JP5075249B2 - Powder and particle feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder and granular material metering system for preventing a failure by powder and granular material scattering without being stored in a powder and granular material vessel. <P>SOLUTION: In this powder and granular material metering system 100, a falling route of the powder and granular material between a metering bottle 99 and a powder and granular material supply device 90 is covered with a recovering hood 80, and the inside of the recovering hood 80 is sucked by the suction pump 85 while the powder and granular material is supplied from the powder and granular material supply device 90. Thus, even if a part of the powder and granular material discharged downward from the powder and granular material supply device 90 swerves from the falling route and remains in the recovering hood 80, the unnecessary powder and granular material can be sucked and removed from the inside of the recovering hood 80. This prevents the powder and granular material from falling on an electronic balance 60, its periphery, and the outer surface of the metering bottle 99, and can prevent a metering error or a failure of the electronic balance 60. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a granular material supply device capable of discharging a granular material downward.

  2. Description of the Related Art Conventionally, a system is known in which a granular material is weighed by a predetermined amount in a granular material container placed on an electronic balance (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2003-90756 ([0009], FIG. 1)

  By the way, in such a system, there is a problem of how to stably supply a certain amount of the granular material to the granular material container, and development of a new granular material supply device has been demanded.

  This invention is made | formed in view of the said situation, and aims at provision of the granular material supply apparatus which can supply a granular material stably each fixed amount.

The granular material supply apparatus according to the invention of claim 1 made to achieve the above object is a cylindrical granular material supply container containing the granular material, and is held at the center of the granular material supply container. And a ceiling wall in the container that has an annular space between the inner surface of the powder supply container and is opposed to the bottom wall of the powder supply container from above, and a bottom wall of the powder supply container A granular material discharge cylinder having a granular material discharge hole hanging from the center of the portion covered with the ceiling wall in the container and communicating with the granular material supply container inside, and provided in the granular material discharge cylinder The particulate discharge is provided on the closed wall having a plurality of granular material passage holes that can be closed by the granular material arch formed by adhering the granular materials and the bottom wall of the granular material supply container. Powder that surrounds the hole and flows down from the annular space to the bottom of the ceiling wall in the container can be accumulated as a pile of particles with an angle of repose It is arranged between the body accumulation surface and the ceiling wall and bottom wall in the container, and is driven to rotate around the powder discharge hole, and the powder is discharged to the powder discharge hole while breaking the powder pile. A bottom turning member for guiding the upper end wall, an upper end wall provided at the upper end of the powder supply container, and a pipe-like first rotation that is rotatably supported by the upper end wall and penetrates the ceiling wall in the container A drive shaft, a second rotation drive shaft that is inserted inside the first rotation drive shaft and protrudes downward from the first rotation drive shaft from the lower end portion, and the first rotation drive shaft and the second rotation drive shaft are separately provided. In the powder and granular material supply device including a pair of drive sources capable of being driven, the bottom surface turning member is a first bottom surface turning member fixed to the lower end portion of the first rotation drive shaft so as to be integrally rotatable. , Disposed below the first bottom pivot member, and the second rotational drive system. And a second bottom surface turning member fixed to the lower end of the shaft so as to be integrally rotatable. The second bottom surface turning member is formed on the first bottom surface turning member and extends into the granular material discharge cylinder. Formed on the first powder arch crushing arm and the second bottom surface swivel member for turning and applying external force to the powder arch and forcibly dropping the powder from the particle passage hole below the closed wall Is extended into the granular material discharge cylinder, and the upper part of the closed wall of the granular material discharge cylinder is swirled inside the swirl region of the first granular material arch crushing arm to give external force to the granular material arch, A second granule arch crushing arm for forcibly dropping the granule from the granule passage hole below the blocking wall, and making the second bottom surface turning member thinner than the first bottom surface turning member, The area of the swivel region at the lower end of the second granular arch crushing arm is defined as the lower end of the first granular arch crushing arm. It is characterized in that it is configured to be smaller than the area of the swivel region of the part .

The invention according to claim 2 is characterized in that, in the powder / particle supply apparatus according to claim 1 , the ceiling wall in the container is fixed to the first rotation drive shaft so as to be integrally rotatable.

The third aspect of the present invention is the powder or granular material supply device according to the first or second aspect , wherein the ceiling wall in the container is formed in a disc shape, and is fixed to the granular material supply container, on the upper surface of the ceiling wall in the container. It has a feature in that an upper surface standby guide for guiding the accumulated granular material to the annular space is provided.

The invention according to claim 4 is characterized in that, in the powder and particle supply device according to claim 2 , the inside wall of the container has a conical shape whose diameter is increased downward.

The invention of claim 5 is the powder supply device according to any one of claims 1 to 4 , wherein the powder supply device is formed in a state of projecting or sinking on the powder deposit surface, with the powder discharge hole as the center. It has a feature in that it is provided with a bottom spiral guide that is curved in a spiral shape and is guided by the bottom surface turning member to guide the granular material moving on the granular material deposition surface to the granular material discharge hole.

A sixth aspect of the invention is characterized in that, in the powder and granular material supply device according to the fifth aspect , the bottom spiral guide is any one of an involute curve, a logarithmic spiral curve, and an Archimedean spiral curve.

[Invention of Claim 1]
According to the invention of claim 1, the granular material flows down from the annular gap between the inner wall of the container and the inner surface of the granular material supply container held in the granular material supply container, It accumulates on the bottom wall of the granular material supply container and becomes a granular particle pile having an angle of repose between the ceiling wall and the bottom wall in the container. Since the annular gap is blocked by the granular material pile, the granular material is not normally discharged from the granular material discharge hole.

And if a bottom turning member is rotated, a bottom turning member will guide a granular material to a granular material discharge | emission hole, breaking a granular material pile. In addition, as soon as the powder pile is broken, the powder is supplied from the annular gap to form a new powder pile, so that the powder is removed only while the bottom turning member is swung. It can be dropped into the body discharge cylinder.

