JP6332727B2 - Inspected object conveying method of transmission type internal inspection device - Google Patents

Description

  The present invention relates to a method for controlling the posture of an object to be inspected in a detection range of a transmission line radiated from a radiation source in a transmission type internal inspection apparatus for conveying the object to be inspected on a belt conveyor.

  Conventionally, an inspection apparatus that uses transmission lines such as X-rays and microwaves in order to check the contamination of foreign matter inside the object to be inspected and to inspect the internal state of articles and the like contained in the object to be inspected. Is used.

  As a method of transporting the inspection object to the detection range of the transmission line, as in Patent Document 1, a transmission line generator (radiation source) that radiates the transmission line directly below and to transport the inspection object in the horizontal direction Many configurations are conveyed by a belt conveyor.

In such a transmission type internal inspection apparatus, in general, as the transmission distance between the radiation source and the object to be inspected is shorter, detection accuracy such as contamination and internal state inspection becomes higher and resolution is improved. In addition, the detection accuracy increases as the transmission line radiated from the radiation source and the inspection direction of the inspection object are closer to parallel.
In particular, when the object to be inspected is the size of a tablet, there is an object to be inspected that has only a few millimeters if the size of the object to be inspected is small. There may be a need.

Japanese Patent No. 3916843

However, in the case of a transport apparatus such as Patent Document 1, since the transmission line is irradiated radially from the radiation source, the shorter the transmission distance between the radiation source and the inspection object in order to increase the accuracy of the inspection, As shown in FIG. 9, the irradiation angle at which the transmission line is irradiated to the inspection object is such that the inspection object is conveyed directly below the radiation source as shown in FIG. Therefore, the irradiation angle differs depending on whether the beam is transported away from the radiation source in the main scanning direction, that is, the direction orthogonal to the transport direction.
Here, in the case of inspecting the internal structure of the inspection object having the shape shown in FIG. 9, for example, as shown in the figure, for example, two substances on a thin plate are vertically arranged separated by a predetermined interval inside the inspection object. In the case of FIG. 9A, the shape and the number of thin plates can be inspected with high accuracy, but in the case of FIG. Because it is irradiated at an angle, the inspection image may appear to overlap due to various factors such as the shape and spacing of the thin plates, or the image may become blurred. In some cases, only one thin plate is placed. There is a drawback that it is erroneously detected as if it were not done.
Therefore, in the transmission type internal inspection apparatus in which the belt of Patent Document 1 is transported by being driven horizontally, the detection accuracy is only within the range in which the inspection direction of the inspection object immediately below the radiation source is parallel to the transmission line. Can not be made, and the detection range is remarkably narrow with respect to the transmission range of transmission rays. For example, multiple-line conveyance that inspects multiple inspection objects such as tablets in parallel in the main scanning direction. Has a limit on the number of parallels. Further, the transmission type internal inspection apparatus has a drawback that the conveyance speed of the object to be inspected must be reduced in order to increase the detection accuracy.
For these reasons, the conveyance efficiency of the inspection object cannot be increased, and as a result, the inspection efficiency cannot be increased.

  The present invention has been made in view of the above problems, and in a transmission-type internal inspection device that conveys an object to be inspected on a belt conveyor, a belt when conveying the object to be inspected in a detection range of a transmission line radiated from a radiation source. By controlling the attitude of the inspection object, a method for conveying the inspection object is provided so that the transmission line radiated from the radiation source and the inspection direction of the inspection object are parallel to increase the inspection efficiency of the inspection object. For the purpose.

The present invention has been made to solve the above-described problems, and the invention according to claim 1 includes a belt conveyor that conveys an object to be inspected by a belt, and a belt guide that supports the belt along the belt. A radiation source that radiates a transmission line radially onto the inspection object conveyed by the belt conveyor, and a transmission that is provided at a position opposite to the radiation source and that is irradiated from the radiation source and transmitted through the inspection object. An inspection object conveying method of a transmission type internal inspection apparatus having a transmission line detector for detecting a line in a predetermined detection range, wherein the belt guide is used to detect the line in the detection range detected by the transmission line detector. However, within the detection range, the belt is inclined at a predetermined angle by being twisted about the central axis in the conveying direction while the cross section in the width direction of the belt is held flat. In the test object conveying method transmissive internal inspection apparatus characterized by controlling the orientation of the belt conveyor such that the test direction of the inspection object being conveyed and the transmission line becomes parallel by the belt conveyor is there.

