JPH0448867Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an apparatus for detecting cracks in a sample used for fluorescence X-ray analysis or the like.

B. Prior Art In order to recognize the shape of the sample for fluorescence X-ray analysis, (1) an operator visually determines the monitoring image of the sample from a television camera on a monitor, or (2) the above-mentioned monitoring image. A computer compares the image with a reference image stored in the memory and generates a signal, or (3) mechanically places a measuring instrument on the sample and measures its dimensions.

C. Problems that the invention aims to solve However, among the above cases, (1) goes against the automation of analysis and requires labor, (2) requires high equipment costs, and (3) Each of these had its own problems, such as the tendency for the measuring instruments to malfunction.

It is an object of the present invention to eliminate the above-mentioned problems and to provide a detection device that can determine the abnormal shape of a sample with a simple mechanism and is free from failures.

D. Means for solving the problems In order to achieve the above object, the structure of the present invention is as follows. That is, a sample transfer means, a stopper for temporarily stopping a flat sample being moved by the sample transfer means, a stopper driving section for advancing the stopper into the movement path of the sample, and a check for abnormalities in the shape of the sample. It includes a detection section to be inspected, and an alarm means for issuing an alarm when the detection section detects an abnormal shape of the sample, and in the detection section, a detector mounting plate is provided above the sample position when the sample is stopped, At least three detectors are mounted on the instrument mounting plate to face the flat surface of the sample at the same distance.

E. Effect The flat sample being moved by the sample transfer means is temporarily stopped by the stopper at a predetermined position on the moving path. Then, if at least one of the detectors detects an abnormal shape of the sample, an alarm is issued.

F. Embodiment The present invention will be described below based on an embodiment shown in the drawings.

As shown in FIGS. 1 to 3, a chute 10 on which the sample A can slide down, a stopper 20 for temporarily stopping the sample on the chute,
A stopper driving section 30 for advancing the sample receiving section 21C of the stopper into the moving path of the sample A, a detecting section 40 for inspecting whether there is any abnormality in the shape of the sample, and a detecting section 40 for inspecting whether there is an abnormality in the sample A. It has an alarm means 50 that issues an alarm when the shape is detected.

The chute 10 consists of a gutter-shaped chute main body 11 inclined at an angle α with respect to the horizontal, and a chute cover 12 fixed to cover the main body. The chute cover 12 also serves as a mounting base for the stopper 20 and the stopper operating section 30.

The main body 21 of the stopper 20 has a crank shape in which the lower main body 21b is slightly shifted toward the downstream side of the chute with respect to the upper main body 21a, and the lower end thereof faces toward the upstream side of the chute and is parallel to the chute main body 11, and the tip has the width of the chute. A sample receiving portion 21c that is bifurcated along the direction is integrally formed with the upper main body 21.
A pivot shaft 23 extending in the width direction of the chute is protruded from the lower part of a. The stopper main body 21 is supported via the pivot shaft 23 to a stopper bracket 24 that is vertically installed from the top plate 12a of the chute cover 12, and is swingable in a vertical plane including the length direction of the chute. It's summery. A vertically long guide groove 22 is provided in the upper part of the upper body 21a to extend along the width direction of the chute.

The stopper drive unit 30 includes a piston cylinder mechanism 31 fixed to the top of the chute cover 12 with a piston rod 31a directed toward the downstream side of the chute, and a connection bracket 32 fixed to the tip of the piston rod 31a. The connecting bracket 32 and the upper main body 21a of the stopper 20 are connected by a pin 33 inserted through the guide groove 22 and through the connecting bracket 32.

The detection unit 40 includes a detector mounting plate 41 fixed to the chute main body 11 in a saddle manner above the position where the sample A is temporarily stopped, and a detector 43 mounted on the mounting plate. The lower surface of the flat plate portion 41a of the detector mounting plate 41 facing the sample A is parallel to the flat upper surface of the sample A and is maintained at a predetermined distance. As shown in FIG. 4, the flat plate part 41a of the detector mounting plate 41 is provided with a large number of detector mounting holes 42 at equal intervals in the circumferential direction on the circumference at equal distances from the center in terms of radiation. In these mounting holes 42, a plurality of (four in the embodiment) detectors 43, each consisting of a reflective photoelectric switch, for example, are mounted equidistantly from the center of the flat plate portion 41a, and adjacent ones are maintained at equal intervals in the circumferential direction. , is mounted with its light-emitting surface and light-receiving surface facing downward so that they are equidistant from sample A. The detector 43 is electrically connected to alarm means 50 such as a buzzer.