  The granular material dropped on the granular material discharge cylinder closes the granular material discharge hole formed in the closed wall in the granular material discharge cylinder by the granular material arch formed by adhering the granular materials. Then, when the bottom turning member rotates, the powder arch crushing arm rotates in the powder discharge cylinder, and external force is applied to the powder arch to form the powder arch. Forcibly drop from the grain passage hole to the lower end wall. That is, the granular material can be discharged downward from the granular material supply device only while the bottom surface turning member is turned.

Here, according to the present invention, as the bottom surface turning member, the first bottom surface turning member and the second bottom surface turning member are provided so as to overlap each other, and they can be driven separately, so that the bottom surface turning to be rotated. Depending on the number of members, the amount of the granular material discharged from the granular material discharge hole can be adjusted. And since the 2nd bottom face turning member was made thinner than the 1st bottom face turning member, the 2nd bottom face turning member can discharge a granular material little by little from the 1st bottom face turning member.

Further, as the powder arch crushing arm, a first powder arch crushing arm formed on the first bottom turning member and a swivel region of the first powder arch crushing arm formed on the second bottom turning member. A second granule arch crushing arm that swirls inside, and the area of the swirl region at the lower end of the second granule arch crush arm is the area of the swirl region at the lower end of the first granule arch crush arm Since it was made smaller, the 2nd granular material arch crushing arm can make the quantity of the granular material discharged | emitted from the granular material passage hole per rotation smaller than the 1st granular material arch crushing arm.

  For example, when weighing a relatively large amount of powder particles, the first bottom surface turning member and the second bottom surface turning member are simultaneously swirled to quickly discharge a large amount of powder particles, and a relatively small amount of powder material is discharged. When the particles are weighed, excessive supply is prevented by turning only one of the first bottom face turning member and the second bottom face turning member.

  Further, when measuring a predetermined weight of the granular material, at a stage far from the predetermined weight, the first bottom surface turning member and the second bottom surface turning member are simultaneously swirled to supply a large amount of the granular material. If it approaches, the 1st bottom face turning member will be stopped, only the 2nd bottom face turning member will be turned, and a granular material will be supplied little by little. Thereby, the granular material of predetermined weight can be measured accurately and rapidly.

  Moreover, according to this invention, the drive source which rotates a bottom turning member can be arrange | positioned outside a granular material supply container.

[Invention of claim 2 ]
According to the second aspect of the present invention, the granular material can be agitated by allowing the ceiling wall in the container to rotate integrally with the first rotation drive shaft.

[Invention of claim 3 ]
According to the invention of claim 3 , when the rotary drive shaft rotates and the ceiling wall in the container rotates integrally, the granular material placed on the ceiling wall in the container is guided to the outer edge side by the upper surface standby guide, and from the annular gap Flow down.

[Invention of claim 4 ]
According to the invention of claim 4 , the granular material slides down the slope of the cone and flows downward from the annular gap due to its own weight, so that the granular material placed on the ceiling wall in the container is guided toward the annular gap. There is no need for additional components.

[Inventions of Claims 5 and 6 ]
If the flowability of the powder is low, the powder may not be induced even if the bottom turning member rotates. On the other hand, according to the fifth aspect of the present invention, when the bottom swirling member rotates on the powder volume surface and passes the bottom swirl guide, the bottom swirling member and the bottom swirl guide cooperate with each other. Since the granular material is moved to the center side, even a granular material having low fluidity can be smoothly guided to the granular material discharge hole. Here, only one or a plurality of bottom spiral guides may be provided. As in the sixth aspect of the invention, the bottom spiral guide is more effective when it is any one of an involute curve, a logarithmic spiral curve, and an Archimedes spiral curve.

The fragmentary sectional view of the granular material measuring system concerning a 1st embodiment of the present invention. Side cross-sectional view of a granular drum with a pile of granular particles formed on the bottom wall Cross-sectional perspective view of powder drum Cross section of powder drum Perspective view of container holder Cross section of windshield and collection hood Perspective view of windshield and collection hood Top view of clamp arm Partial cross-sectional view of powder supply device Cross section of powder discharge cylinder (A) Perspective view of a perforated plate, (B) Perspective view of a modification thereof (A) Perspective view of upper scraper, (B) Perspective view of lower scraper Cross section of powder drum (A) Side sectional view of the discharge cylinder part, (B) A view showing a turning region of the turning leg part. Cross-sectional perspective view of a powder and granular material supply apparatus according to a second embodiment (A) Plan view of bottom wall and scraper according to other embodiments (2) and (3), (B) Cross section, (C) Cross section of modification A perspective view of a scraper according to another embodiment (4) Sectional drawing of the granular material discharge cylinder which concerns on other embodiment (5).

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1-14.
FIG. 1 shows the whole of a granular material measuring system 100 provided with the granular material supply device 90 of the present invention. As shown in the figure, the granular material measuring system 100 includes an electronic balance 60 below the granular material supply device 90, and a weighing bottle 99 placed on the electronic balance 60 has a predetermined weight. It is the composition which measures a granular material.

  First, the granular material supply apparatus 90 will be described. The granular material supply device 90 discharges the granular material downward from the lower surface of the granular material drum 10 containing the granular material.

As shown in FIG. 2, the powder drum 10 has a cylindrical structure with a diameter reduced stepwise toward the bottom. Specifically, it includes a powder supply container 11 having a bottom end and a powder discharge cylinder 12 projecting vertically downward from the center of the bottom wall 11A of the powder supply container 11, and these communicate with each other. doing. And the granular material accommodated in the granular material supply container 11 falls below (measuring bottle 99) through the granular material discharge hole 12A which penetrated the axial part of the granular material discharge cylinder 12. FIG .

