JPH0219760Y2 - - Google Patents

Description

[Detailed description of the invention] In an X-ray analyzer such as a fluorescent X-ray analyzer, a solar slit is used to obtain wide parallel X-rays using a spectroscopic crystal. Conventional solar slits have a structure in which rectangular slit foils and band-shaped spacers placed on both sides are alternately arranged and overlapped, which are inserted into a U-shaped frame and tightened with a cover plate. However, differences in tightening force tend to occur depending on the spacers at both ends of the band-shaped spacer, and this tendency is further exacerbated by expansion and contraction caused by changes in room temperature. For this reason, it was difficult to arrange the slit foils completely in parallel, and the distortion caused deterioration of the characteristics. The present invention provides a solar slit which eliminates the above-mentioned drawbacks and which is easy to assemble.

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a vertical front view, and Fig. 3 is an exploded perspective view.
The figure is a longitudinal side view, and FIG. 4 is an enlarged view of a part of FIG. 2. In this way, the solar slit of the present invention has a large number of rectangular slit foils 3, 3, etc., arranged on both sides of the rectangular slit foils 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, etc. The inner surface of the rectangular cylindrical frame is formed by alternately superimposing strip-shaped spacers 4, 4, etc. having a certain thickness, and inserting vertical support plates 5, 6, 7 at the outermost sides and the center thereof. and the support plate 5 through the slit 3,
3... are provided with springs 8, 8 that press in the direction of superposition. Note that the band-shaped spacers 4, 4... are arranged parallel to the axis of the rectangular cylindrical frame, and the springs 8, 8
The spring is formed by bending an elastic thin plate into a semi-cylindrical shape, and the spring is fitted into grooves 9, 9 formed parallel to the spacer 4 on both sides of the inner surface of the rectangular cylindrical frame. Furthermore, a shielding plate 1 is provided on both sides of one end of the rectangular cylindrical frame so as to cover the ends of the spacers 4, 4.
0 and 10 are attached. Also, when assembling the solar slit above, first screw 1 into U-shaped frame 1.
1, attach the shielding plates 10, 10. Next, the slit foils 3, 3..., spacers 4, 4..., and support plates 5, 6, 7 are superimposed and inserted into the U-shaped frame 1, and when pressed with a force of several hundred grams, the edge of the frame 1 The thickness of the polymer is adjusted so that, for example, about 0.2 mm protrudes from the upper surface of the support plate 7, and the cover plate 2 is tightened with the screws 12 to form a rectangular cylindrical frame. Finally, the semi-cylindrical springs 8, 8 are inserted into the grooves 9, 9 from one end of this cylindrical frame to complete the process.

As mentioned above, the present invention connects the slit foils 3, 3... and the spacers 4, 4... via the vertical support plate 5.
The polymer is pressed by springs 8, 8.
Therefore, it is possible to maintain uniform tightening pressure on each part of the polymerized slit foils 3, 3, . . . and the spacers 4, 4, . Moreover, since this pressure does not change due to expansion and contraction of the cylindrical frame etc. due to changes in room temperature, distortion of the slit foil is prevented and desired characteristics can be reliably obtained. In addition, since the tightening pressure is regulated by the elasticity of the spring, there is no need to make strict adjustments to ensure that the pressure is uniform throughout the assembly.
Solar slits are easy to manufacture. In addition, by using the semi-cylindrical springs 8, 8 as in the above embodiment, it is possible to insert the slit foil etc. into the frame from one end after inserting the slit foil etc. as described above, making assembly even easier. At the same time, the structure is simple. Furthermore, a support plate 6 inserted between the slit foils
Although this is not necessarily necessary, it is possible to maintain the aforementioned clamping pressure more uniformly, and when the solar slit is placed in a vacuum and one end of the solar slit is placed in close contact with the window of the proportional counter, etc. It is possible to prevent the slit foil from being pressed by the window membrane and deformed by the internal pressure of the counter tube.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a vertical front view, Fig. 3 is a longitudinal side view, and Fig. 4 is a partially enlarged view of Fig. 2. It is a diagram. In the figure, 1 is a U-shaped frame for forming a rectangular cylindrical frame, 2 is a cover plate, 3, 3...
is slit foil, 4, 4... is spacer, 5, 6,
7... is a support plate, 8 is a spring, 9 is a groove, 10 is a shielding plate, and 11 and 12 are screws.

Claims (1)

[Scope of utility model registration request] A large number of rectangular slit foils and band-shaped spacers arranged on both sides are alternately overlapped, and a vertical support plate is overlapped on at least one surface, so that the axis and the spacer are overlapped within the rectangular cylindrical frame. A solar slit is inserted so that the slit foils and the like are arranged in parallel, and a spring is provided between the support plate and the inner surface of the rectangular cylindrical frame to press the support plate in the direction in which the slit foils and the like are superimposed.