JP2006320779A - Visual inspection device for flat tablet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize a probability of mixing of defective tablets into acceptable tablets and to inspect it with extremely high accuracy. <P>SOLUTION: This visual inspection device for flat tablet comprises a defective article lane 41 formed along the carrying direction on carrying belts 1, 2; an acceptable article lane 42 branch-formed from the defective article lane 41; and a selection means 45 provided on the branch point of the defective article lane and acceptable article lane, and moving the flat tablets on the carrying belt from the defective article lane to the acceptable article lane. Acceptable tablets having no appearance defect are led from the defective article lane to the acceptable article lane based on the inspection result of an acceptable/non-acceptable determining part, to sort the flat tablets into the acceptable tablets and unacceptable tablets. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, the flat tablet is placed on the transport belt and transported, and the flat tablet is photographed in the middle of transport to capture the image of the flat tablet, and the image is processed to determine the presence or absence of an appearance defect. The present invention relates to an appearance inspection device for a flat tablet that is classified into a non-defective tablet and a defective tablet based on the determination result.

  Conventionally, an appearance inspection for inspecting whether a defect such as adhesion, dirt, chipping or cracking of foreign matter, or defects such as defective printing has occurred in a tablet has been automatically performed using an appearance inspection apparatus.

  Conventionally, as a device for inspecting the appearance of flat tablets (hereinafter referred to as “flat tablets”), a plurality of transport drums are arranged with their outer peripheral surfaces close to each other, and the outer peripheral surfaces of these transport drums are flattened. While holding the tablet and transferring it between each drum, the flat tablet is transported, and the posture is changed such as reversing the front and back surfaces during the transport, and images of the tablets in each posture are captured and captured during the transport. Appearance inspection configured to inspect the presence or absence of appearance defects by image processing the image, and further to sort and collect good quality tablets without appearance defects and defective tablets having appearance defects based on the inspection results An apparatus is known (see, for example, Patent Document 1 below).

  However, in the case of an apparatus configured to hold the tablet on the surface of the transport drum and transfer the tablet between a plurality of transport drums so as to transport the tablet and change the posture of the tablet, the tablet is adsorbed to the drum surface. It is necessary to configure a suction mechanism for holding in a very narrow area inside the drum, and it is also necessary to highly control the suction operation for delivery between the drums. Inevitably, the conveyance path becomes very complicated, and extremely high control is required for the rotation speed and synchronization adjustment of each drum, which makes the apparatus highly complicated.

  Further, the delivery operation between the transport drums applies a large load to the tablet, and the tablet is likely to be chipped or broken. In this case, the occurrence of chipping or cracking may not only cause the tablet to be a defective product, but also cause the normal tablet to be detected as a defective product when the generated fragments or powder adhere to the normal tablet. .

  Further, in the case of such an automatic inspection apparatus, it is very difficult to set the removal rate of a tablet determined to be defective to 100%, and the probability that a defective tablet is mixed in a non-defective tablet is as close to 0% as possible. This is one of the major issues.

  On the other hand, an appearance inspection apparatus configured to place and hold a flat tablet on a conveyance belt in which an endless belt circulates and rotates is also known (see, for example, Patent Document 2 below).

In such an apparatus for carrying a belt, the conveyance path becomes simple compared to the case of drum conveyance, and the load applied to the tablet during conveyance can be made smaller than in the case of drum conveyance. Inconvenience of damage is unlikely to occur.
However, even in the case of such a belt conveying apparatus, the problem of the defective tablet removal rate is the same as in the case of drum conveyance, and the probability that the defective tablets are mixed in the non-defective tablets is further reduced, and more reliable. Development of an apparatus capable of performing high inspection is desired.

JP 2001-33392 A Japanese Patent Laid-Open No. 9-288061

  The present invention has been made in view of the above circumstances. A flat tablet is transported by a relatively simple transport path, and the flat tablet is transported by a relatively simple mechanism without requiring a complicated posture changing operation and a delivery operation. To provide a flat tablet appearance inspection apparatus that can perform appearance inspection while reducing the probability that a defective tablet is mixed into a non-defective tablet as much as possible, and can perform a more reliable inspection. With the goal.

  In order to achieve the above object, the present invention provides a transport belt for transporting a flat tablet placed on the surface by circulating and rotating an endless belt, and supplying the flat tablet in a flat state on the transport belt, A tablet supply unit for placing flat tablets on the transport belt, an imaging device for capturing the flat tablets placed on the transport belt and capturing the images of the flat tablets, and image processing of the captured images A pass / fail judgment unit for judging the presence or absence of an appearance defect and a sorting means for sorting the flat tablets on the transport belt into non-defective tablets and defective tablets, and the flat tablets from the tablet supply unit onto the transport belt The flat tablets are aligned and placed on a transport belt, and the flat tablets are continuously transported by the transport belt, and the image of the flat tablets is captured by the imaging device during the transport, Imported images In the appearance inspection apparatus for flat tablets that determines whether or not there is an appearance defect by performing image processing in the pass / fail determination unit, and sorts into a non-defective tablet and a defective tablet by the sorting means based on the determination result, the sorting means includes the above Defective product lanes formed on the transport belt along the transport direction, non-defective product lanes formed by branching from the defective product lanes, and branching portions of these defective product lanes and non-defective product lanes. Screening means for moving the flat tablets from the defective product lane to the non-defective product lane, and based on the determination result of the pass / fail determination unit, the non-defective tablets from the defective product lane by the selecting unit. Provided is a flat tablet appearance inspection apparatus which is introduced into a non-defective lane and separates flat tablets into non-defective tablets and defective tablets.

  That is, the appearance inspection apparatus of the present invention arranges and transports flat tablets to be inspected on a conveyor belt, conveys the images of the flat tablets in the middle of the conveyance, captures the images, and performs image processing on the images. The presence / absence of an appearance defect is determined, and a non-defective tablet having no appearance defect and a defective tablet having an appearance defect are separated based on the determination result. Flat tablets are aligned and placed on a transport belt, and the tablet It is configured to carry the image linearly, and to perform image capture, pass / fail judgment, and sorting operations during the conveyance, so that the tablets are conveyed by a simple conveyance path compared to the case of drum conveyance, and a complicated posture The appearance inspection of a flat tablet can be performed with a relatively simple mechanism without requiring a conversion operation or a delivery operation.

