, suppose that while - worker A is working in a passage formed between transoms, another worker B operates to form a working passage between different shelves.

As a result, the distance between the transoms that B wants widens and a passage is formed, but the passage A is in narrows, so a part of A's body touches the foreign object detection device, which activates the detection and moves. The shelves inside move backward by a certain distance, and this time the space between the shelves that B wants narrows.

Therefore, if B gets in the transom that B wants, which is expanding, before the foreign object detection device detects A, the foreign object detection device detects A and the moving shelf starts moving backwards. , B may be caught between the shelves.

The object of the present invention is to detect when the shelf is moving backwards due to the detection operation of the foreign object detection device facing the aisle that is becoming narrower, and when the foreign object detection device facing the aisle that is narrowing due to the reverse movement is activated to detect the shelf. To provide an electric movable shelf designed to ensure the safety of all workers by immediately stopping a shelf moving backwards on the spot.

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

1 and 2, an appropriate number of rails 11 are laid in parallel on the floor of the room, and this rail 11 includes two
Unit movable shelves 1 and 2 are mounted on wheels mounted on the bottom and movable in a direction perpendicular to the frontage of each column using a motor as a power source.

A shelf 0 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, and 2 is an electric light OFL to illuminate the passage formed between the adjacent shelves.

IFL and 2FL are supported by appropriate arms.

On one side of each column 0, 1, and 2, there are push buttons for instructing that a passage should be formed between shelves 0 and 1, between shelves 1 and 2, and between shelf 2 and a shelf or wall not shown. switch OPB,
IPB, 2PB and emergency stop operation switch 08PB,
15PB and 2SPB are provided.

Further, on one side of the stationary shelf O, a power switch KS and an auxiliary unlocking switch APB are provided.

The movable shelves 1 and 2 are each driven by a drive motor M1, which will be described later.
It is assumed that 1M2 is built-in.

On the right side frontage of each movable shelf 1, 2 in Fig. 2,
Right-hand limit switch F that operates when each column moves to the rightward movement limit and collides with the adjacent shelf or wall.
On the frontage surface of the left side of each column 1゜2, LSI and FLS2 are equipped with a left-hand limit switch RLSI that operates when each column moves to the leftward movement limit and collides with the adjacent shelf.
, RLS2 are provided, respectively.

In addition, on the frontage surface of the left side of each movable shelf 1, 2, a foreign object detection or safety bar switch R35 is installed at an appropriate position between the low and middle positions.
I, R352 are provided, and a similar switch FSS2 is provided on the frontage surface on the right side of the movable shelf 2.

Next, the configuration of the electric circuit of such a shelf device will be explained.

In Figure 3, the commercial AC power supply receiving line R6, To
is connected to the indicator light IWL via the transformer T1, and to the electric lines R and T via the earth leakage breaker LB.

A normally open power switch KS and relay IM are installed between electrical circuits R and T.
The series branch with is connected.

In addition, the AC voltage between electric lines R and T is stepped down to an appropriate voltage by a transformer T2, then rectified by a rectifier, and then smoothed by a smoothing circuit consisting of a capacitor C and a variable resistor VR. It is designed to be applied to electrical circuits A and J via contacts IM and IM.

In Fig. 4, an indicator light 2WL and a timer ITM for power outage countermeasures are connected between electrical circuits A and J, and the a contact ITM of the timer ITM and a relay CX (see Fig. 5)
A series branch consisting of the a-contact CX and the relay 1X is connected to a series branch consisting of the a-contact OPB of the push button switch OPB and the open command indicator OPL.

A relay OAX is connected in parallel to the indicator light OPL.

Moreover, b of the auxiliary switch APB is connected between the electric circuit A and J.
A series branch consisting of a contact and an unlocking indicator APL, a series branch consisting of an a contact of the above switch APB, a b contact of relay CX, and an unlock command relay 6X, an a contact of relay OAX, a diode D1, and a relay 3X. (see Figure 5), the b contact of diode D2, the b contact of relay 2X, and the relay 7X (fifth
A series branch consisting of the b contact of the relay CX (see figure), the a contact of the relay CX, and the motor drive relay 2M are connected to each other.

