JPS5890447A - Delivery speed control method of conveyor equipment - Google Patents

Abstract

PURPOSE:To make it possible to shorten the cycle time by controlling the speed of a tansfer bar which follows so as to keep a prescribed interval while measuring the interval between the transfer bars in a synchronizer where a plural member of transfer lines is directly connected. CONSTITUTION:A bar 10B is moved by a pulse motor 20B via a reduction unit 21B, a torque limiter 22B, a pinion gear 23B and a rack gear 24B. A pulse generator 30B generates a number of pulses proportional to the number of revolutions of the pulse motor 20B, and a reversible counter 60 counts the number of the pulses. Simultaneously, pulse from a pulse generator 30A on the preceeding side are inputted, and their differences are outputted, giving a distance L between the both bars 10A, 10B. This output is applied to a comparator 50B, and according to the output thereof the revolution of the pulse motor 20B is controlled, allowing collision between both bars 10A, 10B to be prevented.

Description

[Detailed description of the invention] The present invention relates to a feed control device for conveyance equipment.

In a feed control device for a conveyance facility having a plurality of transfers, the following two methods are conventionally known in order to prevent adjacent transfers from colliding with each other during movement. In other words, the first method is to divide the storage devices into rows between one transfer and the other adjacent transfer, provide a predetermined distance between both transfers, and connect both transfers to seven units. There is a way to prevent them from coming into contact with each other, even if they are in different positions.

The second method is to move only one of the 62 adjacent transfers at the same time. For example, when the front transformer 1 moves forward, the front transformer 7 first moves forward.
Only after the door member moves forward and its forward movement is completed, the rear transfer moves forward, and if the front transfer fin moves backward 3E, the rear transfer moves backward. Only after this is completed will the front transfer begin to move backwards.

However, the first conventional method has problems in that it increases the cost of equipment such as storage devices and requires a large space. In addition, in the second conventional method, it takes several seconds for one of the transfers 1 to reach the forward limit or for the time to reach the backward eye, and the other transfer? During this period, the equipment must be stopped, which increases the cycle time of the equipment, which is extremely disadvantageous for high-speed operation.

Therefore, the present invention keeps equipment costs and space low, and
In order to reduce the cycle time of the equipment, the number of following transfers is adjusted in proportion to the distance between one transfer and the adjacent transfer I. The purpose was to control the speed of the

The present invention will be described in detail below based on embodiments shown in the accompanying drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention. This embodiment will be explained by taking as an example a transport facility having two adjacent transfers. Broadly speaking, the transport equipment includes a leading side device A, a following side device B, and a transfer bar mllli detection circuit C. The leading side device A and the following side device 1B each have a transfer bar 10A.
, 10B. Here, the leading device refers to a device that has a transfer bar located on the front side in the direction of movement when two transfer bars are moving, and the following device refers to a device that has a transfer bar located on the rear side in the above case. This refers to equipment that has a transfer bar. On the other hand, since the transfer bars 10A and 10B make a tt backward movement, if the bars 10A and 10B move to the left, 8 becomes a follower device and B becomes a leading device. In the following explanation, the case of the state shown in FIG. 1 will be described. In addition, the parts in the leading device 1rA are numbered with A at the end of their numbers, and the parts I in the following device B are numbered with B&: l' at the end of their numbers.
It is l.

In addition, the transfer bar spacing detection circuit C is, in principle,
The output voltage corresponds to the distance between the transformer bars 10A and 10B. However, the output voltage of A is the distance *
When L is greater than or equal to the specified value, it is OV, and when the distance is less than a predetermined value, the smaller the distance, the higher the output voltage.

If the output of the detection circuit C is large, the smaller the distance, the slower the speed of the bar 108 of the follow-up device B becomes.

Next, the embodiment shown in FIG. 1 will be explained in more detail. Pulse 7-
Y2OB is connected to the bar 10 via the reducer 21B, torque limiter 22B1 pinion gear 23B, and rack gear 24B.
8 is moved.

The pulse generator 30B generates a number of pulses proportional to the number of rotations of the pulse motor 20B. The speed setting 140B is for setting the speed of the transfer bar 10B using a variable resistor or the like, and is for outputting a voltage corresponding to the speed.

The acceleration/deceleration adjustment circuit 41B is a circuit that smoothly changes the speed of the bar 108 from speed O to a predetermined speed or from the predetermined speed to speed O. Comparison 150B receives the output signal of circuit 41B at the terminal, and connects the detection port/path C.
One terminal receives the output signal of motor I1g! Jinkou Road 51
It sends an output signal to B. As a result of the above, the following side 1
11B is constructed, and the preceding steel fittings HA is also constructed from members similar to this.