  Furthermore, in the appearance inspection apparatus of the present invention, as described above, the non-defective tablets and the defective tablets are sorted into the defective lane and the non-defective lane formed on the conveyor belt, respectively. In this case, a defective product lane into which defective tablets are introduced is provided along the conveying direction of the conveying belt, and all the tablets conveyed on the conveying belt are once introduced into the defective product lane, and the pass / fail judgment unit Based on the determination result, the non-defective tablet is moved from the defective lane to the above-mentioned non-defective lane by the sorting means, the non-defective tablet is conveyed in the non-defective lane, and the defective tablet is directly conveyed in the defective lane. Good and bad tablets are separated.

That is, in the appearance inspection apparatus of the present invention, the defective lane provided along the conveyance direction by the conveyance belt is not used to move the defective tablets from the conveyance direction by the conveyance belt to separate the non-defective tablets from the defective tablets. Then, the non-defective tablets are moved by the selecting means and introduced into the non-defective lanes branched from the defective lanes to separate the non-defective tablets from the defective tablets. Therefore, even if the sorting operation by the sorting means is out of synchronization or malfunctions and the sorting operation is not performed correctly, the non-defective tablets do not move from the defective product lane and flow through the defective product lane as they are. The defective tablets are not mixed into the tablet group collected as the non-defective tablets, only by mixing the non-defective tablets into the defective tablets.
Therefore, it is possible to reliably prevent a defective tablet from being mixed into a non-defective tablet due to poor synchronization or operation of the sorting operation by the sorting means, and reduce the probability that the defective tablet will be mixed into a non-defective tablet. Reliability can be improved.

Further, the appearance inspection apparatus of the present invention is provided with a tablet passage sensor on the defective product lane on the downstream side of the branch portion to detect the passage of the defective tablet. When the passage of the defective tablet is not detected by the tablet passage sensor, the supply of the flat tablet by the tablet supply unit is stopped and all the flat tablets on the transport belt are It can comprise so that it may discharge | emit outside and may collect | recover.
Further, in this case, as a mechanism for discharging all flat tablets on the transport belt out of the system, at least a part on the downstream side of the transport belt is swung downward, and the tablet passage sensor detects defective tablets. When the passage of the carrier is not detected, the downstream side of the conveyor belt can be swung downward to discharge all the flat tablets on the conveyor belt out of the system.
Thereby, the reliability of the inspection can be further improved.

In other words, the sorting means composed of the defective lane, the non-defective lane, and the sorting means can surely prevent the mixing of defective tablets when the sorting operation is not performed accurately, but the appearance defect is detected. If the defective tablet is moved to the non-defective lane due to malfunction of the sorting means or other inconveniences, the defective tablet is not formed by the above-mentioned sorting means alone. It will be mixed in non-defective tablets. The occurrence of such inconveniences such as malfunctions can be prevented in most cases by adjusting the processing capacity to a low level, etc. Is strongly desired.
In contrast, in the present invention, as described above, the tablet passage sensor is provided on the downstream side of the defective product lane, and a mechanism for discharging all tablets out of the system is provided, so that defective tablets are detected. Regardless, if the passage of the defective tablet is not detected by the tablet passage sensor, that is, if it is not confirmed that the defective tablet is reliably separated from the non-defective tablet, the sorting operation and the inspection operation are stopped, All of the tablets on the conveyor belt can be discharged out of the system, and a group of tablets possibly contaminated with defective tablets can be removed out of the system, further improving the reliability of the inspection.

  Furthermore, in this case, as a mechanism for discharging all flat tablets on the conveyor belt out of the system, as described above, at least a part of the downstream side of the conveyor belt is swung downward, thereby conveying It is possible to reliably discharge all the tablets on the transport belt out of the system by a relatively simple mechanism without the need for providing a complicated mechanism or a special device for removing the tablets from the belt. .

  Note that the tablet group discharged out of the system in this way may be collected and used for visual inspection again.

In addition, the appearance inspection apparatus of the present invention is provided with a first conveyor belt and a second conveyor belt as the conveyor belt, and the imaging device, the pass / fail judgment unit, and the separating unit are provided for both conveyor belts, Between the first transport belt and the second transport belt, there is provided a tablet inversion means for inverting the non-defective tablets from the non-defective lane, and the flat tablet supplied at random is placed in a flat state as the tablet supply unit. A first supply unit that controls the posture and supplies the first tablet on the first conveyor belt, and places the flat tablets on the first conveyor belt, and the flat tablet inverted by the tablet inversion means at a predetermined speed. There can be provided a second supply unit for supplying the flat tablets, which are supplied onto the two conveying belts, and are arranged and placed on the second conveying belt.
Thereby, when delivering from the said 1st conveyance belt to a 2nd conveyance belt, the both sides of a tablet can be reliably inspected by reversing a flat tablet, and also the surface inspection on a 1st conveyance belt In the back surface inspection on the second conveyor belt, the above-described highly reliable inspection can be performed.

  Further, in this case, at least one of the two image pickup devices that captures an image on the first transport belt or captures an image on the second transport belt, preferably both using a concave lens. A three-dimensional camera may be used to capture an image in which the front or back surface of the flat tablet and the peripheral side surface portion (hereinafter referred to as a side surface) are developed. Thereby, the image of the side surface of the flat tablet can be taken in simultaneously with the image of the front surface or the back surface, and the entire surface of the tablet on the front and back surfaces of the tablet and the entire periphery of the side surface can be inspected.

  Here, as the tablet reversing means for reversing the front and back of the flat tablet, for example, on the slightly vibrating substrate arranged to be inclined downward from the first conveying belt to the second conveying belt, 2 A reversing plate having a tablet reversing groove whose cross-sectional shape gradually changes toward the conveying belt can be used, and the flat tablet introduced into the tablet reversing groove from above the first conveying belt has an inclination of the reversing plate. It is possible to move the inside of the tablet inversion groove to the second conveyor belt by slight vibration and to invert the flat tablet by changing the cross-sectional shape of the tablet inversion groove.

In this case, the tablet inversion groove of the inversion plate is not particularly limited, but is preferably formed as in the examples described later. That is, the tablet reversing groove formed on the reversing plate has a cross-sectional shape having a width and a depth at which the flat tablet is accommodated in a flat state at the end on the first transport belt side, and the depth on one side is reduced. Gradually deepen and the bottom surface slopes downward to one side, while the other side wall slopes inward and the width of the groove gradually decreases, while the other side of the bottom surface rises. The cross-sectional shape has a width and depth that allows the flat tablet to be accommodated in an upright state at an almost middle portion, and the wall surface on one side gradually falls outward and the width of the groove toward one side. The depth of one side of the groove that spreads and expands to a predetermined width gradually becomes deeper, and at the end on the second transport belt side, the bottom surface is almost flat and the flat tablet is accommodated in a flattened state inverted. It is preferable to use a groove that changes to a deeper cross-sectional shape. .
Thereby, the flat tablet which reversed the front and back to the 2nd conveyance belt reliably by performing the reversing operation | movement of a flat tablet reliably can be supplied.

