JP2016010790A - Stone sorting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stone sorting machine which can reduce residence time of foreign matter on a porous sorting member and can perform going up of the foreign matter smoothly.SOLUTION: Between a feeding hopper 35 and a porous sorting plate 18, a mitigation member 180 receiving kernel charged from the feeding hopper 35 is arranged. The mitigation member 180 reduces drop rate of the received kernel and makes the kernel arrive at the porous sorting plate 18. The kernel charged from the feeding hopper 35 drops and is received by the mitigation member 180, and is supplied to the porous sorting plate 18. Because the kernel is received by the mitigation member 180, the drop rate of the kernel dropped from the feeding hopper 35 is mitigated and the kernel is supplied to the porous sorting plate 18.

Description

  The present invention relates to a stone extraction sorter.

The stone extraction sorter is a machine that swings an inclined sorting net and separates foreign matters such as grains and stones by the difference in specific gravity (see Patent Documents 1 to 5 and FIG. 13).
Grain supplied on the sorting net 100 shown in FIG. 13 is lifted from the sorting net 100 by the swinging action of the vibration mechanism 110 and the wind force blown from the fan 120 below the sorting net 100, and as shown in FIG. Foreign matter S such as stone is separated into an upper layer (grain layer Ta) and a lower layer. And the grain T flows below the sorting net | network 100, and is discharged | emitted outside the apparatus.

  On the other hand, the foreign matter S mixed in the grain T has a specific gravity larger than that of the grain, so that it is located below the grain layer Ta and forms a stepped undulation 102 on the surface of the sorting net 100 between the sorting net 100 and the grain layer Ta. Go up along. Then, the foreign matter S moves to and accumulates above the sorting net 100 and is discharged outside the machine through a stone discharge port (not shown) provided in the case 130 of the sorting net 100 at every predetermined time. The foreign matter S accumulates at a position above the sorting net 100. At this time, not only stones but also normal grains are mixed, and at the same time, the grains collected above the sorting net are also discharged from the stone outlet. Discharged.

JP 2000-107697 A Japanese Patent Laid-Open No. 11-300280 JP-A-11-333380 Japanese Utility Model Publication No. 57-161475 JP 2003-260417 A

  By the way, as shown in FIG. 12, in general, in the stone extraction sorter, the grain T is concentrated from a hopper 140 shown in FIG. 13 to a specific part on the sorting net 100, that is, a part facing the discharge port of the hopper 140. Supplied. In this way, when the grain T is intensively supplied to a specific part on the sorting net 100, the specific part is prevented from moving up foreign matter S such as stones located below the specific part. . The foreign matter S that has been prevented from going up wraps around from other parts so as to avoid the specific part and goes up. For this reason, the foreign matter S that has been prevented from going up will wrap around so as to avoid a specific part, so that the residence time of the foreign matter S in the sorting network 100 becomes long and the stone cannot be discharged smoothly. is there.

  An object of the present invention is to provide a stone extraction and sorting machine that can reduce the residence time of foreign matters on a porous sorting member and can smoothly carry up foreign matters.

  In order to solve the above problems, the stone extraction and sorting machine of the present invention is a sorting case having a porous sorting member at the bottom, which is arranged in an inclined state and to which vibration is applied, and the sorting. An input unit for supplying the grain into the case; and a blowing unit for blowing air from below the sorting case, and the wind from the blowing unit for transferring the grain in the sorting case and the foreign matter mixed in the grain. In the stone extraction sorter that sends out the specific gravity-sorted foreign matter obliquely above the sorting case and sends the specific gravity-sorted grain diagonally downward, between the input part and the porous sorting member Is provided with a speed relaxation unit that receives the grain that has been input from the input unit, and the speed relaxation unit reduces the falling speed of the received grain and then uses the grain as the porous sorting member. To reach.

Moreover, it is preferable that the said speed relaxation part is provided over the whole width | variety of the said selection case.
The speed relaxation unit includes a first surface that receives the grain from the input unit, and a second surface that is integrally connected to the first surface and positioned below the first surface, It is preferable that the first surface is arranged in an inclined state like the porous sorting member, and the second surface is connected so as to form an obtuse angle with the first surface.

  In addition, a passage through which the foreign matter mixed in the grain rises is formed between the speed relaxation portion and the porous sorting member, and a preventing means for preventing the foreign matter from staying at the entrance of the passage. It is preferable to be provided.

