JP2011025134A - Object sorter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an object sorter which can sort out an object correctly. <P>SOLUTION: This object sorter as a vegetable/fruit selector comprises the following components: a first conveyor (a first carrier part) which conveys and sorts out tomatoes (objects) C; a position detecting means which optically detects the position of the tomato C to be conveyed; a grade measuring means which measures the grade of the tomato C; a plurality of sending belts 13 which are installed on the first conveyor and at desired intervals "d" in a conveyance direction, and send out the tomato C almost in an orthogonal direction with the first conveyor at the desired position; and a control means which instructs the sending belt 13 to send out the tomato C, according to the position of the tomato C detected by the position detecting means and the grade of the tomato C measured by the grade measuring means. In addition, a marker W for detecting the position of the tomato C by the position detecting means is put on the sending belt 13, and the color of the marker W can be clearly discerned. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes a first transport body that transports and sorts an object, a position detection unit that optically detects the position of the transported object, a grade measurement unit that measures the grade of the object, and a first transport body And a plurality of delivery belts for delivering an object from the first conveyance body in a substantially orthogonal direction at a desired position, and the position of the object detected by the position detection means and the grade measurement means. The present invention relates to an object sorting device such as a fruit selector equipped with control means for instructing delivery of an object to a delivery belt based on the grade of the object.

  For example, as shown in Patent Document 1, a conventional fruit sorter (object sorting device) optically positions a transport conveyor (first transport body) that transports and sorts vegetables (objects) and the vegetables being transported. And a detection unit (position detection unit and grade measurement unit) for detecting the grade of the vegetable, and a separation process according to the grade measured by the detection unit, which is provided on the conveyance conveyor in the conveyance direction at regular intervals. In order to do so, a plurality of delivery belts are provided for delivering vegetables in a substantially orthogonal direction from the conveyor at a desired position. The delivery belt is provided on the conveyor, and each delivery belt is provided with an ID mark (marker) for detecting the position by the detection unit. Furthermore, a control means is provided for instructing the delivery belt to deliver the vegetables based on the position and grade of the vegetables detected by the detection unit.

  In order to sort vegetables with the fruit sorter configured in this way, the vegetables are placed on a delivery belt and conveyed. Then, the grade (size, sugar content, etc.) of the vegetable is measured by the detection unit, and the ID mark attached to the delivery belt is read. These two data are synthesized as information on one vegetable by the control means, and the control means instructs the transport conveyor to send the vegetables from the transport conveyor at a desired position. The vegetables sent out from the conveyor are, for example, boxed after being sent to another conveyor.

JP 2009-119344 A

In the fruit sorter configured in this way, the ID mark on the delivery belt is difficult to distinguish from the delivery belt, causing a reading error in the detection unit, and cannot properly separate the vegetables. there were.
SUMMARY OF THE INVENTION An object of the present invention is to provide an object sorting apparatus capable of accurately sorting an object.

For this reason, the invention according to claim 1 is a first transport body that transports and separates an object;
Position detecting means for optically detecting the position of the conveyed object;
Grade measuring means for measuring the grade of the object;
A plurality of delivery belts which are provided on the first transport body at regular intervals in the transport direction, and which feed the object from the first transport body in a substantially orthogonal direction at a desired position;
A control unit that instructs the sending belt to send out the object based on the position of the object detected by the position detecting unit and the grade of the object measured by the grade measuring unit;
A marker for detecting the position of the object by the position detecting means is provided on the delivery belt, and the color of the marker is highly visible.

  According to a second aspect of the present invention, in the object sorting device according to the first aspect, the difference between the lightness of the color of the marker and the lightness of the color of the surface of the delivery belt is large.

  According to a third aspect of the present invention, in the object sorting apparatus according to the first aspect, the width of the delivery belt is smaller than ½ of the major axis of the object.

  According to a fourth aspect of the present invention, in the object sorting device according to the first aspect of the present invention, the apparatus further comprises a protrusion for supporting the object from the rear when the object is sent onto the delivery belt.