  That is, the cross-sectional shape of the tablet reversal groove is configured to gradually increase in depth while gradually changing the shape from the first conveying belt side, thereby reversing a part of the flat tablet in the direction of gravity. The posture is controlled so that a part of the flat tablet is lowered downward along the direction of gravity without performing any lifting operation, and the flat tablet is turned upside down. Therefore, the flat tablet moves smoothly in the tablet reversal groove by the inclination and slight vibration of the reversal plate, and at the same time, the posture is smoothly controlled and the front and back are reversed.

  The flat tablet appearance inspection apparatus of the present invention, as described above, transports the flat tablet through a relatively simple transport path, and does not require a complicated posture changing operation or delivery operation, and the flat tablet is operated by a relatively simple mechanism. In addition, it is possible to perform an appearance inspection while transporting the liquid, and to reduce the probability that a defective tablet is mixed into a non-defective tablet as much as possible, and to perform an extremely reliable inspection.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an example is shown and the appearance inspection device of the present invention is explained more concretely.
FIG. 1 shows an appearance inspection apparatus according to an embodiment of the present invention. This appearance inspection apparatus includes a first conveyance belt 1 and a second conveyance belt 2 that linearly convey tablets, and a first conveyance. A first supply unit (tablet supply unit) 3 for supplying flat tablets to the belt 1; and separation units (separation means) 4 and 4 provided in downstream portions of the first conveyance belt 1 and the second conveyance belt 2; A reversing plate (tablet reversing means) 5 for reversing the flat tablet from the first conveying belt 1 to the second conveying belt 2 and delivering it, and the flat tablet from the reversing plate 5 to the second conveying belt 2 at a predetermined speed. A second supply unit (tablet supply unit) 6 to supply, and two-dimensional cameras (imaging devices) 7 and 7 provided above the intermediate portions of the first conveyance belt 1 and the second conveyance belt 2, respectively. , The first transport of the flat tablet from the first supply unit The flat tablet is turned upside down by the reversing plate 5, further fed and transported onto the second transport belt 2 by the second feeding unit 6, and discharged from the discharge chute 81 to the outside of the apparatus. It is what is discharged. Then, during the conveyance, the flat tablets are photographed by the two-dimensional cameras 7 and 7 and the front and back images are taken in. The quality determination unit (not shown) performs image processing to determine the presence or absence of an appearance defect. The supplied flat tablets are separated into a defective tablet having an appearance defect and a non-defective tablet having no appearance defect by the sorting sections 4 and 4.

  As shown in FIG. 1, the tablet supply unit 3 controls the posture of a flat tablet in a flat state and supplies it to the first transport belt 1 at a predetermined speed, and from a hopper 33 through a chute 331. A vibration feeder 32 is provided for supplying the supplied flat tablet to be inspected to the ball feeder 31 at a predetermined speed.

  As shown in FIGS. 2 and 3, the ball feeder 31 is provided with a substantially truncated cone-shaped bulging portion 312 having a low height at the center of a disk 311 having a peripheral wall, and a vibrator 313. 3 gives a minute vibration that repeats a very small turning motion without rotating, and the flat tablet supplied on the disk 311 is swung in the direction of the arrow in FIG.

  As shown in FIG. 3, a feed plate 34 having a plurality of (six in this example) posture control grooves 341 formed therein is fitted into a part of the disk 311, and the disk is cut by the feed plate 34. The posture control groove 341 is formed on the upper surface of 311.

  As shown in FIG. 4 (A), the six posture control grooves 341 are arranged in parallel so as to be shifted back and forth along the flow direction of the tablet on the ball feeder 31 (arrow direction in the figure). The cross-sectional shape is as shown in FIGS. That is, FIG. (C) shows a cross section of a, b, c, and d portions shown in FIG. (B). As shown in FIGS. (B) and (C), a cross section of the attitude control groove 341 is shown. The shape is formed at a width and depth at which the flat tablet is accommodated in a flat state at the upstream end portion in the flow direction (part a), and the depth on one side gradually increases toward the downstream side. As the bottom surface inclines downward to one side, the wall surface on the other side inclines inward and the width of the groove gradually decreases, and at the same time the other side of the bottom surface rises (b , C portion), at the downstream end in the flow direction, the cross-sectional shape has a width and depth in which the flat tablet is accommodated in an upright state (d portion).

  Thereby, as shown in FIG. 4C, the flat tablet t flowing on the ball feeder 31 enters the posture control groove 341 in the flat state and flows in the groove 341 to the downstream side. Then, the posture is changed from the flat state to the upright state while being guided by the change in the cross-sectional shape of the posture control groove 341. 4C, the downstream end of the posture control groove 341 in the flow direction is a through hole without a bottom surface, and the flat tablet t whose posture is controlled in an upright state. Is introduced into the supply chute 351 of the chute block 35 disposed below.

  The chute block 35 is disposed below the feed plate 34 attached to the ball feeder 31 as shown in FIGS. 1 and 2, and the attitude control is performed as shown in FIG. This is a square block-shaped member in which six supply chutes 351 are formed corresponding to the grooves 341. The six supply chutes 351 are hollow passages having a square cross section, and as shown in FIG. 5A, both ends of the chute block 35 are the upper surface and the right side surface (the surface facing the first conveyor belt 1). Is open. The opening position is obliquely arranged on the upper surface of the chute block 35 corresponding to the through hole provided at the downstream end of the attitude control groove 341 as shown in FIGS. Thus, the through hole of the attitude control groove 341 and the supply chute 351 communicate with each other. On the other hand, on the right side surface of the chute block 35 (the surface facing the first conveyor belt 1), as shown in FIGS. Are arranged and open.

  In this way, a flat tablet is put into the ball feeder 31 from the vibration feeder 32 at a predetermined speed, and the flat tablet is posture-controlled by the posture control groove 341 and is put into the supply chute 351 of the chute block. It has become so.

