JPS5820894Y2 - Only machines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a platform on which a hopper having a discharge mechanism is mounted.

Conventional weighing machines commonly used during the transportation process of raw materials in manufacturing plants include peltweighers, hopper scales, and load cell scales, and their weighing accuracy is within ±
It is in the range of 1/200 to ±1/1200.

However, when raw materials are intermittently supplied in fixed quantities to the next process during the manufacturing process, for example, weighing accuracy ± 1/2
000 may be requested.

In such a case, it is of course impossible to obtain high weighing accuracy using the above-mentioned type of weighing machine.

Therefore, in the past, intermediate products were taken out into a designated container during the manufacturing process, transported by crane, and manually adjusted the amount of excess or deficiency while looking at the weighing scale on the stand, and then transported by crane again to the next hopper. They were also making investments.

Needless to say, such a method is inefficient and also poses a problem from an occupational safety and health perspective as it generates dust.

In order to solve the above-mentioned problems, the present invention has developed a system in which the contents put into the hopper by any means can be weighed with high weighing accuracy and then discharged by gravity through holes drilled in the hopper. We aim to provide the following.

An embodiment of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a plan view of the platform of the present invention, Fig. 2 is a side view of the platform, Fig. 3 is a schematic diagram of the measuring section, and Fig. 4 is a partial cross-sectional schematic diagram showing an embodiment of the invention. It is.

A hopper 3 having a specified capacity and an inverted conical lower part having legs of a required height is fixed near the four corners of the weighing platform 2 of the weighing platform 1, and a rotary valve 4 is provided at the bottom of the hopper 3. There is.

The flexible pipe 5 attached to the rotary valve 4 has a through hole 6 that is bored into the weighing platform 2 so as not to hinder measurement, and which is slightly larger than the external dimension of the flexible pipe 5.
is connected to the conveyor 7 by passing through the weighing platform 2 and below it.

In addition, in the weighing part 8 of the platform 1, there is a limit switch 1 disposed below the weight 11 of the balance 10 supported by the blade holder 9.
2 is a provision.

13 is a zero point adjustment weight. The through hole 6 only needs to be provided in the weighing platform if there is no obstacle for the contents of the hopper to fall below the weighing platform.

Next, to explain the operation of the present invention, the weighing scale on the weighing platform is adjusted to zero so that the weight becomes zero when the hopper 3, rotary valve 4, flexible pipe 5, etc. are placed on the weighing platform. .

Therefore, when raw materials are fed into the hopper 3 by a supply conveyor (not shown) and a desired weight is weighed by the platform 1, the large frame 10 is tilted upward on the weight 11 side, and a limit switch is provided at the bottom of the other end. 12, the supply conveyor is stopped by an external signal, and then the rotary valve 4 is rotated to discharge the hopper contents and supply them to the flow conveyor 7 via the flexible pipe 5.

Therefore, when the contents of the hopper begin to be discharged by the rotary valve 4, the balance 10 immediately returns to the horizontal position and the limit switch 12 is opened. The feed conveyor is operated again and the raw material is transferred to hopper 3.
will be put into the

By repeating the above steps, quantitative weighing of the raw materials is performed repeatedly intermittently.

In the embodiment, a flexible pipe 5 was used to discharge the contents from the rotary valve 4, but if there is a receiving facility immediately below the platform 1, or if the contents do not generate dust, a flexible pipe may be used. 5 may not be provided.

Alternatively, it may have a double-tube structure in which the inner tube can move up and down.

By using two or more devices of the present invention in parallel, it is also possible to mix two or more types with high weighing accuracy.

Since the present invention is constructed as described above, it is possible to perform weighing with a higher weighing accuracy than before during the manufacturing process, and at the same time, the effects of labor saving and environmental improvement are significant.

In addition, compared to a hopper scale or a method in which the popper is placed on a stand and the contents are discharged to the side, the overall height of the device of this invention can be lowered, so the installation space is small and the structure is simple. We can provide a highly reliable product that is inexpensive, does not hang on shelves, does not get clogged, etc.

[Brief explanation of the drawing]

Figure 1 is a plan view of the scale of the present invention, Figure 2 is a side view of the scale, Figure 3 is a schematic diagram of the weighing section, and Figure 4 is a schematic diagram of the weighing section.
The figure is a schematic partial cross-sectional view showing an embodiment of the present invention. １・・・・・・All the units, ２．・・・Weighing platform, ３．
...Hopper, 4...Rotary valve, 6...Through hole, 8...Measuring part, 12
······Limit switch.

Claims (1)

[Scope of utility model registration request] A hopper having a rotary valve at the bottom thereof is placed on a weighing platform that is almost a platform, a through hole is provided in the weighing platform directly below the rotary valve, and the rotary valve and the lower part of the weighing platform are vertically connected through the through hole. Most of the machines are equipped with an ejection pipe that connects to the machine.