JP5816023B2 - Metering device - Google Patents

Description

  The present invention relates to a quantitative supply device for supplying a granular material at a stable supply rate (a supply amount per unit time).

  2. Description of the Related Art Conventionally, a quantitative supply device is known in which a granular material is filled in an annular recess formed on a rotary table, and the granular material in the annular recess is scraped by a scraper.

  For example, the quantitative supply device described in Patent Documents 1 and 2 scrapes out the container in which the powder is accommodated, the rotary table having an annular recess filled with the powder, and the powder in the annular recess. And a scraper. The rotary table is rotatably arranged such that a part of the annular recess is located inside the container and the remaining part is located outside the container. Thereby, the granular material inside a container is filled in the annular recessed part of a rotary table, and is conveyed outside a container. The granular material conveyed to the outside of the container is scraped out by the scraper from the annular recess toward the chute located outside the rotary table. The granular material scraped out from the annular recess to the chute by the scraper is supplied to a desired place.

Japanese Utility Model Publication No. 5-85435 Japanese Utility Model Publication No. 63-1819

  By the way, in the case of the fixed-quantity supply apparatus described in patent document 1 and 2, the granular material is filled into the annular recessed part of a turntable with the side wall of the container on a turntable. That is, the granular material is ground by the inner surface of the side wall of the container and fills the annular recess without overflowing the annular recess.

  At this time, in the case of a granular material that tends to be agglomerated when densely gathered, the granular mass is formed including a part of the granular material in the annular recess of the rotary table, and the mass is inside the side wall of the container. When it is ground by the surface, an unfilled portion in which no granular material exists in the annular recess may occur. In this case, the granular material is conveyed to the outside of the container by the rotation of the rotary table in a small state. Naturally, since the granular material is not completely filled in the annular recess, the scraped amount of the granular material of the scraper is reduced. As a result, the fixed amount supply device cannot supply the granular material at a constant supply rate.

  Then, even if it is a granular material which is easy to become a lump when gathering densely, this invention makes it a subject to stabilize the supply speed | rate of the granular material uniformly.

  In order to solve the above-described problem, according to the first aspect of the present invention, there is provided a quantitative supply device for supplying a granular material at a stable supply rate, a container for accommodating the granular material, and a powder The rotary table has an annular groove filled with granules on the upper surface, and the rotary table can be rotated so that a part of the annular groove is located inside the container and the remaining part of the annular groove is located outside the container. In the portion of the side wall of the container where the annular groove of the turntable faces the outside of the container, the powder particles in the container are ground into the annular groove by extending in the moving direction of the annular groove and toward the annular groove. There is provided a metered supply device further comprising a scraping member having an inclined surface to be filled.

  According to the 2nd aspect of this invention, the fixed supply apparatus as described in a 1st aspect whose inclined surface of a grinding member is a curved surface convex on the container inside side is provided.

  According to the third aspect of the present invention, the grinding member is a roller that rotates about a rotation center line extending in a direction intersecting the moving direction of the annular groove, and the outer peripheral surface of the roller scrapes the powder fluid. The fixed-quantity supply apparatus as described in a 2nd aspect is provided.

  According to a fourth aspect of the present invention, there is provided the quantitative supply device according to the third aspect, wherein the roller is arranged such that the outer peripheral surface is in contact with the upper surface of the rotary table and is rotated by the rotation of the rotary table. Is done.

  According to the 5th aspect of this invention, the fixed_quantity | feed_rate supply apparatus as described in the 3rd or 4th aspect with which the roller is urged | biased toward the turntable by the urging | biasing means is provided.

  According to the present invention, the powdered fluid inside the container is less likely to be agglomerated by being scraped by the scraping member having an inclined surface extending toward the annular groove in the moving direction of the annular groove, and the annular groove Surely charged inside. As a result, the quantitative supply device can supply the granular material at a constant supply rate.

The figure which shows schematically a part of structure of the fixed quantity supply apparatus which concerns on one embodiment of this invention. AA line sectional view of FIG. BB sectional view of FIG. The figure for explaining the role of the roller which is a grinding member The figure which shows another grinding member roughly The figure which shows another another grinding member roughly Furthermore, the figure which shows the different grinding member schematically

  FIG. 1 schematically shows a part of the configuration of a quantitative supply device according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.

