JPS5831142Y2 - X-ray photograph cassette - Google Patents

Description

[Detailed description of the invention] The present invention relates to an X-ray photography cassette (hereinafter simply referred to as a cassette), and more specifically, a back cover is attached to the main body having a front plate in a hinged manner, and additional parts are added to the inner surfaces of the front plate and back cover. This cassette relates to a cassette in which even if a film loaded in a cassette with a photosensitive screen attached thereto sticks to an intensifying screen attached to a back cover, the film can be surely peeled off and taken out.

Generally, X-ray photography is performed by sandwiching a film between intensifying screens in order to obtain high sensitivity.

The better the adhesion between the film and the intensifying screen, the sharper the photograph can be obtained.

Cassettes, which have a back cover attached to the main body in a hinged manner, are widely used because they allow film loading and unloading to be carried out both automatically with a machine and manually.

This cassette has a curved shape on the back cover and a gap between the back cover and the intensifying screen so that the pressure between the front plate and the back cover maintains close contact between the film and the intensifying screen when the cassette is closed. Efforts have been made to the material and thickness distribution of the pressurizing material, such as a sponge, to be inserted.

However, the film and intensifying screen tend to stick to each other due to close contact due to vacuum conditions or due to moisture or static electricity.
The better the adhesion between the film and the intensifying screen, the greater this tendency, resulting in the inconvenience that the film is difficult to peel off from the intensifying screen when taken out from the cassette.

In a take-out device that automatically takes out photographed film loaded in a cassette and sends it to an automatic developing machine, etc., load the cassette into the cassette loading section of the device with the back cover facing downward, open the lid, and film the film. A method of automatically dropping the material to take it out is an effective method because it has a simple mechanism and is easy to operate.

When the film is taken out from the cassette by falling under its own weight in this way, it may stick to the intensifying screen due to the vacuum state or the influence of moisture or static electricity, as described above. There is a cassette lid opening mechanism that is provided with a means for vibrating the opened cassette main body and back cover, which was filed as Utility Model Application No. 45067/1987.

When using this technique, in most cases the film peels off from the intensifying screen and falls off, but in some cases the film sticks to the intensifying screen on the back cover side (this is called the back intensifying screen) and peels off. It may take some time.

In addition, as a cassette with a means for peeling off the film stuck to the intensifying screen fixed to the cassette, for example,
There are those disclosed in Japanese Patent No. 0-79380 and Japanese Patent No. 5288980.

The former has a notch at the edge of the intensifying screen and a spring that can be retracted into this notch, while the latter has a notch in the intensifying screen where the name is printed and a film pressing member is used to open the cassette lid. It is designed to reliably peel off the film that is sometimes stuck to the intensifying screen (in particular, the latter is also disclosed for use in a device that opens a cassette with the aforementioned back cover falling downwards).

). However, when these cassettes are opened by the above-mentioned lid opening device and the film is taken out by falling under its own weight, there is a great possibility that the film will be bent in its falling direction by the spring or the film pressing member.

This is due to the fact that the above-mentioned cassette spring or film pressing member is arranged at a position where it acts predominantly on one side of the film.

In this invention, when the lid is opened, the film is peeled off from the intensifying screen by the force of a spring or plastic elastic body, and when the film is taken out by falling under its own weight, the falling direction of the film is not affected by the film peeling member. The purpose is to provide a cassette made of

The object of the present invention is to attach a back cover to a main body having a front plate in a hinged manner, to fix a front intensifying screen and a back intensifying screen to the inner surfaces of the front plate and the back cover, respectively, and to In a cassette in which an elastic peeling member for peeling the film from the back intensifying screen is provided on the back cover, the peeling member is inserted into a hole provided near the side opposite the hinge of the back intensifying screen. It is a distant relative by making it so that it can sink in from the surface of the paper, as if it were protruding from the top.

Hereinafter, the present invention will be explained in detail based on the illustrated embodiments.

Fig. 1 is a perspective view showing the cassette according to the present invention with the back cover wide open, Fig. 2 is a partial sectional view showing the cassette with film loaded and the back cover closed, and Fig. 3
The figure is a partial cross-sectional view showing the back cover opened after loading a film into the same cassette, and Figures 4 and 5 respectively explain how the film loaded in the same cassette is taken out by the gravity drop method. FIG. 6 is a side sectional view showing how the cassette is loaded with film.

The illustrated cassette consists of a main body 1 and a back cover 2.