  The sorting case includes a pair of side walls arranged in the width direction and formed in a straight line, and end walls connecting the end portions of the pair of side walls, and the speed reducing portion on the end walls. And a guide portion having a V-shaped guide surface extending on the porous sorting member is provided as the prevention means, and the passage between the guide surface and the side wall located proximally. Is preferably formed.

  Moreover, it is preferable that the speed relaxation part is provided with a wind outlet that allows introduction of wind from below the porous sorting member in the passage.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect which can reduce the residence time of the foreign material on the porous selection member, and can perform the foreign material going up smoothly.

The schematic sectional drawing of the stone extraction sorter of one embodiment. The perspective view which similarly shows the structure of a selection case. The top view which similarly shows the structure of a selection case. Sectional drawing which similarly shows the structure of a selection case. Explanatory drawing of the state into which the grain is thrown in from the hopper in the case where there exists a relaxation member. Explanatory drawing of the state in which the grain is thrown in from the hopper when there is no relaxation member. Explanatory drawing of an effect | action of a guide surface. Explanatory drawing which shows the residence place of the conventional grain when there is no guide part. Explanatory drawing which shows the passage state of the wind in a channel | path. Explanatory drawing which shows the passage state of the wind in a channel | path. Explanatory drawing of the state which the grain and the foreign material isolate | separated. Conventionally, the explanatory view of the state where the grain thrown in from the hopper is blocking the eve going up. Schematic sectional view of a conventional stone extraction sorter.

Hereinafter, a stone extraction and sorting machine according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the machine casing 11 of the stone extraction sorter is formed in a substantially box shape, and an opening 11 a is formed on the front surface (left side in FIG. 1), and the bottom wall of the machine casing 11 is formed. A pair of support members (not shown) are erected at a predetermined interval. In the stone extraction sorter shown in FIG. 1, the left side is referred to as the front and the right side is referred to as the rear.

  As shown in FIG. 1, between the pair of support members, a rotary shaft 13 and a support shaft 14 are installed and supported so as to be rotatable at a predetermined distance in the front and rear directions at different height positions. A pair of first support rollers 15 (only one is shown) is rotatably supported on the rotation shaft 13 at a predetermined interval, and the support shaft 14 has a support shaft 14 corresponding to each first support roller 15. A pair of second support rollers 16 (only one shown) is rotatably supported at a predetermined interval.

  As shown in FIGS. 1 and 2, the sorting case 17 has a pair of side walls 170, 172, an end wall 174 located on the rear end side, and an end wall 176 located on the front end side. Is formed in an open box shape. The side walls 170 and 172 are formed in a straight line.

  At the bottom of the sorting case 17, a porous sorting plate 18 as a porous sorting member is disposed. A large number of holes 18 a are formed in the entire porous sorting plate 18. 5, 6, and 9, for convenience of explanation, the holes 18 a are shown as simple through holes, but actually, as shown in FIG. 11, a plurality of holes 18 a are arranged in a stepwise manner in the front-rear direction. It should be understood that it is formed having In FIG. 3, the hole 18 a is shown only in a region along the side walls 170, 172 and a region along the front end, near the front end (right end in FIG. 3) of the porous sorting plate 18 and the center of the porous sorting plate 18. The hole 18a in the portion is omitted for convenience of explanation.

  As shown in FIG. 4, a flat plate 182 arranged in a slanting manner in front of the porous sorting plate 18 is connected to the front end of the porous sorting plate 18 so that the upper surface is flush with the front end. In this embodiment, the hole 18a provided in the flat plate 182 is not provided, but the hole 18a may be provided.

A pair of first inclined support surfaces 19 and a pair of second inclined support surfaces 20 are formed on the lower surfaces of the side walls 170 and 172 of the sorting case 17 at a predetermined interval in the front-rear direction.
As shown in FIG. 1, in the sorting case 17, the first inclined support surfaces 19 and the second inclined support surfaces 20 are detachably contacted with the first support roller 15 and the second support roller 16, respectively. It is supported by. As a result, the sorting case 17 is disposed in the machine casing 11 so as to be swingable and detachable in a state of being inclined forward and downward.

