JPH06114338A - Grain selecting device - Google Patents

Abstract

PURPOSE:To prevent the clogging of grains (beads) by simplifying the structure of a device and making a setting space small. CONSTITUTION:A grain selecting device comprises a belt conveyor 13 inclined in the width direction of the belt by holding the given angle, a section channel formed on the surface of the belt conveyor 13 in the traveling direction of the belt conveyor while holding the given interval, a drum hopper 12 mounted above the belt conveyor 13 and feeding grains on the belt, a connecting chute 29 connected with the side edge of the belt positioned below the belt conveyor 13 in its inclined direction and a couple of selector rollers 32 disposed below the connecting chute 29 and inclined in its rotating shaft direction. Further, a selector clearance 34 getting wider downwardly in the inclined direction and a recovery chute disposed below a central section in the longitudinal direction of the selector clearance 34 and the recovery chute for recovering the beads B dropped from the selector clearance 34 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material selecting device for selecting a modified product of particles (beads).

[0002]

2. Description of the Related Art Beads containing fragrances, medicines and pesticides,
The encapsulated beads obtained by encapsulating these in layers are
Not only is it necessary for the product to be uniform in appearance, but it is also necessary to make the sizes uniform to some extent depending on the intended use. Therefore, in the production of beads of this type, it is necessary to select deformed ones or those having different outer diameters, that is, defective products and non-defective products. Therefore, in order to select these defective products and non-defective products, for example, when the beads have a spherical shape, conventionally, a mechanical sieving and sorting device has been used.

This type of sieving device is constructed by stacking sieving plates having different hole diameters in several stages, and the hole diameter of each sieving plate becomes smaller toward the lower side. Then, when the beads are supplied onto the uppermost sieve plate while vibrating the respective sieve plates in the surface direction, these beads drop downward through the sieve holes in the respective sieve plates. It is sorted into those that are not. Therefore, if the beads remaining on a specific sieve plate are collected,
Beads having a constant diameter, that is, non-defective beads can be selected and obtained.

Recently, there is also a particle sorting apparatus for identifying defective beads by using image processing technology. In this type of particle sorting apparatus, beads are arranged in one row (or several rows) and moved, and these are photographed by a plurality of cameras to acquire their image data, and the image data is supplied to a computer. Then, the computer compares the input image data with preset standard image data, judges the shape and size of the beads, and sorts the beads into non-defective products and defective products. The method using such an image processing apparatus can cope with various shapes by simply storing data in advance, and the sorting accuracy is extremely high.

[0005]

However, in the mechanical sieving sorter shown in the conventional example, if the diameter of one cross section of the beads is smaller than the diameter of the sieving hole, all of these beads pass through the sieving plate. Therefore, it is not possible to select beads that are deformed into teardrop shapes or beads that are partially lacking, and beads with a diameter slightly larger than the sieve holes are likely to be clogged in the sieve holes. This is not very desirable because it requires regular work to remove the beads that have clogged up.

Further, the sorting apparatus using image processing has a much higher sorting accuracy than the mechanical sieving sorting apparatus, but the beads are transported in a line or in several rows so as to be easily photographed by a camera. Therefore, the bead transfer device becomes complicated and large, while multiple cameras are installed to eliminate the blind spots, and the image processing device costs such as analyzing image data with a computer. Is quite expensive. Further, when the two beads are adhered, it is very difficult for the image processing apparatus to find and judge the defect, which is not preferable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a particle sorting apparatus which has a simple structure, a small installation space, and can prevent bead clogging.

[0008]

According to the present invention, in order to achieve the above object, a granular material sorting apparatus includes a belt conveyor inclined at a predetermined angle in the width direction, and a belt surface of the belt conveyor. In the traveling direction, a sorting groove provided at a predetermined interval, a granular material supply means provided above the belt conveyor and supplying granular material onto the belt, and a downward direction when viewed in the inclination direction of the belt conveyor. And a recovery dish connected to the side edge of the belt located at.

[0009] Preferably, the recovery tray is configured as a shooter for connecting the belt conveyor and a second sorting means provided later, and the second sorting means is arranged below the shooter and has its rotation shaft. A pair of rollers inclined in a direction, a sorting gap formed between the rollers, the spacing becoming wider as it goes downward in the tilt direction, and a sorting gap provided in the lower part of the central portion as viewed in the longitudinal direction. And a receiving tray for receiving the particles dropped from the sorting gap.

