JP5820148B2 - Quantitative feeder for granular material - Google Patents

Description

  The present invention relates to a quantitative feeder device for granular materials, in which large granular materials such as pellets, in particular pellets, can be aligned and supplied in a fixed amount by one or several particles.

  Conventionally, in general powder quantitative feeders, unless the fluidity has a particularly excellent characteristic, the powder is quantitatively conveyed and supplied in a very small amount of physical properties such as specific gravity, It is a very difficult task, affected by the difference in particle size, particle size, adhesion and aggregation due to moisture and static electricity.

  Conventionally, vibratory feeders, screw feeders, and table feeders are known as fine powder feeders. Of these, vibratory feeders can be used for powders with good fluidity, but applicable powders are limited. In addition, manual flow control is required in a minute range, and sufficient control cannot be performed, resulting in unevenness and poor accuracy. Another major bottleneck is the need to rely on human hands.

  In addition, in the case of screw feeders, both the horizontal type and the auger type, when the amount of powder to be conveyed becomes very small, the spiral screw groove becomes inevitably smaller in both width and depth. It is easy for powder to adhere to and adhere to, and the groove is filled into a rod shape. Conversely, since the amount of powder is small, the frictional force between particles is insufficient, slipping, and discharging is impossible. There are many cases that become.

  Furthermore, in the case of a table feeder, it has been experimentally found that it is the most effective and effective, but sometimes the powder remains in the measuring groove of the supply board and does not discharge, or returns to the container as it is. Will happen. Here, a method of blowing off by blowing air can be considered, but this may cause the powder to scatter around and deteriorate the atmosphere, or cause the powder to enter the machine components and cause a failure. There is also.

  In view of this point, the applicant has developed a technique as shown in the prior patent document. This is shown in FIG. 6 to FIG. 8 as the prior art. 6 to 8, reference numeral 9 denotes a gantry, and a disk frame 10 is provided on the gantry 9. In the figure, reference numeral 8 denotes a motor, and a rotational force transmission gear 8b is provided on the shaft of a speed reducer 8a connected to the lower side of the motor 8.

  On the other hand, reference numeral 2 in the figure denotes a powder container (hopper) having a powder inlet 1 as an object opened upward, and has a straight cylindrical shape for the purpose of preventing bridging. The container 2 is attached to the disk frame 10. A drive unit is provided below the container 2, and the drive unit has a stirring shaft 11 whose upper end protrudes into the container 2, and the lower end of the stirring shaft 11 is rotated from the gear 8 b described above. A gear 13 for transmitting force and rotating the stirring shaft 11 is provided, and a transmission gear 14 is interposed between the gear 13 and the gear 8b.

  A part of the agitation shaft 11 is provided with a substantially L-shaped agitation rod 3 in the accommodating container 2, and the agitation rod 3 rotates synchronously with the agitation shaft 11, thereby 2 to prevent the powder from bridging or sticking. Below the stirring bar 3, a half-moon shaped partition plate 12 is provided with a slight gap from the inner wall surface of the storage container 2, and the interior of the storage container (hopper) 2 is separated by using the partition plate 12 as a partition wall to supply means 4. The powder pressure supplied to the container 2 is kept constant, the fluctuation of the supply amount accompanying the change in the remaining amount of the material inside the container 2 is minimized, and quantitative supply can be performed with higher accuracy.

  Further, on the lower end side of the agitation shaft 11, a supply means 4 for sending and supplying a fixed amount of powder into a measurement groove of a supply board described later is attached. The supply means includes a plurality of blade bodies 4a, 4a,... Provided along the tangential direction of the stirring shaft 11, and the tangential side edge of the blade body 4a pushes the powder by rotation, and the container (hopper) 2) It is supposed that there is no effect of leaving the material inside and forcibly feeding the material which is difficult to be supplied to the measuring grooves 5b, 5b.

  Further, the gear 13 that receives the rotational force of the stirring shaft 11 transmits the rotational force to the gear 16 of the rotational shaft 5a provided with the supply board 5 at the upper end via the transmission gear 15, and this rotational shaft 5a The supply board 5 is rotated in the same direction as the stirring shaft 11.

  The above-mentioned supply board 5 is formed of a disk, and has a substantially spur gear shape in which measuring grooves 5b, 5b,... The blade bodies 4a, 4a,... Are partly in sliding contact with the upper surface of the supply board 5, and the powder fed by the blade bodies 4a, 4a,. 5b... And the measuring grooves 5b, 5b.

  On the other hand, reference numeral 7 in the figure denotes a discharge chute, and the powder put in the measuring grooves 5b, 5b,... Of the supply board 5 is sequentially dropped from above the discharge chute 7 and discharged. That is, one of the measurement grooves 5b, 5b... Of the supply board 5 passes through the upper surface opening of the discharge chute 7 in sliding contact.

  Above the discharge chute 7, a forced discharge portion 6 is provided in the disk frame 10. In this embodiment, the forced discharge portion 6 uses a scraper gear, and the projecting teeth 6a, 6a,... Mesh with the measuring grooves 5b, 5b,.

