JPH0356413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric control circuit for a weighing and bagging device for granular materials, which can be switched between a state where it is used only for weight measurement and a state where it is used as a weighing and bagging device with a simple operation. It was designed so that

In general, in weighing and bagging equipment for granular materials, the scale and the hopper discharge control device operate integrally, so even if you try to measure weight using only the scale, the discharge control device may be activated and particulate matter may be discharged from the hopper. In order to avoid such inconveniences, it is conceivable to enable the emission control device to be used as a metering device without being activated.

For this purpose, the present invention is constructed as follows.
That is, the control circuit 4 that controls the amount of granules discharged from the hopper 3 is connected in parallel to the weighing circuit 2 that displays the weight on the scale 1, and first, the power switch 5 is turned on.
By turning ON, the metering circuit 2 becomes conductive, and then by turning on any switch in the control system switch group 8, such as the set value change switch 6 or the set value confirmation switch 7, the control circuit 4 becomes conductive. It was configured as follows.

The present invention achieves the following technical effects through the above configuration. In other words, turn on power switch 5
Then, only the weighing circuit 2 becomes conductive and can be used as a weighing device. When used as a weighing and bagging device, by turning on the power switch 5 and then turning on any switch in the control system switch group 8, the measuring circuit 2 and the control circuit 4 are brought into continuity and can be used. Become. In this way, any switch in the control system switch group 8 serves as a switch for making the control circuit 4 conductive, so there is no need to provide a dedicated switch, simplifying the structure and improving operability.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific configuration of the present invention will be described below based on 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 9 are lifted into the granule sorting mechanism 1.
The large particles are sorted by 0 in tank 3.
sent to. In the tank 3, a shutter 13 at an outlet 12 thereof is opened and closed by operating a solenoid 11, and a predetermined amount of sized grain is supplied into a tare bag 14. Reference numeral 1 is a measuring instrument, and 15 is a display panel provided with a display section and switches for displaying signals from the measuring instrument. M is a motor that drives the grain sorting mechanism 10.

The electrical control relationship in this example is as follows:
The circuit is configured as shown in FIG. The configuration and operation mode of this circuit are as follows.

Reference numeral 16 indicates a power cutoff push button switch which is normally closed, and 5 indicates an automatic return type power supply push button switch which is normally open. When this power push button switch 5 is turned on, contacts R1-a1 and R1-a2 of relay R1
are both closed, and the contacts R1-a1 form a self-holding circuit. Further, by closing the contact R1-a2, the measuring circuit 2 becomes conductive, and the measuring instrument 1 and the display section of the display panel 15 start operating. If an object to be weighed is placed on the scale 1 in this state, its weight will be displayed on the display section of the display panel 15.

The display panel 15 shows, for example, by turning on the
Set value change switch 6, which changes the amount to 30Kg bag or 60Kg bag, and increase switch 17, which increases the set value in steps of, for example, 100g by turning on, and vice versa.
For example, a control system switch group 8 is installed in parallel, including a reduction switch 18 that reduces the set value every 100 g, and a set value confirmation switch 7 that displays the set value on the display when turned on. . The circuits of these switches 6, 17, 18, and 7 are connected in parallel, and when one or more switches are turned on, the contact R of relay R2 is turned on.
2-a1 and R2-a2 are both closed, contact R
2-a1 forms a self-holding circuit. Further, by closing the contact R2-a2, the control circuit 4 becomes conductive and the solenoid 11 starts operating. In this state, when the shutter 13 of the tank 3 is opened and granules are supplied to the tare 14 on the scale 1, when the supply amount reaches a predetermined set weight value, the solenoid 11 is activated and the shutter 13 closes the discharge port 12. to stop the supply of granules.

Reference numeral 19 denotes a push button switch for stopping the motor M, which is normally closed; and 20, an automatic return type push button switch for driving the motor M, which is normally closed. When this push button switch 20 for driving motor M is turned on, relay R
Contacts R3-a1 and R3-a2 of No. 3 are both closed, and contact R3-a1 forms a self-holding circuit.
In this state, the motor M is driven, and while sorting the grains supplied from the input hopper 9, the grains are lifted into the tank 3, the shutter 13 of the tank 3 is opened, and the tare bag 1 is loaded.
When the amount of granules supplied into the container 4 reaches a predetermined value, the solenoid 11 operates to close the outlet 12 with the shutter 13, thereby completing the bagging operation.

In the above embodiment, the conduction state between the metering circuit 2 and the control circuit 4 is controlled using the relays R1 and R2, but it is also possible to use an appropriate control means such as a non-contact circuit.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a control-related electrical circuit diagram. 1...Measuring instrument, 2...Measuring circuit, 3...Hopper, 4...Control circuit, 5...Power switch, 6...
...Setting value change switch, 7...Setting value confirmation switch, 8...Control system switch group.

Claims (1)

[Claims] 1. A control circuit that controls the amount of granules discharged from the hopper is connected in parallel to the weighing circuit that displays the weight on the scale. First, the weighing circuit is turned on by turning on the power switch, and then the set value is A control circuit for a weighing and bagging device in which the control circuit can be made conductive by turning on any switch in a group of control system switches, such as a change switch or a set value confirmation switch.