  According to the first aspect of the present invention, the first transport body for transporting and sorting the object, the position detecting means for optically detecting the position of the transported object, and the grade measuring means for measuring the grade of the object. A plurality of delivery belts that are provided on the first transport body at regular intervals in the transport direction and feed the object from the first transport body in a substantially orthogonal direction at a desired position, and the position of the object detected by the position detection means And a control means for instructing delivery of the object to the delivery belt based on the grade of the object measured by the grade measurement means, in order to detect the position of the object by the position detection means on the delivery belt This marker is provided and the color of the marker is highly visible, so that the position detecting means can detect the marker accurately. For this reason, the control means can issue an accurate instruction to the first transport body, and an object sorting device capable of accurately sorting an object can be provided.

  According to the invention described in claim 2, since the difference between the lightness of the color of the marker and the lightness of the color of the surface of the delivery belt is large, the visibility of the marker is further improved.

  According to the invention described in claim 3, since the width of the delivery belt is smaller than 1/2 of the major axis of the object, the width of the delivery belt is too large with respect to the size of the object. The waste of the conveyance space can be avoided, and an object separation device that can efficiently convey an object can be provided.

  According to the fourth aspect of the present invention, since the projection is provided on the delivery belt for supporting the object from behind when the object is sent out, the inertial force of the object when the object is sent out from the delivery belt is provided. Even if you try to stay there, you can keep it from behind. Therefore, an object can be reliably sent out from the delivery belt.

It is a top view of the fruit selection machine as an object classification device of this invention. It is the partially expanded plan view. (A) is X sectional view taken on the line of FIG. 2, (b) is a Z arrow top view of (a). (A) is a top view inside a 1st conveyance conveyor, (b) is the Y arrow sectional drawing. (A)-(c) is for demonstrating the operation | movement which sorts a tomato with a fruit selection machine. It is a top view of another example of the object classification device of this invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a fruit selection machine that sorts tomatoes (objects) C by size (grade) as an example of the object sorting apparatus of the present invention. The fruit selection machine 1 includes a first conveyor (first transport body) 10 and second conveyors (second transport bodies) 14A, 14B, and 14C in a direction orthogonal to the transport direction J of the conveyor. The fruit selector 1 is divided into three zones, zone P, zone Q, and zone R, from the entry side to the exit side. Zone P is an area where the tomato C arrives from the farm on the first conveyor 10. The zone Q is an area for measuring the position information of the tomato C on the first conveyor 10 (which delivery belt 13 is placed on the first conveyor 10) and the size of the tomato C. The zone R is an area where the tomato C whose size is specified is sorted and sent from the first conveyor 10 to the second conveyors 14A (large size), 14B (medium size), and 14C (small size).

  The zone Q includes a position detection unit 11 and a grade measurement unit 12. The position detection means 11 optically reads the position information of the tomato C on the first conveyor 10 (where it is placed on the first conveyor 10) together with a white mark W to be described later. The grade measuring means 12 measures the size of tomato C optically. The position detecting means 11 includes a light that illuminates the first conveyor 10 from above, a dedicated camera, and the like. Further, the grade measuring means 12 includes another light that illuminates the first conveyor 10 from above and a dedicated camera. The information obtained by the grade measuring means 12 is transmitted to a control means (not shown) provided separately, in which the grade of tomato C is specified as large / medium / small, and obtained from the position detecting means 11. The position information of the tomato C on the first conveyor 10 is combined with the data of one tomato C. Based on this data, an instruction is sent to the first conveyor 10 as to which of the second conveyors 14A, 14B, and 14C the tomato C is sent out.

  In the zone R, a plurality of tomatoes C conveyed on the first conveyor 10 are sent from the first conveyor 10 to one of the second conveyors 14A, 14B, 14C based on an instruction from the control means.

  Next, the structure of the fruit selection machine 1 will be described in detail. The fruit selection machine 1 includes a first conveyor 10 that conveys and separates the tomato C, a position detection means 11 that detects the position of the tomato C being conveyed, a grade measuring means 12 that measures the size of the tomato C, and a tomato A delivery belt 13 for delivering C, a delivery roller unit 23 for receiving and conveying tomato C delivered from the delivery belt 13, and a plurality (three in this example) of second rollers further ahead of the delivery roller unit 23 Conveyors (second transport bodies) 14A, 14B, 14C, a drive unit that drives the first conveyor 10, gears, and the like are provided.