An electric line A' is drawn out between the relay contact OAX and the diode D1, and the electric circuit A' is connected between the diode D1 and the relay contact 3X.
An electric circuit B is drawn out between the two.

The a contact of a timer 3TM (see Fig. 5) is connected between the electric circuit B and the connection point between the diode D2 and the relay contact 2X, and between the connection point between the diode D2 and the relay contact 2X, and between the relay contact CX and the relay contact 2M. Relay 6 is connected between the connection point of
The a-contact of X is connected, and a series branch consisting of a diode D3 and an operating time limit timer 2TM is connected between the connection point of the relay contact 3X and the diode D2 and the electric line J.

A series branch line consisting of the a contact of relay 2X and emergency stop relay 2X is connected between electric lines B and J.

An electric line C is drawn out from the connection point between the relay contact 2X and the relay 2X.

Between electric circuits B and C, there is a series branch circuit consisting of the B contact of timer ITM, the A contact of timer 2TM, the a contact of relay BX (see Figure 5), the a contact of relay 5X, and the a contact of relay 1X. , the a contacts of the switch 03PB are connected to each other.

In Fig. 5, between electric circuits B and J, there is a series branch circuit consisting of the b contact of relay 1X, the abnormality countermeasure auxiliary relay 8X, the a contact of relay 8X, the b contact of relay IX, the b contact of timer 4TM, and the stop circuit. A series branch consisting of the time limit timer 3TM, a series branch consisting of the relay contact 8X, the a contact of the relay 3X, and the abnormality countermeasure auxiliary relay 3X, and the relay contact 8X
3X, the a contact of the timer 3TM, and the reverse operation time limit timer 4TM, a series branch consisting of the relay contacts 8X and 3X, the a contact of the relay 4X, the reverse command relay 4X, and the relay contact 8X. , 3X, 4X, the b contact of relay 1X, and a series branch circuit consisting of foreign object removal confirmation relay 5X are connected, respectively.

The a contact of the relay 1X and the a contact of the relay 8X are connected in parallel with each other, and similarly, the b contact of the relay 1X and the a contact of the relay 3
A contact of X, a contact of timer 3TM and a of relay 4X
The contacts, the b contact of relay 1X and the a contact of relay 5X, are connected in parallel.

Further, a series branch circuit consisting of the a contact of the relay 7X and the unlock command auxiliary relay 7X is connected between the electric lines B and 4.

The a contact of the relay 6X is connected between the connection point between the relay contacts 7X and the electrical circuit A.

Electric circuit A'1. Between J, there is a series branch circuit consisting of diode D4, the b contact of relay 3X, diode D5, and right run command relay IFX, and the diode D4, relay contact 3X,
A series branch consisting of the diode D6, the a contact of the relay RX, and the heavy command detection relay BX is connected.

A of relay LSX1 (see Figure 7) is connected between electric circuits A and J.
A series branch consisting of contacts, the a contact of relay LSX2 (see Figure 6), the a contact of relay LSX, and the foreign object detection auxiliary relay CX, the a contact of relay 4X, the b contact of relay LSX, and the reversal auxiliary relay RY. A series branch is connected, and the a contact of the relay RY is connected in parallel to the relay contact LSX.

Electric line A. Between 4 and 4 are the b contacts of the two switches R8S and the foreign object detection relay LS, which have already been explained with reference to FIG.
and a of relay 2RX (see Figure 7).
Contact and diode D7, b contact of relay RY, relay I
A series branch line consisting of the b contact of FM, the left running relay IRM, and the b contact of the switch RLS already explained in FIG. 2, and a series branch line consisting of the relay contact 2RX, diode D9, and heavy command detection auxiliary relay RX. , the a contact of relay RY, the diode D1□, the b contact of relay IRM, the right running relay IFM, and the switch FLS1 explained in FIG.
a series branch consisting of the b contact of relay IAX (see Fig. 6), a b contact of relay GX (see Fig. 6), diode D16, and right run command relay 2FX. , the a-contact of relay IFX, the diode DI6, the series branch consisting of the above-mentioned relay 2FX, and the a-contact of relay RY,
Diode D17. A series branch consisting of the above-mentioned relay 2FX is connected.

