JPS5933452A - Film holder - Google Patents

Abstract

PURPOSE:To bring an intensifying film and a film closely into contact with each other uniformly while holding always the intensifying film in a stable shape, by interposing a cushion material, which is obtained by covering a plate-shaped porous elastic body with a highly airtight bag, between one plate body and the intensifying film. CONSTITUTION:A porous elastic body 31 formed into a relatively thick plate is covered with a highly airtight bag 32 and is sealed to constitute a cushion material 30, and its internal pressure is set to zero. In a film holder 1, two intensifying films 4 and 5 between which a film 6 is inserted are helf between plate bodies 2 and 3; and when the cushion material 30 is interposed between one plate body and intensifying films, the bag 32 receives the pressure of plate bodies 2 and 3 to bring the film 6 and intensifying films 4 and 5 closely into contact with each other uniformly. Since the free shape of the elastic body 31 is a plate shape, faces of the cushion material 30 on the intensifying film side are flat, and the cushion material and intensifying films are always held in stable shapes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention is applied to a film holder of a cassetteless film changer used in a cassetteless X-ray imaging apparatus or the like.

[Problems with background technology]

In general, a sheet-like film for X-rays is used by sandwiching it between a sensitizing film that has the function of converting XIv into light in order to push the X-ray angle to a higher level. If the degree of adhesion between the film and the film is not uniform, the degree of adhesion may be uneven,
The degree of adhesion between the film surface and the shadow is an important issue, as it may cause poor image quality with the tool, leading to misdiagnosis, or the need to repeat the shadow.

In particular, the film changer used for the cassette-less ＋'Take out the film one by one and wait for 2 hours? ? (-!, [After loading the film holder into the single-open crimp plate (film holder) in the madder, sending the loaded film holder to the imaging setting, and performing the X-ray shadow, move it to the standby position W<. This function is used to replace the film in the film holder, and the loading and unloading of the film into the film holder is automatically carried out in the dark box.The film holder 1 is shown in FIG. Two plates 2 and 3 are pivoted on one side as shown in the figure (2 if, earthen lid, 3
Sensitizing films 4 and 5 are installed inside the bottom plate (bottom plate), and the upper plate (upper lid 2) is opened as shown in FIG.
After unloading and loading, the film 6 is closed as shown in FIG. 1(a) and the film 6 is held between them. Various measures have been taken to achieve uniform close contact.

Basically, film holder 1 that can hold the sensitizing film 4.5
The purpose is to improve the flatness of the plate surfaces of the top cover 2 and the bottom plate 3, but in reality, due to uneven thickness of the sensitizing films 4 and 5 themselves, warpage and deformation of the plate surface of the film holder 1, etc. Adhesion cannot be obtained.

Therefore, the most commonly used method is to insert an appropriate plate-shaped cushioning material 7 between the sensitizing film 4 and the top cover 2 or between the sensitizing film 5 and the bottom plate 3 as shown in FIG. However, when holding the cushion material, it is difficult to stably obtain a uniform adhesion due to slight curling of the plate surface of the film holder 1 during this adhesion operation and aging of each component. I'm away.

Therefore, as a method of obtaining uniform pressure even if the plate surface is deformed, it is conceivable to provide an air bag instead of the cushion material 7 and utilize the fluid pressure.

However, with a single air bag, (1) the shape when the film is not clamped is unstable, and there is a high risk that it will get in the way when inserting the film.To make the shape of the air bag stable, preload is required. It would be fine to add more, but the center would bulge this time, which would hinder insertion, so the pressure difference would have to be zero, and the shape of the air bag would inevitably become unstable.

(2) It is important to maintain the airtightness of the air bag for a long period of time.
There is a great risk that the air supply inside the bag will change and the state during compression will also change, making it impossible to maintain stable function for a long period of time. That is, reliability is low.

There are drawbacks such as.

[Purpose of the invention]

The present invention has been developed in view of the above circumstances, and eliminates the drawbacks of air bag retention, provides a constantly stable shape, provides uniform compression force, and improves the sensitization %λ and film. The objective is to provide a fill 2/holder that allows uniform close contact.

[Face of the Invention] In other words, in order to achieve the above purpose, the water valve ψ is provided with a part 1 inside the pair of plates. That's X-ray - Kosho 4S1! Set up a sensitizing film to perform the sensitization (C), hold the film in the J■sensitivity%'i rH+ at 1-7X*; A plate-shaped porous elastic body is
←Made with one bag,
ζ, glue 2. 82 I+ (Intermediate 41.
``Try to stir, te, ri, sshi, ntlshi,],ノ''
17, so that there is no instability or air leakage.
Wait gt Use IF l-6, stable fill A j'/f
R81t"'j (7), Qn 5#v%'",
1 fill.

9 in 1 invention! tI+i fli] Please refer to Figure 3 for an example of changing +, -F, and water valves.