The invention according to claim 2, wherein the belt conveyor is arranged in a plurality parallel with the main scanning direction of the transmission line detectors, each belt guide for supporting and along each belt of each belt conveyor is respectively The belts inclined at a predetermined angle and supported along the belt guides are inclined at a predetermined angle, and the inspection direction of the inspection object conveyed by the belt conveyors and the transmission line are parallel to each other. the so that the inspected object conveyance method transmissive internal inspection apparatus according to claim 1, wherein the controlling the posture of each belt conveyor.

According to a third aspect of the present invention, there is provided a suction hole for sucking the inspection object by sucking air at a predetermined position of the belt, and the belt guide has the suction hole of the belt. A suction slit for adsorbing the inspection object is provided at a position corresponding to the inspection object, and the inspection object is placed on the belt through the suction hole of the belt by sucking air. which is the inspection object conveying method transmissive internal inspection apparatus according to claim 1 or 2, characterized in that conveying is adsorbed to the belt.

According to a fourth aspect of the present invention, a belt suction slit for sucking the belt itself is provided in the belt guide, and the belt guide sucks the belt to the belt guide to suck the belt. It is along the shape of a belt guide, It is a to-be-inspected object conveyance method of the transmission type internal inspection apparatus of any one of Claims 1-3 characterized by the above-mentioned.

The invention described in Claim 5, in any one of claims 1 to 4, characterized in that a pocket for placing the object to be inspected in a predetermined position of the belt is provided with It is a to-be-inspected object conveyance method of the transmissive | pervious internal inspection apparatus of description.

The invention according to claim 6 controls the attitude of the transmission line detector so that the detection direction of the transmission line detector, the inspection direction of the inspection object, and the transmission line are parallel to each other. It is a to-be-inspected object conveyance method of the transmission type internal inspection apparatus of any one of Claims 1-5 characterized by the above-mentioned.

According to the first aspect of the present invention, a belt conveyor that conveys the object to be inspected by a belt, a belt guide that supports the belt along the belt, and the inspection object that is conveyed by the belt conveyor is irradiated with transmission rays radially. Transmission internal inspection comprising a radiation source and a transmission line detector provided at a position opposite to the radiation source and detecting a transmission line irradiated from the radiation source and transmitted through the inspection object within a predetermined detection range In the inspection object transport method of the apparatus, in the detection range detected by the transmission ray detector, the belt guide holds the belt in a flat cross section in the width direction within the detection range. The belt is inclined at a predetermined angle by being twisted about the central axis of the conveyance direction, and the inspection direction of the inspection object conveyed by the belt conveyor An inspection object conveying method transmissive internal inspection device serial and transmission line and controls the posture of the belt conveyor so as to be parallel, the transmission line and the belt and the object to be inspected in the detection range Since the belt is inclined so that the directions are parallel, the accuracy of inspection in the main scanning direction of the belt is dramatically improved. For example, even if a plurality of small inspection objects such as tablets are arranged in parallel, Since a highly accurate inspection result can be obtained even at the position, there is an advantage that the number of inspections per unit time can be significantly increased. In addition to checking for the presence of foreign matter inside the inspection object, the inspection of the shape and number of substances contained in the inspection object is reliable regardless of whether it is directly under the transmission line or separated in the main scanning direction. There are advantages that can be made. Further, there is an advantage that a belt guide for supporting the belt along the belt is provided, and the belt is supported by the belt guide and can be reliably tilted. Further, since the belt is twisted about the central axis of the belt, the belt can be tilted with a smaller twisting force than when the belt is twisted about the end side of the belt. In addition, when the inspection object is conveyed at the center of the belt, the external force received by tilting can be reduced, which has the advantage of stabilizing the posture during conveyance. In addition, the tilt angle can be controlled without twisting by twisting.

In the invention of claim 2, wherein the belt conveyor is arranged in a plurality parallel with the main scanning direction of the transmission line detectors, wherein each belt guide each inclined at a prescribed angle for supporting and along the respective belts each belt conveyors The belts supported along the belt guides are inclined at a predetermined angle, and the inspection direction of the inspection object conveyed by the belt conveyors is parallel to the transmission line. 2. The method for conveying an inspection object of a transmission type internal inspection device according to claim 1 , wherein the posture of each belt conveyor is controlled, and a plurality of belt conveyors are arranged in parallel to optimize each belt. By controlling and transporting to a stable tilt angle, the posture of the inspection object can be ensured, and for example, inspection can be performed simultaneously without mixing different types of inspection objects. Rukoto also becomes possible.