”1 The connection point between relay contact GX and diode D15 is
Diode D7 and relay contact R via diode D8
It is also connected to the connection point between diode D9 and relay RX via diode D10.

The connection point between the a contact of the relay RY and the diode D1□ is connected to the diode D9 and the relay RX via the diode D1□.
connected to the connection point.

Further, the connection point between the a contact of the relay IFX and the diode D16 is connected to the connection point between the diode D12 and the relay contact IRM via the diode D13.

A connection point between the a contact of the relay 1AX and the b contact of the relay GX is connected to the electric circuit B (see FIG. 4) via a diode D14.

Between the electric circuit B and the electric circuit C (see Fig. 4), the a contact of relay BX and the a contact of switch l5PB explained in Fig. 2 are connected.
Contacts are connected in parallel.

The connection point between the relay contact RY and the diode D17 is drawn out as an electric path.

In FIG. 6, the relay L is connected between the electric circuits A and 4.
A series branch line consisting of the b contact of SX, the abnormality indicator light EPI-, a series branch line consisting of the a contact of relay IFX, the a contact of relay RX, and the heavy command detection relay BX, and the switch explained in FIG. IPB a contact, relay GX b contact,
A series branch line consisting of diode D19, the a contact of relay 2FX, and the relay BX; a series branch line consisting of the contact IPB and the open command relay IAX; a series branch line consisting of the contact IPB and the open command indicator OPL; The a contact of relay 3X, the series branch consisting of the abnormality countermeasure auxiliary relay GX, and the a of relay 4X
Contact, b contact of relay LSX2, reversal auxiliary relay RY2
The series branch circuit consisting of the b contacts of the two switches R852 explained in FIG. 2, and the foreign object detection relays I- and S X2
The series branches consisting of are connected respectively.

The a contact of the relay RY2 is connected in parallel to the relay contact LSX2.

In addition, between the electric wire and J, there is a diode DI8, a relay R
A series branch consisting of an a contact of X and a relay BX is connected, and the contact RX is connected in parallel with the relay contact 2FX.

In Fig. 7, between electric circuits A and J, a of relay 2RX is connected.
A series branch consisting of the contact, diode D20, and left run command relay 2RX, and the relay contact 2RX and diode D2.
3. b contact of relay RY2, b contact of relay 2FM, left traveling relay 2RM, switch RLS2 explained in Fig. 2
A series branch line consisting of the B contact of relay 2FX, an a contact of relay RX, a series branch line consisting of the heavy command detection relay BX, the a contact of switch 2PB explained in Fig. 2, and open command relay 2AX. A series branch line consisting of the a contact point of the relay 3X and a series branch line consisting of the abnormality countermeasure auxiliary relay GX are connected.

A series branch circuit consisting of the a contact of relay RY and the a contact of relay RY2 is connected between the connection point of the relay contact RX and relay BX and the electric line A, and the relay 2AX has an open command indicator light OPL. connected in parallel.

Between electric circuits A and J, there is a series branch circuit consisting of the a contact of relay RY, diode D29, right run command relay 3FX, the a contact of relay 2FX, diode D3o, and the relay 3.
A series branch line consisting of FX, a contact a of relay 2AX, a b contact of relay GX, a diode D31, a series branch line consisting of relay 3FX, the relay contact 2FX, and diode D26.
, the b contact of relay RY, the b contact of relay 2RM, the right traveling relay 2FM, and the b contact of switch FLS2 explained in FIG. 2 are connected in series.

The connection point E between the relay contact GX and the diode D3 is
Diode D2, via diode D2o and relay 2
It is connected to the connection point G of RX, and the diode D24
It is connected to the connection point H between diode D23 and relay contact RY2 through
It is connected to the.

The connection point F between the relay contact RY1 and the diode D29 is the diode D27, the a contact of the relay 2FX, and the relay B.
D27. D28, b contact of relay GX, relay 2AX
It is connected to the electric line J via.

