JPH0536555Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a sorting device that is applied to sort out defective products in powdered materials such as pharmaceuticals (granules, granular powder), foods, chips, flakes, etc. It is something.

[Conventional technology]

Conventional examples are shown in FIGS. 5 to 10. That is,
In the first conventional example shown in FIG. 5, a powder or granule 51 is dropped along a passage 50, and when the defective powder or granule 51 reaches the separator 52, the separator 52 changes from the solid line state to the imaginary line state. By switching, the defective powder or granular material 51 is dropped into the defective product container 54 without falling into the non-defective product container 53.

In the second conventional example shown in FIG. 6, a powder or granular material 51 is dropped along a passage 50, and when a defective powder or granular material 51 reaches the front of an air gun 55, a jet of air is momentarily blown out from the air gun 55. The defective powder or granular material 51 is dropped into a defective product container 54.

In the third conventional example shown in FIGS. 7 and 8, a suction passage 56 is formed so as to cross the passage 50 in a T-shape, and a rotary valve 57 is provided in this suction passage 56. As shown in FIG. 8, the rotary valve 57 is closed and no suction operation is performed, but when the defective powder 51 reaches the front of the suction passage 56, the rotary valve 57 is rotated as shown in FIG. 8 to open the suction passage 56. ,
The defective powder or granule material 51 is removed from the passage 50 by suctioning the defective powder or granule material 51 with air.

The fourth conventional example shown in FIGS. 9 and 10 is
A suction passage 56 intersects with the passage 50 in a T-shape.
, and is provided with a shutter 58 that opens and closes the suction passage 56 by sliding. Normally, as shown in FIG. 9, the shutter 58 is closed and no suction operation is performed. When the shutter 58 reaches this point, the suction passage 56 is opened by sliding the shutter 58 as shown in FIG.
It is intended to remove.

[The problem that the idea attempts to solve]

In the first conventional example, the surface of the separator 52 serves as a path for dropping the non-defective powder and granular material 51 into the good product container 53, and because it is always in contact with the powder and granular material 51, fine powder is deposited on the surface of the separator 52. The particles tend to adhere to the surface of the particles, and the conveyance of the powder or granular material 51 may be stagnated. Further, the powder and granular material 5 is attached to the shaft portion 52a of the separator 52.
1 becomes clogged, the separator 52 may malfunction. Furthermore, since all of the granular material 51 on the separator 52 is removed when the separator 52 is operated, there is a drawback that only a small amount of defective granular material 51 cannot be removed.

Although the second conventional example does not have the disadvantages of the first conventional example, it has the disadvantage that the layered conveyance of the powder 51 is disturbed when the air is blown, and powder smoke is generated. Also, powder 5
1 has a drawback that when the particle size is small, it is difficult to reliably collect the powder or granule 51 into the defective product container 54 because the direction in which the powder or granule 51 is blown away is uncertain.

The third conventional example does not have the drawbacks of the second conventional example, but when the rotary valve 57 is opened, the fine powder of the granular material 51 enters the gap 57a where the rotary valve 57 rotates, and it sticks. There is a risk that the rotary valve 57 may become inoperable. Further, if the suction passage 56 is large, it is impossible to remove a small amount, and conversely, if the cross section of the suction passage 56 is made small, the powder 51 causes so-called bridging and blocks the suction passage 56.These disadvantages are the first. It has some similarities with the conventional example. Furthermore, when the foreign matter 51a having a higher specific gravity than the powder 51 flows down, the gravity when it flows down is greater than that of the powder 51 even if the falling speed is the same, so when the normal defective powder is sucked. It was not possible to suction with the same level of air suction.

In the fourth conventional example, when the shutter 58 is opened, fine powder of the powder 51 enters the gap 58a in which the shutter 58 slides, and the fine powder of the granular material 51 sticks to the shutter 58.
make the operation impossible. Further, if the suction passage 56 is large, it is impossible to remove a small amount, and conversely, if the cross section of the suction passage 56 is made small, the powder 51 causes bridging and blocks the suction passage 56, which is the same drawback as in the third conventional example. Furthermore, when a foreign object 51a having a higher specific gravity than the granular material 51 flows down, it has the same drawback as the third conventional example in that it cannot be suctioned with air suction to the same degree as when suctioning a normal defective granular material.

Therefore, the purpose of this invention is to ensure that the shutter operates reliably and to eliminate a small amount of defective powder and granules, and to ensure the collection of defective powder and granules, while also eliminating defective powder and granules. To provide a sorting device that can reliably exclude even foreign matter having a higher specific gravity than powder or granules without blocking a passage.

