JPS5953830A - X-ray film holding device - Google Patents

Abstract

PURPOSE:To prevent air enclosure and remove present air when an X-ray is held, by forming a projecting surface in such a direction that the surface contacts the X-ray sensitizing screen of a rear cover. CONSTITUTION:An X-ray film is disposed between sensitizing screens 4 and 5. The rear cover is made of a nearly cylindrically curved elastic panel in order to press a film holding plate 1 and the rear cover 2. The rear cover 2 has a convex engagement surface and this elastic panel has an internal surface covered with a foamed material cushion 3 which has uniform thickness and uniform density. Therefore, when the rear cover 2 supported by a projection part 20 is closed, the X-ray film is placed between the sensitizing screens 4 and 5 and the film is pressed successively into tight contact while discharging air without enclosing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an X-ray film holding device used in X-ray photography for holding an intensifying screen and a film accommodated in close contact with the screen.

[Technical Background of the Invention] This type of X-ray film holding device does not use an X-ray intensifying screen to adapt the film to the relatively low X-ray energy levels used. A particular problem arises in that the intensifying screen fluoresces under X-ray bombardment, thus emitting light energy and aiding the exposure of the adjacent X-ray film.

These screens are placed on the front (and rear) side of the XI film holder on either side of the film. The film must be firmly clamped between the two intensifying screens. If the intensifying screen is not held in close contact with the x-ray film, the fluorescence tends to dissipate, resulting in a blurred x-ray image.

[Problems with the background art] A conventional X-ray filter 11 holding device has an intensifying screen on the surface of the 1L' disclosed in 1973 120693 @ Publication. l 1.r
Since iW plates are used, even when the lid and bottom are connected via a joint, especially in large cases, air is sealed in.
In operation, the xm film holder typically closes so quickly that the problem is that air cannot escape completely during its closure. This air prevents continuous contact between the film and the intensifying screen. The center of the film has minimal or no contact with the intensifying screen, while the edges have maximum compressive contact.
be. Since the most important part of the radiograph is probably the center of the film, it is not very desirable to use such a thin flat plate configuration for the lid and bottom of the XFjl film holder. .

[Objective of the Invention 1] The present invention provides an X-ray film that can be used to prevent air from being trapped or to remove any trapped air that may be present when the X-ray film holder is closed. It is an object of the present invention to provide a film holding device.

[1Ilt Requirements of the Invention] The X-ray film holding device according to the present invention includes an elastic film having a convex surface facing the X-ray source side. It consists of a back cover including a curved plate, and a flat film holding plate that transmits almost all of the radiation used for exposure and has an intensifying screen glued to the inner surface that is in combination with and in contact with the back cover. It is characterized in that the contact pressing area between the back cover portion and the film holding plate changes sequentially.

[Brief Embodiments] The present invention will now be described in detail based on embodiments shown in the drawings.

In FIG. 1, 1 is a film holding plate made of a flat aluminum plate, 2 is a back cover made of a curved aluminum plate, which are hinged to each other by a hinge device 20;
3 is a foamed plastic material adhered to the inner surface of the lid material 2 to elastically support the intensifying screen 4;
Reference numeral 5 denotes an intensifying screen mounted on the cover 2 with a length of 4 km 1 km opposite to the intensifying screen 4 which has been removed. In order to maintain the tightness between the film holding plate 1 and the back cover 2, for example, a spring (L!IJ') is connected between them. In the wooden embodiment, the back cover has a convex engaging surface for compressing and supporting a substantially cylindrical curved elastic panel (X-ray film sheet), and this elastic panel Each shoe has a foam cushion C-covered inner surface with a moderate thickness and uniform density, and each shoe is closed.
11) The interior surface contains an intensifying screen that rolls over the lumen to prevent air from becoming trapped at the edge of the 11 lumen.

As another embodiment of the X-ray film holding device according to the present invention, the hinge connection between the film holding plate and the back cover is eliminated, and the back cover is placed close to the film holding plate almost parallel to the film holding plate.

In FIG. 2, X-ray film storage 1. The back cover of the device has a cylindrical curvature 1, and the back cover 6 has a foam cushion 7 and an intensifying screen 8 arranged with a corresponding curvature.

FIG. 3 shows the opening/closing mechanism of the X-ray film holding device having the configuration shown in FIG. 2, as well as mechanical means for pressing the film holding plate and the back cover.

In FIG. 3, a connecting culm 9a for pressing a back cover 6 (described later) onto the film holding plate 1 is attached to the side edge of the film holding plate 1.
, 9b by pin connection.
, 10b are provided. One end of the connecting culms 9a, 9b is connected with a pin at the edge of the back cover 6, and the other end is also connected and configured on one side edge so that each can rotate freely.

Furthermore, in order to generate a pressing force for closing approximately parallel to the lIIO2 film holding plate 1, a leaf spring 1 is fixed at one end to the film holding plate 1 side and the other end is in contact with the connecting culm.
1a, 11b @ set b.

Regarding the leaf spring 11, the side edge of the square (L) is the same.
', iiu 1. I'm getting fucked. Connected culm 9a, 9t)
[The I
Koen En/1. 7. Since the bins are connected, the connecting culm 9a that comes down during the opening and closing operation of the X-ray film distribution 14:R
, 9 t, , + movement 11 is facilitated.

[Effects of the Invention] In any of the embodiments described above, when the Noilm holding plate and the back cover are closed, a large pressing force is generated in the area where they first come into contact, and the adjacent surface area is Even if air is enclosed in a shape such that it is pressed one after another, it will be piled up one after another without pushing out the air.

In addition, among the above-mentioned embodiments, when considering the stroke during the opening/closing operation of the film holding plate and the back cover, the spot shot to be used, the external shape of the device, etc., as shown in FIG.
．． , : Examples are preferred.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an overview of one embodiment of the X-ray film holding device of the present invention, FIG. 2 is a cross-sectional view showing an overview of another embodiment, and FIG. FIG. 2 is a schematic configuration diagram showing the opening/closing mechanism of the X-ray film holding device of the embodiment and one stage of press 1Tf inside the machine. 1......Film holding plate 2.6......l! Lid 3... Foam cushioning material 4.5, ε3・
......Intensifying screen 9...
Connecting culm 10... Support member 11... Leaf spring

Claims (1)

[Claims]
J) J So! xtlA film holding screen 1. ￥ Device N (this rr31i'''U, bullet IT1 which is convex to the X-ray source side) curvature +ll+
It passes through almost the entire part of the Singing Dynasty, and the back cover and 11th, 17'S
An intensifying screen is glued to one side of the IR majesty 1; The contact suppression area with the holding plate changes 1 sequentially (XwA film holding device where 212 is 14gff1l. (Hereinafter -1' is white)