JP6276141B2 - Radiation analyzer - Google Patents

Description

  The present invention relates to a radiation analyzer.

  Conventionally, in an X-ray analyzer, when opening a sample chamber, an operator first presses an open button of the sample chamber to operate an actuator of an X-ray shutter control mechanism to close the X-ray shutter. Then, the sensor detects that the X-ray shutter is closed, the sample chamber in the sample chamber opening / closing gearbox is unlocked electrically, and the sample chamber is opened by the motor.

  For example, in the X-ray analysis apparatus disclosed in Patent Document 1, when a lever attached to a hooking member is moved to unlock a shield cover, a shutter that detects the operation of the lever with a limit switch and shields X-rays. Is closed.

Japanese Utility Model Publication No. 6-35955

  In the X-ray analyzer of Patent Document 1 described above, the interlock between the X-ray shutter and the sample chamber locking mechanism is electrically operated. Therefore, in the X-ray analysis apparatus of Patent Document 1, for example, when the electrical system of the apparatus runs away or when mechanical damage occurs in a portion where sensing cannot be performed, X-rays are erroneously emitted to the outside. There is a fear.

  The present invention has been made in view of the above-described problems, and one of the objects according to some aspects of the present invention is to provide a radiation analyzer capable of improving safety. It is in.

(1) A radiation analyzer according to the present invention comprises:
A radiation source generating primary radiation; and
A sample chamber in which the sample is placed;
A detector for detecting secondary radiation generated from the sample in response to irradiation of the primary radiation;
A sample chamber lid that can be freely opened and closed;
A first moving member that is movable between a first position and a second position and moves from the first position to the second position when the sample chamber lid is closed;
A pushing portion for moving the first moving member from the second position to the first position;
The claw receiving portion that is attached to the first moving member, engages with a claw receiving portion of the sample chamber lid when the first moving member moves to the second position, and moves to the first position when the first moving member moves to the second position. A claw part to be disengaged from,
A radiation shutter disposed between the radiation source and the sample chamber;
A shutter drive unit that moves the radiation shutter to open and close the radiation shutter; and
A second moving member that moves in conjunction with the radiation shutter;
A restricting member for restricting movement of the first moving member and the second moving member according to a relative position of the first moving member and the second moving member;
including.

  In such a radiation analyzer, the restricting member restricts the movement of the first moving member and the second moving member by the relative positions of the first moving member and the second moving member. In this way, since the interlock is configured with a mechanical mechanism (mechanical interlock), even if the electric system runs away, the radiation generated by the radiation source can be prevented from being released to the outside. it can. Therefore, in such a radiation analyzer, safety can be improved as compared with, for example, an electrical interlock mechanism.

(2) In the radiation analyzer according to the present invention,
The restriction member is provided with a hole into which the first moving member is inserted,
The hole includes a wide portion having a first width and a narrow portion having a second width smaller than the first width,
The first moving member has a first portion having a diameter smaller than the second width, and a second portion having a diameter smaller than the first width and larger than the second width. ,
The first portion is located in the hole when the first moving member is moved to the second position;
The second portion may be positioned in the hole when the first moving member moves to the first position.

  In such a radiation analyzer, as will be described later, the radiation shutter cannot be opened in a state where the engagement between the claw portion and the claw receiving portion is released, so the sample chamber lid is opened and the sample chamber is opened. In this state, the radiation generated by the radiation source can be prevented from being released to the outside. Furthermore, when the radiation shutter is open, the engagement between the nail portion and the nail receiving portion cannot be released. Therefore, during irradiation with radiation, the engagement between the nail portion and the nail receiving portion is released and the sample chamber lid is opened. Can be prevented from opening.

(3) A radiation analysis apparatus according to the present invention comprises:
A radiation source generating primary radiation; and
A sample chamber in which the sample is placed;
A secondary detector for detecting radiation generated from the sample in response to irradiation of the primary radiation;
A sample chamber lid that can be freely opened and closed;
A first moving member that is movable between a first position and a second position and moves from the first position to the second position when the sample chamber lid is closed;
A pushing portion for moving the first moving member from the second position to the first position;
The claw receiving portion that is attached to the first moving member, engages with a claw receiving portion of the sample chamber lid when the first moving member moves to the second position, and moves to the first position when the first moving member moves to the second position. A claw part to be disengaged from,
A radiation shutter disposed between the radiation source and the sample chamber;
A shutter drive unit that moves the radiation shutter to open and close the radiation shutter; and
A second moving member that moves in conjunction with the radiation shutter;
Including
The first moving member is provided with a restricting portion that restricts movement of the first moving member and the second moving member according to a relative position between the first moving member and the second moving member.

