JPH0734894B2 - 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. 8 (see FIG. 8), a sorting board 102 having a large number of blowholes 101 is mounted on the upper edge of a windmill box 100 having a built-in windmill in a slanted manner, and The sorting board 102 is vibrated by connecting a vibration mechanism, and the grain on the sorting board 102 is discharged from the refined product discharge port 103 at the lower end of the slope by this vibration action and the blowing action from the blowhole 101, and The stone pieces contained therein are discharged from the stone removing port 104 at the upper end of the slope to perform sorting.

By the way, if the supply of raw material grains is stopped at the end of work,
The grain on the sorting board 102 has no effect of flowing out from the refined product discharge port 103 while being pushed by the grain to be supplied later, and the sorting board 1 has a rough surface shape due to a large number of blow holes 101.
It is sent to the upper part of the slope by the vibration of 02. And the sorting board
Stone removal port 10 with stone fragments (shoulder 102a becomes a resistance and easily stagnates) near both shoulders 102a on the upper side of the slope of 102
Emitted from 4. In addition, when the board surface of the sorting board 102 is exposed, some wind grains blow upward and scatter. In this way, the discharge of all the grains at the end of the work is very troublesome and there is almost no sorting effect, so if you plan to sort grains of the same type next time,
The grain was left on 102. Also, in rice mills, etc., for example, there are two series of lines, a line for glutinous rice and a line for lanterns, and a stone removing and sorting machine dedicated to urushi and a stone removing and sorting machine dedicated to glutinous rice are provided to discharge the entire amount. It was designed so that it would not need to be cleaned.

[Problems to be solved by the invention]

Other examples of sorting boards for stone removing sorters include those disclosed in Japanese Examined Patent Publication No. 54-36103 and those disclosed in Japanese Examined Publication No. 55-55176. (See FIG. 9), a narrow stone outlet 107 is provided in the central portion of one side wall 106 of the perforated plate 105 having a rectangular shape in plan view.
The eye 108 near is formed so as to open in the direction of the stone outlet 107 so as to blow out the wind. On the other hand, in Japanese Utility Model Publication No. 55-55176, as shown in FIG.
Inside the vicinity of the partition wall 110 on the high side of 9 is a porous plate 113 having a step and a low height and formed with a ventilation port 112 for blowing wind toward the outlet 111, and at the end of the porous plate 113. Is stone outlet 11
4 is formed, and this stone discharge port 114 is formed by providing a ventilation port 115 for blowing wind in the stone dust discharge direction.

However, even in the sorting perforated plate 105 or the sorting disc 109, it is troublesome at the end of the sorting work, and particularly when the grains on the sorting perforated plate 105 or the sorting disc 109 become sparse, the wind from the windmill escapes. The velocity of the air blown from the eyes 108, the ventilation holes 112, and the ventilation holes 115 is significantly reduced, and the grains and stones present on the respective portions of the eyes 108, the ventilation holes 112, and 115 are not transported any more. It remains in the aircraft, and it is not possible to discharge all of it.

The present invention was developed in view of the above, and it is a technical object to provide a stone removing and sorting machine that can completely discharge the grains in the machine at the end of the sorting work.

[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 and tilts. In a stone sorter in which the upper and lower ends are opened and the inclined lower end serves as the refined product outlet, a. Connected to the inclined upper end of the sorting board, a lateral feeding trough is provided at a position lower than the surface of the sorting board and in a direction substantially orthogonal to the tilting direction.

B. A large number of protrusions are formed on the conveying surface of the horizontal gutter, and the projections are provided with air blow holes that communicate with the fan case and face one end of the horizontal gutter toward the discharge port.

C. On one side of the sorting board, there is provided an elongated secondary sorting board which has almost the same inclination as that of the sorting board and which is connected to the discharge port of the lateral trough.

