X-ray analysis device

Abstract

To provide an X-ray analyzer that can prevent a sample from falling from a mounting part.SOLUTION: An X-ray analyzer comprises: a sample container 10 that accommodates a sample S; a mounting part 24 that can mount the sample container 10; an X-ray irradiation source that irradiates the sample S with an X-ray from below the mounting part 24; a detector that detects a fluorescent X-ray generated from the sample S below the mounting part; and a holder 50 that is mounted on the mounting part 24 and accommodates the sample container 10. The mounting part 24 is provided with an opening 24h. The sample container 10 has a container body 12 that surrounds the sample S and has a shape opening downward, and a container film 14 that closes the opening in the container body 12 and supports the sample S. The holder 50 has a surrounding cylinder 52 that has an outer shape larger than the opening 24h, surrounds the sample container 10, and has a shape opening downward, and a holder film 54 that closes the opening in the surrounding cylinder 52.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an X-ray analysis device. [Background technology]

[0002] Conventionally, there is known an X-ray analysis device that analyzes fluorescent X-rays generated from a sample irradiated with X-rays. For example, JP 2018-63196 A discloses an X-ray analysis device including a housing having a mounting portion on which a sample can be mounted, an X-ray tube that irradiates X-rays to the sample through an opening provided in the mounting portion, and a detector that detects fluorescent X-rays generated from the sample. The X-ray tube and the detector are disposed below the mounting portion. The sample is mounted on the mounting portion via a film. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-63196 A Summary of the Invention [Problem to be solved by the invention]

[0004] In an X-ray analysis device such as that described in JP 2018-63196 A, a part of the sample may fall through the opening due to damage to the film or the like and adhere to the detector. In this case, there is a concern that the analytical accuracy may decrease.

[0005] An object of the present invention is to provide an X-ray analysis apparatus capable of preventing a sample from falling off a mounting portion. [Means for solving the problem]

[0006] A first aspect of the present invention relates to an X-ray analysis apparatus comprising: a sample container for containing a sample; a mounting section on which the sample container can be mounted; an X-ray irradiation source that irradiates X-rays onto the sample in the sample container from below the mounting section; a detector that detects fluorescent X-rays generated from the sample below the mounting section; and a holder that is mounted on the mounting section and accommodates the sample container, wherein the mounting section has an opening for passing X-rays irradiated from the X-ray irradiation source, the sample container has a container body that surrounds the sample and has an opening facing downward, and a container film that closes the opening of the container body and supports the sample, and the holder has an enclosing tube that has an outer shape larger than the opening, surrounds the sample container, and has an opening facing downward, and a holder film that closes the opening of the enclosing tube. Effect of the Invention

[0007] In this X-ray analysis device, a holder film is further disposed below the container film that supports the sample, so that even if the container film is damaged, the sample is prevented from falling off the mounting portion. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating a schematic configuration of an X-ray analysis apparatus according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of the vicinity of the sample container and the holder. [Diagram 3] FIG. 11 is a cross-sectional view showing a schematic modification of the holder. [Figure 4] FIG. 11 is a cross-sectional view showing a schematic modification of the sample container. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding components are designated by the same reference numerals.

[0010] 1 is a diagram showing a schematic configuration of an X-ray analysis apparatus according to one embodiment of the present invention. As shown in FIG. 1, the X-ray analysis apparatus 1 includes a sample container 10, a case 20, an X-ray irradiation source 30, a detector 40, and a holder 50.

[0011] The sample container 10 is a container that contains a sample S. As shown in FIG.

[0012] The container body 12 has a shape that surrounds the sample S and opens downward. The container body 12 is made of, for example, polypropylene (PP).

[0013] The container film 14 closes the opening 12a (see FIG. 2) of the container body 12 and supports the sample S. In this embodiment, the container film 14 is made of polypropylene. The container film 14 is welded to the lower end of the container body 12. The container film 14 may be made of polyethylene terephthalate (PET) or the like.