  As shown in FIG. 2, the delivery roller unit 23 is composed of four rows of rollers. The delivery roller unit 23 includes a plurality of plastic rollers 23b rotatably on a metal support shaft 23a. The roller 23b has a plurality of short divided rollers loosely fitted on the support shaft 23a. It is also slidable in the axial direction. Both ends of the support shaft 23 a are fixed to the frame of the feed roller unit 23. A wide belt is pressed against all the rollers 23b by the pressing roller below the rollers 23b. The wide belt is configured to rotate by a driving roller (not shown). That is, the roller 23b is rotated by the belt pressed from below. Magnets M1 are fixed to both ends of the support shaft 23a. Then, by attaching the magnet M2 having the same magnetic pole as that of the magnet M1 to the outside of the roller 23b closest to the magnet M1, the magnet M1 and the roller 23b to which the magnet M2 is attached repel each other and always have a certain distance or more. Can keep you. All the four rows of rollers 23b have this configuration. Magnets M1 and M2 are permanent magnets.

  Further, even if the roller 23b attached with the magnet M2 receives a certain force and approaches the magnet M1, the repulsive force of both magnets can be driven away from the roller 23b against the force.

  The first conveyor 10 includes a plurality of delivery belts 13. The delivery belt 13 is provided so that the delivery direction is orthogonal to the conveyance direction J of the first conveyor 10, and is provided at regular intervals d throughout the first conveyor 10. The two delivery belts 13 are attached to the unit base 25 as a set. The delivery belt 13 is composed of a pair of rollers 20a and 20b and a green belt 22 wound around them. The belt 22 is preferably made of a non-slip material (a material having a rough surface and a high frictional resistance). A rectangular parallelepiped protrusion 15 is fixed on the surface of the belt 22. It is desirable that the width of the protrusion 15 is approximately the same as the width of the belt 22 and the height of the protrusion 15 is approximately the same as the diameter of the cross section of the tomato C. Further, on the surface of the belt 22, a white line (mark W) and a black line (mark B) are provided in a straight line in the conveying direction of the first conveyor 10 on both sides at a certain distance from the protrusion 15. These marks W and marks B are formed by applying paint or the like.

  At this time, the white color of the mark W is highly visible in combination with the green color of the belt 22 that is the background color, and can be easily identified by the one detecting means 11 described later. The mark W is not limited to white, and may be any color that has high visibility in combination with green as the background color. In order to improve visibility, lightness, saturation, and hue (three attributes of color) are greatly affected in this order (lightness> saturation> hue). Therefore, increasing the brightness difference between the color of the mark W and the color of the belt 22 is the most effective for improving the visibility. Further, it is desirable that the width m of the mark W is about 1 cm and the length covers the entire width of the belt 22.

  The rollers 20a and 20b are rotatably supported by the rotation shafts 21a and 21b, respectively, and both ends of the rotation shafts 21a and 21b are fixed to the unit base 25. The rollers 20 a and 20 b and the rotation shafts 21 a and 21 b are provided for each belt 22. Accordingly, each delivery belt 13 can move independently.

  By the way, the width l of the delivery belt 13 is configured to be smaller than ½ of the long diameter L of the tomato C placed thereon. In addition, when the delivery belt 13 sends out the tomato C, a protrusion 15 that supports the tomato C is provided on the delivery belt 13. One tomato C is placed on a plurality (two in this example) of delivery belts 13.

  The second conveyors 14A, 14B, 14C are for receiving the tomatoes C sorted according to size and packing them for shipping. The upstream second conveyor is a continuous operation, and the downstream second conveyor is an intermittent operation that operates only when the tomato C is delivered. The second conveyors 14A, 14B, and 14C are configured by winding a wide rubber belt around two rollers. One of the two rollers is a driving roller and the other is a driven roller. The timing for intermittent operation is instructed by the control means.

  As shown in FIG. 3, a resin guide bar (round bar) 31 is provided on the back side of the delivery belt 13. Specifically, a round hole is formed in the center of the belt 22 in the width direction, and the guide rod 31 is passed through the round hole. An end portion of the guide bar 31 is fixed to a resin fixing plate 32. By fixing the fixing plate 32 to the back surface side of the belt 22, the belt 22 and the guide rod 31 are configured to move together. The guide bar 31 is long enough to reach guideways 40A and 40B described later. A long hole 25 </ b> A is formed in the lower plate of the unit base 25. The long hole 25 </ b> A is formed along the moving direction of the belt 22 and along the center line of the belt 22. The length of the long hole 25 </ b> A is set to a distance that the protrusion 15 moves when the delivery belt 13 sends out the tomato C or longer than that. And the guide rod 31 is loosely fitted in this long hole 25A.

