JP3265560B2 - Grain swinging sorting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating grain sorter.

[0002]

2. Description of the Related Art As a grain sorter in which an inclined sorting net is swung in a horizontal direction, a grain sorter described in JP-B-64-6829 has been known.

In this sorting machine, an upper swing frame and a lower swing frame provided with a sorting net having a higher supply side and a lower discharge side are swung by a horizontal circular motion imparting mechanism attached to an end of the supply side. In addition to the above, a lower net is further provided below the sorting net, and a clogging prevention ball is inserted between both nets.

[0004]

However, in the above-mentioned conventional sorting machine, the swing of the sorting net is such that the supply side is made to move in a horizontal circular motion and the discharge side is made to move back and forth. Although the horizontal rocking motion works strongly and is highly effective in spreading, in brown rice and white rice, which are more fluid than paddy, small rice etc. mixed in floated on the surface or mixed in the middle There is a problem in that it flows down as it is and the sorting efficiency is reduced.

In the above-mentioned sorting machine, a lower net is further provided below the sorting frame and below the sorting net, and an anti-clogging ball is inserted between the lower net. Therefore, the swinging motion only in the horizontal direction does not easily give a vertical movement to the sphere, and therefore has a drawback that a sufficient impact action cannot be given to the sorting net.

Further, in this type of sorting machine, it is required to change the degree of sorting (accuracy). To this end, spare sorting nets having different mesh sizes are prepared and necessary. This means that the cost can be increased and the work is troublesome, since it can be replaced and used.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the above-described conventional rocking and sorting machine. The swinging motion of the sorting frame is controlled by moving the supply side back and forth, and circularly moving or moving the discharge port side. In addition to the elliptical movement, even in the case of horizontal swinging movement, the clogging prevention ball causes unspecified vertical movement, and an impact action is given to the entire sorting net, so that sorting efficiency is improved. And the clogging of the sorting net can be reliably prevented, and the inclination angle of the sorting net can be adjusted freely, so that the same sorting degree can be achieved without replacing the existing machine with a spare net. And a swing sorter which has a simplified structure and can be manufactured at a low cost.

[0008]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The present invention moves the rear portion of the frame 1 in the front-rear direction. The swing frame 2 coupled to a swing imparting device 4 that freely supports and moves the front part in a horizontal circular motion by an eccentric shaft 9,
A sorting net 6 is provided above a bottom plate 16 provided with a large number of irregularities 20 at intervals on the upper surface, and a sorting frame 5 containing clogging prevention balls 23 between the bottom plate 16 and the sorting net 6 is provided. The supply side, which is the rear part, is inclined high while the discharge side, which is the front part, is inclined low, and the front part is rotatably mounted on the front part of the swing frame 2 by means of a horizontal shaft 24. 2 and a rear portion thereof is attached so as to be movable up and down so as to be adjustable, so that the tilt angle of the swing frame 2 can be adjusted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. 1 and 2 show an embodiment of the machine of the present invention, and FIG. 3 is a diagram showing a motion trajectory of the sorting network.

1 and 2, reference numeral 1 denotes a frame, and 2 denotes a swing frame provided in a frame 1 so as to be horizontally swung by a swing applying device 4 rotated by a motor 3. In the swing frame 2, a sorting frame 5 having a sorting net 6 is provided.

A vertical axis 8 rotated by a motor 3 is supported by a shaft cylinder 7 attached to a front portion of the frame 1, and an eccentric shaft 9 eccentric to the vertical axis 8 at the upper end thereof. The eccentric shaft 9 is axially mounted on a bearing 10 provided at the front center of the swing frame 2 at the center in the width direction. Also,
At the rear of the frame 1, there are provided supports 11, 11 on both sides of the lower surface of the rear portion of the swing frame 2. On the rear of the swing frame 2, rollers 12 having the lower surface provided on the supports 11, 11 are provided. , 12 so as to be freely movable in the horizontal direction. Further, in the center of the lower surface of the rear part of the swing frame 2, the longitudinal direction (front-back direction)
A guide body 13 provided with a long groove 14 is provided along the long groove.
A guide shaft 15 erected on the frame 1 is engaged with 14.

