JP2002239473A - Granular body inspection device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a granular material inspection device capable of more reliably separating a defective product from a normal product. SOLUTION: Among the granular material groups which are transported along a predetermined transport path, a defective granular material and foreign matter mixed in the granular material group are detected as defective, and air is ejected to the defective. An air blowing device 6 that separates them into different paths by air transport is provided, and a flexible sheet-like and porous anti-jumping body 33 is air-transported by the air blowing device 6. The upper part is supported by the fixing part 34 and the lower part is provided in a hanging position in which the lower part is in a free state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer means for transferring a group of particles along a predetermined transfer path, and mixing defective particles and a group of particles among the group of particles transferred by the transfer means. Defect detection means for detecting a foreign substance to be defective as a defective object, and among the granular material groups transferred along the scheduled transfer path, by ejecting air to the defective or the normal granular material to carry the air, The present invention relates to a granular material inspection apparatus provided with a separation means for separating them into different paths.

[0002]

2. Description of the Related Art In the prior art granular material inspection apparatus, there has conventionally been, for example, one disclosed in Japanese Patent Application Laid-Open No. 2-2980. That is, a transfer means for transferring a rice grain group as an example of the granular material group along a predetermined transfer path so as to flow down from a lower portion of the supply tank along a downflow gutter is configured, and for the rice grain group guided down, A light-receiving sensor detects the amount of light radiated by a fluorescent lamp as an irradiating means and transmitted through the group of particulates, and based on the detection value, detects defective particulates and foreign matter mixed in the group of particulates based on the defective value. This constitutes a failure detecting means for detecting the failure. Further, based on the detection result of the defect detecting means, air is blown out to the defective one of the group of granular materials transferred along the predetermined transfer path to separate the defective one into a path different from the normal one. However, in the case where air is ejected to the defective object to separate the defective object into a different path from the normal object, a partition surrounding the air ejection point is provided to receive and guide the defective article conveyed by the air. It has become. It should be noted that normal objects that are not conveyed by air flow down as they are, and are guided down through the lower normal object collection cylinder. Defective items that are conveyed by air are conveyed by air and flow paths of normal objects , And is collected laterally by a defective product collection unit formed on the outer peripheral portion of the normal product collection cylinder. The partition is made of a general metal material or a hard synthetic resin, and is formed on an inclined surface such that the air-conveyed granular material is guided toward a lower side, that is, a defective product collection point. Configuration.

[0003]

In the above-mentioned conventional structure, the defective product separated by air conveyance comes into contact with the partition wall formed on the inclined surface and is guided downward. Many of the defectives separated by air conveyance will be collected at the defectives collection section without entering the normal-collection cylinder, but still have the following aspects. There was room for improvement.

[0004] That is, a granular material such as rice grains has a high repulsive force and often jumps greatly when it collides with a hard wall surface. For example, in the case of rice grains, the cross section becomes substantially elliptical. Because of its external shape, it does not always bounce in a fixed direction when it collides with a wall surface, and may bounce in all directions in a diffusely reflected state. Then, in the configuration of the related art, in the case where the defective matter conveyed by air is brought into contact with the partition wall and guided as described above, the defective matter is not always always properly guided to the lower defective collecting section, When the defective articles conveyed by air collide with the partition walls, they are irregularly reflected, mixed into a group of normal articles guided downward, and may enter the cylinder section for collecting normal articles.
In addition, even if it is not a granular material having an external shape such as rice grains as described above, but a granular material having a constant reflection direction, the defective air-conveyed abuts against the upper side edge portion of the partition wall to cause irregular reflection. It is also conceivable that there is a possibility of accidentally entering the cylinder for recovering normal objects. The proportion of defectives mixed with normals in this way is, for example, about several percent. However, it is not preferable that defectives be mixed into normals separated by this granular material inspection apparatus. In particular, it is not preferable that defectives are mixed with normal ones in granular materials such as rice grains which are sold as food. Therefore, improvement of the above-mentioned problems has been desired.

The present invention has been made in view of such a point, and an object of the present invention is to solve the above-mentioned disadvantages,
It is an object of the present invention to provide a granular material inspection device that can more reliably separate a defective product from a normal product.

