JP2020078780A - Stone extractor - Google Patents

Abstract

To provide a stone extractor and a stone extracting method which can suppress grains such as rice from being discharged with debris through a stone extracting port as much as possible when discharging debris.SOLUTION: A stone extractor comprises: a slanted perforated plate 13 with permeability which is oscillatably supported in an inclination posture where a side of a grain takeout port is lower and a side of a stone extracting port 12 extracting debris such as a stone is higher; a grain supply passage 14 which supplies the slanted perforated plate 13 with grains to be selection objects; and a selection chamber 15 formed on the slanted perforated plate 13. An air suction device sucking air of the selection chamber 15 is installed so that air is introduced from below through the slanted perforated plate 13 into the selection chamber 15. Since air A in the selection chamber 15 is sucked by the air suction device, air A is sucked through the stone extracting port 12 into the selection chamber 15, the grains X in the selection chamber 15 is restricted from flowing into the stone extraction port 12.SELECTED DRAWING: Figure 6

Description

  TECHNICAL FIELD The present invention relates to a stone removing machine for removing foreign matters such as stones from a grain to be sorted such as rice.

  There is already known a stone removing machine that is installed in the front stage or the rear stage of the rice milling machine and removes foreign matters such as stones from the grain to be sorted such as rice using the difference in specific gravity between these grains and the foreign matter. (For example, Patent Document 1).

  As shown in FIG. 16 to FIG. 19, this stone removing machine 70 has inclined side walls (wire meshes) in which side walls 71 and 72 are erected on the left and right, and a large number of ventilation holes 73a and projections 73b are formed on the entire surface. (Also referred to as a screen) 73 is rocked through a pair of parallel links 76 in an inclined posture in which the side of the stone removing port 74 provided on one side is high and the side of the grain removing port 75 on the other side is low. It is movably supported and has a structure in which it is oscillated in an obliquely vertical direction by a drive motor 78. Below the inclined porous plate 73, a fan casing 80 having a blower fan 79 built therein is provided, and grains such as rice to be sorted are supplied to the central portion 73c of the inclined porous plate 73 from above.

  The ventilation holes 73a and the projections 73b are, as schematically shown in FIGS. 17 and 18, formed on the entire surface of the inclined porous plate 73 except for the stone removing port 74, and pass through the ventilation holes 73a. The lower space of the vent hole 73a is covered so that the air rises obliquely upward toward the stone outlet 74 side. Further, the stone removing port 74 is openable/closable by a stone removing shutter 81, and the stone removing port 74 is normally closed (during a sorting operation except during stone removing).

  Then, when performing the sorting operation, the blower fan 79 is rotated to blow air upward from below the inclined porous plate 73, and while the inclined porous plate 73 is swung, foreign matter is collected on the inclined porous plate 73. Supply mixed untreated grain (grain to be sorted). As a result, air sent obliquely upward from the ventilation holes 73a of the inclined porous plate 73 floats grains such as rice (brown rice or white rice) having a low specific gravity, and foreign substances having a large specific gravity such as stones rock the inclined porous plate 73. Specific gravity is selected according to the operation and collected on the stone removing port 74 side. Here, while the grain such as rice to be sorted is being fed onto the inclined perforated plate 73, it is pushed out from the grain take-out port 75 by the grain fed subsequently and discharged to the next process side. It At this time, the stone removing port 81 is closed by the stone removing shutter 81, and no air flows into the space (also referred to as a sorting chamber) on the inclined porous plate 73 through the stone removing port 74. ..

  On the other hand, when the supply of the grain to be sorted onto the inclined perforated plate 73 is stopped, the grain is not pushed out to the grain extraction port 75 side, so that the grain X remains on the inclined perforated plate 73 as shown in FIG. At the same time, the foreign matter Y is mixed with the grain X and gathered at the place where the stone removing port 74 is provided on the inclined porous plate 73. Therefore, in a state in which the blowing operation and the swinging operation are continued, the stone removing port 74 is thereafter opened by the stone removing shutter 81, and the foreign substance Y accumulated in the stone removing port 74 and the foreign substance Y in the vicinity thereof (however, , A part of the grain X is also discharged), so that the grain X and the foreign matter Y are gravity-sorted.

  In addition, in the stone removing machine 70 disclosed in Patent Document 1 and the like, as shown in FIGS. 17 and 19, a grain collection passage 83 is formed outside the side wall portion 72 on one side of the inclined porous plate 73. At the same time, a grain collection port 84 that communicates with the grain collection passage 83 is formed (opened) in a part of the side wall portion 72 (specifically, a portion near the stone removal port 74). The grain collection port 84 is provided with a collection passage shutter 85 that can be opened and closed (sliding freely). A number of ventilation holes 73d are also formed in the grain collection passage 83, but air may rise obliquely upward from the ventilation holes 73d toward the grain extraction port 75' (see FIG. 17). The grain that has been configured and has flowed into the grain recovery passage 83 is sent to the grain outlet 75 ′ side.

  Then, as described above, after the stone removing port 74 is opened and the grain X and the foreign matter Y are discharged from the stone removing port 74, the collecting passage shutter 85 is opened and the grain is collected through the grain collecting passage 83. However, in this state, since grain remains between the stone removing port 74 and the grain collecting port 84 on the inclined porous plate 73, the stone removing port 74 is opened again after that and the grain on the inclined porous plate 73 is further opened. Is configured to be discharged.

JP, 11-28425, A

  However, in the above-described conventional stone removing machine 70, when the stone removing port 74 is opened and the foreign matter is taken out, the grains are mixed in a certain ratio. At this time, if the amount of mixed grain is large, the amount of grain that can be sorted (collected) by the sorting operation is reduced accordingly, and the grain collection rate (so-called yield) is reduced.

  The present invention is to solve the above problems, and an object of the present invention is to provide a stone removing machine and a stone removing method that can minimize the grain discharged from the stone removing port mixed with the foreign matter when the foreign matter is discharged. To do.

  In order to solve the above problems, the stone removing machine of the present invention swings in an inclined posture in which the grain outlet side for taking out grains such as rice to be sorted is low and the stone outlet side for discharging foreign matters such as stones is high. A stone removing machine provided with a sloping perforated plate which is supported so as to have air permeability, a grain supply passage for supplying grains to be sorted onto the slanted perforated plate, and a sorting chamber formed on the slanted perforated plate. An air suction device for sucking the air in the sorting chamber so that the air is introduced into the sorting chamber from below through the inclined porous plate, and the air suction device sucks the air in the sorting chamber to remove stones. Air is sucked into the sorting chamber through the mouth as well, so that the grain to be sorted in the sorting chamber is restricted from flowing into the stone removing port.

