JP2003121387A - X-ray foreign-matter inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray foreign-matter inspection device having a door that makes a belt conveyor easily maintainable for an X-ray leakage preventing hood. SOLUTION: When the handle 13 of the door 6 is pulled up, links 10 and 11 are swung by means of their spindles. When the links 10 and 11 are swung, the door 6 opens a hood 2, but the door 6 and links 10 and 11 stop at the moment when the upper end of the door 6 touches the lower end of a stopper 12. When the door 6 is fully opened in this way, the whole upper surface of the belt conveyer 4b is completely exposed and cleaning and other maintenance work can be performed on the conveyer 4b.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a foreign matter inspection apparatus for inspecting foreign matter contained in an object to be inspected by using X-rays, and particularly to prevention of X-ray leakage. For a door formed in a hood for a vehicle. 2. Description of the Related Art Foreign matter inspection using X-rays is useful in various fields, but particularly in the meat processing and food processing industries.
A foreign substance inspection device is important as a management measure for the manufacturing process of the PL method or the HACCP method. The X-ray foreign matter inspection apparatus irradiates an inspection object with X-rays from an X-ray source and transmits X-rays transmitted through the inspection object.
Inspection of a foreign substance contained in the inspection object is performed by a transmission image obtained from the line. This enables detection and removal of contaminants such as metals, bones, wood, synthetic resin, etc., which are foreign substances in meat or processed foods. Needless to say, it must be excellent in safety and hygiene. FIGS. 3 and 4 are schematic views showing a conventional X-ray foreign matter inspection apparatus 1. FIG. In such an apparatus, the X-ray irradiation area including the X-ray generator 3 and the transmitted X-ray detector 7 is covered with a hood 2 for preventing X-ray leakage, and the inspection object 5 is a belt conveyor 4a, 4b, 4c. , And is carried in and out of the X-ray irradiation area by horizontal movement. A door 6 is formed on the hood 2 for device maintenance, so that access to the belt conveyor and attachment and detachment of the belt conveyor 4b can be easily performed. Heretofore, several methods have been adopted as the door opening / closing structure. (A) shown in FIG.
(B), (c) and (d) and (e) shown in FIG. 4 simply show these. (A) in each figure,
(B), (c), (d) and (e) are front views,
(A '), (b'), (c '), (d'), and (e ') are views of the X-ray foreign substance inspection device 1 from the side, and the door 6
The opening / closing operation of is shown. That is, (a) shown in FIG.
The door 6 is divided into right and left at the center, and hinges are provided on each of the right and left doors to form a double door system. It is. 4C shows a hinge provided on the lower surface of the door 6 so that the door 6 can be tilted forward by 90 degrees using the hinge as a fulcrum, and FIG. 4D shows a door similar to FIG. 6 is a system in which the door 6 is opened so as to fall forward by 180 degrees, and (e) is a system in which the door 6 is pulled down and opened by a parallel link mechanism. [0005] However, the above 5)
Each of the methods (a) to (e) has a problem. That is, in the two-way system (a), (a ') and the one-sided system (b), (b'), the structure of the fulcrum of the door 6 becomes an obstacle, and the length exceeds the width of the hood 2 for preventing X-ray leakage. When the belt conveyor 4b is mounted on the apparatus, it cannot be easily attached and detached. In addition, the front 90-degree opening method (c),
In the case of (c ′), since the opening of the door 6 stops at 90 degrees,
It is necessary to always access the belt conveyor 4b from a position where the height of the door 6 is separated, which has a drawback of poor operability. In addition, particularly in the inspection of foreign substances in food, the belt conveyor 4b is frequently cleaned. However, at this time, there is a problem that dirt scraped from the belt conveyor 4b adheres to the inner surface of the door 6. Further, in the case of the opening method (d) or (d ') 180 degrees below the front side, the height of the upper surface of the belt conveyor 4b is normally set to about 750 mm from the floor surface. In opening and closing the door 6, it is necessary to work by changing the door knob, and the operator is forced to become stiff every time the door 6 is opened and closed. Further, in the case of the pulling-down methods (e) and (e ') using the parallel link mechanism,
As in (c), when the belt conveyor 4b is cleaned, the door 6 is easily stained, and the stain is easily fixed to the upper surface of the door 6, and the stain falls on and adheres to the inner surface of the door 6, so that cleaning is difficult. There is a problem with maintenance and hygiene. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a door having a hygienic structure corresponding to an object to be inspected for food, and which can easily maintain a belt conveyor. Having X in the hood for preventing X-ray leakage
It is an object to provide a line foreign matter inspection device. [0008] In order to achieve the above object, an X-ray foreign matter inspection apparatus according to the present invention comprises a door of a hood for preventing X-ray leakage, a fixed part in the apparatus body and a pair of doors. With a parallel link mechanism consisting of inclined links
The parallel link mechanism is arranged above a belt conveyor installed in the hood, and is configured to be inclined so that the door is positioned below the fixed portion so that the door closes the hood. Therefore, the door opens the hood due to the upward swing of the parallel link mechanism. An embodiment of the present invention will be described below with reference to FIG. FIG. 1A is a diagram showing the X-ray foreign matter inspection apparatus 1 from the front, and FIG. The entire apparatus is covered by a hood 2 made of an X-ray blocking material to prevent leakage of X-rays to the outside of the apparatus. An X-ray generator 3 for irradiating X-rays is housed in the upper part of the inside, and irradiates the inspection object 5 carried into the apparatus by the operation of the belt conveyor 4b. The irradiated X-ray is transmitted X-ray detector 7
Is detected, a detection signal is sent to an external output device, and predetermined image processing is performed based on the detection signal. For example, processing such as marking a foreign substance is performed. The attachment / detachment of the belt conveyor 4b into / from the hood 2 is performed via the door 6. Also, during maintenance such as cleaning of the belt conveyor 4b, the door 6 is opened and closed each time to perform cleaning and the like. That is, the door 6 has a fixing portion 8, while the fixing portion 9 is disposed above the hood 2. The two fixed portions 8 and 9 are connected by a pair of parallel link mechanisms including links 10 and 11. This parallel link mechanism is inclined forward and rearward and rearward, and is disposed above the belt conveyor 4b.