  As shown in FIG. 1, the quantitative supply device 10 includes a cylindrical container 12 that stores powder particles, a rotary table 14 that includes an annular recess (annular groove) filled with the particles, and powder in the annular groove. It has a scraper 16 that scrapes out the particles, and a chute 18 that collects the powder particles scraped out by the scraper 16.

  The cylindrical container 12 is a cylindrical container, and accommodates powder particles therein.

  The rotary table 14 is a disk-shaped table, and is connected to a rotary shaft 20 that rotates about a rotation center line C2 parallel to the center line C1 of the cylindrical container 12. The rotation center line C2 of the turntable 14 extends in the vertical direction, for example. The rotating shaft 20 is rotationally driven at a constant rotational speed via a gear (not shown), for example, by a motor (not shown). As the rotary shaft 20 rotates, the rotary table 14 rotates.

  The turntable 14 also includes an annular groove 14b formed on its upper surface 14a so as to go around the rotation center line C2. As shown in FIG. 2, the annular groove 14b is formed as a recess having a semicircular cross section. As shown in FIG. 1, the annular groove 14b can also be an outer peripheral side upper surface portion 14a ′ sandwiched between the peripheral edge 14c and the annular groove 14b along the peripheral edge 14c of the upper surface 14a of the turntable 14. The rotary table 14 is formed so as to have the smallest area as much as possible. This is because part of the powder particles scraped from the annular groove 14b by the scraper 16 is less likely to remain on the outer peripheral upper surface portion 14 '.

  Further, the surface of the annular groove 14b of the rotary table 14 is finished to a surface roughness that suppresses slipping of the powder particles filled in the annular groove 14b. If demonstrating it, as shown in FIG. 3, the fixed quantity supply apparatus 10 is comprised so that the granular material with which it filled in the annular groove 14b with rotation of the turntable 14 may hit the scraper 16 (it acts). Therefore, due to the reaction of the scraper 16, the granular material filled in the annular groove 14b is integrally moved relative to the annular groove 14b in the direction opposite to the rotation direction R1 of the rotary table 14, that is, in the annular groove 14b. There is a possibility of sliding.

  As a countermeasure, the surface in the annular groove 14b is finished so that the granular material does not move relative to the annular groove 14b in the direction opposite to the rotation direction R1 of the turntable 14. For example, the surface of the annular groove 14b is finished by sand blasting, shot blasting, or the like. Thereby, the granular material filled in the annular groove 14b is stably conveyed toward the scraper 16 by the rotary table 14 without sliding in the annular groove 14b integrally.

  The rotary table 14 rotates to the cylindrical container 12 such that a part of the annular groove 14b is located inside the cylindrical container 12 and the remaining part of the annular groove 14b is located outside the cylindrical container 12. It is attached as possible. In the case of the present embodiment, as shown in FIG. 1 and FIG. 2, the turntable 14 is cylindrical so that a part of the bottom surface 12 a of the cylindrical container 12 constitutes a part of the top surface 14 a of the turntable 14. Attached to the container 12.

  By rotating the rotary table 14, the powder particles in the cylindrical container 12 are filled in the annular groove 14 b of the rotary table 14 and conveyed toward the scraper 16 outside the cylindrical container 12. .

  In order to reliably fill the granular material in the annular groove 14 b of the rotary table 14, the fixed amount supply device 10 includes an agitator 22 and a roller 24.

  The agitator 22 is provided on the bottom surface 12 a of the cylindrical container 12. The agitator 22 includes a plurality of blades 22a. The plurality of blades 22a are attached to the rotating shaft 22b. The rotating shaft 22b rotates around the center line C1 of the cylindrical container 12, and is rotated through a gear (not shown) by a motor (not shown) that rotationally drives the rotating shaft 20 of the rotating table 14, for example. The table 14 is rotationally driven at a predetermined reduction ratio. The plurality of blades 22a are disposed on the bottom surface 12a of the cylindrical container 12, and move on the bottom surface 12a of the cylindrical container 12 while rotating around the center line C1 by the rotation of the rotating shaft 22b.

