JPS6356137B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a powder feeder applicable to, for example, a powder packaging machine.

[Prior Art] Generally, in order to package powders, it is necessary to divide the prepared powder for one prescription (multiple packages) equally into a predetermined number of packages. A powder feeder is required that divides and feeds the powder in predetermined amounts.

In conventional devices of this type, when distributing (spreading) the powder or granular material before dividing it, the powder or granular material is dropped into one of the grooves formed along the circumferential direction on the turntable, and then the granular material is distributed. By rotating the turntable, the powder was distributed over the entire groove.

[Problems to be Solved by the Invention] However, in the above-mentioned device, if the amount of rotation of the turntable is not properly controlled according to the falling state of the powder or granules being dropped, the powder or granules may be deposited in the groove. Some parts may remain where no powder has been dropped, or some parts may have a larger amount of powder than other parts. However, since the falling state of powder and granular materials varies depending on the amount, size, and humidity of the particles, it is not possible to appropriately control the amount of rotation of the turntable depending on the falling state of the powder and granular material. ,
Therefore, it is practically impossible to evenly distribute the powder throughout the groove, and as a result, it is extremely difficult to divide and feed the powder evenly.

This invention eliminates the drawbacks of the above-mentioned conventional methods, and provides a powder and granule material that can be evenly distributed and thereby evenly divided and supplied regardless of various conditions such as its amount and particle size. The purpose is to provide a feeder.

[Means for Solving the Problems] In order to achieve the above object, the present invention is configured as follows. That is, the powder feeder of the present invention includes a hopper having a circular hole at the lower end, an upper part protruding from the circular hole into the hopper to form an annular opening in the circular hole, and a lower part having a hopper having a circular opening. a rotatable distributor having an annular groove for accommodating the powder and granules; The scraping member includes a scraping plate having an annular groove, and a circular scraping member fixed to one side of the scraping plate and having a lower half fitted in the groove. It is characterized by being composed of a plate and a fan-shaped plate fixed to the other side of the scraping plate.

Furthermore, a second aspect of the present invention is that in the powder feeder, the scraping member rotates within the annular groove around an axis extending tangentially to a circular locus of rotation near the center of the groove. a first fan-shaped plate fixed to one side of the scraping plate and large enough to fit into the groove; and a first fan-shaped plate fixed to the other side of the scraping plate and centered more than the first sector-shaped plate. It is characterized by being comprised of a second fan-shaped plate with small corners.

[Operation] When powder and granules are introduced into the hopper while rotating the distributor, they are evenly accommodated in the annular groove. After being distributed, the distributor is switched to scraping rotation and the scraping member is rotated once to scrape out the divided powder and granules, which are then fed to the packaging machine through a shooter. By sequentially rotating the scraping member, the amount of scraping necessary for dividing the package can be obtained with each rotation. The scraping amount is adjusted by relatively changing the rotational speeds of the distributor and the scraping member. When the scraping rotational speed of the distributor is increased, the amount of powder and granules held back by the disk or fan-shaped plate increases, so the amount scraped per one time increases, but the number of divisions decreases. In the opposite case, the amount of scraping per time decreases, but the number of divisions increases. In either case, the amount is equally divided into a predetermined number of predetermined amounts depending on the prescription and the like.

[Example] Next, the present invention will be specifically explained with reference to the drawings.

FIG. 1 shows a first embodiment of the first invention,
1 is a case, 2 is a hopper that is integrally formed on the upper part of case 1 and has a circular hole at the lower end, and 3 is a case 1.
It is a substantially conical distributor whose upper part projects into the hopper 2 from the circular hole to form an annular opening 4 in the circular hole, and the distributor 3 has an annular groove 5 having an arcuate cross section at its lower periphery. When the granular material is introduced into the hopper 2, it is rotated (distributing rotation) by the drive of the motor 6 to substantially evenly distribute the granular material falling through the annular opening 4 in the circumferential direction. and is accommodated in the annular groove 5. The size of the gap in the annular opening 4 is set to a size that is compatible with the various conditions of the powder and granular material to be handled so that the powder and granular material can fall stably. The rotational speed and amount of rotation are such that the rotational speed and amount of rotation are set to suit the conditions of the powder and granular material to be handled so that the powder and granular material falling through the annular opening 4 will not be scattered or not distributed in the circumferential direction. and the amount of rotation. 7 is rotatably provided at the tip of the swing lever 8 in the case 1, and includes a disk 9 having a size to fit into the annular groove 5 and a semicircular plate 10 parallel to the disk 9.
The scraping member 7 is a scraping member formed by combining a scraping plate 11 with a scraping plate 11, and the scraping member 7 has a circumferential edge of the disk 9 and a semicircular plate 10 and a tip edge of the scraping plate 11 inscribed in the annular groove 5. At the possible scraping position shown in the figure, each time the distributor 3 is rotated by a predetermined angle (raking rotation) by the drive of the motor 6, it is rotated by one rotation by the drive of the motor 12, and the powder in the annular groove 5 is removed. The granules are scraped outward in the radial direction by a predetermined angle.
Further, the scraping member 7 can be displaced between the illustrated scraping position and a position retracted upwards by swinging a swinging lever 8 by appropriate means, so that the powder and granules are fed into the hopper 2. When the distributing body 3 is rotated, the distributing body 3 is placed in a retracted position so as not to interfere with the distribution of the powder or granular material by the rotation of the distributing body 3. Reference numeral 13 denotes a shooter that guides the powder scraped out of the annular groove 5 by the scraping member 7 to, for example, a packaging machine.

