JPH033806A - Automatic control device for movable rack - Google Patents

Abstract

PURPOSE:To improve the safety by providing a vertically circulating movable rack constructed so that as far as it is not once stopped, the turning direction cannot be changed during turning and when it is stopped, a motor rotating direction setting circuit is switched off. CONSTITUTION:When the power supply switch sw is turned on to operate an initial state setting circuit 1, each output Q of starting RS-FF2 turning direction setting RS-FF3 and stopping RS-FF7 becomes a low level L to enable up-down setting by UP and DOWN switches SU, SD. By this arrangement, only when a motor is stopped, the turning direction can be set. When a stop switch ST is operated, the output Q of the start RS-FF2 is reset to L through an OR gate 5, and both outputs of the stopping RS-FF7 and turning direction setting RS-FF3 become L.

Description

[Detailed Description of the Invention] The present invention is based on the earlier patent application No. 36 of 1988, the title of the invention is “
This invention relates to improvements to "automatic control devices for mobile shelves." The one in the previous application works normally without any problems as long as the operating method is not mistaken, but since the key switch for setting the up and down rotation directions is located nearby, If you accidentally touch the key switch that sets the down direction after setting the down direction, or if you accidentally touch the key switch that sets the up direction after setting the down direction, the rotation direction of the motor may change. Because of the rapid reversal, there was a problem in that there was a risk that the items stored on the movable shelf would not only fall off the shelf, but also could cause accidents such as damage to mechanical parts.

Therefore, the present invention provides a device that eliminates the above problems and operates safely.

The present invention will be described in detail below with reference to the drawings.

Figure 1 shows a large number of movable shelves (IK, 2, 3, 4, 5, 6K) connected in a loop shape using endless chains, etc., and circulated by a motor (not shown). This is what I did.

The direction of rotation of the clock hands is defined as DOWN, and the direction of rotation of the counterclockwise hands is defined as UP. SP is a predetermined stop position at which each movable shelf (nk) is stopped.

FIG. 2 is a circuit diagram of the present invention for automatically controlling the circulating type movable shelf shown in FIG. 1.

This example circuit is constructed using a standard C-MO3IC. VDD is the positive terminal of the DC power supply, ■S
S is connected to the negative electrode, respectively.

SW is a power switch, and when short-circuited, the DC power supply VD
Supplies D to each circuit.

The moving shelf detection circuit includes a switch MS, a resistor R, an inverter G3. Consists of 4 monostable multibibreaks,
The switch MS is installed so that it is turned on when each movable shelf (nk) is at the stop position SP, and the contact point is ■
It is connected to VDD through SS and resistor R, and the connected contact of resistor R is connected to the input IN of monostable multi-bi break 4 through impark G3, and the output Q of this monostable multi-bi break 4 is AND Gate G]0 is connected to the input.

The rotation direction setting circuit includes an up switch 8U, a down switch SD, and a two-man powered AND game 1-Gl and G2.
Three-man OR gate G6. R5-FF for setting rotation direction
(Flip-flop) 3. 2nd driver DR2, 2nd
Consists of relay RC2, up switch 8U
is AND goo h R3-F for rotation direction setting via G1
The down switch SD is connected to the set human power S in (3), and the down switch SD is connected to the reset human power R in (3) through AND gate G2 and OR gate G6. The output Q of R3-FF (3) is the second
It is connected to drive the second relay RC2 via the driver DR2.

The rotation control circuit includes an up switch SU, a down switch SD, a stop switch ST, and an AND gate Gl.
and 62.2 Human-powered OR Game 1-G4 and G5. R3-FF (flip-flop) for starting 2. Impark G9. ANDGI0. OR gate Gl 1. Gate-based delay circuit6. R5-FF (flip-flop) for S1-Jub 7. 1st driver DR1, 1st relay RC
It is composed of I. Up switch SU, down switch
One contact of the switch SD and stop switch ST are both connected to the positive pole VDD via the power switch SW, and the other output side contact is connected to the negative pole VDD via the resistor R, respectively.
Connected to S. The output side of the up switch SU is connected to the input S of the start R5-FF (2) via an AND gate G1 and an OR gate G4, and the output side of the down switch SD is connected to an AND gate G2. It is connected to the set human power S of the start R3-FF (2) via the OR gate G4. The output side of the stop switch ST is connected to the start R3-FF via the OR gate G5.
It is connected to the reset human power R of (2). Stato R
The output Q of 3-FF (2) is passed through a delay circuit 6 using a multi-stage gate to the set power S of stop R3-FF (7) and the inverter G9. AND gate G10. Each is connected to the reset human power R of stop R3-FF (7) via an OR gate Gll. R5- for stop
The output Q of FF (7) is connected to drive the first relay RCI via the first driver DRI.

