JP6727491B2 - Granular quantitative feeder - Google Patents

Description

The present invention relates to a quantitative feeder device for precisely and quantitatively discharging granules.

Conventionally, quantitatively discharging (supplying) a granular material in a trace amount has an effect on the physical properties of the granular material, such as specific gravity, particles, difference in particle size, and adhesiveness and cohesiveness due to moisture and static electricity. It has been a very difficult task.

With respect to such a problem, the applicant has developed the quantitative feeder device described in Patent Document 1. 4A and 4B show a quantitative feeder device described in Patent Document 1. A disk frame 51 is provided on the frame 50. A gear 54 for transmitting a rotational force is provided on the shaft of the speed reducer 53 connected below the motor 52. Reference numeral 55 is a container for storing the powder or granules (hopper) having an opening 55a for the powder or granules, which is the material, and is attached to the disc frame 51.

A drive unit is provided below the storage container 55, and the drive unit has a stirring shaft (main shaft) 56 whose upper end projects into the storage container 2. At the lower end side of the stirring shaft 56, a supply means 57 for feeding and supplying a fixed amount of powdery or granular material into the measuring grooves 58b, 58b,... The supply means 57 is a plurality of blades 57a, 57a provided along the tangential direction of the stirring shaft 56, and the tangent side edge of the blade 57a pushes powder particles by rotation.

The supply board 58 is formed of a disc, and has a substantially spur gear shape in which measuring grooves 58b, 58b... A part of the blades 57a, 57a... Is in sliding contact with the upper surface of the supply board 58, and the powder particles sent by the blades 57a, 57a. 58b, and the measuring grooves 58b, 58b... Are filled with powder particles.

The powder particles placed in the measuring grooves 58b, 58b,... Of the supply board 58 are sequentially dropped from above the discharge chute 60 and discharged. That is, one of the measuring grooves 58b, 58b,... Of the supply board 58 slides through the discharge chute 60. In Patent Document 1, a scraper gear 59 is provided above the discharge chute 60. The scraper gear 59 is provided with projecting teeth 59a, 59a, which mesh with the measuring grooves 58b, 58b,... Of the supply board 58, and forcibly discharges the powder or granules put in the measuring grooves 58b, 58b,. It is configured to discharge to.

Japanese Patent No. 5430170

However, in the apparatus disclosed in Patent Document 1, since the measuring groove 58b is rotated in a state of being filled with the powder or granular material, when the powder or granular material having high fluidity (hereinafter referred to as the granular material) is quantified. However, there is an inconvenience that biting occurs between the measuring groove 58b and the front and rear members (the supplying means 57, the scraper gear 59, etc.), which causes a problem.
The present invention has been made to solve such a problem, and an object of the present invention is to provide a quantitative feeder for granules capable of preventing biting.

The present invention has the following features in order to achieve the above object.

[1] A container for accommodating powder or granular material, a shutter mechanism for measuring the powder or granular material dropped from the container, and a discharge chute for discharging the powder or granular material measured by the shutter mechanism are arranged from above. Prepare in order,
In a plan view, the lower end of the container and the upper end of the discharge chute are arranged so that at least a part thereof overlaps,
The shutter mechanism has a disc-shaped disc having at least one measurement hole formed therein, and when the disc rotates, the disc rotates in a plan view at an overlapping portion of the lower end of the storage container and the upper end of the discharge chute. A quantitative powder feeder for measuring the granular material by passing the granular material from the lower end of the container to the upper end of the discharge chute when the measuring holes overlap.

[2] The quantitative feeder device according to [1], wherein the disc is replaceable, and the amount to be weighed can be adjusted by changing the diameter of the measuring hole and the rotation speed of the disc.

[3] The quantitative feeder device according to [1] or [2], wherein the disc is replaceable, and the supply interval (tact time) for each hole can be adjusted by changing the number of measuring holes.

[4] The shutter mechanism has a tray for accommodating a disc and having a tray in which a discharge hole is formed in an overlapping portion between a lower end of a storage container and an upper end of a discharge chute, [1] to [3]. apparatus.

It is sectional drawing which shows the whole structure of the fixed_quantity|quantitative_assay feeder apparatus of the granular material which concerns on embodiment of this invention. FIG. 3 is a plan view of a part of the granular material quantitative feeder device according to the embodiment of the present invention. It is a figure which shows the relationship between the position of the fixed_quantity|quantitative_assay hole of the disk of the powder quantitative feeder apparatus which concerns on this invention, and the discharge amount of the granular material from a discharge chute. It is a figure which shows the structure of the conventional quantitative feeder device. It is a figure which shows the structure of the conventional quantitative feeder device.

