JP2002139597A - Aperture device with aiming device for X-ray irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diaphragm device equipped with a sighting unit for X-ray irradiation equipment capable of adjusting a diaphragm without requiring the preparation of a number of diaphragms for replacement and dispensing with the movement of the sighting unit. SOLUTION: This diaphragm device with a sighting unit 10 comprises a diaphragm device 20 provided on a fixed frame having an irradiation port 12 mounted on an irradiation part of X-ray irradiation equipment, the device 20 being formed of a vertical diaphragm mechanism 21B capable of opening and closing the irradiation port 12 by the interlocking of a pair of diaphragm plates 22 and a lateral diaphragm mechanism 21H orthogonal thereto, and the sighting unit 30 provided on the side part of the fixed frame 11, the sighting unit 30 being formed of a Y-axial laser projector 31Y for emitting laser beams in a flat shape including the center of the irradiation port 12 and an X-axial laser projector 31X for emitting laser beams orthogonal to the laser beams by the Y-axial laser projector 31 in a flat shape including the center of the irradiation port 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm device with an aiming device for an X-ray irradiator in a nondestructive inspection using X-rays.

[0002]

2. Description of the Related Art As a nondestructive inspection using X-rays, there is a method in which an X-ray film is arranged behind a flaw detection site, the site is irradiated with X-rays from the front side, and a transmitted X-ray image is taken. .

In an X-ray irradiator used for such a nondestructive inspection, as shown in FIG. 4 which is a conceptual diagram, an irradiation port of an X-ray irradiator 41 is illuminated so that X-rays are irradiated only to a portion to be inspected. An aperture 42 is attached to the site. The aperture 42 is prepared in various aperture sizes, and an appropriate aperture is selected and used according to the inspection object. In the drawing, reference numeral 43 denotes a subject, and 44 denotes an X-ray film.

[0004] Further, unless X-rays from the X-ray irradiating device 41 are irradiated at right angles to the subject 43 and the X-ray film 44, good imaging cannot be obtained.
1. It is necessary to arrange the subject 43 and the X-ray film 44 on a straight line.

Therefore, as shown in FIG. 4A, an aiming device 45 using a laser beam is provided on the front surface of the X-ray irradiation device 41.
The aiming device 45 emits a linear laser beam coincident with the X-ray optical axis of the X-ray irradiator, and aims at the center position of the irradiation.

Such an aiming device 45 is supported, for example, via an articulated arm 46, and can be positioned on the front surface of the X-ray irradiating device 41 so that its laser light coincides with the X-ray optical axis during aiming work. At the same time, at the time of imaging, as shown in FIG. 4B, it is possible to retreat from the X-ray irradiation area.

[0007]

However, the conventional X-ray irradiator as described above is extremely troublesome because a large number of apertures must be prepared and exchanged according to the object. .

In addition, since the aiming device must be positioned in front of the X-ray irradiator to aim and retreat at the time of photographing, there is a problem that the aiming operation is troublesome and the photographing fails if the person forgets to retreat. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides a large number of apertures so that the apertures can be adjusted without the need for replacement. An object of the present invention is to provide a diaphragm device with a sighting device for an irradiation device.

[0010]

To achieve the above object, the present invention provides an X-ray irradiator with a sighting device provided with a sighting device. A first aperture mechanism in which a pair of shielding plate members can open and close the irradiation opening in conjunction with each other, and a pair of shielding plate members interlock in a direction orthogonal to the first aperture mechanism to open and close the irradiation opening. A possible second diaphragm mechanism, and a diaphragm device provided with the first laser irradiation means for irradiating the side of the frame-shaped member with laser light in a plane including the center of the irradiation opening, It is characterized by comprising an aiming device by means of a second laser irradiation means for irradiating the laser light in a plane substantially orthogonal to the laser light by the first laser irradiation means and including the center of the irradiation opening. And

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a configuration example of a diaphragm device with a sighting device of an X-ray irradiator according to the present invention.

The aperture device 10 with a sighting device shown in the figure has an opening shape and size of the irradiation port 11 changed inside a fixed frame 12 as a rectangular parallelepiped frame member having an irradiation port 11 as an irradiation opening in the center. An aperture mechanism 20 is provided, and a laser projector 31 (Y-axis laser projector 31Y, X-axis laser projector 31X) as a laser irradiating means constituting a sighting device 30 is provided on two adjacent outer peripheral surfaces of the fixed frame 12, respectively. The X-ray irradiator is mounted on an irradiating section of an X-ray irradiator (not shown) so that the center of the irradiation port 11 coincides with the irradiation center.

The aperture mechanism 20 includes two sets of one-way aperture mechanisms 2 each having an aperture plate 22 as a pair of interlocking shielding plate members.
1 (vertical stop mechanism 21B, horizontal stop mechanism 21)
H) is provided so that the direction of the aperture is orthogonal.

The one-way aperture mechanism 21 is a conceptual diagram shown in FIG.
As shown in FIG. 5, a pair of aperture plates 22, 22 formed of, for example, a lead plate having a predetermined thickness capable of blocking X-rays can open and close the irradiation port 11 at symmetrical positions sandwiching the center of the irradiation port 11. A rack gear 22 </ b> A is provided and extends on the side facing the end of each aperture plate 22.
The pinion gear 13 is rotatably provided on a rotation axis orthogonal to the direction of movement of the aperture plate 22, and is engaged with both sides thereof.