As shown in FIG. 10 , a perforated plate 30 (corresponding to a “blocking wall” in the present invention) is mounted at an intermediate position in the vertical direction of the granular material discharge hole 12 </ b> A in the granular material supply device 91. Perforated plate 30 is a punched metal plurality of granular material passage hole 30A is formed through the thin disk as shown in Figure 11 (A). The granular material passage hole 30 </ b> A is closed by a granular arch formed by adhering the granular materials when the granular materials are deposited on the porous plate 30 to form a granular pile. At the same time, the granular material arch is collapsed so that the granular material can pass through. In other words, the granular material passage hole 30A has a size several to ten times larger than the particle size of the granular material. Further, since the optimum size of the granular material passage hole 30A varies depending on the properties of the granular material and the like, a plurality of types of perforated plates 30 having different sizes of the granular material passage hole 30A are prepared ( FIG. 11 ( B)), the perforated plate 30 suitable for the granular material can be selected and replaced before the granular material measuring system 100 is used. The perforated plate 30 may use a woven mesh or an extended metal.

As shown in FIG. 10 , the perforated plate 30 is held by a pair of holding cylinders 31, 31 inserted and fitted inside the granular material discharge cylinder 12 with its outer edge portion sandwiched from above and below. In order to prevent the holding cylinders 31 from being detached from the granular material discharge cylinder 12, a retaining cap 32 is screwed onto the outside of the granular material discharge cylinder 12, and the bottom wall of the retention cap 32 is held. The cylinders 31, 31 are supported from below. A male spiral portion 32A is formed on the outer peripheral surface of the retaining cap 32, and the lower end opening of the granular material discharge hole 12A can be sealed by screwing a closed cap 33 with a bottom at the bottom. It has become. That is, the powder drum 10 can be used as a powder container.

  A male spiral portion 10 </ b> A is formed on the outer peripheral surface of the upper end of the powder drum 10. On the other hand, a holding cap 13 is integrally provided on a bracket 19 (see FIG. 1) for holding the powder drum 10 at an upper position of the measuring bottle 99. The holding cap 13 is provided with a male spiral. By screwing the part 10 </ b> A, the upper end opening of the powder drum 10 is closed and the powder drum 10 is held by the bracket 19. That is, the granular material drum 10 can be attached to and detached from the bracket 19. The bracket 19 can be expanded and contracted in the vertical direction, and the holding position of the powder drum 10 can be adjusted up and down according to the height of the measuring bottle 99.

  An input port (not shown) is formed in the upper end wall 13 </ b> A of the holding cap 13. The charging port is provided unevenly at a position shifted from the center of the upper end wall 13A of the screw cap, and the granular material can be supplied into the granular material drum 10 from the charging port.

As shown in FIG. 9 , two supply motors 14, 15 are provided in the center of the upper end wall 13 </ b> A of the holding cap 13 so as to overlap each other. The rotational drive shafts 14A and 15A of the supply motors 14 and 15 extend through the upper end wall 13A along the central axis in the powder drum 10 (specifically, the powder supply container 11). Further, the rotation drive shaft 14A (corresponding to the “first rotation drive shaft” of the present invention) of the lower supply motor 14 has a pipe structure (specifically, a hexagonal cylinder structure) open at both ends. The rotation drive shaft 15A of the supply motor 15 (corresponding to the “second rotation drive shaft” of the present invention) protrudes downward through the inside of the rotation drive shaft 14A. And both rotation drive shaft 14A, 15A can be rotated relatively.

  Scrapers 121 and 22 are attached to the lower ends of the rotary drive shafts 14A and 15A, respectively. These scrapers 121 and 22 are disposed in the vicinity of the bottom wall 11A of the granular material supply container 11, and rotate in horizontal planes parallel to each other.

As shown in FIG. 3, the inside of the granular material supply container 11 is provided with an in-container ceiling wall 38 and an upper surface standby guide 39. The container inner ceiling wall 38 is a flat disk having a diameter smaller than the inner diameter of the granular material supply container 11 and larger than the inner diameter of the granular material discharge hole 12A, and is mounted horizontally above the scraper 121. (See FIG. 2). The container ceiling wall 38 has a hexagonal hole (not shown) at the center and is fitted to the outside of the rotary drive shaft 14A, and rotates integrally with the scraper 121 . Then, when the container ceiling wall 38 is attached and the powder is introduced into the powder supply container 11 from the inlet (not shown) of the holding cap 13, the powder is deposited on the container ceiling wall 38. To do.

  On the other hand, the upper surface standby guide 39 is provided in order to scrape the granular material on the ceiling wall 38 in the container to the edge side when the ceiling wall 38 in the container turns. The upper surface standby guide 39 includes a horizontal plate 39A disposed adjacent to the upper surface of the inner ceiling wall 38, and a vertical plate that extends vertically upward from the base end of the horizontal plate 39A and is fixed to the upper end wall 13A of the holding cap 13. The plate 39B is constituted.

Then, by attaching the flat surface of the horizontal plate 39A to the side surface of the rotational drive shaft 14A of the supply motor 14, the horizontal plate 39A is inclined with respect to the rotational direction of the inner ceiling wall 38, and the dotted line in FIG. As indicated by the arrows, the granular material on the in-container ceiling wall 38 is guided by the horizontal plate 39A and pushed out toward the edge of the in-container ceiling wall 38. Further, the base end portion of the horizontal plate 39A extends to a position adjacent to the inner peripheral surface 11C of the granular material supply container 11, and the extruded granular material is connected to the peripheral edge portion and inner peripheral surface of the container inner ceiling wall 38. It flows down on the bottom wall 11A of the granular material supply container 11 from the annular gap 40 between the surface 11C. Further, the upper surface standby guide 39 can agitate the granular material in the granular material supply container 11 to prevent the granular material from solidifying or clogging. Thereby, it becomes possible to make the granular material at the upper part of the ceiling wall 38 in the container flow stably onto the bottom wall 11A.