D. The secondary sorting board is provided with a catching part for pushing up the stone to the stone removal port at the upper end of the slope and a large number of blowholes for blowing down the refined product at the refinement product return port at the lower end of the slope, and blows air to this blowhole. An air storage case is provided integrally with the secondary sorting board.

E. The air storage case communicates with the fan case via a communication path.

F. Further, on the upper part of the fan case, two straightening vanes having a large number of ventilation holes are stretched between the communication passage and the sorting board.

G. One of the straightening vanes is movably provided so that the ventilation holes of the straightening vanes are displaced to block the air flow to the sorting board.

I took the technical means.

[Work]

At the end of the sorting work, one of the straightening vanes stretched in the fan case is moved to shift the overlapping ventilation holes to block the air flow to the sorting board. Since the blast is stopped from the blast holes of the sorting board, the grains on the sorting board do not flow down while floating, but are swung up by the protrusions and the whole amount falls into the traverse trough. The grains in the horizontal gutter are transported to the secondary sorting board by the wind from the blowholes on the transport surface.
Since the air flow to the sorting board is blocked, the air flow rate to the horizontal gutter increases, and a large amount of grain can be easily transported.
On the other hand, the amount of air flowing into the air storage chamber from the communication passage also increases, and the velocity of the air blown from the air blow holes of the secondary sorting board also increases, allowing the grains on the secondary sorting board to be smoothly blown down to the refined product return port. , Only the stone is pushed up by the catching part and discharged from the stone removing port.

Example of Invention

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

FIG. 1 is a side sectional view of an embodiment of the present invention, in which 1 is the entire stone removing sorter, and 2 is a box forming machine that forms the outer shape of the stone removing sorter 1. A supply hopper 3 is provided substantially at the center of the upper surface wall 2a of the two. 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 projected outside the box machine frame 2.

A fan case 7 is swingably provided in the box-shaped machine frame 2. That is, the support shafts 8 are attached to the two locations on the wall surface of the fan case 7,
9 is welded, both ends of the support shaft 8 are supported by bearings 10 and 10, and the bearings 10 and 10 are fixed to one ends of the swing arms 11 and 11, respectively, and the other ends of the swing arms 11 and 11 are support shafts. Bearings fixed to 12 and both ends of the support shaft 12 fixed to both side walls of the box-shaped machine frame 2.
It is pivotally supported on 13,13. Similarly, both ends of the support shaft 9 have bearings 14 and 14
The bearings 14, 14 are supported by the swing arm 15,
Each of the swing arms 15, 15 is fixed to one end of the box 15, the other end of the swing arm 15 is fixed to the support shaft 16, and both ends of the support shaft 16 are supported by bearings 17, 17 fixed to both side walls of the box-shaped machine frame 2. It

A vibrating mechanism for imparting a vibrating action to the fan case 7 which is swingably supported in the box-shaped machine frame 2 in this manner will be described. The crankshaft 19 that receives rotational force by the crankshaft pulley 18 is rotatably supported by one side wall of the box-shaped machine frame 2 and the support plate 20, and the eccentric portion of the crankshaft 19 and the mounting plate 21 of the fan case 7 are separated from each other. The crankcases 22 are connected to each other, whereby the fan case vibrates up and down obliquely about the support shafts 12 and 16.

The upper part of the fan case 7 is opened to send air to the bottom surface of a sorting board 23 (described later), and an air intake port 24 is opened in the center of both side walls. The fan shaft 25 penetrates through the air intake port 24 and is rotatably supported by both side walls of the box-shaped machine frame 2. The fan 62 is attached to the fan shaft 25.
A fan pulley 26 is fixed to one end of the fan pulley 26, and the fan pulley 26 and the crankshaft pulley 18 are rotated by an electric motor 27. That is, the V belt 29 is stretched around the motor pulley 28, the crankshaft pulley 18, and the fan pulley 26 of the electric motor 27.

