JP2000074856A - Foreign matter inspecting device using x-rays - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the leakage of scattered X-rays, and to smoothly convey a specimen. SOLUTION: In this inspecting device, an X-ray generator 1 is stored inside a hood 2 to shield scattered X-rays S, a specimen W is carried in by a second belt 4b substantially vertically with respect to the first belt 4a passing through an X-ray irradiating region to move horizontally when the specimen W is carried in the X-ray irradiating region from the X-ray generator 1 stored inside the hood 2, the specimen W is carried out by a first belt 4a-a third belt 4c substantially vertically, and a conveyer belt 4 comprising the first-third belts 4a-4c is stored inside a hood 5, to shield the scattered X-rays S.

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 inspection object using X-rays, and relates to prevention of X-ray leakage.

[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.

FIGS. 3 and 4 are schematic views showing an example of a belt conveyor used in a conventional X-ray foreign matter inspection apparatus. Fig. 3 shows that the object to be inspected is carried in and out of the X-ray irradiation area by a conveyor by horizontal movement, but the X-ray generator is housed inside, and the entrance to the hood that shields leaked X-rays has a lead. Rubber blinds are hanging down to shield leaked X-rays.
FIG. 4 shows a belt conveyor for carrying in / out an object to be inspected, which is provided with an inclined portion so that scattered X-rays from the X-ray irradiation area do not leak directly from the entrance of the hood. .

[0004]

However, in the apparatus as shown in FIG. 3, it is necessary to push up the lead blinds and carry the object to be inspected into the shielded area. In some cases, the inspection object was returned and moved on the belt, and the lead blind could not be pushed up, so that the inspection object was not conveyed. In particular, in the case of a light inspection object such as food, such a phenomenon occurred remarkably. Further, the apparatus shown in FIG. 4 has a problem that the object to be inspected slides on the inclined belt and is not conveyed.
An object of the present invention is to solve such a problem, prevent leakage of scattered X-rays, and lubricate the transfer of an inspection object by a belt conveyor.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an X-ray inspection apparatus for inspecting an inspection object by X-rays. When the inspection object is carried into the X-ray irradiation area from the X-ray generator housed in the hood while shielding the leaked X-rays, the first belt that moves horizontally through the X-ray irradiation area On the other hand, the inspection object is carried in substantially vertically by the second belt, and the inspection object is carried out substantially vertically by the third belt from the first belt.
A belt conveyor consisting of a belt is stored inside the hood,
It is characterized in that leaked X-rays are shielded.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIG.
This will be described with reference to a schematic configuration diagram of FIG. FIG. 1A is a plan view of the X-ray inspection apparatus, and FIG. 1B is a front view thereof.

The X-ray tube 1 that irradiates the inspection object W with X-rays for inspection uses X-rays that leak to the outside such as scattered X-rays S (leakage X-rays).
In order to shield the wire (wire), it is housed in a hood 2 made of a shielding member. Further, a line sensor 3 for detecting an X-ray transmitted through the inspection object W is also arranged in the hood 2. The belt conveyor 4 for transporting the inspection object W is also disposed in the hood 2 and the hood 5 so that the inspection object W is irradiated with the inspection X-rays and also shields the scattered X-rays S generated. ing.

Further, in this embodiment, by changing the direction in which the inspection object W passes through the X-ray irradiation area and the direction in which the inspection object W enters and exits the hood 5, the entrance and exit 6 of the inspection object W can be changed.
7 is configured such that the X-ray irradiation area cannot be directly seen through. Specifically, for the belt conveyor 4,
By changing the traveling direction of the second belt 4b on the entrance 6 side of the inspection object by 90 degrees by the curved portion 4d, the direction is changed to the direction of the first belt 4a passing through the X-ray irradiation area and further passing through the X-ray irradiation area. The traveling direction of the third belt 4c on the exit 7 side of the inspection object W is changed by 90 degrees with respect to the direction of the first belt 4a by the curved portion 4e. The belt conveyor 4 is surrounded by the hood 2 and the hood 5 over the entire area.

Next, the operation of the X-ray inspection apparatus according to the present embodiment will be described. First, the inspection object W is moved to the second side on the entrance side.
Put on the belt 4b. The inspection object W is firstly the second belt 4b.
, And reaches the first belt 4a via the curved portion 4d. Then, the inspection object W advances on the first belt 4a and passes through the X-ray irradiation area. At this time, the X-ray transmitted through the inspection object W is detected by the line sensor 3 disposed below the X-ray irradiation area. By performing predetermined image processing based on the detection signal from the line sensor 3, a foreign substance inspection of the inspection object W is performed.

When the X-ray is irradiated on the inspection object W, the scattered X-ray S
The scattered X-rays S are generated in various directions, but the hood 5 shields the belt conveyor 4 from the X-ray irradiation area so that the entrances 6 and 7 of the inspection object W cannot be seen. Therefore, the scattered X-rays S do not leak directly from the entrances 6 and 7 of the inspection object W to the outside.

Then, the inspection object W that has passed through the X-ray irradiation area reaches the third belt 4c via the curved portion 4e.
Further, the inspection object W is conveyed by the third belt 4c, reaches the outlet 7, and is taken out.

The inlet 6 and the outlet 7 when the inspection object W is conveyed by the belt conveyor 4 may be on the same side of the apparatus as in the above-described embodiment, or shown in FIG. As such, they may be provided on opposite sides. These may be selected in consideration of the layout of the present apparatus.

[0013]

As described above, according to the present invention, a hood composed of a shielding member surrounds a belt conveyor for transporting an object to be inspected and faces an X-ray irradiation area directly from an entrance of the object to be inspected. In each of the entrance side and the exit side, the traveling direction of the belt is orthogonal to the direction passing through the X-ray irradiation area, so that it is possible to prevent the leakage X-ray that leaks directly to the outside. At the same time, the inspection object can be smoothly transported.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a configuration of a modified example (1) of the present invention.

FIG. 3 is a schematic configuration diagram showing a conventional configuration (1).

FIG. 4 is a schematic configuration diagram showing a conventional configuration (2).

[Explanation of symbols]

 1 X-ray generator 2, 5 hood 4 Belt conveyor 4a, 4b, 4c Belt

Claims (1)

[Claims] 1. An X-ray inspection apparatus for inspecting an inspection object using X-rays, wherein a hood for accommodating an X-ray generator to shield leaked X-rays and an X-ray irradiation area for the inspection object. A first conveyor that moves horizontally through the X-ray irradiation area, a second belt that carries the inspection object substantially perpendicular to the first belt, and a first An X-ray foreign matter inspection apparatus comprising: a third belt that vertically carries out an object to be inspected; and a belt conveyor housed in a hood.