The sorting frame 5 is formed in a box shape, and a sorting net 6 is stretched above the bottom plate 16 at a required distance, and is arranged in front of the sorting net 6 on the discharge side. An outlet 17 for grain rice (good rice) is provided, and a flat mountain-shaped dispersion plate 18 is provided at the rear of the sorting net 6 on the supply side. In addition, a small rice discharge port 19 is provided at the front end of the bottom plate 16, and a number of projections or projections 20, 20 such as ridges are provided on the upper surface of the bottom plate 16, and the bottom plate 16 and the sorting net 6 are provided. The upper and lower parts are divided into small chambers 22 and 22 which communicate with each other by a large number of partition plates 21 and 21, and anti-clogging balls 23 and 23 are accommodated in the small chambers 22 and 22.

The sorting frame 5 is inclined with respect to the swing frame 2 such that the front discharge side is low and the rear supply side is high, and the front portion thereof is disposed so as to protrude from the swing frame 2. The part is rotatably attached to the front part of the swing frame 2 by horizontal shafts 24, 24, and the rear part is attached so as to be movable up and down by engagement of the elongated hole 25 and set screws 26, 26, The inclination angle can be adjusted.

A hopper 27 for supplying cereals to be sorted is disposed above a rear end on the supply side of the sorting frame 5, and a shutter opened and closed by a lever 29 is provided at a lower end opening 28 of the hopper 27. 30 are provided. Also this hopper
The opening 27 is preferably formed to be horizontally long so as to cover almost the entire width of the sorting net 6, as shown by a chain line in FIG.

In the above-described sorting machine, raw material grains to be sorted, for example, rice grains, are supplied from a hopper 27 to a supply side, which is the rear end of the sorting frame 5, and are fed onto a sorting net 6 inclined by a dispersion plate 18. It will be spread. An intermediate portion of the sorting frame 5 is horizontally circularly moved by the eccentric shaft 9 of the swing applying device 4, but the supply side, which is a rear portion thereof, engages the guide shaft 15 with the long groove 14 of the guide body 13. As shown in FIG. 3, the movement of the sorting net 6 stretched on the sorting frame 5 is a circular movement at the intermediate portion thereof. The side moves back and forth, and the discharge side moves in a horizontally long oval shape. For this reason, on the supply side, the flow down and back to the rice grain by the back and forth movement acts, and in the flow down action, the movement of the rice grain is fast, and in the pull back (pulling) action, the movement of the rice grain is slow. Then, the rectification is easy to roll, so the movement is large, the small rice and broken rice are irregular and the movement is small, and as the movement is repeated, the rectification flows down the upper surface, and the small rice and broken rice sink It flows down in contact with the sorting net surface, and is sorted and dropped on the bottom plate 16 through the mesh.

The rice grains which have been subjected to the sorting and separating actions while flowing down from the supply side in this way have a small amount of small rice mixed in as they approach the discharge side, and it is difficult to gradually sort out small rice from the rice grains. State. However, sorting net 6
As it moves to the discharge side, it gradually changes to circular motion and oblong elliptical motion, increasing the lateral movement of rice grains and dispersing them, the rice grains tend to stagnate, and the sorting efficiency is improved Will be.

The crushed rice and broken rice separated from the sized rice and dropped on the bottom plate 16 flow down on the bottom plate 16 and are taken out of the small rice outlet 19 through the sized rice discharge outlet 17. It is taken out of the machine.

Since the bottom plate of the sorting frame 5 is provided with irregularities 20, 20, the anti-clogging balls accommodated in each of the small chambers 22 are provided.
In 23, the swinging motion of the selection frame 5 repeatedly repeats the flip-up, thereby giving an impact to the selection net 6 to prevent the net from being clogged with small rice or the like.

The effect of the above-mentioned sorting action has been confirmed through many experiments. According to this, the sorting efficiency depends on the trajectory of the swinging motion of the sorting net 6, and the motion depends on the relative position of the guide shaft 15 and the eccentric shaft 9 with respect to the sorting net 6 and the circular motion amplitude due to the eccentric shaft 9. Involved.

If the amplitude (diameter) of the circular motion by the eccentric shaft 9 is d, and the maximum amplitude of the ellipse at the tip of the sorting net 6 on the discharge side is D, the relationship between d and D is as follows: 1.2
It is preferable to set the position of the vertical axis 8 and the guide axis 15 with respect to the sorting net 6 so that such a relationship occurs. Then, assuming that the positional relationship between the contact point and the tip of the guide shaft 15 of the sorting net 6 is L, the position of the vertical axis 8 is 1 / 2L to 1 / 3L from the tip.
It is better to set the range.