[0010]

According to the above-described particle sorting apparatus, the particles having a high sphericity of a predetermined value or more among the particles supplied onto the belt by the particle supply means while the belt conveyor is being driven. Is rolled down along the sorting groove of the belt conveyor and is collected in the collecting tray, while particles having a sphericity lower than a predetermined value are retained in the sorting groove and eliminated in the running direction of the belt. . Further, the granules received on the collecting tray are then used as shooters by the collecting tray, are supplied between the pair of rollers from the shooter, and are moved while rolling along the selecting gap to move to the selecting gap. It falls further downward, and only particles having a diameter within a predetermined range are collected in the receiving tray.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2, there is shown an overall particle sorting apparatus. This granular material sorting apparatus includes a main body frame 10, a bead hopper 11, a drum hopper 12, a first sorting unit 13 and a second sorting unit 14. These bead hopper 11, drum hopper 12, first sorting unit 1
3 and the 2nd selection part 14 are arranged in order in the longitudinal direction of the main body frame 10, and are installed.

The bead hopper 11 is in the form of a box having an open upper surface, and is located at the uppermost end on one end side of the main body frame 10. The bottom wall of the bead hopper 11 is inclined toward the other end side of the main body frame 10, and an opening 15 is provided in the lower portion of the front wall in the inclination direction. An electromagnetic vibration type feeder 16 is provided below the opening 15. In the bead hopper 11, for example, capsule-shaped (spherical) beads B containing a fragrance are stored.

The drum hopper 12 is located below the feeder 16 and includes a tray 17 for receiving the beads B from the bead hopper 11 via the feeder 16 and a rotary drum 18. The pan 17 has an upper opening and a bottom wall is inclined downward. A rotary drum 18 forming a front wall of the pan 17 is rotatably arranged in the inclined direction of the bottom wall. Although not shown, a photoelectric detector (level detector) is provided on the side wall of the tray 17. This photoelectric detector detects the amount of beads in the tray 17, and the operation of the feeder 16 is controlled by this sensor signal. Therefore, a fixed amount of beads B are always stored in the tray 17.

As shown in FIG. 3, take-out grooves 19 are formed on the peripheral surface of the rotary drum 18 in parallel with the rotation axis of the rotary drum 18 over both ends thereof, and these take-out grooves 19 have a width slightly larger than the bead diameter. However, there are predetermined intervals in the circumferential direction. Further, as shown in FIG. 2, the rotary drum 18 has a drive shaft connected to a drive motor 20 and can be gently rotated at a constant speed. Here, the rotating direction of the rotary drum 18 is the direction of the arrow shown in FIG.

On the other hand, as shown in FIG. 1, the first sorting unit 13 is located below the drum hopper 12, and the first sorting unit 13 is a belt composed of a pair of belt rollers 21 and a conveyor belt 22. It is the conveyor 13. The lower surface of the frame base 24 of the belt conveyor 13 is rotatably supported by the bracket 10a of the main body frame 10, and the conveyor belt 22 has a predetermined angle (for example, in the range of 0.5 to 6 degrees) in the width direction. ) Is inclined to. Further, this tilt angle can be adjusted by an operation handle H1 provided on the upper end side of the frame base 24. As shown in FIG. 2, the traveling direction of the conveyor belt 22 is transverse to the longitudinal direction of the main body frame 10,
That is, it is a direction (arrow direction in FIG. 2) transverse to the supply direction of the beads B from the bead hopper 11.

The conveyor belt 22 is made of synthetic resin such as polyurethane rubber, and a selection groove 25 is formed on the surface thereof in the width direction. These sorting grooves 25
Is a predetermined interval (pitch) in the traveling direction of the conveyor belt 22.
There are many provided. In addition, these selection grooves 25
Has an inverted trapezoidal cross section, and its maximum opening width is
The width of the beads B is slightly larger than the diameter of the beads B, and the beads B are in contact with both side surfaces and the bottom surface of the beads B. The thickness of the crests between the selection grooves 25 is such that the two adhered beads B do not roll. There is.

The drive shaft of the belt roller 21 is connected to a drive motor 26 via a drive belt (not shown) and can be gently rotated at a constant speed. The drive motor 26 is provided on the lower surface of the frame base 24. Further, the rotation speed of the drive motor 26, that is, the moving speed of the sorting groove 25 of the conveyor belt 22 is sufficiently faster than the moving speed of the take-out groove 19 of the rotary drum 18, and the conveyor belt 22 is Each group is rotated so as to match with one extraction groove 19.