As shown in FIG. 2, the powder that has flowed down to the bottom wall 11 </ b> A of the powder supply container 11 forms a pile of powder fluid between the in-container ceiling wall 38 and the bottom wall 11 </ b> A. The angle of repose α1 of this granular material mountain is constant depending on the granular material, and the granular mountain becomes a “weir” so that excessive granular material is not supplied from the upper side of the inner ceiling wall 38 to the bottom wall 11A. Can be. That is, the annular gap 40 formed between the peripheral edge of the ceiling wall 38 in the container and the inner peripheral surface 11C of the powder supply container 11 is blocked by the powder pile, and the powder is not discharged. The ceiling wall 38 in the container and the bottom wall 11 </ b> A of the granular material supply container 11 can be brought close to each other so that excessive powder particles are not supplied. The upper surface of the bottom wall 11A corresponds to the “powder particle deposition surface” in the present invention .

As shown in FIG. 12 (A), the upper scraper 121 corresponds to the powder collecting blades 23 in the form of cantilever beams laterally from the disk-shaped shaft center plate 25 (the “first bottom surface turning member” of the present invention). ) And dust wings 24 are extended. A hexagonal hole 25A is formed in the shaft center plate 25, and a lower end portion of the rotational drive shaft 14A is fitted therein.

As shown in FIG. 13 , the powder collection blade 23 has a bent structure in which a plurality of flat plates are connected so as to swell on the opposite side to the rotation direction (the direction of the solid line arrow in FIG. 13 ), while the dust collection blade 24 is a powder particle. The body drum 10 extends straight in the radial direction. Further, the dust collection blade 23 extends to a position where the tip thereof is adjacent to the inner peripheral surface 11C of the granular material supply container 11, and the dust distribution blade 24 is shorter than that.

  Then, the powder particles on the bottom wall 11 </ b> A are guided to the center side by the powder material guide surface 23 </ b> A provided in the powder collection blades 23 and are taken into the powder particle discharge cylinder 12. The powder particles excessively taken in by the wings 23 are moved to the outside to escape, and when the powder collection wings 23 pass next, it is easy to stabilize the pressure of the powder particles in the taken-up powder material supply container 11. In addition, the dust collection blades 23 and the dust collection blades 24 cooperate to stir the powder particles, and also have an effect of crushing the lump of the powder particles. Furthermore, when the granular material is a mixture of two or more types of granular material, the degree of mixing of the two types of granular material can be increased by repeating this accumulation and dispersion.

Here, the auxiliary guide wall 20 is integrally formed at the proximal end portion of the powder collection blade 23. The auxiliary guide wall 20 is inclined so as to gradually descend toward the guiding direction of the granular material by the granular material guide surface 23A (the direction of the dotted arrow in FIG. 13 ). The auxiliary guide wall 20 receives the granular material that has moved to the proximal end portion of the powder collection blade 23 by the granular material guide surface 23A and guides the granular material obliquely downward, and within the granular material discharge cylinder 12 ( It is dropped into the powder body discharge hole 12A).

On the other hand, as shown in FIG. 12B , the lower scraper 22 has a flat plate shape that is thinner than the upper scraper 121, and rotates while being in sliding contact with the upper surface of the bottom wall 11A. The scraper 22 has cantilever-shaped powder collection blades 27 (corresponding to the “second bottom surface turning member” of the present invention) extended laterally from a disk-shaped shaft center plate 26 fixed to the rotary drive shaft 15A. It has a structure.

The powder collection blade 27 has the same planar shape as the powder collection blade 23 provided in the scraper 121 in the axial direction, and has a bent structure that swells on the opposite side to the rotation direction (the direction of the solid line arrow in FIG. 13 ). There is no. When the scraper 22 rotates, the granular material is guided from the edge side of the bottom wall 11 </ b> A toward the center side by the granular material guide surface 27 </ b> A of the powder collection blades 27 facing forward in the rotation direction. It should be noted that the amount of powder particles that each powder collection blade 23, 27 guides to the powder discharge cylinder 12 per rotation is less for the powder collection blade 27 than for the powder collection blade 23.

As shown in FIGS. 12 (A) and 12 (B), swiveling leg portions 28 and 29 protrude vertically downward from the shaft center plates 25 and 26 of the scrapers 121 and 22, respectively. As shown in FIG. 10, it is inserted inside the powder particle discharge cylinder 12 (the powder particle discharge hole 12A).

The swivel leg portion 28 provided in the scraper 121 is suspended from the outer edge portion of the shaft center plate 25, and has a substantially L shape with its lower end portion bent at a right angle toward the center of rotation. Of the swivel legs 28, the vertical piece 28A swirls in the vicinity of the inner peripheral surface of the granular material discharge hole 12A (specifically, the inner peripheral surface of the holding cylinder 31) as the scraper 121 rotates (see FIG. 14) . ). Thereby, the granular material adhering to the inner peripheral surface of the granular material discharge hole 12A due to static electricity or the like can be scraped off.

  Further, the horizontal piece 28 </ b> B at the lower end of the swivel leg 28 swirls in the vicinity of the upper surface of the perforated plate 30 as the scraper 121 rotates. Thereby, the granular material arch formed in the radially outward portion of the porous plate 30 can be broken, and the granular material can be dropped from the granular material passage hole 30A.

On the other hand, as shown in FIG. 12 (B), the swivel leg portion 29 provided in the lower scraper 22 is provided so as to protrude to the side of the axial center plate 26 and extends to the vicinity of the upper surface of the perforated plate 30. (See FIGS. 9 and 10 ). The turning leg 29 turns inside the turning area of the turning leg 28 as the scraper 22 rotates (see FIG. 14 ). Thereby, the granular material arch formed in the center part of the perforated plate 30 can be broken and dropped from the granular material passage hole 30A. That is, most of the granular material arch formed on the porous plate 30 can be broken by the two swivel legs 28 and 29.