  Further, as shown in FIGS. 1 to 3, a plate-shaped supply guide 36 is disposed between the chute block 35 and the first transport belt 1. As shown in FIG. 3, the supply guide 36 is formed with six guide grooves 361 on the upper surface through which flat tablets can pass in a flat state, and one end of the guide groove 361 is formed on the chute block. 35 is arranged close to the opening of each supply chute 351, and the other end is curved to widen the space between the guide grooves 361 and is open to the tip of the supply guide 36. Further, as shown in FIG. 3, six notches are formed in a substantially comb-like shape at the edge of the supply guide 36 on the first conveying belt 1 side. The end of each guide groove 361 is open.

  As shown in FIGS. 1 and 2, the supply guide 36 is disposed in a state where the supply guide 36 is inclined downward from the chute block 35 side toward the first conveying belt 1 side, and as described above, one end is provided for each of the supply units. It is close to the opening of the chute 351 and the other end is close to the upper surface of the conveyor belt 1. Further, the supply guide 36 is supported by a vibrator 362, and is vibrated slightly by the vibrator 362 in the front-rear direction (left-right direction in FIGS. 1 and 2).

  As a result, the flat tablets move from the supply chutes 351 of the chute block 35 into the guide grooves 361 of the supply guide 351 in a flat state, and the flat tablets move into the guide grooves 361 due to the inclination and slight vibration of the supply guide 36. Is moved to the first conveying belt 1 side at a predetermined speed.

Further, as shown in FIGS. 1 and 2, a first cutting roller 37 having an outer peripheral surface formed of a soft material such as silicone rubber on the end portion of the supply guide 36 on the first conveying belt 1 side. Is arranged, and is rotated continuously or intermittently at a predetermined speed.
Thereby, the flat tablet moving in each guide groove 361 of the supply guide 36 comes into contact with the first cutting roller 37 and the movement is temporarily stopped or decelerated. It is sent out onto the first conveyor belt 1 at a speed.

  Accordingly, the flat tablets supplied and placed on the first transport belt 1 are not in contact with each other or are in close proximity to each other, and the flat tablets are aligned in a line at a certain interval or more on the first transport belt 1. It is supposed to be placed on.

  As shown in FIG. 1, an endless belt is laid between the pair of rollers 11 and 12 and circulates and rotates in the first conveying belt 1 and is disposed along the horizontal direction. . As shown in FIGS. 1, 6 and 7, the first conveying belt 1 is provided with an intermediate roller 13 on the downstream side of the intermediate portion and on the inner side of the endless belt. An auxiliary roller 14 is disposed outside the endless belt slightly below the roller 13 and on the upstream side. As shown in FIG. 7, the downstream end from the intermediate roller 13 to the downstream roller 12 can swing downward about the intermediate roller 13. The intermediate portion of the endless belt is supported by the intermediate roller 13 and the auxiliary roller 14, and in this state, the endless belt can rotate and rotate as usual.

  As shown in FIGS. 1, 6, and 7, a sorting plate 4 is disposed on the upper surface of the downstream end portion of the first transport belt 1, and the first transport belt 1 is arranged by the sorting plate 4. A sorting unit (sorting means) for sorting flat tablets into good and bad tablets is formed on the top.

  The separation plate 4 is disposed with its lower surface close to the upper surface of the first conveyor belt 1, and a plurality of grooves provided on the lower surface side, as shown in FIG. Six sorting lanes 43 composed of combinations of the lanes 42 are formed, and the flat pills placed on the first transport belt 1 and transported by the sorting lanes 43 are separated into non-defective tablets and defective tablets. It is supposed to be.

  That is, as shown in FIG. 8, the defective lane 41 formed linearly along the conveying direction of the first conveying belt 1 by the plurality of grooves formed on the lower surface of the sorting plate 4 and the non-performing lane 41. Separation lanes 43 are formed along the conveyance direction of the first conveyance belt 1 and are formed in parallel with the conveyance direction of the first conveyance belt 1. Has been. Further, a pressure air injection nozzle (sorting means) 45 is provided at the branch portion of each separation lane 43 on the defective product lane side, and the compressed air is injected toward the non-defective product lane 42. Yes.

  Thereby, all the flat tablets flowing on the first transport belt 1 enter the defective lane 41 side of the sorting lane 43, and compressed air is jetted from the compressed air jet nozzle 45 to the flat tablets at the same timing. Is transferred to the non-defective product lane 42 and conveyed downstream in the non-defective product lane 42. On the other hand, if the flat tablet that has flowed is a defective tablet with a defective appearance, According to the command, the compressed air injection from the compressed air injection nozzle 45 is not performed, and the defective tablet t ′ is transported downstream as it is in the defective product lane 41, and the non-defective tablet with the appearance defect and the defective tablet t ′ with the appearance defect are Each is classified into a non-defective product lane 42 and a defective product lane 41.

  Here, the compressed air injection from the compressed air injection nozzle 45 is controlled by a quality determination unit (not shown) as described above. The pass / fail judgment unit performs image processing on an image captured by the two-dimensional camera 7 (see FIG. 1) disposed above the intermediate portion of the first transport belt 1 to determine the presence or absence of an appearance defect. The compressed air injection nozzle 45 is controlled as to whether or not to perform injection, and the injection timing of compressed air is controlled. The two-dimensional camera 7 uses a concave lens. By photographing the flat tablet placed on a flat surface in a flat state with the two-dimensional camera 7, the upper surface and the peripheral side surface portion ( (Hereinafter, referred to as a side surface) can be taken in, so that one side and the side surface of the flat tablet can be inspected at the same time.

Next, the reversing plate (tablet reversing means) 5 reverses the non-defective tablets sorted by the sorting unit 4 and supplies them to the second conveyor belt 2.
As shown in FIGS. 1, 6, and 7, the reversing plate 5 is supported by the vibrator 53 and is located between the downstream end portion of the first transport belt 1 and the upper both end portions of the second transport belt 2. Is arranged so as to be stretched over the first conveyor belt 1 and is inclined downward from the first conveyor belt 1 side toward the second conveyor belt 2 side by the vibrator 53 in the front-rear direction (the left-right direction in FIGS. ) To vibrate slightly.

