Patent Application
20230236142
The present invention relates to an X-ray analyzer.
Conventionally, an X-ray analyzer for analyzing fluorescent X-rays generated from a sample irradiated with X-rays has been known. For example, Japanese Unexamined Patent Application Publication No. 2018-63196 discloses an X-ray analyzer provided with a housing having a placement portion configured to place a sample thereon, an X-ray tube for irradiating the sample with X-rays through an opening provided in the placement portion, and a detector for detecting fluorescent X-rays generated form the sample. The X-ray tube and the detector are arranged below the placement portion. The sample is placed on the placement portion via a film.
Patent Document 1: Japanese Unexamined Patent Application Publication No. 2018-63196
In an X-ray analyzer as described in Japanese Unexamined Patent Application Publication No. 2018-63196, there is a case in which a part of a sample drops through the opening due to the breakage of the film or the like and adheres to the detector. In such a case, there is a concern that the analysis accuracy deteriorates.
An object of the present invention is to provide an X-ray analyzer capable of suppressing dropping of a sample from a placement portion.
According to one aspect of the present invention, an X-ray analyzer is provided with:
In this X-ray analyzer, the holder film is further arranged below the container film supporting the sample. Therefore, even in a case where the container film is damaged, dropping of the sample from the placement portion is suppressed.
Some embodiments of the present invention will be described with reference to the attached drawings. Note that in the drawings referred to below, the same or corresponding member is denoted by the same reference symbol.
The sample container 10 is a container for accommodating a sample S. As shown in
The container body 12 surrounds the sample S and has a shaped opened downward. The container body 12 is made of, for example, polypropylene (PP).
The container film 14 closes the opening 12a (see
The casing 20 accommodates the sample container 10 and the like. The casing 20 is made of a metallic material. As shown in
The housing 22 is constituted by the lower portion of the casing 20. The housing 22 accommodates the X-ray irradiation source 30 and the detector 40. The housing 22 has a shape opened upward.
The placement portion 24 is connected to the upper end of the housing 22. The placement portion 24 is a portion on which the sample container 10 is placed. The placement portion 24 is provided with an opening 24h for passing the X-rays emitted 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.
The cover 26 surrounds the sample container 10. The lower end of the cover 26 is connected to the outer edge of the placement portion 24.
The X-ray irradiation source 30 is accommodated in the housing 22. The X-ray irradiation source 30 irradiates the sample S placed in the sample container 10 with the X-rays from below the placement portion 24. As an example of the X-ray irradiation source 30, an X-ray tube is exemplified.
The detector 40 is accommodated in the housing 22. The detector 40 detects the fluorescent X-rays generated from the sample S that received the X-rays emitted from the X-ray irradiation source 30 below the placement portion 24. From the viewpoint of enhancing the analysis accuracy of the sample S, the detector 40 is preferably arranged in the vicinity of the opening 24h.
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
The enclosure cylinder 52 has a profile larger than the opening 24h. The enclosure cylinder 52 surrounds the sample container 10 and has a shape opened downward. In this embodiment, the enclosure cylinder 52 is formed in a cylindrical shape. The enclosure cylinder 52 is made of, for example, polypropylene. The height of the enclosure cylinder 52 is greater than the height of the sample container 10. The position of the enclosure cylinder 52 with respect to the opening 24h is determined by a positioning mechanism (not shown). The inner peripheral surface 52S of the enclosure cylinder 52 may gradually decrease in diameter as it approaches the placement portion 24. With this configuration, the sample container 10 is guided to a predetermined position when placing the sample container 10 in the enclosure cylinder 52 from above the enclosure cylinder 52.
The holder film 54 closes the opening 52a (see
As described above, in the X-ray analyzer 1 according to this embodiment, the holder film 54 is further arranged below the container film 14 supporting the sample S. Therefore, even in a case where the container film 14 is, for example, damaged, dropping of the sample S from the placement portion 24 is suppressed. Therefore, contamination or the like of the detector 40 is suppressed.
It should be understood that the embodiments disclosed here are examples in all respects and are not restrictive. The scope of the present invention is indicated by claims rather than by the above-described descriptions of the embodiments and includes all modifications within the meanings and scopes equivalent to claims.
For example, as shown in
Further, as shown in
It will be understood by those skilled in the art that the plurality of exemplary embodiments described above is illustrative of the following aspects.
An X-ray analyzer according to a first aspect of the present invention comprising:
In this X-ray analyzer, the holder film is further provided below the container film supporting the sample. Therefore, even in a case where the container film is damaged, dropping of the sample from the placement portion is suppressed.
In the X-ray analyzer as recited in the above-described Item 1, it may be configured such that the holder film is welded to a lower end portion of the enclosure cylinder.
In this aspect, the operation of attaching the holder film to the enclosure cylinder can be omitted.
In the X-ray analyzer as recited in the above-described Item 1, it may be configured such that the holder further includes a clamping ring attached to a circumference of the enclosure cylinder, and the clamping ring sandwiches an edge of the holder film between an inner peripheral surface of the clamping ring and an outer peripheral surface of the enclosure cylinder.
In this aspect, it is possible to attach a holder film made of a material that is difficult to weld to the enclosure cylinder (for example, a material that differs from the material constituting the enclosure cylinder) to the enclosure cylinder.
In the X-ray analyzer as recited in any one of the above-described Items 1 to 3, it may be configured such that the holder is configured to be detachable from the placement portion.
With this configuration, cleaning of the holder film, the replacement of the holder itself, etc., can be performed without causing damage to the X-ray irradiation source or the detector.
In the X-ray analyzer as recited in any one of the above-described Items 1 to 4, it is preferable that an outer shape of the container body be larger than the opening of the placement portion.
With this configuration, even in a case where the holder film is not attached to the enclosure cylinder, the sample can be analyzed by placing the sample container on the placement portion.
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| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2020/025763 | 7/1/2020 | WO |