  Such an agitator 22 can agitate the powder particles in the cylindrical container 12. Moreover, when the granular material which tends to become a lump when it gathers densely is accommodated in the container 12, the agitator 22 also plays the role which isolate | separates a lump-like granular material separately. If it demonstrates, the granular material near bottom face 12a of cylindrical container 12 will receive the dead weight of the granular material located in the upper part, and will be easy to become a lump. Therefore, the blades 22a of the agitator 22 separate the bulk particles near the bottom surface 12a of the cylindrical container 12 so that the powder particles are not filled in the annular groove 14b of the turntable 14 in a lump state. .

  The roller 24 is a cylindrical rotating body, and is supported by the cylindrical container 12 so that it can freely rotate and its outer peripheral surface 24 a faces the annular groove 14 b of the rotary table 14. Specifically, as shown in FIG. 1, the annular groove 14 b going from the inside to the outside of the cylindrical container 12 faces the annular groove 14 b of the turntable 14 at a portion of the side wall 12 b of the container 12 that passes below. And the roller 24 is accommodated in the recess 12c.

  The roller 24 is also arranged so that the rotating direction of the roller 24 and the moving direction of the annular groove 14b are the same in the facing region between the outer peripheral surface 24a and the annular groove 14b of the turntable 14. Further, the roller 24 is made of a material to which the powder particles are difficult to adhere, for example, a plastic material, or the outer peripheral surface 24a is finished with a surface roughness to which the powder particles are difficult to adhere. By this roller 24, the granular material is ground and filled in the annular groove 14b.

  The reason why the roller 24 functioning as a scraping member is used will be described with reference to FIG.

  FIG. 4A shows the flow of the granular material that flows along with the rotation of the turntable 14. FIG. 4A shows a case where the granular material is ground not by the roller 24 but by the inner surface of the side wall 12 b of the cylindrical container 12.

  As shown in FIG. 4A, the granular material flows with the rotation of the rotary table 14, and the granular material is the side wall 12b of the cylindrical container 12 through which the annular groove 14b of the rotary table 14 passes below. Gather in the part. That is, the granular material is concentrated in the vicinity of the outlet of the cylindrical container 12 communicating with the outside.

  At this time, if the powder particles are likely to be agglomerated when gathered densely, and when the powder particles are ground by the inner surface of the side wall 12b of the cylindrical container 12, as shown in FIG. There is a possibility that a mass M of the granular material is formed. As shown in FIG. 4A, the lump M is formed so as to include a part of the granular material in the annular groove 14b of the turntable 14, and the lump M is a side wall as shown in FIG. 4B. If it moves along the inner surface of 12b, the unfilled part E in which a granular material does not exist in the annular groove 14b will generate | occur | produce. If such an unfilled portion E occurs accidentally and intermittently, the amount of the granular material conveyed toward the scraper 16 becomes unstable. As a result, the scraping amount of the powder particles of the scraper 16 is not stable, and the quantitative supply device 10 becomes difficult to quantitatively supply the powder particles.

  The phenomenon that the unfilled portion E of the granular material is formed in the annular groove 14b of the turntable 14 as shown in FIG. 4B (that is, the phenomenon that the granular mass L is formed) is a cylindrical container. This is likely to occur when the granular material is ground by a surface standing at an angle of about 90 degrees with respect to the upper surface 14a of the turntable 14, such as the inner surface of the twelve side walls 12b. That is, the flow of powder particles substantially parallel to the upper surface 14a generated by the rotation of the turntable 14 collides with the inner surface of the side wall 12b at an angle of about 90 degrees, and the powder particles are formed in the annular groove 14b and the side wall 12b. Therefore, the powder fluid lump M tends to be generated. Therefore, in the present embodiment, the granular material is ground by the outer peripheral surface 24a of the roller 24 which is a curved surface extending toward the moving direction R1 of the annular groove 14b and toward the annular groove 14b.