[0006]

According to the first aspect of the present invention, there is provided a transfer means for transferring a group of particulates along a predetermined transfer path, and a defective one of the group of particles transferred by the transfer means. A defect detecting means for detecting a foreign substance mixed in the group of particulates as a defective substance; and, by blowing air to the defective substance or the normal granular substance among the group of granular substances transported along the scheduled transport path, air In a granular material inspection apparatus provided with a separation unit that separates them into different paths by being conveyed, a flexible sheet-shaped and porous jump-prevention body is formed by air by the separation unit. The upper end portion is supported by a fixed portion, and the lower side is provided in a hanging posture in which the lower side is in a free state at a position for receiving the conveyed defective or the normal granular material. And butterflies.

[0007] Out of the group of granules transferred along the predetermined transfer path, air is blown out to the defective or normal granules detected by the defect detecting means, and is conveyed by air, so that the defectives and normal granules are conveyed. The granular material is separated into different paths. At this time, the granular material or the like conveyed by air is received by the jump-preventing body. The anti-bounce body has a flexible and free-hanging posture, so that even if the air-conveyed granular material or the like comes in contact with the body, the momentum due to the air conveyance is extinguished and the body largely bounces. It is suppressed and falls downward as it is. In addition, since the air ejected to convey the air passes through the holes of the anti-jump body formed in a porous shape, the anti-jump body can be prevented from swaying due to the air. Can be avoided beforehand.

The flexible sheet may be made of, for example, synthetic fibers made of synthetic resin such as nylon, natural fibers such as hemp or cotton, or rubber made of sheet and porous. What was formed in the shape can be used. In addition, even if it is formed of, for example, a porous plate as the jumping prevention member, for example,
In the case of using a metal material or a hard synthetic resin material, there is a risk that the granular material or the like conveyed by air will jump greatly if it comes into contact with the material vigorously. It is also conceivable to form a rubber material into a plate shape as a jump-preventing body, but even in this case,
If a granular material such as rice grains vigorously comes into contact, there is a possibility that the granular material will jump greatly. However, by using the sheet-shaped and porous jump-preventing body having flexibility as described above, such jumping can be accurately suppressed.

[0009] Therefore, by forming the anti-jump body with a rational configuration, it is possible to accurately prevent the air-conveyed granules and the like from jumping greatly, and to mix the defective and normal granules. Thus, it is possible to provide a granular material inspection apparatus capable of more reliably separating a defective product from a normal product.

According to a second aspect of the present invention, in the first aspect, the transfer means is configured to transfer the granular material group in a state where the detection points by the defect detection means are arranged in a single layer and in a state of being arranged in a plurality of rows in the width direction. The defect detecting means is configured to identify and detect the position of the defective substance in the group of granular materials transferred along the planned transfer path in the width direction of the planned transfer path, The separation unit is configured to perform the air conveyance by specifying a position in the lateral width direction where the air is ejected, based on a detection result of the defect detection unit, and the jump preventing body is provided in the transfer unit. It is characterized in that it is formed to have a wide width corresponding to the entire width in the lateral width direction.

The granular material group is transported by the transporting means in a state where the locations detected by the defect detecting means are in a single layer and arranged in a plurality of rows in the width direction. Then, when separating the defective object and the normal granular material into different paths by air conveyance, the air-conveyed granules and the like are received by the jump-prevention body. Defective objects are specified and detected in the width direction of the planned transfer path, and the separating unit specifies the position in the horizontal width direction where air is ejected and performs air conveyance. That is, air transport is performed in a state where the positions in the horizontal width direction are different among the granular material groups transported in a single layer state and in a plurality of rows arranged in the horizontal width direction. And since the anti-jumping body is formed to have a wide width corresponding to the entire width in the lateral width direction, the air-conveyed granular material and the like can be transported from any position in the horizontal width direction to the anti-jumping body. As a result, it is possible to obtain the means suitable for carrying out claim 1.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a granular material inspection apparatus according to the present invention will be described in which a granular material group composed of a group of rice grains such as brown rice and polished rice is transported along a predetermined transport path as an inspection object.
A case of detecting and removing a defective object will be described with reference to the drawings.