  According to this configuration, when the sorting operation is performed while supplying the grain to be sorted such as rice to the inclined perforated plate, air is introduced from below through the inclined perforated plate into the upper sorting chamber by the air suction device. When the air in the sorting chamber is sucked, the air is sucked into the sorting chamber also through the stone removing port, and the inflow of the grain in the sorting chamber into the stone removing port is regulated. This can minimize the grain discharged through the stone shed.

  In addition, it is preferable that the suction opening for sucking air in the sorting chamber is formed so as to face the sorting chamber from above. With this configuration, rice can be favorably lifted on the inclined porous plate.

  Further, the stone removing machine of the present invention is characterized in that it is provided with a stone removing unit air volume adjusting body for adjusting the amount of air sucked into the sorting chamber through the stone removing port. According to this configuration, by providing the stone removing portion air volume adjusting body, the air sucked through the stone removing opening pushes back the grains so that they are well separated from the stone removing opening, and the foreign matter is removed from the stone removing opening without trouble. It can be satisfactorily adjusted so that the amount of air discharged can be obtained.

  Further, the stone removing machine of the present invention is characterized in that air is introduced from the side into the space below the inclined porous plate. According to this configuration, even when air cannot be sucked into the space below the inclined porous plate from directly below, air (outside air) can be satisfactorily introduced into the space below the inclined porous plate from the side.

  Further, the stone removing machine of the present invention is characterized in that an inflow amount equalizing body for equalizing the inflow amount of air into the inclined porous plate so as not to be biased to a specific region is attached below the inclined porous plate. And According to this configuration, even when air is introduced from a part of the inclined porous plate facing the lower space (for example, when air is introduced from the side), the inflow amount of air into the inclined porous plate is in a specific region. The grains on the slanted perforated plate can be favorably floated and sorted.

  Further, the stone removing machine of the present invention is such that the stone removing port communication passage communicating with the stone removing port and the discharge route switching connected to the stone removing port to switch the discharge route to the foreign substance discharging portion side or the grain collecting passage side for collecting grain And a gate are provided.

  According to this configuration, the discharge path switching gate discharges foreign matters such as stones discharged from the stone removing port to the foreign substance discharging portion side, and discharges the grain discharged from the stone removing port to the grain collecting passage side. can do.

  Further, the stone removing machine of the present invention is characterized in that a stone removing port communication passage communicating with the stone removing port is provided with a partition wall portion that blocks the open air introducing space below the inclined porous plate so as not to communicate with the outside air introducing space. To do. With this configuration, it is possible to favorably prevent the air that has entered the stone extraction passage from flowing into the outside air introduction space below the inclined porous plate, and it is possible to ensure the amount of air flowing to the stone extraction port.

  Further, the stone removing machine of the present invention is characterized in that a grain collecting passage for collecting grains remaining on the inclined perforated plate is provided below the inclined perforated plate. With this configuration, the grain remaining on the inclined porous plate can be discharged through the grain recovery passage provided below the inclined porous plate.

  Further, the stone removing machine of the present invention is sucked into the sorting chamber through the grain discharging opening when the amount of the grain taken out is reduced to the grain discharging opening where the selected grain is communicated with the grain discharging outlet to the outside. It is characterized by being provided with an opening/closing lid for reducing the amount of air to be taken.

  With this configuration, when the amount of grains taken out has decreased due to the end of grain supply, the opening/closing lid provided at the grain taking-out opening is closed to reduce the amount of air sucked into the sorting chamber through the grain taking-out opening. Can be kept to a minimum. As a result, it is possible to prevent air from being sucked into the sorting chamber through the grain extraction opening, reducing the amount of air sucked through the stone removal port, and making it difficult to regulate the inflow of grain into the sorting chamber from the grain removal port. can do.

  Further, the stone removing machine of the present invention is characterized in that the inclined perforated plate is disposed so as to be taken out from the stone removing port side toward the grain removing port side. With this configuration, it is possible to take out the inclined porous plate to the outside regardless of the shape of the inclined porous plate and the mechanism that drives the guide unit that guides foreign matters and grains discharged from the stone removal port. This makes it easier to perform maintenance on plates and the like.

  Further, the stone removing machine of the present invention is provided with a control unit for controlling the air suction device, or is connected to the stone removing machine, and the control unit operates the air suction device during the sorting operation for sorting grain and foreign matter, The feature is that the air suction device is stopped at the time of grain collection for collecting the grain remaining on the inclined porous plate from the stone removal port.

  Further, in the stone removing method of the present invention, the inclined porous plate having air permeability is supported so as to be swingable in an inclined posture in which the grain outlet side is low and the stone outlet side for discharging foreign matters such as stones is high. , Through the inclined perforated plate from below to suck air with an air suction device so that air is introduced into the sorting chamber provided on the inclined perforated plate, and air is also introduced into the sorting chamber through the stone removal port. It is characterized in that air is sucked by the suction device and that the grain to be sorted supplied into the sorting chamber is prevented from flowing into the stone sampling port by the air introduced into the sorting chamber through the stone sampling port.

  According to this destoning method, the air introduced into the sorting chamber through the destoning port restricts the grain supplied into the sorting chamber from flowing into the destoning port, so that the grain discharged through the destoning port is controlled. Can be minimized.

  Further, in the stone removing method of the present invention, when the foreign matter is discharged through the stone removing port, the air is sucked by the air suction device so that the air flows into the sorting chamber through the stone removing port while swinging the inclined porous plate. After sucking the foreign matter through the stone removal port, while swinging the inclined porous plate, stop the air suction by the air suction device and collect the grains remaining on the inclined porous plate through the stone removal port. It is characterized by doing.

  According to this stone removing method, after the foreign matter is discharged through the stone removing port, the suction of air by the air suction device is simply stopped while swinging the inclined porous plate, and the inclined porous plate is passed through the stone removing port to be placed on the inclined porous plate. The remaining grain can be discharged.

  According to the present invention, an air suction device for sucking air in the sorting chamber is provided so that the air is introduced into the sorting chamber from below through the inclined porous plate, and the air in the sorting chamber is sucked by the air suction device. The air is sucked into the sorting chamber even through the stone removing port, and the grain inflow into the sorting chamber is regulated so that the grain can flow into the sorting chamber. It is possible to minimize the amount of grains mixed with foreign matter and discharged. As a result, the amount of grains that can be sorted (collected) by the sorting operation can be increased to the maximum, and the grain collection rate (so-called yield) can be improved.

  Further, by providing a stone removing part air volume adjusting body for adjusting the amount of air sucked into the sorting room through the stone removing port, the air sucked through the stone removing port pushes back the grain away from the stone removing port, and Therefore, it is possible to properly adjust the air volume so that the foreign matter can be discharged from the stone removing port without hindrance.

  Further, by installing an inflow amount equalizing body that equalizes the inflow amount of air into the inclined porous plate so as not to be biased to a specific area, the space below the inclined porous plate is exposed. Even when introducing air from a part, it is possible to equalize the amount of air flowing into the inclined perforated plate so as not to be biased relative to a specific area, and to make the grains on the inclined perforated plate float up well. It becomes possible to select.

