JPS6340721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric control circuit for a weighing and bagging device that takes out and bags a desired weight of granular material from a hopper that stores granular material supplied by a feeding mechanism. This allows for accurate bagging by weight.

When weighing granular materials and packaging them in bags, the amount may be increased or decreased relative to the standard weight depending on the dryness of the granular materials. Increases or decreases from this standard weight are set by the operator at the start of weighing, but if the weighing and bagging equipment is turned off for a break during work, or due to an unexpected power outage, When the amount expires, the above-mentioned increase or decrease settings are lost. Therefore, when restarting work, it is necessary to set the amount to increase or decrease again, but this resetting may be forgotten.

This invention solves the above-mentioned disadvantages,
It was constructed as follows. That is, a shutter 3 for opening and closing the outlet 2 is provided at the outlet 2 of the hopper 1 that stores granular materials, and the shutter 3 is operated appropriately to take out a desired weight of granules from the hopper 1 and bag them. In the weighing and bagging device, a measuring circuit 5 of a measuring device 4 and a control circuit 6 for operating the shutter 3 are connected to each other by a conductive operation of a set value confirmation switch 8 for displaying a supply amount set value of the control circuit 6 on a display 7. Interlockingly, a drive motor M of a supply mechanism 9 for supplying granules to the hopper 1 is connected so as to be actuable.

The present invention achieves the following technical effects through the above configuration. That is, in order to operate this weighing and bagging device, the set value confirmation switch 8 must be turned on, and at this time, the supply amount control value, that is, the bagging weight displayed on the display 7 is checked. However, if the weight is different from the desired bagging weight, the weight should be changed as appropriate. Therefore, even when resuming work after a break or a power outage, the operator does not forget to check the bagging weight, and the desired weight can be accurately packed.

The specific configuration of the present invention will be explained below with reference to embodiments shown in the drawings.

The weighing and bagging apparatus in this embodiment is a vertical granule sorter, as shown in FIG. To explain the general operating state of this vertical granule sorter, the granules inputted from the input hopper 10 are sorted by the lifting granule sorting mechanism which is the supply mechanism 9, and the large-diameter sized particles are transferred to the hopper. sent to 1. In the hopper 1, a solenoid 11 is operated to control the opening and closing of a shutter 3 provided at the outlet 2 of the hopper 1, and supply sorted grains to a set weight into a tare bag 12.

4 is a scale, 7 is a display that digitally displays the weight signal from the scale 4, and M is the above-mentioned lifted grain sorting mechanism 9.
This is the motor that drives the.

The electrical control relationship in this example is as follows:
The circuit is constructed as shown in FIG. 2 or 3. Next, the configuration and operation mode of this circuit will be explained.

First, FIG. 2 will be explained.

Reference numeral 13 is a power cutoff push button switch which is normally closed, and 14 is an automatic return type power supply push button switch which is normally open. When this power push button switch 14 is turned on, contacts R1-a1 and R1-a of relay R1 are turned on.
2 are both closed, and the contacts R1-a1 form a self-holding circuit. Further, by closing the contact R1-a2, the measuring circuit 5 becomes conductive, and the measuring device 4 and the display 7 start operating. In this state, the scale 4
When an object to be weighed is placed on top, its weight is displayed on the display 7.

15 is a set value change switch, for example, by turning on this switch, it is possible to change the setting value to 30Kg and 60Kg.
Reference numeral 16 denotes a quantity increase switch, and by turning this on, for example, the set value can be increased in increments of 100 g. 1
Reference numeral 7 is a weight loss switch, and by turning it on, for example, the weight can be reduced by a set value in 100g increments.

These set value change switch 15, increase switch 16, and decrease switch 17 are connected in parallel in terms of circuit, and when one or more switches are turned on, contact R2 of relay R2 is turned on.
-a1 and R2-a2 are both closed, contact R2-
a1 forms a self-holding circuit. In addition, contact R2
-a2 is closed, the control circuit 6 becomes conductive, and the solenoid 11 starts operating. In this state, open the shutter 3 of the hopper 1 and
When grains are supplied to the upper tare bag 12, when the grain weight in the tare bag 2 reaches the desired set value, the solenoid 11
is activated, the shutter 3 closes the outlet 2 and stops the supply.

Reference numeral 8 denotes a set value confirmation switch, which when turned on displays the supply amount control value set by the set value change switch 15, increase switch 16, and decrease switch 17 on the display 7, and contacts R of relay R3.
3-a1 and R3-a2 are both closed, contact R
3-a1 forms a self-holding circuit. Also, R3
By closing -a2, conduction to the motor M becomes possible.

Reference numeral 18 indicates a push button switch for stopping the motor M, which is normally closed, and reference numeral 19 indicates an automatic return type push button switch for driving the motor, which is normally open. When this motor drive push button switch 19 is turned on, both contacts R4-a1 and R4-a2 of relay R4 are closed, contact R4-a1 forms a self-holding circuit, and contact R4-a1 is closed.
A2 becomes conductive to drive motor M.

The circuit in FIG. 3 is almost the same as the circuit in FIG. 2, but the difference is that by turning on the set value confirmation switch 8, the contacts
a3 is closed, the control circuit 6 becomes conductive, and the motor M can be started. The set value change switch, increase switch, switches, etc. are controlled by the control circuit 6.
It is incorporated inside.

When the motor M is driven, the input hopper 10
The sorted grains are continuously supplied to the hopper 1 while the grains supplied to the hopper are sorted by a lifting and sorting mechanism 9.

In the above embodiment, the circuit is configured using a plurality of relays, but it is also possible to change it to an appropriate implementation means, such as implementing it with a non-contact circuit.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a control-related electrical circuit diagram, and FIG. 3 is an electrical circuit diagram showing another embodiment. 1... hopper, 2... outlet, 3... shutter, 4... measuring instrument, 5... measuring circuit, 6... control circuit, 7... display, 8... set value confirmation switch, 9... ...Feeding mechanism, M...Drive motor.

Claims (1)

[Claims] 1 At the outlet 2 of the hopper 1 that stores granular materials,
In the weighing and bagging apparatus, a shutter 3 for opening and closing the outlet 2 is provided, and the shutter 3 is operated appropriately to take out granules of a desired weight from the hopper 1 and bag them. A supply mechanism 9 that supplies granules to the hopper 1 in conjunction with the conduction operation of a set value confirmation switch 8 that displays the supply amount setting value of the control circuit 6 on the display 7 between the control circuit 6 that operates the shutter 3 and the control circuit 6 that operates the shutter 3. A control circuit for a weighing and bagging device comprising driving motors M connected to each other so as to be startable.