Hereinafter, a quantitative feeder for granules according to an embodiment of the present invention will be described with reference to the attached drawings.

FIG. 1 is a diagram showing the overall configuration of a granular material quantitative feeder device according to an embodiment of the present invention. As shown in FIG. 1, the granule quantitative feeder device includes a container 2 in which the granules 1 are housed, a shutter mechanism 3 for quantitating the granules 1 dropped from the container 2, and a shutter mechanism 3. A discharge chute 4 for discharging the crushed particles 1 is provided in this order from the top.

Further, this quantitative feeder device has a gantry 5 in which link arms are combined. A disc frame 8 is fixed on the gantry 5, and the disc frame 8 is provided with a container 2, a shutter mechanism 3, a discharge chute 4, and a motor 7 for driving the shutter mechanism 3. By operating the handle 6 of the frame 5, the entire disc frame 8 can be moved up and down.

The container 2 has a cylindrical shape having an opening 2a on the upper side through which the granular material 1 as a raw material is supplied, and has a tapered portion 2b whose diameter gradually decreases from the upper part to the middle part of the lower part, and the tapered part 2b. It has a cylindrical straight portion 2c having a constant diameter from the lower position to the lower end. The container 2 is mounted on the disc frame 8 via the shutter mechanism 3.

The shutter mechanism 3 has a cylindrical tray 31 having a bottom and a disc-shaped disc 32 housed in the tray 31. The central axis of the cylindrical tray 31 and the circular center of the disc-shaped disk 32 are arranged so as to coincide with each other. The tray 31 is fixed to the disc frame 8. The disk 32 is configured to rotate around the rotation shaft 33. The rotating shaft 33 is coupled to the output shaft of the motor 7 via a reducer (not shown).

The radius of the disc 32 is larger than the diameter (diameter) of the straight portion 2c of the storage container 2, and the straight portion 2c of the storage container 2 is arranged above the circle center of the disc 32 and the outer edge thereof.
In the disk 32, a plurality of circular fixed-quantity holes 32a, 32a,... Of the same shape are formed at equal distances from the center of the circle of the disk 32 at equal intervals in the circumferential direction.
A discharge hole 31 a having the same diameter as the discharge chute 4 is formed in the tray 31 at a position corresponding to the discharge chute 4.

Below the disc frame 7, a cylindrical discharge chute 4 is provided at a position corresponding to the storage container 2. The discharge chute 4 is arranged so as to penetrate the disc frame 8 and reach the bottom of the tray 31 (the lower end of the discharge hole 31a).

A ring-shaped slide pipe 5 is provided on the outer periphery of the straight portion 2c so that the granules 1 do not leak onto the disc 32 from the lower end of the straight portion 2c.

FIG. 2 is a plan view of a part of the quantitative feeder for granules according to the embodiment of the present invention. FIG. 2 shows the positional relationship among the straight portion 2c of the storage container 2, the disc 32, and the discharge chute 4.

In a plan view, the straight portion 2c of the storage container 2 (the lower end of the storage container 2) and the discharge chute 4 (the upper end of the discharge chute 4) are arranged so as to at least partially overlap. In FIG. 3, the straight portion 2c of the storage container 2 and the discharge chute 4 are arranged so as to coincide with each other. That is, in FIG. 3, the circular center of the cylindrical straight portion 2c and the circular center of the cylindrical discharging chute 4 are arranged so that the diameters of the straight portion 2c and the discharging chute 4 are the same. Has been formed.

The disk 32 has a plurality of measuring holes 32a, 32a. When located below the straight portion 2c, each of the measuring holes 32a, 32a,... Is at least equal to the overlapping portion of the straight portion 2c and the discharge chute 4 (in FIG. 2, the entire straight portion 2c and the discharge chute 4). The parts are formed at overlapping positions.

When the measurement hole 32a of the disc 32 overlaps with the overlapping portion of the straight portion 2c of the storage container 2 and the discharge chute 4 in plan view due to the rotation of the disc 32, the particles from the straight portion 2c to the discharge chute 4 are aggregated. 1 passage is formed, and the granules 1 pass from the lower end of the container 2 to the upper end of the discharge chute 4.

FIG. 3 is a diagram showing the relationship between the positions of the quantitative holes in the disc of the quantitative particle feeder according to the present invention and the discharge amount of the granular particles from the discharge chute. The horizontal axis of the graph of FIG. 3 is time [sec], and the vertical axis is the amount of discharge [g]. FIG. 3 shows a state in which one measurement hole 32a starts to overlap the overlapping portion of the straight portion 2c of the storage container 2 and the discharge chute 4 until the overlapping ends.

