JPS6391183A - Disk rotary type cereal grain selector - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for sorting brown rice from mixed rice after hulling by rotating a plurality of doughnut-shaped disks each having a large number of recesses on the surface. The present invention relates to the structure of a grain sorting device configured to do the following.

[Conventional technology]

A rotating shaft is supported in a substantially horizontal manner in the sorting cell, and a plurality of donut-shaped disks each having a plurality of recesses formed on one or both sides are provided on the rotating shaft at appropriate intervals in the axial direction,
The sorting cell is provided with a supply section for a mixed rice of paddy and brown rice at one end in the axial direction, and a paddy discharge section at the other end, and a brown rice receiving gutter is provided between each of the disks. A disk rotary grain sorting device comprising a rotary disk type grain sorting device has been proposed in Japanese Patent Application Laid-open No. 136688/1988 as a prior art.

In the disk rotating grain sorting device, the mixed rice fed into the sorting cell from the supply section at one end is lifted up to a height formed by the rotation of the disks in the area between the disks, and then falls. When the flow is repeated, the brown rice in the fluidized bed fits into the recess in the disk and falls from a high position. This is used to catch the brown rice falling from a high position into the brown rice receiving gutter and take it out. It is.

Therefore, the brown rice in the fluidized bed is removed with each disk, leaving only the paddy in the sorting cell.
The thickness and height of the fluidized bed of mixed rice formed between each disk is thicker on the side of the mixed rice supply section and becomes thinner as it goes toward the paddy discharge section.

[Problem that the invention seeks to solve]

In this type of grain sorting device, when the intervals between the disks are constant and fixed as in the prior art, if the amount of mixed rice supplied per unit time from the mixed rice supply section is too large. , the thickness and height of the fluidized bed at various locations within the sorting cell may become thicker than necessary;
If the number of revolutions of the disk is high, the height of the fluidized bed lifted by the disk becomes too high, which causes problems such as the possibility of contamination of rice into the brown rice receiving trough and poor sorting accuracy.

On the other hand, when the amount of mixed rice supplied is too small or the rotation speed of the disk is low, the thickness of the fluidized bed at various locations in the sorting cell becomes too thin, and the amount of brown rice lifted toward the brown rice receiving trough by the rotation of the disk decreases. The selection ability of each disk cannot be fully utilized due to the small number of disks.

In order to solve this problem, when the intervals between the disks are fixed, both the amount of mixed rice supplied and the rotational speed of the disks must be adjusted, which is delicate and difficult to control.

The present invention aims to solve this problem.

[Failure to solve the problem]

In order to achieve this object, the present invention disposes a plurality of donut-shaped disks each having a large number of recesses formed on the surface thereof at appropriate intervals on a rotating shaft disposed horizontally within a sorting cell. , in a disc rotating grain sorting device, wherein the sorting cell is provided with a supply section for a mixed rice of paddy and brown rice, and a discharge section for paddy, and a brown rice receiving trough is arranged between each disk. , each of the disks is manually fitted along the longitudinal direction of the rotating shaft, and an adjustment means is provided between each disk to adjust the spacing of the disks at the same time; It is provided with operating means for operating the means.

[Action/effect of the invention]

In this way, each disk in the sorting cell is fitted so as to be slidable along its longitudinal direction with respect to the rotation axis, and an adjustment means is provided between each disk that can expand and contract the interval between the adjacent disks. Because of this, the rotation speed of each disk is kept high and constant, and when the amount of mixed rice supplied is large, the distance between the disks is widened, and when the amount of mixed rice supplied is small, the distance between the disks is narrowed. By adjusting the spacing between all disks at the same time, it is possible to maintain a constant sorting accuracy while improving the sorting ability.

In addition, even if the amount of mixed rice supplied is constant, when the rotation speed is reduced, the disc spacing is narrowed, and when the rotation speed is increased, the spacing is widened, so that the sorting accuracy can be maintained at a constant level. At the same time, the sorting ability can be freely adjusted, and it can quickly respond to different types of grain.

As described above, according to the present invention, it is possible to easily improve both the sorting capacity and the sorting performance of a rotary sorting device by simply adjusting the disc spacing. Since they can be adjusted all at once using the operating means, the adjustment effort is extremely simple.

In addition, when the spacing adjustment means is composed of a spring, by appropriately setting the spring constant and free length of the spring, it is possible to set the degree of spacing change in each of the plurality of disks to be the same or to be different from each other. It has a remarkable effect.

〔Example〕

Below, the drawings of an embodiment in which the present invention is applied to a grain sorting mechanism 61 in a hulling sorting machine will be explained. After the mixed rice is sorted by wind sorting into rice husks and mixed rice, the mixed rice is sorted into brown rice and paddy by a disk 11 arranged horizontally in the body 2C of the sorting cell 2. The lower half of the body 2C is formed into a substantially cylindrical shape, and the sorting cell 2 is provided with a supply part 4 in the upper part of the body 2C at a position closer to the negative side plate 2a, and a discharge part 5 in the other side plate 2b. has been done.