  This scraper gear rotates synchronously with the supply board 5 by meshing the measuring grooves 5b, 5b... Of the supply board 5 with the projecting teeth 6a, 6a. That is, the scraper gear itself does not require a special rotational drive source. When the teeth 6a, 6a,... Mesh with the measuring grooves 5b, 5b, the powder remaining in the measuring grooves 5b, 5b, is forcibly pushed out or scraped off to the discharge chute 7.

  By this action, the powder does not remain in the measuring grooves 5b, 5b, etc., and the precise amount is continuously discharged. Since this action is performed regardless of the physical properties of the powder, its use is not limited by the type of powder.

JP 2009-184778 A JP 2010-189073 A Application for Japanese Patent Application No. 2011-48628

  The problem to be solved by the present invention is to stir the target granular material in the container, but this operation is mainly for preventing bridging, and in the case of large particles such as pellets, it is not suitable, on the contrary, The object may be damaged, and the supply of the object to the supply board is shifted to the outer periphery deviated from the center thereof, so that the deviation occurs.

In order to solve the above-described problems, the quantitative feeder for granular material according to the present invention has a powder container, a drive unit installed below the container, and interlocked with the drive unit. A feeder for rotating and conveying the granular material, and a quantitative feeder device for the granular material comprising a discharge chute formed below the outer end of the supply plate, wherein the container is and a small diameter that associates the lower end opening in the center of the supply plate, the lower end opening edge of the container and Ri pass to form a gap tare of granular material between the feed plate, the center of the upper surface of the above-mentioned feed plate In the powder feeder, the part of which is provided with a feeder disc holder, a leakage prevention member for the particulate matter is provided on the discharge chute side of the feeder disc holder, and the leakage prevention member is a half pipe Straight pipe section at the lower end of the container Of the that is fixed upward to the outer surface, the container bottom and is characterized in that is provided so as to close the gap between the supply plate, the above-described container is of a second container with a cylindrical A ring-shaped spacer is provided that is joined to the lower end and holds and adjusts the gap.

In addition, the powder quantitative feeder according to the present invention is characterized in that a part of the above-mentioned feeding board presser is provided with a groove for supplying a rounded bottom-shaped powder, and the outer periphery of the aforementioned container A cover casing is provided on the inner surface of the cover casing, near the opening of the discharge chute, along the outer shape of the supply board on the rotation secondary side of the supply board, and at an obtuse angle with respect to the rotation direction of the rotation board. It is characterized by providing a discharge auxiliary plate .

  The quantitative feeder apparatus for granular materials according to the present invention is configured as described above. Therefore, while using an existing table feeder, large particles such as pellets can be satisfactorily supplied one by one or several at a time. In addition, the particle size can be adjusted by the interposition of the spacer, and the object is supplied from the central portion of the supply board, so that no slippage occurs and biting and slipping are prevented. be able to. In addition, no agitation work or scraping work is required.

It is a mechanism figure which shows the fixed_quantity | assay feeder apparatus of the granular material which concerns on this invention. It is a top view. It is a principal part enlarged view. It is a figure which shows the other Example provided with the material leakage prevention member. It is a principal part top view. It is a mechanism figure which shows a prior art example. It is a top view which shows a gear part. It is a top view which shows a conveyance system.

  This was realized by configuring as illustrated in the drawings and described in the examples.

  Next, a preferred embodiment of the present invention will be described with reference to FIGS. In addition, about the part which is common in a prior art example, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. In the figure, reference numeral 9a denotes a gantry. The gantry 9a has a structure in which link arms are combined, and can be moved up and down by operating the handle 9b.

  A cover plate 10a is superposed on the surface of the disk frame 10, and a circular hole is formed in the disk frame 10 and the cover plate 10a at a portion corresponding to the rotating shaft 23. The inner wall of the circular hole is a standing wall 22a. It suppresses that the target object G mentioned later does not overflow around.

  A central portion of the supply board 20 is fitted to the upper end of the rotating shaft 23, and a supply board holder 24 is attached to the center of the supply board 20. The supply plate holder 24 may be fitted to the tip end of the rotary shaft 23 or may be a headed screw screwed to the upper end surface of the rotary shaft 23. Further, in the drawing, the supply board 20 is tapered toward the lower end at the peripheral edge, but a flat disk can also be used, and the presence of teeth for feeding the object G is not particularly required.

  In the figure, reference numeral 30 denotes a cover casing. The cover casing 30 has a cylindrical shape whose diameter gradually decreases downward, and flanges 30a and 30b are integrally formed at the upper and lower opening edges. ing. The cover casing 30 has a lower flange 30a installed and fixed on the cover plate 10a at the outer peripheral portion of the standing wall 22a.

  A storage container (tapered inner hopper) 31 is provided in the cover casing 30. The storage container 31 has a configuration in which the upper position is slightly higher than the cover casing 30 and has a cylindrical shape with a gradually decreasing diameter from the upper part to the lower part, and is straight from the lowest position of the tapered part to the lower end. The cylinder has a lower end opening corresponding to the central portion of the supply board 20 and is configured to cover the supply board retainer 24.