In such a radiation analyzer, the restricting portion provided on the first moving member restricts the movement of the first moving member and the second moving member by the relative positions of the first moving member and the second moving member. In this way, since the interlock is configured with a mechanical mechanism (mechanical interlock), even if the electric system runs away, the radiation generated by the radiation source can be prevented from being released to the outside. it can. Therefore, in such a radiation analyzer, safety can be improved as compared with, for example, an electrical interlock mechanism.

(4) In the radiation analyzer according to the present invention,
The restricting portion is a hole provided in the first moving member;
The hole includes a wide portion having a first width and a narrow portion having a second width smaller than the first width,
The second moving member has a first portion having a diameter smaller than the second width, and a second portion having a diameter smaller than the first width and larger than the second width. ,
The second moving member is positioned at the narrow portion when the first moving member is moved to the first position, and is positioned at the wide portion when the first moving member is moved to the second position. May be.

  In such a radiation analyzer, as will be described later, the radiation shutter cannot be opened in a state where the engagement between the claw portion and the claw receiving portion is released, so the sample chamber lid is opened and the sample chamber is opened. In this state, the radiation generated by the radiation source can be prevented from being released to the outside. Furthermore, when the radiation shutter is open, the engagement between the nail portion and the nail receiving portion cannot be released. Therefore, during irradiation with radiation, the engagement between the nail portion and the nail receiving portion is released and the sample chamber lid is opened. Can be prevented from opening.

The figure which shows typically the structure of the radiation analyzer which concerns on 1st Embodiment. The perspective view which shows typically the radiation analyzer which concerns on 1st Embodiment. The perspective view which shows typically the lock mechanism and shutter opening / closing mechanism of the radiation analyzer which concern on 1st Embodiment. The perspective view which shows typically the lock mechanism and shutter opening / closing mechanism of the radiation analyzer which concern on 1st Embodiment. The perspective view which shows typically the locking mechanism of the radiation analyzer which concerns on 1st Embodiment. The perspective view which shows typically the locking mechanism of the radiation analyzer which concerns on 1st Embodiment. The perspective view which shows typically the stopper of the radiation analyzer which concerns on 1st Embodiment. The perspective view which shows typically the shutter opening / closing mechanism of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the keyplate of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the keyplate of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the keyplate of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the radiation analyzer which concerns on 1st Embodiment. The figure for demonstrating operation | movement of the radiation analyzer which concerns on 1st Embodiment. The perspective view which shows typically the rod which comprises the locking mechanism of the radiation analyzer which concerns on 2nd Embodiment. The perspective view which shows typically the shaft which comprises the shutter opening / closing mechanism of the radiation analyzer which concerns on 2nd Embodiment. The figure for demonstrating operation | movement of the rod and shaft of the radiation analyzer which concerns on 2nd Embodiment. The figure for demonstrating operation | movement of the rod and shaft of the radiation analyzer which concerns on 2nd Embodiment. The figure for demonstrating operation | movement of the rod and shaft of the radiation analyzer which concerns on 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, not all of the configurations described below are essential constituent requirements of the present invention.

1. 1. First embodiment 1.1. Configuration of Radiation Analyzer First, the configuration of the radiation analyzer according to the first embodiment will be described with reference to the drawings. FIG. 1 is a diagram schematically showing the configuration of the radiation analysis apparatus according to the first embodiment.

  As shown in FIG. 1, the radiation analyzer 100 includes a radiation source 10, a sample chamber 20, a detector 30, a sample chamber lid 40, a lock mechanism 50, a shutter (radiation shutter) 60, and a collimator 62. And a shutter opening / closing mechanism 70.

  The radiation analysis apparatus 100 irradiates the sample S to be analyzed with primary X-rays (primary radiation) generated from the radiation source 10, and the characteristics secondary excited by the sample S in response to the irradiation with the primary X-rays. By detecting X-rays (secondary X-rays) with the detector 30, qualitative analysis and quantitative analysis of sample constituent elements are performed. The radiation analyzer 100 is, for example, a fluorescent X-ray analyzer.

