JP3241595U - sample holder - Google Patents

Abstract

Kind Code: A1 A sample holder is provided in which sample replacement work is simple and there is no risk of the sample being scattered inside an X-ray fluorescence spectrometer. A sample holder for fluorescent X-ray analysis includes a tubular body (212) having a hole partially provided in the upper end surface and an open lower end; is placed, an elastic body 206 that urges the tray upward, and a bow portion 220 that is formed of resin and provided with claws 218 at the ends and elastically deforms inward when pressed. and a support member 208 in contact with the lower end of the body, and the tubular body is formed with a fitting portion into which the claw portion is fitted and an exposed portion 216 where a part of the bow portion is exposed to the outside. . [Selection drawing] Fig. 2

Description

The present invention relates to a sample holder.

Fluorescent X-ray spectrometers are known as devices for measuring elements contained in a sample and their concentrations. A sample holder is sometimes used when performing measurement using a fluorescent X-ray spectrometer. For example, there is known a sample holder that has a configuration in which a holding lid is placed over the sample in order to fix the sample placed on a tray in the case (see Patent Documents 1 to 3 below).

Japanese Utility Model Laid-Open No. 59-80739 Japanese Utility Model Laid-Open No. 56-009042 Japanese Utility Model Laid-Open No. 6-58350

Conventional sample holders are fixed by screwing (Patent Document 1 above), screwing (Patent Document 2 above), or fitting a plunger into a groove ( The above patent document 3) was adopted.

In the case of fixing by screwing or screwing, each time the sample is replaced, it is necessary to rotate the holding lid and the screw many times, which is troublesome. Moreover, there is a possibility that screwing or screwing may loosen due to vibration, and the sample holder may come apart inside the fluorescent X-ray spectrometer. Even in the case of the structure in which the plunger is fitted into the groove, there is a possibility that the plunger will come out of the groove inside the fluorescent X-ray spectrometer, causing the sample holder to come apart, and the cost of the parts will be high.

The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide an inexpensive sample holder in which sample replacement work is simple and there is no risk of the sample falling apart inside the fluorescent X-ray spectrometer. That is.

(1) A sample holder for fluorescent X-ray analysis according to one aspect of the present disclosure includes a tubular body having a hole partially provided in an upper end surface and an open lower end; a saucer on which a sample is placed, an elastic body for urging the saucer upward, and a bow made of resin and provided with claws at the ends thereof to be elastically deformed inward by pressing, a support member in contact with the lower end of the elastic body, and the cylindrical body includes a fitting portion into which the claw portion is fitted and an exposed portion where a portion of the bow portion is exposed to the outside. be done.

(2) The above aspect of the present disclosure is characterized in that the tubular body has a cylindrical tubular body and a top body provided with a hole.

(3) The above aspect of the present disclosure is characterized in that the cylindrical body is integrally formed.

(4) In the above aspect of the present disclosure, the saucer further has a concave portion on which the sample is placed on the surface on which the sample is placed.

(5) In the above aspect of the present disclosure, the receiving plate has a convex portion on the bottom surface, and the upper end of the elastic body is fitted with the convex portion of the receiving plate.

(6) In the above aspect of the present disclosure, the support member has a claw-shaped locking portion, and the lower end of the elastic body is locked by the locking portion of the support member. and

(7) The above aspect of the present disclosure is characterized in that the sample holder further includes a bottom plate arranged below the support member.

(8) The above aspect of the present disclosure is characterized in that the cylindrical body, the saucer, and the bottom plate are made of metal.

(9) The above aspect of the present disclosure is characterized in that the cylindrical body, the saucer, and the bottom plate are made of an alloy containing aluminum as a main component.

(10) The above aspect of the present disclosure is characterized in that the fitting portion is a recess into which the claw portion fits.

(11) The above aspect of the present disclosure is characterized in that the exposed portion is a notch that partially exposes the bow portion to the outside.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a sample holder in which sample replacement work is simple and there is no possibility that the sample will come apart inside the fluorescent X-ray spectrometer.