  A flange 31a is integrally formed at the upper surface opening of the container 31. The flange 31a is positioned above the upper flange 30b of the cover casing 30, and a ring-shaped spacer 32 is provided between the flanges 31a and 30b. Intervened. Depending on the thickness of the spacer 32, the gap distance between the lower end opening edge of the container 31 and the supply board 20 can be maintained, and the gap distance can be adjusted according to the particle size of the object G.

  Further, a cylindrical second container 2 used as a conventional example is overlaid on the container 31 and penetrates the spacer 32 from above the joining flange by a fastening element such as a screw, so that the cover casing 30 The upper flange 30b is joined and fixed. The connection of the second storage container 2 makes it possible to increase the storage amount of the object G.

  Further, when the existing drive system is applied and used, the stirring shaft 11 rotates. However, in this embodiment, the stirring shaft 11 is not used, so the stirring shaft 11 is stirred to prevent accidents and ensure safety. Cover with the shaft cover 11a. In the figure, reference numeral 28 denotes a bearing for the rotary shaft 23.

  In this embodiment, the object G put into the storage container 31 flows out from the gap between the lower end opening edge of the storage container 31 and the supply board 20 toward the outer periphery of the supply board 20. This is sequentially conveyed to the discharge chute 7 by the rotation of the supply board 20, but suddenly, in order to control going from the upper surface of the supply board 20 to the discharge chute 7, It is also possible to guide the object G by forming a bottom round supply groove 24a that matches the particle diameter. The supply groove 24a works better by initially setting the supply board 20 in a rotating state and then putting the object G into the storage container 31.

  On the other hand, FIG. 4 to FIG. 5 show another embodiment, and the second container 2 is not particularly shown, but can be used as necessary. In this case, a spacer 32 for forming, holding, and adjusting a gap between the storage container 31 and the supply board 20 is interposed between the disk frame 10 and the cover plate 10a.

  In this case, a leakage preventing member 33 for the object G is provided on the supply chute 24 on the discharge chute 7 side so as to close the gap between the lower end of the container 31 and the feed disc 20. This leakage prevention member 33 is a half-pipe shape and is fixed to the outer wall surface of the straight pipe portion of the storage container 31, and prevents the supplied object G from suddenly entering the discharge chute 7.

  The powder quantitative feeder in the embodiment is configured as described above. Although not specifically illustrated, a pressure dispersion member for the object G can be attached to the apparatus within the tapered portion of the container 31. As this pressure dispersion member, a plurality of support legs are provided on the lower edge of the cone-shaped or spherical shape of the cap body, and the object G passes between the support legs. Then, the support leg is brought into contact with the inner wall of the tapered portion. As a result, the pressure applied to the central portion of the supply panel 20 is reduced, and the supply panel 20 can be rotated smoothly.

  In addition, a discharge auxiliary plate for the object G can be provided on the inner surface of the cover casing 30 near the opening of the discharge chute 7 and on the secondary rotation side of the supply board 20. The discharge auxiliary plate is installed along the outer shape of the supply board 20 at an obtuse angle with respect to the rotation direction of the supply board 20, thereby holding down the object G that has failed to enter the discharge chute 7. It is prevented from passing through while remaining on the turntable 20 without being discharged.

2 Container 7 Discharge chute 10 Disc frame 10a Cover plate 11a Agitation shaft cover 20 Supply panel 23 Rotating shaft 24 Supply panel retainer 24a Supply groove 30 Cover casing 31 Storage container 32 Spacer 33 Leakage prevention member G Object

Claims (4)

A drive unit having a powder container, a drive unit installed below the container, a supply plate attached to a rotary shaft interlocked with the drive unit, and rotating and conveying the powder material, and the supply plate It is a quantitative feeder device for a granular material consisting of a discharge chute formed below the outer end of the container, wherein the storage container has a small diameter corresponding to the central portion of the supply panel, and the lower end opening of the storage container edge and Ri formed tare gaps for passage of the granular material between the feed plate, in a quantitative feeder apparatus granular material which is provided with supply board pressing on the upper surface central portion of the above-described supply board, the supply There is a leakage prevention member for the granular material on the discharge chute side of the presser foot, and the leakage prevention member has a half-pipe shape and is fixed upward on the outer surface of the straight pipe part at the lower end of the container. The clearance between the lower end of the container and the supply panel Determination feeder apparatus granular material, characterized in that provided in the Guyo. The said container is joined to the lower end of the cylindrical 2nd container, and the spacer of the ring shape which hold | maintains and adjusts the said clearance gap is provided. Quantitative feeder device for powder particles. The powder feeder for quantitative determination of powder according to claim 1 or 2, wherein a groove for supplying powder particles having a rounded bottom surface is formed in a part of the above-mentioned supply board presser . A cover casing is provided on the outer periphery of the container, and on the inner surface of the cover casing, near the opening of the discharge chute, along the outer shape of the supply panel on the rotation secondary side of the supply panel, with respect to the rotation direction of the rotation disk. 4. The powder quantitative feeder according to claim 1, wherein a powder discharge auxiliary plate is provided at an obtuse angle . 5.

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