[0014] The case 20 houses the sample container 10 etc. The case 20 is made of metal. As shown in FIG. 1, the case 20 has a housing section 22, a mounting section 24, and a lid section 26.

[0015] The accommodation section 22 is configured as the lower part of the case 20. The accommodation section 22 accommodates the X-ray radiation source 30 and the detector 40. The accommodation section 22 has a shape that opens upward.

[0016] The mounting portion 24 is connected to the upper end of the storage portion 22. The mounting portion 24 is a portion on which the sample container 10 is placed. The mounting portion 24 is provided with an opening 24h for passing X-rays irradiated from the X-ray irradiation source 30. The opening 24h is set to be smaller than the outer shape of the container body 12. In other words, the outer shape of the container body 12 is larger than the opening 24h.

[0017] The cover 26 surrounds the sample container 10. The lower end of the cover 26 is connected to the outer edge of the mounting portion 24.

[0018] The X-ray irradiation source 30 is accommodated in the accommodation portion 22. The X-ray irradiation source 30 irradiates the sample S placed in the sample container 10 with X-rays from below the mounting portion 24. An example of the X-ray irradiation source 30 is an X-ray tube.

[0019] The detector 40 is accommodated in the accommodation portion 22. The detector 40 detects fluorescent X-rays generated from the sample S that has received X-rays irradiated from the X-ray irradiation source 30, below the mounting portion 24. From the viewpoint of improving the analytical accuracy of the sample S, the detector 40 is preferably disposed in the vicinity of the opening 24h.

[0020] The holder 50 is placed on the placement portion 24 and accommodates the sample container 10. The holder 50 is configured to be removable from the placement portion 24. As shown in FIG. 2, the holder 50 has an enclosing tube 52 and a holder film 54.

[0021] The surrounding tube 52 has an outer shape larger than the opening 24h. The surrounding tube 52 surrounds the sample container 10 and has a shape that opens downward. In this embodiment, the surrounding tube 52 is formed in a cylindrical shape. The surrounding tube 52 is made of, for example, polypropylene. The height of the surrounding tube 52 is larger than the height of the sample container 10. The position of the surrounding tube 52 relative to the opening 24h is determined by a positioning mechanism not shown. The inner circumferential surface 52S of the surrounding tube 52 may be gradually reduced in diameter as it approaches the placement portion 24. In this way, the sample container 10 is guided to a predetermined position when the sample container 10 is placed in the surrounding tube 52 from above the surrounding tube 52.

[0022] The holder film 54 closes the opening 52a (see FIG. 2) of the enclosing tube 52. That is, two films (container film 14 and holder film 54) are laminated above the opening 24h. The holder film 54 is made of, for example, polypropylene. The holder film 54 is welded to the lower end of the enclosing tube 52. The thickness of the holder film 54 is approximately the same as that of the container film 14. For example, the thickness of the holder film 54 is preferably set to be 0.5 to 2 times the thickness of the container film 14. The holder film 54 may be made of polyethylene terephthalate (PET) or the like.

[0023] As described above, in the X-ray analysis device 1 of this embodiment, since the holder film 54 is further disposed below the container film 14 that supports the sample S, even if the container film 14 is damaged, the sample S is prevented from falling off the mounting portion 24. This prevents the detector 40 from becoming dirty.

[0024] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The scope of the present invention is indicated by the claims, not by the description of the embodiments above, and further includes all modifications within the meaning and scope of the claims.

[0025] 3, the holder 50 may further include a clamping ring 56. In this example, the outer shape of the holder film 54 is set to be larger than the outer shape of the enclosing tube 52. The clamping ring 56 clamps the edge of the holder film 54 between its inner circumferential surface and the outer circumferential surface of the enclosing tube 52.

[0026] 4, the sample container 10 may further include a clamping ring 16. In this example, the outer shape of the container film 14 is set to be larger than the outer shape of the container body 12. The clamping ring 16 clamps the edge of the container film 14 between its inner circumferential surface and the outer circumferential surface of the container body 12.

