JP4316954B2 - Table feeder - Google Patents

Description

  The present invention relates to a table feeder, which is a device for continuously and quantitatively discharging powder particles or crushed pieces stored in a storage tank using a rotary table, and more specifically, supplying a substance having poor fluidity. It is related with the table feeder suitable for this.

  There is a table feeder as a device for supplying powder particles continuously and quantitatively using a rotary table. A typical table feeder includes a storage tank for storing powder particles and the like, and a rotary table disposed at the bottom of the storage tank (see, for example, Patent Document 1). This rotary table includes a weighing chamber which is a plurality of spaces partitioned in the circumferential direction of the outer peripheral portion, and the weighing chamber discharges the received contents from the upper opening for receiving the contents in the storage tank. Has a lower opening.

  Then, by rotating the rotary table in a predetermined direction and moving each measuring chamber through the introduction area and the discharge area, the upper opening is opened and the lower opening is closed in the introduction area, and the upper opening is closed in the discharge area. In addition to being closed, the lower opening is opened to the discharge port, and the introduced material introduced into the measuring chamber is discharged to the discharge port in the discharge area.

  Therefore, by defining the number of rotations of the rotary table and the volume of the measuring chamber, the granular material accommodated in the storage tank is continuously and quantitatively supplied from the discharge port to the supply destination.

Japanese Examined Patent Publication No. 4-53778 (FIGS. 1 and 2)

  This table feeder is used as an apparatus for quantitatively supplying industrial waste such as waste plastic crushed material to a recycling apparatus or the like. Other types of industrial waste include cotton like cushions made from urethane, fine pieces of sheet-like materials such as plastic sheets in greenhouses, cut pieces of tape-like materials, and A wide variety of wood chips. However, when a material such as this waste plastic crushed material is handled by a table feeder, there are the following problems to be solved.

(1) Continuous and quantitative supply is difficult:
A substance such as waste plastic crushed material is a difficult-to-flow substance having poor fluidity due to its properties. Therefore, it is difficult to flow into the weighing chamber of the rotary table. If the agitation means is provided in the storage tank so as to assist the flow and inflow, conversely, the contained material is partially compressed and fixed by the agitation means, or a cavity is partially formed. As this fixing proceeds, the stirring means may not move or may be damaged. Therefore, it is difficult to continuously and quantitatively supply a hardly flowable substance such as waste plastic crushed material by a table feeder.

(2) In particular, sticking easily occurs in the discharge area:
In the discharge area, the upper opening of the weighing chamber is closed and worn, so that the quantity of the contents introduced into the weighing chamber is secured. A hard-to-flow material such as a product is particularly easily compressed and fixed.

  The present invention has been made in view of the above-mentioned facts, and the technical problem thereof is that it is possible to supply a difficult-flowing substance such as waste plastic crushed material smoothly and continuously and quantitatively. To provide a table feeder.

  As a result of intensive studies and experiments, the present inventors have confirmed that, by improving the storage tank and the rotary table of the table feeder, the hardly flowable substance can be supplied continuously and quantitatively with a smooth flow.

That is, according to the present invention, a storage tank and a rotary table that is rotatably arranged in the storage tank are provided, and the rotary table receives an upper opening for receiving the contents in the storage tank and the received storage. A plurality of weighing chambers having a lower opening for discharging objects are provided at intervals in the circumferential direction, and each of the weighing chambers rotates along the inner peripheral wall of the storage tank by rotating the rotary table in a predetermined direction. It is moved through the introduction area and the discharge area, the upper opening is opened and the lower opening is closed in the introduction area, and the upper opening is closed and the lower opening is formed in the storage tank in the discharge area. A table feeder,
The storage tank includes a conical cylinder portion having an annular inclined surface that extends from the inner peripheral wall toward the inward upper side of the storage tank above the measuring chamber, and the rotary table has an upper surface facing the inclined surface. A plurality of blades arranged radially, and the contents in the storage tank are pushed out toward the inclined surface by the blades that rotate together with the rotary table, and are pushed toward the lower measurement chamber by the inclined surface. A table feeder is provided.

  According to the table feeder configured in accordance with the present invention, an annular inclined surface extending from the inner peripheral wall of the storage tank toward the upper inward direction of the storage tank is provided above the weighing chamber, and the upper surface of the rotary table is directed to this inclined surface. Since the radial blades extending in the direction are provided, the contents in the storage tank are pushed out toward the inclined surface by the blade plates rotating together with the rotary table, and are pushed toward the lower measuring chamber by the inclined surface. Therefore, the flow of the contents to the measuring chamber can be improved and the measuring chamber can be easily filled, so that a hardly flowable substance such as waste plastic crushed material can be supplied continuously and quantitatively.

  Hereinafter, a table feeder constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.