Further, point F is connected to point G via diode D22, and connected to diode D2 via diode D25.
6 and relay contact RY, is connected to the connection point ■.

The point H is connected to relay contact R via the a contact of relay RY2.
It is connected to the connection point between Y1 and relay contact 2RM, and point I is connected to the connection point between relay contact RY2 and relay contact 2FM via the a contact of relay RY1.

Between the electric circuits B and C, the a contact of relay BX and the a contact of switch 25PB in FIG. 2 are connected in parallel.

Between electric circuits A and J, there is a contact of relay 4X, and relay L.
A series branch consisting of the b contact of SX, the reverse auxiliary relay RY, and the b contact of the two switches FS82 in FIG.
A series branch consisting of foreign object detection relay LSX, and relay LS
A series branch consisting of the B contact of X2, the foreign object indicator EPL, the A contact of relay IFM, the A contact of relay 2M, and the chime C.
The series branches consisting of H are each connected.

The a contact of the relay RY is connected in parallel to the a contact of the relay LSX1, and the b contact of the relay LSX2 is connected to the relay LS.
The b contact of X1 is connected in parallel, and the a contacts of relays IRM, 2FM, and 2RM are connected in parallel to the relay contact IFM.

In FIG. 8, electric lines R and T (see FIG. 3) are connected to electric lines R1 and T1 through the a contacts of relay 2M, respectively.

Reference symbols M, M2 in FIG. 8 are reversible motors for driving the movable shelves 1 and 2 in FIGS. 1 and 2, respectively.

The moderate terminal of motor M1 is connected to electric circuit R1 through the a contact of relay IRM and the a contact of relay IFM in parallel, and the moderate terminal of motor M2 is connected to electric circuit R1 through the a contacts of relays 2RM and 2FM in parallel. ing.

In addition, the reverse rotation terminal of motor M1 is connected to the a contact of relay IRM, and the normal rotation terminal of motor M is connected to the a contact of relay IFM.
Through the contacts, the reverse terminal of motor M2 connects to relay 2RM.
The normal rotation terminal of motor M2 is connected to relay 2 through the a contact of
They are each connected to the electric circuit T1 via the FM a contact.

Between the electric lines R,,T, there is a switch APR in Fig. 2.
A series branch consisting of the a contact and the buzzer BZ is connected.

In Fig. 9, between electric circuits R and T, there is a series branch line consisting of the illuminating lamp 0FL (see Figs. 1 and 2) and the a contact of the relay OAX, and a series branch line consisting of the a contact of the illumination lamp IFL and the relay IAX. A series branch line formed by the a-contacts of the lighting lamp 2FL and the relay 2AX are connected to each other.

Note that a diode for preventing back electromotive force is connected in parallel to each relay, timer, and indicator light.

It is assumed that most of the electric circuits described above are housed, for example, in a side plate at one end of the stationary shelf 0, and each transom is connected with a flexible cable or the like as appropriate.

Next, the operation of the present invention will be explained.

First, as a preliminary operation, after confirming that the power indicator light IWL is on, close the key switch KS (see Figure 3), energize the relay IM, close its a contacts IM and IM, and connect the electric circuits A and J. energize the DC power supply.

As a result, the indicator light 2WL in Fig. 4 lights up to indicate the preparation for operation, and the timer 1'l'M is energized, and after a certain period of time, for example 2 seconds, its a contact closes and the l) contact opens. .

As a result, the contacts ITM, CX, and relay 1X are energized, and the a contact of relay 1X is turned on and the b contact is turned off.

Now, assuming that all the shelves 0, 1.2 are gathered together, limit switches RE, S, are provided on the left side of each movable shelf 1, 2 in FIG.

RLS2 is activated and these b contacts are off.

From this state, when the push button switch OPB is pressed to form a passage between the shelves 0.1, the relay OA in FIG.
When X is excited, the indicator light OPL lights up to indicate that a command has been issued.

Excitation of relay OAX causes its a contact OAX, diode D1, relay contact 3X, diode D2, and loop contact 2.
X, relay contact 7X, relay contact CX (this contact is the already energized relay L S X ).

