JPS5820893Y2 - Dosing device for automatic quantitative scales - Google Patents

Description

[Detailed description of the invention] In this invention, a rough charging hopper 2 and a precision charging hopper 3 are provided at the lower part of the upper hopper 1, the upper hopper 1 and the above-mentioned double-throwing hole hoppers 2 and 3 are partitioned by a partition wall 4, and the double-throwing hole hopper Input chutes 5 and 6 are provided at the lower part of the coarse input hopper 2, a large quantity input port 39 is formed at the lower part of the coarse input hopper 2, and opening/closing gates 7 and 8 are provided in both chutes 5 and 6, respectively. This invention relates to a dosing device for an automatic metering scale, which is formed for volumetric input and has a precision dosing chute 6 formed for minute amount dosing.

The coarse input hopper 2 is provided with a volume and bulk input sliding adjustment plate 9, and input adjustment plates 10, 11 are provided on the sides of both hole-throwing chutes 5, 6.

Object guide plates 12 and 13 are provided on both sides of the upper end of the partition wall 4.

In the figure, 14 indicates the input port for the object to be weighed, 15.16 indicates the cylinder for operating the opening/closing gate 7.8, 17.18 indicates the support rod for the control plate for the input port, and 19.20 indicates the elevation of the control plate 17.18. Adjustment bolt, 21.22 is the pivot of opening/closing gate 7.8,
Reference numeral 23 indicates a sliding support guide for the volume and large amount input sliding adjustment plate 9, 24 indicates an adjustment plate tightening bolt, 25 indicates an elevation guide wall for the guide 23, 26 indicates a guide wall tightening bolt, and 27 indicates a tightening bolt hole. , 28 is a weighing hopper supported by a balance 29 directly below the input chutes 5 and 6, 30 is an opening/closing gate thereof, 31 is a fulcrum of the balance 29, 32 is a weight, 33 is a bulk switch,
34 is a metering switch, 35 is a stopper, 36 is an electric control panel, and 37 is an air control panel.

Therefore, the object to be weighed 38 inputted into the upper hopper 1 from the input port 14 is distributed to both sides of the partition wall 4, filling the precision input hopper 3 and the chute 6, as shown in FIG. The rough input chute 5 is filled with volume from the opening 39.

In this state, when the gate 7.8 is opened, the volume in the chute 5 (e.g., 80% volume of the quantitative volume) is charged into the weighing hopper 28 at once, and then a large quantity is charged from the large quantity input port 39. .

During this time, a small amount of liquid is being fed from the precision feeding chute 6 (see Fig. 2).

When, for example, 95% of the fixed amount is added, the large amount switch 33 is turned on, operates the cylinder 15, closes the gate 7, and ends the large amount injection, but continues the small amount injection (this state is changed to the third (shown in figure).

By adding this small amount, the amount to be weighed in the weighing hopper 28 becomes a fixed amount, and the metering switch 34 closes, causing the cylinder 16 to be weighed.
is operated, the gate 8 is closed, and the gate 30 of the weighing hopper 28 is opened and closed to instantly drop the object to be weighed.

As shown in FIG. 1, the initial charging chute 5 is filled with volume and the coarse charging hopper 2 is also filled in a steady state, so that the same operation as described above can be repeated.

Conventionally, as shown in Japanese Unexamined Patent Publication No. 47-13981, the same feeding device has been used to perform coarse feeding, that is, volumetric feeding, and bulk feeding (
Since we performed large amount injection and small amount injection) and precision injection (micro amount injection), the filling operation of the volume and large amount was performed when adding a small amount, so the flow rate density of the small amount injection changed due to the influence of that operation. It is difficult to inject the same small amount each time, making it impossible to obtain a stable quantitative example, which not only causes variations, but also wastes a meaningless amount of time after the micro amount is added until the volume and large amount are filled and a steady state is achieved. However, there was a drawback that the metering speed could not be improved.

Since this project is configured as described above, preparations for the next volumetric and large quantity dosing are completed during the micro-dosing and metering operations after the large quantity dosing, and the next coarse dosing (volume and large quantity dosing) is completed promptly. Not only can the operation be started to improve the metering speed, but also the volume dosing, large amount dosing, and small amount dosing are done separately, so when adding a small amount, there is no influence of the filling operation for volume and large amount dosing, and the amount of Since the charging is carried out from one side of the partition wall 4 of the upper hopper 1 through the precision charging hopper 3 and the precision charging chute 6, there is little variation in the flow rate density of small amounts of charging, which has the practical benefit of improving metering accuracy.

[Brief explanation of the drawing]

Figure 1 is a side view showing the charging device in the automatic metering scale of the present invention, Figure 2 is a side view showing the volume and large quantity loading state;
Figure 3 is a side view of a small amount added state, Figure 4 is a partially enlarged side view of Figure 1, Figure 5 is a partially detailed view of Figure 4, and Figure 6 is a partially enlarged view of Figure 4. It is. 1...Upper hopper, 2...Rough charging hopper, 3...Precision charging hopper, 4...
・・Bulkhead, 5, 6・・・・Insertion shoe), 7.8・
...Opening/closing gate, 39...Multi-volume inlet.

Claims (1)

[Scope of utility model registration request] A coarse charging hopper 2 and a precision charging hopper 3 are provided at the bottom of the upper hopper 1, the upper hopper 1 and the above-mentioned two-hole hoppers 2 and 3 are partitioned by a partition wall 4, and a charging chute is provided at the bottom of both the two-hole hoppers 2 and 3, respectively. 5.6, a bulk input port 39 is formed at the bottom of the coarse input hopper 2, opening/closing gates 7.8 are provided in both chutes 5 and 6, and the coarse input chute 5 is formed for volumetric input, A dosing device for an automatic quantitative scale in which a dosing chute 6 is formed for small amount dosing.