  The radiation source 10 is, for example, an X-ray tube. The primary X-rays generated by the radiation source 10 pass through the collimator 62 and are irradiated to the analysis target position of the sample S.

  The sample chamber 20 accommodates the sample S. The sample S is supported by the sample support plate 22 in the sample chamber 20. An opening is formed in the sample support plate 22, and primary X-rays reach the sample S through the opening. Characteristic X-rays (secondary X-rays) are generated from the analysis target position of the sample S irradiated with the primary X-rays.

  The detector 30 detects characteristic X-rays generated in the sample S. The detector 30 is, for example, a semiconductor detector.

  The sample chamber lid 40 is a lid for sealing the sample chamber 20. The sample chamber lid 40 also functions as a shield for preventing primary X-rays generated from the radiation source 10 from leaking outside. The sample chamber lid 40 is provided so as to be freely opened and closed.

  The lock mechanism 50 is a mechanism for controlling opening and closing of the sample chamber lid 40. Details of the lock mechanism 50 will be described later.

  The shutter 60 is disposed between the radiation source 10 and the sample chamber 20. By closing the shutter 60, it is possible to prevent primary X-rays generated from the radiation source 10 from leaking to the outside.

  The collimator 62 is a member for narrowing down primary X-rays generated by the radiation source 10. Thereby, in the sample S, the irradiation area of the primary X-ray can be reduced.

The shutter opening / closing mechanism 70 is a mechanism that controls the shutter 60 and the collimator 62. Details of the shutter opening / closing mechanism 70 will be described later.

  FIG. 2 is a perspective view schematically showing the radiation analysis apparatus 100.

  As shown in FIG. 2, the radiation analysis apparatus 100 includes an apparatus frame 2. The lock mechanism 50 and the shutter opening / closing mechanism 70 are held by the apparatus frame 2.

  The sample chamber lid 40 includes a push block 42 and a push block 44 (an example of a claw receiving portion). The push blocks 42 and 44 are provided on the inner surface (surface on the apparatus main body side) of the sample chamber lid 40 and protrude from the surface. The push block 44 is provided with a groove for receiving a claw portion 51 of a lock mechanism 50 described later.

  3 and 4 are perspective views schematically showing the lock mechanism 50 and the shutter opening / closing mechanism 70. FIG.

  As shown in FIGS. 3 and 4, the radiation analysis apparatus 100 includes a key plate (an example of a regulating member) 80. The rod 52 (an example of the first moving member) constituting the lock mechanism 50 is disposed so as to pass through the hole 82 of the key plate 80. A key plate 80 is fixed to an end of a shaft (an example of a second moving member) 72 of the shutter opening / closing mechanism 70. The lock mechanism 50 and the shutter opening / closing mechanism 70 are connected via a key plate 80.

  5 and 6 are perspective views schematically showing the lock mechanism 50. FIG. 5 and 6 show arrows indicating the A direction and the B direction opposite to the A direction. The A direction is a direction from the rear of the apparatus toward the front of the apparatus, and the B direction is a direction from the front of the apparatus toward the rear of the apparatus.

  The lock mechanism 50 is a mechanism for locking the sample chamber lid 40 when the sample chamber lid 40 (see FIG. 2) is closed. As shown in FIGS. 5 and 6, the lock mechanism 50 includes a claw portion 51, a rod 52, a stopper 53, a stopper spring 54, a rod spring 55, and a sample chamber OPEN button 56 (an example of a pushing portion). And an OPEN button rod 57, a rod receiving portion 58, and sensors 59a and 59b.

  The claw portion 51 is attached to the rod 52. The claw portion 51 is a component that engages with the push block 44 (see FIG. 2) of the sample chamber lid 40 and locks the sample chamber lid 40 so as not to open. The claw portion 51 is attached (fixed) to the rod 52 and interlocks with the movement of the rod 52.

  The rod 52 is disposed so as to pass through the hole 82 of the key plate 80. The rod 52 can move linearly in the A direction or the B direction. The rod 52 moves along the central axis of the rod 52. The rod 52 linearly moves between a predetermined position (first position) at the rear of the apparatus and a predetermined position (second position) at the front of the apparatus. Specifically, when the sample chamber lid 40 is closed, the rod 52 is moved from the rear of the device to the front of the device (direction A) by the rod spring 55 and is positioned at the second position in front of the device. Further, when the sample chamber OPEN button 56 is pressed, the rod 52 moves from the front of the apparatus to the rear of the apparatus (direction B) and is positioned at the first position at the rear of the apparatus.