L S As a result, AC power is applied to the electric lines R,,T.

Further, the contact OAX, the diode D1, the contact 3X, the diode D3, and the operation time limit timer 2TM are energized to start the timer 2TM.

Furthermore, the contact OAX, the electric line A', the diode D4,
Relay contact 3X, diode D5, and relay IFX are energized, and relay IFX is excited (see FIG. 5).

By energizing the relay IFX, the a contact IFX, diode DI3, relay contact IRM, relay IFM, and limit switch contact FLS1 are energized, and the a contact IFM of the relay IFM in FIG. 8 is turned on, and the motor M1 is turned on.
Power is supplied to the normal rotation circuit of the motor M from electric lines R,,T,
1 rotates forward to move the movable shelf 1 to the right in FIG.

In parallel with this, by excitation of the relay 1FX, the a
Contact IFX, diode D16, and relay 2FX (see Figure 5) are energized, and relay 2FX a is also turned on in Figure 7.
Contact, diode D26, relay contact RY, relay contact 2RM, relay 2FM, limit I/switch contact FL
S2 is energized, the a contact 2FM of relay 2FM in FIG.
,,T, and the motor M2 rotates normally to move the movable shelf 2 to the right in FIG.

In this way, when the shelves 1 and 2 move to a predetermined movement limit, each limit switch FLSI and FLS2 is activated to open their contacts, and the excitation of each relay IFM and 2FM is cut off. The power supply is cut off to stop the movement of the movable shelves 1 and 2.

Here, a passage with a predetermined width is formed between the shelves 0 and 1.

Next, when attempting to form a passage between the shelf 2 and the existing shelf or wall surface from the above state, first, the push button switch OPB is returned to its original state, and then the push button switch 2PB is Manipulate suppression.

However, if the push button switch OPB has not been reset,
As mentioned above, relay OAX remains energized, and therefore relays IFX and 2FX also remain energized, so if push button switch 2PB is further pressed in this state, the 71's I Heavy command detection relay BX is energized via switch contact 2PB, relay contact GX, diode D28, and relay contact 2FX.
Emergency stop relay 2X in Fig. 4 is energized via relay contact OAX, diode D3, and electric line B in Fig. 4, and relay contact BX and electric line C in Fig. 7, and the b contact of relay 2X is turned off. As a result, the excitation of the relay 2M is cut off, the relay contacts 2M and 2M in FIG. 8 are turned off, and power is no longer supplied to the motor M15M2.

In this way, if multiple opening commands are issued between shelves, it will be impossible to move the movable shelf. When an open command is issued, the moving shelf immediately stops.

The reason why the movement of the shelves was stopped due to heavy commands is that while a worker was in between the aisles that were being formed due to the first command, other workers were ordered to open the aisles to form a new aisle elsewhere. In this case, if the shelves were to move according to the latter command, the passage where the former entered would be narrowed and the former would be exposed to danger, so this is to avoid this. This is to stop the movement and let the latter know that it is a heavy command.

Therefore, when attempting to form a passage between shelf 2 and the right shelf or wall from the above-mentioned state, first reset the push button switch OPB and return each relay that was in the activated state to its original state. Afterwards, push button switch 2PB is pressed.

As a result, relay 2AX in FIG. 7 is excited, and its a contact 2AX, relay contact GX, diode D24,
Relay contact RY2, RU contact 2FM, relay 2RM, and limit switch RLS2 are energized, and relay 2RM is energized.

At the same time, relay 2RX is excited via the relay contacts 2AX, GX, and diode D21, and its a
Self-retained by contacts.

Then, relay contact 2RX, diode D7, relay contact RY, IFM, relay IRM, and limit switch RLS in FIG. 5 are energized, and relay IRM is excited.

By excitation of this relay IRM and the above-mentioned relay 2RM, the electric circuit R,
, T, and the motor M15M2 rotates in reverse to move the movable shelves 1 and 2 to the left in FIG.

In this way, when the shelves 1 and 2 move to a predetermined movement limit, each limit switch RLSI and RLS2 is activated to open their contacts, cut off the excitation of each relay 1RM and 2RM, and cut off the power supply to the motor MI9M2 in FIG. 8. Mobile shelf 1
, 2 is stopped.