Below the other end of the belt conveyor 13,
A defective product collection box 27 is installed. Conveyor belt 2
A delivery plate 28 is provided between the upper side edge of the inclined surface of the rotary drum 18 and the peripheral surface of the rotary drum 18 when viewed in the inclined direction. The delivery plate 28 reliably delivers the beads B from the respective take-out grooves 19 of the rotary drum 18 to the conveyor belt 22 and prevents the beads B from falling between the rotary drum 18 and the conveyor belt 22. There is. Further, a connection shooter 29 as a recovery dish is arranged in close proximity to the lower side edge of the conveyor belt 22 when viewed in the direction of inclination, and the receiving port of this connection shooter 29 is the length of the conveyor belt 22 in the longitudinal direction. It is widely used in response to this. A bottom wall of the connection shooter 29 is inclined, and a plurality of flow dividing guides 30 are provided on the bottom wall at predetermined intervals in the longitudinal direction.

Beads B stored in the bead hopper 11
Is intermittently discharged from the feeder 16 and supplied to the tray 17 of the drum hopper 12. The beads B supplied to the tray 17 are taken out from the take-out groove 1 as the rotary drum 18 rotates.
9, the beads B are spilled from the take-out groove 19 when the take-out groove 19 is tilted downward from the upper side, and the beads B are spilled from the take-out groove 19 onto the conveyor belt 22 via the delivery plate 28 from the upper side in the tilt direction. Supplied.
Each bead B supplied to the conveyor belt 22 enters a separate sorting groove 25, and the bead B having a higher sphericity than a predetermined value among these beads B rolls in the sorting groove 25 and is connected to the connection shooter 29 side. Then, it is supplied from the connection shooter 29 to the second selection section 14 in the subsequent stage. on the other hand,
Since defective beads such as beads B having a sphericity lower than a predetermined value, for example, teardrop-shaped beads, partially broken beads, or beads having two or more adhered to each other have large rolling resistance, On the conveyor belt 22 without rolling. Therefore, the defective product is moved in the traveling direction of the conveyor belt 22, drops below the other end side of the conveyor belt 22, and is rejected to the defective product collection box 27.

The rolling speed of the beads B in the sorting groove 25 varies depending on the type of beads, for example, the rolling resistance of the beads. In this case, the belt conveyor 1
By adjusting the inclination angle of 3, the sorting performance of the beads B can be stably maintained. Below the connection shooter 29, as shown in FIG. 1, a second selection unit 14 is provided. The second selection unit 14 includes a roller frame 31 and a large number of selector rollers 32, and the selector rollers 32 are paired one by one. As shown in FIG. 2, the longitudinal direction of the roller frame 31 is lateral to the longitudinal direction of the main body frame 10.
One side edge of the roller frame 31 on the belt conveyor 13 side is
The roller frame 31 is rotatably supported by the bracket 10b of the main body frame 10, and the roller frame 31 is inclined downward at a predetermined angle from one side edge to the other side edge. This inclination angle can be adjusted by a support bolt 33 provided between the other side edge of the roller frame 31 and the main body frame 10.

Further, between both sides of the roller frame 31,
A plurality of pairs of selector rollers 32 are passed one by one and are rotatably and pivotally supported. As is apparent from FIG. 4, the pair of selector rollers 32 extend so as to be spaced apart from each other with their rotation axes at a predetermined angle. That is, a selector gap 34 is formed between the pair of selector rollers 32, and the width of the selector gap 34 becomes wider as it goes downward when viewed in the roller inclination direction.

Further, the pair of selector rollers 32 is provided with a pulley 35 at either the upper end or the lower end. For example, in a pair of selector rollers 32, if one selector roller 32 has a pulley 35 at the upper end, the other selector roller 32 has a pulley 35 at the lower end. On the other hand, as shown in FIG.
Two drive motors 36, 3 are provided above and below the one end side.
7 are arranged. Pulleys 36a and 37a are provided at the tips of the drive shafts of the drive motors 36 and 37,
Among the pulleys 36a, 37a of the drive motors 36, 37, between one pulley 36a and each pulley (not shown) on the upper end side of the selector roller 32, and the other pulley 3
Driving belts 38 and 39 are respectively wound around 7a and the pulley 35 on the lower end side of the selector roller 32. With reference to FIG. 5, it is clarified how the drive belts 38 and 39 are wound around the pulleys of the rollers. For example, the broken line shows the drive belt 38 that cooperates with the upper pulley of the selector roller 32. The drive belt 39 that cooperates with the lower end pulley of the selector roller 32 is shown by the solid line. Also, the two drive motors 3
6 and 37 are designed to rotate in the same direction.
As shown in, the drive belts 38 and 39 run in the same direction. Therefore, the pair of selector rollers 32 rotate in opposite directions, respectively, and the rotation direction is the direction of the arrow shown in FIG.