On the upper surface side of the reversing plate 5, as shown in FIG. 9, there are six tablet reversing grooves 51 corresponding to the non-defective lanes 42 of the respective sorting lanes 43, and defective product lanes 41 of the respective sorting lanes 43. Corresponding six defective tablet discharge grooves 52 are formed. As shown in FIG. 8, each tablet inversion groove 51 and each non-defective product lane 42, each defective tablet discharge groove 52 and each defective product lane 41 are formed. Are arranged so as to communicate with each other. Further, as shown in FIG. 9, each defective product discharge groove 52 has one end opened to the upstream end of the reversing plate 5 and the other end provided upstream of the intermediate portion. It communicates with the defective product discharge hole 54. On the other hand, each tablet reversal groove 51 is formed such that both ends are open to both the upstream and downstream ends of the reversal plate 5 and the cross-sectional shape gradually changes from the upstream side to the downstream side as shown in FIG. Has been.

  That is, FIGS. 10A to 10K show the cross section from the upstream side A to the downstream side K of the reversing plate 5 shown in FIG. 9, but the cross-sectional shape of the tablet reversing groove 51 is as shown in FIG. From the cross-sectional shape having a width and a depth in which the flat tablet t is accommodated in a flat state at the end on the first conveying belt 1 side, the depth on one side (right side in the figure) gradually increases. At the same time, the bottom surface is inclined downward to one side (B, C), and the wall surface on the other side (left side in the figure) is inclined inward, and the width of the groove gradually decreases. The other side of the bottom surface rises (D, E), and has a cross-sectional shape having a width and a depth that can be accommodated in a state where the flat tablet t is in an upright state in the middle (F), and further to one side (in the figure) The right wall) gradually falls to the outside, and the width of the groove widens to one side (G, H). The depth of one side (right side in the figure) of the groove is gradually increased (I, J), and at the end of the second conveying belt, the bottom surface is almost flat and the flat tablet is inverted. It has a cross-sectional shape (K) with a deeper depth.

  Thereby, the flat tablet introduced into the tablet reversal groove 51 from the non-defective product lane 42 by the circulation rotation of the first transport belt 1 is moved to the second transport belt 1 side by the inclination and slight vibration of the reversal plate 5. As shown in FIGS. 10A to 10K sequentially, the flat tablet t is guided by the change in the cross-sectional shape of the tablet reversal groove 51 and is turned into a flat state in which the front and back are reversed. Converted.

  On the other hand, the defective tablet t ′ introduced into the defective tablet discharge groove 52 of the reversing plate 5 from the defective product lane 41 of the sorting lane 43 falls downward from the defective product discharge hole 54 and is discharged out of the system. Is done. Here, as shown in FIGS. 6 and 7, a first discharge chute 55 is disposed below the upstream side of the reversing plate 5, and a defective product discharge portion of the first discharge chute 55 is disposed. Through 551, the defective tablet t ′ dropped from the defective product discharge hole 54 is collected in the defective tablet collection can 56.

  Here, the first discharge chute 55 is provided with a whole tablet discharge portion 552 together with the defective product discharge portion 551, and as shown in FIG. 7, the downstream end of the first conveyor belt 1. When the part swings downward, all tablets on the first conveyor belt 1 are received by the whole tablet discharge part 552 and guided to the discharged tablet recovery can 57 for recovery. Such discharge of all tablets is performed when the sorting unit 4 has not confirmed the sorting of defective tablets.

  That is, as shown in FIG. 8, the sorting plate 4 is provided with a tablet passage sensor 46 on each defective product lane 41 that is located downstream of the branch portion and detects passage of the tablet. By detecting the passage of the tablet by the tablet passage sensor 46, it is confirmed that the defective tablet t ′ does not move to the non-defective product lane 42 but flows downstream in the defective product lane 41. ing. In this case, even when a defective tablet is detected by the quality determination unit, the passage of the defective tablet t ′ is not detected by the tablet passage sensor 46 provided in the defective product lane 41 of the sorting unit 4. The supply of the flat tablet by the first supply unit 3 is stopped, and the downstream end of the first conveying belt 1 is swung downward as shown in FIG. All the flat tablets are discharged out of the system without moving to the reversing plate 5 and are collected in the discharged tablet collection can 57 through the entire tablet discharge portion 552 of the first discharge chute 55. .

  Next, the flat tablet which has flowed downstream in the tablet reversing groove 51 of the reversing plate 5 and turned upside down is second supplied by the downstream end of the reversing plate 5 and the second cutting roller 61. It is supplied onto the second conveyor belt 2 by the section 6.

  That is, as shown in FIGS. 1, 6, and 7, on the second conveying belt 2 side end of the reversing plate 5, similarly to the first cutting roller 37 of the first supply unit 3, A second cutting roller 61 is disposed, and the second cutting roller 61 rotates continuously or intermittently at a predetermined speed. As a result, as in the case of the first supply unit 3, the flat tablet moving in each tablet reversing groove 51 of the reversing plate 5 comes into contact with the second cutting roller 61 and the movement is temporarily stopped or decelerated. The second cutting roller 61 is rotated to be fed onto the second conveyor belt 2 at a predetermined speed.

  As shown in FIG. 1, the second conveyor belt 2 is an endless belt which is laid between a pair of rollers 21 and 22 and circulates and rotates along the horizontal direction. Further, a two-dimensional camera 7 is disposed above the intermediate portion of the second conveyor belt 2 in the same manner as the first conveyor belt 1, and the same as the first conveyor belt 1 is provided on the downstream end. A sorting plate 4 is provided, and the presence or absence of an appearance defect is determined by the same operation as on the first conveying belt 1 so that the non-defective tablet and the defective tablet are separated.

  As shown in FIGS. 1 and 11, a sorting box 8 communicating with the sorting lane 43 of the sorting plate 4 is attached to the downstream end of the second transport belt 2. As shown in FIG. 11, the sorting box 8 includes a discharge chute 81 for guiding the inserted tablets to the outside of the apparatus and a whole tablet discharge portion 93 for the second discharge chute 9 for guiding the discharged tablets to the recovery canister 91. And a defective tablet passage 83 for guiding the inserted flat tablet to the defective product discharge portion 94 of the second discharge chute 9 that guides the loaded flat tablet to the defective tablet recovery can 92. Yes.