  First, the outline will be described with reference to FIGS. The table feeder denoted as a whole by a number 2 includes a cylindrical container-like storage tank 4 and a rotary table 8 that is rotatably arranged on a bottom wall 6 in the storage tank 4. The turntable 8 has a circumferential direction in the weighing chamber 10 having an upper opening 10a for receiving the contents in the storage tank 4 and a lower opening 10b for discharging the received contents to the discharge port 12 formed in the bottom wall 6. A plurality (12 in the illustrated embodiment) are provided at intervals. When the rotary table 8 is rotated in a predetermined direction indicated by an arrow 14 (counterclockwise in the plan view of FIG. 2), each of the weighing chambers 10 passes through the introduction area R and the discharge area D along the inner peripheral wall 16 of the storage tank 4. Moved.

  The storage tank 4 includes a discharge plate D that protrudes inward from the inner peripheral wall 16 and closes the upper opening 10a of the measuring chamber 10 before and after the discharge region D. Accordingly, the weighing chamber 10 has the upper opening 10a opened in the introduction area R and the lower opening 10b closed by the bottom wall 6, and the upper opening 10a closed in the discharge area D by the scraping plate 18 and the lower opening. 10 b is opened to the discharge port 12 of the bottom wall 6.

  A description will be given with reference to FIG. 3 together with FIGS. The storage tank 4 has a bottom plate portion 4a that forms the above-described bottom wall 6, a cylindrical bottom cylindrical portion 4b that has the above-described inner peripheral wall 16 that extends upward from the bottom wall 6 and forms the rotation space of the rotary table 8, and A conical cylinder portion 4c having an annular inclined surface 20 extending at an angle θ1 (in FIG. 3, 30 ° in the present embodiment) from the inner peripheral wall 16 toward the inner upper side of the storage tank 4 above the measuring chamber 10; A cylindrical main container part 4d extending upward from the upper end of the conical cylinder part 4c and a top plate part 4e for closing the upper end of the main container part 4d are provided. The top plate portion 4e is formed with a pair of loading ports 4f and 4f for loading the contents.

  The end on the inner peripheral wall 16 side of the inclined surface 20 of the conical cylinder portion 4c is positioned substantially on the same plane as the upper surface of the scraping plate 18. The grinding plate 18 will be described in detail later in relation to the measuring chamber 10.

  The bottom cylindrical portion 4 b of the storage tank 4 is provided with an injection nozzle 24 connected to an external pressurized air source 22 for injecting pressurized air into the measuring chamber 10 located in the discharge area D. The injection nozzle 24 is attached so as to inject pressurized air from the upper opening 10 a side of the measuring chamber 10 located below the scraping plate 18 toward the lower opening 10 b and the discharge port 12.

  The turntable 8 includes a disk-shaped main body 8a and a plurality (12) of partition plates 8b erected radially at a predetermined interval in the circumferential direction of the periphery of the main body 8a. The pair of adjacent partition plates 8b and 8b cooperate with the inner peripheral wall 16 of the storage tank 4 to define the measuring chamber 10 having the upper opening 10a and the lower opening 10b.

  A hollow boss 8b is provided in the center of the main body 8a, and a drive shaft 28 connected to an electric motor (not shown) provided in the storage tank installation base 26, which causes the boss 8b to rotationally drive the rotary table 8, is provided. It is connected.

  The measuring chamber 10 is formed by gradually expanding the opening cross section from the upper opening 10a toward the lower opening 10b. That is, as shown in FIG. 3, the outer periphery of the main body 8a is formed on a slope inclined inward of the turntable 8 at an angle θ2 (10 ° in the present embodiment) downward, and the partition plate 8b. As shown in FIG. 4, both sides of the plate thickness are inclined at an angle θ3 (3 ° in the present embodiment) in the direction in which the plate thickness decreases toward the lower side.

  The rotary table 8 also includes a plurality of (three in the present embodiment) blades 30 arranged radially on the upper surface thereof toward the inclined surface 16 in the horizontal direction. As shown in FIG. 5, the blade plate 30 is formed of an angle member having an L-shaped cross section, and is provided on the upper surface of the turntable 8 with the vertical side 30 a of the angle being the rear side in the rotation direction 14 of the turntable 8. Attached to the circular base 32.

  The aforementioned scraping plate 18 is formed in an arc shape so as to close the upper opening 10a of the measuring chamber 10 by about two above the discharge port 12. And the end (upper end in FIG. 2) that sequentially closes the upper opening 10a in the predetermined rotation direction 14 is such that the inner wall 16 side of the upper opening 10a is closed first and the inner side is gradually closed. It is defined by an inclined line in a plan view (FIG. 2). The other end of the scraping plate 18 is defined by a straight line extending in the direction in which the partition plate 8 b of the turntable 8 extends.

