JPH0734895B2 - Stone removal sorter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stone removing and sorting machine for removing pebbles contained in grains such as rice and wheat.

[Conventional technology]

In a conventional stone removing sorter, for example, Japanese Patent Publication No. 58-53590
As shown in FIG. 6 (see FIG. 6), a windmill box 100 having a large number of blowholes 101 is placed on the upper edge of a windmill box 100 having a built-in windmill with a gentle inclination. A vibration mechanism is connected to the wind turbine box 100 and the sorting board 102 to integrally vibrate, and the sorting board 102 is vibrated by the vibration action and the blast action from the blast holes 101.
The upper grain is discharged from the refined product discharge port 103 at the lower end of the slope, and the stone fragments contained in the grain are discharged from the stone removal port 104 at the upper end of the slope for sorting.

Also, as another example of the sorting board of the stone removing sorter, Japanese Patent Publication No.
Some of them are disclosed in Japanese Patent Publication No. 36103 and those disclosed in Japanese Utility Model Publication No. 55-55176, and Japanese Patent Publication No. 54-36103 (see FIG. 7) is a perforated plate 105 having a rectangular shape in plan view.
A small stone outlet 107 is provided at the center of one side wall 106
The eye 108 near 106 is formed so as to open in the direction of the stone outlet 107 to blow out air. On the other hand, the one in Jitsuko Sho 55-55176 (see Fig. 8) is a sorter whose plane shape is almost rectangular.
Inside the vicinity of the partition wall 110 on the high side of 109 is a perforated plate 113 having a step and a low height and having a ventilation port 112 for blowing air toward the outlet 111, and at the end of the perforated plate 113. Is a stone outlet
114 is formed, and this stone discharge port 114 is provided with a ventilation port 115 for blowing wind in the discharge direction of stone debris.

[Problems to be solved by the invention]

By the way, all of the stone removing sorters shown in FIG. 6 to FIG. 8 are so-called specific gravity sorters, which utilize the difference between the specific gravity of grains (about 1.4 for rice grains) and that of stones (about 2.5). The stones in the grain are gradually rocked up by the stone removing port 104, the stone outlet 107, and the stone discharging port 114, and when the stones have accumulated to some extent, they try to discharge only the stones. Among them, a stone having a small specific gravity may be mixed into the grain again even if it is shaken by the stone removing port 104, the stone outlet 107, and the stone discharging port 114. In other words, not all stones are reliably collected in the stone removing port 104, etc.
The flow of "going back and forth" is repeated for 4 mag, etc., and it was difficult to completely sort out even stones with a low specific gravity.

In view of the above, it is a technical object of the present invention to provide a stone removing and sorting machine capable of completely sorting and removing stones once collected in the stone extracting portion.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention mounts a sorting board, which has a large number of projections and blowholes, on the upper part of a fan case oscillatingly supported in a machine frame with a gentle inclination, In a stone removing / sorting machine in which the upper and lower ends are opened and the inclined lower end is formed as a refined product outlet and the inclined upper end is formed as a mixed grain dropping port, The sorting board is provided with a blocking device which is formed by raising a part of the sorting board so that the slanted lower end serves as a refined product return port, the slanted upper end serves as a stone removing port, and the stone is retained at the stone removing port to some extent. Provide a secondary sorting board.

B. A gutter is provided at the mixed grain dropping port.

C. The gutter and the secondary sorting board were connected by a grain elevator.

I took the technical means.

[Work]

Of the grain supplied to the sorting board with the blast and the vibration action,
Most of the refined products are discharged from the refined product outlet at the lower end of the slope to the outside of the machine, and the remaining mixed grains of the refined product and stone fall into the trough from the mixed grain drop port at the upper end of the slope. The mixed grain in the receiving trough is sent up by a grain lifting machine and supplied to the secondary sorting board. Jets and vibrations are also applied to the secondary sorting board, the refined products in the mixed grains are returned to the sorting board from the refinement return port at the lower end of the slope, and the stones are rocked up by the protrusions to the stone removing outlet side and the blocking device is provided. The stones are piled up because they are stopped. Then, when the stones are sufficiently accumulated near the stone removing port, the blocking device is released to remove the stones.

Example of Invention

 A preferred embodiment of the present invention will be described with reference to the drawings.