As shown in FIGS. 1 to 3 (note that FIG. 3 is an explanatory diagram of the operation for detecting and removing a defective object, and therefore, the arrangement of the device configuration is different from that of FIGS. 1 and 2). A plate-like shooter 1 having a flat guide surface formed over the entire width in the width direction is installed at a predetermined angle (for example, 60 degrees) with respect to a horizontal plane, and is provided on the upper side of the shooter 1. The rice grain group k conveyed and supplied from the storage tank 7 by the feeder 9 is guided downward while spreading horizontally on the upper surface of the chute 1. That is, the flow path from the upper surface of the shooter 1 and the lower end thereof forms a scheduled transfer path, and the shooter 1 forms the transfer means H. Here, since the purpose is to transfer the particles in a single layer state, even if the particles partially overlap depending on the flow state, they are included in the concept of the single layer state.

In the storage tank 7, an inspection object supplied from an external rice mill or the like is stored. The tank 7 is formed in a tapered cylindrical shape toward the lower end, and the supply amount of the rice grains k dropped from the tank 7 onto the feeder 9 to the shooter 1 is determined by the feeder 9.
Is adjusted by changing the transport speed of the rice grain group k due to the vibration of.

Rice grains k flowing down from the lower end of chute 1
Is present in a wide state, the long detection position J is the rice grain group k
The linear light sources 4A and 4B such as fluorescent lamps which illuminate the entire width of the rice grain group k in the horizontal direction at the detection position J and the illumination light from the linear light sources 4A and 4B A reflection line sensor 5B for receiving the light reflected by the rice grain group k at the position J is provided. On the other hand, the linear light sources 4A, 4B
On the side opposite to the installation position (right side in the figure), the linear light source 4
A transmission line sensor 5A is provided for receiving the transmitted light of the illumination light from A and 4B transmitted through the rice grain group k at the detection position J.

Here, the linear light sources 4A and 4B are
The rice grain group k is illuminated from a plurality of different oblique directions while being inclined with respect to the light receiving direction of the transmission line sensor 5A.
There are two linear light sources 4A and 4B. That is, a lower light source 4A that illuminates the detection position J from obliquely below and an upper light source 4B that illuminates the detection position J from obliquely above are provided. The two light sources 4A and 4B are respectively provided with respect to the detection position J. It is held by the frame 22 while maintaining the illumination angle. Since the detection position J is illuminated from two directions by changing the illumination angle of the illumination light, even if the rice grain k is shifted from the normal position in the horizontal direction, the detection position J is preferably illuminated as uniformly as possible. You can do it.

On the same side as the side where the linear light sources 4A and 4B are provided, light having the same or substantially the same brightness as the transmitted light from the normal product (normal rice) in the rice grain group k is transmitted.
A transmitted light reflector 8A that reflects toward A is provided, and the linear light sources 4A and 4B are arranged to illuminate the transmitted light reflector 8A. In addition, the light reflecting plate for transmission 8A
Is a plate portion 22a connected to the light source supporting frame 22.
And a white plate whose surface is formed white by printing or the like. Then, the linear light sources 4A and 4B, the reflection line sensor 5B, and the transmitted light reflection plate 8A are stored in one storage section 13B.

On the same side as the side on which the transmission line sensor 5A is provided, light having the same or substantially the same brightness as the light reflected from the normal product (normal rice) in the rice grain group k is reflected.
A reflection plate 8B for reflected light that reflects toward B is provided. The transmission line sensor 5A and the reflected light reflection plate 8B are housed in the other housing 13A.
In addition, both the storage portions 13A and 13B are formed as an integral box body having a common side plate.

Each of the storage sections 13A and 13B is provided with a light transmitting window 14A and 14B made of a plate-shaped transparent glass on the side facing the detection position J. Here, the two windows 14A and 14B are arranged in a state (V-shape) in which the distance from each other decreases toward the lower side. The reflecting plate 8B has a region 8a having the same reflectance as that of the rice grains in a longitudinal shape corresponding to the entire width of the rice grain group k illuminated by the linear light sources 4A and 4B. Is formed as a coating film by printing or the like on the inner surface of the window portion 14A so as to form black regions 8b on both sides of the region 8a.

As shown in FIG. 5, the two line sensors 5
A and 5B are provided with a plurality of light receiving units 5a from which light receiving information can be separately taken out by setting a range p (for example, about 1/10 of the size of rice grain k) smaller than the size of rice grain k as each light receiving target range. The detection positions J are juxtaposed along the longitudinal direction, and the entire width of the rice grain group k in the width direction is set as the light receiving range. Specifically, a monochrome type C in which light receiving elements as a plurality of light receiving portions 5a are arranged in a straight line.
It comprises a CD sensor 50 and an optical system 51 for forming an image of the rice grain group k at the detection position J on each light receiving element of the CCD sensor. And both line sensors 5A, 5
B, from one end of the long detection position J to the other end, for example, in FIG. 3, from the left end to the right end of the long detection position J, from each light receiving portion 5a Light reception information is sequentially extracted.