Here, as shown in FIG. 14B , the area of the swivel region of the horizontal piece 28B of the swivel leg 28 is larger than the area of the swivel region at the lower end of the swivel leg 29. The amount of the granular material passing through 30 is larger in the swivel leg 28, that is, the scraper 121, than in the swivel leg 29, that is, the scraper 22. The swivel leg 28 corresponds to the “first powder arch crush arm” of the present invention, and the swivel leg 29 corresponds to the “second powder arch crush arm” of the present invention.

As shown in FIG. 15 , the inside of the granular material supply container 11 in the granular material drum 10 is provided with an in-container ceiling wall 38 and an upper surface standby guide 39. The in-container ceiling wall 38 is attached horizontally above the scraper 121 (see FIG. 9 ). Further, the container inner ceiling wall 38 is fitted to the outside of the rotational drive shaft 14 </ b> A and rotates integrally with the upper scraper 121.

  The above is description regarding the structure of the powder supply apparatus 91, and operation | movement of the powder supply apparatus 91 is demonstrated below.

  When a granular material is introduced into the granular material drum 10 from the granular material introduction hole, the granular material is temporarily deposited on the ceiling wall 38 in the container. When the supply motor 14 is driven, the container inner ceiling wall 38 rotates, and the upper surface standby guide 39 guides the granular material on the container inner ceiling wall 38 toward the edge. Flows into the bottom wall 11 </ b> A from the annular gap 40 between the portion and the inner peripheral surface 11 </ b> C of the granular material supply container 11.

Since this granular material forms a granular particle pile having a predetermined angle of repose α1 of the powder fluid between the ceiling wall 38 and the bottom wall 11A of the container, the granular material flowing into the bottom wall 11A flows as it is. Thus, the particles are not discharged from the particulate discharge hole 12A (see FIG. 2 ).

When the scrapers 121 and 22 are rotated by driving the supply motors 14 and 15, the powder collection blades 23 and 27 guide the powder particles from the edge side of the bottom wall 11 </ b> A to the center while destroying the powder fluid piles. incorporated 12 (only the scraper 121 is shown in Figure 13 reference. Figure 13).

  In addition, as soon as the powder pile is scraped off, the powder flows in from the annular gap 40, and a new powder pile is formed between the in-container ceiling wall 38 and the bottom wall 11A.

  The granular material taken into the granular material discharge cylinder 12 by the scrapers 121 and 22 is deposited on the porous plate 30 to form a granular particle crest, and the granular material arch in which the granular materials adhere to each other. The granular material passage hole 30A is closed. This granular material arch is collapsed by receiving external force from the swivel legs 28 and 29 that rotate inside the granular material discharge hole 12A together with the scrapers 121 and 22, and passes through the granular material passage hole 30A little by little. Further, the granular material adhering to the inner peripheral surface of the granular material discharge hole 12 </ b> A due to static electricity or the like is scraped off by the swivel leg 28 that rotates around the inner peripheral surface of the granular material discharge hole 12 </ b> A together with the scraper 121.

In order to reliably receive the powder discharged downward from the powder supply device 90 as described above with the measurement bottle 99, the weighing pan 61 of the electronic balance 60 in the powder measurement system 100 is provided with a figure. As shown in FIG. 1, a container holder 62 is fixedly placed. As shown in FIG. 5 , the container holder 62 includes a U-shaped wall 63 opened to one side (right direction in FIG. 1) of the granular material measuring system 100, and one side of the granular material measuring system 100. The measuring bottle 99 can be inserted and removed by moving horizontally from the side. Then, by fitting the lower part of the measuring bottle 99 in the back of the U-shaped wall 63, the measuring bottle 99 is positioned vertically below the granular material discharge hole 12A and falls directly below the granular material supply device 90. It is possible to accept the powder.

As shown in FIG. 1, a box-shaped windshield 70 is installed on the upper surface of the electronic balance 60. As shown in FIG. 6 , the windshield 70 is fixedly placed on a flat lower windshield case 71 covering the entire weighing pan 61 and a top plate 71 </ b> A of the lower windshield case 71 and placed on the electronic balance 60. It is comprised from the upper stage windshield case 72 which covers the side and upper direction of the measurement bottle 99. FIG.

  A holder insertion port 73 is formed through the top plate 71 </ b> A of the lower windshield case 71 directly above the weighing pan 61, and the container holder 62 fixedly placed on the weighing pan 61 extends from the holder insertion port 73 to the upper stage. Projecting into the windshield case 72.

  The upper windshield case 72 can accommodate the measuring bottle 99 placed on the container holder 62, and the top plate 72 </ b> B is arranged adjacent to the upper surface of the measuring bottle 99 slightly apart. In the top plate 72B, at a position facing the upper surface opening of the measuring bottle 99 placed on the container holder 62 and at a position directly below the powder discharge cylinder 12 (powder discharge hole 12A) in the powder drum 10. Is formed with a circular top plate opening 72A through which the powder discharged from the powder supply device 90 passes. In addition, a container carry-in port 74 for taking in and out the measuring bottle 99 is formed in a container surrounding wall 72 </ b> C surrounding the side of the measuring bottle 99 placed on the electronic balance 60 in the upper windshield case 72. The container carry-in port 74 has a horizontally long rectangular shape and is open to one side (right direction in FIG. 1) of the granular material measuring system 100.

As shown in FIG. 7 , the container carry-in port 74 can be closed by an opening / closing plate 75. The open / close plate 75 has a horizontally-long rectangular plate shape from the container carry-in port 74, and a base plate 76 projects from the lower side of the open / close plate 75 toward the front side of the granular material measuring system 100. A clamp arm 78 for gripping the measuring bottle 99 is attached to the vertical wall 77 rising from the upper surface of the platform 76. The clamp arm 78 is formed by, for example, welding a base end portion of a pair of flexible arms 78A and 78A formed by bending a metal wire to both surfaces of the vertical wall 77. As shown in FIG. It extends in the horizontal direction. A horizontally long arm insertion hole 75A (see FIG. 7 ) is formed through the opening / closing plate 75, and the flexible arms 78A and 78A are inserted therethrough. Further, as shown in FIG. 8 , the distal ends of both flexible arms 78A, 78A are curved in a semicircular arc shape in accordance with the side surface shape of the measuring bottle 99, and are always attached so that the distal ends thereof are opened. It is energized. Then, by grasping the proximal end portion of the clamp arm 78 with respect to the opening / closing plate 75, the distal ends of the flexible arms 78A and 78A are closed so that the measuring bottle 99 can be clamped. The clamp arm 78 is not limited to the one operated by hand, and may be configured to automatically open and close by a driving device (not shown).

