JPH0584096U - X-ray analyzer interlock mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an interlock mechanism of an X-ray analyzer that prevents X-rays from leaking even if the operator is careless. [Structure] An openable / closable shield cover 9, a hook 10 provided at an open / close end of the shield cover 9, and a slidably provided inside an apparatus main body 8 that engages with the hook 10 when the shield cover 9 is closed. A lock plate with a return lever, a shutter 6 which is attached to the lock plate 16 and closes the detection unit 5 containing the X-ray source at a position where the lock plate 16 engages with the hook 10, and a shield cover 9 opens. The lock plate 16 to the hook 10
Device for engaging the lock plate 16 with the lock plate 16 when the shield cover 9 is closed, and when the shield cover 9 is closed, it is pushed down by the hook 10 to unlock the lock plate 16 and engage the hook 10 with the lock plate 16. An interlock mechanism is constituted by a stopper 27 provided in the main body 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an interlock mechanism for preventing X-rays from leaking from an X-ray analyzer.

[0002]

[Prior Art]

 In principle, the X-ray analyzer irradiates the sample 2 with the primary X-rays from the X-ray tube 1 which is an X-ray source, and the fluorescence X emitted from the sample 2 as shown in FIG. The X-ray filter 3 is used to detect a ray with a detector (proportional counter) 4 so that component analysis and the like can be performed.

In a desktop type of such an apparatus, for example, as shown in FIG. 5, the detection unit 5 having an X-ray tube and a detector built-in does not leak X-rays to the outside. A shutter 6 is provided, and a sample stand for placing the sample 2 is placed on the upper part thereof, and further, the entire detecting section 5 is covered by a shield cover 9 provided on the apparatus main body 8 so as to be openable and closable. There is. A hook 10 is attached to the open / close end of the shield cover 9, and when the shield cover 9 is closed, the hook 10 is attached to a hooked member (not shown) provided inside a lock hole 11 provided in the apparatus body 8. ), The cover switch 12 is turned on, and an electric drive source (for example, a solenoid) or a mechanical interlocking mechanism (not shown) is operated to open the shutter 6, thereby The analysis work can be carried out by irradiating the sample 2 on the sample table with X-rays.

On the other hand, when the sample 2 is replaced, the shield cover 9 can be opened by releasing the engagement of the hooked member with the hook 10 by operating the lever 13, and at that time, The shutter 6 is closed so that X-rays do not leak outside.

[0005]

[Problems to be solved by the device]

 In the conventional device as described above, since the cover switch 12 is arranged so as to correspond to the shield cover 9 that is opened and closed, it is relatively easy to touch. Therefore, when the shield cover 9 is open, If the cover switch 12 is touched carelessly, the electric drive source may be activated to open the shutter 6 and the X-ray may leak.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an interlock mechanism of an X-ray analysis apparatus in which X-rays do not leak due to carelessness of an operator.

[0007]

[Means for Solving the Problems]

 The present invention has means for solving the above-mentioned problems as follows. That is, in the first invention, a shield cover having an X-ray blocking function is provided which can be opened and closed with respect to the main body of the X-ray analysis apparatus, a hook attached to the open / close end side of the shield cover, and When the shield cover is closed, it is slidable between a locked position that engages with the hook and an unlocked position where the engagement is released, and is urged in the direction that engages with the hook to move inside the main body. A lock plate with a return lever provided on it, and a lock plate attached to the lock plate and at a lock position where the lock plate engages with the hook. The detector is opened in order to irradiate X-rays with the X-ray, and the detector is closed at the unlocked position where the lock plate is disengaged from the hook. When the shutter cover and the shield cover are open, the lock plate is locked at an unlock position where the engagement with the hook is released, and when the shield cover is closed, the lock plate is pushed down by the hook and It is characterized by a stopper provided inside the main body to unlock the lock plate and engage the lock plate with the hook.

According to a second aspect, a shield cover having an X-ray blocking function is provided which is openable and closable with respect to the main body of the X-ray analysis apparatus, a hook attached to the open / close end side of the shield cover, and the shield. When the cover is closed, it is slidable between a lock position that engages with the hook and an unlock position where the engagement is released, and is biased in a direction that engages with the hook, and the inside of the main body A lock plate with a return lever on the sample table installed on the detector with the built-in X-ray source at the lock position that is attached to the lock plate and engages with the hook. An X-ray blocking function that opens the detector to irradiate the sample with X-rays and closes the detector at the unlocked position where the lock plate is disengaged from the hook. With a shutter, a shutter switch provided corresponding to the lock plate to detect opening and closing of the shutter, and the lock plate is disengaged from the hook when the shield cover is open. When the shield cover is closed, it is pushed down by the hook when the shield cover is closed to release the lock from the lock plate, and a stopper provided inside the main body to engage the lock plate with the hook, An interlock circuit having a lock switch provided corresponding to a stopper for detecting engagement / disengagement of the lock plate with respect to the hook, and an interlock circuit in which the lock switch and the shutter switch are connected in parallel is provided as an input power supply and an X-ray high-voltage power supply Alternatively, it is characterized in that it is installed between the device and the power supply. .

