JP2001039520A - X-ray foreign matter inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly convey an object to be inspected by a belt conveyor. SOLUTION: A meander prevention guide 15 provided on a belt 14 of a belt conveyor 10 is engaged with a slit 12 provided on a small diameter end of a belt roller 11 formed to a cone shape to restrict a deviation of the belt 14. A force is acted on the belt 14 in a direction S that it is about to move to a large diameter side of the belt roller 11. Thereby, a distortion and a disengagement are not generated on the belt 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter inspection apparatus for detecting foreign matter in an object to be inspected by using X-rays, and more particularly to a mechanism for transporting the object to be inspected.

[0002]

2. Description of the Related Art Conventionally, a foreign substance inspection using an X-ray foreign substance inspection apparatus has been performed in various fields such as raw meat and processed food. In a foreign substance inspection using X-rays, an X-ray source irradiates the inspection object with X-rays, and inspection of foreign substances contained in the inspection object is performed based on a transmission image obtained from transmitted X-rays transmitted through the inspection object. Is what you do. In this way, foreign substances (metals, bones, wood, synthetic resins, etc.) in raw meat and processed foods and foreign substances contained in pharmaceuticals are inspected, and an inspection object containing foreign substances is removed.

Conventionally, a belt conveyor including a belt provided with a meandering prevention guide and a cylindrical belt roller provided with a slit into which the meandering prevention guide is fitted has been used. As a result, the belt is likely to bend, and the object to be inspected is inclined or deviated, making it difficult to transport the object to be inspected normally.

For this reason, a crown-shaped belt roller 101 is used as shown in FIG. The applied force f acts to prevent the belt 102 from bending.

[0005]

However, in the above-described crown-shaped belt roller 101, when the center of the belt 102 is deviated from the center of the crown-shaped belt roller 101, the balance of the forces acting on the belt 102 is reduced. And the belt 102 easily shifts with respect to the roller 101.

Therefore, the center of the belt 102 and the roller 1
01 has to be held so as to always coincide with the center, and the position of the belt 102 with respect to the roller 101 has to be frequently adjusted.

An object of the present invention is to provide an X-ray foreign matter inspection apparatus which can solve the above problems and can smoothly transport an object to be inspected by a belt conveyor.

[0008]

In order to solve the above-mentioned problems, in the X-ray foreign matter inspection apparatus of the present invention, a meandering means provided on a belt of a belt conveyor for conveying an inspection object to an X-ray irradiation area is provided. Insert the guide for prevention into the slit provided at the small diameter side end of the conical belt roller,
In addition to restricting the belt from shifting, a force is applied to the belt from the portion in contact with the belt roller to the side opposite to the slit so that the belt does not bend.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration diagram of a roller,
FIG. 2 is a schematic configuration diagram of a belt conveyor using the rollers of the present embodiment, and FIG. 3 is a cross-sectional view of the vicinity of an X-ray irradiation unit of the X-ray foreign matter inspection device.

The belt roller 11 used in this embodiment is
As shown in FIG. 1, the member is a conical member, and a slit 12 is provided at a small-diameter side end. Further, as shown in FIG. 2, the belt conveyor 10 used in the present embodiment includes a belt roller 11, a cylindrical roller 13, and a belt 1.
The belt roller 11 is provided with a drive motor (not shown). Note that the drive motor may be attached to the cylindrical roller 13.

The belt roller 11 and the cylindrical roller 1
The slit 3 is provided with a slit 12, and a meandering prevention guide 15 provided on the back side of the belt 14 is inserted into the slit 12.

Further, as shown in FIG. 3, an X-ray source 16 and a line sensor 17 are arranged near the X-ray irradiating section, and a guide plate 18 for preventing the inspection object W from dropping.
Is provided. Such a guide plate for drop prevention 1
By providing a plurality of pieces 8 along the traveling direction of the belt 14, the inspection object W is reliably prevented from dropping.

Next, the operation of the X-ray foreign matter inspection apparatus according to this embodiment will be described. By actuating a drive motor (not shown), the belt roller 11 rotates. At this time, since the belt roller 11 has a conical shape, the larger the diameter of the cross section, the more the belt 14 is in contact with that portion.
, The belt 14 attempts to move in the direction of arrow S.

The belt 14 is provided with a meandering prevention guide 15 on the back side of the surface on which the inspection object W is placed, and the meandering prevention guide 15 is provided on the belt roller 11 in the slit 12. Therefore, even if the belt roller 11 rotates and tries to move in the direction of the arrow S, the movement is restricted. That is, a conical belt roller 11 and a slit 12
And the meandering prevention guide 15 cooperate to prevent the belt 14 from bending or shifting.

In this manner, the inspection object W is placed on the driven belt 14 which is prevented from being bent or displaced in the same manner as in the conventional inspection. X-rays are transmitted to the line sensor 1
7, and an X-ray fluoroscopic image is obtained. In addition, the fall prevention guide 15 is provided in some places along the belt 14, and the fall in the middle of conveyance is prevented.

In this embodiment, the conical belt roller 11 is used for only one of the pair of belt conveyor rollers, but the belt rollers 11 may be used for both sides.

[0017]

As described above, according to the present invention, since the belt does not bend or come off, the inspection object can be accurately conveyed to the X-ray irradiation area, and a stable X-ray fluoroscopic image can be obtained. Obtainable.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a configuration of a belt roller according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram illustrating a configuration of a belt conveyor according to an embodiment of the present invention.

FIG. 3 is a schematic sectional view in the vicinity of an X-ray irradiation region according to the embodiment of the present invention.

FIG. 4 is a schematic configuration diagram showing a configuration of a conventional belt roller.

[Explanation of symbols]

 Reference Signs List 10 belt conveyor 11 belt roller 12 slit 14 belt

Claims (1)

[Claims] 1. An X-ray foreign matter inspection apparatus for conveying an inspection object to an X-ray irradiation area by a belt conveyor having a plurality of belt rollers, wherein the belt roller is formed in a conical shape, and the belt roller is formed at a small diameter side end. An X-ray foreign matter inspection apparatus, further comprising a slit into which a meandering prevention guide provided on a belt of the belt conveyor is fitted.