Next, the relationship of 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 on the surface of the sorting board 23 (see FIG. 4), a large number of slit holes 30 ... A protruding portion 31 formed continuously on the side is provided. The protrusion 31 is pressed from the back surface of the sorting board 23 to be molded, and at this time, a crevice 32 is formed in the protrusion 31. Therefore, the air blown from the slits 30 will be cracked 32.
Due to the wind that blows out from it, it is slightly inclined upward rather than upward. Side walls 33, 33 are erected on both sides of the slope of the sorting board 23, the upper end of the slope and the lower end thereof are opened, and the upper end is a communication port.
At 34, the lower end is a refined product outlet 35. A horizontal trough 36 having a transport surface 37 lower than the board surface of the sorting board 23 is attached to the connecting port 34 integrally with the sorting board 23.

One end of the lateral gutter 36 is opened to form a lateral gutter discharge port 38, and a non-perforated inclined communication gutter 39 is provided to be connected to the lateral gutter discharge port 38. In addition, the transport surface 37 of the lateral gutter 36 is provided with a large number of projections 41 having fissures 40 that blow toward the lateral gutter outlet 38 (fifth portion).
See figure).

The lower end of the inclined connection gutter 39 is connected to a secondary selection disc 42 which is provided in parallel with the selection disc 23 and in a substantially equal inclination. Side walls 43, 43 are provided on both sides of the slope of the secondary sorting board 42, and the upper end and the lower end of the slope are opened, and the upper end is a stone removing port 44 and the lower end is a refined product returning port 45. The board surface of the secondary sorting board 42 (see FIG. 6) is provided with a large number of air blow holes 46 directed to the lower side of the slope and a catching portion 47 for rocking the stone pieces to the upper side of the slope. . That is, the tip end of the blowhole 46 is formed in the catch portion 47 by slightly raising it toward the upper side of the inclination of the secondary sorting board 42. An air storage case 48 is airtightly attached to the back surface of the secondary sorting board 42 below the secondary sorting board 42. An upper surface of the air storage case 48 is opened to blow air toward the back surface of the secondary sorting board 42, and a window 49 is opened on the wall surface of the air storage case 48 on the fan case 7 side. On the other hand, on the wall surface of the fan case 7 on the side of the air storage case 48, a window 50 opposite to the window 49 is also established, and the window 49 and the window 50 have a communication passage 51.
Communicated by. The secondary passage 42 and the air storage case 48 are connected to the fan case 7 by the communication passage 51 and the inclined connection gutter 39.
Is integrally fixed to the fan case 7 and vibrates together with the fan case 7.

A fixed rectifying plate 52 is provided on the upper part of the fan case 7 between the sorting board 23 and the window 50, and the fixed rectifying plate 52 is provided with a large number of ventilation holes 53 at regular intervals. There is. A movable rectifying plate 54 is movably mounted on the fixed rectifying plate 52 in contact with the upper surface of the fixed rectifying plate 52. Movable flow plate 54
Is formed so that the moving direction side is shorter than the fixed rectifying plate 52, and the plate surface is provided with ventilation holes 55 of the same shape and shape as the ventilation holes 53 of the fixed rectifying plate 52. The rectification room 56 is formed between them. The moving direction of the movable flow plate 54 in this embodiment is orthogonal to the inclination direction of the sorting board 23, and the solenoid 57 fixed to the side wall 43 of the secondary sorting board 42 makes the 1/2 pitch p of the ventilation holes 53, 55 p. It shall be moved by the minute (see Fig. 3). The solenoid 57 is operated by a level switch 58 provided at the bottom of the supply hopper 3 so that the solenoid 57 operates by a level switch via a timer (not shown).
I'm in electrical contact with 58.