The powder feeder described above leaves the scraping member 7 in the retracted position and rotates the distributor 3 for distribution.
For example, when a powder or granular material such as a powder prepared for one prescription is fed into the hopper 2 preferably in a circular motion, the powder or granular material passes through the annular opening 4 and falls into the annular groove 5 along the circumferential direction. It will be substantially evenly distributed and accommodated. When all the powder and granules have fallen, the distributor 3 is switched to scraping rotation, and the scraping member 7 is set to the scraping position and rotated one rotation at a time, so that the powder and granules in the annular groove 5 are removed by a predetermined angle. It is divided into parts and scraped out, and then supplied to, for example, a packaging machine or the like through the shooter 13. The scraping amount is determined by relatively changing the scraping rotational speed of the distributor 3 and the rotational speed of the scraping member 7 (generally, the rotational speed of the scraping member 7 is kept constant, and (by changing the scraping rotational speed) as desired. That is, for example, when the scraping rotation speed of the distributor 3 is increased, the amount of powder dammed up by the disk 9 increases, so the amount scraped per one time increases, but on the other hand, the number of divisions decreases, and conversely, the number of divided parts decreases. When the scraping rotation speed in step 3 is lowered, the amount of powder and granular material held up by the disk 9 decreases, so the amount of scraping per time decreases, but the number of divisions increases, and in any case, the powder and granular material
It will be equally divided into a predetermined number of predetermined amounts.

2 to 4 show a second embodiment of the invention,
21 is a case, 22 is a hopper with a circular hole at its lower end, and 23 is a substantially conical center guide that projects from the circular hole into the hopper 22 to form an annular opening 24 in the circular hole. The fixed column 25 can be rotated by driving a motor 26 provided at the upper end thereof. The hopper 22 has a guide plate 28 provided on the upper surface of the case 21 on its outer peripheral frame 27,
The actuating plate 31 is fitted loosely into vertical grooves 29, 29, 29 formed in 28, 28 so as to be movable up and down, respectively, and is provided on the upper surface of the case 21 so as to be rotatable along elongated holes 30, 30, 30. sloped surfaces 32, 32,
Guide pins 33, 33, which engage with 32, respectively.
33, and when the knob 34 is operated to rotate the operating plate 31 in one direction, the inclined surfaces 32, 3
2 and 32 push up the guide pins 33, 33, and 33, which causes the hopper 22 to rise and open the annular opening 24.
When the actuating plate 31 is rotated in the opposite direction, the guide pins 33, 33, 33 are moved to the inclined surface 3.
2, 32, and 32, the hopper 22 descends under its own weight to close the annular opening 24. Reference numeral 35 denotes a distributor disposed coaxially below the center guide 23 and provided with an annular groove 36 having an arcuate cross section on the lower periphery. 24 is opened, it rotates together with the center guide 23 via a cylindrical shaft 38 that is rotatably inserted into the outer periphery of the fixed column 25 by the drive of the motor 37 (distributed rotation).
As a result, the powder particles falling through the annular opening 24 are substantially evenly distributed in the circumferential direction and accommodated in the annular groove 36. The center guide 23 rotates while the annular opening 24 is open, that is, during the dispensing operation, and the rotational speed and amount of rotation of the center guide 23 and the distributor 35 during dispensing are determined by the amount of rotation that occurs through the annular opening 24. In order to prevent the powder from scattering or not being distributed in the circumferential direction, the rotation speed and amount of rotation are set to suit the conditions of the powder to be handled. Reference numeral 39 is rotatably provided at the tip of the swinging lever 40, and a disc 41 having a size to fit into the annular groove 36 and a fan-shaped plate 42 parallel to the disc 41 are removed from the scraping plate 43.
The scraping member 39 is a scraping member that is combined with the scraping member 39.
In the scraping position shown in FIG. 2 where the peripheral edges of the disc 41 and the fan-shaped plate 42 and the tip edge of the scraping plate 43 are inscribed in the annular groove 36, the distributor 35 is moved at a predetermined angle by the drive of the motor 37. Each rotation (raking rotation), the motor 44 drives the powder and granules in the annular groove 36 by a predetermined angle in the radial direction. It is designed to be scraped outward. The scraping member 39 receives the urging force of a compression spring 48 that acts on the rear end of the swing lever 40 and urges the swing lever 40 clockwise in FIG. Stopper 5 equipped with a limiting elastic body 49
Due to the elastic force of 0, it is stably located at the scraping position, and when distributing powder and granules,
The swing lever 40 acts on the rear end of the swing lever 40.
is displaced upward from the annular groove 36 by the operation of the solenoid 51 that swings it counterclockwise in FIG. It is designed so that it does not interfere with Reference numeral 52 denotes a suitable vibrating feeder for guiding the powder material scraped out from the annular groove 36 by the scraping member 39 to, for example, a packaging machine or the like.

