JPS5910001Y2 - Safety device for measuring bagging equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that uses an elevator or the like to accurately measure and bag grain stored in a supply tank, and in particular, it senses the movement of the scale rod of a platform scale to bag grains. The present invention relates to an improvement in a shutter control device that opens and closes a supply port to a tank.

Conventionally, there has been a weighing bagging device that is linked to the scale rod of a platform scale, and in both cases, the scale rod begins to rise as the grain gradually enters the bag due to the movement of the scale rod.
A switch that senses this movement and turns on activates the solenoid circuit to half-open the shirt door.Then, the scale rod further rises to detect a balanced position with a predetermined weight, and the solenoid circuit is turned OFF, causing the shirt door to open half-open. Some of them fell under their own weight and became completely closed.

However, when trying to take down the full grain bag from the scale in this state, the switch turns on again.
As a result, the solenoid is activated.

In other words, since the balance of the scale rod is unstable, the solenoid is activated every time the scale rod moves up and down, causing chattering, which can cause various problems with the solenoid and control circuit, and cause discomfort to the operator. This causes customers to feel uneasy as if there is something wrong with the device itself, which causes the device to lose its reliability.

Therefore, the present invention has a structure in which the solenoid circuit is cut off when a predetermined amount is finally filled in the bag and the shirt cap is closed. This prevents solenoid chattering, which causes discomfort and shortens the life of the control system, and prevents the device itself from chattering. To provide an energy-saving measuring device that increases the durability and reliability of a meter and does not consume unnecessary power.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a grain lifting machine 1, a supply tank 2, and a shirt rack 3 attached to the mouth 2a of the supply tank have a manual lever 3a, and an engaging portion 4 is provided on the outer wall 3b of the circular arc portion of the shirt rack 3. It is provided.

The inside of the cover 6 attached below the control unit 5 is
As shown in the figure, there is a solenoid 7 and a retaining pin 8 that protrudes sideways.
The solenoid 7 connected to a shaft 9 having a
It is always urged in the protruding direction by a spring 10.

The engaging portion 4 includes a fully open locking piece 4a, a half open locking piece 4b, a safety switch operating lever 4C, and a stopper 4d.

When the shirt shirt is fully opened, the full opening locking piece 4a engages on the shaft 9 and is held as shown in FIG.

Returning to FIG. 1, a motor 11 is attached to the grain lifting machine 1 and serves as a driving source for lifting grain into a supply tank.

A platform scale 12 is installed and fixed at a lower position of the supply tank 2 on the side of the motor.

The platform scale 12 uses a ball holder 12 to hold the object placed on the plaque 12a.
It is an ordinary platform scale that measures by placing a quantitative weight on the b and sliding a fine adjustment weight attached to a scale rod.

FIG. 3 is a diagram with the solenoid 7 removed, and the safety switch 14 implementing the present invention is attached to the cover 6. FIG. b is a diagram when the safety switch 14 is activated.

FIG. 4 is a circuit diagram of the entire device, in which a main switch 16 connected to one end of a power supply 15 connects one end of each of the solenoid 7, the coil 18a of the relay 18, and the grain lifting machine motor 11 via a fuse 17. The other end of the solenoid 7 is connected to the power supply via the make contact 18b of the relay 18, and the other end of the coil of the relay 18 is connected to the safety switch 1.
4, the scale rod balance detection switch 19 and the scale rod rise detection switch 20 through a series circuit to the other end of the power supply 15, and the other end of the motor 11 is connected to the fuse 21.
and a motor switch 22 connected to the other end of the power supply through a series circuit.

23 and 24 are power source and motor pilot lamps.

With the above structure, when the main switch 16 is turned on and the motor switch 22 is also turned on, the motor 11 is driven,
A grain lifting machine 1 stores grain in a supply tank 2.

In this state, the grain storage bag 1 is placed on the plaque 12a of the platform scale 12.
3 and adjust the weight by placing a weight corresponding to a predetermined storage capacity on the ball holder, and then setting the shirt shirt 3 using the manual lever 3a.

The circuit configuration at this time is shown in Figure 4.

The grain in the supply tank 2 passes through the supply tank 2a and enters the storage bag 13, and when it approaches the storage capacity, the scale rod of the platform scale starts to move.At this time, the scale rod rise detection switch 20 (not shown) is activated. Since it turns on, power supply 15 → main switch 16 → fuse 17 → coil 18 of relay 18
a → Safety switch 14 → Scale rod balance detection switch 19 → Scale rod rise detection switch 20 → Since the closed circuit of the power supply 15 is established, the closing contact 18 of the relay 18
b is turned on, the solenoid 7 is energized, the shaft is retracted against the spring 10, the engagement pin 8 and the half-open locking piece 4b are engaged, the shirt starter is locked in the half-open position, and the flow of grain is reduced. .

When the predetermined amount is reached, the scale pole balances, so the scale pole balance detection switch 19 that detects this state is turned OFF.
Becomes FF.

Therefore, in the closed circuit described above, the scale rod balance detection switch 19 is turned OFF, so the solenoid 7, which had been energized up to that point, is turned OFF and is caused by the spring 10 to protrude to the left in FIG.
and the half-open locking piece 4b is disengaged.

Therefore, the shirt shutter 3 rotates under its own weight and closes the supply port.

At the same time, in the present invention, the safety switch 14 is turned OFF by the operating lever 4C as shown in FIG. 3b.

Therefore, it is possible to completely prevent solenoid chattering due to vibration, bag movement, etc. in the conventionally unstable scale rod balance position, and the customer's anxiety can be completely eliminated.

Furthermore, since the power is turned off until the next set state is reached, it is possible to provide an energy-saving measuring device that does not waste power.

In addition, the present invention can significantly extend the life of control parts including solenoids.

Note that the relay 18 can be omitted depending on the capacity of the detection switch, etc., and if a 2-pole single-throw switch 14' is used as a safety switch as shown in Figure 5 in place of the motor switch, the solenoid circuit is activated when the shutter is fully closed. Since the motor circuit is cut off at the same time as the cut-off, it is possible to further save power.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the metering type bagging device equipped with the safety device of the present invention, Fig. 2 is a partial enlarged view of Fig. 1 with a section of the cover taken in section, and Fig. 3 is the solenoid in Fig. 2. 4 is a diagram showing the operation of the safety switch with the safety switch removed; a is a relationship diagram when the safety switch is set; b is a relationship diagram when the safety switch is fully closed and the safety switch is OFF; FIG. 4 is a circuit diagram of the entire device. FIG. 5 is a circuit diagram of another embodiment. 1... Grain lifting machine, 2... Supply tank, 3
...Shutter, 4...Engagement part, 7...
...Solenoid, 8...Engagement pin, 9...
...shaft, 12... platform scale, 14.
... Safety switch, 19 ... Graduation rod balance detection switch, 20 ... Graduation rod rise detection switch.

Claims (1)

[Scope of utility model registration request] A supply tank that supplies grain transported by an elevator for bagging, a shirt flap that is openably and closably attached to the supply tank tank at the bottom of the supply tank and has a retaining portion, and engages with the retaining portion in stages. a platform scale; a first switch installed on the platform scale for detecting movement of the scale rod; and a first switch connected in series with the first switch for sensing the balance position of the scale pole. and a third switch connected in series with the first and second switches, the third switch being turned OFF when the shirt shirt is in a fully closed position. Safety device for filling equipment.