  In addition, by providing an opening/closing lid at the grain extraction opening that takes out the selected grains to the outside, the amount of air sucked through the stone removing port is reduced, and the inflow of grains into the selecting chamber is regulated. It is possible to prevent the difficulty (and eventually the yield decrease).

  When ejecting foreign matter through the stone removing port, while swinging the inclined perforated plate, air is sucked by the air suction device so that air can flow into the sorting chamber through the stone removing port as well. After the foreign matter is discharged, the air suction device stops the air suction while swinging the slanted perforated plate, and the grains remaining on the slanted perforated plate are discharged through the stone removal port to allow the slanted perforated plate to pass through the stone removal port. Grains on the inclined perforated plate can be discharged.

It is a figure which shows simply the automatic rice-polishing apparatus (so-called coin rice-polishing equipment) which is an installation example incorporating the stone removing machine which concerns on embodiment of this invention. It is the whole isometric view which looked at the stone removing machine which concerns on embodiment of this invention from diagonally backward. It is the whole perspective view which looked at the same stone removing machine from the slanting front. FIG. 2 is a perspective view of the stone removing machine showing a swing housing and a drive mechanism thereof. FIG. 2 is a vertical sectional side view of the stone removing machine showing a swing housing and the like. FIG. 3 is a vertical cross-sectional side view of a main part of the stone removing machine, showing a portion of the swing housing closer to the front side. It is a longitudinal cross-sectional view of the inclined porous plate of the stone removing machine. FIG. 3 is a vertical cross-sectional perspective view of a main part of the stone removing machine showing a swing housing and the like. FIG. 3 is a perspective view of a rocking housing of the stone removing machine, showing a state in which an upper surface portion is omitted. FIG. 3 is a perspective view of a rocking housing of the stone removing machine, showing a state in which an inclined porous plate or the like is drawn out. FIG. 2 is a vertical cross-sectional view showing a discharge path switching gate, a gate switching mechanism, and the like of the stone removing machine, showing a state during a sorting operation (when removing stones). FIG. 3 is a vertical cross-sectional view showing a discharge path switching gate and a gate switching mechanism of the stone removing machine, showing a state at the time of collecting remaining rice. It is an expansion perspective view of the rear part of the rocking housing of the stone removing machine. The modification of the discharge path switching gate and the gate switching mechanism of the stone removing machine is shown, and the state at the time of the sorting operation (at the time of stone removing) is shown. The modified example of the discharge route switching gate and the gate switching mechanism of the stone removing machine is shown, and the state at the time of remaining rice recovery is shown. It is a side view which shows the conventional stone removing machine roughly. FIG. 6 is a plan view of an inclined porous plate of the conventional stone removing machine and a portion in the vicinity thereof. It is sectional drawing of the inclination porous plate of the same conventional stone removing machine. It is a principal part top view of a stone removing port of the conventional stone removing machine and its vicinity.

Hereinafter, a stone removing machine according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and the like, the stone removing machine 10 according to the embodiment of the present invention is provided, for example, in a front stage of the rice polishing machine 1. Then, grains such as brown rice (which may be grains other than rice, but in the following, the case where the sorting target is rice (brown rice, etc.) will be explained) and foreign substances such as stones Are removed by utilizing the difference in specific gravity between these rice and foreign substances.

  Here, FIG. 1 shows an example of an installation example in which the stone removing machine 10 is incorporated, and the stone removing machine 10 automatically inserts money such as coins and bills to automatically perform a rice polishing operation. The example shown is installed in a rice polishing device (so-called coin rice polishing equipment). As shown in FIG. 1, for example, the automatic rice-polishing device is put in the hopper 2 and the hopper 2 as a stake container into which a rice-polished object such as brown rice (rice) is put by a user. A lifting elevator 3 including a bucket conveyor that raises and conveys a rice-polishing target, and a contaminant removing device 4 that is provided with a net conveyor 4a and the like to remove relatively large contaminants such as straws and nails. And a stone removing machine 10 according to an embodiment of the present invention that removes foreign substances such as stones that are mixed in a rice-polishing target (which is also a grain to be sorted) such as brown rice, and brown rice from the stone removing machine 10 above the brown rice. Elevator 6 for rice polishing consisting of a bucket conveyor that conveys to the tank 5, rice polishing machine 1 for whitening (polished) brown rice supplied from the brown rice tank 5, and white rice hopper 7 for discharging the white rice processed by the rice polishing machine 1. And so on. Then, the brown rice or the like put into the stake hopper 2 is conveyed to the foreign matter removing device 4 via the stake elevator 3 to remove foreign matters such as straw, and the stone removing machine 10 removes stones and the like. The foreign matter is removed, and the brown rice from which the foreign matter is removed is conveyed through the rice-polishing elevator 6 and is polished by the rice-polishing machine 1 to be white rice. In addition, 8 is a rice-polishing drive motor for driving the rice-polishing roll 1a of the rice-polishing machine 1, and 9 is a bran fan for sucking bran generated in the rice-polishing machine 1.

  In this way, the stone removing machine 10 is arranged, for example, downstream of the foreign matter removing device 4 and the lifting elevator 3, and is supplied with grains such as rice to be sorted (brown rice, etc.). Remove foreign substances such as stones from the target grain). However, the stone removing machine 10 is not limited to being provided inside the automatic rice polishing apparatus, and the stone removing machine 10 may be provided as a single unit and grains such as rice to be sorted are directly supplied. .. Reference numeral 65 in FIGS. 2, 3 and 5 is a grain collection box for collecting grains such as sorted rice, which is provided when the stone removing machine 10 is provided as a single unit. When the rice is provided inside, the sorted rice is transported (supplied) to, for example, the input part side of the rice polishing elevator 6. Further, the stone removing machine 10 may be provided in the latter stage of the rice milling machine 1 so as to remove foreign matters such as stones from rice (grain) such as white rice by utilizing a difference in specific gravity between these rice and the foreign matters. Good.

  As shown in FIGS. 5 to 8, the stone removing machine 10 according to the embodiment of the present invention has a low grain removal port (rice removal port) 11 side (also referred to as a rear side), and foreign matter such as stones and rice An inclined porous plate (also referred to as a wire mesh or a screen) 13 having air permeability, which is swingably supported in an inclined posture in which a side of a stone outlet 12 (also referred to as a front side) for discharging air is raised, and an inclined porous plate 13 A grain supply passage (rice supply passage) 14 for supplying grains (rice) B to be sorted upward, a sorting chamber 15 formed on the inclined porous plate 13, and the like are provided. Specifically, the inclined porous plate 13 is housed in a swing housing (swing box) 16 including left and right side plate portions 16a, a back surface portion 16b, a front surface portion 16c, an upper surface portion 16d, and the like, and the swing housing 16 is It is swingably supported by the mechanism of the parallel link 17. A space on the slanted porous plate 13 in the swing housing 16 serves as a sorting chamber 15, and the sorting chamber 15 includes the swing housing 16, the sorting chamber side wall portion 25 standing on the left and right of the slanted porous plate 13, the sorting chamber. It is covered with a back wall portion 26 (see FIGS. 7 and 9) and the like.