According to a third aspect of the invention, a cover switch for detecting the opening / closing of the shield cover of the second aspect is provided, and an interlock circuit is provided between the input power source and the X-ray high voltage power source or the apparatus power source. However, the cover switch and the lock switch are connected in series, and this is connected in parallel with the shutter switch.

[0010]

[Action]

 In the first invention, when the sample is placed on the sample table and the shield cover is closed, the hooks attached to the opening and closing ends of the shield cover push down the stoppers that lock the lock plate in the unlock position, and the hooks are locked. When the lock plate is released, the lock plate moves to the lock position to engage the hook, the shield cover is locked, the shutter integrated with the lock plate is opened, and the sample on the sample table is released from the X-ray source. It is possible to irradiate X-rays to analyze.

On the other hand, when the shield cover is opened for exchanging the sample, the lock plate may be moved to the unlock position by the return lever to disengage the hook. Then, the shutter integrated with the lock plate is closed to prevent leakage of X-rays, and the lock plate is locked at the unlocked position by the stopper.

When the shield cover is opened as described above, the shutter cannot be opened unless the stopper that holds the lock plate in the unlock position is pushed down. However, since the stopper is provided inside the main unit, like the lock plate, it does not come into contact with human hands or contact foreign objects, and the stopper is deliberately or unintentionally pushed down to release the shutter. Will never open.

In the second invention, since the interlock circuit is provided in addition to the configuration of the first invention, the shutter may be opened while the shield cover is open due to a mechanism adjustment error or the like. However, at that time, the interlock circuit is opened and the power supply to the X-ray high-voltage power source or the apparatus power source is stopped. As a result, the leakage of X-rays can be prevented more reliably.

Further, in the third invention, when both the shield cover and the shutter are open, or when only the shield cover is open, the cover switch may be turned on intentionally or inadvertently. Even if there is, the interlock circuit does not close because the lock switch is open, ensuring safety.

The interlock circuit in the third invention is closed when the shield cover is opened (the cover switch is off), the stopper is hooked on the lock plate (the lock switch is off), and the shutter is closed (the shutter switch is off). Is on), the shield cover is closed, the stopper is unlocked from the lock plate (the hook engages with the lock plate), and the shutter is open. On the other hand, the interlock circuit opens when both the shield cover and the shutter are opened, and when the cover switch is turned on under such a condition, both are considered as emergencies and are as described above. In addition, the X-ray itself is not generated.

[0016]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of an interlock mechanism of an X-ray analysis apparatus in which a shield cover is opened, and an X-ray tube (not shown) having a sample table 7 at the top and being an X-ray source inside is provided. ), A detector 4 (see FIG. 2), an X-ray collimator 14 and the like, and a shutter 6 that is slid to open and close the inside of the detector 5 in a box-shaped device body 8. The shield cover 9 provided on the device body 8 covers the detection portion 5 so that the detector 5 can be opened and closed. In the closed state, the hook 10 provided at the open / close end of the shield cover 9 locks the inside of the device body 8. The cover switch 12 is engaged with the plate 16 and is locked, and the cover switch 12 which is a contact type micro switch provided on the apparatus main body 8 is closed.

The shutter 6 is made of a metal plate member having an X-ray blocking function, and its main body portion 6a is formed on both side edges of the opening 15 (see FIG. 2) formed in the upper portion of the detection portion 5. A mounting portion 6b slidably inserted into the groove and bent and extended laterally is fixed to an upper portion of a lock plate 16 provided in the main body 8 of the apparatus by fastening bolts 17 and 17.

At the lower part of the lock plate 16, a pair of slides guided by a pair of upper and lower rails 19, 19 provided between the supporting members 18, 18 projectingly fixed inside the apparatus body 8. Blocks 20 and 20 are fixed, the lock plate 16 thereof is slidably supported in the direction of arrow 21, and a return lever 23 is provided on the main body 8 of the device so as to project upward and be fixed to the side portion of the substantially central portion thereof. The laterally elongated opening 22 is projected to the outside.

A spring receiving member 24 is planted at one end of the lock plate 16 described above, and the other end of the tension spring 25 having one end hooked on the side of the apparatus body 8 is hooked on the spring receiving member 24. The lock plate 16 is biased in the direction of the arrow 21, while the other end of the lock plate 16 is provided with a shutter switch 26, which is a contact type micro switch, corresponding to the shutter 6 in the position shown in the figure. Closes the opening 15 (see FIG. 2) of the detection unit 5 to close the shutter switch 26, and one end of the lock plate 16 is unlocked by a rod-shaped stopper 27 so as not to engage with the hook 10 as shown in the drawing. It is supposed to be hooked on.