  The operation of the table feeder 2 configured as described above will be described.

(1) Continuous and quantitative supply of contents:
When the rotary table 8 is rotated in the predetermined direction 14, the storage material filled in the storage tank 4 from the charging port 4 f flows into the weighing chamber 10 closed by the lower opening 10 b in the introduction region R from the upper opening 10 a. When the metering chamber 10 reaches the part of the scraping plate 18, the upper opening 10a is also closed. Next, in the discharge area D, the lower opening 10 b is opened to the discharge port 12, and the contents introduced into the measuring chamber 10 are discharged to the discharge port 12. The empty weighing chamber 10 from which the contents are discharged moves again to the introduction area R, the upper opening 10a is opened, and the contents are introduced and introduced. Therefore, by defining the number of rotations of the turntable 8 and the volume of the measuring chamber 10, the contents such as the granular material accommodated in the storage tank 4 are continuously and quantitatively discharged from the discharge port 12 and supplied to the supply destination. To be supplied.

(2) Supply of refractory substances:
The table feeder 2 is provided with an annular inclined surface 20 extending from the inner peripheral wall 16 toward the inner upper side of the storage tank 4 above the measuring chamber 10, and on the upper surface of the rotary table 8 in a horizontal direction toward the inclined surface 20. A radial vane 30 is provided. Then, a container having poor fluidity is pushed out toward the inclined surface 20 by the blade plate 30 that rotates together with the rotary table 8, and is pushed toward the lower measuring chamber 10 by the inclined surface 20. Therefore, it is possible to continuously and quantitatively supply a hardly flowable material such as waste plastic crushed material.

  Further, since the end of the scraping plate 18 that sequentially closes the upper opening 10a of the measuring chamber 10 in the rotation direction 14 is formed so as to gradually close the upper opening 10a from the inner peripheral wall 16 side, the contents are fixed in this portion. Is prevented. Further, since the end of the inclined surface 20 on the inner peripheral wall 16 side is positioned substantially on the same plane as the upper surface of the scraping plate 18, the space above the measuring chamber 10 is reduced, so that the contents are prevented from sticking in this portion. The And since the measuring chamber 10 was gradually expanded from the upper opening 10a toward the lower opening 10b to expand its cross section, and pressurized air was injected into the measuring chamber 10 in the discharge area D. A difficult-flowing substance such as a product can be smoothly discharged to the discharge port 12.

  As described above, the present invention has been described in detail based on the embodiment. However, as shown in FIG. 6, the cylindrical main container portion 4 d extending upward from the conical cylinder portion 4 c having the annular inclined surface 20 is provided on the way. Alternatively, the cylindrical diameter may be increased to provide a large-diameter main container portion 4g to increase the storage space for the stored items, and the stirring blades 36 may be provided in this portion by the support columns 34 erected on the rotary table 8.

Sectional drawing which looked at the table feeder comprised according to this invention from the side. FIG. 2 is a plan view cross-sectional view of the table feeder as seen in the direction of arrows AA in FIG. 1. The enlarged view of the principal part of FIG. The expanded sectional view of the partition plate of the rotary table shown in the BB arrow direction of FIG. FIG. 4 is an enlarged cross-sectional view of a slat attached to the rotary table shown in the direction of arrows CC in FIG. 3. Sectional drawing which showed other embodiment of the table feeder.

Explanation of symbols

2: Table feeder 4: Storage tank 8: Rotary table 10: Weighing chamber 10a: Upper opening 10b: Lower opening 12: Discharge port 16: Inner peripheral wall 18: Ground plate (blocking plate)
20: Inclined surface 24: Injection nozzle 30: Blade plate R: Introduction area D: Discharge area

Claims (1)

A storage tank, and a rotary table that is rotatably disposed in the storage tank;
The rotary table includes a plurality of weighing chambers having an upper opening for receiving the contents in the storage tank and a lower opening for discharging the received contents at intervals in the circumferential direction,
Each of the weighing chambers is moved through the introduction area and the discharge area along the inner peripheral wall of the storage tank by rotating the rotary table in a predetermined direction, and the upper opening is opened and the lower opening is opened in the introduction area. A table feeder that is closed and has an upper opening closed in the discharge area and a lower opening opened to a discharge port formed in the storage tank,
The storage tank is provided with a conical cylinder portion having an annular inclined surface extending from the inner peripheral wall toward the inner upper side of the storage tank above the weighing chamber,
The rotary table includes a plurality of blades arranged radially on the upper surface toward the inclined surface ,
Table feeder housing of the reservoir is pushed out toward the inclined surface by the vane which rotates together with the rotary table, Ru pushed toward the metering chamber below the inclined surface, characterized in that.

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