A different path from a defective object such as a colored particle or a foreign substance detected based on the light receiving information of the two line sensors 5 and 5B at the detection position J to a normal object is provided downstream from the detection position J in the downstream direction. An air blowing device 6 for blowing air to the defective object g determined based on the light receiving information at the detection position J to separate the defective object from the normal moving direction is provided. Device 6
Moves the plurality of injection nozzles 6a to the above-mentioned moving fall path IK.
Are arranged side by side in a state corresponding to each of the plurality of sections divided into a plurality of sections with a predetermined width, and the ejection nozzle 6a of the section in which the defective g is present is operated. Accordingly, the air blowing device 6 separates the defective particles g into different paths by ejecting air to the defectives g and conveying the air among the particles (rice particles k) transferred along the predetermined transfer path. Constituting a separating means.

Then, of the rice grains k flowing down from the lower end of the shooter 1, normal rice grains k which are recovered without being blown by the air blowing device 6 and are recovered as normal rice grains k. A receiving portion 2B and a receiving portion for collecting defective rice such as colored rice and cracked rice separated from the normal flow of the rice grains k by blowing air and defective foreign matters such as stones and glass fragments. A mouth portion 3B is provided, and a reception portion 2B for good rice is formed in a tubular shape elongated in the width direction, and a reception portion for a defective product is formed so as to surround the periphery of the reception portion 2B for good rice. 3B is formed.

As shown in FIG. 1, vertical frames F2, F3 and F4, which are erected on a bottom plate F1 having a leg F0, are
5, F6, and F7 are linked to form a machine frame. An operation console 21 for displaying and inputting information is installed in the upper oblique portion of the front vertical frame F4, and a vibration generator 9A for the feeder 9 is installed on the horizontal frame F5. or,
The box-shaped storage sections 13A and 13B are supported by the vertical frame F4 on the front side and the vertical frame F3 on the rear side, and the chute 1 is supported by the horizontal frame F on the upper side.
The lower part 6 is supported by the storage part 13B. A cover 12 that covers the outer surface of the apparatus is attached to the machine frame, and an upper cover 12A of the front cover 12 is configured to be openable and closable in a vertical direction. When the upper cover 12A is lifted, inspection of the inside of the apparatus can be performed. It has a configuration that can be performed. A power supply box 30 is provided on the bottom plate F1, and a control box 31 is provided on the horizontal frame F7. or,
A plurality of ejection nozzles 6 in the air blowing device 6
The air manifold 16 for branching and supplying air to the air manifold a is supported by the receiving portion 3B, and the air manifold 1
A regulator 15 is provided on the bottom plate F1 to supply air at a stable pressure to the tube 6 via a pipe 18. The regulator 15 is configured to be supplied with air from a compressor (not shown). I have.

The control structure will be described. As shown in FIG. 4, a control device 10 using a microcomputer is provided. The control device 10 includes image signals from both line sensors 5A and 5B and operation from a console 21. Information has been entered. On the other hand, the control device 10 intermittently supplies a drive signal to the display unit of the console 21, a drive signal to the lighting circuit 19 of the linear light sources 4A and 4B, and supply of each air from the air manifold 16 to each ejection nozzle 6a. A drive signal for each of the control valves 11 and a drive signal for the feeder vibration generator 9A are output.

Then, using the control device 10, based on the received light information of each of the line sensors 5A and 5B, defective rice grains k transferred along the planned transfer path are removed from the planned transfer path. A defect detection unit 100 that specifies and detects a position in the width direction is configured. That is, rice grain group k
Based on the light reception information of the transmission line sensor 5A that receives the transmitted light from the transmission line and the reflection light from the transmitted light reflection plate 8A, the control device 10 determines that the amount of the received light is transmitted from the normal one in the rice grain group k. A reflection line sensor that detects the presence of a defective object at a position outside the proper light amount range for light and receives reflected light from the rice grain group k and reflected light from the reflected light reflecting plate 8B. Based on the received light information of 5B, it is configured to determine that a defective object exists at a position where the amount of received light is out of an appropriate light amount range for reflected light from a normal object in the rice grain group k.