  The defective product lane 41 of the sorting plate 4 communicates with the defective tablet passage 83, and the defective tablet collects the defective tablet collection can 92 through the defective tablet passage 83 and the defective product discharge portion 94 of the second discharge chute 9. It has come to be collected. Further, the switching flap 82 is normally in a state in which the discharge chute 81 side is opened, and the flat tablets from the non-defective lane 42 of the sorting plate 4 are discharged out of the apparatus through the discharge chute 81. . Further, in the case where the passage of the defective tablet is not detected by the tablet passage sensor even though the defective tablet is detected by the pass / fail judgment unit, the flat tablet by the first supply unit 3 and the second supply unit 6 is detected. The supply is stopped, the switching flap 82 is switched to close the discharge chute 81 side, the second discharge chute 9 side is opened, and all the flat tablets from the non-defective lane 42 are transferred to the entire second discharge chute 9. The discharged tablet collection can 91 is collected through the tablet discharge unit 93.

The operation of appearance inspection by this appearance inspection apparatus will be described in sequence as follows.
First, the flat tablet to be inspected put into the hopper 33 is supplied to the vibration feeder 32 through the chute 331 and is supplied from the vibration feeder 32 to the ball feeder 31 at a predetermined speed.

  As shown in FIG. 4C, the flat tablet charged in the ball feeder 31 is swung on the disk 311 of the ball feeder 31 by the swirling fine vibration of the ball feeder 31 as described above. The posture is controlled by the posture control groove 341, and sequentially passes through the supply chute 351 of the chute block 35 and the guide groove 361 of the supply guide 36, and is aligned on the upper surface of the first conveying belt 1 at a predetermined speed by the first cutting roller 37. Placed.

  The flat tablet placed on the first transport belt 1 is transported by the endless belt circulation drive, is captured by the two-dimensional camera 7 during the transport, and the image is taken in by the quality determination unit. The presence or absence is determined and introduced into the sorting lane 43. Then, the defective tablet and the non-defective tablet are separated by the above-described operation, the defective tablet is collected in the defective tablet collection can 56, and only the non-defective tablet without appearance defect passes through the reversing plate 5 to the second transport belt 2. Supplied with.

  At this time, in the case where the appearance defect is detected by the pass / fail determination unit and it is determined as a defective tablet, but the passage of the defective tablet t ′ is not detected by the tablet passage sensor 46, as described above, While stopping supply of the flat tablet by the 1st supply part 3, as FIG. 7 showed, the 1st conveyance belt 1 downstream side edge part is swung below, and all the 1st conveyance belt 1 on the 1st conveyance belt 1 is swung. The flat tablets are discharged out of the system without moving to the reversing plate 5 and are collected into the discharged tablet collection can 57 through the entire tablet discharge portion 552 of the first discharge chute 55, and the defective tablets are contained in the non-defective tablets. Make sure to prevent contamination.

  The non-defective tablets introduced into the reversing plate 5 pass through the tablet reversing grooves 51 of the reversing plate 5 and are conveyed onto the second conveying belt 2 by the second supply unit 6. At this time, by passing through the tablet reversal groove 51, the front and back of the flat tablet are reversed by the above-described operation, and are supplied to the second transport belt 2 in a state where the front and back are reversed.

  Then, it is transported on the second transport belt 2 and, like the case on the first transport belt 1, the appearance inspection of the back surface is performed by taking in the image and turning it upside down. According to the above-described operation, the non-defective tablets without appearance defects are discharged from the discharge chute 81 to the outside of the apparatus by the sorting box 8, and the defective tablets whose appearance defects are detected are collected in the defective tablet collection can 92. .

  Also in this case, when a defective tablet is detected by the pass / fail determination unit but the passage of the defective tablet t ′ is not detected by the tablet passage sensor 46 provided in the defective product lane 41 of the sorting unit 4. In the operation described above, all flat tablets from the non-defective lane 42 are collected in the discharged tablet collection can 91 through the entire tablet discharge portion 93 of the second discharge chute 9, and the defective tablets are mixed into the non-defective tablets. Is surely prevented.

  The flat tablets collected in the discharged tablet collection can 91 and the discharged tablet collection can 57 may be returned to the hopper 33 and used for inspection again.

  As described above, the appearance inspection apparatus of the present embodiment aligns and transports the flat tablets to be inspected on the transport belts 1 and 2, captures the images by capturing the flat tablets in the middle of the transport, Image processing is performed to determine the presence or absence of an appearance defect, and a non-defective tablet having no appearance defect and a defective tablet having an appearance defect are separated based on the determination result. Are arranged in a line, and the tablets are linearly transported, and during the transport, the image is captured, the quality is judged, and the sorting operation is performed. Therefore, the transport path is simpler than in the case of drum transport. Therefore, the appearance inspection of the flat tablet can be performed with a relatively simple mechanism without requiring a complicated posture changing operation and a delivery operation.

  Further, in this embodiment, as shown in FIG. 8, the non-defective tablets and the defective tablets are separated into the defective product lane 41 and the good product lane 42 formed on the conveyor belts 1 and 2, respectively. ing. In this case, a defective product lane 41 into which defective tablets are introduced is provided along the conveying direction of the conveying belt, and all tablets conveyed on the conveying belts 1 and 2 are once introduced into the defective product lane 41. Then, based on the determination result of the pass / fail determination unit, the non-defective tablets are moved from the defective lane 41 to the non-defective lane 42 by compressed air injection (sorting means), and the non-defective tablets are conveyed in the non-defective lane 42, The defective tablet t ′ is conveyed as it is in the defective product lane 41 so that the non-defective tablet and the defective tablet are separated.

That is, in this visual inspection apparatus, defective products are provided along the conveying direction by the conveying belts 1 and 2 instead of moving the defective tablets in the direction from the conveying direction by the conveying belt to separate the non-defective tablets from the defective tablets. The non-defective tablet t is moved from the lane 41 by the selecting means 45 and introduced into the non-defective lane 42 provided by branching from the defective lane 41 to separate the non-defective tablet from the defective tablet. Therefore, even when the sorting operation 45 is not synchronized correctly or the sorting operation is not performed correctly, the non-defective tablet does not move from the defective product lane 41 and flows through the defective product lane 41 as it is. The non-defective tablet is not mixed in the tablet group collected as the non-defective tablet only by mixing the non-defective tablet into the recovered defective tablet.
Therefore, it is possible to reliably prevent a defective tablet from being mixed into a non-defective tablet due to poor synchronization or operation of the sorting operation by the sorting means, and reduce the probability that the defective tablet will be mixed into a non-defective tablet. Reliability can be improved.

In addition, the appearance inspection apparatus is provided with a tablet passage sensor 46 on the defective product lane 41 which is located downstream of the branch portion between the defective product lane 41 and the non-defective product lane 42 and detects the passage of the defective tablet. When the defective tablet is not detected by the tablet passage sensor 46 even though the defective tablet is detected by the quality determination unit, the supply of the flat tablets by the tablet supply units 3 and 6 is stopped. At the same time, all the flat tablets on the conveyor belts 1 and 2 are discharged out of the system and collected.
Thereby, the reliability of the inspection can be further improved.