According to a third aspect of the present invention, a suction hole for sucking the object to be inspected by sucking air at a predetermined position of the belt is provided, and the belt guide has a position corresponding to the suction hole of the belt. A suction slit for adsorbing the inspection object is provided on the belt, and the inspection object placed on the belt through the suction hole of the belt is sucked into the belt by the suction slit. 3. A method for conveying an inspection object of a transmission type internal inspection apparatus according to claim 1, wherein the inspection object is conveyed by adsorbing the inspection object to a belt. There are advantages that can be made.

According to a fourth aspect of the present invention, the belt guide is provided with a belt suction slit for adsorbing the belt itself, and the belt guide adsorbs the belt to the belt guide to form the belt guide. 4. The method for conveying an object to be inspected in a transmission type internal inspection device according to claim 1 , wherein the belt itself is adsorbed by a belt guide when the belt is inclined. As a result, the posture control of the belt is ensured, and there is an advantage that the parallelism with the transmission line can be reliably maintained.

In the invention of claim 5, transmission type according to any one of claims 1 to 4, characterized in that a pocket for placing the object to be inspected in a predetermined position of the belt is provided with This is a method for transporting an object to be inspected by an internal inspection apparatus, and can be reliably transported and inspected by placing the object to be inspected one by one or a predetermined number in a pocket.

According to a sixth aspect of the present invention, the attitude of the transmission line detector is controlled such that the detection direction of the transmission line detector, the inspection direction of the inspection object, and the transmission line are parallel to each other. Item 6. The inspection object transport method of the transmission type internal inspection device according to any one of Items 1 to 5 , wherein not only the inspection direction of the inspection object and the transmission line are parallel, but also the transmission line detector is transmitted. Since it is parallel to the line, a more reliable inspection result can be obtained.

1 shows an overall schematic view of a transmission type internal inspection apparatus according to the present invention. The belt part of the belt conveyor of the transmission type internal inspection apparatus which concerns on this invention is shown. (A) is a plan view, (b) is a side view, (c) is a CC sectional view in (b), (d) is a DD sectional view in (b), and (e) is in (b). EE sectional drawing, (f) shows a perspective view. A part of 1st Example of the belt used for the belt conveyor which concerns on this invention, and a belt guide is shown. (A) is a plan view, (b) is a side view, (c) is an AA cross-sectional view in (a), and (d) is a BB cross-sectional view in (b). FIG. 2 shows a partial view of the conveying state of the first embodiment of the belt and belt guide used in the belt conveyor according to the present invention. A part of 2nd Example of the belt and belt guide which are used for the belt conveyor which concerns on this invention is shown. (A) is a perspective view which shows a structure, (b) is a perspective view at the time of arrange | positioning (a), (c) shows sectional drawing. A part of 3rd Example of the belt and belt guide which are used for the belt conveyor which concerns on this invention is shown. (A) is a plan view, (b) is a side view, (c) is an AA sectional view in (a), (d) is a BB sectional view in (b), and (e) is a perspective view. . A part of 4th Example of the belt used for the belt conveyor which concerns on this invention, and a belt guide is shown. (A) is sectional drawing, (b) shows a perspective view. The conceptual diagram of the test | inspection image by the conveyance method of the belt conveyor of the transmission type internal inspection apparatus which concerns on this invention is shown. The conceptual diagram of the test | inspection image in a prior art is shown.

An inspection object conveying method of a transmission type internal inspection apparatus according to the present invention will be described with reference to the drawings. 1 is a schematic diagram of a transmission type internal inspection device, FIG. 2 is a schematic diagram of a belt portion of a belt conveyor, FIGS. 3 to 7 are diagrams showing an embodiment of a belt and a belt guide, and FIG. 8 is a transmission type according to the present invention. The conceptual diagram of the test | inspection image by the conveying method of the belt conveyor of an internal test | inspection apparatus is shown.
The transmission type internal inspection apparatus 10 includes a hopper 11 that supplies an inspection object T, a feeder 12, an alignment supply unit 13, a belt conveyor 20, an inspection unit 30, and a sorting unit 40. In this embodiment, the posture of the belt conveyor 20 is controlled with the side direction of the tablet to be inspected T as the inspection direction.