  The roller 24 has at least one of both ends in the width direction of the outer peripheral surface 24a at the upper surface 14a of the rotary table 14 (specifically, at least one of the outer peripheral side upper surface portion 14a ′ or the central side upper surface portion 14a ″). It is arrange | positioned so that it may contact. Thereby, the granular material is filled in the annular groove 14b up to the upper surface 14a of the turntable 14. Further, the rotational speed of the roller 24 is set to be the same as the rotational speed of the rotary table 14 (the peripheral speed in the annular groove 14b). As a result, it is possible to prevent the powder particles filled in the annular groove 14b from sliding together in the annular groove 14b.

  If it demonstrates, in the opposing area | region of the roller 24 and the annular groove 14b, it is the state by which the granular material filled in the annular groove 14b was pinched | interposed into the roller 24 and the annular groove 14b. Therefore, when the rotational speed of the roller 24 is slower than the moving speed of the annular groove 14b of the turntable 14, a high speed gradient may occur in the granular material in the annular groove 14b on the deep side of the annular groove 14b. When this velocity gradient becomes too large, there is a possibility that the shallow granular material slides in the direction opposite to the rotation direction R1 of the turntable 14 with respect to the deep granular material of the annular groove 14b. Alternatively, there is a possibility that the powder particles in the annular groove 14b may slide together with respect to the annular groove 14b.

  When both ends of the outer peripheral surface 24 a of the roller 24 are in contact with the upper surface 14 a of the turntable 14, the roller 24 is formed in a truncated cone shape, and the diameter of the center side of the turntable 14 is outside the turntable 14. It is preferable to arrange it so as to be smaller than the diameter. The reason is that the peripheral speed of the rotary table 14 increases as it goes from the center to the outside. Thereby, the roller 24 can rotate smoothly.

  In order to maintain contact between the outer peripheral surface 24a of the roller 24 and the upper surface 14a of the turntable 14, the roller 24 is applied toward the turntable 14 by a biasing means such as a spring 26, as shown in FIG. Preferably.

  Furthermore, when there is no possibility that the powder particles are integrated and slip with respect to the annular groove 14b of the turntable 14 (for example, when the surface of the annular groove 14b is sufficiently blasted as described above), the roller 24 is The size that can be accommodated in the annular groove 14b, that is, the width of the outer peripheral surface 24a may be narrower than the width in the annular groove 14b. However, in this case, the roller 24 is not urged toward the bottom in the annular groove 14b by the urging means such as the spring 26 (if the urging means is used, the granular material in the annular groove 14b is pressed and hardened. Become).

  As shown in FIG. 2, the scraper 16 has, for example, a spherical shape, and rotates so that a part of the scraper 16 is positioned within the annular groove 14 b of the rotary table 14 positioned outside the cylindrical container 12. It is configured.

  Specifically, the scraper 16 is disposed so that a minute gap is formed between the surface of the annular groove 14 b of the turntable 14. The reason is that if the scraper 16 is in contact with the annular groove 14b, the rotation table 14 and the scraper 16 may be prevented from rotating at a stable rotational speed, and at least one of the scraper 16 or the annular groove 14b is worn. Because there is a fear. If there is no such fear, for example, if the friction generated between the scraper 16 and the rotary table 14 is extremely small, the scraper 16 can rotate even if the surface of the annular groove 14b and the scraper 16 come into contact with each other. Good.

  The scraper 16 is attached to the tip of a rotating rod 16a that rotates about the rotation center line C3 in order to rotate. The rotating rod 16a is driven to rotate by, for example, a motor (not shown).

  The rotation direction R2 of the scraper 16 that rotates about the rotation center line C3 is such that the powder particles in the annular groove 14b of the turntable 14 are moved outside the turntable 14, that is, outside the turntable 14, as shown in FIG. It is set in a direction that can be scraped toward the chute 18 disposed in the position.

  Specifically, as shown in FIG. 1, when viewed in the direction of the rotation center line C <b> 2 of the rotary table 14, the scraping direction S of the powder particles of the scraper 16 is determined by the tangential direction component St and the radial direction component of the rotary table 14. When divided into Sr, the tangential direction component St in the scraping direction S is preferably the same as the rotation direction R1 of the turntable 14. This is because when the tangential component St of the scraper 16 in the powder scraping direction S is opposite to the rotation direction R1 of the rotary table 14, the scraper 16 is directed to the scraper 16 by the powder scraped by the scraper 16 and the rotary table 14. This is because the powder and particles conveyed collide with each other and the powder and particles do not come out smoothly from within the annular groove 14b.