Here, each column 0, 1, and 2 are gathered together,
A passage of a predetermined length of 1" is formed between the shelf 2 and another shelf or wall surface to the right of the shelf 2.

By the way, for example, as mentioned above, each column 0. 1. When the movable shelves 1 and 2 are moved to the right in FIG. 2 from the state in which the shelves 2 and 2 are gathered together to form a passage between the shelves 0 and 1, the separation between the shelves 2 and the right Since the distance between Shelf 2 and the shelf or wall is narrowing, if at that time there is a person or a foreign object falls between Shelf 2 and the shelf or wall to its right, When the foreign object detection or safety bar switch FSS2 is activated by touching a human body or a foreign object, its switch contact FSS2 in FIG. 7 is turned off, and the excitation of the relay L S Contact LSX is turned off and excitation of foreign object detection auxiliary relay CX is cut off.

As a result, relay contact CX in the excitation circuit of relay 2M in FIG. 4 is turned off and excitation of relay 2M is cut off, and relay contact 2 in the motor drive circuit in FIG.
M and 2M are turned off, the power supply to the motors is cut off, and the movable shelves 1 and 2 stop.

Moreover, by cutting off the excitation of the relay CX, the excitation of the relay 1X in FIG. 4 is cut off, and each of its contacts returns to its normal state.

This energizes the relay contact OAX (turned on by operating the switch OPB) in FIG. 4, the diode D1, the electric circuit B1, the relay contact 1X and the relay 8X in FIG. 5, and energizes the relay 8X.

Relay 8X is self-maintained by its contacts.

Furthermore, the timer 3TM is energized by the excitation force of the relay 1X being reduced.

After the timer 3TM is energized, for example, after one second has elapsed, its a
It is designed to close the contact, so the timer 3T
One second after energizing M, timer 4TM is energized.

At the same time as the timer 4TM is energized, the relays 4X and 5X are also energized and are self-held by their respective contacts.

In addition, the A contact shown in Figure 4 of Timer 3TM turns on 1 second after the timer is energized, so OAX,
The electric circuit consisting of D,, 3TM, 2X, 4X (turned on by energizing relay 4X as described above) and 2M is energized, and relay 2M is energized.

The contact point 2M can also be opened in Fig. 8 by energizing relay 2M.
, 2M are turned on and power can be supplied to motors M, , M2.

Due to the excitation of the relay 4X, the relay contacts 4X, LSX, and relay RY in FIG. 7 are energized, and the relay RY is energized.
.

is excited and self-held by its contact RY.

The relay contact RY in Fig. 7 is
,, diode D25, relay RY, a contact, relay contact 2FM, relay 2RM, limit switch RLS2
is energized, and relay 2RM is energized.

Further, by energizing the relay RY, the relay contact RY, the diode D22, and the relay 2RX are energized, and the relay 2RX is energized.

By excitation of this relay 2RX, the point a in FIG.
Contact 2RX, diode D7, relay contact RY, IFM
, relay IRM, and limit switch RLS are energized, and relay IRM is excited.

By energizing the relay IRM and the relay 2RM in this way, the reversing circuit of the motor M19M2 in FIG. 8 is energized, and the motors M, M2 are reversed to move the movable shelves 1 and 2 to the left in FIG. 2. .

When the time required for the movable shelves 1 and 2 to move backward an appropriate distance, for example, about 10 cm, has elapsed, the timer 4TM (
(see Figure 5) operates and opens its b contact, and the timer 3
Cut off the power to TM and turn off the a contact of timer 3TM.

As a result, power is cut off to relay 2M in Fig. 4 (relay contact 3X inserted in parallel with timer contact 3TM).
is turned off by the excitation of the relay 3X), the relay contacts 2M and 2M in FIG. 8 are turned off, cutting off the power supply to the motors M1 and M2, and stopping these motors.

At this point, the movement of the movable shelves 1 and 2 is stopped.