The stoppers 53 are installed at two locations, the front of the apparatus and the rear of the apparatus. The movement of the rod 52 can be restricted by the stopper 53. FIG. 7 is a perspective view schematically showing the stopper 53 at the rear of the apparatus. In the example shown in FIG. 7, the stopper 53 is urged by a stopper spring 54 and is positioned above the apparatus. At this time, the bearing 510 attached to the rod 52 is caught by the stopper 53, and the movement of the rod 52 in the A direction is restricted. The stopper 53 is positioned below the apparatus by being pushed by the push block 42 (see FIG. 2) of the sample chamber lid 40. At this time, since the bearing 510 can pass through the groove 530 provided around the stopper 53, the movement restriction of the rod 52 in the A direction is released.

  The rod spring 55 has one end fixed to the rod 52 and the other end fixed to the device frame 2. The rod spring 55 is a member for moving the rod 52 forward of the apparatus (direction A).

  The sample chamber OPEN button 56 is a button for releasing the lock of the sample chamber lid 40. When the operator pushes the sample chamber OPEN button 56, the rod 52 is pushed through the OPEN button rod 57 and the rod receiving portion 58 to move to the rear of the apparatus. Specifically, when the sample chamber OPEN button 56 is pressed, the OPEN button rod 57 is pressed to move backward (B direction) of the apparatus and press the rod receiving portion 58. Since the rod receiving portion 58 is fixed to the rod 52, the rod 52 is moved rearward (B direction) when the rod receiving portion 58 is pushed and moved rearward (B direction).

  The sensor 59a is a sensor for detecting the position of the key plate 80. The sensor 59b is a sensor for detecting the position of the rod 52.

  FIG. 8 is a perspective view schematically showing the configuration of the shutter opening / closing mechanism 70. FIG. 8 illustrates an arrow indicating a C direction and a D direction opposite to the C direction. The C and D directions are perpendicular to the A and B directions.

  As shown in FIG. 8, the shutter opening / closing mechanism 70 includes a shaft 72, a motor 73 (an example of a shutter drive unit), a belt 74, a collimator (shutter) plate 75, a sensor 76, and a spring 77. Including.

  The shaft 72 has one end fixed to the collimator plate 75 and the other end fixed to the key plate 80. The shaft 72 connects the collimator plate 75 and the key plate 80. The shaft 72 is fixed to the collimator plate 75 and interlocks with the operation of the collimator plate 75, that is, the operation of the shutter 60.

  The motor 73 is a member for selecting the shutter 60 and the collimator 62 by moving the collimator plate 75 to which the shutter 60 and the collimator 62 are attached. As the motor 73 operates, the collimator plate 75 moves linearly in the C direction or the D direction.

  The belt 74 is a member for transmitting the power of the motor 73 to the collimator plate 75. The belt 74 has one end fixed to the shaft of the motor 73 and the other end fixed to the collimator plate 75.

  A shutter 60 and a plurality of (three in the illustrated example) collimators 62 are attached to the collimator plate 75. Since each collimator 62 has openings having different sizes, the irradiation area of the primary X-ray can be changed by changing the collimator 62. The number of collimators 62 attached to the collimator plate 75 is not particularly limited.

The sensor 76 is a sensor for detecting the position of the collimator plate 75 (the position of the shutter 60 and the position of the collimator 62).

  The spring 77 has one end fixed to the collimator plate 75 and the other end fixed to the device frame 2. The spring 77 is a member for returning the collimator plate 75 to the C direction.

  9 to 11 are diagrams for explaining the operation of the key plate 80.

  As shown in FIGS. 9 to 11, the key plate 80 has a hole 82. The hole portion 82 of the key plate 80 includes a wide portion 82a having a first width W1 and a narrow portion 82b having a second width W2 smaller than the first width W1. The widths W1 and W2 of the hole portion 82 are the sizes of the hole portion 82 in the directions orthogonal to the A and B directions and the C and D directions, as shown in FIG. The wide portion 82a and the narrow portion 82b are arranged side by side in the moving direction of the shaft 72, that is, in the C and D directions. The wide portion 82a is located on the D direction side, and the narrow portion 82b is located on the C direction side. In the illustrated example, the size of the narrow portion 82b in the C and D directions is larger than the size of the wide portion 82a in the C and D directions. The shape of the opening of the hole portion 82 of the key plate 80 is a key hole shape in the illustrated example.