[Means to solve the problem]

The sorting device of this invention consists of a passageway in which a suction slit is formed on the wall surface of the passage to allow powder and granular material to flow down, and a passageway formed on the outside of this passage and communicating with the suction slit, and a suction slit for the powder and granular material flowing down the passage. a suction chamber that suctions air from the air, a suction shutter whose proximal end is supported by a shaft support in the suction chamber and has an opening/closing part at its tip that opens and closes the suction slit by a swinging motion; The base end is pivotally supported by a shaft support, and when the suction shutter is open, the passage is blocked below the suction slit by a rocking motion linked to the rocking motion of the suction shutter, and the powder particles flowing down are sucked. It is equipped with a guide shutter that guides the guide to the slit.

[Effect]

In a normal state in which powder and granules pass through, the suction shutter is in a closed state that closes the suction slit provided in the passage, and the induction shutter is in an open state that allows passage of powder and granules. Therefore, the conveyance of the powder or granular material within the passage is not stagnated or disturbed.

On the other hand, if defective powder or granules are mixed in the powder or granules, the suction shutter opens the suction slit by the swinging action, and in conjunction with this suction shutter, the induction shutter closes the passage to the suction slit. It becomes a closed state where it is shut off at the lower part. Therefore, when removing foreign matter that has a higher specific gravity than good powder or granules, the induction shutter prevents the foreign matter from falling downward and guides it to the suction slit, so it is necessary to reliably draw the foreign matter into the suction slit. I can do it.

In this case, as a preferred embodiment of this invention, the foreign matter can be more reliably removed by suction if the guide shutter is closed and tilted downward toward the suction slit so that its tip touches the lower edge of the suction slit. I can do it.

In addition, since the opening of the suction slit is relatively narrow,
It is possible to remove a small amount of powder and granules, and since the air passing through the suction slit is at high speed, the suction slit is not blocked by bridges of powder or granules. Furthermore, since the suction slit is opened and closed by the suction shutter in the suction chamber by a swinging motion, powder particles do not adhere to the shaft support of the suction shutter, and therefore malfunction of the suction shutter does not occur.

〔Example〕

An embodiment of this invention will be described based on FIGS. 1 to 3. As shown in Figures 1 and 2,
An input port 11 is provided at the upper end of the passage 1 arranged in the vertical direction, and the powder and granular material 2 introduced through the input port 11 flows downward. A suction slit 3 is formed in the wall of the passage 1, and a suction chamber 4 containing the suction slit 3 inside is provided outside the suction slit 3.

The suction chamber 4 and the passage 1 are provided with a suction shutter 5 and an induction shutter 6, respectively, which swing in conjunction with each other. Both of these shutters 5 and 6 have their proximal ends supported by shaft supports 7 and 8 so as to be swingable.

The passage 1 is formed by combining two falling guide plates 12 and 13, so that the granular material 2 flows down the passage 1 in a layered manner.

The suction slit 3, as shown in FIG.
It has a length and a predetermined width corresponding to the falling width of the powder or granular material 2, and is formed so that the longitudinal direction is perpendicular to the falling direction of the powder or granular material 2 shown by arrow A. In this case, the width of the suction slit 3 is preferably the minimum width that allows the powder and granular material 2 to be sucked in order to remove a small amount of defective powder and granular material 2.

The suction chamber 4 has an opening 10.
By suctioning air with a pump (not shown), the inside of the suction chamber 4 is kept at a low pressure with the suction shutter 5 closed, and the defective granular material 2 is discharged from the opening 10 with the shutter 5 open. .

The suction shutter 5 has a suction slit 3 at its tip.
An opening/closing part 9 is provided for opening and closing. Further, the guide shutter 6 has an inclined wall surface abutting portion 14 formed at its tip. This induction shutter 6 is supported by a shaft support 8 on the side of the fall guidance guide plate 13, and in the open state hangs down from the shaft support 8 to allow the powder and granular material 2 to fall into the passage 1, but in the closed state, As shown in FIG. 2, the wall contact portion 14 swings toward the suction slit 3 and comes into contact with the lower edge of the suction slit 3 to block the powder 2 from falling, and one side faces toward the suction slit 3. This becomes the guiding portion 16 that was previously inclined downward. The suction shutter 5 and the induction shutter 6 are each driven to operate at high speed in response to a detection signal of the defective powder or granular material 2.