  Endless chains 26 are provided along the transport direction J on both sides in the transport direction J of the first conveyor 10, and the unit base 25 is fixed on the endless chain 26. Specifically, a screw hole is formed in a bracket 27 provided in the endless chain 26, and a bolt 28 is passed therethrough and attached to the front and rear side surfaces in the transport direction J of the unit base 25.

  The endless chain 26 is configured to engage with gears respectively provided on both sides of the front and rear ends of the first conveyor 10. A drive shaft is attached to the pair of gears on the first conveyor 10 entrance side. These gears, drive sources, chains, etc. are covered with a case (not shown). In addition, inside the case, a plurality of unit bases 25 folded back at the terminal end of the first conveyor 10 are conveyed in an upside down direction toward the entry side of the first conveyor 10.

  In this example, two delivery belts 13 are attached to the unit base 25 as one unit, but the number of delivery belts 13 constituting one delivery belt unit is the number of gears at the front and rear ends of the first conveyor 10. Depends on the diameter. That is, if the gear diameter is large, the curvature that the delivery belt unit follows increases, so the number of delivery belts 13 per unit can be increased. If the gear diameter is small, the delivery belt unit follows. Therefore, the number of delivery belts 13 per unit is reduced.

  A delivery mechanism as shown in FIG. 4 is provided on the inner side (back side) of the first conveyor 10. This delivery mechanism is for operating the delivery belt 13 to deliver the tomato C toward the delivery roller unit 23. The delivery mechanism is provided inside the first conveyor 10 and immediately before each delivery roller unit 23. The delivery mechanism includes a drive pulley 44, a driven shaft 43, an auxiliary belt 42 wound around both of them, and the like. The drive pulley 44 is rotated by a motor (not shown). A direction switching plate 41 is provided in the vicinity of the driven shaft 43 so as to be movable up and down in the vertical direction. In the front-rear direction of the direction switching plate 41, guideways 40A and 40B are provided. The guide bar 31 moves in the guide ways 40A and 40B. The guideways 40A and 40B, the direction switching plate 41, the driven shaft 43, and the drive pulley 44 are provided on the instruction plate 45 in the case of the first conveyor 10.

  The direction switching plate 41 is for switching the direction of the guide bar 31 that has moved in the guide way 40A along the transport direction J of the first conveyor 10 between the a direction and the b direction. When the direction switching plate 41 rises to a predetermined height, the guide bar 31 comes into contact with the direction switching plate 41 and is guided in the direction of arrow a. Then, it further proceeds in the direction a while being urged by the rotating auxiliary belt 42. When the guide bar 31 performs such an operation while the first conveyor 10 operates in the transport direction J, the belt 22 moves in the direction of sending out the tomato C toward the feed roller unit 23. On the other hand, in the state where the direction switching plate 41 is lowered, the guide rod 31 does not contact the direction switching plate 41 but goes straight (in the direction of arrow b) and proceeds to the guide way 40B. Does not move in the direction. The direction switching plate 41 is raised and lowered by a combination of a solenoid (not shown) and a coil spring.

  Next, the operation | movement which sorts tomato C with the fruit selection machine 1 comprised in this way is demonstrated (refer FIGS. 1-4). First, in the zone P, an operator places the tomato C on the delivery belt 13 (green) of the first conveyor 10 in operation. At this time, the tomato C is placed using the black mark B displayed on the surface of the delivery belt 13 as a placement guide. Since the width of the delivery belt 13 is smaller than ½ of the length of the tomato C, the tomato C is placed on the two delivery belts 13 in this example. Tomato C is conveyed in the direction of arrow J and reaches position detecting means 11. Here, light is irradiated from above the first conveyor 10. Then, the two delivery belts 13 on which the tomato C is placed are specified by a dedicated camera. This information is transmitted to a control means (not shown).

  Since the mark W applied on the green belt 22 is white, the difference in brightness from the green background color is large, and the camera can reliably recognize the mark W. Next, the size of the tomato C is photographed by a dedicated camera provided in the grade measuring means 12 and sent to the control means. In the control means, the grade (large, medium, small) of the size of tomato C is specified. Then, it is combined with the position information, and data indicating which size of tomato C is placed on which delivery belt 13 is created. Based on this data, the control means transmits an operation instruction to the first conveyor 10 and the second conveyor 14.