A sorting portion 17 a is formed on the perforated sorting plate 18 in the center of the sorting case 17, and a grain outlet 17 b is formed below the end wall 176 of the sorting case 17.
As shown in FIGS. 1 to 4, in the sorting case 17, a relaxation member 180 as a speed relaxation portion is provided on the side walls 170 and 172 on the front end side. In this embodiment, the relaxation member 180 includes a flat plate portion 183 and a bent portion 184 that is bent obliquely so as to form an obtuse angle at the front end of the flat plate portion 183. The upper surface of the flat plate portion 183 is the first surface 180a, and the upper surface of the bent portion 184 corresponds to the second surface. The flat plate portion 183 of the relaxing member 180 is disposed in parallel with the perforated sorting plate 18 in a state of being inclined forward and downward.

  The relaxation member 180 has both ends in the width direction attached and fixed to the inner surfaces of the side walls 170 and 172. A method of attaching the relaxation member 180 to the side walls 170 and 172 is performed by screwing, welding, an adhesive, or the like, but is not limited thereto.

  As shown in FIG. 2, a guide portion 190 is provided between the relaxation member 180 and the porous sorting plate 18. The guide part 190 is formed of a pentagonal frame. That is, the frame body is integrally connected to a pair of guide walls 192 and 194 fixed to the end wall 174, and the front ends of the guide walls 192 and 194, and one end is integrally connected to each other to form a V shape. And a pair of guide walls 196, 198. The guide walls 192 and 194 have guide surfaces 192 a and 194 a parallel to the inner surfaces of the side walls 170 and 172. Further, as shown in FIG. 2, the guide walls 196 and 198 are arranged obliquely with respect to the inner surfaces of the side walls 170 and 172 so that the separation distance decreases from the front end toward the rear end. . The entire guide portion 190 is covered with the relaxation member 180.

  Between the relaxing member 180 and the perforated sorting plate 18, the passages 47 and 48 through which foreign substances S such as stone mixed in the grain pass are between the guide wall 196 and the side wall 170 and between the guide wall 198 and the side wall 172. It has become.

  When the foreign matter S is located below (ie, in front of) the guide portion 190 and in the vicinity of the front end of the guide portion 190, the foreign matter is guided by the guide surfaces 196a and 198a arranged in a V shape. S is guided to enter one of the passages 47 and 48. That is, the foreign matter S that moves up is guided by one of the guide surfaces 196a and 198a and enters one of the passages 47 and 48, so that the foreign matter S is stored in front of the V-shaped portion. There has been no such thing.

  The guide portion 190 having the V-shaped surface is an example of a prevention unit provided at the entrance of the passage. Further, a pebble collecting portion 17c is formed at the rear portion of the passages 47 and 48, and the rear end of the pebble collecting portion 17c is closed by the end wall 174. Further, a rear end outlet portion 17d is formed at the bottom of the pebble collecting portion 17c.

  As shown in FIGS. 1 and 5, a gate 29 for opening and closing the front end inlet portion and the rear end outlet portion 17d of the pebble collecting portion 17c is disposed so as to be rotatable with respect to the end wall 174. . The gate 29 is connected to the operation bar 29a and can be opened and closed by the operation bar 29a.

  During the grain sorting operation, the gate 29 is pivoted to the position indicated by the solid line in FIG. 5, the front end entrance of the pebbles collection unit 17c is opened, and the sorting unit 17a and the pebbles collection unit 17c are connected. While being communicated, the rear end outlet portion 17d of the pebble collecting portion 17c is closed. In this state, the pebbles sorted in the sorting unit 17a can be collected in the pebbles collecting unit 17c by swinging the sorting case 17 and blowing air from the blower 26. The blower 26 is an example of a blower unit.

  As shown in FIGS. 2 and 9, in the relaxing member 180, a ventilation port 185 as a wind exhaust port is provided above each gate 29. Then, the wind from the hole 18 a enters the passages 47 and 48 and is exhausted from the ventilation port 185.