On the upper end side of the selector roller 32, as shown in FIG. 1, a supply port 40 for the beads B is provided below the outlet of the connection shooter 29. As shown in FIG. 5, the supply port 40 for the beads B has a gap 4 in which the rotation direction of the adjacent selector roller 32 is downward.
2, that is, a pair of adjacent selector rollers 32
Triangular prism blocks 41 with their bottom sides facing downward are arranged at equal intervals so as to close the gaps 42 therebetween. Therefore, the beads B can be reliably supplied only to the selector gap 34 by the bead supply port 40.

On the other hand, when viewed in the longitudinal direction of the selector gap 34, a recovery shooter 43 as a receiving tray is provided below the central portion thereof, and the recovery shooter 43 is inclined in the longitudinal direction of the roller frame 31. Is extended. In this recovery shooter 43, a flexible resin belt 44 is curved in a U shape, and a pair of slide bars 45 are provided in parallel at the upper end edges thereof. These slide bars 45 extend from one end of the roller frame 31 to the other end while being inclined at a predetermined angle. Cylindrical sliders 46 are provided at both ends of these slide bars 45.
Pair of guide rods 4 provided between both side edges of the
7 is slidably attached. Therefore, the size of the interval between the slide bars 45 can be freely adjusted, and the position of the interval between the slide bars 45 can be changed in the direction of the guide rod 47. The movement of these slide bars 45 can be adjusted by an operation handle H2 provided on one end side of the roller frame 31.

According to FIG. 2, the other end of the recovery shooter 43 projects from the roller frame 31, and a non-defective box 50 for collecting beads B is provided below the projected recovery shooter 43. Also, the roller frame 3
Below 1 is provided a defective product collection case 51 for collecting the beads B dropped in addition to the collection shooter 43, that is, the defective beads B.

Therefore, the beads B, which are judged to be spherical in the first sorting section 13 at the preceding stage, are uniformly directed toward the respective supply ports 40 of the second sorting section 14 via the diversion guide 30 on the connection shooter 29. Supplied. The beads B supplied to the second sorting unit 14 first enter the supply port 40 and are supplied to the selector gap 34 from the upper ends of the pair of selector rollers 32. Then, the beads B move downward while rolling along the selector gap 34 and at a predetermined position.
To fall downwards. Among the beads B dropped from the selector gap 34, the beads B dropped from the intermediate region of the selector gap 34, that is, non-defective beads B whose diameter is within the allowable range, drop onto the recovery shooter 43 and are returned to the non-defective recovery box. Recovered to 50. Other small or large diameters are not received by the recovery shooter 43 but fall downward as they are and are rejected by the defective product recovery case 51.

Here, if the interval between the slide bars 45 of the recovery shooter 43 is wide, beads B having a wide range of diameter size are recovered, and conversely, if the interval is narrow, beads having a more uniform diameter size are collected. B will be recovered. Also,
If the pair of slide bars 45 are located at the upper edge of the roller frame 31, the beads B having a small diameter dimension are collected at the lower edge of the roller frame 31, and the beads B having a large diameter dimension are respectively collected as non-defective products. Will be done.

Therefore, according to the above-described embodiment, in the first sorting section 13, the beads B are rolled in the slanted sorting grooves 25, and the difference in rolling resistance of the beads B is used to make the beads B.
Since the modified product of No. 2 is excluded, it is possible to easily exclude the beads B which are adhered by two or more and which cannot be identified by the image processing technique. On the other hand, the beads B staying in the sorting groove 25 are moved as defective products as the conveyor belt 22 travels, and then dropped and removed from the conveyor belt 22, so that the beads B can be prevented from being clogged. Since the 1-sorting unit 13 has a simple structure in which the belt conveyor is tilted, it is possible to obtain the effect that the cost of the apparatus itself can be reduced. Further, the beads B having a spherical shape are delivered to the connection shooter 29 while spreading in the longitudinal direction of the belt conveyor 13 as the conveyor belt 22 travels, so that the connection shooter 29 is provided with the diversion guide 30. Only, each supply port 4 of the second sorting section 14 without providing a special bead developing device.
The beads B can be uniformly supplied to 0, and the layout of the second selection unit 14 can be freely set. Furthermore,
By providing the second sorting unit 14 so that even the diameter dimension of the beads B determined to be spherical by the first sorting unit 13 (belt conveyor 13) can be sorted, the sorting property of beads is further improved. The effect such as is also obtained.