  Next, the movement of the tomato C will be described for the case where the tomato C is determined to be the medium size and the tomato C is placed on the conveyor belts 13A, 13B, 13C. This operation will be described with reference to FIGS. 5A to 5C in addition to FIGS. In addition, the front part of tomato C is called G1, and the rear part is called G3.

  When the delivery belt 13A on which the front part G1 of the tomato C is placed approaches the second conveyor 14B, the direction switching plate 41 of the delivery mechanism provided immediately before the second conveyor 14B rises. When the delivery belt 13A reaches the delivery mechanism, the guide rod 31 of the delivery belt 13A comes into contact with the direction switching plate 41 and is guided in the direction of arrow a. Then, the motive power is further transmitted to the auxiliary belt 42 from the side, and further proceeds in the direction a. When the guide bar 31 moves the lower side of the belt 22 in the direction away from the second conveyor 14B, the upper side of the belt 22 moves toward the second conveyor 14B, thereby operating the delivery belt 13A. The front part G1 of the tomato C is sent out to the delivery roller unit 23 (FIG. 5A). At this time, since the delivery belt 13B on which the rear part G3 of the tomato C is placed is not operated, the tomato C rotates slightly clockwise in the figure around the front part G1.

  Shortly after the operation of the delivery belt 13A, the delivery belt 13B on which the rear part G3 of the tomato C is placed approaches the delivery mechanism, and the guide rod 31 of the delivery belt 13B contacts the direction switching plate 41 in the direction of arrow a. Led. As a result, the feeding belt 13B is operated to feed the rear portion G3 of the tomato C to the feeding roller unit 23 (FIG. 5B). In addition, since the operation | movement which the sending belt 13B contact | abuts to the direction switching board 41 and sends out the tomato C to the sending roller unit 23 is the same as that of the sending belt 13A, description is abbreviate | omitted.

  At this time, the front part G1 of the tomato C reaches the delivery roller unit 23 and is transferred onto the two rows of rollers 23b on the first conveyor 10 side, and the rollers 23b are directed toward the second conveyor 14B (see FIG. Downward in) Operates to transport tomato C. On the other hand, the rear part G3 of the tomato C is placed on the delivery belt 13B, while being conveyed in the conveyance direction (rightward in the drawing) of the first conveyor 10, and the transmission belt 13B is directed toward the second conveyor 14B. It operates to send out (downward in the figure).

  Therefore, the movement direction is different between the front part G1 and the rear part G3 of the tomato C. That is, the front part G1 of the tomato C has only a motion component toward the second conveyor 14B and does not have a motion component in the transport direction of the first conveyor 10. On the other hand, the rear part G3 of the tomato C has a motion component in the transport direction of the first conveyor 10 in addition to the motion component toward the second conveyor 14B.

  Since the front part G1 and the rear part G3 are parts of the same tomato C and are integrally formed, the two different operations cause distortion of the movement direction in the whole tomato C. Here, as described above, since the belt 22 is made of a material having a high frictional resistance, the tomato C hardly slides on the belt 22. On the other hand, a constant gap is formed at the right end of the roller 23b due to the repulsive force between the magnets M1 and M2, and the front part G1 of the tomato C is easy to move in a direction (rightward) to reduce this distance. The distortion in the movement direction is eliminated by moving the roller 23b. In other words, the roller 23b on which the front portion G1 of the tomato C is placed moves in the conveying direction of the first conveyor 10 to absorb (cancele) the motion component in this direction. At the same time, the front part G1 of the tomato C is conveyed toward the second conveyor 14B by the rotation of the roller 23b. In this way, the tomato C rotates clockwise in the figure while canceling the motion component in the transport direction J by the delivery roller unit 23, and passes from the front G1 to the second conveyor 14B via the delivery roller unit 23. Change (Fig. 5 (c)).

  Of the two second conveyors 14B, the downstream side is intermittently operated. The operation timing is based on a command from the control means. Further, the operation time of the second conveyor 14B on the downstream side is from when the front part G1 of the tomato C is transferred to when the rear part G3 of the tomato C is transferred, and then the operation is stopped again.