The stone removing sorter 1 is formed by a box-shaped machine frame 2,
A supply hopper 3 is provided at a substantially central portion of an upper surface wall of the machine frame 2 (see FIG. 1). An opening 4 is opened at the lower end of the supply hopper 3, and a shutter plate 5 for opening and closing the opening 4 is slidably provided, and an operating rod 6 for operating the shutter plate 5 is provided so as to project outside the machine frame 2.

A fan case 7 is provided in the machine frame 2 so as to be swingable.
That is, the spindles 8 and 9 are welded to the wall surface of the fan case 7,
Both ends of the support shaft 8 are supported by bearings 10,10, the bearings 10,10 are fixed to one ends of the swing arms 11,11 respectively, and the other ends of the swing arms 11,11 are fixed to the support shaft 12, Both ends of the support shaft 12 are pivotally supported by bearings 13, 13 fixed to both side walls of the machine frame 2. Similarly, both ends of the support shaft 9 are supported by bearings 14 and 14, and the bearings 14 and 14 are fixed to one ends of the swing arms 15 and 15, respectively, and the other ends of the swing arms 15 and 15 are provided to the support shaft 16.
Both ends of the support shaft 16 are pivotally supported by bearings 17, 17 fixed to both side walls of the machine frame 2.

A vibrating mechanism for imparting a vibrating action to the fan case 7 which is thus swingably supported in the machine frame 2 will be described. A crankshaft 19 which receives a rotational force by the crank pulley 18 is rotatably supported by one side wall of the machine frame 2 and a support plate 20, and an eccentric part of the crankshaft 19 and a mounting plate 21 of the fan case 7 are connected to a crank arm 22. By this, the fan case 7 vibrates diagonally up and down as shown by an arrow W with the support shafts 12 and 16 as fulcrums.

An upper portion of the fan case 7 is opened and a sorting board 23 is mounted on the upper portion. Further, an intake port 24 is opened on both side walls of the fan case 7, and the fan shaft 25 penetrates through the intake port 24 and is rotatably supported by both side walls of the machine casing 2. A fan 26 is fixed to the fan shaft 25, and a fan pulley 27 is attached to one end of the fan shaft 25. The fan pulley 27 and the crank pulley 18 are rotated by an electric motor 28 so that the motor pulley of the electric motor 28 is rotated. 29, the crank pulley 18, and the fan pulley 27 are interlockingly connected by a V belt 30.

Next, the sorting board 23 will be described with reference to FIG. The sorting board 23 is placed on the upper part of the fan case 7 with a gentle inclination, and a large number of air blow holes are formed over the entire surface of the sorting board 23.
31 and a projection 32 formed by being connected to the lower side of the squirt 31. Further, side walls 33, 33 are provided upright on both sides of the sorting board 23 in the slanting direction, the upper end and the lower end of the slant are opened, the upper end is the mixed grain dropping port 34, and the lower end is the refined product outlet.
It is as 35.

A secondary sorting disc 36 is formed near the mixed grain drop port 34 of the sorting disc 23. That is, a part of the sorting board 23 is raised to form a board surface of a secondary sorting board 36 having a large number of blowholes 31 and projections 32, and side walls 37 and 37 are erected on both sides in the inclination direction of the board surface. At the same time, the lower end of the slope is opened as a refined product return port 38 and the upper end of the slope is formed as a stone removing port 39. The stone removing port 39 is provided with a rotary valve 40 as a shutoff device for retaining the stone to some extent. The rotary valve 40 has an arc shape (see FIG. 4) and is mounted so as to open and close the stone removing port 39. That is, the rotary valve 40 is provided below the plate surface of the secondary sorting board 36 so as to be rotatable by the rotary shaft 41. Rotation axis
41 is penetrated and supported by the side wall 37, and the lever 42 is fixed to the end portion. One end of the lever 42 is connected to the solenoid 43, and the rotation valve 40 is rotated by the operation of the solenoid 43 to open and close the stone removing port 39. A stone detector consisting of a light emitting element and a light receiving element is located near the lower end of the sloping exit 39.
When 44 is attached and the stone detector 44 detects the presence of stone,
The solenoid 43 is excited, the rotary valve 40 is activated, and the stone removal port 39
The stone detector 44 and the solenoid 43 are electrically connected to each other so as to open.

