JP2007022761A - Granule weigher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To process the large amount of granules for a short time by increasing a ratio of an opening through which the granules pass. <P>SOLUTION: In this granule weigher, for input to or discharge from a tare, a plurality of door-like rotating blades 62 are provided in a gate portion, and granules are weighed. By controlling an air gap when the rotating blades 62 close a passage, the granule weigher can handle granules of various granulation sizes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to mass measurement of granules such as rice, red beans and soybeans.

  In the operation of the tare input part of the particle measuring instrument, with the conventional lattice-like gate, when the gate is closed, the opening made by the fixed lattice and the movable lattice is narrowed and the particles are caught and crushed. Occurs. In order to avoid this, a gap that allows the particles to enter is provided without sliding the fixed grating and the movable grating directly. The voids must be set wide or narrow depending on the particle size of the granules to be handled. Since this setting is different from the opening of the gate, a separate drive mechanism is required.

In the conventional lattice structure, the gate is opened and closed by moving the movable lattice over the fixed lattice. However, in this structure, the opening area is the lattice size because both lattices overlap in the same phase even in the fully open state. Due to the presence of, it cannot exceed 50%.

However, in the present invention, when the rotating rotor blades are in a positional relationship such that they close each other, the particles are caught when the edges of the rotor blades face each other with a small gap, but they rotate before that. If it is stopped, biting does not occur. If the position to be stopped before this is controlled by the particle size of the granules, the stop position may be determined accordingly for the particles having different particle sizes, so that the purpose can be achieved only by the drive mechanism for rotation. Therefore, according to the present invention, the design is simplified, the number of manufactured parts is small, and the cost can be reduced.

In addition, when the rotating blade of the present invention is used, the opening ratio increases dramatically because only the thickness of the rotating blade blocks the flow path at the maximum opening. For this reason, since the charging / discharging to / from the tare is performed promptly, the measurement performance can be greatly improved.

In addition, since the lattice-like gate is reciprocating, manufacturing attention is required for sliding the movable lattice. However, in the rotating lattice of the present invention, bearings and concentric parts are used for the bearing portion. This makes it possible to omit adjustment work that maintains high accuracy.

When the rotor blade closes at the inlet gate part, it rotates so as to lift the particles accumulated in the tare, so there is a gap between the hopper part and the accumulated particles in the tare. Can be prevented from being applied to the tare as a load.
Patent No. 3616793 Method of measuring weight of granular material

The problem to be solved is that, in the conventional example, the granular material (for example, rice) stored in the hopper 1 is a lattice-shaped fixed gate 2 having a plurality of supply ports, and a lattice-shaped movable gate having substantially matching with it. The movable gate 3 is supplied to the tare 4 when the passage 6 is opened with respect to the fixed gate 2 via the insertion port 3. The weight of the tare 4 is measured by the load cell 8, and when the movable gate of the discharge port is opened as shown in FIG. 1A, the contents of the tare 4 are discharged.
The triangular shape of the portion corresponding to the fixed gate of the discharge portion is to prevent the accumulation of particles on the fixed gate.

  In such a measuring instrument, even if the charging gate is opened to the maximum, as shown in FIG. 1B, the opening is only the portion indicated by 6 and the particles cannot pass through the portion of the fixed gate 2. Further, even if it is in the discharge portion, the triangular portion cannot pass through the particles, so that about half of the gate structure portion prevents the passage of the particles.

Further, as another problem, when the supply gate tries to stop the supply while the particles pass, the movement of the movable gate 3 narrows the passage and closes the passage. There arises a problem that the particles are sandwiched between the movable gates 3 and crushed. For this reason, a gap 9 must be provided between the fixed gate 2 and the movable gate 3 as shown in FIG. Since the size of the void is related to the size of the particles to be handled, according to the conventional method, the measuring instrument must be uniquely associated with the particles to be handled.

  In the present invention, a gate constituted by a plurality of door-shaped rotating blades is used in place of the grid-like charging gate or discharging gate.

  The effect of the present invention is that the opening ratio through which the granules pass is large compared to the conventional technique that employs a grid-like gate, so that it is possible to save input time and discharge time, so that large-capacity granules can be processed in a short time. There is an advantage that you can.

In addition, when the type of granule to be handled is changed, it is necessary for the lattice-shaped gate to uniquely align the gap of the input gate with respect to the type of granule. No hardware changes are required just by setting the software.

Referring to FIG. 2B, one embodiment of the present invention is configured such that the rotor blades 12 having the center of rotation 13 in FIG. The tare 14 is suspended by a load cell 18 provided near the center of the upper part.

In this embodiment, one load cell is used as shown in FIG. 2, but it goes without saying that two load cells may be used as shown in FIG. The rotary blade 12 has a curved surface in order to withstand the load from the hopper and not to be deformed. Of course, the structure of the rotary wing may be the structure of an airplane wing as shown in FIG.