Reference numeral 59 is a product discharge gutter that guides the product discharged from the product outlet 35 of the sorting board 23 to the outside of the machine. The product discharge gutter 59 is the fan case 7
An opening provided on one side wall of the box-shaped machine frame 2 while being fixed to the
It is exposed to the plane from 60. On the other hand, on the other side,
A stone discharging gutter 61 for receiving stones falling from the stone removing port 44 of the secondary sorting board 42 is fixedly provided to the box-shaped machine frame 2. An inspection door 63 is provided above the stone discharge gutter 61 so that a part of the box-shaped machine frame 2 can be opened and closed.

Next, the operation of this embodiment will be described.

Rice grains discharged from a rice polishing machine (not shown) are put into the supply hopper 3 by a chute pipe, the electric motor 27 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 from the fan 62 allows ventilation of the fixed rectifying plate 52 and the movable rectifying plate 54.
While being rectified through 53, 55, it is blown from the rectification chamber 56 through the slits 30 and the crevices 32 onto the sorting board 23 (fourth
(See the figure), the rice grains falling from the supply hopper 3 slightly float up by the blast, and about 80% of the rice grains flow down to the refined product outlet 35 side while being pushed by the rice grains that will be dropped later, and then from the refined product outlet port 35. It flows into the refined product discharge gutter 59 and is discharged to the outside of the machine.

On the other hand, since the stone contained in the raw brown rice has a large specific gravity, it does not float from the sorting board 23, is pushed up by the protrusion 31 toward the side of the communication port 34, and finally falls from the communication port 34 into the lateral feeding trough 36. At this time, approximately 20% of the rice grains that fall from the supply hopper 3 flow into the lateral trough 36 together with the stone. The horizontal trough 36 is provided with a large number of protrusions 41, and the protrusions
The stones and the rice grains slide down the inclined connection gutter 39 from the lateral gutter discharge port 38 onto the secondary sorting board 42 by the jet wind directed from the 41 to the lateral gutter discharge port 38 side. In addition, in the vicinity of the communication port 34 at the upper end of the inclined side of the sorting board 23, there may be a case where a restricting means for restricting the fed rice grains is provided.

The air is blown from the air storage case 48 to the secondary sorting board 42, that is, the wind that flows from the inside of the fan case 7 into the air storage case 48 through the communication passage 51 toward the inclined downward side from the blow hole 46. The rice grains conveyed along with the stones are conveyed to the refined product return port 45 side by this wind, fall into the refined product discharge gutter 59 from the refined product return port 45, and are discharged out of the machine. Since the stone has a large specific gravity, it is not affected by the blast and the catching part
It is pushed up to the side of the stone exit 44 by 47, and the stone exit 44
It falls into the stone discharge gutter 61 and is taken out of the machine. As described above, since the secondary sorting board 42 for finally separating the stones and the rice grains is provided with the blowholes 46 directed to the lower side of the slope, rice bran and small foreign matters which can be fitted into the blowholes 46 are blown out. It is blown off to the lower side of the slope by the wind and prevents clogging and bran adhesion, and does not lower the sorting accuracy. In some cases, the inclination angle of the secondary sorting board 42 may be changed.

The above is so-called steady operation, and the operation at the end of operation will be described below.

When the raw rice grains in the supply hopper 3 gradually decrease and the level switch 58 is turned on, for example, a timer operates for 10 seconds, and the solenoid 57 is excited by the time-up signal of this timer to move the movable rectifying plate 54. As a result, the ventilation port 53 and the ventilation port 55 do not overlap with each other, and the rectification chamber 56
The air flowing toward the sorting board 23 via the air is cut off, and the cut air flows toward the transport surface 37 of the lateral gutter 36 and the window 50.

Therefore, no blast is generated from the slits 30 and the crevices 32 of the sorting board 23, and the raw rice grains on the sorting board 23 are conveyed to the upper side of the slope by the protrusions 31 without floating, and the whole amount is connected to the communication port 34. Falls into the horizontal trough 36. At this time, since a large amount of air is being sent to the transfer surface 37 of the lateral transfer trough 36, the wind speed from the fissure 40 is high, and the transfer capacity is increased. The horizontal transfer gutter 36 having an increased carrying capacity is sufficient to carry a large amount of rice grains falling from the communication port 34, and carries all the rice grains to the secondary sorting board 42.

