JP3385346B2 - Method for producing plate for holding X-ray film - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray imaging apparatus,
The present invention relates to a method for manufacturing a plate for holding an X-ray film stored in a cassette (photographing frame). [0002] For example, when an X-ray of a chest is taken,
As shown in FIG. 9, the X-ray film is usually not placed directly on the frame F at the position corresponding to the chest of the subject, but is once placed on the cassette C and then leaned. This is because the X-ray film is housed in the cassette C to shield it from room light, protect it from mechanical damage, and at the same time serve to make the film and the intensifying screen adhere to each other. Then, every time the subject is photographed, the cassette C is removed, the X-ray film in the cassette is replaced, and the frame is re-exposed.
He was leaning against Mu F. However, at present, when a cassette containing an X-ray film for which radiography has been completed is mounted at a predetermined position in the apparatus, the film in the cassette is automatically taken out, developed, and a new film of a desired size is automatically taken out. An automatic film loading device (not shown) has been developed. [0003] Although this apparatus has the advantage that the operator does not have to change the film one by one, there is an advantage that when the film is to be automatically loaded in the cassette, a predetermined position is required. The film must be fixed one by one, and if the position is shifted, not only the X-ray imaging cannot be performed correctly, but also the film is wasted and the photographing apparatus may be broken down. Therefore, there is a method of reducing the pressure in the cassette, sucking the film one by one by the negative pressure, and holding the film in a predetermined position by a plate having a structure in which a rubber sheet is attached to a frame provided in the cassette. it was thought. However, for this purpose, the airtightness between the frame and the rubber sheet is good so that air does not leak when the pressure inside the cassette is reduced, and the rubber sheet is drawn to the inner surface of the cassette when the pressure is reduced and the film is removed. The rubber must have sufficient elasticity to hold down, but simply bonding the rubber sheet to the frame does not provide such an effect, and such a plate exists in conventional products. Did not. In view of the above, an object of the present invention is to provide a method for producing such a plate. SUMMARY OF THE INVENTION Accordingly, a method of manufacturing an X-ray film holding plate in a cassette according to the present invention comprises: After setting a metal frame of a plate slightly smaller than the rubber sheet on top of, and applying an adhesive to the metal frame and / or the rubber sheet, in a state where the rubber sheet is pressed against the metal frame and sufficiently stretched, The pair of retaining frame plates and the mold are tightened with screws, and then the rubber sheet and the metal frame are bonded by baking. A cassette provided with the plate for holding an X-ray film manufactured as described above is prepared, an X-ray film is put in the cassette, and X-ray photography is performed as in the conventional case. Next, when the cassette is mounted on the automatic film loading apparatus, the inside of the cassette is pressurized to take out the photographed film, and then the air is released from the valve to reduce the pressure. At this time, a new film is sucked in by the negative pressure in the cassette, and the rubber sheet of the plate is drawn to the film side to firmly fix the film. Thereafter, the film is firmly fixed until X-ray photography is performed and the film is next mounted on the automatic loading apparatus, so that the film does not shift. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a rubber sheet and a pair of plate frames,
FIG. 2 is a perspective view of the assembled state of the plate frame and the rubber sheet and the corresponding lower mold. In these figures, 1
Is a rubber sheet for holding the X-ray film, and preferably has a high elasticity so as to function to hold the X-ray film with its elasticity when a negative pressure is applied to the inside of the cassette. Further, it is preferable that a pin hole 2 is formed in advance around the periphery. Reference numerals 3 and 4 denote a pair of upper and lower plate frames (retainer holding frame plates) for holding the holders sandwiching the ends of the rubber sheet 1, and the upper plate frame 3 includes the pin holes 2 of the rubber sheet 1. At the corresponding position, a similar pin hole 5 is formed, and the lower plate frame 4
And a bolt hole 6 for screwing together. The lower plate frame 4 is provided with pins 7 fitted into the pin holes 2 and 5, and further provided with bolt holes 8 corresponding to the bolt holes 6. Reference numeral 9 denotes a lower mold (mold), and a positioning guide 11 for a metal frame 12 of a plate is provided on a die plate 10 at a position corresponding to the pair of plate frames 3 and 4. Bolts 13 corresponding to the bolt holes 6 and 8 of the plate frames 3 and 4 are planted, so that the plate frames 3 and 4 can be tightened with screws 14. Next, the manufacturing process of the plate for holding an X-ray film of the present invention will be described along the process procedure with reference to FIGS. First step: After the metal frame 12 is degreased and the surface to be bonded to the rubber sheet 1 is sandblasted, an adhesive S is applied (primer application). Second step: The surface of the rubber sheet 1 to be bonded to the metal frame 12 is paper-processed, and an adhesive S is applied. This metal frame 12
Alternatively, the adhesive S may be applied to only one of the rubber sheets 1. Third step: Next, as shown in FIG. 2, the rubber sheet 1 is stretched and sandwiched between a pair of upper and lower plate frames 3, 4, and the metal frame 12 is set on the positioning guide 11 (FIG. 3). ). Fourth step: Then, the rubber sheet 1 is pressed against the metal frame 12 while being sandwiched between the plate frames 3 and 4, and the rubber sheet 1 is sufficiently stretched, and the plate frame 3 is attached to the lower mold 9 with bolts 13 and screws 14.・ Tighten 4 (Fig. 4). Fifth Step: The rubber sheet 1 and the metal frame 12 are bonded by applying pressure and heat by baking using the upper mold 15 (FIG. 5). Thereafter, unnecessary peripheral rubber sheets are cut to obtain an X-ray film holding plate 16 (FIG. 6). The plate 16 is provided in a cassette in advance with the air vent valve 17 mounted on the metal frame 12 as shown in FIG. In this embodiment, the aluminum sheet 1 which is slightly smaller than the metal frame 12 is provided on one of the front and back surfaces of the rubber sheet 1.