  The rod 52 has a portion having a small diameter (first portion) 52a and a portion having a large diameter (second portion) 52b. The first portion 52 a is a portion formed by providing a groove 520 around the rod 52. The diameter of the first portion 52a is smaller than the width W2 of the narrow portion 82b. The diameter of the second portion 52b is larger than the width W2 of the narrow portion 82b and smaller than the width W1 of the wide portion 82a.

  The key plate 80 regulates the movement of the rod 52 and the shaft 72 according to the relative position between the rod 52 and the shaft 72. Specifically, in the key plate 80, the position of the groove portion 520 of the rod 52 with respect to the hole portion 82 of the key plate 80 changes according to the position of the rod 52 in the A and B directions. Further, the position of the rod 52 (the position in the C and D directions) with respect to the hole portion 82 of the key plate 80 changes according to the position of the shaft 72 in the C and D directions. The key plate 80 limits the operation of the shaft 72 and the operation of the rod 52 by utilizing the positional relationship between the hole 82 of the key plate 80 and the groove 520 of the rod 52.

  Hereinafter, the positional relationship between the hole portion 82 of the key plate 80 and the groove portion 520 of the rod 52 and the relationship of the operation restriction of the shaft 72 and the rod 52 by the key plate 80 will be described.

  FIG. 9 illustrates a state in which the position of the hole portion 82 of the key plate 80 and the position of the groove portion 520 of the rod 52 do not match and the rod 52 is positioned in the wide portion 82a. That is, FIG. 9 illustrates a state in which the second portion 52b of the rod 52 is positioned in the wide portion 82a.

  In the state shown in FIG. 9, the rod 52 is located in the wide portion 82a, and therefore can move in the A and B directions. On the other hand, the movement of the shaft 72 in the C and D directions is restricted. This is because the second portion 52b of the rod 52 is located in the hole 82, and the rod 52 cannot pass through the narrow portion 82b. Therefore, the movement of the key plate 80 in the C and D directions is restricted by the rod 52, and the movement of the shaft 72 in the C and D directions is also restricted.

  FIG. 10 illustrates a state in which the position of the hole portion 82 of the key plate 80 and the position of the groove portion 520 of the rod 52 coincide with each other and the rod 52 is positioned in the wide portion 82a. That is, FIG. 10 illustrates a state in which the first portion 52a of the rod 52 is located in the wide portion 82a.

  In the state shown in FIG. 10, since the rod 52 is located in the wide part 82a, it can move in the A and B directions. Further, the shaft 72 is movable in the C and D directions. This is because the first portion 52a of the rod 52 is located in the hole portion 82, and the rod 52 can pass through the narrow portion 82b. As a result, the key plate 80 can move in the C and D directions, and the shaft 72 can move in the C and D directions.

  FIG. 11 illustrates a state in which the position of the hole portion 82 of the key plate 80 and the position of the groove portion 520 of the rod 52 coincide with each other and the rod 52 is positioned in the narrow portion 82b. That is, FIG. 11 illustrates a state where the first portion 52a of the rod 52 is located in the narrow portion 82b.

  In the case of the state shown in FIG. 11, the rod 52 is positioned in the narrow portion 82b, and thus movement in the A and B directions is restricted. This is because the step between the first portion 52a and the second portion 52b of the rod 52 comes into contact with the key plate 80 when the rod 52 tries to move in the A and B directions. In contrast, the shaft 72 is movable in the C and D directions. This is because the first portion 52a of the rod 52 is located in the hole portion 82, and the rod 52 can pass through the narrow portion 82b.

1.2. Operation of Radiation Analyzer Next, the operation of the radiation analyzer 100 will be described with reference to the drawings. 12-17 is a figure for demonstrating operation | movement of the radiation analyzer 100. FIG.

(1) Operation until the Sample Chamber Lid is Closed and the Shutter Open / Close Mechanism is Operable First, in the radiation analyzer 100, the operation until the sample chamber lid 40 is closed and the shutter open / close mechanism 70 is operable. explain. That is, an operation until the radiation analyzer 100 is ready to start measurement will be described.