Further, a mixed rice thrower from the wind sorting section is connected to the homper 6 connected to the supply section 4, while the paddy discharged from the discharging section 5 is transferred to the discharging section 5. A reflux chute 7 is connected for reflux into the feed hopper.

Furthermore, a residual rice discharge valve (not shown) is provided on the bottom surface of the body 2C of the sorting cell 2 so as to be openable and closable.

Inside the sorting cell 2, a rotating shaft 10, which is rotationally driven by a motor at an appropriate speed, is supported substantially horizontally on both left and right side plates 2a and 2b parallel to the axis of the sorting cell 2. , there are a plurality of donut-shaped disks 11 carved at appropriate intervals along the axial direction, each having a large number of recesses 12 on one or both sides of which the brown rice fits, but the paddy does not. A spline is formed on the outer periphery of the rotating shaft 10, and the boss portion 11a of each disk 11 is fitted so as to be slidable along the axis of the rotating shaft 10.

An adjusting means 16 is provided between each of the disks 11 to freely adjust the interval (H) in the axial direction of the rotating shaft 10 of the disks 11, and the adjusting means 16 is provided outside the sorting cell 2. A manual operation means 17 is provided for operation.

In one embodiment, as shown in FIGS. 2 and 4, the adjusting means 16 is constituted by a compression spring 18, and the operating means 17 moves the disk 11 closest to the discharge section 5 side to the supply section 4 side. The distance (H) of all the disks 11 can be changed simultaneously by pressing the boss portion 11a of each disk 11.
A seat 19 that is slidably fitted at least to the splined rotating shaft 10 is brought into contact with both the front and back surfaces of the rotating shaft 10, and the outer periphery of the rotating shaft 10 is placed between the disk 11 facing the supply section 4 and the adjacent disks 11. A compression spring 18 loosely fitted is installed.

Then, the disk 11 located closest to the ejection section 5 side
A fork 21 is connected to the outer periphery of a pressing flange 20 that is rotatably and slidably fitted on the rotating shaft 10, and the other end of the fork 21 is attached to the side surface of a rotatable gear 22. The gear 22 is pivotally mounted and meshed with a worm 24 which is rotationally driven by a manual handle 23.

Note that the spring constant and free length of each compression spring 18 can be set arbitrarily in terms of design, as will be described later.

Further, a large number of recesses 12 engraved on both sides of each disk 11 are formed on the disk 11 as shown in FIGS. 5 to 7.
It has an elongated semicircular shape in which the length dimension in the circumferential direction in 1 is larger than the width dimension S in the radial direction of the disk 11, and the width dimension 8 in the radial direction is smaller than the length dimension of brown rice. While the dimension is set to be larger than the width dimension,
Left and right stomach inner surfaces 12a, 1 in the longitudinal direction in each recess 12
2b, the inner surface 12a located on the front side with respect to the disk rotation direction is formed into an inclined surface at an appropriate angle θ (for example, about 15 degrees), and the other side is formed from the intersection of this inclined inner surface 12a and the bottom surface 12C. The length L1 to the inner surface 12b of
The length dimension of the recess 12 is approximately equal to the length dimension of brown rice, and the length dimension is set to be intermediate between the length dimension of brown rice and the length dimension of paddy, and the depth T of the recess 12 is equal to the diameter of brown rice. The dimensions are set to be approximately equal to.

Brown rice receiving troughs 13 are inserted in an inclined manner in the upper portions between the disks 11 and between the disks 11 and the side plates 2a and 2b of the sorting cell 2, and the lower ends of the brown rice receiving troughs 13 are The brown rice removal chute 15 communicates with a brown rice sorting section (not shown).

Each brown rice receiving trough 13 is slidably fitted onto a support shaft 14 having a rectangular cross section and arranged parallel to the rotating shaft 10.

The rice that has been dehulled in the hulling section is then air sorted in the wind sorting section so that the rice husks are sucked into the suction dust fan. The mixed rice from which the rice husks have been removed by wind sorting is supplied from the mixed rice thrower into the sorting cell 2 from a supply section 4 located above the position closer to the plate 2a, for example.

The mixed rice thus supplied into the sorting cell 2 is raised between the rotating disk 11 to a certain height as shown by the dashed line arrow A in FIG. At the same time, it is transferred toward the discharge section 5.

Then, the brown rice in the mixed rice is fitted into the recess 12 of each disk 11 and lifted up to a high position, and then
2, the brown rice is sorted to fall into the brown rice receiving channel 13.