When the weighing bottle 99 is gripped by the clamp arm 78 and the clamp arm 78 is moved forward (moved upward in FIG. 8 ) toward the container entrance 74 of the upper draft shield case 72, it passes through the vertical wall 77 and the base plate 76. Thus, the opening / closing plate 75 integrated with the clamp arm 78 also moves forward toward the container carry-in port 74. When the measuring bottle 99 gripped by the tip of the clamp arm 78 is positioned in contact with the back of the U-shaped wall 63, the open / close plate 75 contacts the peripheral edge of the container carry-in port 74 to carry in the container. The mouth 74 is closed. Thereby, the inside of the upper windshield case 72 is brought into a windless state.

Further, in order to take out the measuring bottle 99 from the upper draft shield case 72, when the measuring bottle 99 is gripped by the clamp arm 78 and the clamp arm 78 is retracted (moved downward in FIG. 8 ) from the container carry-in port 74, the opening / closing plate 75 is provided. Is separated from the container carrying-in port 74 to one side, and the container carrying-in port 74 is opened. In this way, the weighing bottle 99 can be taken in and out of the upper draft shield case 72 by the clamp arm 78 and the container carry-in port 74 can be opened and closed by the opening and closing plate 75 in one operation.

  Note that reference numeral 102 in FIG. 1 denotes a static eliminator (specifically, an ionizer). The static eliminator 102, for example, measures the charge and potential inside the upper windshield case 72 and irradiates ions in the upper windshield case 72 with charges and potential ions that are offset (neutralized). Remove static electricity from the powder and the measuring bottle 99. Thereby, malfunction (for example, display fluctuation) of electronic balance 60 can be prevented, and electronic balance 60 can be stabilized. The static eliminator 102 can irradiate the ions even during measurement of the powder particles (while the powder particle supply device 90 is discharging the powder particles).

By the way, if the granular material supply device 90 (specifically, the granular material drum 10) and the measuring bottle 99 are in contact with each other, an error occurs in the measured value. Must be separated from each other in the vertical direction (see FIG. 6 ). Therefore, when a granular material with a light specific gravity or a highly dispersed granular material is discharged from the granular material drum 10 toward the measuring bottle 99 below, a part of the discharged granular material falls directly below. May scatter to the side without.

  On the other hand, in the granular material measuring system 100 of this embodiment, the collection hood 80 is fixedly placed on the top plate 72B of the upper windshield case 72. And by the collection | recovery hood 80 and the top plate 72B of the upper stage windshield case 72, the granular material of the granular material between the lower end part of the granular material discharge cylinder 12 in the granular material drum 10 and the top plate opening 72A of the top plate 72B is obtained. The falling path is covered, and the granular material that has been scattered from the falling path of the granular material to the side is prevented from leaking out of the collection hood 80. The powder particles in the collection hood 80 can be sucked and removed from the collection hood 80 by the suction pump 85.

  Specifically, a circular hole 81 is formed through the center of the top plate 80 </ b> A of the collection hood 80, and the lower end portion of the powder discharge cylinder 12 in the powder drum 10 is inserted. A plurality of air intakes 82 are formed at predetermined positions on the top plate 80 </ b> A and the side wall 80 </ b> B of the collection hood 80. Further, an unnecessary powder and granular material suction port 83 is formed in the side wall 80B separately from the air intake port 82, and a suction pump 85 is connected to the connecting tube portion 84 projecting laterally from the peripheral edge of the unnecessary powder and granular material suction port 83. (See FIG. 1) can be connected.

  This completes the description of the configuration of the present embodiment. Next, the effect of this embodiment is demonstrated. When measuring a predetermined weight, for example, 10 mg of powder particles into the measuring bottle 99, the following operation is performed. First, the measuring bottle 99 is gripped by the distal end portion of the clamp arm 78 by grasping the proximal end portion of the clamp arm 78, and in this state, the clamp arm 78 is moved forward toward the container carry-in port 74 of the upper windshield case 72. The measuring bottle 99 is inserted into the inside. At this time, the base plate 76 slides on the top plate 71 </ b> A of the lower windshield case 71, and the opening / closing plate 75 approaches the container carry-in port 74. When the measuring bottle 99 hits the inner part of the U-shaped wall 63 in the container holder 62, the measuring bottle 99 is arranged vertically below the granular material discharge hole 12A, and the container carry-in port 74 is blocked by the opening / closing plate 75. The upper windshield case 72 is closed. After releasing the hand from the clamp arm 78 and holding the measuring bottle 99 on the container holder 62, the operation unit (not shown) of the electronic balance 60 is operated to perform taring (the display is set to zero).

Next, while confirming the measurement value of the electronic balance 60, the supply motors 14 and 15 are rotated to supply powder particles. That is, the two scrapers 121 and 22, that is, the two swivel legs 28 and 29 are rotated on the perforated plate 30 until the measured value reaches 10 mg (for example, 9 mg). The formed powder arch is almost completely destroyed to discharge a relatively large amount of the powder, and 9 mg or more of the powder is quickly measured. Next, before the measured value reaches 10 mg, that is, when the measured value becomes 9 mg or more, the rotation of one supply motor 14 is stopped and only the other supply motor 15 is rotated. That is, the turning of the turning leg portion 28 is stopped, and only the turning leg portion 29 is turned on the perforated plate 30. Thereby, only the granular material arch formed in the center part of the perforated plate 30 is destroyed, and the granular material is supplied little by little, and the measured value can be gradually brought closer to 10 mg. Then, when the measured value reaches 10 mg, the rotation of the supply motor 15 is stopped. Thereby, 10 mg of a granular material can be measured accurately and rapidly. The measurement value of the electronic balance 60 may be fed back to a control device (not shown) to automatically turn on / off the supply motors 14 and 15 and adjust the rotation speed .