A large amount of air is also sent into the air storage case 48 as in the lateral transfer trough 36, and the wind speed of the air blown from the air blow holes 46 of the secondary sorting board 42 also increases. Therefore, it is enough to blow down a large amount of rice grains conveyed from the horizontal gutter 36 to the lower side of the slope, and the mixed stones are pushed up by the catch portion 47 to the upper side of the slope and the stone discharging gutter 61 from the stone removing port 44. Is discharged to the outside of the machine.
In this way, all rice grains and stones are discharged.

FIG. 7 is a plan view showing another embodiment of the present invention. In this embodiment, the secondary sorters 42A are sandwiched between the sorters 23A and 23B, and fan cases (not shown) are provided below the sorters 23A and 23B. An air storage case (not shown) is provided below the secondary sorting board 42A in an airtight manner, and the communication passages 51A, 51
B communicates with fan cases provided below the sorting boards 23A and 23B, respectively. Further, a fixed rectifying plate and a movable rectifying plate are provided below the sorting boards 23A and 23B, respectively, and the movable rectifying plate is formed so as to be moved by solenoids 57A and 57B. The rest of the configuration is the same as that of the previous embodiment, and will be omitted.

The operation of this embodiment is almost the same as that of the previous embodiment, and the raw rice grains supplied from the openings 4A, 4B of the supply hoppers (not shown) are subjected to the selection operation by the respective selection disks 23A, 23B. , Rice grains fall from the refined product outlets 35A, 35B,
Discharge from the refined product discharge gutter 59A to the outside of the machine. Stone is a transport gutter 36A, 36B
Is transported to the secondary sorting board 42A for re-sorting, the stones are discharged from the stone removing port 44A into the stone discharging trough 61A, and the rice grains are returned to the refined product returning port 45.
The product drops from A into the spout 59A.

When the solenoids 57A and 57B are operated by an arbitrary switch at the end of the work, the movable rectifying plates move to block the air flow to the sorting boards 23A and 23B and to move the horizontal gutter 3
The amount of air blown to 6A, 36B and secondary sorting board 42A is increased, and sorting board 2
All the rice grains on 3A and 23B are conveyed to the secondary sorting board 42A by the horizontal transfer troughs 36A and 36B, and the rice grains are discharged from the refined product return port 45A and the stones from the stone removing port 44A, respectively.

An opening / closing valve for stopping the stone and an appropriate sensor are provided at the stone removing port 44, and the sensor and the opening / closing valve actuating device open the opening / closing valve when the sensor detects that the stone has accumulated to some extent. In some cases, a so-called automatic stone discharging device that is electrically connected to (a solenoid or the like) is provided. In this case, only stones can be concentrated and taken out, and the sorting accuracy becomes almost perfect.

〔The invention's effect〕

According to the present invention, as described above, the horizontal feeding gutter is provided on the inclined upper end of the sorting board, the secondary sorting board is provided on the side to form the flow path, and the lateral feeding gutter and the secondary sorting board are provided. The blower hole and the fan case are communicated with each other, and further, two rectifying plates having vent holes are stretched below the sorting board, and one of the rectifying plates is moved to close the ventilation port, thereby selecting the sorting board. Since it is formed so as to block the air flow to the sorting board, when the feedstock is exhausted, the straightening vanes are moved to block the air flow to the sorting board, and the grains on the sorting board are the protrusions of the sorting board without a blast. Then, the whole amount is shaken up in the horizontal transfer gutter and conveyed to the secondary sorting board. At this time, since there is no blast on the sorting board, the grains do not scatter. Moreover, since the air flow to the sorting board is shut off and the tank air volume to the lateral gutter and the secondary sorting board is increased at the same time, a large amount of grains can be easily transported and sorted, and there is no residue.