It is the figure which looked down and looked at the sample holder. It is a figure which shows each component part of a sample holder. FIG. 4 is a bottom view of the sample holder; It is a figure which shows the IV-IV cross section of a sample holder. It is a figure which shows the VV cross section of a sample holder. FIG. 4 is a diagram showing a state in which the sample holder is installed on the sample stage of the top illumination type fluorescent X-ray spectrometer.

Preferred embodiments (hereinafter referred to as embodiments) for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a bird's-eye view of the sample holder 100. FIG. FIG. 2 is a view showing each component of the sample holder 100, and is a view of the sample holder disassembled in the vertical direction. 3(a) is a bottom view of the sample holder 100 with the bottom plate 210 removed, and FIG. 3(b) is a bottom view of the sample holder 100 with the bottom plate 210 attached. FIG. 4 is a diagram showing the IV-IV cross section of FIG. 3(b). FIG. 5 is a view showing a V-V cross section of FIG. 3(b). As shown in FIG. 2 , the sample holder 100 has a tubular body 202 , a saucer 204 , an elastic body 206 and a support member 208 . Note that the sample holder 100 may have a bottom plate 210 .

The tubular body 202 has a hole partially provided in the upper end surface and is open at the lower end. Further, the cylindrical body 202 is formed with a fitting portion 404 in which a claw portion 218 (described later) is fitted, and an exposed portion 216 in which a portion of a bow portion 220 (described later) is exposed to the outside. Specifically, for example, the tubular body 202 has a cylindrical tubular body 212 and a top body 214 provided with a hole. It has a fixed configuration. As shown in FIGS. 1 and 2, the upper body 214 has a hole in the center through which the sample 402 is exposed, and has a disk shape. The upper body 214 is a so-called sample mask for preventing unnecessary X-ray irradiation of the non-analyzed portion of the sample 402 . The tubular body 202 may be a tubular body 212 attached with an upper surface body 214 having a different hole diameter. As shown in FIG. 4, the fitting portion 404 is, for example, a recess into which the claw portion 218 fits. Also, as shown in FIGS. 1 and 2, the exposed portion 216 is a notch through which a portion of the arch portion 220 is exposed to the outside. As shown in FIGS. 1 and 2, the cylindrical body 212 may have a hole on its side that functions as an air hole when performing measurements in a vacuum environment. good too. Alternatively, the cylindrical body 202 may be integrally formed without being separated into the cylindrical body 212 and the upper body 214 .

The receiving plate 204 is arranged inside the cylindrical body 202, and the sample 402 is placed thereon. Specifically, the receiving plate 204 has a disk-like shape with an outer diameter that is approximately the same as the inner diameter of the cylindrical body 212 . Moreover, as shown in FIG. 4, the receiving plate 204 has a convex portion on the bottom surface and is fitted with the upper end of the elastic body 206 . Furthermore, the receiving tray 204 may have a concave portion on which the sample 402 is placed on the surface on which the sample 402 is placed. In FIG. 4, since the sample 402 is solid and larger than the diameter of the recess, there is a space between the sample 402 and the receiving plate 204 (above the recess). If the sample 402 is powder or smaller than the diameter of the recess, the sample 402 is placed in the recess.

The elastic body 206 urges the tray 204 upward. Specifically, for example, as shown in FIGS. 2 and 4, the elastic body 206 is a spring. The lower end of the elastic body 206 is locked by the locking portion 228 of the support member 208 , and the upper end of the elastic body 206 is fitted with the projection of the receiving plate 204 . Thereby, the elastic body 206 urges the tray 204 toward the upper body 214 .