When the measuring hole 32a of the disc 32 starts to overlap with the overlapping portion of the straight portion 2c of the storage container 2 and the discharging chute 4 (beginning of discharging), the overlapping portion of the measuring hole 32a and the straight portion 2c (discharging chute 4). Is small and the discharge amount is small, but the discharge amount reaches a peak when the measuring hole 32a completely enters the straight portion 2c (discharge chute 4). Then, at the end of discharging, the overlapping portion between the measuring hole 32a and the straight portion 2c (discharging chute 4) is small and the discharging amount also decreases.

In this way, the discharge amount changes depending on the area where the measuring hole 32a of the disc 32 overlaps the overlapping portion of the straight portion 2c of the storage container 2 and the discharge chute 4 and the time thereof. Therefore, the discharge amount can be controlled by changing the diameter of the measuring hole 32a, the size of the measuring hole 32a, and the rotation speed of the disk 32. The diameters of the straight portion 2c and the discharge chute 4 may be changed in order to control the discharge amount.

Next, the operation of the granular feeder device configured as described above will be described. The granules 1 loaded in the opening 2a of the container 2 move from the tapered portion 2b to the straight portion 2c by their own weight.

As described above, since the straight portion 2c of the storage container 2 and the discharge chute 4 are arranged so as to at least partially overlap each other in plan view, the disc 32 rotates and the fixed amount hole 32a of the disc 32 is formed. When moving to a position below the straight portion 2c, the granules 1 accommodated in the container 2 pass through the metering holes 32a of the disc 32 from below the straight portion 2c and are discharged from the discharge chute 4.

When the disc 32 further rotates and a portion of the disc 32 which is not the fixed amount hole 32a moves to the bottom of the straight portion 2c, the straight portion 2c is closed by the disc 32 and the discharge of the granules 1 to the discharge chute 4 is interrupted. It

Then, when the disc 32 further rotates and the next fixed amount hole 32a of the disc 32 moves to below the straight portion 2c, the granules 1 pass from the lower portion of the straight portion 2c through the fixed amount hole 32a of the disc 32 and shoot. Emitted from 4. Thereafter, by repeating this, the quantified granular body 1 is intermittently discharged from the discharge chute 4.

For example, a transport device (not shown) that conveys a plurality of containers (not shown) arranged at predetermined intervals is arranged under the discharge chute 4, and the container is set and stopped under the discharge chute 4. By synchronizing the timing of performing and the timing of discharging the granules 1, the quantified granules 1 can be stored in a container that is sequentially transported. The time from setting a container to setting the next container is called tact time.

Next, the effect of the present invention will be described. According to the present invention, in plan view, the straight portion 2c of the storage container 2 and the discharge chute 4 are arranged so as to overlap with each other, and the rotating disk 32 is formed with the fixed amount hole 32a between the storage container 2 and the discharge chute 4. To place. Thereby, the opening and closing of the passage of the granules 1 from the straight portion 2c to the discharge chute 4 is switched by alternately overlapping the metering holes 32a and the portions other than the metering holes 32a, and the metering and discharging of the particles 1 are instantaneously performed. It can be carried out.

In the present invention, since the straight portion 2c of the storage container 2 and the discharge chute 4 are arranged so as to overlap each other in a plan view, as in the conventional case, the weighed granular material 1 is rotated to the discharge chute 4. Since it is not necessary to convey the material, it is possible to prevent the bite from being caught, and it is possible to significantly shorten the processing time for the fixed amount discharge.

Further, as in the conventional quantitative feeder device shown in FIG. 4, it is necessary to forcibly push the powder particles into the measuring grooves 58b, 58b from the container 55 by the tangential edge of the blade 57a by rotation. Since it is not necessary, it is possible to simplify the device and suppress the manufacturing cost, and it is possible to prevent the powder particles from being ground and abraded by the components constituting the device.
Further, since it is not necessary to put the powder or granular material in the measuring grooves 58b, 58b for rotational movement, it is possible to reduce pulsation when operating the device.
In particular, the present invention is suitable for weighing powder particles having high fluidity (mainly particles).

In the present specification, the term “granular material” is a generic concept that includes powder and powder. Here, there is no clear distinction between powder and granules, but in the present specification, those having low fluidity are defined as powders and those having high fluidity are defined as granules. That is, the present invention can be used for all powders and granules, but is suitable for quantifying powders having high fluidity.