Therefore, when the stone removing / sorting machine according to the present invention is incorporated in a line of a rice mill or the like, cleaning after the operation is unnecessary,
If all the other devices can discharge the whole amount, different types of grains can be processed in sequence on one line, and the rice mill can be designed more compactly than before and it is economical.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIGS. 2 and 3 are perspective views of essential parts, and FIGS. 4 to 6 are partially enlarged sectional views for explaining the operation, and FIG. Is a plan view of an essential part of another embodiment, and FIG.
FIG. 9 is a perspective view showing a conventional technique, FIG. 9 is a plan view showing another conventional example, and FIG. 10 is a plan view showing yet another conventional example. 1 ... Stone removing sorter, 2 ... Box machine frame, 3 ... Supply hopper, 4 ... Opening, 5 ... Shutter plate, 6 ... Actuating rod,
7 ... Fan case, 8,9 ... Spindle, 10 ... Bearing, 11 ...
… Swinging arm, 12 …… Spindle, 13,14 …… Bearing, 15 …… Swinging arm, 16 …… Spindle, 17 …… Bearing, 18 …… Crankshaft pulley, 19 …… Crankshaft, 20 ...... Support plate, 21
...... Mounting plate, 22 …… Crank arm, 23 …… Sorting board, 24 …… Air intake, 25 …… Fan shaft, 26 …… Fan pulley, 27 …… Electric motor, 28 …… Motor pulley,
29 …… V-belt, 30 …… Slit hole, 31 …… Protrusion, 32 ……
Rift, 33 ... Side wall, 34 ... Contact opening, 35 ... Refined product outlet,
36 …… Side-feed gutter, 37 …… Transport surface, 38 …… Side-feed gutter outlet, 39
…… Inclined contact gutter, 40 …… Rip, 41 …… Projection, 42 …… Secondary sorting board, 43 …… Side wall, 44 …… Ishitori outlet, 45 …… Refined product outlet, 46 …… Just Hole, 47 ... catching part, 48 ... air storage case, 49, 50 ... window, 51 ... connecting path, 52 ... fixed rectifying plate, 53 ... ventilation port, 54 ... movable rectifying plate, 55 ...... Ventilation port,
56 …… Rectification chamber, 57 …… Solenoid, 58 …… Level switch, 59 …… Refinement discharge gutter, 60 …… Opening part, 61 …… Stone discharge gutter, 62 …… Fan.

Claims (2)

[Claims] 1. A sorting board, which has a large number of projections and air blow holes, 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 a stone removing sorter with the inclined lower end as a refined product outlet,
Connected to the inclined upper end of the sorting board, a horizontal feeding gutter is provided at a position lower than the surface of the sorting board and in a direction substantially orthogonal to the inclination direction, and a large number of protrusions are formed on the conveying surface of the horizontal feeding gutter. In addition, a jet hole, which is connected to the fan case and faces the discharge port that opens at one end of the horizontal gutter, is formed on this protrusion, and one side of the sorting board has the same inclination as this sorting board and An elongated secondary sorting board that connects to the discharge port of the horizontal gutter is provided.
The secondary sorting board is provided with a catching part for pushing up the stone to the stone removal port at the upper end of the slope and a large number of blowholes for blowing down the refined product at the refinement product return port at the lower end of the slope, and blows air to this blowhole. An air storage case is provided integrally with the secondary sorting board, the air storage case communicates with the fan case through a communication passage, and a large number of ventilations are provided on the upper part of the fan case between the communication passage and the sorting board. Two straightening vanes with holes are stretched, and one straightening vane is provided so as to be movable so that the ventilation holes of each straightening vane are displaced to block the air flow to the sorting board. Sorting machine. 2. The stone removing / sorting machine according to claim 1, wherein one of the straightening vanes is movably provided by a solenoid.