  Now, when dropping powder from the powder supply device 90, most of the powder falls vertically, passes through the top opening 72A of the upper windshield case 72, and is accommodated in the measuring bottle 99. Some of the granular materials may not be dropped vertically due to the influence of an air current or the like and may be displaced to the side, and may not enter the measuring bottle 99. This granular material does not leak to the outside of the collection hood 80, but floats inside the collection hood 80 or falls on the top plate 72B. In this embodiment, the suction pump 85 is operated during the supply of the granular material from the granular material supply device 90 in order to immediately remove the granular material in the collection hood 80. Then, unnecessary powder particles floating in the collection hood 80 or falling on the top plate 72 </ b> B are sucked and removed to the outside of the collection hood 80. At this time, the granular material moving in the collection hood 80 does not affect the measurement value of the electronic balance 60.

  Thus, according to the granular material measuring system 100 of the present embodiment, the dropping path of the granular material between the measuring bottle 99 and the granular material supplying device 90 is covered with the collection hood 80, and the granular material supplying device 90 is covered. The suction hood 80 sucks the inside of the collection hood 80 while the powder and granular materials are being supplied. Thereby, even if a part of the powder discharged downward from the powder supply device 90 deviates from the dropping path and remains in the collection hood 80, the unnecessary powder is removed from the collection hood 80. Can be removed by suction. Thereby, it can prevent that a granular material falls on the electronic balance 60, its circumference | surroundings, and the outer surface of the measurement bottle 99, and can prevent a measurement error and the failure of the electronic balance 60. Moreover, even when measuring the granular material classified into poisonous and deleterious substances, the measuring bottle 99 can be handled safely.

  Further, the powder hood 80 is sucked in the collection hood 80 while the powder and granules are being supplied from the powder supply device 90 (that is, during measurement), and the particles floating in the collection hood 80 are removed. Therefore, the next measurement can be started immediately after the measurement is completed. Therefore, compared with the case where the measurement of the powder and the suction in the collection hood 80 are performed separately, the work of weighing the powder into the plurality of measurement bottles 99 can be performed efficiently.

  Moreover, since the collection | recovery hood 80 and the upper stage windshield case 72 which accommodated the measurement bottle 99 are partitioned by the top plate 72B above the measurement bottle 99, the upper stage windshield case accompanying the suction | inhalation inside the collection hood 80 The fluctuation of the airflow in 72 can be suppressed. Thereby, when the inside of the collection | recovery hood 80 is attracted | sucked during discharge of a granular material, it can prevent that the measurement error by the fluctuation | variation of an airflow arises.

  Further, an air intake 82 is formed in the collection hood 80, and since air is taken in from the outside of the collection hood 80 during suction, suction is performed while the measuring bottle 99 is housed in the windshield 70 (upper windshield case 72). In this case, it is possible to prevent the powder particles accommodated in the measuring bottle 99 from being released.

[ Second Embodiment]
FIG. 15 shows a second embodiment of the present invention. This 2nd Embodiment differs in the structure of the granular material supply apparatus 92 from the said 1st Embodiment.

The container inner ceiling wall 138 provided on the inner side of the powder drum 10 is expanded in diameter downward, and an annular gap 40 is formed between the lower end edge and the inner peripheral surface 11C of the powder supply container 11. It has a conical cylindrical shape. And the granular material thrown in from the granular material throwing hole which is not shown in the upper end wall 13A of the holding cap 13 slides down on the slope of the ceiling wall 138 in the container under its own weight (see FIG. 15 ), and the annular gap 40 flows into the bottom wall 11A. And the granular material which flowed into 11 A of bottom walls forms the granular material peak which has the angle of repose α1 between the ceiling wall 138 in a container, and 11 A of bottom walls. Since other configurations are the same as those in the first embodiment, the same reference numerals are given to the same configurations, and duplicate descriptions are omitted.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In order to prevent malfunction (display fluctuation) of the electronic balance 60 due to heat generated from the electronic balance 60, an air conditioner or a fan for stabilizing the temperature inside the lower windshield case 71 may be provided. Further, in the environment where there is no change in the temperature of the outside air as in the case where the powder particle measuring system 100 is installed in a temperature-controlled room, the lower windshield case 71 may be provided with a vent hole that is not affected by the wind. .

(2) In the second embodiment, the current powder wings 23 and 27 in the scraper 121,22 had no bent structure, as shown in FIG. 16 (A), clockwise in the direction of rotation (FIG. 16 (A) It may be rounded and curved so as to swell in the direction opposite to the rotation direction.

(3) Also, as shown in FIGS. 16A and 16B, the upper surface of the bottom wall 11A of the powder supply container 11 is rounded so as to swell in the rotational direction of the scrapers 121 and 22. A plurality of spirally curved grooves 111 (logarithmic spiral curves, Archimedean spiral curves) or involute curved grooves 111 may be provided. Thereby, the powder collection feathers 23 and 27 and the groove | channel 111 cooperate, and guide a granular material toward 12 A of granular material discharge holes efficiently. Note that, as shown in FIG. 16C , the same effect can be obtained by providing the protrusion 112 in place of the groove 111. These grooves 111 and ridges 112 correspond to the “bottom spiral guide” according to the present invention. Alternatively, a part of the spiral curve or involute curve may be replaced with a straight line.

(4) As shown to FIG. 17 (A), you may make it the structure which excluded the dust blade 24 from the upper scraper 121 in 1st Embodiment. Further, as shown in FIG. 17B , a structure in which dust wings 110 are provided on the lower scraper 22 may be adopted.