  As shown in FIGS. 2 to 6 and 8, for example, the upper surface portion 16d of the swing housing 16 and the sorting chamber 15 have a substantially trapezoidal shape in a side view, and are connected to the downstream side of the foreign matter removing device 4 and the like by a supply connection tube. The grain supply passage 14 connected via 27 or the like projects into the sorting chamber 15 of the swing housing 16 from diagonally above, but is not limited to this. Further, in this embodiment, a transparent plate or the like is fitted in a part of the upper surface portion 16d of the swing housing 16 so that the state in the sorting chamber 15 (behavior of grain or foreign matter) can be satisfactorily observed from the outside. However, it is not limited to this. In addition, 18 and 19 in FIGS. 2 to 4 and the like are a support frame and a support plate, and these support frame 18 and the support plate 19 support the contaminant removing device 4 and an air suction device 30 described later on the upper part thereof. The swing housing 16 and the like are swingably supported by a lower portion thereof via a parallel link 17. The support frame 18 includes a plurality of vertical support frames 18a, a plurality of horizontal support frames 18b, and the like, and the support plate 19 includes a plurality of side surface support plates 19a and a front support plate 19b. Note that, in FIG. 4 and the like, a part of the side surface support plate 19a, the front surface support plate 19b, the back surface support plate 19c, and the like are removed for easy understanding.

  As shown in FIG. 4 and the like, the parallel link 17 is rotatably supported by the side surface support plate 19a and the like at the base end side thereof, and the rotational force of the swinging motor 20 fixed to the front support plate 19b and the like is applied. It is transmitted to the swing housing 16 via the transmission belt 21, the rotary pulley 22, the rotary shaft 23, the swing cam 24, etc., and the swing housing 16 is swung in the front-rear direction and the vertical direction.

  As shown in FIG. 7, the inclined perforated plate (also referred to as a wire mesh or screen) 13 is provided with ventilation holes 13a and protrusions 13b over the entire surface except for the stone removing port 12 and the rice removing port 11. The air is covered so as to rise obliquely upward toward the stone outlet 12 side through the ventilation holes 13a. Further, as shown in FIGS. 8 and 9, the side wall 25 of the sorting chamber is formed so that the width on the stone removal port 12 side is gradually narrowed in the left-right direction in plan view. It is connected to the stone outlet 12 at the place where the width on the left and right sides is the narrowest. Further, the stone removing port 12 is opened downward, and the upper space of the stone removing port 12 is surrounded from the left and right sides and the front side by a standing wall portion continuing to the side wall 25 of the sorting chamber. Further, the grain outlet 11 is opened at the rear end of the sorting chamber side wall 25, but the sorting chamber side wall 25 is extended to the rear of the grain outlet 11 and the sorting chamber rear wall 26 is assembled. A handle 26a is provided on the rear wall 26 of the sorting chamber. Here, as shown in FIG. 10, the inclined porous plate 13, the side wall 25 of the sorting chamber, and the rear wall 26 of the sorting chamber are directed from the stone removal port 12 side toward the grain removal port 11 side (that is, toward the rear). It is arranged so that it can be taken out to the outside. A guide rail (not shown) that guides the inclined porous plate 13 and the like backward and backward is preferably attached inside the left and right side plate portions 16a of the swing housing 16.

  In addition to the above configuration, as shown in FIG. 2, FIG. 3, etc., the air inside the sorting chamber 15 is introduced into the stone removing machine 10 so that the air is introduced into the sorting chamber 15 from below through the inclined porous plate 13. An air suction device 30 for sucking air is provided. In this embodiment, the air suction device 30 is composed of a suction fan, one end (upper end) of the suction tube 31 is connected to the suction side of the air suction device 30, and the other end (lower end) of the suction tube 31. Is connected to the suction cylinder 32 that is connected to the upper surface of the sorting chamber 15. Further, as shown in FIG. 5 and the like, a suction opening 33 that is a communication portion between the suction cylinder portion 32 and the sorting chamber 15 and sucks the air A in the sorting chamber 15 faces the sorting chamber 15 from above. Is formed in.

  By sucking the air A in the sorting chamber 15 by the air suction device 30 during the sorting operation, the air A is also sucked into the sorting chamber 15 through the stone removing port 12, and the grain (rice) in the sorting chamber 15 is sucked. Is configured to be restricted from flowing into the stone outlet 12. It is preferable to connect a dust-collecting bag having air permeability to the exhaust side of the air suction device 30, but the present invention is not limited to this. Further, in this embodiment, the case where the air suction device 30 is arranged on the side of the foreign matter removal device 4 is shown, but the present invention is not limited to this, and the air suction device 30 is provided inside the sorting chamber 15. It may be installed in any place as long as it can suck the air.

  As shown in FIG. 4 and FIG. 5, outside air introduction openings 35 opened in a substantially rectangular shape extending obliquely in the front-rear direction are provided at lower portions of the left and right side plate portions 16a of the swing housing 16. Has been formed. The outside air introduction opening 35 is formed below the place where the inclined porous plate 13 and the inflow amount equalizing body 36 described later are arranged in the swing housing (swing box) 16, and these outside air introduction openings 35 are formed. External air A is introduced from 35 from both sides. Further, in the swing housing (swing box) 16 below the inclined porous plate 13 and above the outside air introduction opening 35, a posture below the inclined porous plate 13 with a predetermined interval ( The inflow amount equalizer 36 is arranged in a posture substantially parallel to the inclined porous plate 13 so that the inflow amount equalizer 36 does not bias the inflow amount of the air A into the inclined porous plate 13 with respect to a specific region. Are equalized to. In this embodiment, the inflow equalizer 36 is an intake hole larger than the ventilation hole 13a of the inclined porous plate 13 (in this embodiment, for example, a circular hole, but the shape of the hole is rectangular or polygonal). 36a is formed of a plate-like body such as a punching plate that is evenly formed in front, rear, left and right. Since the inflow amount equalizing body 36 is provided, the region at the center in the width direction of the inclined porous plate 13 (that is, the region distant from the regions near both sides close to the outside air introduction opening 35). Also, the outside air is easily introduced, and the inflow amount of air into the inclined porous plate 13 is equalized so as not to be biased with respect to a specific region.