  Thus, when tomato C is transferred between two orthogonal conveyors (first conveyor 10 and second conveyor 14B), the longitudinal direction of tomato C is conveyed in the conveying direction of the two conveyors. can do.

  At this time, since the delivery conveyors 13A and 13B are provided with protrusions 15 respectively, even if the tomato C moves against the delivery direction, the tomato C is pushed from the rear and surely directed toward the delivery roller unit 23. C can be sent out.

  In the above-described example, the first conveyor (first transport body) is configured in a straight line. However, the present invention is not limited to this, and may be configured in a U-shape or an L-shape, for example. May be configured. In the above example, one protrusion is provided at the approximate center of the delivery belt. However, the present invention is not limited to this, and the protrusion is provided on the side opposite to the side on which the object is placed. May be. Further, two or more protrusions 15 may be provided instead of one.

  Further, in the above-described example, the permanent magnet M2 is provided at the end of the roller 23b and the permanent magnet M1 fixed at the end of the support shaft 23a is opposed to the permanent magnet M1. Instead, the magnetic force may be changed as necessary by changing the current using an electromagnet. Further, instead of the magnets M1 and M2, a constant space may be formed at the end of the roller 23b using a coil spring. In this case, the support shaft 23a is rotatably inserted into the center of the coil spring. Moreover, although the 2nd conveyor 14 was provided in the substantially right angle direction with respect to the 1st conveyor 10, it is not limited to this, You may provide in diagonally forward or in parallel with the 1st conveyor 10. FIG.

  The grade measuring unit 12 may measure not only the size but also the sugar content of the fruit, the weight of the object, and the like. In this case, a sugar content sensor, a weight scale, and the like are mounted.

  As shown in FIG. 6, the second conveyor (second transport body) of the fruit selection machine may be disposed obliquely forward with respect to the transport direction J of the first conveyor (first transport body). Good. For example, the second conveyors 14 </ b> A ′, 14 </ b> B ′, and 14 </ b> C ′ are arranged with an angle of 70 degrees with respect to the transport direction J of the first conveyor 10. In addition, since the delivery roller unit 23 is disposed orthogonal to the first conveyor 10, a gap is formed between the delivery roller unit 23 and the second conveyors 14A ′, 14B ′, and 14C ′. For this reason, an oblique roller is disposed at the end of the conveyor on the upstream side of the second conveyors 14A ′, 14B ′, 14C ′ close to the feed roller unit 23 so as to fill this gap.

  When the second conveyors 14A ′, 14B ′, and 14C ′ are arranged in this manner, the extension of the second conveyors 14A ′, 14B ′, and 14C ′ is made the same length as compared with the first example, and the selection is performed. The space of the selection area occupied by the machine can be reduced.

  The object sorting apparatus of the present invention is not limited to sorting crops (objects) such as cucumbers and tomatoes. For example, it can be used to sort industrial products such as candles according to size and quality. It can be applied to classify objects.

1 Fruit sorter (object sorting device)
10 1st conveyor (1st conveyance body)
11 Position detecting means 12 Grade measuring means 13, 113 Sending belts 14A, 14B, 14C, 14A ', 14B', 14C 'Second conveyor (second carrier)
15 Protrusion 20a, 20b Roller 21a, 21b Rotating shaft 22, 122 Belt 23 Feeding roller unit 23a Rotating shaft 23b Roller 25 Unit base B, W Marking C Tomato (object)
M1, M2 magnet

Claims (4)

A first carrier for conveying and separating an object;
Position detecting means for optically detecting the position of the conveyed object;
Grade measuring means for measuring the grade of the object;
A plurality of delivery belts which are provided on the first transport body at regular intervals in the transport direction, and which feed the object from the first transport body in a substantially orthogonal direction at a desired position;
A control unit that instructs the sending belt to send out the object based on the position of the object detected by the position detecting unit and the grade of the object measured by the grade measuring unit;
An object sorting apparatus, wherein a marker for detecting the position of the object by the position detecting means is provided on the delivery belt, and the color of the marker is highly visible.   2. The object sorting apparatus according to claim 1, wherein a difference between the lightness of the color of the marker and the lightness of the color of the surface of the delivery belt is large.   The object sorting apparatus according to claim 1, wherein a width of the delivery belt is smaller than ½ of a major axis of the object.   The object sorting device according to claim 1, further comprising a protrusion for supporting the object from the rear when the object is sent onto the delivery belt.

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