For example, in the case of particles having high fluidity, it is not necessary to provide the stirring shaft 56 in the storage container 55 as in the conventional quantitative feeder device shown in FIG. 4, so that the device can be simplified and the manufacturing cost can be suppressed. At the same time, it is possible to prevent the powder and granules from rotating and from abrading the parts constituting the device.

In the present invention, since the ring-shaped slide pipe 5 is loosely fitted on the outer periphery of the straight portion 2c, the slide pipe 5 comes into contact with the disc 32 by its own weight, so that the particles 1 are prevented from leaking onto the disc 32. The body 1 can be worn.

Further, if the slide pipe 5 is provided, even if the lower end of the straight portion 2c and the upper surface of the disc 32 are not in contact with each other, the granules 1 can be measured and discharged instantaneously, so that the position of the container 2 can be adjusted. Can be easy.

Since the disc 32 can be easily replaced, the supply amount of the granules 1 can be changed by changing the rotation speed of the disc 32 and the diameter of the fixed amount holes 32a, and the number of fixed amount holes 32a can be changed. By doing so, the takt time can be changed. Therefore, it is possible to easily change the supply amount of the granules 1 and the tact time by preparing a plurality of disks 32 having different diameters of the metering holes 32a and the number of the metering holes 32a and exchanging the used disks 32. You can also

Further, the rotation of the disk 32 is not limited to the speed adjustment, and the rotation of the disk 32 is predetermined when the measuring hole 32a of the disk 32 overlaps the overlapping portion of the straight portion 2c of the container 2 and the discharge chute 4. By controlling so as to stop for a time, a larger amount of powder or granules can be discharged quantitatively.

In the above description, the straight portion 2c of the storage container 2 and the discharge chute 4 are both formed in a cylindrical shape. However, an inclined cylinder or a tapered shape whose diameter changes may be used. Good. In this case, the effect of the present invention is obtained if the lower end of the container 2 and at least a part of the upper end of the discharge chute 4 overlap in a plan view.

In the above description, the straight portion 2c and the discharge chute 4 of the storage container 2 have the same shape in a plan view, but the straight portion 2c and the discharge chute 4 may have different diameters, and the planar shape is The shape is not limited to a circle and may be various shapes.

In particular, in the container 2 of the present invention, it is preferable to insert a ventilation pipe (not shown) along the axial direction. If this ventilation pipe is inserted below the straight portion 2c while the circular centers of the cylindrical discharge chute 4 are aligned, the granules 1 will fall from the periphery of the ventilation pipe into the metering holes 32a. Draw a mortar shape at. This makes it possible to uniformly discharge the particles and reduce pulsation and clogging.
The present invention can be modified in various ways regardless of the above-described embodiment without departing from the gist of the invention.

DESCRIPTION OF SYMBOLS 1 Granule 2 Storage container 2a Opening 2b Tapered part 2c Straight part 3 Shutter mechanism 31 Tray 31a Discharge hole 32 Disc 32a Measuring hole 33 Rotating shaft 4 Discharge chute 5 Frame 6 Lever 7 Motor 8 Disc frame

Claims (2)

A storage container in which the powder or granular material is stored, a shutter mechanism for measuring the powder or granular material dropped from the storage container, and a discharge chute for discharging the powder or granular material measured by the shutter mechanism, in this order from the top,
In a plan view, the lower end of the container and the upper end of the discharge chute are arranged so that at least a part thereof overlaps,
The shutter mechanism has a bottomed cylindrical shape with an open upper portion, and a tray having a discharge hole formed in the bottom portion that at least partially overlaps the overlapping portion of the lower end of the container and the upper end of the discharge chute in plan view. , A disc-shaped disc that is housed in the tray and has at least one measuring hole formed therein, and the disc is rotated so that when the disc is rotated, an overlapping portion of the lower end of the storage container and the upper end of the discharge hole is formed. , when the measurement hole of the disc are overlapped, by passing from the lower end of the container the bulk material into the upper end of the discharge chute through a discharge hole, it has rows weighing granule,
The storage container has a cylindrical straight portion with a constant diameter at the lower end, and a ring-shaped slide pipe is loosely fitted on the outer periphery of the straight portion, and the slide pipe comes into contact with the disc by its own weight to form powder particles. A quantitative powder feeder that scrapes powder particles while preventing them from leaking onto the disc . The quantitative feeder device according to claim 2, wherein the lower end of the straight portion is arranged inside the slide pipe with a predetermined distance from the upper surface of the disc .

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