  In addition, the inflow equalizer 36, along with the inclined porous plate 13, the side wall 25 of the sorting chamber, the back wall 26 of the sorting chamber, and the like from the side of the stone removing port 12 toward the side of the rice outlet 11 (that is, toward the rear). It is preferable that it is arranged so that it can be taken out to the outside. Further, as a plate-like body such as a punching plate used for the inflow-amount equalizing body 36, a plate-like body such as a plurality of types of punching plates having different diameters of the intake holes 36a is provided, and the inflow amount of air can be favorably equalized. It may be configured so that it can be replaced with a plate-shaped body. Note that, in FIGS. 5 and 6, the intake holes 36a of the inflow equalizing body 36, the ventilation holes 13a of the inclined porous plate 13, and the protrusions 13b are omitted and shown schematically.

  In addition, as shown in FIGS. 5 to 9, a stone removing part air volume adjusting body for adjusting the amount of air sucked into the sorting chamber 15 through the stone removing port 12 is provided above the stone removing port 12 in the sorting chamber 15. 37 is provided. That is, when the amount of air sucked into the sorting chamber 15 through the stone outlet 12 during the sorting operation (during suction) or the suction speed is too large, foreign matters such as stones are less likely to be discharged. If the amount of air sucked into the sorting chamber 15 through the outlet 12 or the suction speed is too small, grains are easily discharged. Therefore, when the air suction device 30 is operated during the sorting operation (during suction) and the air A is sucked into the sorting chamber 15 through the stone removing port 12, the air A is sucked into the sorting chamber 15 through the stone removing port 12. By the air A, the grain (rice) X to be sorted floating from the inclined porous plate 13 is pushed back to the side of the rice outlet 11 (rear side) diagonally below and the inflow to the stone removing port 12 is regulated ( On the other hand, the foreign matter Y is pushed back by the air A flowing in from the stone removing port 12 to the stone removing port 12 side (front side) diagonally above by the rocking motion while being placed on the inclined porous plate 13. The stone removal portion air volume adjusting body 37 is arranged at a position where it moves (overcoming the inflowing air) without moving.

  The stone removing part air volume adjusting body 37 may be arranged in a movable state so that the mounting position can be adjusted by sliding up and down, for example, but the invention is not limited to this and is fixed at a position where a suitable air volume is obtained. It may be attached and attached. In addition, for example, the stone removing part air volume adjusting body 37 can increase the height of the sorting target grain X floating from the inclined porous plate 13 so that the sorting target grain X floating from the inclined porous plate 13 can be favorably pushed back by the air. It is preferable to dispose it at a position slightly higher than the height, but it is not limited to this. Further, as shown in FIGS. 8 and 9, the place where the stone removing port 12 and the stone removing portion air volume adjusting body 37 are provided has a width narrower than that of the rice outlet 11 side region of the inclined porous plate 13 for comparison. Even when the air suction device 30 with a relatively small air volume is used, the location where the stone removing port 12 and the stone removing portion air volume adjusting body 37 are provided has a good air volume, and the time for performing the stone discharging operation can be shortened. Has been.

  As shown in FIG. 5, FIG. 6, FIG. 8, etc., the stone removing port 12 is provided with a stone removing port communication passage 34 that communicates with the stone removing port 12 in a state of extending downward. Further, a partition wall portion 29 is provided to block the stone outlet communication passage 34 so as not to communicate with the outside air introduction space below the inclined porous plate 13.

  Further, as shown in FIG. 5, FIG. 6, FIG. 8 and the like, foreign matters such as stones discharged through the stone removing port communication passage 34 are discharged to the foreign substance discharging portion side below the stone removing port communication passage 34. A discharge path switching gate 40 is provided for switching the grain discharged through the stone outlet communication passage 34 to the grain recovery passage (remaining rice discharge passage) 39 side. Further, as shown in FIGS. 2, 3, 5, etc., the front support plate 19b attached to the lower front surface of the vertical support frame 19a has a foreign matter collection box as a foreign matter discharge section for collecting foreign matter such as stones. 38 is attached. Further, as shown in FIG. 5, FIG. 8, etc., the grain collection for collecting the grain (remaining rice) remaining on the inclined perforated plate 13 after the sorting operation (stone removal operation) through the stone removal port 12 The passage 39 is provided below the inclined porous plate 13 and the inflow equalization body 36. The grain collecting passage 39 is in a posture along the inflow amount equalizing body 36 in the swing housing (swing box) 16 at a predetermined distance downward (a posture substantially parallel to the inclined porous plate 13 and the inflow amount equalizing body 36). ) Is arranged.

  Then, as shown in FIG. 11, during the sorting operation (during stone removal), the discharge path switching gate 40 switches to a tilted posture in which the front side portion of the discharge path switching gate 40 is downward by the gate switching mechanism 45 described later. Thus, the foreign matter such as the stone Y discharged through the stone outlet communication passage 34 is guided to and collected in the foreign matter collection box 38 on the foreign matter discharge portion side. Further, as shown in FIG. 12, when the grain X (remaining grain X′) remaining on the inclined perforated plate 13 after the sorting operation (stone removing operation) is finished is collected through the stone removing port 12, it is discharged. The route switching gate 40 is switched by the gate switching mechanism 45 to the tilted posture in which the rear side portion of the discharge route switching gate 40 is downward, so that the residual grain X′ discharged through the stone outlet communication passage 34 is returned to the remaining rice collection passage. Guide to 39 side and collect. As will be described later, at the time of grain collection, the suction of the air A by the air suction device 30 is stopped, and the grain X(X′) on the inclined porous plate 13 is collected through the stone removing port 12. In this embodiment, the gate support frame 41 is attached to the front support plate 19b in front of the passage frame forming the stone removal passage 34, and the gate support frame 41 is provided so as to penetrate right and left. The discharge path switching gate 40 is rotatably (swingably) supported about the gate support shaft 42, but the present invention is not limited to this.

  The gate switching mechanism 45 is configured as follows, for example. As shown in FIG. 5, FIG. 8, FIG. 11, FIG. 12, etc., a motor support bracket 43 mounted so as to be bridged between the left and right side surface support plates 19a at a lower portion such as a front end portion of the grain recovery passageway 39. A gate switching motor 46 is attached so that the drive rotation shaft 46a extends laterally through the drive rotation shaft 46a, and a rotation arm 47 is attached to the drive rotation shaft 46a. Further, a rear projection 40a protruding downward is provided on the rear lower surface of the discharge path switching gate 40, and the mounting rear projection 40a and the tip of the rotary arm 47 are connected by a connecting wire 48. Further, a front projection 40b that protrudes downward is provided on the lower surface of the front portion of the discharge path switching gate 40, and a locking projection 49 is attached to the front support plate 19b at a position substantially below the gate support shaft 42. A tension spring 50 is attached across the protrusion 40b and the locking protrusion 49. In FIGS. 11 and 12, 51 is an upper position detection sensor that detects that the rotary arm 47 is at the upper position, and 52 is a lower position detection sensor that detects that the rotary arm 47 is at the lower position. .. Further, it is preferable to use a motor with a built-in gear as the gate switching motor 46, but the invention is not limited to this.