In this powder feeder, powder such as a powder prepared for one prescription is fed into a hopper 22 that closes an annular opening 24, preferably in a circular motion, and the scraping member 39 is moved to a retracted position. Then, when the knob 34 is operated to rotate the actuating plate 31 in one direction, the hopper 22 rises and opens the annular opening 24, and the center guide 23 and the distributor 3
5 rotates, whereby the powder particles fall through the annular opening 24 and are substantially evenly distributed and accommodated in the annular groove 36 along the circumferential direction. At this time, the opening amount of the annular opening 24 (i.e., the opening amount of the actuating plate 3
It is preferable to adjust the amount of rotation (1) as appropriate with the knob 34 while observing the falling tendency of the powder or granular material so that it falls stably. When all the powder and granules have fallen, operate the knob 34 to rotate the operating plate 31 to the initial position, the hopper 22 will descend and close the annular opening 24, the center guide 23 will stop rotating, and The distributor 35 completes its distribution rotation. Subsequently, when the distributor 35 is switched to the scraping rotation and the scraping member 39 is set to the scraping position and rotated one rotation at a time, the powder and granules in the annular groove 36 are divided and scraped out by a predetermined angle. , vibration feeder 52
It is then supplied to, for example, a packaging machine. The scraping amount is determined by relatively changing the scraping rotational speed of the distributor 35 and the rotational speed of the scraping member 39 (generally, the rotational speed of the scraping member 39 is kept constant, and (by changing the scraping rotational speed) as desired. That is, for example, when the scraping rotational speed of the distributor 35 is increased, the amount of powder dammed up by the disk 41 increases, so the amount scraped per time increases, but on the other hand, the number of divisions decreases, and conversely, When the scraping rotation speed of the scraper 35 is lowered, the amount of powder and granular material held up by the disc 41 decreases, so the amount of scraping per time decreases, but the number of divisions increases, and in any case, the powder and granular material It will be equally divided into a predetermined number of predetermined amounts. Even if the actuating plate 31 is rotated to the initial position and the hopper 22 closes the annular opening 24, for example, if the packaging machine is not ready for packaging and the powder or granules must not be fed in parts, Distributor 35 and scraping member 3
9 has to wait without starting the scraping operation, and after the annular opening 24 is closed, even if the distributing body 35 and the scraping member 39 are in the process of scraping, the next powder or granular material cannot be transferred to the hopper 22. This means that it can be invested.

In the embodiment shown in FIG. 1, an appropriate vibration feeder may be used instead of the shooter 13. In addition, in the embodiment shown in FIGS. 2 to 4, the hopper 2
Although the hopper 22 is moved up and down to open and close the annular opening 24, the structure for moving the hopper 22 up and down is not limited to the one shown in the figure. Good too. Further, the center guide 23 may be configured so as not to rotate. Alternatively, the distribution body 35 may be rotatably supported outside the annular groove 36, and the powder in the annular groove 36 may be scraped radially inward by the operation of the scraping member 39. Furthermore, in each of the embodiments, when charging the powder or granules into the hoppers 2 and 22, it is preferable to do so in a circular manner for even distribution, but it is not necessarily necessary to do so in a circular manner. Due to the function of the portion of the distributor 3 that protrudes into the hopper 2 or the portion of the center guide 23 that protrudes into the hopper 22, the powder and granules charged into the hoppers 2, 22 are distributed around the protruding portion and are annularly shaped. Since the powder falls from almost the entire circumference of the openings 4 and 24, the required uniform distribution is automatically achieved, and the protruding portion is not limited to a conical shape but may have an appropriate shape suitable for distributing the powder or granules. It goes without saying that the present invention can be modified in various ways to the above-mentioned embodiments.

