JPH0525700Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a powder feeding and measuring machine that can feed powder and granules and continuously measure the amount of powder fed.

(Prior art) Conventionally, the powder to be introduced is stored in a storage space of a rotating body, and by rotating the rotating body, the contained powder is rotated 180 degrees and transferred, and the powder is collected at a position opposite to the input side. The entire powder feeding device with a structure for discharging powder is simply supported on the line connecting the input port and the discharge port using support legs such as edges or bearings, and it is also prevented from falling toward the side of the line where the powder is filled. In addition, a powder feeding and measuring machine that is equipped with a load cell that measures the moment or supporting load and calculates the amount of powder from the load moment measured by the load cell is disclosed in Japanese Patent Publication No. 57-17247,
It is known from Japanese Patent Publication No. 51-24266.

(Problems to be Solved by the Invention) In this conventional powder feeding and measuring machine, measurement errors occur because the friction caused by the edges or bearings is not zero.
In addition, the edges were deformed due to creep, etc., and the deformation added a load to the load cell, increasing errors.

The problem of the present invention is to solve the above-mentioned drawbacks of the conventional method and provide an excellent powder feeding/weighing machine that has less measurement error, less shaking in the line direction, and has a rotating device and a high support load for powder. It's about doing.

(Means for Solving the Problems) The gist of the present invention that solves the problems is that the powder to be introduced is accommodated in the storage space of a rotating body, and by rotating the rotating body, the contained powder is °The entire powder feeding device, which rotates and transfers powder and discharges powder at a position opposite to the input side, is supported on the line connecting the input port and the discharge port, and the moment around the line is transferred from the same line. In a powder feeding and weighing machine that measures the weight of powder stored in a rotating body from the load measured by the load cell by supporting the load cell at an offset position, the entire powder feeding device is supported on the above line. This powder feeding and measuring machine is characterized in that it is supported by a plurality of thin strip plates that have high rigidity in the line direction and extremely low rigidity in the direction perpendicular to the line direction.

(Function) In this invention, the weight of the entire powder feeding device when no powder is loaded is mainly supported by the plurality of thin strip plates above the line. Normally, the entire powder feeding device is symmetrical on the left and right sides of the line, so it is suspended by a plurality of thin strip plates, so that not much load is applied to the load cell. If the feeder is not symmetrical in the line, the load cell will be heavily loaded.

Next, while operating the powder feeding device and rotating the rotary body, the powder is introduced into the rotary body from the input port, and the powder enters the storage space of the rotary body and is rotated and transferred, and then exits from the discharge port on the opposite side. It is discharged. When the powder is discharged, the rotating body further rotates 180° in an empty state, returns to its original position, and the powder is again accommodated, rotated, transferred, and discharged. By repeating this process, powder is continuously fed. On the other hand, the amount of powder fed is such that one half of the line is tilted from the line that has become heavy due to containing powder, and the load cell supports the rotational moment to keep it from falling over. By measuring the rotational moment and supporting load using this load cell, the total weight of the contained powder is calculated. At this time, the powder is uniformly accommodated in the accommodation space and the degree of adhesion of the powder to the rotating body is also determined in advance from experiments or is calculated hypothetically. In addition, since the entire powder feeding device is supported by multiple thin strip plates, the rigidity is extremely small against horizontal movement around the line, so there is almost no resistance moment, allowing free horizontal movement, and controlling the amount of powder fed. Measurement errors can be suppressed.

On the other hand, the movement of the entire powder feeding device in the line direction is blocked due to the high rigidity of the thin strip plate in the line direction, and the powder feeding device can be moved only by the multiple thin strip plates and the load cell without shaking in the line direction. can be held stably.

(Example) Examples will be described below based on the drawings.

The rotating body 1 of this embodiment is housed in a casing 2, driven by a motor 3, has radial blades 4 protruding from its outer periphery, and uses the space between the radial blades as a powder storage space 5. . In the figure, 6 is an input port, 7 is a discharge port, 8 is a powder input pipe, 9 and 10 are thin strip plates, 11 is a load cell, 12 and 13 are thin strip plate fixing fittings, and 14
is a line connecting the input port 6 and the discharge port 7.

In this embodiment, the powder is introduced through the powder input pipe 8, stored in the storage space 5 between the radial vanes 4, rotated, and dropped through the discharge port 7 formed by opening the bottom of the casing on the opposite side. is discharged. It is symmetrical with respect to the powder feeding and measuring machine line 14 of this embodiment, and when powder is not introduced, it is supported so as to be suspended only by a pair of thin strip plates 9 and 10, and the load on the load cell 11 is small. . Next, when powder is introduced, the entire powder feeding device 15 tilts to one side of the line,
A load is applied to the load cell 11, and from the measured load and the arm from the line 14 of the load cell 11, the moment around the line 14 due to the powder accommodated in the half accommodation space 5 of the rotating body 1 is calculated.
The amount of displacement (moment arm) of the powder load from the moment center line 14 is calculated in advance, assuming that the powder is uniformly accommodated in half of the accommodation space 5 of the rotating body 1. Next, assuming that the moment when the entire amount of powder contained in the rotating body 1 is loaded on this calculated moment arm is equal to the moment measured by the load cell 11, the actual powder weight is calculated. calculate. The supply amount is calculated by multiplying this powder weight value by twice the rotation speed of the rotating body 1.

Note that the method for calculating the powder supply amount is not limited to the above example. Another method is to find the relationship between the amount of powder fed when actually measured using the powder feeding measuring machine of the present invention, the value of the load cell 11, and the rotation speed of the rotating body 1, and then calculate the computer using the back calculation method from that data. It can also be used to calculate the supply amount.

(Effects of the invention) As described above, according to the invention, the powder feeding device is supported by a plurality of thin strip plates that have high rigidity in the line direction and extremely low rigidity in the direction perpendicular to the line direction. As a result, the line can be swung freely from side to side without any resistance, and errors due to support in moment and load calculations of the load cell can be suppressed as much as possible, increasing the accuracy of calculating the amount of powder to be fed. Furthermore, movement in the line direction is suppressed because the thin strip plate has high rigidity in that direction, allowing stable measurement of the powder supply amount.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view taken along line A--A in FIG. 1. 1...Rotating body, 4...Radiation vane, 5...Accommodation space, 6...Input port, 7...Discharge port, 9, 10...
Thin strip plate, 11...load cell, 14...line.

Claims (1)

[Scope of utility model registration request] The powder to be introduced is stored in the storage space of the rotating body,
By rotating the rotary body, the contained powder can be rotated 180°.
The entire powder feeding device, which rotates and transfers powder and discharges powder at a position opposite to the input side, is supported on the line connecting the input port and the discharge port, and the moment around the line is deflected from the line. In a powder feeding/weighing machine that measures the weight of powder stored in a rotating body based on the load measured by the load cell, the entire powder feeding device is supported on the above-mentioned line. A powder feeding and measuring machine characterized in that it is supported by a plurality of thin strip plates that have high rigidity in the line direction and extremely low rigidity in the direction perpendicular to the line direction.