  Further, after the supply of the grain from the supply hopper 35 is stopped, when the gate 29 is pivotally arranged at the position indicated by the chain line in FIG. 5, the front end inlet portion of the pebble collecting unit 17c is closed, and the sorting unit 17a. And the pebbles collection part 17c are shut off. At the same time, the rear end outlet portion 17d of the pebble collecting portion 17c is opened. In this state, due to the swinging of the sorting case 17 and the blowing from the blower 26, the foreign matter S accumulated on the pebble collecting part 17c is provided on the machine frame 11 via the rear end outlet part 17d. It can be discharged via

As shown in FIG. 1, a drive mechanism 21 is provided between the machine casing 11 and the sorting case 17 for reciprocating the sorting case 17 along the inclination direction.
That is, an eccentric ring 22 is attached to the rotary shaft 13 between the pair of first support rollers 15, and a contact plate 23 is provided on the lower surface of the sorting case 17 so as to be able to contact the eccentric ring 22. It protrudes in an inclined shape. A compression spring 24 is attached to the machine frame 11 via a mounting plate 25, and the front end of the compression spring 24 is joined to the end wall 174 of the sorting case 17. As a result, the sorting case 17 is urged forward along the inclination direction, and the contact plate 23 is pressed against the eccentric ring 22.

  When the eccentric wheel 22 is rotated and a rearward movement force is applied to the sorting case 17 along the inclination direction, the first inclined support surface 19 and the second inclined support surface 20 are the first and second. The sorting case 17 is slid in contact with the support rollers 15 and 16 and is swung upward at the rear. Further, when the eccentric ring 22 is rotated to move forward along the tilt direction with respect to the sorting case 17 in the opposite direction, the biasing force of the compression spring 24 causes the tilting direction with respect to the sorting case 17. A forward moving force is applied along Accordingly, the first inclined support surface 19 and the second inclined support surface 20 are in sliding contact with the first support roller 15 and the second support roller 16, respectively, and the sorting case 17 is swung downward in the front part.

  As shown in FIG. 1, a blower 26 is disposed below the bottom of the sorting case 17. The blower 26 includes a fan case 27 that is fixedly disposed between the support members (not shown), and a fan 28 that is rotatably supported in the fan case 27 between the support members. In correspondence with the fan 28, the support member is formed with an intake hole (not shown).

  A motor 30 is disposed in the machine casing 11, and a drive pulley 31 is attached to the motor shaft 30a. A driven pulley 32 is attached to the end of the shaft of the fan 28, and a driven pulley 33 is attached to the end of the rotating shaft 13, and between these driven pulleys 32, 33 and the drive pulley 31. The belt 34 is hung. The fan 30 and the rotary shaft 13 are rotated by the motor 30, and wind is sent from the fan case 27 into the sorting case 17 through the hole 18 a of the perforated sorting plate 18, and the sorting case 17 is tilted by the eccentric ring 22. Is swung back and forth.

  In the upper part of the machine casing 11, above the sorting case 17, a supply hopper 35 for accommodating the grain is disposed at a position facing the flat plate portion 183 of the relaxation member 180 of the sorting case 17. A supply port 36 having a rectangular shape elongated in the width direction is formed at the bottom. Further, as shown in FIG. 3, the length in the width direction of the supply port 36 is the same as the entire length in the width direction of the flat plate portion 183. The supply hopper 35 is an example of a charging unit.

  And the supply port 36 formed in the rectangle has the same opening length of the front-back direction over the whole width direction. Therefore, the thickness in the front-rear direction of the layer formed by the grain K or the like immediately after exiting from the supply port 36 is set to be the same in the width direction.

  Further, by making the width in the width direction of the supply port 36 the same as the entire length in the width direction of the flat plate portion 183 of the relaxation member 180, the grains put in from the supply hopper 35 hit the entire width direction of the flat plate portion 183. Has been. In the present embodiment, the position of the supply port 36 is a region P in which the grain K falling from the supply port 36 and the foreign matter S mixed in the grain K are hatched on the first surface 180a shown in FIG. Is set to aim. This region P is a portion of the flat plate portion 183 that is separated from the bent portion 184 to the rear side.

(Operation of the embodiment)
Next, the operation of the stone extraction sorter configured as described above will be described.
When the motor 30 is started by operating a start switch (not shown), the first support roller 15 and the eccentric wheel 22 on the rotary shaft 13 are rotated and the fan 28 of the blower 26 is rotated. As the eccentric wheel 22 rotates, the sorting case 17 is swung back and forth, and wind is sent from the blower 26 into the sorting case 17.

  When the grain is accommodated in the supply hopper 35 in this state, the grain K in the supply hopper 35 and the foreign matter S such as pebbles mixed in the grain K extend over the entire width direction of the flat plate portion 183. It is supplied into the sorting case 17 so as to hit.