The initial state setting circuit] generates a voltage at the "L" level only at the moment when the power switch SW is short-circuited and the power is turned on, and the OR gate G5. G6. Gl], R3-FF for start (2), R3-FF for rotation direction setting (
3), each manual reset R of R3-FF (7) for stop
is applied to set the output Q of each R3-FF to r L J level.

The output Q of R5-FF (2) for start and the output Q of R3-FF (7) for stomp are connected to the inputs of two-man powered AND gates 1-61 and 62 through a two-man powered NOROR gate G7. ing.

Output Q of R3-FF (7) for stop is inverter G8
．． Monostable multi-by-break 5.3 human-powered OR gate G
It is connected to the reset manual power R of R8FF (3) for setting the rotational direction via 6.

Although the connections between the contacts of the first relay RC1 and the second relay RC2 are not shown, when the second relay RC2 is off and the second relay RCI is on, the movable shelf (nk)
Rotate the motor so that it rotates in the DOWN direction,
When both the second relay RC2 and the second relay RCI are on, the wiring is such that the rotation direction of the motor is set so as to rotate the movable shelf (nk) in the UP direction.

Next, the operating state of the present invention will be explained.

When the power switch SW is switched from the off state to the on state, the initial state setting circuit 1 is activated, and the
3-FF (2), R3FF for setting rotation direction (3),
Set each output Q of stop R3-FF (7) to rLJ level. In this case, R3-FF for setting the rotation direction
Since the output Q in (3) is at the rLJ level, the second relay RC2 is in the OFF state, so the movable shelf (nk) is turned down.
The rotation direction of the motor is set so that the motor rotates in the same direction, but since the output Q of stop R3-FF (7) is at the “L” level and the first relay RCI is in the off state, the motor doesn't work. R3FF for starting (2
) and each output Q of stop R3-FF (7) are both “
Since the outputs of the NOR gates 1-G7 are at the rHJ level, one input of the two-man AND gates G] and 62 is also at the rH level.
J level, and the "H" level output signal of up switch 8U or down switch SD is sent to R3-FF (2) for starting and R3-FF (3) for setting rotation direction.
) is in a state where it can be transmitted to each set manual power S and reset R.

In other words, R3-FF for start (2) and R for stop
Only when each output Q of 3-FF (7) is at r L J level, up switch SU or down switch S
The setting can be made by switching between the UP direction and the DOWN direction depending on D. In other words, switching between UP and DOWN is possible only when the motor (not shown) is stopped.

Next, the operating state of the circuit when the up switch SU is touched will be explained. The output of AND gate G1 is O on the one hand.
The output Q of the scoot R3-FF (2) is set to the "H" level via the R gate G4, and the output Q of the rotation direction setting R3-FF (3) is set to the rHJ level. Since the output Q of the rotation direction setting R5-FF (3) is at the rHJ level, the second relay RC2 is turned on via the second driver DR2, and the movable shelf (n
k) Set the rotation direction of the motor so that it rotates in the UP direction. The output Q of the start R3-FF (2) is passed through a delay circuit 6 using gates connected in series in multiple stages.
Since the output Q of stop R3-FF (7) is set to the rHJ level, the first
Since the relay RCI is turned on, the motor starts and continuously rotates the movable shelf (nk) in the UP direction. The reason for inserting delay circuit 6 is up switch S.
This is for timing adjustment to operate the first relay RC1 after the second relay RC2 operates reliably and determines the direction of rotation of the moku after issuing a command signal with the U or down switch SD. be.