8 shows an example of bonding. This is because the X-ray film 19 may not be sufficiently pressed by the rubber sheet 1 alone, and if the X-ray film 19 is adhered to the aluminum plate 18 on the rubber sheet 1, the X-ray film 19 is pressed against the cassette C by both. There is an advantage that the holding of the film 19 is stabilized. [0010] As in the prior art, when the film is mounted on the automatic film loading device after the X-ray photographing, the film after the photographing is removed and sent to the developing process. I do. Then, the new film 19 is sucked by the negative pressure, and the rubber sheet 1 and the aluminum plate 18 are attracted to each other, so that the X-ray film 19 is firmly fixed as shown in FIG. Then, with the film 19 fixed, the cassette C is used for X-ray photography as in the conventional case. After X-ray photography, when the film is mounted on the automatic film loading device again,
By injecting air from the drain valve 17 and pressurizing the inside of the cassette, the adsorption between the rubber sheet 1 and the cassette C is released as shown in FIG. 7 to release the holding of the X-ray film 19 and send the film to the developing step. At the same time, a new film is mounted in the same manner as described above. 20 is a rubber packing. According to the present invention, the rubber sheet is set on a mold and the rubber sheet fixed to the frame for pressing is pressed against the metal frame, instead of simply attaching the rubber sheet to the metal frame. When the rubber sheet and metal frame are glued together with the screws, tighten the rubber sheet and the metal frame with the metal sheet frame firmly stretched. In addition, the adhesion effect is increased, and the adhesion between the metal frame and the rubber sheet is extremely improved. For this reason,
Depressurize the inside of the cassette and press the film with its suction force X
There is an effect that the wire film holding plate can be used without air leakage or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a rubber sheet and a pair of plate frames. FIG. 2 is a perspective view of a state where the plate frame and the rubber sheet are assembled and a lower mold corresponding thereto. FIG. 3 is a view showing a third step of the plate for holding an X-ray film of the present invention. FIG. 4 is a view showing a fourth step of the plate for holding an X-ray film according to the present invention. FIG. 5 is a view showing a fifth step of the X-ray film holding plate of the present invention. FIG. 6 is a completed view of an X-ray film holding plate of the present invention. FIG. 7 is a cross-sectional view of a state in which the X-ray film holding plate of the present invention is housed in a cassette. FIG. 8 is a partially enlarged cross-sectional view showing a state in which the X-ray film is held between the rubber sheet and the aluminum plate by reducing the pressure in the cassette. [Fig. 9] A chest X-ray frame on which a cassette is leaned.
FIG. [Description of Signs] 1 Rubber sheet 3 Upper plate frame (frame plate for holding press) 4 Lower plate frame (frame plate for holding press) 9 Lower mold (mold) 12 Metal frame 18 Aluminum plate 19 X-ray film C cassette

Claims (1)

(57) [Claims] [Claim 1] An end of a rubber sheet is sandwiched between a pair of holding frame plates, and a metal frame of a plate slightly smaller than the rubber sheet is set on a mold. After applying an adhesive to the metal frame and / or the rubber sheet, in a state where the rubber sheet is pressed against the metal frame and sufficiently stretched, a pair of the holding frame plate and the mold are tightened with screws. And then bonding and bonding the rubber sheet and the metal frame by baking.