  In this embodiment, the transmission line of the transmission type internal inspection apparatus 10 uses X-rays, and the inspection object T shows an embodiment in which tablets are used. However, the present invention is not limited to this. It may be a microwave or the object to be inspected may be a small electronic component.

  As an inspection procedure of the transmission type internal inspection apparatus 10, referring to FIG. 1, first, the inspection object T is supplied to the hopper 11, and the inspection object T is aligned by the feeder 12 and the alignment supply unit 13. The inspection object T is supplied to a predetermined position 20, the inspection object T is conveyed by the belt conveyor 20, and passes through the inspection unit 30 having the radiation source 31 and the transmission line detector 32. The internal state of the inspection object T is inspected and sorted into a non-defective product chute 41 and a defective product chute 42 provided in the sorting unit 40. The sorting unit 40 may be provided with an uninspected chute for sorting uninspected products. The transmission line detector 32 may be installed horizontally and inspected by correcting the detection result. The detection direction of the transmission line detector 32, the inspection direction of the inspection object T, and the transmission line A You may arrange | position so that it may become parallel.

  As shown in FIG. 2, the belt conveyor 20 includes a plurality of endless belts 21 arranged in parallel in a direction perpendicular to the transport direction, that is, in the main scanning direction. The belt 21 supports the belt 21 on the lower surface of each belt 21. Belt guides 22 are provided, and all belts 21 are simultaneously driven by rollers 23 as shown in FIG.

The belt 21 is formed of a flexible rubber material, and can be twisted in the width direction (short direction) of the belt.
The belt 21 is provided with a suction hole 21a at a predetermined position and a suction slit 22a at a position corresponding to the suction hole 21a of the belt 21 as in the first embodiment of FIGS. 22 is supported in close contact with the lower surface of the belt 21. When the suction slit 22a is negatively charged by a pump (not shown), air is sucked through the suction hole 21a as shown in FIG. 3D, and the object T to be in contact with the upper part of the suction hole 21a is attached to the belt. 21 is adsorbed.
2 and 4, the belt 21 is inclined so that the belt guide 22 is twisted so that the transmission line A from the radiation source 31 and the inspection direction of the inspection object T are parallel in the inspection range B. The belt 21 is controlled to be inclined so that the belt 21 is also twisted by being supported by the belt guide 22 from the lower surface.
Here, since the central axis of the twist of the belt 21 is configured to be coaxial with the central axis of the belt 21 in the conveying direction, the belt 21 is not easily subjected to a load due to the twist. This can contribute to extending the life of the belt. Furthermore, when the inspection object T is conveyed at the center of the belt 21, the external force received by the inclination of the inspection object T can be reduced, which has the advantage of stabilizing the posture during conveyance.

  When the belt 21 is twisted only in the inspection range as shown in FIGS. 2 and 4, it is possible to control a plurality of belts 21 arranged at the end of the belt conveyor 20 without any level difference. There is an advantage that the discharge mechanism is simple and the process can be surely shifted to the next step. Further, if the roller 23 is provided at the end of the belt conveyor 20 as shown in FIG. 1, it is possible to drive all the belts 21 at the same time, thereby reducing the number of components of the apparatus. . If it is desired to control the conveyance of the individual belts 21 separately, it is only necessary to provide separate rollers 23 for each belt and drive them.

  Further, as in the second embodiment of FIG. 5, not only the suction slit 22 a for attracting the inspection object T to the belt guide 22, but also the belt 21 itself is attracted to the belt guide 22 to follow it. Providing the suction slit 22b has an advantage that the posture control of the inclination during the conveyance of the belt 21 is ensured, and thereby the parallelism with the transmission line can be reliably maintained.

  Further, as in the third embodiment of FIG. 6, a wall 21b in which the belt 21 has a pocket shape may be provided, and the inspection object T may be accommodated and transported in the pocket portion. In this case, it is preferable that the shape of the wall is not hindered when the belt 21 is twisted. For example, a notch may be provided in a part of the wall 21b so that the stress generated when the belt 21 is twisted is released. The position of the inspection object T in the portion where the belt 21 is twisted is usually conveyed in contact with the wall 21b as in the inspection object T on the right side of FIG.