The rotation shaft of the pinion gear 13 is
Is connected to a knob 14 disposed on the front side of the camera, and is rotated by the knob 14.

In the one-way aperture mechanism 21 having such a configuration, the left and right aperture plates 22, 22 are interlocked in opposite directions by the rotation of the pinion gear 13 by the rotation operation of the knob 14, and are separated symmetrically with respect to the center of the irradiation port 11. Move in close proximity. Thereby, the opening width of the irradiation port 11 in the corresponding direction can be defined. By providing two sets of such one-way stop mechanisms 21 with the stop directions orthogonal to each other, each one-way stop mechanism 21 can be adjusted. By doing so, it is possible to form an arbitrary rectangular opening having a center symmetry of the irradiation port 11.

The aiming device 30 is provided with the fixed frame 12 as described above.
Laser projector 3 mounted on two adjacent surfaces on the outer circumference
1 (Y-axis laser projector 31Y, X-axis laser projector 3
1X).

The laser projector 31 is a conceptual diagram shown in FIG.
As shown in the figure, laser beams 31y and 31y are transmitted through an optical system.
x is radiated at a predetermined angle in one plane, and the irradiating planes are respectively arranged so as to pass through the center line of the irradiation port 12. That is, the Y-axis laser projector 31Y is disposed so that its irradiation plane passes through the center line of the irradiation port 12 in the vertical direction, and the X-axis laser projector 31X has its irradiation plane set to the irradiation port 1.
2 are arranged so as to pass through the center line in the lateral direction.

Thus, when the laser beam 31y and 31x are radiated from the laser projectors 31Y and 31X as shown in the projected image on the virtual target plane 1 in FIG. Are crossed on the center line of the irradiation port 12 and the projected image has a cross shape, and the crossing point is on the center line of the irradiation port 12. Therefore, by locating the intersection of the projection images from both laser projectors 31Y and 31X at the desired imaging site, the X-
It is possible to match (ie, aim) the irradiation position of the line.

[0021]

As described above, according to the aperture device with the sighting device of the X-ray irradiator according to the present invention, the frame-like member having the irradiation opening mounted on the irradiator of the X-ray irradiator has:
A first aperture mechanism in which a pair of shielding plate members can open and close the irradiation opening in conjunction with each other, and a pair of shielding plate members in conjunction with a direction orthogonal to the first aperture mechanism can open and close the irradiation opening. A second diaphragm mechanism, and a diaphragm device provided with the first laser irradiation means for irradiating a side surface of the frame-shaped member with a laser beam in a plane including the center of the irradiation opening, and the first laser The diaphragm device is provided with a sighting device by a second laser irradiating means for irradiating the laser light in a plane substantially orthogonal to the laser light by the irradiating means and including the center of the irradiation opening, so that the diaphragm device is By moving each shielding plate member of the one aperture mechanism and the second aperture mechanism orthogonal to the aperture mechanism, an arbitrary rectangular opening having a central symmetry of the irradiation aperture can be formed. Adjusting aperture without need It can be.

In the aiming device, the laser light from the first laser irradiating means and the laser light from the second laser irradiating means intersect on the center line of the irradiation opening, and the projected image becomes a cross shape. By locating the intersection of the projected image at the desired site for imaging, it is possible to aim and match the X-ray irradiation position from the irradiation opening. Failure can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a configuration example of a diaphragm device with an aiming device of an X-ray irradiation device according to the present invention.

FIG. 2 is a conceptual diagram of a diaphragm mechanism.

FIG. 3 is a conceptual diagram of an aiming device.

FIG. 4 shows a conceptual diagram of an X-ray irradiation apparatus as a conventional example,
(A) shows the aiming time, and (B) shows the photographing time.

[Explanation of symbols]

 Reference Signs List 10 aperture device with aiming device 11 irradiation port (irradiation opening) 12 fixed frame (frame-like member) 20 aperture device 21 aperture mechanism 21B vertical aperture mechanism (diaphragm mechanism) 21H left-right direction aperture mechanism (aperture mechanism) 22 aperture plate ( 30 Sighting device 31 Laser projector (laser irradiation means) 31Y Y-axis laser projector (laser irradiation means) 31X X-axis laser projector (laser irradiation means) 31y laser light 31x laser light

Claims (1)

[Claims] A first aperture mechanism capable of opening and closing the irradiation opening by interlocking a pair of shielding plate members with a frame member having an irradiation opening attached to an irradiation unit of the X-ray irradiation apparatus; And a second diaphragm mechanism capable of opening and closing the irradiation opening by a pair of shielding plate members interlocked in a direction orthogonal to the first diaphragm mechanism. A first laser irradiating means for irradiating a laser beam onto a plane including the center of the irradiation opening, and a plane including a center of the irradiation opening substantially orthogonal to the laser light from the first laser irradiating means. An X-ray irradiator with an aiming device, characterized in that it is provided with an aiming device using a second laser irradiating means for irradiating a laser beam on the X-ray irradiating device.