The mixed grain flow-down port 34 of the sorting board 23 is provided with a gutter 45 that conveys a mixed grain of grains and stones falling from the mixed grain drop port 34, and a discharge port 45a of this gutter 45 and a grain lifting machine. As a lower 4
6 supply ports 47 are connected. Since the gutter surface of the gutter 45 was provided with a large number of blowout holes facing the discharge port, the mixed particles are fed laterally by blowing the air from the fan case 7, or the discharge port 45a side is simply lowered. You may make it flow down. The end of the discharge pipe 48 of the thrower 46 faces slightly above the secondary sorting board 36. Further, the lower 46 is fixed to the machine frame 2, and the pulley 49 and the crankshaft 19 of the lower 46 are attached.
A pulley 50 mounted on the shaft is linked by a V belt 51.

The secondary sorting board 36 is provided with a transport gutter 52 which is connected to the stone removing port 39 and has a non-porous and rough surface, and a stone discharging gutter 53 is provided below the end of the transport gutter 52. It is fixedly attached to 2.
An inspection door 54 is provided in the machine frame 2 near the transport gutter 52, while a refined product discharge gutter 55 is provided below the refined product outlet 35, and a lower end of the refined product discharge gutter 55 is opened from an opening 56 provided in the machine frame 2. It is protruding outside the aircraft.

Next, the operation of this embodiment will be described.

Rice grains discharged from a rice milling machine (not shown) are put into the supply hopper 3 by a chute pipe, the electric motor 28 is started, and the operating rod 6
And slide the shutter plate 5 to open the opening 4.

The sorting board 23 vibrates integrally with the fan case 7, and the wind generated by the fan 26 blows out from the blast holes 31 onto the sorting board 23 (Fig. 3). It tends to float from the board surface and flows down to the refined product outlet 35 side while being pressed by the rice grains falling from the supply hopper,
Eventually, it is discharged to the outside of the machine through the refined product discharge gutter 55.

On the other hand, the stone mixed in the rice grains has a large specific gravity, so
It does not float up from the inside, and the projection 32 ...
It is pushed up to the side and finally with a few rice grains, the gutter 45
Fall inside. The stone that fell into the gutter 45 will never be sorted 23
It does not return to the top, and the mixed grain of stone and rice grain is Slower 46
Is fed laterally to the feeding port 47 of the above, is fried by a lower blade (not shown), and is fed to the secondary sorting disc 36.

The mixed grains on the secondary sorting disc 36 are subjected to vibration and blast action similarly to the sorting disc 23, and the rice grains are dropped from the refined product return port 38 onto the sorting disc 23 and again subjected to the sorting action on the sorting disc 23. . Stones 32
Although it is pushed up to the stone removing port 39 side by this, the stone removing port 39 is blocked by the rotary valve 40, and the stones gradually accumulate near the stone removing port 39. Thus the stone exit
If stones accumulate around 39 and become only stones, the amount of light received by the stone detector 44 changes, and this change is output as an electric signal, which energizes the solenoid 43 to activate the rotary valve 40 and The exit 39 is opened to send the stone to the transport gutter 52 side. Transport gutter
The stone conveyed in the inside of 52 by the principle of the vibration conveyor is the stone discharge gutter.
It drops into 53 and is discharged to the outside of the machine.

When the stones are discharged, the mixed particles on the secondary sorting board 36 are swung toward the stone removing port 39 side, the output of the signal from the stone detector 44 is also stopped, and the solenoid 43 is demagnetized and the stones are demagnetized. The outlet 39 is closed again by the rotary valve 40. In this way, Ishitori Exit 39
When the stones in the mixed grains in the vicinity are gradually concentrated and become only stones, the stone removing port 39 is opened to remove the stones.

Although the thrower 46 is used as the grain elevator in the above embodiment, a bucket elevator 57 may be used as shown in FIG. In this case, the mixed grains discharged from the discharge port 45a of the gutter 45 are put into the supply hopper 58, the grains are fried by the bucket 59, and the secondary sorting board is passed through the discharge pipe 60.
It supplies to 36. The bucket elevator 57 is driven by the reduction motor 61. In addition, the discharge pipe 60 of the bucket elevator 57 or the discharge pipe of the lower 46
In some cases, a branch pipe is provided in 48 and a switching valve is provided, and the end of the branch pipe is exposed to the stone discharge gutter 53 or the refined product discharge gutter 55 to promote residual discharge at the end of the operation.

In addition, as another embodiment of the blocking device of the secondary sorting board 36, as shown in FIG. 5, the vicinity of the stone removing port 39 is formed narrow, and the gutter bottom 52a of the transfer gutter 52 is rotated by the rotating shaft 62. In some cases, the gutter bottom 52a is made horizontal by pressing the lever 63 fixed to the rotary shaft 62 so that the stone removing port 39 is opened.