  During the sorting operation (during stone removal), as shown in FIG. 11, the gate switching motor 46 is rotated so that the rotary arm 47 is located at the upper position, and the pulling force of the tension spring 50 causes the discharge path switching gate 40. The tilted posture is such that the front part of the is downward. At this time, the connecting wire 48 is in a slackened state. As a result, during the sorting operation (when removing stones), the foreign matter Y such as stones discharged through the stone removing opening 12 and the stone removing opening communication passage 34 is guided by the discharge path switching gate 40 to the foreign matter discharging portion side. It is discharged to the foreign matter collection box 38. On the other hand, as shown in FIG. 12, at the time of grain collection, the gate switching motor 46 is rotated so that the rotating arm 47 is located at the lower position, and the connecting wire 48 switches the discharging path against the tensile force of the tension spring 50. The rear side portion of the gate 40 is switched to a pulled posture in which the rear portion is downward. As a result, during grain recovery (during stone removal), the residual grain X′ collected through the stone removal port 12 and the stone removal communication passage 34 is guided to the discharge route switching gate 40 and discharged to the grain recovery passage 39. To be done.

  Further, as shown in FIGS. 5 and 8, in this embodiment, the grain extraction port 11 is provided behind the inclined porous plate 13 so as to open between the grain extraction port 11 and the rear wall 26 of the sorting chamber. Further, a grain extraction communication passage 55 that extends downward from the grain extraction port 11 is connected to the grain extraction port 11. A rear partition wall portion 56 that extends vertically to the front side of the grain extraction communication passage 55 and blocks the grain extraction communication passage 55 from communicating with the outside air introduction space below the inclined porous plate 13 is provided. Has been.

  In addition, as shown in FIGS. 5 and 8, the back surface portion 16b of the rocking housing (rocking box) 16 extends downward so as to continue to the rear wall portion 26 of the sorting chamber and the back surface of the grain extracting communication passage 55. Although it is a part of the oscillating housing (oscillating box) 16, a lower portion of the back surface portion 16 b of the oscillating housing 16 communicates with the grain extracting port 11 via the grain extracting communication passage 55 to select the selected grain. A grain extraction opening (good product outlet) 57 is provided for taking out the grain. Then, as shown in FIG. 5, FIG. 8, FIG. 9, FIG. 13, etc., the grain extraction opening 57 is taken out when the grain (rice) to be sorted into the sorting chamber 15 is finished. An opening/closing lid 58 is provided to reduce the amount of air sucked into the sorting chamber 15 through the grain extraction opening 57 when the amount of grain extracted through the opening 57 decreases. In this embodiment, the opening/closing lid 58 has a substantially horizontally long rectangular shape, and the upper side portion is supported by a hinge (hinge portion) 58a so as to be openable and closable. The opening/closing lid 58 is configured to close the grain extraction opening 57 by the suction force of the air in the sorting chamber 15 by the air suction device 30 and the weight of the opening/closing lid 58 when the grain is exhausted. The swing housing (swing box) 16 guides the grain (non-defective product) taken out from the grain removal opening 57 and the grain (non-defective product) discharged from the grain collecting passage 39 by the residual grain discharge operation described later. The grain (non-defective product) guide member 59 is attached, and the grain (non-defective product) discharged while being guided by the grain (non-defective product) guide member 59 is conveyed to the next process side (elevator 6 or rice mill 1) or the grain (rice) ) Is taken out as a good product.

  Further, a control unit (not shown) is provided in the automatic rice polishing apparatus provided with the stone removing machine 10 and is connected to the stone removing machine 10. By this control unit, each of the stone removing machines 10 including the air suction device 30 is provided. The drive unit (drive motor 20 and gate switching motor 46) and the like are controlled. Then, the air suction device 30 is operated during the sorting operation for sorting the grain (rice) and the foreign matter by this control unit, and the suction operation is performed, while the grain X′ remaining on the inclined porous plate 13 is destoned. At the time of collecting the grain to be collected from 12, the air suction device 30 is stopped so that the suction operation is not performed and only the swinging operation is performed. When the stone removing machine 10 is provided alone without being incorporated in the automatic rice polishing apparatus, a control unit having the same function is provided in the stone removing machine 10.

  In the above configuration, when the grain (rice) containing foreign matters such as stones is supplied onto the inclined porous plate 13 in the sorting chamber 15, the stone removing port 12 is used as shown in FIGS. 6 and 8. A sorting operation (stone removing operation) for discharging foreign matter is performed. That is, the drive motor 20 is driven to rock the rocking housing (rocking box) 16 provided with the tilted porous plate 13 and the sorting chamber 15 and the air suction device 30 is driven to tilt the tilted porous plate. Air A is introduced from the lower side into the upper sorting chamber 15 through the plate 13, and the air A is sucked into the sorting chamber 15 through the stone removing port 12. At this time, as shown in FIGS. 6 and 11, the discharge path switching gate 40 is switched to an inclined posture in which the front side portion thereof is downward.

  The air A sucked obliquely upward from the ventilation holes 13a of the inclined porous plate 13 causes the grain X made of rice such as brown rice and white rice having a small specific gravity to float on the inclined porous plate 13. Further, foreign matter Y having a large specific gravity such as stones is sorted by the specific gravity according to the swinging motion of the inclined porous plate 13 and collected on the stone removing port 12 side. In this case, the air suction operation of the air suction device 30 not only introduces the air A from below into the upper sorting chamber 15 through the inclined porous plate 13, but also through the stone removing port 12 into the sorting chamber 15 as well. Since A is sucked, the grain (such as brown rice which is the grain to be sorted) X in the sorting chamber 15 is prevented from flowing into the stone removing port 12 and regulated. As a result, almost only the foreign matter Y such as stones can be collected in the foreign matter collection box 38 through the stone removing port 12 and the stone removing port communication passage 34.

  Further, since the grain (such as brown rice to be sorted) X in the sorting chamber 15 is prevented from flowing into the stone outlet 12, the grain B(X) to be sorted such as rice B (X) has a slanted porosity. While being fed onto the plate 13, the grain B(X), which is subsequently fed, pushes the grain out from the grain outlet 11, and the grain extracting communication passage 55 and the grain outlet (good product outlet). 57, the grain (non-defective product) guide member 59 is transferred to the next process side (elevator 6 or rice mill 1) or the rice is taken out as non-defective product.

  As a result, the grain discharged through the stone outlet 12 can be almost eliminated or minimized with a relatively simple structure. Therefore, it becomes possible to increase the amount of the grain X sorted (collectable) by the sorting operation to the maximum, and the collection rate (so-called yield) of the grain X can be improved. Further, conventionally, it was necessary to dispose of grains mixed with foreign matters such as stones, but such disposal costs can be reduced to a minimum.