On the other hand, since there is no load cell in the discharge mechanism part, the rotor blades are arranged. The center of rotation 13 is not necessarily the shaft attached to the rotor blade.

When the rotary blade 17 becomes as shown in FIG. 2A at the discharge port, the contents of the tare are discharged. In such a configuration, it is the rotor blades 12 or 17 themselves and the load cell that obstruct the passage of the granule as in the conventional system. However, if the load cell is attached to the side of the tare as shown in FIG. It does not obstruct the passage. For this reason, the injection | throwing-in and discharge | emission of a granule are performed rapidly, and the processing capacity per hour improves.

In addition, the problem that the granule breaks up in the charging part is controlled by adjusting the rotation angle of the rotor blades, so that it can be controlled according to the size of the granule handling the gap immediately before the passage opening is closed. It becomes possible to correspond to a granular material of a certain particle size.

When the center of rotation of the rotor blade is substantially coincident with the center of curvature of the rotor blade, as shown in FIG. 3, the rotor blade rotates while rubbing against the particles when the gate is opened and closed. There is little torque. However, this structure has a problem that it is difficult to increase the opening area of the passage opening. In addition, when the center of rotation is arranged at the center of the rotor blade in contact with the rotor blade, the pressure from the hopper is applied to the rotor blade, and there is no problem in the portion facing downward when rotating, but the portion facing upward is a granule. Since it pushes up and rotates, a great amount of torque is required due to the pressure of the particles. Since this torque, that is, the moment of rotation is related to the length from the center of rotation, it is advantageous that the pushed-up portion is not long from the center of rotation.

In consideration of the effect of FIG. 3, the driving torque can be reduced if it is a little apart from the rotor blade surface and asymmetrical to the left and right. FIG. 4 shows how the rotor blades rotate as a gate with such a configuration.

FIG. 5 shows an embodiment in which the rotor blade has a bag-like structure, the rotation shaft has a center of rotation, and the rotation shaft is shifted from the center with respect to the width of the rotor blade to form an asymmetric structure.

In such a structure, the granules are put into the tare with the discharge gate closed from the hopper 1 through the gate mechanism and weighed by the load cell 18 and the load cell 68. The weighed particles are discharged by opening the discharge gate 17 and the discharge gate 67.

Since the present invention is as described above, it is software that controls the movement of the rotor blades even when the particle size of the granule is changed, such as rice, red beans, or soybean, as compared with the conventional method. By changing the setting, it becomes possible to cope with it, and the opening utilization rate of the area of the same gate mechanism is higher than that of the grid-like gate, and the time for loading and discharging can be saved, so that the efficiency of weighing can be improved. Is possible.

The principle of the conventional particle measuring instrument is shown. FIG. 1A shows a state in which the gate is closed at both the inlet and outlet, and FIG. 1B shows a state in which the inlet gate is open. FIG. 2 is a diagram showing the structure of a gate according to the present invention, and FIG. 2 shows the state of the gate corresponding to FIGS. 1A and 1B. It is the figure which match | combined the center of rotation of a rotary blade with the approximate center of curvature of a rotary blade. It is a figure which shows a mode that the rotary blade was rotated in the structure which shifted the rotation center of the rotary blade. It is a figure which shows a mode that the rotary blade was rotated in the Example which provided the bag-like structure to the rotary blade. It is a figure of the Example at the time of comprising the shape of a rotating blade in a bag shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hopper 2 Lattice-like fixed gate 3 Lattice-like movable gate 4 Tare 5 Discharge side fixed gate and triangular roof to prevent accumulation of granular material 6 Opening portion at opening of lattice-like gate 7 Lattice-like gate discharge side movable Gate 8 Load cell 11 Hopper 12 of the embodiment Rotary blade 13 of the embodiment Rotary center 14 of the rotary blade 14 Tare 15 of the embodiment Rotary center 16 of the discharge side rotary blade of the embodiment Particles when the rotating blade of the embodiment is opened Body Passing Port 17 Discharge Side Rotating Wing 61 Embodiment Hopper 62 Rotating Blade 63 Rotating Blade Rotation Center 64 Tare 65 Discharge Side Rotating Blade Rotation Center 66 Granule Passing Port 67 Grain Passing Port 67 Discharge Side Rotation Moving blade

Claims (5)

A means for measuring a granular material in which a plurality of door-like rotor blades are provided at the gate portion for the purpose of controlling charging or discharging into a tare. The means of the particle | grain measuring apparatus which respond | corresponds to the various particle sizes of the particle | grains to handle by controlling the space | gap when a rotary blade closes in Claim 1. A granular measuring instrument in which the center of rotation of the rotor blade gate is shifted from the center of the rotor blade. A rotating blade for a gate with a curved rotating blade gate and enhanced strain resistance due to load. A rotor structure that eliminates steps to prevent particles from accumulating on the rotor gate.

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