JPH0626818Y2 - Granular material quantitative supply device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a chute of a supply device for continuously supplying a fixed amount of powder or granular material such as a drug.

[Prior Art and Problems Thereof] As shown in FIG. 1, a tray 1 of a weighing device 11 is provided for a powder or granular material discharged from a powder or granular material hopper 10 by a vibrating feeder 13.
2 Weigh it into the motor 2 and weigh it to the motor 1
3'is uniformly supplied throughout the annular V-mass 17 between the rotary disk 14 which is rotationally driven by the 3'and the cone 16 supported by the tapered surface 15 on the outer periphery thereof, and after the supply, the cone 16 is supplied. In the capacity dividing device that ascends and drops the powder or granules in the V mass 17 into the powdery or granular material pan 18 in the annular arrangement arranged below, the weighing device 1
The powdery-particles quantitative supply device 20 is arranged between the saucer 12 of No. 1 and the V-mass 17 to continuously and quantitatively supply the powdery particles in small amounts.

As the powder and granular material quantitative supply device 20, as shown in the figure, a support base 2 supported by a coil spring 21.
The lower part of the two inclined elastic plates 23 is attached to 2, the chute 24 is attached to the upper part of the elastic plate 23, and the chute 24 is slightly vibrated by the operation of the vibration exciter 25 supported by the support base 22. It is conventionally known that the powder or granular material supplied to the upper portion of the chute 24 is dropped from the tip of the chute 24 in a thin film shape.

By the way, when the above-mentioned powder and granular material supply device 20 is adopted in the capacity dividing device, it is necessary to raise the cone 16 after the powder and granular material in the upper part of the chute 24 is completely discharged. It is necessary to detect that the upper granules have been completely discharged. When detecting that,
A light emitting element and a light receiving element are arranged below the tip of the chute 24, and the light transmission signal is used as a discharge completion signal of the powder or granular material.

However, the chute 2 of the conventional powder and granular material supply device
As shown in FIG. 5, since No. 4 has a configuration in which the granular material is dropped in a thin film form from the linear tip edge of the bottom plate 30, just before the granular material above the chute 24 is completely discharged. The uneven distribution of the powder particles on the upper part of the chute 24 does not cause the powder particles to fall uniformly over the entire length of the tip edge of the chute 24, and the powder particles are completely detected when the light emitting element 31 and the light receiving element 32 are detected. However, there is an inconvenience that various discharges cannot be detected accurately.

[Purpose of device]

It is an object of the present invention to provide a powder and granular material quantitative supply device capable of accurately detecting that the powder and granular material quantitatively discharged by the vibration applied to the chute is completely discharged. .

[Means for achieving the purpose]

In order to achieve the above object, in the present invention, a flat V-shaped depression having a width gradually decreasing toward the tip is formed at the central portion of the tip of the bottom plate of the chute to which slight vibration is applied. The bottom surface is inclined with a downward slope toward the tip, and a detector is provided to detect the fall of the powder or granules facing the drop discharge path of the powder or granules discharged from the tip of the depression. .

[Action]

According to the above configuration, when the amount of the powder or granules discharged from the tip of the chute becomes small due to the vibration of the chute,
The powder and granules flow into the depression, and as they move forward, they are gathered together in the central portion of the depression and intensively and continuously fall from the tip of the depression. Since the detector is provided so as to face the drop discharge path, it can be surely detected by the detector whether or not the powder particles on the chute are completely discharged.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

Since the overall structure of the powder and granular material supply device is the same as that of FIG. 1 described above, the same parts are designated by the same reference numerals and the description thereof will be omitted.

As shown in the drawing, the chute 1 has a configuration in which a pair of side plates 3 and a back plate 4 are provided on the remaining peripheral edge of the bottom plate 2 excluding the leading edge.

At the center of the tip of the bottom plate 2, there is formed a V-shaped depression 5 having a V-shaped plane whose width dimension gradually decreases toward the tip of the bottom plate 2, and the bottom surface 6 of the depression 5 is inclined with a downward slope toward the tip. There is.

A detector 7 is provided below the chute 1 so as to face the drop discharge path for the powder particles discharged from the tip of the depression 5 and to detect the drop of the powder particles.

As the detector 7, a light reflection type is used here.

In the powdery granular material supply device having the above configuration, when a predetermined amount of powdery material is supplied onto the chute 1 and the chute 1 is slightly vibrated by the operation of the vibrator 25, the powdery material on the chute 1 becomes It moves toward the tip of the chute and falls from the entire tip edge of the bottom plate 2 in the form of a thin film.

When the remaining amount of the powder or granules on the upper part of the chute 1 becomes small, the powder or granules flow into the recess 5. Here, since the depression 5 has a V-shaped planar shape, the powder particles inside the depression 5 are the chute 1
As it moves toward the tip of the depression 5, it is gathered in the central portion of the depression 5 and drops intensively from the tapered portion of the tip of the depression 5, and the bottom surface 6 of the depression 5 is inclined with a downward slope toward the tip. Therefore, it is discharged very smoothly.

In this way, a small amount of powder and granules are intensively and continuously dropped and discharged, and since the detector 7 is provided facing the discharge path, the powder and granules on the chute 1 are discharged by the detector 7. It is possible to reliably detect whether or not it has been done.

[Effect of device]

As described above, in the granular material quantitative supply device according to the present invention, when the granular material on the chute becomes small, the granular material flows into the dent, and the width of the dent increases as it moves toward the tip of the chute. The particles are gathered together in the central part of the direction, and are discharged continuously in a concentrated manner from the tapered portion at the tip of the depression, so the powder particles on the chute are completely discharged by the detection path provided opposite to the drop discharge path. It can be accurately and reliably detected.

Also, by sloping the bottom surface of the depression with a downward slope, it is possible to smoothly discharge the powder and granules in the recess, and the drop discharge speed becomes faster, so even if the quantity of powder and granules is small It can be discharged in a fixed amount.

[Brief description of drawings]

FIG. 1 is a schematic view of a capacity dividing device, FIG. 2 is a vertical sectional side view of a constant quantity supply device according to the present invention, FIG. 3 is a perspective view of the same chute, FIG. 4 is a plan view of FIG. FIG. 5 is a plan view showing a conventional chute. 1 ... shoot, 2 ... bottom plate, 5 ... dent, 6 ... bottom surface, 7 ... detector.

Claims (1)

[Scope of utility model registration request] 1. A quantitative supply apparatus for powder and granules, wherein microscopic vibration is applied to an elastically supported chute so that powder and granules supplied onto the chute are continuously dropped and discharged from the tip of the chute. Is formed in the central portion of the bottom plate tip portion of the bottom plate having a planar V-shape whose width dimension gradually decreases toward the tip, the bottom surface of the depression is inclined with a downward slope toward the tip, and is discharged from the tip of the depression. A powder and granular material quantitative supply device, characterized in that a detector for detecting the powder or granular material falling is provided facing the powder and granular material discharge path.