  When the grain to be selected, such as brown rice, has been supplied to the sorting chamber 15, at the timing when the foreign matter is no longer discharged from the stone removing port 12, as shown in FIG. The side portion is switched to the inclined posture in which the side portion is downward, and the air suction operation of the air suction device 30 is stopped. As a result, the grain X′ remaining on the slanted porous plate 13 is swung by the slanted porous plate 13 to pass through the stone removing port 12, the stone removing port communication passage 34, and the grain collecting passage 39. X'can be taken out as a good product.

  Further, in the conventional stone removing machine and stone removing method, after the supply of the grain to be sorted on the inclined perforated plate is finished (after the feeding process of the grain to be sorted is finished), the stone removing port is opened and the stone is removed. After discharging the grain and the foreign matter from the outlet (foreign matter discharging step), the collection passage shutter is opened to collect the grain through the grain collecting passage 39 (first grain collecting step), and thereafter, the stone is removed again. The operation of opening the mouth and discharging the residual grain (second grain collecting step) had to be performed, and four steps (operations) were required.

  On the other hand, according to the stone removing machine 10 and the stone removing method, the sorting operation is performed in a state where the rice to be sorted is supplied onto the inclined porous plate 13 while sucking the air A in the sorting chamber 15. Foreign matter discharge operation) can be performed (the supply process of the grain to be sorted and the foreign matter discharge process can be performed in parallel), after which the suction operation of the air A is stopped and the discharge path switching gate 40 is switched. The remaining rice discharging operation can be carried out, and the sorting operation and the collecting operation can be carried out in only two steps (operations), which simplifies the control operation.

  Further, in the conventional stone removing machine and the stone removing method, the stone removing shutter and the collection passage shutter are opened and closed. If the shutter is opened again, grains or foreign matter may be mixed in, or an error may occur during the closing operation of the stone removing shutter or the collection passage shutter to interrupt the stone removing operation. there were. On the other hand, according to the stone removing machine 10 and the stone removing method, since the shutter is not used, the grain and the foreign matter are not caught in the opening and closing portions when the shutter is closed, and the shutter is opened again. In this case, grain and foreign substances do not mix, and an error does not occur during the closing operation of the stone removing shutter or the collection passage shutter to interrupt the stone removing operation. Therefore, the reliability of the stone removing machine 10 and the stone removing method is improved. Is improved.

  Further, according to the above configuration and method, as shown in FIG. 8 and FIG. 9, the stone removing part air volume adjusting body 37 for adjusting the amount of air sucked into the sorting chamber 15 through the stone removing port 12 is provided. Therefore, the air sucked through the stone removing port 12 pushes the rice back away from the stone removing port 12, and the foreign matter is satisfactorily adjusted so that the amount of air is discharged from the stone removing port without any trouble. As a result, the grain recovery rate (so-called yield) can be improved, and the time for performing the stone discharging operation can be shortened, thus improving the work efficiency.

  Further, according to the above configuration and method, since the space below the inclined porous plate 13 is used as the grain recovery passage 39, the remaining rice is satisfactorily discharged through the grain recovery passage 39 provided below the inclined porous plate 13. can do. Further, the stone removing machine 10 can also have a relatively simple structure, which can reduce the manufacturing cost and improve the reliability. Further, as compared with the conventional case where the grain collecting passage is formed outside the side wall portion of the inclined porous plate, there is an advantage that the widthwise dimension can be suppressed.

  Further, according to the above configuration, as shown in FIGS. 5 and 8, since the space below the inclined porous plate 13 is used as the grain collection passage 39, the outside air is introduced into the left and right side plate portions 16a of the swing housing 16. The opening 35 is provided so that the outside air is introduced from both sides. Therefore, when the inflow equalizer 36 such as the punching plate is not provided as described above, when air is introduced into the inclined porous plate 13, the inclined porous plate 13 near the outside air introduction opening 35 is provided. A large amount of air easily flows in from the vicinity of both sides. However, as described above, the inflow-amount equalizing body 36 made of a plate-like body such as a punching plate is arranged below the inclined porous plate 13. As a result, the inflow amount of air into the inclined porous plate 13 is less likely to be biased to a specific region (for example, a portion near both sides of the inclined porous plate 13 near the opening 35 for introducing the outside air), and the inclined porous plate 13 is moved upward. Air can be evenly flowed in, the grains on the inclined porous plate 13 can be lifted well, and good sorting work can be performed, which also improves the reliability of the stone removing machine 10 and the stone removing method. Can be improved.

  Further, according to the above configuration, as shown in FIG. 5 and the like, since the suction opening 33 for sucking air in the sorting chamber 15 is formed so as to face the sorting chamber 15 from above, the inclined porous plate. Air is sucked upward from 13 so that the grain can be favorably floated on the inclined perforated plate 13.

  Further, as described above, the partition wall portion 29 is provided for blocking the stone outlet communication passage 34 communicating with the stone outlet 12 so as not to communicate with the outside air introduction space below the inclined porous plate 13. As a result, it is possible to prevent the air that has entered the stone outlet communication passage 34 from flowing into the outside air introduction space below the inclined porous plate 13, and it is possible to secure the amount of air flowing to the stone outlet 12 and improve the reliability. Is improved.

  Further, according to the above configuration, as shown in FIGS. 11 and 12, the discharge path switching gate for switching the discharge path from the stone removing port 12 to the foreign matter discharging section (foreign matter collecting box 38) side or the grain collecting passage 39 side. Since the 40 is provided, by switching the posture of the discharge path switching gate 40, foreign substances such as stones discharged from the stone removing port 12 are discharged to the foreign substance discharging unit (foreign substance collecting box 38) side, or the stone removing process is performed. The grain discharged from the mouth 12 can be discharged to the grain collection passage 39 side.

  Further, in the above description, the case where the gate switching motor 46, the connecting wire 48, and the like are used as the gate switching mechanism 45 that drives the discharge path switching gate 40, and thereby the posture of the discharge path switching gate 40 is improved. You can switch. However, the present invention is not limited to this, and as shown in FIGS. 14 and 15, the posture of the discharge path switching gate 40 ′ may be switched using a solenoid 61 or the like. In this case, it is preferable to devise a structure for blocking the stone outlet communication passage 34 communicating with the stone outlet 12 so as not to communicate with the outside air introduction space below the inclined porous plate 13.

  Further, according to the above configuration, as shown in FIG. 8 and FIG. 13, air sucked into the sorting chamber 15 through the grain extraction opening 57 when the amount of grain extracted decreases in the grain extraction opening 57. An opening/closing lid 58 for reducing the amount of With this configuration, when the amount of grains taken out has decreased due to the end of grain supply, the opening/closing lid 58 provided at the grain taking-out opening 57 is closed and sucked into the sorting chamber 15 through the grain taking-out opening 57. The amount of air A that is removed is reduced. As a result, air is sucked into the sorting chamber 15 through the grain extraction opening 57, and the amount of air sucked through the stone removing port 12 is reduced, so that the grain in the sorting chamber 15 flows into the stone removing port 12. It is possible to prevent becoming difficult to be regulated. Also by this, the reliability as the stone removing machine 10 and the stone removing method can be improved.