〔The invention's effect〕

As described above, according to the present invention, in the sorting board, a part of the sorting board is raised so that the slanted lower end serves as the refined product return port, the slanted upper end serves as the stone removing port, and stones are retained to some extent in the stone removing port. A secondary sorting board equipped with a shutoff device was provided, and a gutter was further provided at the mixed grain drop port. Since this gutter and the secondary sorting board were connected by a grain elevator, the mixed grain drop of the sorting board was dropped. The mixed grains of stones and rice grains that dropped from the mouth into the trough are supplied to the secondary sorting disc by the grain lifting machine, and the rice grains and stones are carefully selected in this secondary sorting disc, and the rice grains are returned to the sorting disc again. The stones are discharged after being concentrated by the blocking device provided at the stone removing port, and the stones are not mixed into the rice grains, and the rice grains are not discharged together with the stones. In particular, the inclined upper end of the sorting board is made a large opening as a mixed grain drop opening, and the mixed grain of stones and rice grains is dropped into this drop opening to quickly separate the mixed grain from the rice grain on the sorting board. Since the stones in the mixed grains and the rice grains are carefully selected in the secondary sorting disc in which the stones do not return to the rice grains of the sorting disc, even relatively light stones can be reliably sorted and the sorting accuracy is improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a partially enlarged perspective view showing another embodiment of a fried machine, FIG. 3 is a sectional view of a sorting board, and FIG. FIG. 5 is a partially enlarged perspective view, FIG. 5 is a perspective view of another embodiment of the interruption device, FIG. 6 is a perspective view of a conventional example, and FIGS. 7 and 8 are plan views of a conventional selection board. 1 ... Stone removing sorter, 2 ... Machine frame, 3 ... Supply hopper,
4 ... Aperture, 5 ... Shutter plate, 6 ... Actuating rod, 7 ...
… Fan case, 8,9 …… spindle, 10 …… bearing, 11 …… swing arm, 12 …… spindle, 13,14 …… bearing, 15 …… swing arm, 16 …… spindle, 17 …… Bearing, 18 …… Crank pulley, 19 …… Crank shaft, 20 …… Support plate, 21 …… Mounting plate, 22 …… Crank arm, 23 …… Selection panel, 24 …… Intake port, 25 …… Fan shaft, 26 …… fan, 27 …… fan pulley, 28 …… electric motor, 29 …… motor pulley, 30 ……
V-belt, 31 ... Blowhole, 32 ... Protrusion, 33 ... Sidewall, 34
…… Mixed grain drop port, 35 …… Refined product outlet, 36 …… Secondary sorting board, 37 …… Side wall, 38 …… Refined product return port, 39 …… Ishitori outlet,
40 ... Rotating valve, 41 ... Rotating shaft, 42 ... Lever, 43 ... Solenoid, 44 ... Stone detector, 45 ... Gutter, 46 ... Slower, 47 ... Supply port, 48 ... … Discharge pipe, 49,50 …… Pulley, 51 …… V belt, 52 …… Conveyor gutter, 53 …… Stone discharge gutter,
54 …… Inspection door, 58 …… Separate discharge gutter, 56 …… Opening, 57 ……
Bucket elevator, 58 …… Supply hopper, 59 …… Bucket, 60 …… Discharge pipe, 61 …… Deceleration motor, 62…
… Rotary axis, 63 …… Lever.

Claims (5)

[Claims] 1. A sorting board, which has a large number of projections and blowholes, is mounted on the upper part of a fan case oscillatingly supported in a machine frame with a gentle inclination, and the upper and lower ends of the tilting opening are opened. In the stone removing sorter in which the slanted lower end is formed as the refined product outlet and the slanted upper end is formed as the mixed grain dropping port, a part of this sorter is raised in the sorter and the slanted lower end is used as the refined product return port. , The sloping upper end serves as a stone removing port, and the stone removing port is provided with a secondary sorting board equipped with a blocking device for retaining stones to some extent, and further, the mixed grain drop port is provided with a gutter. A stone removing sorter, wherein the secondary sorter is connected by a grain elevator. 2. The stone removing and sorting machine according to claim 1, wherein the grain elevator is a thrower. 3. The stone removing and sorting machine according to claim 1, wherein the grain elevator is a bucket elevator. 4. The stone removing / sorting machine according to any one of claims (1) to (3), wherein the shut-off device is a rotary valve. 5. The stone removing sorter according to any one of claims (1) to (3), wherein the shut-off device is a gutter bottom having a variable inclination angle.