In the case of transmitted light, as shown in the output waveform of the transmitted light line sensor 5A in FIG. 6, the output voltage corresponding to the amount of light received by each light receiving section 5a is within the appropriate light amount range ΔEt for the rice grain group k. In this case, the presence of a normal rice grain is determined, and when the rice grain is out of the set appropriate range ΔEt, the defective rice grain or the presence of a foreign substance is determined. Here, the appropriate light amount range ΔEt for transmitted light
Is set in a range of a predetermined upper and lower width across an output voltage level e0 for standard transmitted light from normal rice grains.

When the light amount is smaller than the proper light amount range ΔEt, the presence of defective rice grains, foreign matter, etc. (for example, black stones) having a transmittance lower than that of normal rice particles is determined. If it is larger, the presence of a light-side defective rice grain k or foreign matter having a transmittance higher than that of normal rice grain k is determined. As an example of the defective rice grain k or foreign matter on the light side, a thin colored transparent glass piece becomes a foreign matter having a transmittance higher than that of the normal rice grain k, and the normal rice grain k is "sticky rice". In this case, the "rice glutinous rice" becomes a defective rice grain k having a higher transmittance than the normal rice grain k.

FIG. 6 shows that the output voltage (light reception amount) of the light receiving portion 5a is determined by the position where a part of the rice grain k is partially colored, the position of a black stone or the like (indicated by e1), and the cracked portion of the body. At the existing position (indicated by e2), if there is a foreign substance or the like which is located below the appropriate light amount range ΔEt and has a transmittance higher than that of normal rice grains, the appropriate position is determined as indicated by the position e4. The state where it is located above the light amount range ΔEt is illustrated.

On the other hand, in the case of the reflected light, as shown in the output waveform of the reflected light line sensor 5B in FIG.
When it is within the range, the presence of normal rice grains is determined, and when it is out of the appropriate light amount range ΔEh, defective rice grains or the presence of foreign matter is determined. Here, the appropriate light amount range ΔEh for the reflected light is the output voltage level e for the standard reflected light from normal rice grains.
It is set in a range of a predetermined width up and down with respect to 0 ′.

FIG. 7 shows that, at a position where a part of the rice grain k has a colored portion (indicated by e1 ') and a position where a cracked portion exists (indicated by e2'), the rice grain k is below the appropriate light amount range ΔEh. Illustrates a state where the light is out of the proper light amount range ΔEh as shown at a position e3 ′ by strong direct reflection light from the foreign matter when a foreign matter such as a glass piece exists. are doing. Although not shown, the reflectance of a black stone or the like is very small, so that the waveform deviates greatly from the appropriate light amount range ΔEh downward.

When the presence of the defective g in the rice grain group k transferred to the detection position J by the line sensors 5A and 5B is determined based on the defect detection information, As the transfer time from the detection position J to the air ejection position by the ejection nozzle 6a in the air blowing device 6 elapses, the defective objects g flowing down are ejected from the ejection nozzles 6a corresponding to the position. The air is blown to separate the rice from the path of normal rice grains (see FIG. 3).

The inspection apparatus is provided with a jump prevention member 33 for receiving the defective object conveyed by the air blowing device 6.
The anti-jumping body 33 is formed in a flexible sheet-like and porous shape, and has a top end supported by a fixed portion at a position for receiving the defective object g conveyed by the air blowing device 6 by air. The lower side is provided in a hanging state in which the lower side is in a free state. That is,
As shown in FIG. 8 and FIG.
It consists of a flexible sheet-like and porous net-like portion 33a made of a synthetic fiber made of nylon resin, and a reinforcing cloth 33b reinforced in a state of being woven over the entire outer peripheral portion of the net-like portion 33a, It is provided in a wide width corresponding to the entire width in the lateral width direction of the planned transfer path. As shown in FIGS. 1 and 2, the defective object is located on the lower side in the air ejection direction than the position where the defective object is subjected to the air ejection operation, and is located before the peripheral wall surface of the defective object receiving portion 3 </ b> B. At the side portions, the upper side is fixed between a frame 34 as a fixing portion provided on the upper side of the receiving portion 3B for defectives and a backing plate 35 bolted to the frame 34. It is provided so that the lower side is in a hanging posture in which it is in a free state.