The lower line of the door 6 is below the lower line of the belt conveyor 4b. Therefore, the door 6 is displaced upward in an arc shape on the front wall surface of the hood 2 to open the hood 2. 1
Reference numeral 4 denotes rubber goodwill containing lead. Next, the operation of the X-ray foreign matter inspection apparatus 1 in this embodiment will be described with reference to FIGS. 1 (a) and 1 (b). First, the inspection object 5 is prepared outside the apparatus, and is carried in from the belt conveyor 4a communicating with the belt conveyor 4b in the apparatus. The carried inspection object 5 is transferred into the apparatus and passes through an X-ray irradiation area irradiated by the X-ray generator 3. When the X-ray is irradiated on the inspection object 5, scattered X-rays are generated in each direction due to the shape and characteristics of the inspection object 5, but are blocked by the hood 2. The X-ray transmitted through the inspection object 5 is incident on the transmitted X-ray detector 7, and the transmitted X-ray detector 7 outputs a detection signal to an external image processing device (not shown). The image processing device processes the signal and outputs the image data.
Output to a T device or the like to display an image. The inspection object 5 that has passed through the X-ray irradiation area follows the flow of the belt conveyor 4b and is carried out of the apparatus. Cleaning of the belt conveyor 4b during operation is performed by opening a door 6 formed on the hood 2. When the handle 13 of the door 6 is pulled up, the links 10 and 11 swing by their respective pivots. This swing causes the door 6 to open the hood 2, but when the upper end of the door 6 abuts on the lower end of the stopper 12, the door 6 and the links 10, 11 stop. When the door 6 is fully opened in this manner, the entire surface of the belt conveyor 4b is exposed without obstruction, and cleaning and other maintenance can be performed. FIG. 2 shows a state in which the door 6 of the hood 2 is opened. At the time of closing, when the handle 13 is pulled down, the door 6 swings downward by the respective support shafts of the links 10 and 11, disengages from the stopper 12, and is displaced downward to close. Therefore, the door 6 is moved by the parallel link mechanism.
Closes the front surface of the belt conveyor 4b, and the X-ray blocking mechanism in the hood 2 functions again. The X-ray foreign matter inspection apparatus provided by the present invention is as described above, but is not limited to the above and illustrated examples, and various modifications can be made. First, in this embodiment, the parallel link mechanism is provided on the left and right sides of the door, but may be provided only on one side, and the upper fixing portion is provided outside the hood, but may be provided inside the apparatus main body. . In addition, this fixing portion is not limited to being provided on the hood, and may be installed on another fixing portion of the apparatus. Further, when the door is fully opened, it is safer to provide a fall prevention mechanism such as projecting a hook to prevent the door from falling downward. It is also possible to adopt a system in which the fall prevention is automatically activated at the same time when the door is fully opened. The X-ray foreign substance inspection apparatus of the present invention has the above-described configuration, so that even if food or the like is an inspection object, maintenance of the belt conveyor can be easily performed. The cleaning operation is easy and sanitary, and even when the operation is frequent, the operation can be performed with less labor, the efficiency of the inspection operation can be increased, and the operation rate can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an embodiment of an X-ray foreign matter inspection apparatus according to the present invention, wherein (a) is a front view and (b) is a view seen from a side. FIGS. 2A and 2B are diagrams showing a state in which a door of an embodiment of the X-ray foreign matter inspection apparatus according to the present invention is opened, wherein FIG. 2A is a front view and FIG. FIG. 3 is a view showing a conventional X-ray foreign matter inspection apparatus, and FIG.
(C) is a front view, (a ')-(c') is a diagram viewed from the side, showing the opening and closing operation of the door. FIG. 4 is a view showing a conventional X-ray foreign matter inspection apparatus, and FIG.
(E) is a front view, (d ')-(e') is a diagram viewed from the side, showing the opening and closing operation of the door. [Description of Signs] 1 X-ray foreign substance inspection apparatus 2 hood 3 X-ray generators 4 a, 4 b, 4 c belt conveyor 5 inspection object 6 door 7 transmitted X-ray detector 8, 9 fixed part 10, 11 ... Link

Claims (1)

Claims: 1. A hood for blocking X-rays, and an X-ray provided in the hood for irradiating X-rays and inspecting the inspection object for foreign substances.
X-ray inspection mechanism, a belt conveyor for carrying in and out the object to be inspected into and out of the X-ray irradiation area, and an X-ray foreign matter inspection apparatus including a belt conveyor maintenance door formed on the hood,
A support shaft fixed to the upper part of the apparatus body and the support shaft fixed to the door body are connected by a parallel link mechanism including a pair of inclined links, and the support shafts are located above the belt conveyor. An X-ray foreign matter inspection apparatus characterized in that the hood is opened by positioning the door and displacing the door upward.