When each movable shelf (nk) reaches a predetermined stop position SP, the switch MS is temporarily touched to turn it on, and the arrival signal is transmitted via the inverter G3 and the monostable multivibrator 4 to the two-man powered A N I) Since the output Q of the start R3-FF (2) is at the "I4" level, the output of the inverter G9 is at the "L" level, and the output of the AND gate G10 is supplied to one input of the AND gate G10.
The output also maintains the "L" level state. In other words, if you touch the up switch SU, the mobile shelf (nk) will go up.
The motor continues to rotate as it rotates in the direction.

Next, when the stop switch ST is touched, the test start R3-FF (2) is reset via the OR gate G5 and the output Q is switched from the "I1" level to the "L" level, so the output of the inverter G9 is "L". ” level to r
When the movable shelf (nk) reaches a predetermined stop position SP, the AND gate GIO receives the arrival signal generated via the inverter G3 and the monostable multivib break 4, and performs an OR operation. It is transmitted to the stop R3-FF (7) set input via gate Gll, and the output 0 is changed from rHJ level to rL
Switch to J level and set the first driver DPI and
The relay RCI is turned off to stop the movement, and the movable shelf (nk) is stopped at a predetermined stop position SP.

The edge where the output Q of stop R3-FF (7) switches from rHJ level to "L" level is connected to inverter G8.
is captured by the monostable multi-by-break 5, the reset pulse is taken out, and is supplied to the reset manual power R of R3-FF (3) for setting the rotation direction via the OR gate G6, which outputs Q.
from the rHJ level to the rLj level, and the second
By returning driver DR2 and second relay CR2 to the OFF state, power consumption can be kept to a small amount when not in use.

For the above, touch the up switch SU and move the shelf (nk
) rotates in the UP direction, and while the movable shelf (nk) is rotating, press the stop switch S.
I explained the operating state in which the desired movable shelf (nk) is stopped at a predetermined stop position by touching T.
ANDNO if you touch the down switch SD
R3F for setting rotation direction via gate and OR gate G6
F (3) is set to the output rLJ level, the second driver DR2 and the second relay RC2 are turned off, and the moving tlltl(nk) is set to rotate in the DOWN direction. The operating states of the other circuits are exactly the same as when the above-mentioned up switch SU is touched and later the switches S1 to ST are touched, so the explanation will be omitted.

In the example, each R3-FF (2, 3, 7) human power R,
I constructed a circuit using a device in which each output Q is inverted when S switches from "L" to "H" level, but when inputs R and S switch from rHJ to "L" level, the output It is of course conceivable to construct a circuit using R5-FF in which Q is inverted.

The switch MS in the movable shelf detection circuit of the embodiment is a mechanical micro switch, an electronic LED and a phototransistor (a photo ink converter or a lead).
It is conceivable to use a switch or the like.

In the embodiment, an AND gate is used to control the output transmission of the up switch SU and the down switch SD, but another method is to use a NOR gate 1-1NAND.
A gate, exclusive NOR, analog switch, etc. may also be used.

In the present invention, after touching the up switch SU or the down switch SD to set the rotation direction of the movable shelf (nk) and activate the control circuit, the movable shelf (nk) is not stopped for -degrees. As long as the direction of rotation cannot be changed, the direction of rotation of the movable shelf (nk) will not suddenly reverse, so there will be no shocks, such as items falling off the shelf or damage to mechanical parts. This eliminates the risk of accidents.

Furthermore, in the present invention, when the movable shelf (nk) stops at the stop position, the output Q of the rotation direction setting R3-FF (3) is set to "L".
This is an automatic movable shelf automatic control device that has practical effects such as being able to save electricity costs by turning off the second relay RC2.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the arrangement of rotating movable shelves. FIG. 2 is a circuit diagram showing an embodiment of the present invention.

Claims (1)

[Claims] When a desired movable shelf is stopped at a predetermined stop position by selecting and operating the rotation direction of a large number of movable shelves arranged in series in either the up or down direction, the desired movable shelf stops at a predetermined stop position. In a circulating type movable shelf automatic control device that applies a stop signal before reaching the stop position, when the movable shelf is stopped, the rotating direction can be either up or down. It can be set freely, but after setting the rotation direction and activating the control circuit, the rotation direction cannot be changed unless the movable shelf is stopped once, and the movable shelf stops at a predetermined stop position. An automatic movable shelf control device characterized in that the rotation direction setting circuit of the motor is then returned to an OFF state.