The transfer bar spacing detection circuit C includes a switch 61.6.
2 reversible counter 60. The D/AI conversion circuit 63 has an i[pressure calculation circuit 64. Behind this, the reversible counter 60 is
Halsge generator 30A via switch 61.62
, 30B, the pulse from the leading side pulse generator 30A is added to the up hand force, and the pulse from the following side pulse generator 30B is added to the down force.

As a result, the reversible counter 60 outputs an output in proportion to the distance ML.

The D/A conversion circuit 63 converts a digital value into a 37/11 value. The voltage operator circuit 64 generates a more impressive output voltage as the D/Am power circuit 3 is smaller.
When the output of the D/A conversion circuit 63 exceeds a predetermined value, the output voltage becomes Ov.

The switch 70 connects the output of the detection circuit C to the comparison 15 on the tracking side.
Switches 61, 62, and 7041 are connected to one terminal of 0B in conjunction with members not shown. Shinawachi Sui y Chiro 1,6
2.70&! 1lffl(F) J knee) if E3 is the follower side, it is connected as shown in the same figure, and conversely, if B becomes the lead side device and A is the follower side device), then
The connection is the opposite of that shown in the figure.

The operation of the above embodiment will be explained in detail. In the state shown in Fig. 1, if the distance 1- is small, manually
The difference between the two becomes smaller, the output of the reversible counter 60 becomes smaller, and E11[! When the output of the circuit 64 increases, the feedback voltage applied to one terminal of the comparator 50B increases, and the input voltage to the drive circuit 5113 decreases. Therefore, the rotational speed of the pulser 2OB is slow(), which prevents the bar 1013 from colliding with the bar 1OA.
°I can.

On the other hand, when the distance 1- is large, the feedback voltage is small or low, so that the rotational speed of the pulse motor 20B becomes slightly slower or does not change.

However, in this case, the distance is sufficiently large that the bar 10
B. IOA collision is unlikely to occur, bar 1. OB,
Since 10A moves together, the cycle time of the equipment can be shortened.

Next, when the leading side and the following side are connected, the switches 61, 62, 70 are set at the end J'61B, 6
It switches to 2A and 70Δ, and performs the same operation as above.

Figure 2 shows the distance between bars 1'OA and 1013 [- to t]
Characteristic diagram (with,
FIG. 3 shows the input voltage 1t of the follow-up side driving circuit 51B with respect to the distance between the bars 10Δ and 108.
This is a sex diagram.

Motor drive circuits 51A and 5.1B
A system using a control circuit, a gate circuit, and a thyristor may be used.

In addition, as shown in FIG. 4, comparators 50A and 50B having one terminal in addition to these terminals are used, and one of these terminals is connected to each halogen generator at a frequency of 5.・By installing the voltage conversion circuits 80A and 80B, in addition to changing the slope of the characteristic curve as shown in FIG.
OA to crotch () (a certain target 1 generator (U4' shown)
It is possible to prevent a trial run of the Herans Faber 10B or IOA in the event of a failure.

As mentioned above, the present invention has multiple transfers? In the conveyance equipment for h, we decided to control the speed of the following transf j in proportion to the distance between the other transnon 7 adjacent to the -75 transfer. It is possible to reduce the size and shorten the cycle time of equipment.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing one embodiment of the present invention, Fig. 2 is a characteristic diagram showing the input voltage on one side of the comparator versus the distance between two transfer bars, and Fig. 3 is a 2° FIG. 4 is a characteristic diagram showing the input voltage of the follow-up side t-drive circuit with respect to the distance between the transfer bars. FIG. 4 is a schematic diagram showing another embodiment of the present invention. Δ... Leading side device, B... Following side device, C... 1
~Lance Shifter Interval Detection Circuit, 10A, 10B...
・Transfudoper 12OA, 20B...Pulse generator as driving means -9, 30△, 30B...Pulse generator as one stage of measurement, 40B, 40△...62
Speed setter as constant f stage, 50A, 50[3... comparator. 60... Reversible h-lanter, 64... Voltage conversion circuit. Patent Applicant] "Shield, Automatic Chubu Stock" (Company Figure 1/E3 fA Figure 2 Figure 3

Claims (1)

[Claims] In a conveyance facility equipped with a plurality of transfer bars driven by separate drive means in a line and a setting means that can set the drive speed of each drive means to a desired value, the transfer bar follows the preceding transfer bar. The conveying equipment is characterized in that it measures the distance between the transfer bar and the transfer bar, and when the distance becomes smaller than a predetermined value, it sends a signal to the setting means of the following transfer bar to reduce the driving speed. Speed control wholesale method.