The main body 1 consists of a front plate 3 and a frame 4, and one side of the back cover 2 is hinged to one side of the frame 4 with a hinge 5 so that it can be opened and closed.

The other side of the back cover 2 is provided with an energized movable claw 7 for locking the back cover 2 in a locking hole 6 formed on the other side of the frame 4.

A pressure member 8 made of a thick elastic material such as sponge is provided on the inner surface of the back cover 2.

A back intensifying screen 9A and a front intensifying screen 9B are fixed to the surface of the pressure member 8 and the inner surface of the top plate 1.

The structure up to this point is similar to that of a normal X-ray photographic cassette, but the difference is that a film peeling member 10 is provided.

That is, the film peeling member 10 is provided near the side facing the hinge 5 so as to be biased and protrude from the surface of the back intensifying screen 9A so as to be retractable.

The film peeling member 10 has a hat shape, and is fitted into a guide 11, and a hole 14 formed in the back intensifying screen 9A by a spring 13 interposed between the film peeling member 10 and a seat 12 having a protrusion in the center.
It protrudes from the bias.

When the back cover 2 is closed, the film peeling member 10 is pressed and depressed from the back intensifying screen 9A surface as shown in FIG. The portion of the film F that protrudes from the surface of the paper 9A is lifted from the back intensifying screen 9A.

In order to take out the film F loaded in this cassette by gravity drop method, place the back cover 2 downward, insert a protrusion into the locking hole 6, and press the tip of the movable claw 7 against the bias. This is done by causing the unlocked back cover 2 to open under its own weight.

In this method of opening the back cover 2 downward, in most cases the film F peels off from the front intensifying screen 9B under its own weight and sticks to the back intensifying screen 9A.

In the process of opening the lid, first, the film peeling member 10
The nearby film F may peel off from the back intensifying screen 9A as shown in FIG. 4, and at this time, other parts of the film F may stick to the back intensifying screen 9A.

Next, as shown in FIG. 5, when the back cover 2 opens in the direction of the arrow A under its own weight, wind pressure acts in the direction of the arrow B, causing other parts of the film F to peel off from the back intensifying screen 9A. slides down from the back intensifying screen 9A due to its own weight.

Since the film peeling member 10 is provided on the side facing the hinge 5, that is, on the side that opens wide when the lid is opened, in addition to the above-mentioned effect, the film peeling member 10 can be used to remove the film F as shown in FIG. There is no problem that the leading end of the film F gets caught on the peeling member 10 even when loading the film F.

Further, since the film peeling member has a sufficient diameter of several mm, the contact area when the film F slides down is extremely small, and the directionality of the film F when it slides down is not impaired.

Furthermore, if the head of the film peeling member 10 is shaped with a high center and no directionality, this effect becomes even more pronounced.

Providing the film peeling members 10 at two locations symmetrical to the centerline of the cassette also has the effect of not impairing the directionality of the film F when it slides down.

Furthermore, by providing the film peeling member 10 so as to protrude from the hole 14 made in the back intensifying screen 9A, the area of the intensifying screen can be utilized to the maximum, and the position where the film peeling member 10 is provided can be freely selected. It has many advantages, such as being able to stably hold the film peeling member 10 and making it easier to diagnose the obtained photographic images.

Since the present invention is an X-ray photographic cassette as described above,
When the back cover is opened, a film peeling member that protrudes from the back intensifying screen surface peels off the leading edge of the film from the back intensifying screen surface to create a gap, and the wind pressure when the back cover opens and falls is applied through this gap to increase the back of the film. It has the effect of being able to be reliably peeled off from the paper surface.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an open X-ray cassette according to the present invention, Figs. 2 and 3 are cross-sectional views showing parts of the cassette, and Figs. 4 to 6 are sectional views of the cassette. FIG. 1...Body, 2...Back cover, 3...
...Top plate, 4...Frame body, 5...Hinge,
9A... Back intensifying screen, 9B... Front intensifying screen, 10... Film peeling member, 13
······spring.

Claims (1)

[Scope of utility model registration request] A back cover is attached to the main body having a front plate in a hinged manner, a front intensifying screen and a back intensifying screen are fixed to the inner surfaces of the front plate and the back cover, respectively, and the loaded film is attached to the back intensifying screen. In the X-ray photography cassette in which the back cover is provided with an elastic peeling member that can be peeled off from the back cover, two of the elastic peeling members are formed in a hat shape, and the center line of the cassette on the side opposite to the hinge of the back intensifying screen is An X-ray photographic cassette characterized in that it is provided so as to be retractable and protrude at symmetrical positions.