  And the grain K and the foreign material S which fell from the supply port 36 of the supply hopper 35 are the area | region P shown by hatching in the 1st surface 180a of the relaxation member 180, as shown to the arrow A of FIG. 4, and FIG. Fall into.

The grains K and the like falling from the supply hopper 35 are supplied so as to be uniformly layered and hit over the entire width direction of the flat plate portion 183.
And after the grain K and the foreign material S fall to the area | region P, it slips forward the 1st surface 180a over the whole width direction of the flat plate part 183, and it shows by the arrow B of FIG. Thus, it is slightly lifted up and falls onto the porous sorting plate 18. The grains K and the like are dispersed by being flipped up by the bent portion 184.

  The grains K and the like dispersed as described above are located in front of the front edge of the relaxation member 180 (the front edge of the bent portion 184) and are located in the region P1 located over the entire width of the porous sorting plate 18. Fall. In FIG. 3, the part P1 is hatched.

  Thus, the grain K or the like dropped from the supply hopper 35 once hits the relaxing member 180, and the dropping speed thereof is reduced for the reasons described later, and then falls lightly on the porous sorting plate 18 from the relaxing member 180. .

  In addition, the grains K and the like that have fallen on the porous sorting plate 18 are subjected to specific gravity sorting in the sorting unit 17 a on the porous sorting plate 18 by the swinging of the sorting case 17 and the blowing from the blower 26. Then, the grain moves forward from the sorting unit 17a in a state of floating from the porous sorting plate 18, and is taken out from the grain outlet 17b.

  In addition, when the grain K etc. falls on the porous sorting plate 18 from the relaxation member 180 (folding part 184) with respect to the site | part P1, and the case where it falls directly on the porous sorting plate 18 from the supply hopper 35 The drop from the relaxation member 180 has a smaller drop. For this reason, the final drop speed when falling from the relaxation member 180 to the part P1 is reduced than the final drop speed when dropping directly from the supply hopper 35 onto the porous sorting plate 18.

For this reason, even when the grain K etc. falls from the relaxation member 180 (bending part 184) to the part P1, the resistance at the time of passage with respect to the foreign substance S going up on the part P1 is reduced.
For this reason, it is easy to select the specific gravity of the grain K and the foreign matter S also in the part P1, and the foreign matter S such as pebbles selected in front of the part P1 has less resistance and is smooth even in the part P1. Can pass through. Further, in this case, the air blown through the hole 18a helps the foreign matter S to move up in the portion P1.

  Further, the foreign matter S is dispersed and easily moved by the amount of the resistance. Furthermore, since the part P1 is located over the entire width of the perforated sorting plate 18, it is possible to sort the specific gravity uniformly and to move up the foreign matter S over the whole width, so that the sorting efficiency is increased. Further, when the foreign matter S is discharged during the operation, most of the foreign matter S can be discharged, and a stable continuous operation can be performed.

  As shown in FIG. 6, unlike the present embodiment, when the relaxation member 180 and the guide portion 190 are not provided, the grains K and the like that have fallen from the supply hopper 35 are porous without reducing the fall speed. It falls directly on the sorting plate 18. In this case, as in the prior art, the run-up of the foreign matter S is hindered at the portion of the porous sorting plate 18 where the grain K or the like falls.

Returning to the present embodiment, the foreign matter S that has passed through the portion P1 enters the passages 47 and 48 between the guide portion 190 and the relaxation member 180.
Here, when the foreign matter S is located below (ie, in front of) the guide portion 190 and in the vicinity of the front end of the guide portion 190, the guide surfaces 196a and 198a arranged in a V shape are used. , And is guided to enter one of the passages 47 and 48. That is, when the foreign object S moves up, it is guided by one of the guide surfaces 196a and 198a, enters one of the passages 47 and 48, and the foreign object accumulates in front of the V-shaped part. Absent.

  As shown in FIG. 9, since the ventilation member 185 is provided in the relaxation member 180, the air blown through the hole 18 a also enters the passages 47 and 48, and enters the passages 47 and 48. Helps the foreign matter S that has entered the run-up.

  During the sorting operation, the gate 29 is opened at the front end entrance of the pebbles collection unit 17c as shown by the solid line in FIG. 5, and the sorting unit 17a and the pebbles collection unit 17c are communicated with each other. The rear end outlet portion 17d is closed. For this reason, the foreign matter S that has gone up in the passages 47 and 48 is collected in the pebbles collection part 17c.