(5) In the said 1st Embodiment, you may arrange | position the position of the porous plate 30 in 12 A of granular material discharge holes in the position near the lower end of 12 A of granular material discharge holes , as shown in FIG. Then, when the perforated plate 30 is disposed near the lower end of the granular material discharge hole 12A, the swivel legs 28 and 29 in the first embodiment may be extended vertically downward.

(6) The collection hood 80 accommodates only the lower end portion of the granular material discharge cylinder 12 in the granular material drum 10, but accommodates the entire granular material supply device or the entire granular material drum 10. It may be.

(7) For example, when supplying a granular material into gas to generate dust of a predetermined concentration, the dust concentration is measured, and the powder discharged from the granular material supply device from the dust concentration by a calibration curve or the like You may obtain | require the weight of a granule.

(8) In the above embodiment, the weighing bottle 99 is placed on the electronic balance 60, and the weight of the powder contained in the measurement bottle 99 is measured. The weight of the entire supply device may be constantly measured, and the decrease in the weight of the powder supply device accompanying the discharge of the powder may be measured as the weight of the powder contained in the measurement bottle 99. In this way, it is possible to save the trouble of taring each time the measuring bottle 99 is replaced, and it is possible to efficiently weigh powder particles into the plurality of measuring bottles 99.

DESCRIPTION OF SYMBOLS 11 Powder supply container 11A Bottom wall 12 Powder discharge cylinder 12A Powder discharge hole 13A Upper end wall 14A Rotation drive shaft (1st rotation drive shaft)
15A rotary drive shaft (second rotary drive shaft)
23 Powder collection feather (first bottom turning member)
27 Flour collection blade (second bottom turning member)
28 Rotating leg (first granule arch crushing arm)
29 Rotating leg (second powder arch crushing arm)
30 perforated plate (blocking wall)
30A granular material passage hole 38 ceiling wall in container 39 upper surface standby guide 40 annular gap 60 electronic balance 62 container holder 72 upper windshield case 72A top plate opening 72B top plate 72C container surrounding wall 74 container carry-in port 75 opening / closing plate 75A arm insertion hole 78A, 78A Flexible arm 80 Recovery hood 82 Air intake 83 Unnecessary powder suction port 85 Suction pump 90 , 92 Powder supply device 99 Measuring bottle 100 Powder measurement system 102 Static eliminator 111 Groove (bottom spiral guide) )
112 ridge (bottom spiral guide)
138 Ceiling wall in container

Claims (6)

A cylindrical powder supply container capable of accommodating the powder;
While being held at the center of the powder supply container and having an annular space between the inner surface of the powder supply container and being opposed to the bottom wall of the powder supply container from above A ceiling wall in the container;
Particulate discharge with a part discharge hole that is suspended from the center of the bottom wall of the part supply container and covered with the ceiling wall in the part and communicated with the part supply container inside A tube,
A closed wall provided with a plurality of granular material passage holes which are provided in the granular material discharge cylinder and can be closed by a granular material arch formed by adhering the granular materials;
The granular material provided on the bottom wall of the granular material supply container, surrounding the periphery of the granular material discharge hole, and flowing down from the annular space below the ceiling wall in the container has an angle of repose. A powder accumulation surface that can be accumulated as a powder pile;
It is arranged between the container inner ceiling wall and the bottom wall, and is rotationally driven around the powder particle discharge hole, and the powder particle discharge hole while breaking the powder pile. A bottom pivot member that guides to
An upper end wall provided at an upper end portion of the powder and granular material supply container;
A pipe-shaped first rotation drive shaft that is rotatably supported by the upper end wall and penetrates the ceiling wall in the container, and is inserted into the first rotation drive shaft and is inserted into the first rotation drive shaft from the lower end. A second rotational drive shaft projecting downward from the rotational drive shaft;
In the granular material supply apparatus comprising a pair of drive sources capable of separately driving the first rotation drive shaft and the second rotation drive shaft,
The bottom surface turning member is disposed below the first bottom surface turning member and fixed to the lower end portion of the first rotation driving shaft, and is disposed below the first bottom turning member. A second bottom turning member fixed to the lower end so as to be integrally rotatable,
Formed in the first bottom turning member and extending into the powder discharge cylinder, swiveling above the blocking wall of the powder discharge pipe to apply an external force to the powder arch, and A first granule arch crushing arm for forcibly dropping a body from the granule passage hole below the closed wall;
It is formed on the second bottom turning member and extends into the powder discharge cylinder, and turns above the blocking wall of the powder discharge cylinder inside the turning area of the first powder arch crushing arm. And applying an external force to the granule arch, and comprising a second granule arch crushing arm for forcibly dropping the granule from the granule passage hole below the blocking wall,
The second bottom surface turning member is made thinner than the first bottom surface turning member, and the area of the turning region at the lower end of the second powder arch crushing arm is set to the lower end of the first powder arch crushing arm. The granular material supply apparatus characterized by being comprised so that it might become smaller than the area of the turning area | region of a part . The granular material supply apparatus according to claim 1, wherein the ceiling wall in the container is fixed to the first rotation drive shaft so as to be integrally rotatable . The container ceiling wall is a disk,
It is fixed to the powder or granular material supply container, according to the deposited granular material on the top surface of the container top wall to claim 1 or 2, characterized in that it comprises an upper standby guide for guiding the annular space Powder body supply device. The granular material supply apparatus according to claim 2, wherein the ceiling wall in the container has a conical shape whose diameter is increased downward . Formed in a state of projecting or sinking on the granular material deposition surface, curved in a spiral shape around the granular material discharge hole, and pushed on the bottom surface turning member to move on the granular material deposition surface The powder body supply apparatus according to any one of claims 1 to 4 , further comprising a bottom spiral guide that guides the powder body to be moved to the powder body discharge hole . 6. The granular material supply apparatus according to claim 5 , wherein the bottom spiral guide is one of an involute curve, a logarithmic spiral curve, and an Archimedes spiral curve .