The stopper 27 is inserted into a through hole of a U-shaped support bracket 28 attached to the outer surface of the one support member 18, is slidably supported in the vertical direction, and has a return bar 29. The upper end of the lock plate 16 is brought into contact with one end of the lock plate 16 in the free state so that the lock plate 16 can be locked at the unlock position U as described above. A lock switch 30 composed of a contact type micro switch is provided correspondingly at the lower end portion thereof, and when the shield cover 9 is closed, the stopper 27 is pushed down by the hook 10 and the lock switch 30 is closed. At the same time, the lock plate 16 is pulled by the tension spring 25 and moves in the direction of the arrow 21 to engage the hook 10 at the lock position L (see FIG. 2), and the shield cover 9 is locked. When the shield cover 9 is closed, the hook 10 is inserted into the inside of the hook hole 31 formed in the upper portion of the apparatus body 8.

On the other hand, the above-mentioned three switches, that is, the cover switch 12, the shutter switch 26, and the lock switch 30 constitute an interlock circuit 33 for preventing exposure to radiation as shown in FIG. The interlock circuit 33 is provided between the input power source and the X-ray high-voltage power source or the apparatus power source.

The interlock circuit 33 is formed by connecting the cover switch 12 and the lock switch 30 in series and connecting the cover switch 12 in parallel with the shutter switch 26. 30 is off and the shutter switch 26 is off, that is, both the shield cover 9 and the shutter 6 are open, and the cover switch 12 is on and the lock switch 30 is off and the shutter switch 26 is off. At this time, that is, when both the shield cover 9 and the shutter 6 are open, when the cover switch 12 is turned on, the interlock circuit 33 is considered to be an emergency due to some trouble. It has become . On the other hand, the interlock circuit 33 is closed because the shield cover 9 is open (the cover switch 12 is off), the stopper 27 is hooked on the lock plate 16 (the lock switch 30 is off), and the shutter 6 is closed (the shutter switch 26). Is on), the shield cover 9 is closed, the stopper 27 is released from the lock plate 16 (the hook 10 is engaged with the lock plate 16), and the shutter 6 is open. These are all in a normal state, and the detection unit 5 is closed by the shutter 6 or the shield cover 9 having an X-ray blocking function, so that X-rays do not leak to the outside.

The operation of the interlock mechanism of the X-ray analyzer configured as above will be described. When the sample is placed on the sample table 7 and the shield cover 9 is closed, the shield cover 9 is attached to the open / close end of the shield cover 9. The hook 10 that holds the lock plate 16 at the unlock position U pushes down the stopper 27 to release the lock, and the lock plate 16 moves to the lock position L to engage the hook 10 (Fig. 2). ), The shield cover 9 is locked, and the shutter 6 integrated with the lock plate 16 is opened. At this time, the cover switch 12 is closed, the shutter switch 26 is opened, and the lock switch 30 is closed. When 33 is closed, the sample on the sample stage 7 can be irradiated with X-rays from the X-ray tube for analysis.

On the other hand, when the shield cover 9 is opened for replacing the sample, the lock lever 16 may be moved to the unlock position U by the return lever 23 to disengage the hook 10. Then, the shutter 6 integrated with the lock plate 16 is closed to prevent leakage of X-rays, and the lock plate 16 is locked by the stopper 27 at the unlock position U. At this time, the cover switch 12 is open, the lock switch 30 is open, the shutter switch 26 is closed, and the interlock circuit 33 is closed.

When the shield cover 9 is opened as described above, the mechanism is configured such that the shutter 6 cannot be opened unless the stopper 27 that holds the lock plate 16 is pushed down. Like the lock plate 16, the lock plate 27 is provided inside the device body 8 so that it does not come into contact with human hands or foreign matter, and the stopper 27 is pushed down by carelessness or intentional operation. 6 does not open, and complete safety measures are taken together with the interlock circuit 33 described above.

Further, even if the shutter 6 opens due to some trouble while the shield cover 9 is open, the interlock circuit 33 opens at that time, so that the irradiation of X-rays from the X-ray tube is stopped. It's safe.

Further, as described above, when both the shield cover 9 and the shutter 6 are opened, the interlock circuit 33 remains open even if the cover switch 12 is turned on. It's safe.

Furthermore, even if a rod-shaped ballpoint pen or the like is inserted from the hook hole 31 and the stopper 27 is intentionally pushed down and the lock switch 30 is closed when the shield cover 9 is open, at that time, The lock plate 16 is locked at the lock position L by a ballpoint pen or the like, and the shutter 6 remains closed, which is safe.