  In the initial state, it is assumed that the sample chamber lid 40 is open and the sample chamber 20 is open (see FIG. 2). In this case, the rod 52 is located behind the device (first position), and its movement is restricted by the stopper 53. Specifically, as shown in FIG. 12, the bearing 510 attached to the rod 52 is caught by the stopper 53 in front of the apparatus, and the rod 52 cannot move in the apparatus front (direction A). At the same time, the stopper 53 at the rear of the apparatus similarly restricts the movement of the rod 52 in the front of the apparatus (direction A) (see FIG. 7).

  At this time, the positional relationship between the hole portion 82 of the key plate 80 and the groove portion 520 of the rod 52 is as shown in FIG. 9, and the position of the hole portion 82 of the key plate 80 and the position of the groove portion 520 of the rod 52 are Does not match. Therefore, since the movement of the shaft 72 is restricted, the shutter opening / closing mechanism 70 cannot operate.

  As a result, when the sample chamber lid 40 is opened and the sample chamber 20 is opened, the shutter opening / closing mechanism 70 cannot operate and the shutter 60 is kept closed. Therefore, primary X-rays generated by the radiation source 10 (see FIG. 1) are not irradiated to the outside.

When the operator closes the sample chamber lid 40 from the state shown in FIG. 12, the two stoppers 53 (see FIG. 5) of the lock mechanism 50 are moved downward by the push blocks 42 and 44 (see FIG. 2) of the sample chamber lid 40. Is pushed into. As shown in FIG. 13, when the stopper 53 is pushed in, the height of the groove 530 of the stopper 53 becomes the same as the height of the bearing 510 attached to the rod 52, and the bearing 510 is detached from the stopper 53. As a result, there is no restriction on the operation of the rod 52, and the rod 52 is pulled (moved) by the rod spring 55 by being pulled forward (direction A).

  As a result, as shown in FIG. 14, the claw portion 51 attached to the rod 52 moves in front of the apparatus (direction A) in conjunction with the movement of the rod 52. Thereby, the claw portion 51 engages with the push block 44 (the claw portion 51 is inserted into the groove of the push block 44), and locks the sample chamber lid 40. As a result, the state in which the sample chamber lid 40 is closed can be maintained. At the same time, since the claw portion 51 is engaged with the push block 44, the stopper 53 is not lifted upward and is maintained in a state of being positioned below.

  Further, as the rod 52 moves forward (direction A), the positional relationship between the hole portion 82 of the key plate 80 and the groove portion 520 of the rod 52 becomes the state shown in FIG. 10, and the position of the groove portion 520 of the rod 52 is changed. , Coincides with (overlaps) the position of the hole 82 of the key plate 80. Thereby, the operation restriction of the key plate 80 is released, the shaft 72 can be moved in the C and D directions, and the shutter opening / closing mechanism 70 can be operated.

  With the above operation, the radiation analyzer 100 can be brought into a state in which the sample chamber lid 40 is closed and the shutter opening / closing mechanism 70 can be operated.

(2) Measurement When a measurement start signal is sent from the operation unit (PC or the like, not shown) of the radiation analyzer 100, the shutter opening / closing mechanism 70 (see FIG. 8) moves the collimator plate 75 by the motor 73. Thus, the primary X-ray passes through the collimator 62 from the state where the shutter 60 is closed. At this time, as shown in FIGS. 11 and 15, since the rod 52 is positioned in the narrow portion 82b, the movement of the rod 52 is restricted and the sample chamber lid 40 is locked (the claw portion 51 and the push block). 44) cannot be released. That is, the sample chamber lid 40 cannot be opened to open the sample chamber 20.

  While the primary X-ray is irradiated from the radiation source 10, the key plate 80 and the rod 52 are detected by the sensors 59a and 59b (see FIG. 6) of the lock mechanism 50 and the sensor 76 (see FIG. 8) of the shutter opening / closing mechanism 70. If the sensor 59a, 59b, 76 detects an abnormality, the shutter opening / closing mechanism 70 is operated to close the shutter 60 and block the primary X-rays.

(3) Operation until the shutter is closed and the sample chamber lid is opened Next, in the radiation analyzer 100, an operation until the shutter 60 is closed and the sample chamber lid 40 is opened will be described.