According to this embodiment, normally the suction shutter 5 closes the suction slit 3, the induction shutter 6 is in an open state, and the good powder granules 2 are collected through the passage 1 into a good product container (not shown). Ru. Powder 2
When a defective powder or granular material, such as a foreign object 15, is mixed in, the shutters 5 and 6 that receive a detection signal of this object swing when the foreign object 15 reaches the front surface of the suction slit 3, and close the suction slit. 3 is opened and the passage 1 is blocked to guide the defective powder or granules 15 along the guide portion 16 of the guide shutter 3 to the suction slit 3. At this time, since the pressure inside the suction chamber 4 is low, the foreign matter 15 is quickly suctioned, and the passage 1
removed from

In this way, the guide shutter 6 closes the passage 1 when suctioning the foreign object 15 and prevents the guide portion 1 from reaching the suction slit 3.
6, even foreign matter with a large specific gravity that cannot be suctioned with normal suction force can be easily drawn into the suction chamber 4. Therefore, it is possible to reliably sort out defective products such as foreign objects from the powder or granular material 2.

FIG. 4 shows a powder inspection device to which this sorting device is applied. That is, while the granular material 2 is being supplied in a fixed amount by the swinging trough 30, the granular material 2 is dropped into the gap between the pair of transparent rotating drums 17 and 18. At this time, the falling powder 2 is illuminated by the reflective illumination device 19 and the transmitted illumination device 20 installed in the rotating drums 17 and 18, and the reflective illumination device 19
An image sensor 21 provided on the side takes an image and optically inspects it.

When a defective powder or granule is detected in the powder or granule 2, a detection signal is sent from the signal processing circuit 22 to the sorting device drive circuit 23. The detected defective powder is in the passage 1.
When the shutter falls in front of the suction slit 3 in the
A drive signal is sent to the suction shutter 5 and the induction shutter 6 to drive the defective powder and granules from the passage 1 by suction. In addition, 25 is a good product collection container, 26
27 is a pipe for sucking defective powder from inside the suction chamber 4, and 28 and 29 are cleaners for the transparent rotating drums 17 and 18.

In this embodiment, in the closed state, the wall surface contacting part 14 of the guiding shutter 6 contacts the lower edge of the suction slit 3, and the guiding part 16 has one side tilted downward.
Although the present invention is not limited to this embodiment, various modifications are possible.

[Effect of idea]

According to this invention, in addition to suctioning out defective powder or granules, the passage is closed by the induction shutter during air suction, not only when removing foreign objects with a higher specific gravity than good powder or granules. Since it is possible to prevent blocked and defective foreign objects from falling and guide them to the suction slit, foreign objects with high specific gravity can be reliably drawn into the suction slit and removed from the suction passage.

In addition, since the opening of the suction slit is relatively narrow,
Since it is possible to remove a small amount of powder and granular material, and the air passing through the suction slit becomes high-speed, the suction slit will not be blocked by bridges of defective powder or granular material. Furthermore, since the suction slit is opened and closed by the suction shutter in the suction chamber by a swinging motion, powder particles do not adhere to the shaft support of the suction shutter, and therefore malfunction of the suction shutter does not occur.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the flowing state of powder and granular material in an embodiment of this invention, Fig. 2 is a cross-sectional view showing the suction operation of defective powder and granular material, and Fig. 3 is a partial cross-section of the suction seen from the passage side. 4 is an explanatory diagram of a powder inspection device to which this embodiment is applied, FIG. 5 is an explanatory diagram of the first conventional example, FIG. 6 is an explanatory diagram of the second conventional example, and FIG.
8 and 8 are explanatory diagrams of the third conventional example, and FIGS. 9 and 10 are explanatory diagrams of the fourth conventional example. 1... Passageway, 2... Powder, 3... Suction slit, 4... Suction chamber, 5... Suction shutter, 6...
Induction shutter, 9...Opening/closing part.

Claims (1)

[Scope of utility model registration request] A passage through which the powder and granules flow down and a suction slit is formed in the wall surface, and a suction chamber formed outside this passage and communicating with the suction slit and which sucks the powder and granules flowing down the passage with air from the suction slit. and a suction shutter whose distal end is provided with an opening/closing part whose base end is supported by a shaft support in the suction chamber and which opens and closes the suction slit by a swinging action; an induction shutter that is pivotally supported and that, by a swinging motion linked to the swinging motion of the suction shutter, blocks the passage below the suction slit and guides the flowing powder to the suction slit when the suction shutter is in an open state; A sorting device equipped with