  Moreover, according to the said structure, as shown in FIG. 10, the inclined porous plate 13 is arrange|positioned so that it can be taken out outside. With this configuration, when performing maintenance work such as maintenance of the tilted porous plate 13 such that some of the ventilation holes 13a may be clogged, the tilted porous plate 13 can be taken out to the outside for easy maintenance. Can perform maintenance work. Further, according to the above configuration, the inflow amount equalizing body 36 such as the punching plate is also arranged so as to be freely taken out to the outside, so that the inflow amount equalizing body 36 can be taken out to the outside as needed to easily perform maintenance or the like. Maintenance work can be performed.

  Moreover, according to the said structure, since the inclined porous plate 13 is arrange|positioned so that it can be taken out from the stone removal port 12 side toward the grain extraction port 11 side direction outside, the shape of the inclined porous plate 13 and the stone removal process. The inclined perforated plate 13 and the like can be satisfactorily taken out without being related to the gate switching mechanism 45 or the like that drives the discharge path switching gate 40 that is a guide unit that guides foreign matters and grains discharged from the mouth 12, It becomes easy to perform maintenance work for the inclined porous plate 13 and the like. Note that the present invention is not limited to this, and the inclined porous plate 13 and the inflow-amount equalizing body 36 may be arranged so that they can be taken out from the side (sideways). It is required to devise the structure of the gate switching mechanism 45 that drives the path switching gate 40 depending on the case.

  In the above-mentioned embodiment, it is preferable that the inclined porous plate 13 has the ventilation holes 13a and the protrusions 13b. , Foreign matter such as stones can be favorably moved to the stone removal port 12 side, and the specific gravity sorting operation can be favorably performed. However, the invention is not limited to this, and a wire mesh shape may be used as the inclined porous plate 13.

  Moreover, in the said embodiment, the case where the grain used as the selection target in the stone removing machine 10 is rice was described. However, the object to be sorted by the stone removing machine 10 is not limited to this, and not only rice but also wheat (wheat or barley) and other grains can be applied to the stone removing machine (foreign matter sorting). Machine) can be configured.

10 Stone removing machine 11 Grain outlet (rice outlet)
12 Stone removal port 13 Inclined porous plate 14 Grain (rice) supply passage 15 Sorting chamber 16 Swing housing 17 Parallel link 29 Partition wall portion 30 Air suction device 32 Suction cylinder portion 33 Suction opening portion 34 Stone removal passage communication passage 35 Outside air introduction opening 36 Inflow rate equalizing body (punching plate, plate-like body)
37 Stone removal part air volume adjustment body 38 Foreign matter collection box (foreign matter discharge part)
39 Grain (remaining rice) collection passage 40 Discharge route switching gate 45 Gate switching mechanism 55 Grain (rice) extraction communication passage 57 Grain (rice) extraction opening (good product outlet)
58 Open/close lid

Claims (13)

An inclined perforated plate having air permeability that is swingably supported in an inclined posture in which the grain outlet side for taking out grains such as rice is low, and the stone outlet side for discharging foreign matters such as stones is high. A stone removing machine provided with a grain supply passage for supplying grains to be sorted onto a slanted perforated plate, and a sorting chamber formed on the slanted perforated plate,
An air suction device for sucking air in the sorting chamber is provided so that air is introduced into the sorting chamber from below through the inclined porous plate.
By sucking the air in the sorting chamber with the air suction device, the air is sucked into the sorting chamber even through the stone removing port, and the inflow of the grain to be sorted in the sorting chamber to the stone removing port is regulated. A stone removing machine characterized by being.   The stone removing machine according to claim 1, wherein a suction opening for sucking air in the sorting chamber is formed so as to face the sorting chamber from above.   The stone removing machine according to claim 1 or 2, further comprising a stone removing unit air flow rate adjusting body that adjusts an amount of air sucked into the sorting chamber through the stone removing port.   The stone removing machine according to any one of claims 1 to 3, wherein air is introduced laterally into a space below the inclined porous plate.   5. An inflow amount equalizer for equalizing the inflow amount of air into the inclined porous plate so as not to be biased to a specific region is attached below the inclined porous plate. The stone removing machine according to item 1.   A stone outlet communication passage communicating with the stone outlet and a discharge passage switching gate connected to the stone outlet for switching the discharge passage to the foreign matter discharge portion side or the grain collection passage side for collecting grain are provided. The stone removing machine according to any one of claims 1 to 5.   7. A partition wall portion for blocking the stone outlet communication passage communicating with the stone outlet so as not to communicate with the outside air introducing space below the inclined porous plate, and the partition wall portion is provided. The stone removing machine described in paragraph.   The stone removing machine according to any one of claims 1 to 7, wherein a grain recovery passage for recovering grain remaining on the inclined porous plate is provided below the inclined porous plate.   An opening/closing lid that reduces the amount of air that is sucked into the sorting chamber through the grain extraction opening when the amount of grain output decreases in the grain extraction opening that communicates with the grain extraction outlet and takes out the selected grain to the outside. The stone removing machine according to claim 1, wherein the stone removing machine is provided.   The stone removing machine according to any one of claims 1 to 9, wherein the inclined porous plate is arranged so as to be taken out from the stone removing side toward the grain removing side. A control unit for controlling the air suction device is provided, or connected to a stone removing machine,
The control unit operates the air suction device during the sorting operation for sorting the grain and the foreign matter, while stopping the air suction device during the grain collection for collecting the grain remaining on the inclined perforated plate from the stone removing port. The stone removing machine according to any one of claims 1 to 10. The inclined porous plate having air permeability is supported so as to be swingable in an inclined posture in which the grain outlet side is low and the stone outlet side for discharging foreign matters such as stones is high.
From below through the inclined perforated plate, while sucking with an air suction device so that air is introduced into the sorting chamber provided on the inclined perforated plate,
Air is sucked by the air suction device so that air is introduced into the sorting chamber even through the stone removal port,
A stone removing method, characterized in that the air introduced into the sorting chamber through the stone removing port regulates that the grain to be sorted supplied into the sorting chamber flows into the stone removing port. When ejecting foreign matter through the stone removing port, while swinging the inclined porous plate, air is sucked by the air suction device so that the air also flows into the sorting chamber through the stone removing port.
After foreign matter is discharged through the stone removal port, the suction of air by the air suction device is stopped while rocking the inclined porous plate, and the grain remaining on the inclined porous plate is collected through the stone removal port. The stone removing method according to claim 12.

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