[0027] [Aspects] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0028] (Item 1) The X-ray analysis apparatus according to one embodiment includes a sample container for holding a sample, a mounting section on which the sample container can be mounted, an X-ray irradiation source that irradiates X-rays onto the sample in the sample container from below the mounting section, a detector that detects fluorescent X-rays generated from the sample below the mounting section, and a holder that is mounted on the mounting section and accommodates the sample container, the mounting section having an opening for allowing X-rays irradiated from the X-ray irradiation source to pass through, the sample container having a container body that surrounds the sample and has an opening facing downward, and a container film that closes the opening of the container body and supports the sample, and the holder has an enclosing tube that has an outer shape larger than the opening, surrounds the sample container, and has a shape that opens downward, and a holder film that closes the opening of the enclosing tube.

[0029] In this X-ray analysis device, a holder film is further disposed below the container film that supports the sample, so that even if the container film is damaged, the sample is prevented from falling off the mounting portion.

[0030] (Item 2) In the X-ray analysis apparatus described in item 1, the holder film may be welded to a lower end of the surrounding cylinder.

[0031] In this embodiment, the process of attaching the holder film to the enveloping tube is omitted.

[0032] (Item 3) In the X-ray analysis apparatus described in item 1, the holder may further have a clamping ring attached around the surrounding tube, and the clamping ring may clamp the edge of the holder film between the inner surface of the clamping ring and the outer surface of the surrounding tube.

[0033] In this embodiment, it is possible to attach a holder film made of a material that is difficult to weld to the enveloping tube (for example, a material different from the material that constitutes the enveloping tube) to the enveloping tube.

[0034] (Item 4) In the X-ray analysis apparatus according to any one of items 1 to 3, it is preferable that the holder is configured to be removable from the placement portion.

[0035] In this way, it becomes possible to clean the holder film or replace the holder itself without damaging the X-ray radiation source or detector.

[0036] (Item 5) In the X-ray analysis apparatus according to any one of items 1 to 4, it is preferable that the outer shape of the container body is larger than the opening.

[0037] In this way, even if the holder film is not attached to the enclosing cylinder, the sample can be analyzed by placing the sample container on the placement portion. [Explanation of symbols]

[0038] 1 X-ray analysis device, 10 sample container, 12 container body, 14 container film, 16 clamping ring, 20 case, 22 storage section, 24 placement section, 24h opening, 26 lid section, 30 X-ray irradiation source, 40 detector, 50 holder, 52 enclosing tube, 54 holder film, 56 clamping ring, S sample.

Claims

1. A sample container for containing a sample; A mounting portion on which the sample container can be mounted; an X-ray irradiation source that irradiates the sample in the sample container with X-rays from below the sample placement portion; a detector that detects fluorescent X-rays generated from the sample below the sample placement portion; a holder that is placed on the placement part and that accommodates the sample container; the placement portion is provided with an opening for passing the X-rays irradiated from the X-ray irradiation source; The sample container comprises: A container body having a shape that surrounds the sample and opens downward; a container film that closes the opening of the container body and supports the sample, The holder is a surrounding cylinder having an outer shape larger than the opening, surrounding the sample container, and having a shape opening downward; a holder film that closes the opening of the enclosing tube; The container film is in contact with the holder film.

2. The X-ray analysis apparatus according to claim 1 , wherein the holder film is welded to a lower end of the surrounding cylinder.

3. The holder further includes a clamping ring attached to the periphery of the enclosing tube; The X-ray analysis apparatus according to claim 1 , wherein the clamping ring clamps an edge of the holder film between an inner peripheral surface of the clamping ring and an outer peripheral surface of the surrounding cylinder.

4. The inner circumferential surface of the enclosing cylinder is gradually reduced in diameter as it approaches the placement portion, 4. The X-ray analysis apparatus according to claim 1, wherein the height of the surrounding cylinder is greater than the height of the sample container.

5. The X-ray analysis apparatus according to claim 1 , wherein an outer shape of the container body is larger than that of the opening.

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