  When the measurement is not completed or interrupted, or when the power is turned off, the collimator plate 75 is moved by the force of the spring 77 (see FIG. 8) to close the shutter 60. Further, the movement of the collimator plate 75 causes the shaft 72 to move and the key plate 80 to move. Thereby, the positional relationship between the hole 82 of the key plate 80 and the groove 520 of the rod 52 is in the state shown in FIG. Therefore, the movement restriction of the rod 52 is released, and the sample chamber OPEN button 56 can be pressed.

As described above, the rod 52 can move in the A and B directions as long as the shutter 60 is closed and the rod 52 is positioned in the wide portion 82a (the state shown in FIG. 9 or FIG. 10). is there. That is, in a state where the shutter 60 is closed, the rod 52 can be moved by pressing the sample chamber OPEN button 56. On the other hand, the movement of the rod 52 is restricted when the shutter 60 is opened and the rod 52 is positioned at the narrow portion 82b (the state shown in FIG. 11). That is, when the shutter 60 is open, the rod 52 cannot be moved by pressing the sample chamber OPEN button 56. Therefore, it is possible to prevent the sample chamber lid 40 from being opened while the shutter 60 is open.

  As shown in FIG. 16, when the operator pushes the sample chamber OPEN button 56, the rod 52 is pushed and moved to the rear of the apparatus (direction B). As the rod 52 moves rearward (B direction), the positional relationship between the hole portion 82 of the key plate 80 and the groove portion 520 of the rod 52 is in the state shown in FIG. 9, that is, the hole portion 82 of the key plate 80. The position and the position of the groove 520 of the rod 52 do not match. Thereby, the movement of the shaft 72 is restricted, the operation of the shutter opening / closing mechanism 70 is restricted, and the state where the shutter 60 is closed is maintained. At the same time, the rod 52 moves rearward (direction B), so that the claw portion 51 is disengaged from the push block 44 (the engagement between the claw portion 51 and the push block 44 is released), and the lock of the sample chamber lid 40 is released. Is done.

  As shown in FIG. 17, the push block 44 is released from the restriction by the claw portion 51 and is pushed by the stopper spring 54 to lift the sample chamber lid 40. Thereby, the sample chamber 20 is opened. At the same time, when the stopper 53 is raised, the bearing 510 of the rod 52 is caught by the stopper 53, and the movement of the rod 52 in the front (A direction) of the device is restricted.

  At this time, the rod 52 is in a state where the position of the hole portion 82 and the position of the groove portion 520 shown in FIG. 9 do not coincide with each other, and the operation is restricted by the stopper 53 in this state. Further, in the state shown in FIG. 9, the movement of the shaft 72 is also restricted. As a result, when the sample chamber lid 40 is open, the shutter opening / closing mechanism 70 cannot be operated. Thereby, it is possible to prevent the shutter 60 from being opened when the sample chamber lid 40 is open.

  The radiation analysis apparatus 100 has the following features, for example.

  In the radiation analyzer 100, the key plate 80 regulates the movement of the rod 52 and the shaft 72 by the relative positions of the rod 52 constituting the lock mechanism 50 and the shaft 72 constituting the shutter opening / closing mechanism 70. Thus, in the radiation analyzer 100, since the interlock is configured by a mechanical mechanism (mechanical interlock), even when the electric system runs away, the primary X-rays generated by the radiation source 10 are externally exposed. It can be prevented from being released. Therefore, in the radiation analyzer 100, the safety can be improved as compared with, for example, an electrical interlock mechanism.

  In the radiation analyzer 100, the key plate 80 is provided with a hole portion 82 into which the rod 52 is inserted. The hole portion 82 has a wide portion 82a having a first width W1 and smaller than the first width W1. The rod 52 includes a first portion 52a having a smaller diameter than the second width W2, and a second portion having a smaller diameter than the first width W1. A second portion 52b having a diameter larger than the width W2, and the first portion 52a is located in the hole portion 82 when the rod 52 is moved to the second position (front of the apparatus), and the second portion 52b is When the rod 52 moves to the first position (the rear of the apparatus), the rod 52 is located in the hole portion 82. Accordingly, since the shutter 60 cannot be opened in the state where the lock mechanism 50 is released and the sample chamber lid 40 is open, primary X-rays generated in the radiation source 10 in a state where the sample chamber 20 is released are generated. Release to the outside can be prevented. Further, since the lock of the sample chamber lid 40 cannot be released in the state where the shutter 60 is open, it is possible to prevent the sample chamber lid 40 from being opened during the irradiation with the primary X-rays.