During this sorting work, if the spring constant and free length of each of the compression springs 18 disposed between the disks 11 are all set to be the same, the pressing force from the operating means 17 will
All the compression springs 18 are compressed by the same dimension, and therefore, the disks 11 facing the supply section 4 and each disk 11 are moved toward the supply section 4 in a narrowed state by the dimensions of the disks 11 facing the supply section 4 . If the supply of mixed rice is constant,
The thickness of the fluidized bed A at any location within the sorting cell 2, such as between the disks 11, can be adjusted to a predetermined thickness.

As shown in FIG. 8, the brown rice receiving gutter 13 disposed between each disc 11 is provided to be slidable along the spindle 14, and a material such as rubber is attached to the left and right edges of each brown rice receiving gutter 13. By attaching flexible seal pieces 25 and making each seal piece 25 contact the surface of the disk 11 having the recess 12, even when the distance between the disks 11 changes, the brown rice receiving gutter 13 The gap between the disc 11 and the disc 11 can be kept substantially constant at all times.

Moreover, if the compression springs 18 having the same spring constant and different free lengths are mounted with the longer free length on the supply section 4 side and the shorter ones on the discharge section 5 side, Operation means 1
7, the distance between adjacent disks 11 in the supply section 4 is wide (and becomes narrower toward the discharge section 5, but when the pressure is increased, the distance between adjacent disks 11 on the supply section 4 side is wide) The amount of reduction in the distance between the disks 11 is large, and the amount of reduction decreases toward the ejection part 5 side, so that the distance between the disks 11 can be changed in a direction in which the width becomes narrower and the distance is equal.

Furthermore, as another embodiment, the compression springs 18 having different spring constants and the same free length are mounted on the supply section 4 side, such as the strong spring 18a having a large spring constant, in other words a strong spring 18a having a small spring constant. If a short weak spring 18b is mounted on the discharge section 5 side, when the pressing force by the operating means 17 is weak, the spacing between adjacent disks 11 on the supply section 4 side is equal, but when the pressing force is increased, the supply The distance between adjacent disks 11 in Example 4 is small, and the distance between the disks 11 on the supply section 4 side is smaller, and the distance between disks 11 on the supply section 4 side is smaller. It is also possible to change and adjust the spacing between the disks 111 in the five discharge portions to be smaller than that in the discharge section 5, thereby increasing the thickness of the fluidized bed A at that location. By changing the width as shown in FIG. 4, the width (H1') and (H2') of each location after pressing can be freely adjusted.

Furthermore, the configuration may be such that the operating means 17 is provided on the supply section side and the compression spring 18 is discharged.

In addition, the spacing adjustment means 16 can be replaced with the compression spring 18 and configured with a tandem type pneumatic actuator. In that case, the rotating shaft 10 itself can be omitted and a disk is fixed to each expanding and contracting part of the actuator. It is also possible to do so, and the operating means for this actuator may be attached to the sorting cell 2.

In this manner, according to the present invention, it is possible to maintain the sorting performance of the disks 11 at various locations in the sorting cell 2 at a predetermined maximum state, and also to maintain the sorting performance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view of the sorting device, FIG. 2 is a sectional view taken along line nn in FIG. 1, and FIG. 3 is a sectional view taken along line 111 in FIG. 1. , Fig. 4 is an enlarged sectional view of the main part of Fig. 2, Fig. 5 is an enlarged plan view of the main part of the disk, Fig. 6 is a sectional view taken along the line V-V of Fig. 8 is a side view of the main part of FIG. 2. 2... Sorting cell, 2a, 2b... Left and right side plates, 2c... Body of sorting cell, 4... Supply section,
5... Discharge section, 10... Rotating shaft, 11...
Disc, 11a...boss part, 12...recess,
13... Brown rice catcher, 14... Support shaft, 16...
- Adjustment means, 17... Operating means, 18... Compression spring, 19... Seat, 21... Fork, 23
...Manual handle, 22...Gear, 24...
・Warm, 25...Seal.

Claims (2)

[Claims] (1) A donut-shaped disk with many recesses formed on its surface is mounted on a rotating shaft arranged horizontally in a sorting cell.
While a plurality of sheets are arranged at appropriate intervals, in the sorting cell,
In a disk rotary grain sorting device, which is provided with a supply section for a mixed rice of paddy and brown rice, and a discharge section for paddy, and a brown rice catcher between each disk, each disk is connected to a rotating shaft. The discs are fitted manually along the longitudinal direction, and an adjusting means is provided between each disk to adjust the spacing of the respective disks simultaneously, and the sorting cell has an operation unit for operating the adjusting means. A disk rotating type grain sorting device characterized by being provided with means. (2) An adjustment means consisting of a compression spring is installed between each of the disks to adjust the spacing of the disks all at once, while the sorting cell is equipped with adjusting means to adjust the spacing of the disks against the spring force. 2. A control device for a rotary disk type grain sorting device according to claim 1, further comprising operating means for simultaneous adjustment.