The support member 208 is made of resin and can be mass-produced at low cost. For example, the support member 208 may be injection molded from PEEK (Poly Ether Ether Ketone) resin, which has high mechanical strength and high resistance to X-rays. The support member 208 has a bow portion 220 which is provided with a claw portion 218 at its end portion and is elastically deformed inward when pressed, and is in contact with the lower end of the elastic body 206 . Specifically, for example, as shown in FIG. 3( a ), the support member 208 has a base portion 222 near the center and a bow portion 220 extending from the base portion 222 along the inner wall of the tubular body 202 . and is made of an elastically deformable resin. Also, the bow portion 220 has a curved portion 224 elastically deformed inward by pressing, a claw portion 218 provided at the tip of the curved portion 224, and a pressing portion 226 to which force is applied from the outside. Two bow portions 220 are arranged symmetrically with respect to the base portion 222 . As shown in FIG. 4 , the support member 208 is fixed to the tubular body 202 by fitting the two claw portions 218 into the depressions (fitting portions 404 ) provided in the tubular body 212 . At this time, as shown in FIG. 5, two pressing portions 226 are exposed from the notches provided in the cylindrical body 212 . The two pressing portions 226 are arranged at opposing positions with respect to the center of the base portion 222 and are pressed inward by the user when removing the support member 208 from the tubular body 202 . The curved portions 224 are formed thin so as to be elastically deformed inward when pressed. Therefore, when the two pressing portions 226 are pressed inward, the two curved portions 224 are curved inwardly of the cylindrical body 202 . do. When the two curved portions 224 are curved toward the inner side of the cylindrical body 202 , the claw portions 218 are out of the depressions (fitting portions 404 ) provided in the cylindrical body 212 . By separating the support member 208 and the tubular body 202 in this state, the support member 208 can be removed from the tubular body 202 .

The support member 208 also has a claw-shaped locking portion 228 that locks the lower end of the elastic body 206 . Specifically, for example, as shown in FIG. 2, two claw-like locking portions 228 are provided near the end of the surface of the base portion 222 facing the elastic body 206 . The two locking portions 228 are arranged at approximately the same distance as the diameter of the elastic body 206, which is a spring, on the support member 208 side. The elastic body 206 is fixed in a positional relationship with the support member 208 by locking the support member 208 side with the hook of the locking portion 228 .

In addition, the support member 208 has screw holes 302 for fixing the bottom plate 210 on the side facing the bottom plate 210 .

A bottom plate 210 is positioned below the support member 208 . Specifically, the bottom plate 210 has a disc shape with a diameter substantially equal to the inner diameter of the cylindrical body 202 . The bottom plate 210 also has holes 230 at positions corresponding to the screw holes 302 provided in the support member 208 . The bottom plate 210 is fixed to the support member 208 by screws passing through holes provided in the bottom plate 210 and threaded holes 302 provided in the support member 208 .

The cylindrical body 202, the saucer 204 and the bottom plate 210 are made of metal. Specifically, for example, the cylindrical body 202, the receiving plate 204, and the bottom plate 210 are made of an alloy containing aluminum as a main component. The alloy containing aluminum as a main component is lighter than the conventional sample holder 100 made of stainless steel, so the weight can be reduced. The term "mainly composed of aluminum" means, for example, that aluminum is the element with the highest content rate among the elements forming the tubular body 202, the receiving plate 204, and the bottom plate 210, for example. It may also mean that the content of aluminum contained in, for example, the cylindrical body 202, the pan 204, and the bottom plate 210 is at least a predetermined percentage (for example, the mass percent concentration is 10%).

As described above, the receiving plate 204 is fitted with the elastic body 206 , the elastic body 206 is engaged with the support member 208 , and the bottom plate 210 is fixed to the support member 208 . The supporting member 208 is fixed to the tubular body 202 by fitting the claw portions 218 of the supporting member 208 into the depressions (fitting portions 404 ) of the tubular body 202 . The user can remove the support member 208 from the tubular body 202 by separating the tubular body 202 from the supporting member 208 while pressing the pressing portion 226, so that the sample 402 placed on the tray 204 can be removed. be able to. The operation of separating the support member 208 and the cylindrical body 202 while the pressing portion 226 is being pushed is easier than the operation of disassembling the sample holder 100 fixed by screws or screws. Therefore, according to the present disclosure, sample 402 can be easily exchanged.