In other words, the sorting means constituted by the defective product lane 41, the non-defective product lane 42, and the sorting means 45 can reliably prevent the mixing of defective tablets when the sorting operation is not accurately performed as described above. However, if the defective tablet has been moved to the non-defective lane 42 due to the malfunction of the sorting means 45 or other inconvenience even though it is a defective tablet in which an appearance defect has been detected, the above sorting is performed. Only with the configuration of the means, defective tablets will be mixed into non-defective tablets.
Therefore, in this embodiment, the tablet passage sensor 46 is provided on the downstream side of the defective product lane 41, and a mechanism for discharging all the tablets on the conveyor belts 1 and 2 to the outside of the system is provided to detect defective tablets. However, when the passage of the defective tablet is not detected by the tablet passage sensor 46, that is, when it is not confirmed that the defective tablet has been reliably separated from the non-defective tablet, the separation operation and the inspection operation are performed. Can be discharged, and all the tablets on the conveyor belts 1 and 2 can be discharged out of the system, and the group of tablets possibly contaminated with defective tablets can be removed out of the system, further improving the reliability of the inspection. It is something that can be done.

Further, in this case, the first conveyor belt 1 swings a part of the downstream side of the first conveyor belt 1 downward as a mechanism for discharging all the flat tablets on the first conveyor belt 1 to the outside of the system. When the passage of the defective tablet is not detected by the tablet passage sensor 46, the downstream side of the first transport belt 1 is swung downward so that all the flat tablets on the transport belt are It is configured to discharge out of the system.
Thus, as a mechanism for discharging all the flat tablets on the transport belt out of the system, at least a part of the downstream side of the transport belt is swung downward, so that the tablets can be removed from the transport belt. It is possible to reliably discharge all the tablets on the transport belt out of the system by a relatively simple mechanism without the need for providing a complicated mechanism or a special device for eliminating them.

  In addition, the appearance inspection apparatus is provided with a first conveyor belt 1 and a second conveyor belt 2 and a two-dimensional camera 7, a pass / fail judgment unit and a separating means 4 on both conveyor belts 1 and 2, respectively. Between the first conveyor belt 1 and the second conveyor belt 2, there is provided a tablet inversion means 5 for inverting the non-defective tablets, and the first supply unit 3 for supplying the flat tablets on the first conveyor belt, By providing a second supply unit 6 for supplying the flat tablet, which is reversed by the tablet reversing means, onto the second transport belt at a predetermined speed, the flat tablet is transferred from the first transport belt 1 to the second transport belt 2. When handing over, the flat tablet can be turned upside down so that both sides of the tablet can be reliably inspected, and in the surface inspection on the first conveyor belt 1 and the back surface inspection on the second conveyor belt 2 , Each of the trusts mentioned above It is capable of performing high inspection.

  Furthermore, in this case, the imaging device that captures an image on the first transport belt 1 and captures an image on the second transport belt is a two-dimensional camera 7 using a concave lens, and the surface of the flat tablet or An image in which the back surface and the side surface are developed is captured. Thereby, the image of the side surface of the flat tablet can be captured simultaneously with the image of the front surface or the back surface, and the appearance of the entire surface of the tablet on both the front and back surfaces of the tablet and on the entire side surface of the tablet can be inspected.

  Here, in this embodiment, as the tablet reversing means for reversing the front and back of the flat tablet, the first conveying belt is placed on the slightly vibrating substrate disposed so as to be inclined downward from the first conveying belt 1 to the second conveying belt 2. Using the reversal plate 5 formed with the tablet reversal groove 51 whose cross-sectional shape gradually changes from 1 to the second transport belt 2, the flat tablet introduced into the tablet reversal groove 51 from the first transport belt 1 is reversed. The inside of the tablet inversion groove 51 is moved to the second conveying belt 2 by the inclination and slight vibration of the plate 5 and the flat tablet is inverted by a change in the cross-sectional shape of the tablet inversion groove 51.

In this case, as shown in FIG. 10, the tablet reversing groove 51 of the reversing plate 5 has a cross section having a width and a depth at which the flat tablet is accommodated in a flat state at the end on the first transport belt 1 side. From the shape (A), the depth on one side gradually becomes deeper and the bottom surface is inclined downward (B, C), and the wall on the other side is inclined inward to form a groove. At the same time, the other side of the bottom surface rises (D, E), and has a cross-sectional shape having a width and depth that can be accommodated in a state where the flat tablet is upright in the middle (F) ) Further, the wall on one side gradually falls to the outside and the width of the groove spreads to one side (G, H), and the depth on one side of the groove that has spread to a predetermined width gradually increases. Deepens (I, J), the bottom of the second conveyor belt 2 side is almost flat, and the flat tablet is inverted Was being and varying groove to deeply since the cross-sectional shape of the depth to be accommodated (K) in the lying state.
Thereby, the flat tablet which reversed the front and back can be reliably supplied to the 2nd conveyance belt 2 by smoothly performing the reversing operation of the flat tablet.

  That is, the cross-sectional shape of the tablet reversal groove 51 is configured to gradually increase in depth while gradually changing the shape from the first conveying belt 1 side, whereby a part of the flat tablet is made to move in the gravity direction. The posture is controlled so that a part of the flat tablet is lowered downward along the direction of gravity without performing any operation for lifting the flat tablet, and the flat tablet is turned upside down. Therefore, the flat tablet moves smoothly in the tablet reversal groove 51 by the inclination and slight vibration of the reversal plate 5, and at the same time, the posture is smoothly controlled and the front and back are reversed.

  As described above, the visual inspection apparatus according to the present embodiment transports flat tablets through a relatively simple transport path, and transports flat tablets with a relatively simple mechanism without requiring a complicated posture changing operation and a delivery operation. In addition, the appearance inspection can be performed, and the probability that a defective tablet is mixed into a non-defective tablet can be reduced as much as possible, and an extremely reliable inspection can be performed.

  In addition, this invention is not limited to the said Example, The structure, shape, arrangement | positioning, combination, etc. of each part may be changed suitably in the range which does not deviate from the summary of this invention.