  For this purpose, the rotation center line C3 of the scraper 16 (rotating rod 16a) has a rotation table relative to the tangential direction of the rotation table 14 when viewed in the direction of the rotation center line C1 of the rotation table 14, as shown in FIG. 14 is inclined at an angle α. Thereby, a granular material is scraped out smoothly toward the chute | shoot 18 from the inside of the annular groove 14b. The angle α may be zero (in this case, the granular material is scraped in the radial direction of the turntable 14).

  Further, the rotation center line C3 of the scraper 16 is located on the downstream side of the rotation direction R1 of the turntable 14 when viewed from the radially outer side to the center side of the turntable 14 as shown in FIG. Is inclined by an angle β with respect to the upper surface 14a (annular groove 14b). As shown in FIG. 2, the scraper 16 rotates so that the surface of the scraper 16 moves outward from the center side of the rotary table 14 in a region facing the annular groove 14 b.

  It is preferable that the inclination angle β of the rotation center line C3 of the scraper 16 is small. When the inclination angle β is small, the granular material of the rotary table 14 can be surely scraped from the bottom of the annular groove 14b at the surface portion of the scraper 16 having a high peripheral speed (that is, the surface portion away from the rotation center line C3).

  In addition, the inclination angle β of the rotation center line C3 of the scraper 16 is an angle of 90 degrees or more, that is, the rotation center line C3 is upstream of the rotation direction R1 of the turntable 14 unless the granular material contacts the rotation rod 16a. It may be inclined. However, in this case, the rotation direction of the scraper 16 is opposite to the case where the rotation center line C3 is inclined downstream.

  Furthermore, in order to improve the scraping property of the powder particles of the scraper 16, a plurality of concave portions or a plurality of convex portions may be formed on the surface of the scraper 16. A groove or dimple may be formed as the recess. However, it is necessary to prevent clogging of the granular material in the concave portion or between the convex portions. For example, when a groove is formed on the surface of the scraper 16, it is preferable that the groove has an open end so that the granular material inside the groove reliably comes out of the groove when the scraper 16 rotates.

  According to such a scraper 16, the powder particles in the annular groove 14 b of the rotary table 14 are scraped out from the annular groove 14 b of the rotary table 14 toward the chute 18 by the rotation of the scraper 16. Therefore, the granular material cannot remain in the scraper 16. In other words, the powder particles are not gathered densely in the scraper 16, and the powder particles are suppressed from being agglomerated by the scraper 16. As a result, the scraping amount of the granular material per unit time of the scraper 16 is stabilized, and the quantitative supply device 10 can supply the granular material at a stable supply speed.

  As shown in FIG. 1 and FIG. 3, when the scraper 16 scrapes out the granular material, the granular material spilled on the outer peripheral side upper surface portion 14 a ′ and the central upper surface portion 14 a ″ of the rotary table 14 is again cylindrical. The fixed amount supply apparatus 10 is configured to return to the inside of the container 12.

  To explain, the scraper 16 does not scrape all the powder particles filled in the annular groove 14 b of the rotary table 14 toward the chute 18. A small part of the granular material conveyed toward the scraper 16 spills on the outer peripheral side upper surface portion 14a ′ and the central upper surface portion 14a ″ of the rotary table 14 when the scraper 16 scrapes the granular material, or It is left behind in the annular groove 14b.

  Note that the amount of powder particles spilling on the outer peripheral side upper surface portion 14a ′ and the central side upper surface portion 14a ″ of the rotary table 14 and the amount of powder particles remaining in the annular groove 14b are almost stable. The stability of the scraping amount of the granular material per unit time to the chute 18 of the scraper 16, that is, the stability of the quantitative supply of the granular material of the quantitative supply device 10 is ensured.

  The granular material left in the annular groove 14 b by the scraper 16 is returned to the cylindrical container 12 as it is by the rotation of the rotary table 14.