Note that the pocket-shaped belt 21 also has a structure in which a suction hole is provided so that the inspection object T is attracted to the belt, so that the inspection object T can be conveyed more reliably.
In addition, the structure of the wall 21b is not limited to the example of FIG. 5, and it is sufficient that the inspection object T can be reliably conveyed, so that the lower wall does not shake off the inspection object T in the twisted portion (inspection range). For example, only the lower wall has a U-shape, or a tunnel-shaped guide may be newly disposed only in a portion where the belt 21 is twisted.

  Further, as shown in the fourth embodiment of FIG. 7, a single wide belt 21 is inclined so as to bend, and a plurality of inspection objects T are conveyed in parallel, and the inspection direction and transmission of the inspection object T are transmitted. A conveying method in which the line A is parallel may be used. As a matter of course, a belt guide 22 may be provided so as to support the belt 21 and conveyed. In the embodiment of FIG. 7, the inspection direction is the inspection surface with the upper surface of the tablet as the inspection object T being the inspection surface.

  When a transport method in which the inspection direction of the inspection object T and the transmission line A are parallel in the inspection range as in this embodiment, 2 substances on the thin plate are present inside the inspection object T as shown in FIG. When the shape, the number, and the interval of the thin plates are inspected vertically while being separated by a predetermined interval, the inspection direction of the inspection object T and the transmission line A are parallel, so that the internal substances overlap. Therefore, there is an advantage that an accurate inspection can be performed because the image does not appear or become blurred, and the occurrence of defective products due to an erroneous inspection of the inspection apparatus can be reduced.

  The inspection object conveying method of the transmission type internal inspection apparatus according to the present invention can accurately inspect not only the detection of foreign matter inside the inspection object but also the shape and number of the internal components.

A Transmission line B Inspection range T Inspected object 10 Transmission type internal inspection device 11 Hopper 12 Feeder 13 Alignment supply unit 20 Belt conveyor 21 Belt 21a Suction hole 22 Belt guide 22a Suction slit 22b Suction slit 30 Inspection unit 31 Radiation source 32 Transmission line detector 40 Sorting unit 41 Good product chute 42 Defective product chute

Claims (6)

A belt conveyor that conveys the object to be inspected by a belt; a belt guide that supports the belt along the belt; a radiation source that radiates transmission lines radially to the object to be inspected conveyed by the belt conveyor; And a transmission line detector for detecting a transmission line irradiated from the radiation source and transmitted through the inspection object within a predetermined detection range. Because
In the detection range detected by the transmission line detector, the belt is twisted about the central axis in the transport direction while the belt is held flat by the belt guide within the detection range. The belt is inclined by a predetermined angle, and the attitude of the belt conveyor is controlled so that the inspection direction of the inspection object conveyed by the belt conveyor and the transmission line are parallel to each other. Inspected object transport method for internal inspection equipment. It said belt conveyor is arranged in a plurality parallel with the main scanning direction of the transmission line detectors, wherein each belt guide for supporting and along each belt of each belt conveyor is inclined at a predetermined angle, respectively, the each belt guide The belt conveyors are inclined at a predetermined angle, and the posture of the belt conveyors is set so that the inspection direction of the inspection object conveyed by the belt conveyors and the transmission line are parallel to each other. 2. The inspection object conveying method of the transmission type internal inspection apparatus according to claim 1 , wherein the inspection object is conveyed. A suction hole for sucking the object to be inspected by sucking air at a predetermined position of the belt is provided, and the belt guide sucks the object to be inspected at a position corresponding to the suction hole of the belt. A suction slit is provided, and when the suction slit sucks air, the inspection object placed on the belt is adsorbed to the belt and conveyed through the suction hole of the belt. 3. A method for transporting an object to be inspected by a transmission type internal inspection apparatus according to claim 1 or 2 . A belt suction slit for adsorbing the belt itself is provided in the belt guide, and the belt guide adsorbs the belt to the belt guide to conform to the shape of the belt guide. The inspection object conveying method of the transmission type internal inspection device according to any one of claims 1 to 3 . The inspection object of the transmission type internal inspection apparatus according to any one of claims 1 to 4 , wherein a pocket for placing the inspection object is provided at a predetermined position of the belt. Transport method. Any one of the preceding claims, characterized in that to control the attitude of the transmission line detectors of the detection direction and the test direction of the inspection object and the transmission line and said transmission line detectors in parallel 2. A method for conveying an object to be inspected in a transmission type internal inspection apparatus according to item 1.