Further, by arranging the bottom plate 210 on the lower surface of the support member 208, deterioration of the support member 208 can be reduced. Specifically, FIG. 6 is a diagram showing a state in which the sample holder 100 according to the present disclosure is installed on a sample table 602 of a top-illuminated fluorescent X-ray spectrometer. The sample holder 100 is placed in a hole provided in the sample stage 602 . Since the supporting member 208 is formed of resin so as to be elastically deformable, it is more significantly deteriorated by exposure to X-rays than other structural members formed of metal. However, according to the present disclosure, the support member 208 is positioned between the tray 204 and the bottom plate 210 , and the portion other than the pressing portion 226 is surrounded by the tubular body 202 , the tray 204 and the bottom plate 210 . Further, since the pressing portion 226 is arranged at the lower end of the sample holder 100 , the pressing portion 226 exposed from the cylindrical body 202 is positioned below the hole of the sample stage 602 . While the X-ray fluorescence spectrometer is irradiating the sample 402 with X-rays, there are X-rays traveling in various directions inside the measurement chamber. strong), and since X-rays irradiated below the hole of the sample table 602 are rare (weak in intensity), the intensity of the X-rays irradiated to the exposed pressing portion 226 is weak. Therefore, according to the configuration of the present disclosure, deterioration of the support member 208 due to X-rays can be reduced. Furthermore, by covering the bottom surface of the sample holder 100 with the bottom plate 210, it is possible to prevent the inside of the fluorescent X-ray spectrometer from being contaminated with powder that has peeled off or chipped off from the sample 402. FIG.

100 sample holder, 202 cylindrical body, 204 saucer, 206 elastic body, 208 support member, 210 bottom plate, 212 cylindrical body, 214 upper surface body, 216 exposed portion, 218 claw portion, 220 bow portion, 222 base portion, 224 curved portion, 226 pressing portion, 228 locking portion, 230 hole provided in the bottom plate, 302 screw hole, 402 sample, 404 fitting portion, 602 sample stage.

Claims (11)

a cylindrical body having a hole partially provided in the upper end surface and having an open lower end;
a saucer disposed inside the cylindrical body on which a sample is placed;
an elastic body that urges the tray upward;
a support member made of resin, having a bow portion that is provided with a claw portion at the end portion and that elastically deforms inward when pressed, and that is in contact with the lower end of the elastic body;
has
A sample holder for fluorescent X-ray analysis, wherein the tubular body is formed with a fitting portion into which the claw portion is fitted and an exposed portion where a part of the bow portion is exposed to the outside. . 2. The sample holder according to claim 1, wherein the tubular body has a cylindrical tubular body and a top body provided with a hole. 2. A sample holder according to claim 1, wherein said tubular body is integrally formed. 4. The sample holder according to any one of claims 1 to 3, wherein the receiving plate further has a concave portion on which the sample is placed on the surface on which the sample is placed. The saucer has a convex portion on its bottom surface,
the upper end of the elastic body is fitted with the convex portion of the receiving plate;
4. The sample holder according to any one of claims 1 to 3, characterized in that: The support member has a claw-shaped locking portion,
a lower end of the elastic body is locked by the locking portion of the support member;
4. The sample holder according to any one of claims 1 to 3, characterized in that: 4. The sample holder according to any one of claims 1 to 3, further comprising a bottom plate arranged below the support member. 8. The sample holder according to claim 7, wherein said cylindrical body, said receiving plate and said bottom plate are made of metal. 9. The sample holder according to claim 8, wherein said cylindrical body, said receiving plate and said bottom plate are made of an alloy containing aluminum as a main component. 4. The sample holder according to any one of claims 1 to 3, wherein the fitting portion is a recess into which the claw portion fits. 4. The sample holder according to any one of claims 1 to 3, wherein the exposed portion is a notch that partially exposes the bow portion to the outside.

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