In this way, the movement of the movable shelf is temporarily stopped by the detection operation of the safety bar switch FSS2, and after the set time of the timer 3TM, for example, 1 second, has elapsed, the movable shelf moves in the opposite direction, and the set time of the timer 4TM has elapsed. As a result, movement in the opposite direction is also stopped, so people in the passage between shelf 2 and the shelf or wall on the right side can easily escape, and foreign objects can also be easily removed. .

However, like this safety bar switch FSS.

The fact that shelves 1 and 2 move more or less to the left in FIG. 2 based on the operation of shelf 0. Since the passage between 1 and 3 is narrowed, if there is a person inside the passage, that person is in danger.

However, in that case, the safety base switch R3S on shelf 1,
touches the human body and its contact point R3S.

(see Fig. 5) opens, and the excitation of relay LSX is cut off.

When the excitation of relay L S When the a contact is closed, the relay BX is excited via the relay contacts R, Y, the electric circuit D, the diode D18 in FIG. 5, and the relay contact RX, and when the a contact is closed, the relay contact in FIG. OAX, diode D1, relay contact B
Emergency stop relay 2X is energized via X.

When relay 2X is energized, its a contact closes and is self-held, and when its b contact opens, the excitation of relay 2M is cut off, resulting in relay contact 2M in FIG.

2M is turned off, the power supply to the motor M19M2 is cut off, and the movement of the movable shelves 1 and 2 is stopped.

In this way, the safety of people between shelves 0 and 1 is ensured.

Furthermore, even when the shelves 1 and 2 are moved a certain distance to the left in FIG. Since it may be difficult to remove people or foreign objects from the space, it is necessary to move the shelves 1 and 2 to the left by some means to further widen the passage on the right side of the shelf 2.

To do this, first reset the active open command switch OPB and reset each relay, then auxiliary switch A.
While the P I3 is pressed, the open command switch 2'PB is suppressed.

Due to the suppressing operation of the auxiliary switch APB, the unlock command relay 6X is energized via its a contact and relay contact CX in FIG. 4, and when the a contact is turned on, the unlock command auxiliary relay 7X in FIG. is energized and its a contact closes, so that the relay contact 6X, the relay contact 7X, the electric circuit B, and the relay contact 3X in FIG.
, diode D2, relay 2M via relay contact 6X
The relay contacts 2M and 2M shown in FIG. 8 are closed, allowing power to be supplied to the motors M1 and M2.

Then, when the push button switch 2PB is pressed, the loop 2AX shown in FIG. 7 is energized, its a contact is closed, and the relay contacts 2AX, GX,
Diode D24, relay contacts RY2, 2FM, relay 2RM, and limit switch RLS2 are energized, and relay 2RM is excited.

In addition, the above contact point 2AX. Relay 2RX is excited via GX and diode D2, and its a contact is closed and self-maintained, and relay contact 2RX in FIG.
Diode D7, contact RY, IFM, relay IRM
, limit switch RLS, is energized and relay IRM
is excited.

In this way, the relays IRM and 2RM are energized, which energizes the reversing circuits of the motors M, , M, in FIG.
2 moves to the left in FIG. 2, and the passage on the right side of the shelf 2 widens, so that people in the passage can easily escape and foreign objects can be easily removed.

Note that while the auxiliary switch APB is operated, the automatic stop and automatic reverse circuits due to the activation of the safety bar described above will not operate, so the buzzer BZ shown in Figure 8 will sound to alert you. It looks like this.

If the various dangers mentioned above are detected in advance, emergency stop switches 08PB and 15PB are activated.

The moving shelf can be brought to an emergency stop by pressing the 2SPB.

That is, each of the above switch contacts is a of the heavy command detection relay BX.
Since it is inserted in parallel with the contact, suppressing one of the emergency stop switches in Section 2 has the same result as relay BX being energized, and as mentioned earlier, the moving shelf is in an emergency state. By stopping the vehicle, you can prevent danger in advance.

When the - of open command switches OPB, IPB, and 2PB is pressed and a passage is formed between any of the shelves, relays OAX, IA, and X are activated.