The jump preventing body 33 includes a mesh portion 33a.
A large number of holes 33c are set to have a size substantially equal to the size of the rice grains, so that the jetting air at the time of air conveyance easily passes therethrough so as to prevent the anti-jump body 33 from swinging. For example, the pitch a between the centers of the holes 33c in the vertical direction and the pitch b in the horizontal direction are each about 5 m.
m. Note that the size of the hole 33c is an example, and is not limited to such a size.

[Other Embodiments] Hereinafter, other embodiments will be listed.

(1) In the above-described embodiment, the jump-preventing body is exemplified by a synthetic fiber made of a nylon resin. However, the present invention is not limited to such a structure, and a synthetic fiber other than nylon may be used. In addition, natural fibers such as hemp or cotton may be used, or artificial rubber or natural rubber may be formed into a sheet and porous shape. What is necessary is just to have.

(2) In the above-described embodiment, as the separating means, the defective granular material of the transported granular material group and the foreign matter mixed in the granular material group, that is, the defective material, are conveyed by air. However, the present invention is not limited to such a configuration, and a configuration may be adopted in which normal granules in the conveyed granules are conveyed by air. For example, in the case of performing a re-inspection as an inspection target on a granular material group that has been selected and collected as defective after performing the inspection process, the proportion of normal grains is small. Should be inspected.

(3) In the above embodiment, the case where the granular material group to be inspected is the rice particle group k such as brown rice is exemplified. However, the present invention is not limited thereto. The present invention can also be applied to the case of inspecting the presence or absence of foreign matter.

(4) In the above embodiment, the planned transfer path is constituted by the plane shooter in the oblique posture and the flow-down path from the lower end thereof. In addition, for example, the granular bodies are transferred in a single line. A path in which a plurality of such gutter-like paths are arranged in the lateral direction may be used. Further, the present invention is not limited to the configuration in which the granular material groups are transported in a plurality of rows in the lateral width direction, but may be a configuration in which the granular material groups are sequentially transported in a single row.

(5) In the above embodiment, the defective object detecting means is configured to detect the defective object in the granular material group by optical means, but may be other than optical means.

[Brief description of the drawings]

FIG. 1 is an overall side view of a granular material inspection apparatus.

FIG. 2 is a side view of the main part.

FIG. 3 is a perspective view of the main part.

FIG. 4 is a block diagram of a control configuration.

FIG. 5 is a diagram showing a light receiving range of a line sensor.

FIG. 6 is an output waveform diagram of a transmitted light line sensor.

FIG. 7 is an output waveform diagram of a line sensor for reflected light.

FIG. 8 is an overall front view of the anti-jump body.

FIG. 9 is a partially enlarged front view of the anti-jump body.

[Explanation of symbols]

 6 separation means 33 anti-jump body 34 fixing part 100 failure detection means H transfer means

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masahiko Shimano 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Works (72) Inventor Naoto Ikeda 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house F-term (reference) 3F079 AC13 AC15 BA06 CA32 CA44 CB25 CB32 CB33 CB34 CB35 CB36 CC03 DA07

Claims (2)

[Claims] 1. A transfer means for transferring a group of granular materials along a predetermined transfer path, and a defective one of the group of granular materials transferred by the transfer unit and a foreign substance mixed in the group of granular materials as a defective one. Defect detection means for detecting, of the granular material group transferred along the scheduled transfer path,
A particle inspection apparatus provided with separation means for blowing air to the defective or normal particles to convey the air and separating them into different paths. And, at the place where the splash preventing body formed in a porous shape receives the defective or the normal granular material conveyed by the separating means, the upper end portion is supported by the fixed portion and the lower side is free. A granular material inspection device provided in a hanging posture. 2. The method according to claim 1, wherein the transferring unit is configured to transfer the group of particulates in a state where a plurality of rows of the particles are detected by the defect detecting unit and are arranged in a plurality of rows in the width direction. The method is configured to specify and detect a position in the width direction of the planned transfer path of the defective object in the group of granular materials transferred along the transfer path, and wherein the separation unit detects the defective unit. Based on the result, it is configured to specify the position in the lateral width direction where the air is to be ejected and to perform the air conveyance, wherein the jump preventing body has a wide width corresponding to the entire width in the lateral width direction in the transfer means. The granular material inspection device according to claim 1, wherein the granular material inspection device is formed.