In the second sorting section 14 of the above-described embodiment, the pair of selector rollers 32 are arranged with a predetermined angle between their rotation axes, whereby the rollers are inclined in the inclination direction. The selector gap 34 whose width becomes wider as it goes downward is obtained. However, as shown in FIG. 6, a taper roller whose diameter becomes smaller from the one end side to the other end side is formed by changing its rotation axis line. A pair of selector rollers 32 'may be arranged in parallel and the same effect can be obtained in this case.

[0030]

As described above, the granular material sorting apparatus of the present invention has a belt conveyor inclined at a predetermined angle in the width direction and a predetermined distance in the running direction on the belt surface of the belt conveyor. And the selection groove provided to
Then, with a simple structure of providing a granular material supply means for supplying the granular material on the belt and a recovery tray connected to the belt side edge located below in the inclination direction of the belt conveyor, the granular material supply means is provided. Among the granules supplied to the belt conveyor, granules having a high sphericity of a predetermined value or higher are collected in the recovery tray by rolling downward along the sorting groove of the belt conveyor, while, from the predetermined value. Granules with low sphericity are
It stays in the sorting groove or is reduced in rolling speed and is eliminated in the running direction of the belt. Therefore, since the granules are sorted by rolling or staying in the sorting groove, the granules are not clogged, and the granules judged to have good sphericity are in the inclination direction of the belt conveyor. Since it rolls downward as it spreads, it is possible to obtain the effect that the layout of the second selection means in the subsequent stage can be freely set without newly providing a means for expanding the particles. Further, by providing the second selection means, it is possible to select the particles having a desired diameter dimension among the particles determined to have a good sphericity and have a spherical shape, so that the selection property of the particles is further improved. The effect of doing is also obtained.

[Brief description of drawings]

FIG. 1 is a side view of a particle sorting device.

FIG. 2 is a plan view of a particle sorting device.

FIG. 3 is a schematic perspective view of a first selection unit.

FIG. 4 is a schematic plan view showing a pair of selector rollers.

FIG. 5 is a diagram showing a flow of beads in a second sorting section.

FIG. 6 is a schematic plan view showing another pair of selector rollers.

[Explanation of symbols]

 10 Body Frame 11 Bead Hopper 12 Drum Hopper 13 First Sorting Section 14 Second Sorting Section 17 Saucepan 18 Rotating Drum 19 Extraction Groove 21 Belt Roller 22 Conveyor Belt 24 Frame Stand 25 Sorting Groove 27 Defective Product Collection Box 28 Delivery Plate 29 Connection Shooter 30 Flow Dividing Guide 31 Roller Frame 32 Selector Roller 34 Selector Gap 40 Supply Port 43 Recovery Shooter 50 Good Product Recovery Box 51 Defective Product Recovery Case

Claims (2)

[Claims] 1. A belt conveyor inclined at a predetermined angle in the width direction, a selection groove provided on the belt surface of the belt conveyor at a predetermined interval in the running direction, and above the belt conveyor. The granular material supply means for supplying the granular material on the belt, and the recovery tray connected to the side edge of the belt positioned below in the inclination direction of the belt conveyor are provided, while driving the belt conveyor, Among the particles supplied on the belt by the particle supply means, particles having a high sphericity of a predetermined value or more are collected in the recovery tray by rolling downward along the sorting groove of the belt conveyor, On the other hand, the granular material sorting device is characterized in that the granular material having a sphericity lower than a predetermined value stays in the sorting groove or is reduced in rolling speed and is eliminated in the running direction of the belt. 2. The recovery tray serves as a shooter that connects the belt conveyor and a second sorting means provided later, and the second sorting means is arranged below the shooter and is arranged in a rotation axis direction thereof. A pair of slanted rollers, a sorting gap formed between the rollers, the spacing being wider as it goes downward in the slanting direction, and provided in the lower part of the central portion when viewed in the longitudinal direction of the sorting gap, And a receiving tray for receiving the particles dropped from the sorting gap, wherein the particles supplied from the shooter between the pair of rollers are
2. The rolling tray moves along the sorting gap and drops below the sorting gap, and only the particles having a diameter within a predetermined range are collected by the receiving tray.
The granular material sorting device described in.