The degree (accuracy) of grain sorting by the sorting frame 5 is determined by the mesh size of the sorting net 6. Naturally, small rice and broken rice having a size smaller than the mesh size fall from the mesh and are discharged out of the machine through the discharge port 19, and grains larger than the mesh are discharged as good rice from the rectified rice discharge port 17. However,
The degree of selection changes depending on the flow speed of the grains flowing down on the selection screen 6. That is, if the falling speed is slow and the stagnation of the grains on the sorting net 6 is long, the degree of sorting is high, and if the falling speed is fast and the stagnation is short, the degree of sorting is low.

In this sorting machine, the sorting frame 5 has a front portion rotatably mounted by a horizontal shaft 24, and a rear portion thereof is vertically adjustable by engagement of a slot 25 and a set screw 26. Therefore, it is possible to adjust the inclination angle of the sorting frame 5 appropriately by adjusting the rear part up and down as necessary, and by adjusting the inclination angle, it is adapted to the type and quality of the grain. Sorting or adjustment of the degree of sorting can be easily performed.

[0023]

As described above, according to the swing sorting machine of the present invention, a sorting net is provided above a bottom plate having a large number of irregularities on the upper surface, and clogging is prevented between the bottom plate and the sorting net. The sorting frame housing the balls is mounted on the swing frame with the rear supply side high and the front discharge side inclined low, and the rear portion of the swing frame is movably supported in the front-rear direction on the frame. In addition, since the front part of the swing frame is connected to a swing applying device that makes a horizontal circular motion by an eccentric shaft, and the tilt angle can be adjusted freely, there are many excellent effects as follows. To play.

(1) The sorting net changes its movement sequentially from the supply side to the discharge side of the rice grain in the order of longitudinal movement, horizontal circular movement, and horizontal elliptical movement by the rotation of the eccentric shaft of the swing applying device and the guide shaft. So, the flow down and pull back action on the rice grain, rectification and separation of small rice and broken rice, sorting is promoted, and the sorting efficiency in the initial stage of sorting is improved,
In the middle to late stages of the sorting, the movement in the horizontal direction increases, so that the sorting can be prevented from being omitted, and an excellent sorting effect can be obtained as a whole.

(2) Due to the swinging of the sorting frame, the anti-clogging balls accommodated between the bottom plate and the sorting net can hit the unevenness of the bottom plate and bounce up, giving an impact to the sorting net. Good clogging prevention effect.

(3) In the conventional swing sorter, a lower net is provided between the bottom plate and the sorting net. However, in the present invention, it is not necessary to provide such a lower net. The structure is simplified, and the production cost can be reduced.

(4) Since the inclination angle of the selection frame can be freely adjusted, a selection frame having a different mesh size is replaced each time to change the selection degree as in the conventional machine. There is no need for this, and work can be performed efficiently, and costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of the present invention.

FIG. 2 is a plan sectional view of the same.

FIG. 3 is a movement trajectory diagram of a sorting net.

[Description of Signs] 1 Frame 2 Swinging frame 4 Swinging device 5 Sorting frame 6 Sorting net 8 Vertical axis 9 Eccentric shaft 13 Guide body 14 Long groove 15 Guide shaft 16 Bottom plate 17 Sizing discharge port 19 Small rice discharge port 20 Unevenness 22 Small chamber 23 Anti-clogging ball 24 Horizontal axis 25 Long hole 26 Set screw 27 Hopper

Claims (1)

(57) [Claims] An oscillating frame coupled to an oscillating device that supports a rear portion of a frame so as to be movable in the front-rear direction and a horizontal portion of the front portion by an eccentric shaft has a large number of projections and depressions on an upper surface thereof. A sorting net is provided above the bottom plate provided with, and a sorting frame body containing anti-clogging balls between the bottom plate and the sorting net is inclined with the supply side at the rear high and the discharge side at the front low. At the same time, the front part is rotatably attached to the front part of the swing frame by a horizontal shaft, the front end part of the front part is projected forward from the swing frame, and the rear part is vertically adjustable to be movable. A swing sorter for grain, wherein the tilt angle of the swing frame is adjustable.