  On the other hand, the powder particles spilled on the outer peripheral side upper surface portion 14a ′ and the central upper surface portion 14a ″ of the rotary table 14 when the scraper 16 scrapes the powder particles are shown in FIG. 1 and FIG. Then, it passes through the tunnel portion 12 d of the cylindrical container 12 and is returned into the cylindrical container 12.

  The tunnel portion 12d is formed in a portion of the side wall 12b of the cylindrical container 12 through which the annular groove 14b of the rotary table 14 from the outside to the inside of the cylindrical container 12 passes below.

  The tunnel portion 12d also includes an outer opening 12e formed on the outer surface of the cylindrical container 12 and an inner opening 12f formed on the inner surface, as shown in FIGS. It extends along 14a and along the annular groove 14b. Further, as shown in FIG. 1, the tunnel portion 12 d has a predetermined granular material through which spilled particles can pass on the outer peripheral side upper surface portion 14 a ′ of the turntable 14 and in the vicinity of the annular groove 14 b of the central upper surface portion 14 a ″. It has a ceiling height (height from the upper surface 14a of the turntable 14) and a width.

  As shown in FIG. 1 and FIG. 2, the center-side upper surface portion 14a '' of the turntable 14 is covered so that a large amount of powder particles are not placed on the center-side upper surface portion 14a '' of the turntable 14. A guide member 26 for dropping the granular material is provided in the annular groove 14b.

  Further, as shown in FIG. 3, the tunnel portion 12d of the cylindrical container 12 has a cross-sectional area on the inner surface of the cylindrical container 12, that is, an opening area of the inner opening 12f is equal to a cross-sectional area on the outer surface, that is, the outer opening 12e. It is preferable that it is formed so as to be smaller than the opening area. Thereby, it is suppressed that the granular material accommodated in the cylindrical container 12 flows out outside via the tunnel part 12d.

  In order to further suppress the outflow of the granular material through the tunnel portion 12d, the tunnel portion 12d is preferably longer. Therefore, you may extend the tunnel 12d part to the vicinity of the scraper 16e.

  The reason for using such a tunnel part 12d is demonstrated.

  When the tunnel portion 12d does not exist, the granular material spilled on the outer peripheral side upper surface portion 14a ′ and the central upper surface portion 14a ″ of the rotary table 14 when the scraper 16 scrapes the granular material is the cylindrical container 12. Cannot be returned to the inside of the cylindrical container 12. Therefore, the granular material is between the outer peripheral side upper surface portion 14 a ′ of the cylindrical rotary table 14 and the outer surface of the cylindrical container 12, and between the central upper surface portion 14 a ″ and the outer surface of the cylindrical container 12. accumulate.

  The granular material deposited between the outer peripheral side upper surface portion 14a ′ of the turntable 14 and the outer surface of the cylindrical container 12, and between the central upper surface portion 14a ″ and the outer surface of the cylindrical container 12, Each time the turntable 14 makes one rotation, the amount of deposition increases. When the amount of accumulation increases to some extent, a part of the granular material overflows in the annular groove 14b and the outside of the rotary table 14. When a part of the accumulated granular material overflows the annular groove 14b located on the upstream side of the scraper 16 with respect to the rotation direction R1 of the rotary table 14, the amount of the granular material conveyed to the scraper 16 becomes unstable. . In addition, when it overflows outside the rotary table 14, there is a possibility that it enters the chute 18. In any case, the stability of the powder supply of the quantitative supply device 10 is impaired.

  As a countermeasure, by providing the cylindrical portion 12d with the tunnel portion 12d, the space between the outer peripheral side upper surface portion 14a 'of the cylindrical rotary table 14 and the outer surface of the cylindrical container 12, the central upper surface portion 14a' 'and the cylinder The granular material is prevented from being deposited between the outer surface of the cylindrical container 12.

  According to the quantitative supply device 10 as described above, the granular material accommodated in the cylindrical container 12 is filled in the annular groove 14b of the rotating table 14 during rotation.

  The granular material filled in the annular groove 14 b inside the cylindrical container 12 is conveyed toward the scraper 16 located outside the cylindrical container 12 by the rotation of the rotary table 14.

  The granular material conveyed to the outside of the cylindrical container 12 is scraped out toward the chute 18 by the rotating scraper 16. The granular material scraped to the chute 18 is conveyed to a desired place.