FIG. 5 shows a scraping member 64 implementing the second aspect of the present invention. This scraping member 64 consists of a first fan-shaped plate 61 that does not disturb the distribution of powder in the stopped state as shown in FIG. It is composed of a fan-shaped plate or an end plate 63. In the embodiment shown in FIG.
The scraping member 7, which is connected to the 64, it does not interfere with the distribution of the powder during rotation of the distributor (rotation for scraping), so there is no need to retreat from the scraping position. As in the case of FIG. 1, a predetermined scraping amount can be obtained by making one rotation in the direction of the arrow from the state of FIG. 5.

[Effects of the Invention] As described above, the present invention includes a hopper having a circular hole at the lower end, an upper part protruding from the circular hole into the hopper to form an annular opening in the circular hole, and a lower part having the annular opening. A rotatable distributor is provided with an annular groove for storing the powder and granules that have fallen from the groove; Since it is equipped with a scraping member for scraping out, it is possible to evenly distribute powder and granular materials such as powder regardless of various conditions such as the amount thereof and the size of the particles.

The scraping member is fixed to one side of a scraping plate that rotates about an axis extending tangentially to a circular locus of rotation near the center of the groove in the annular groove, and extends downward into the groove. Consists of a disk with two halves fitted together and a fan-shaped plate fixed to the other side of the scraping plate, so the distributed powder is divided into a predetermined number of equal parts and supplied. can do. Further, as in the second invention, there is provided a scraping plate that rotates around an axis extending tangentially to the circular locus of rotation near the center of the groove in the annular groove, and a scraping plate that is fixed to one side of the scraping plate. a first portion of a size that can fit into the groove;
When using a scraping member consisting of a fan-shaped plate and a second sector-shaped plate fixed to the other side of the scraping plate and having a smaller central angle than the first sector-shaped plate, even distribution is even better; It is not necessary to retreat the scraping member from the scraping position in the annular groove during rotation of the distributor, and it is possible to supply powder and granules with high efficiency. In addition, the present invention has excellent effects such as being widely applicable to powders other than powders.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing a first embodiment of the first invention, Fig. 2 is a longitudinal sectional front view showing the second embodiment, and Fig. 3 is a plan view of Fig. 2; 4
The figure is a side view of the main part of FIG. 3, and FIG. 5 is a longitudinal sectional view showing the second embodiment of the invention. 1, 21: Case, 2, 22: Hoppa, 3, 3
5: Distributor, 4, 24: Annular opening, 5, 36, 6
5: Annular groove, 6, 12, 26, 37, 44: Motor, 7, 39, 64: Scraping member, 8, 40: Swing lever, 9, 41: Disc, 10: Semi-disc, 1
1, 43, 63: scraping board, 13: shooter, 2
3: Center guide, 25: Fixed support, 27: Peripheral frame, 28: Guide plate, 29: Vertical groove, 30: Long hole,
31: Actuation plate, 32: Inclined surface, 33: Guide pin, 34: Knob, 38: Cylindrical shaft, 42, 61: Sector plate, 45, 46, 47: Gear, 48: Compression spring, 49: Elastic body, 50 : Stopper, 51: Solenoid, 52: Vibration feeder, 62: End plate.

Claims (1)

[Scope of Claims] 1. A hopper with a circular hole at the lower end, an upper part protruding from the circular hole into the hopper to form an annular opening in the circular hole, and a lower part of the powder and granular material that has fallen from the annular opening. a rotatable distribution body having an annular groove for accommodating the distribution body, and a scraping member that scrapes the powder and granular material in the groove by a predetermined angle to the outside of the groove as the distribution body rotates. The scraping member comprises:
A scraping plate that rotates around an axis extending tangentially to the circular locus of rotation near the center of the groove in the annular groove, and a lower half fixed to one side of the scraping plate and placed inside the groove. What is claimed is: 1. A powder feeder comprising a disc having two parts fitted together, and a fan-shaped plate fixed to the other side of a scraping plate. 2. The scraping member according to claim 1, wherein the scraping member is supported by a swinging member that is movable between a scraping position adapted to the annular groove and a position retracted outward from the scraping position. Powder feeder. 3. A hopper with a circular hole at the lower end, an annular groove whose upper part projects into the hopper from the circular hole to form an annular opening in the circular hole, and accommodates powder and granular material falling from the annular opening. and a scraping member that scrapes the powder and granular material in the annular groove outward by a predetermined angle at a time as the distributor rotates; The plate includes a scraping plate that rotates around an axis extending tangentially to a circular locus of rotation near the center of the groove within the annular groove, and a scraping plate that is fixed to one side of the scraping plate and rotates within the groove. It is characterized by being composed of a first sector-shaped plate having a size that can fit into the scraping plate, and a second sector-shaped plate fixed to the other side of the scraping plate and having a center angle smaller than that of the first sector-shaped plate. Powder and granule feeder.