JPS601492Y2 - Sample exchange device for fluorescent X-ray analyzers, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sample exchange device for a fluorescent X-ray analyzer, etc., which has a simple structure and is capable of continuously exchanging samples.

In a fluorescent X-ray analyzer, the X-ray spectroscopic system is isolated from the atmosphere and placed in a vacuum or helium gas to efficiently measure fluorescent X-rays from a sample.

For this reason, such an apparatus requires a sample exchange device in order to continuously analyze a large number of samples.

Conventionally, there are structures in which a large number of samples are introduced into a container at once and analyzed sequentially, and structures in which analyzed samples are replaced with new samples one after another during the analysis of a certain sample.

The present invention relates to the latter, and provides a device that is simple in structure, inexpensive, and easy to maintain.

FIG. 1 schematically shows a fluorescent X-ray analyzer, in which 1 is a sample chamber, 2 is a spectroscopic chamber, and the two are connected, and the inside thereof is kept in a vacuum or in a desired gas atmosphere.

A rotary table 3 is placed inside the sample chamber and rotated around an axis 4.

The rotary table 3 holds a plurality of samples (actually supported by holders) S□, S2..., and one of them, for example, Sl, is at the analysis position. At this time, some other sample, for example S2, is placed in the sample exchange position, and by opening the exchange lid 5 said sample S2 can be exchanged with another sample.

Reference numeral 6 denotes an X-ray generation source that irradiates the sample S2 at the analysis position with X-rays.

The fluorescent X-rays generated from sample S2 by this X-ray irradiation are
The light passes through a solar slit 7, is guided to a spectroscopic crystal 8, and is separated into spectra.

Those of the spectroscopic X-rays that have passed through the solar slit 9 are taken out of the spectroscopic chamber through an X-ray transmission window 10, enter a detector 11, and are detected.

The present invention relates to an apparatus for continuously exchanging the sample S2, which is explained in detail below in FIG.

In the figure, reference numeral 12 denotes a positioning fitting, on which a sample holder holder 13 is placed.

The holder is attached to the rotary table 3 by two leaf springs 14a and 14b, and is movable in a direction perpendicular to the table movement direction, that is, in the axial direction of the rotary shaft 4.

A sample exchange chamber 15 is provided in the upper sample chamber of the holder, and a lid 16 is attached to the exchange chamber.

A sample holder 18 holding a sample 17 through the exchange chamber 15 is fitted into the sample holder holder 13 .

In the sample chamber on the opposite side of the exchange chamber 15 with the holder 13 in between, two pressing bodies 19 and 20 are provided coaxially and independently movable up and down (moveable in the axial direction).

This pressing body 19 is in airtight contact with the lower end surface of the holder 13 and presses the upper surface of the holder against the lower surface of the exchange chamber 15, and its lower surface is in contact with the cams 21a and 21b. .

Further, the pressing body 20 is made of gold by removing the sample holder 18 from the holding body 13 and pushing it into the exchange chamber 15, and its lower end is in contact with the cam 22.

The cams 21a and 21b are disks with a portion cut off as shown in FIG. 5, and 22 is an eccentric cam.

These cams are fixed to a shaft 23 and integrally driven by a handle 24.

The operation of exchanging a sample in such a configuration will be explained.

In the state shown in Fig. 2, the handle 24 is in the 1st position and the cam is in the 5th position.
As shown in Figure a, 21a, 21b and 22 are all shafts 23
The portions having the shortest distance from each other are in contact with each of the pressing bodies 19 and 20.

Therefore, both of the pressing bodies are separated from the holding body 13 and the sample holder 18 as shown in the figure.

Next, when the handle is rotated to position 2, the cam becomes as shown in FIG. Then, as shown in FIG. 3, the holder 13 is pressed against the exchange chamber.

In this state, the pressing body 19. Holder 13. exchange room 1
5 and the lid 16 is isolated from the sample chamber 1.

Further, when the handle 24 is rotated 180 degrees from the 3' position, that is, the state shown in FIG. 2, the cam 21a is rotated as shown in FIG. 5C.
, 21b does not change, so the airtight space is maintained as it is, but since the cam 22 makes contact at the point farthest from the shaft 23, the pressing body 20 is pushed up, thereby moving the sample holder 18 as shown in FIG. Above the holder, as in
It is pushed out into the exchange room 15.

If air is leaked into the exchange chamber and the lid 16 is opened, the sample holder 18 can be taken out to the outside.

Next, the holder with a new sample is inserted into the sample exchange chamber and fitted into the holder 13.

Then, the lid 16 is closed, and the air inside the exchange chamber is exhausted from the exhaust port 16a provided in the lid.

Thereafter, when the handle 24 is rotated in the opposite direction to that described above, the relationship between the cams 21a, 21b, and 22 and the respective pressing bodies 19 and 20 changes from FIG. 5C to b to the state shown in FIG. 5A.

Therefore, the sample holder 18 is completely fitted into the holder 13, and the holder 13 is lowered by the force of the leaf springs 14a, 14b and supported on the positioning fitting 12.

In this state, by rotating the rotary table 3, the sample can be newly transported to the analysis position shown in FIG.

With the configuration described in detail above, the main operation of sample exchange can be performed simply by rotating the handle 24, and a device with a simple structure and good operability can be obtained.

[Brief explanation of drawings]

Figure 1 is a diagram showing the outline of a general fluorescent X-ray analyzer, Figure 2
4 through 4 are explanatory diagrams of the structure and operation of an example of the present invention, and FIG. 5 is an explanatory diagram of a part of the operation. 1...Sample chamber, 3...Rotary table,
4...Rotating axis, 12...Positioning bracket,
13... Sample holder holder, 14a, 14b
...Plate spring, 15... Exchange room, 16.
...Lid, 17...Sample, 18...
・Sample holder, 19, 20... Pressing body, 21
a, 21b and 22...force l1.23...
...Shaft, 24...Handle.

Claims (1)

[Scope of utility model registration request] A container whose interior is evacuated or filled with a desired gas, a moving body placed within the container for moving the sample between an exchange position and an analysis position, and a container portion corresponding to the exchange position. a sample exchange chamber provided in the movable body; a sample holder holder capable of forming an airtight chamber therein by pressing against the exchange chamber held by the moving body; and a sample holder holder held in the holder in a removable manner a sample holder, a first pressing body for pushing up the sample holder holder provided on the opposite side of the exchange chamber with the movable body in between, and a first pressing body provided coaxially with the first pressing body, A sample exchange device for a fluorescent X-ray analyzer, etc., comprising a second pressing body for pushing up a holder, cams in contact with both pressing bodies, and a single drive shaft to which both the cams are fixed.