  On the other hand, the granular material in the annular groove 14 b left by the scraper 16 is returned to the inside of the cylindrical container 12 by the rotation of the rotary table 14. On the other hand, when the scraper 16 scrapes off, the powder particles spilled on the outer peripheral upper surface portion 14a ′ and the central upper surface portion 14a ″ of the rotary table 14 pass through the tunnel portion 12d and enter the cylindrical container 12. Returned.

  According to the present embodiment, the powder in the cylindrical container 12 is ground by the roller 24 having the outer peripheral surface 24a as an inclined surface extending toward the moving direction R1 of the annular groove 14b and toward the annular groove 14b. The fluid is less likely to clump and is reliably filled into the annular groove 14b. As a result, the quantitative supply device 10 can supply the granular material at a constant supply rate.

  Although the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  For example, in the case of the above-described embodiment, in the portion of the side wall 12 b of the cylindrical container 12 where the annular groove 14 b of the rotary table 14 faces the outside of the cylindrical container 12, the roller 24 grinds the powder particles to form the annular groove. 14b is filled, but the present invention is not limited to this.

  For example, as shown in FIG. 5, the annular groove 14b of the turntable 14 is formed on the side wall 112b of the cylindrical container 112 facing the outside of the cylindrical container 112 toward the moving direction R1 of the annular groove 14b and the annular groove 14b. An inclined surface 124 extending toward the top may be formed. Alternatively, as shown in FIG. 6, a curved surface 224 that is convex on the inner side of the cylindrical container 212 may be formed on the side wall 212b. The powder particles in the cylindrical containers 112 and 212 can smoothly flow along the inclined surface 124 and the curved surface 224 toward the annular groove 14b and the side walls 112b and 212b, and are ground by the inclined surface 124 and the curved surface 224. Thus, the annular groove 14b is filled. In this case, it is preferable to smoothly form the inclined surface 124 and the curved surface 224 to reduce the friction with the granular material. In this case, the side walls 112b and 212b on which the inclined surface 124 and the curved surface 224 are formed function as a scraping member.

  Further, for example, as shown in FIG. 7, a scraping sheet 324 made of a flexible material (for example, a resin) may be used as a scraping member that fills the annular groove 14b by grinding powder particles. One end of the ground sheet 324 is in contact with the upper surface 14 a of the turntable 14, and the other end is fixed to the side wall 312 b of the cylindrical container 312. The ground sheet 324 grinds the granular material in the cylindrical container 312 and fills the annular groove 14b while maintaining contact with the rotary table 14 while being convexly curved inside the cylindrical container 312.

  The present invention is not limited to powders and the like that are likely to be agglomerated, such as wheat flour, but also can be quantitatively supplied to powders and the like having high fluidity such as salt. It can be applied to the fixed quantity supply apparatus.

10 Metering device 12 Container (cylindrical container)
14 Rotary table 14a Top surface 14b Annular groove 24 Grinding member (roller)
24a Inclined surface (outer peripheral surface)

Claims (3)

A quantitative supply device for supplying powder particles at a stable supply speed,
A container for containing powder,
A rotary table provided on the upper surface with an annular groove filled with powder,
The rotary table is rotatably arranged so that a part of the annular groove is located inside the container and the remaining part of the annular groove is located outside the container,
In the portion of the container side wall where the annular groove of the rotary table faces the outside of the container, the inclined surface extends in the moving direction of the annular groove and toward the annular groove and fills the annular groove by grinding the powder particles in the container. further have a level-off member comprising a,
The inclined surface of the ground member is a curved surface convex toward the inside of the container,
A fixed- quantity supply device in which a grinding member is a roller that rotates about a rotation center line that extends in a direction that intersects the direction of movement of the annular groove, and the outer peripheral surface of the roller grinds powder particles . The quantitative supply device according to claim 1 , wherein the roller is disposed such that an outer peripheral surface thereof is in contact with an upper surface of the rotary table, and is rotated by rotation of the rotary table. The fixed-quantity supply apparatus of Claim 1 or 2 with which the roller is urged | biased toward the turntable by the urging means.

Images