  And after the input of the grain from the supply hopper 35 is stopped, when the gate 29 is pivotally arranged at the position shown by the chain line in FIG. 5, the front end inlet portion of the pebbles collecting portion 17c is closed, and the sorting portion 17a and The pebbles collection part 17c is shut off. At the same time, the rear end outlet portion 17d of the pebble collecting portion 17c is opened. In this state, due to the swinging of the sorting case 17 and the air blown from the blower 26, the foreign matter S accumulated in the pebble collecting unit 17c is removed from the pebble discharge rod 62 provided on the machine frame 11 via the rear end outlet 17d. Is discharged through.

In FIG. 7, the arrow around the guide portion 190 indicates the moving direction of the foreign matter S, and the arrow on the front end side of the sorting case 17 indicates the moving direction of the grain K.
FIG. 8 shows the shape of the sorting case 200 proposed in Patent Documents 2, 3, and 5. The sorting case 200 has a rear end tapered. For this reason, especially the foreign material which goes up the porous sorting plate 210 provided in the bottom part of the sorting case 200 tends to retain grains and foreign materials in the regions P3 and P4 where the width becomes narrow. For this reason, it is difficult for foreign matter to be discharged to the tapered stone discharging section 220 on the rear end side. Further, in this type of sorting case 200, foreign substances may be mixed into the grain discharge side (front end side) of the sorting case 200 when operated continuously for a long time.

  In the sorting case 200 shown in FIG. 8, it is conceivable to suppress the retention of the grains and foreign matters by increasing the angle θ of the side wall of the sorting case 200 at P3 and P4. However, the sorting distance necessary for sorting the sorting case 200 shown in FIG. 8 (that is, the length in the front-rear direction of the wide area) is shortened, the sorting area of the sorting case 200 is reduced, and the sorting accuracy is reduced. It can be.

  On the other hand, if the length in the front-rear direction of the sorting case 200 is increased in order to increase the sorting area, the perforated sorting plate 210 becomes larger, which increases the size of the sorting case 200 and increases the cost.

  In the present embodiment, a guide portion 190 having V-shaped guide surfaces 196a and 198a is disposed on the rear end side of the sorting case 17, and the foreign matter S is removed through the passages 47 and 48 on both sides in the width direction of the sorting case 17. Let it drain. For this reason, there is no location where the foreign material S and the grain K stay, and the quantity of the grain discharged | emitted to the pebble collection | recovery part 17c side can be reduced. In addition, the sorting case 17 can be downsized, and thus the entire apparatus can be downsized.

  Further, in the passages 47 and 48, the guide surfaces 196a and 198a of the guide portion 190 are arranged obliquely so that the passage entrance is wide, and the rear end sides of the passages 47 and 48 are narrowed. For this reason, the rear end side of the sorting case is formed as wide as the front end side, and the mixing rate of foreign matters mixed with grains is greatly reduced compared to Patent Document 1 in which foreign matters are discharged in full width on the rear end side. it can.

  Note that the blower 26 blows air even after the grain in the supply hopper 35 (input unit) is exhausted. This is because the grains and foreign matters remaining in the passages 47 and 48 are discharged from the rear end outlet portion 17d. Even in this case, it is possible to help the foreign matter and the grain in the passages 47 and 48 to rise by the wind passing through the passages 47 and 48. The foreign matters and grains that have gone up are discharged from the rear end outlet portion 17d.

This embodiment has the following features.
(1) The stone extraction sorter of this embodiment is a sorting case 17 having a perforated sorting plate 18 (a perforated sorting member) at the bottom, which is arranged in an inclined state and is provided with vibrations. Have. Further, the stone extraction and sorting machine includes a supply hopper 35 (feeding unit) for feeding grains into the sorting case 17 and a blower 26 (blowing unit) for blowing air from below the sorting case 17. And the stone extraction sorter sorts the specific gravity of the grains in the sorting case 17 and the foreign matters mixed in the grains by the wind and swinging from the blower 26 (fan section). The stone extraction sorter sends out the specific gravity-selected foreign matter obliquely above the sorting case 17, and sends out the specific gravity-sorted grain diagonally downward.