As described above, by adding the electrical interlock function by the interlock circuit 33 to the interlock function by the mechanism with sufficient safety measures, mutual safety is ensured. We were able to take measures.

The cover switch 12 may be omitted when the interlock circuit is simply configured. That is, the lock switch 30 and the shutter switch 26 can be connected in parallel to form an interlock circuit.

[0031]

[Effect of the device]

 As described above, according to the first invention, when the shield cover is opened for exchanging the sample, the lock plate may be moved to the unlock position by the return lever to disengage the hook, At that time, since the shutter integrated with the lock plate is closed, leakage of X-rays can be prevented. When the shield cover is opened, the shutter does not open unless the stopper that holds the lock plate in the unlock position is pushed down.However, like the lock plate, the stopper does not open inside the device body. It is safe because the stopper will not be pushed down and the shutter will not open due to carelessness.

In addition, in the second invention, since the interlock circuit is provided in addition to the mechanism configuration of the first invention, even if the mechanism is not adjusted properly, the shutter may open while the shield cover is open. Even if there is, the interlock circuit opens at that time, so the X-ray source is not energized and safety is ensured.

Further, in the third invention, when both the shield cover and the shutter are opened, or when only the shield cover is opened, the cover switch is turned on intentionally or inadvertently. Even if something happens, the interlock circuit is not closed, and safety is still ensured.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of an interlock mechanism of an X-ray analyzer of the present invention with a shield cover opened.

FIG. 2 is an overall configuration diagram with the shield cover closed.

FIG. 3 is a diagram of the same interlock circuit.

FIG. 4 is a schematic diagram for explaining the principle of a general X-ray analyzer.

FIG. 5 is a perspective view of a conventional X-ray analysis apparatus with a shield cover opened.

[Explanation of symbols]

5 ... Detector, 6 ... Shutter, 7 ... Sample stand, 8 ... Device body, 9 ... Shield cover, 10 ... Hook, 12 ... Cover switch, 16 ... Lock plate, 26 ... Shutter switch,
27 ... Stopper, 30 ... Lock switch, 33 ... Interlock circuit, L ... Lock position, U ... Unlock position.

Claims (3)

[Scope of utility model registration request] 1. A shield cover having an X-ray blocking function, which is provided so as to be openable and closable with respect to a main body of an X-ray analysis apparatus, a hook attached to an open / close end side of the shield cover, and the shield cover is closed. And a return lever provided inside the main body that is slidable between a locked position that engages with the hook and an unlocked position that releases the engagement and is biased in a direction that engages with the hook. And a lock plate attached to the lock plate, and irradiates the sample with the X-ray on the sample table provided on the detection unit having the built-in X-ray source at the lock position where the lock plate is engaged with the hook. In order to open its detector,
An engagement between the shutter having an X-ray blocking function that closes the detector at the unlock position where the lock plate is disengaged from the hook and the lock plate with the hook when the shield cover is open. It is provided inside the main body so as to be engaged with the unlock position where it is released, and when the shield cover is closed, it is pushed down by the hook to release the engagement with the lock plate, and the lock plate is engaged with the hook. An interlock mechanism for an X-ray analysis device, which comprises a stopper. 2. A shield cover having an X-ray blocking function, which is provided so as to be openable and closable with respect to the main body of the X-ray analysis apparatus, a hook attached to the open / close end side of the shield cover, and the shield cover is closed. And a return lever provided inside the main body that is slidable between a locked position that engages with the hook and an unlocked position that releases the engagement and is biased in a direction that engages with the hook. And a lock plate attached to the lock plate, and irradiates the sample with the X-ray on the sample table provided on the detection unit having the built-in X-ray source at the lock position where the lock plate is engaged with the hook. In order to open its detector,
A shutter having an X-ray blocking function that closes the detector at an unlocked position where the lock plate is disengaged from the hook, and a shutter that is provided corresponding to the lock plate and detects opening and closing of the shutter. When the switch and the shield cover are opened, the lock plate is hooked at an unlock position where the engagement with the hook is released, and when the shield cover is closed, the lock plate is pushed down by the hook to lock the lock plate. A stopper provided inside the main body in order to unlock the lock plate and engage the lock plate with the hook,
An interlock circuit having a lock switch provided corresponding to the stopper for detecting engagement / disengagement of the lock plate with respect to the hook, and an interlock circuit in which the lock switch and the shutter switch are connected in parallel is provided with an input power source and an X-ray high voltage. An interlock mechanism for an X-ray analysis apparatus, which is interposed between a power source or an apparatus power source. 3. A cover switch for detecting opening / closing of the shield cover is provided, and an interlock circuit interposed between the input power supply and an X-ray high-voltage power supply or a device power supply includes the cover switch and the lock switch. X is connected in series and is connected in parallel with the shutter switch.
Interlock mechanism of line analyzer.