3 and 1 are cross-sectional views showing the structure of the cushioning material 30 used for the fill 2 and holder according to the present invention.

In the figure, 31 is a porous and flexible elastic body formed into a relatively thick plate shape, such as maltplane, and this 1ii
The ij sex bag 31 has the same shape as its free shape, and is covered and sealed with a soft airtight bag 32 made approximately by a rotary engraving process. Note that the internal pressure of the bag 32 is approximately zero when no external FL is applied.

The cushioning material 30 having such a structure was used as the cushioning material shown by 7 on February 1, 2015, and a sensitizing film 5 was provided on the front side of the cushioning material 30, and the sensitizing film 5 and the other sensitizing film 4 were provided. so that the film is sandwiched between them. Of course, the cushioning material 3o1:l) may be provided between the sensitizing film 4 and the top cover 2, or may be provided on both the top cover 2 and the bottom plate 3, respectively.

When the cushion cover 30 according to the present invention is provided in this manner, since the bag 32 has already been delivered, the cover 32 of the old cushion 30 is attached to the pressure base holder V) between the top cover 2 and the bottom plate 3 when the film Ph is applied. The internal pressure increases, and the bag 32ij, film 6 and uniformity 1j 4. If there is a gap between t1 and s, the area with no gap will be compressed, and the area with the gap will swell to fill the gap, acting on the sensitizing films 4, 5 and film 6.

Therefore, a uniform degree of adhesion can be obtained between the film 6 and the sensitized films 4 and 5.

Moreover, when the ten-lid 2 is opened, the internal pressure of the bag 32 returns to the original pressure, but since the above-mentioned bow center pillar body 31 is inside,
The elastic body 31 returns to its free shape.

Since the free shape of the neutral body 31 is root-like, the sensitized film (+1i1 side) of the cushioning material 30 is flat, and the cushioning material 30 is always maintained in a stable shape even by 1% of sensitization.

Therefore, for the film holder versus the foil version of film 6,
Support! ! ? ? Cushioning material 3
0 uses the internal pressure of the internal elastic body, ? J tri, since the cushioning material 30 has the function of defining the shape when not receiving external pressure, the cushioning material in the free state? o) The volume remains constant, and the capacitance due to a slight gas leakage over a long period of time32
There is no need to worry about a decrease in the internal gas volume.

Therefore, all of the conventional drawbacks of using the air tube are eliminated, and the film and sensitizing film can be uniformly attached, making it possible to take X-rays with the eldest child. become able to.

It should be noted that the elastic body 31 may be porous and have Ii1 strength.

Therefore, the cushioning material 30 has a free square 3 shape or a flat surface, and the inner surface of the bag 32 is constant in the free state.Since the usage is sufficient, the surface shape of the arched medium column 91 has unevenness. The present invention can be implemented by modifying F:J, ffl, k, etc., and can be applied not only to a cassette-less film holder but also to other film holders.

〔Effect of the invention〕

As mentioned above, the water valve tomorrow will be filled with 1 t of plates.
Ino 1 to l+. (A sensitizer 8~ is provided, and the film is sandwiched between these sensitizers to glue the film used for X-ray shadows. A cushioning material whose surface is flat or plate-shaped in a free state is interposed between at least one of the plates and the sensitizing film; When the film is clamped, the pressure of the internal gas in the bag generated by the external pressure applied to the cushioning material is used to bring the sensitizing film into close contact with the film, so the sensitizing film can be applied uniformly to the film. The degree of adhesion allows for close contact, and when attaching and detaching the film, the cushioning material is made of inner bamboo material.
It returns to the plate shape of , and can be inserted smoothly by removing the film 111. In addition, in the free state, the cushioning material is always kept at a constant volume corresponding to the volume of the elastic body by the action of the elastic body, so that the inside of the bag is It is possible to provide a film holder with excellent features such that there is no need to worry about the gas volume gradually decreasing over a long period of time, and stable performance can be maintained for a long period of time. can.

[Brief explanation of drawings]

Figure 1 shows the paulownia film holder of a cassette telefilm changer, and the standard surface lyl for explaining the main points. Figure 2 is a side view of an improved example of the film holder. Fig. 1 is a side cross section showing the tPt structure of a cushion ladle. 1... Film holder, 2... Earth bell, 3... To Mr. 1, 4.5... Sensitization) 1 (-16... Film, 7
, 3o... Crisis, Nwa, 3)... Porous P columnar body, 32... Mounting.

Claims (2)

[Claims] (1) In a film holder used for X-ray photography in which a sensitizing film is provided inside a pair of plates and the film is sandwiched between the sensitizing films, the porous elastic material is placed in an airtight soft bag. 1. A film holder characterized in that a cushioning material having a substantially flat surface in a free state is provided between at least one of the plates and the sensitizing film. (2) The film holder according to claim 1, wherein in the cushioning material, the porous body is plate-shaped and tightly gripped with a bag so that the internal pressure is approximately zero.