The operation mode will be explained above.

In general _, the sample used for a fluorescence
As long as this is ensured, there may be some defects. Furthermore, even if there is a crack, it is sufficient as long as it is not completely separated, and as long as it has the required size, no further precision is required. Therefore, prior to detection, the detector 43 is placed on the detector mounting plate 41 at a position where the required area _A1 of the sample is secured.
Moreover, they are respectively attached to attachment holes provided at equal intervals.

Sample A is obtained by cutting a material to a predetermined thickness using a cutting machine, and the cutting plane serving as the analysis surface is polished. Cracks may occur in this sample due to processing heat during cutting and polishing, and sometimes it will completely crack and a portion will be missing. For samples with large defects, not only cannot accurate analytical values be guaranteed, but also hinders efficient analysis through labor-saving or unmanned methods. Therefore, prior to the analytical test, the suitability or unsuitability of the sample as an analytical sample is examined using the detection device of the present invention.

The flat sample A having the predetermined thickness is supplied to the chute 10 of the present invention via a transport mechanism (not shown). When a sensor (not shown) detects this, the piston cylinder mechanism 31 operates, and the piston rod 31
a. Stopper body 2 via connection bracket 32
1 swings clockwise in FIG. 1 about the pivot shaft 23, and its sample receiving portion 21c advances into the sample moving path as shown. Therefore, the sample A is supported by the sample receiving portion 21c and temporarily stopped. When a temporary stop of the sample is sensed, the detector 43 receives a command to emit light to the sample A and receives the reflected light. As shown in Fig. 5 a and b, in a sample where there is no defective part at all or even if there is a small defective part, the light from all the detectors 43 is simultaneously detected as reflected light, so the alarm means is not activated. , the sample is determined to be normal. On the other hand, in the cases shown in FIGS. 5c and 5d, in which there is at least one portion where the reflected light is not normally detected because the missing portion is large, the alarm means 50 is activated and an alarm is issued. Abnormal samples are removed manually or automatically. Thereafter, the stopper body 21 swings in the opposite direction to allow the sample A to slide down, and the normal sample is transferred to the next conveyor (not shown).

In the above embodiment, a chute was used as the means for transferring the sample, but it may also be used as a conveyor for moving the sample in the horizontal direction, and the conveyor is also temporarily stopped at the same time as the stopper body 21 stops the sample A. good.

At least three detectors 43 are mounted on the detector mounting plate 41, and the detection accuracy improves as the number increases. Further, a transmission type photoelectric switch, a proximity switch, an air switch, or the like may be used as a detector.

G. Effects of the invention As described above, the present invention includes a stopper that temporarily stops a moving flat sample, a stopper drive unit that advances the stopper into the movement path of the sample, and an inspection for abnormalities in the shape of the sample. and an alarm unit that issues an alarm when the detection unit detects an abnormal shape of the sample. Therefore, the sample is reliably suspended in a predetermined position where it can be inspected and any abnormalities removed. Therefore, the mechanism is simple and inexpensive, and the inspection is performed automatically. In addition, a detector mounting plate is provided above the sample position when the sample is stopped, and at least three detectors are mounted on the detector mounting plate so as to face each other at equal distances from the flat upper surface of the sample. , anomalies can be detected without the measuring instrument touching the sample directly, and the conventional mechanical operation that tends to cause measuring instrument failure is eliminated.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figures are a cross-sectional view of FIG. 1, a side view of FIG. 3, a plan view of the detector mounting plate, and a diagram illustrating the operation of the detector. A...Sample, 10...Chute, 11...Chute body, 12...Chute cover, 20...Stopper, 21...Stopper main body, 21c...Sample receiver, 30...Stopper drive unit, 31... Piston cylinder mechanism, 40...detection section, 41...detector mounting plate, 43...detector, 50...alarm means.

Claims (1)

[Scope of utility model registration request] A sample transfer means, a stopper for temporarily stopping a flat sample being moved by the sample transfer means, a stopper driving section for advancing the stopper into a sample movement path, and inspecting the shape of the sample for abnormality. It includes a detection section and an alarm means that issues an alarm when the detection section detects an abnormal shape of the sample, and in the detection section, a detector mounting plate is provided above the sample position when the sample is stopped; An apparatus for detecting cracks in a sample, characterized in that at least three detectors are mounted on a plate and face each other at an equal distance from the flat surface of the sample.