Since any one of the illumination lights OFL, IFL, and 2FL in FIG. 9 is in an excited state, the one located in the passage "-" lights up, illuminating the passage.

This illumination light is turned off by restoring the suppressed opening command switch after completing the work in the passage, so it is possible to prevent wastage of power, and while the illumination light is on, It also has the effect of notifying third parties that work is underway within the corresponding passage.

Also, relay IFM and IRM while the movable shelf is being moved.

Since one of 2FM and 2RM and relay 2M are energized, their a contacts close, and the chime CH shown in FIG. 7 emits a sound to alert the surroundings.

As described above, according to the present invention, the detection operation of the safety bar switch widens the passage between the shelves that was being narrowed by the moving shelves going backwards, and also widens the passage that was being narrowed by the moving shelves backwards. Since the movement of all shelves is stopped by the detection activation of the safety bar switch, it is possible to stop the movement of all shelves based on the activation of the safety bar switch. The safety of people in the passageway that is being narrowed by the backward movement of the shelves is ensured, and it is possible to provide an electric movable shelf that is safer than conventional ones.

In addition, when various dangers are detected in advance, an emergency stop circuit is activated by operating an emergency stop switch to prevent the danger from occurring, and the shelf is moved backwards based on the operation of a safety bar switch. Since the movement of the shelves is stopped by activating the emergency stop circuit described in -4- in the event of a dangerous situation occurring in the narrowing aisle, there is an effect that the circuit configuration can be simplified. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the arrangement of an electric movable shelf having the device of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a circuit diagram showing an example of the power supply section of the device of the present invention, and Figs. Fig. 7 is a circuit diagram showing an example of the control unit in the device of the present invention, Fig. 8 is a circuit diagram showing an example of the motor drive unit in the device of the present invention, and Fig. 9 is an example of the lighting unit in the device of the present invention. FIG. O...Fixed shelf, 1,2...Moveable shelf, O
PB, IPB. 2I) B...Open command push button switch, RLS,...
FLS,. RLS2. FLS2・・・・Limit switch,
R8S, R852゜FSS2...Foreign object detection and safety bar switch, 2M...Motor drive circuit relay, 2X...Emergency stop rule 3TM...
...Stop time limit timer, 3X. 8X...Auxiliary relay for troubleshooting 4TM...
・・Reverse operation time limit timer, 4X・・・Reverse command relay IFX, 2FX, 3FX・・・Right run command relay, LSX, LSXI, LSX2・・
...Foreign object detection relay, IRM. 2RM...Left running relay, IFM, 2FM...
...Right running relay, OAX, IAX, 2AX...
...Open command relay, 2RX...Left travel command relay, M,,M,,...Drive motor.

Claims (1)

[Scope of utility model registration request] A plurality of movable shelves arranged side by side, a reversible motor for driving the movable shelves provided for each movable shelf, an open command circuit activated by operation of an open command switch, and an open command circuit activated by the operation of this open command circuit, Under the condition that the motor drive circuit that enables each drive motor to be energized and the operation of the open command circuit mentioned above, one operates in response to the operation of the limit switch that detects the left and right movement limit of the movable shelf. a right-handed running circuit and a left-handed running circuit that energize the rotation circuit or the reverse circuit;
A heavy command detection circuit that is activated by operating another open command switch while the open command circuit is in operation, and an emergency stop circuit that is activated by the operation of this heavy command detection circuit (7) and stops the operation of the motor drive circuit. a safety bar switch that is installed on the movable shelf so as to face the work passage surface to be formed and is activated when a foreign object such as a human body comes into contact with it; and a foreign object detection circuit that is activated by the operation of this safety bar switch. , a reversal command circuit that reverses the operation of the right-hand travel circuit and left-hand travel circuit to reverse the operation of the motor by the operation of the safety bar switch; and a reversal command circuit that reverses the operation of the motor by the operation of the safety bar switch; , a reversal auxiliary circuit that is activated when a foreign object detection circuit corresponding to the safety bar switch is activated based on the activation of a safety bar switch facing the passage between the shelves that is being narrowed; and a heavy command detection auxiliary circuit that activates the emergency stop circuit.