  And in the stone extraction sorter, between the supply hopper 35 (input part) and the porous sorting plate 18 (porous selection member), a relaxation member 180 (speed) that receives the grains introduced from the supply hopper 35 (input part). (Relaxation part) is arranged. Moreover, the relaxation member 180 (speed relaxation part) makes the grain reach | attain the porous sorting plate 18 (porous sorting member), after reducing the fall speed of the received grain. As a result, according to the present embodiment, the grains input from the supply hopper 35 fall and are received by the relaxation member 180 (speed relaxation unit), and then supplied to the porous sorting plate 18 (porous sorting member). The By receiving the grain and the like by the relaxation member 180 (speed relaxation part), the falling speed of the grain dropped from the supply hopper 35 (input part) is relaxed, and then the porous sorting plate 18 (porous sorting member). To be supplied. For this reason, compared with the conventional case, the foreign matter flows upward on the porous sorting plate 18 (porous sorting member) without obstructing the run-up of foreign matters such as stones on the porous sorting plate 18 (porous sorting member). It becomes easy. As a result, the residence time of the foreign matter on the porous sorting member can be reduced, and the foreign matter can be smoothly moved up.

  (2) In the stone extraction sorter of this embodiment, the relaxation member 180 (speed relaxation part) is provided over the entire width of the sorting case 17. As a result, according to the present embodiment, when the supply port 36 of the supply hopper 35 (input part) is provided over the entire width direction of the relaxation member 180 (porous sorting member), the supply hopper 35 (input part) can be reliably removed from the input part. Can reduce the falling speed of grain.

  (3) In the stone extraction sorter of the present embodiment, the relaxation member 180 (speed relaxation unit) is integrally connected to the first surface 180a that receives the grains from the supply hopper 35 (input unit) and the first surface 180a. And a bent portion 184 (second surface) located below the first surface 180a.

  And the 1st surface 180a is arrange | positioned in the inclination state similarly to the said relaxation member 180 (porous selection member), and the bending part 184 (2nd surface) is connected so that the 1st surface 180a may be made an obtuse angle. .

  As a result, according to the present embodiment, when the grain falling on the first surface 180a moves downward along the first surface 180a, the bent portion 184 (oblique angle with the first surface 180a) Move to the second surface). Thereafter, the grains moving downward from the bent portion 184 (second surface) are sprung upward because the bent portion 184 (second surface) forms an obtuse angle with the first surface 180a. Then, it falls on the porous sorting plate 18 (porous sorting member). At this time, according to the obtuse angle which the bending part 184 (2nd surface) makes with the 1st surface 180a, a grain can be disperse | distributed and it can be made to fall on the porous sorting board 18 (porous sorting member).

  (4) In the stone extraction sorter of the present embodiment, a passage 47 through which foreign matter mixed in the grain goes up between the relaxation member 180 (speed relaxation unit) and the porous sorting plate 18 (porous sorting member), 48 is formed. In addition, guide portions 190 (prevention means) having a V-shaped surface are provided at the entrances of the passages 47 and 48 to prevent foreign matter from staying.

As a result, according to the present embodiment, the residence time of the foreign matter in the passage can be reduced, and the effect of smoothly moving up the foreign matter can be achieved.
(5) In the stone extraction and sorting machine of the present embodiment, the sorting case 17 connects the pair of side walls 170 and 172 that are arranged in the width direction and formed linearly, and the ends of the pair of side walls 170 and 172. And an end wall 174. Further, the end wall 174 is positioned below the relaxation member 180 (speed relaxation portion) and extends on the porous sorting plate 18 (porous sorting member) to have a guide portion 190 having V-shaped guide surfaces 196a and 198a. Is provided as a prevention means. The passages 47 and 48 are formed between the guide surfaces 196a and 198a and the side walls 170 and 172 located proximally. As a result, the effect (4) can be easily realized.

  (6) In the stone extraction sorter of the present embodiment, the relaxation member 180 (speed relaxation unit) allows the introduction of wind from below the porous sorting plate 18 (porous sorting member) into the passages 47 and 48. A ventilation port 185 (wind discharge port) is provided. As a result, according to the present embodiment, since wind is introduced into the passage, it is possible to help the foreign matter to move up in the passage, and the foreign matter can be smoothly moved up.

In addition, embodiment of this invention is not limited to the said embodiment, You may change as follows.
In the relaxation member 180, a plate portion having a wavy or uneven shape on the upper surface may be used instead of the flat plate portion 183.