It is the schematic which shows the external appearance inspection apparatus of the flat tablet concerning one Example of this invention. It is the schematic which made a part the cross section which shows the 1st supply part which comprises the apparatus. It is a top view which shows the ball feeder which comprises the 1st supply part. The feed plate attached to the ball feeder is shown. (A) is a plan view, (B) is an enlarged plan view showing a posture control groove formed in the feed plate, and (B) is a cross section of the same-shape control groove. It is a fragmentary sectional view which shows a shape. The chute | block which comprises the 1st supply part is shown, (A) is a top view, (B) is a right view, (C) is sectional drawing along CC line of (B). It is the schematic which shows the tablet inversion part of the apparatus. It is the schematic which shows the tablet inversion part of the apparatus, and shows the state which the downstream end part of the 1st conveyance belt swung below. It is the top view which made a part the cross section which shows the classification | category part of the apparatus. It is a top view which shows the inversion plate which comprises the apparatus. It is a fragmentary sectional view which shows the cross-sectional shape of the tablet inversion groove | channel formed in the inversion plate. It is the schematic which shows the downstream edge part part of the 2nd conveyance belt which comprises the apparatus.

Explanation of symbols

1 First conveyor belt (conveyor belt)
2 Second conveyor belt (conveyor belt)
3 First supply unit (tablet supply unit)
31 Ball feeder 35 Cutting roller 36 Supply guide 4 Sorting plate (sorting part, sorting means)
41 Defective product lane 42 Good product lane 43 Sorting lane 45 Pressure air injection nozzle (selection means)
46 Tablet passage sensor 5 Reversing plate (tablet reversing means)
51 Tablet reversal groove 52 Defective tablet discharge groove 54 Defective product discharge hole 6 Second supply section (tablet supply section)
61 Cutting roller 7 Two-dimensional camera (imaging device)
8 Selection box 81 Switching flap

Claims (7)

A transport belt for transporting the flat tablet placed on the surface by circulating and rotating the endless belt;
Supplying a flat tablet in a flat state on the conveyor belt, and a tablet supply unit for placing the flat tablet on the conveyor belt;
An imaging device that captures an image of the flat tablet by photographing the flat tablet placed on the conveyor belt;
A pass / fail determination unit that performs image processing on the captured image to determine the presence or absence of an appearance defect;
A separation means for separating the flat tablets on the conveyor belt into good and bad tablets,
The flat tablets are supplied from the tablet supply unit onto the transport belt, the flat tablets are aligned and placed on the transport belt, and the flat tablets are continuously transported by the transport belt, and the imaging is performed during the transport. An image of the flat tablet is captured by the apparatus, the captured image is subjected to image processing by the quality determination unit to determine the presence or absence of an appearance defect, and based on the determination result, the non-defective tablet and the defective tablet In the appearance inspection device for flat tablets to be separated into
The sorting means is
Defective product lane formed along the transport direction on the transport belt,
A non-defective lane formed by branching from the defective lane;
Provided at a branch portion between the defective product lane and the non-defective product lane, and comprises a sorting means for moving the flat tablet on the transport belt from the defective product lane to the good product lane,
Based on the determination result of the pass / fail determination unit, a non-defective tablet having no appearance defect is introduced from the defective product lane to the non-defective lane by the selecting means, and the flat tablet is separated into the non-defective tablet and the defective tablet. Appearance inspection device for flat tablets.   Claims wherein the selecting means is a compressed air injection nozzle that injects compressed air toward the non-defective lane, and is configured to inject compressed air onto the non-defective tablets on the transport belt and introduce the non-defective tablets into the non-defective lane. Item 1. An appearance inspection apparatus according to item 1.   On the defective product lane, there is provided a tablet passage sensor that is located downstream of the branching portion and detects the passage of the defective tablet. Even though the defective tablet is detected by the pass / fail judgment unit, the tablet When the passage sensor does not detect the passage of a defective tablet, the supply of the flat tablet by the tablet supply unit is stopped, and all the flat tablets on the transport belt are discharged out of the system and collected. The visual inspection apparatus according to claim 1 or 2.   At least a part of the downstream side of the conveyor belt is configured to swing downward, and when the passage of the defective tablet is not detected by the tablet passage sensor, the downstream side of the conveyor belt swings downward. 4. An appearance inspection apparatus according to claim 3, wherein all the flat tablets on the conveyor belt are discharged out of the system.   As the conveyor belt, a first conveyor belt and a second conveyor belt are provided, and the imaging device, the pass / fail judgment unit and the sorting unit are provided for both conveyor belts, and the first conveyor belt and the second conveyor belt. And a tablet reversing means for reversing the non-defective tablets from the non-defective lane on the front and back, and as the tablet supply unit, the posture of the flat tablets to be randomly supplied is controlled in a flat state to be on the first conveying belt. A first supply unit for aligning and placing the flat tablets on the first conveying belt, and the flat tablets inverted by the tablet reversing means are supplied to the second conveying belt at a predetermined speed. The visual inspection apparatus according to any one of claims 1 to 4, further comprising a second supply unit that aligns and places the flat tablets that are reversed on the front and back sides on the two conveying belts.   The tablet reversing means gradually changes its cross-sectional shape from the first conveying belt side to the second conveying belt side on the slightly vibrating substrate disposed so as to be inclined downward from the first conveying belt to the second conveying belt. The reversing plate is formed with a reversing plate formed with a tablet reversing groove, and a flat tablet introduced into the tablet reversing groove from above the first conveying belt passes through the second reversing belt in the tablet reversing groove due to the inclination and slight vibration of the reversing plate. The appearance inspection apparatus according to claim 5, wherein the flat tablet is reversed by changing the cross-sectional shape of the tablet reversal groove. The tablet reversal groove formed in the reversal plate is gradually deeper in one side from the cross-sectional shape having a width and depth in which the flat tablet is accommodated in a flat state at the end on the first transport belt side. As the bottom surface is inclined downward to one side, the wall surface on the other side is inclined inward and the width of the groove is gradually narrowed, and at the same time the other side of the bottom surface is raised, It becomes a cross-sectional shape with a width and depth that can be accommodated in a state where the flat tablet is standing upright in the middle part, and the wall surface on one side gradually falls to the outside and the width of the groove spreads to one side The depth of one side of the groove extending to the predetermined width gradually increases, and at the end on the second conveyor belt side, the bottom is almost flat and the depth that can be accommodated in a flat state in which the flat tablet is inverted 7. The outer shape of claim 6, wherein the outer shape changes into a deepened cross-sectional shape. Inspection equipment.

Images