Instead of fixing the relaxing member 180 to the side walls 170, 172, it may be fixed to the end wall 174. Further, the relaxation member 180 may be fixed to the guide portion 190.
-The bending part 184 of the relaxation member 180 may be omitted.

-The relaxation member 180 does not need to be arranged in parallel with the perforated sorting plate 18, and only needs to be in a state of being inclined forward and downward.
In the above-described embodiment, the supply hopper 35 is an example of the input unit. However, the supply hopper 35 is not limited to the supply hopper as long as the grain K is input to the sorting case 17.

  In the above embodiment, the relaxation member 180 (speed relaxation portion) is provided over the entire width direction of the porous sorting plate 18 (porous sorting member), but the length of the relaxation member 180 (speed relaxation portion) is set in the width direction. The entire length may be shortened. However, it is preferable that the input portion is provided longer than the length in the width direction. Even in this case, the falling speed of the grain from the input portion can be surely reduced.

11 ... Machine frame, 11a ... Opening, 13 ... Rotating shaft, 14 ... Support shaft,
15 ... 1st support roller, 16 ... 2nd support roller, 17 ... Sorting case,
18 ... porous sorting plate (porous sorting member), 18a ... hole, 19 ... first inclined support surface,
20 ... 2nd inclined support surface, 21 ... Drive mechanism, 22 ... Eccentric ring, 23 ... Contact plate,
24 ... Compression spring, 25 ... Mounting plate, 26 ... Blower (blower),
27 ... Fan case, 28 ... Fan, 29 ... Gate, 30 ... Motor,
31 ... Drive pulleys 31, 32 ... Driven pulleys, 33 ... Driven pulleys,
34 ... belt, 35 ... supply hopper (input part), 36 ... supply port,
100 ... sorting screen, 102 ... undulation, 110 ... vibration mechanism, 120 ... fan,
130: Case, 170, 172 ... Side wall, 174 ... End wall,
180 ... relaxation member, 180a ... first surface,
182, flat plate, 183, flat plate portion, 184, bent portion (second surface),
185 ... Ventilation opening (wind discharge opening), 190 ... Guide part, 192 ... Guide wall,
192a ... Guide surface, 194 ... Guide wall, 194a ... Guide surface 196 ... Guide wall, 196a ... Guide surface, 198 ... Guide wall,
198a ... guide surface, K ... grain, Ta ... grain layer, S ... foreign matter.

Claims (6)

A sorting case having a porous sorting member at the bottom, arranged in an inclined state, and provided with vibration, an input unit for throwing grains into the sorting case, and from below the sorting case An air blower that blows air, and the grain in the sorting case and the foreign matter mixed in the grain are subjected to specific gravity sorting by the wind from the blower unit, and the foreign matter subjected to the specific gravity sorting is oblique to the sorting case. In the stone extraction sorter that sends out the grain that has been sent out upward and the specific gravity sorted obliquely downward,
Between the input part and the porous sorting member, a speed relaxation part that receives the grain input from the input part is disposed,
The speed relaxation unit reduces the falling speed of the received grain and then makes the grain reach the porous sorting member.   The stone extraction sorter according to claim 1, wherein the speed relaxation part is provided over the entire width of the sorting case. The speed relaxation unit has a first surface that receives the grain from the input unit, and a second surface that is integrally connected to the first surface and positioned below the first surface,
3. The stone extraction according to claim 1, wherein the first surface is arranged in an inclined state like the porous sorting member, and the second surface is connected so as to form an obtuse angle with the first surface. Sorting machine. Between the speed relaxation part and the porous sorting member, a passage through which foreign matters mixed in the grain rises is formed,
The stone extraction sorter according to claim 3, wherein a prevention means for preventing the foreign matter from staying is provided at an entrance of the passage. The sorting case includes a pair of side walls arranged in the width direction and formed in a straight line, and end walls connecting the ends of the pair of side walls,
The end wall is provided with a guide portion positioned below the speed relaxation portion and extending on the porous sorting member and having a V-shaped guide surface as the prevention means,
The stone extraction sorter according to claim 4, wherein the passage is formed between the guide surface and the side wall located proximally.   6. The stone extraction and sorting machine according to claim 4, wherein the speed relaxation portion is provided with a wind discharge port that allows introduction of wind from below the porous sorting member in the passage.