2. Second Embodiment Next, a radiation analyzer according to a second embodiment will be described with reference to the drawings. Hereinafter, differences from the example of the radiation analysis apparatus 100 according to the first embodiment described above will be described, and description of similar points will be omitted.

  FIG. 18 is a perspective view schematically showing a rod 52 constituting the lock mechanism 50 of the radiation analyzer according to the second embodiment. FIG. 19 is a perspective view schematically showing a shaft 72 constituting the shutter opening / closing mechanism 70 of the radiation analysis apparatus according to the second embodiment.

  In the radiation analysis apparatus 100 according to the first embodiment described above, the key plate 80 regulates the movement of the rod 52 and the shaft 72 by the relative positions of the rod 52 constituting the lock mechanism 50 and the shaft 72 constituting the shutter opening / closing mechanism 70. Was.

  On the other hand, in the radiation analyzer according to the second embodiment, as shown in FIGS. 18 and 19, the rod 52 is provided with a hole 522 (an example of a restricting portion), so that the rod 52 and the shaft 72 are relatively aligned. The movement of the rod 52 and the shaft 72 is regulated by the position.

  As shown in FIG. 18, the rod 52 has a hole 522. The hole portion 522 of the rod 52 includes a wide portion 522a having a first width W1 and a narrow portion 522b having a second width W2 smaller than the first width W1. The widths W1 and W2 of the hole 522 are the size of the hole 82 in the direction orthogonal to the A and B directions. The wide portion 522a and the narrow portion 522b are arranged in the moving direction of the rod 52, that is, the A and B directions. The wide portion 522a is located on the B direction side, and the narrow portion 522b is located on the A direction side. The shape of the opening of the hole 522 of the rod 52 is a keyhole shape in the illustrated example.

  As shown in FIG. 19, the shaft 72 has a portion (first portion) 72a having a small diameter and a portion (second portion) 72b having a large diameter. The first part 72 a is a part formed by providing a groove 720 around the shaft 72. The diameter of the first portion 72a is smaller than the width W2 (see FIG. 18) of the narrow portion 522b of the rod 52. The diameter of the second portion 72b is larger than the width W2 of the narrow portion 522b of the rod 52 and smaller than the width W1 of the wide portion 522a. A step is formed at the boundary between the first portion 72 a and the second portion 72 b of the shaft 72.

  20-22 is a figure for demonstrating operation | movement of the rod 52 and the shaft 72. FIG.

  In this embodiment, the movement of the rod 52 and the shaft 72 is regulated by the relative position of the rod 52 and the shaft 72 by inserting the shaft 72 having the portions 72 a and 72 b having different diameters into the hole portion 522 of the rod 52. Yes.

  Hereinafter, the relationship between the positional relationship between the hole 522 of the rod 52 and the shaft 72 and the operation restriction of the rod 52 and the shaft 72 will be described.

  FIG. 20 illustrates a state in which the first portion 72 a of the shaft 72 is located in the narrow portion 522 b of the hole 522. When the shaft 72 and the rod 52 are in the state shown in FIG. 20, the rod 52 can move in the A and B directions. This is because the first portion 72 a of the shaft 72 is located in the hole 522. On the other hand, the movement of the shaft 72 in the C and D directions is restricted. This is because the step at the boundary between the first portion 72 a and the second portion 72 b of the shaft 72 comes into contact with the rod 52 when the shaft 72 tries to move in the A and B directions.

FIG. 21 illustrates a state in which the first portion 72 a of the shaft 72 is located in the wide portion 522 a of the hole 522. When the shaft 72 and the rod 52 are in the state shown in FIG. 21, the first portion 72 a of the shaft 72 is located in the hole 522, so that the rod 52 can move in the A and B directions. The shaft 72 can move in the C and D directions. This is because the diameter of the second portion 72 b of the shaft 72 is smaller than the diameter of the wide portion 522 a of the hole portion 522, and the shaft 72 can pass through the wide portion 522 a of the hole portion 522.

  FIG. 22 illustrates a state in which the second portion 72 b of the shaft 72 is located in the wide portion 522 a of the hole portion 522. When the shaft 72 and the rod 52 are in the state shown in FIG. 22, the movement of the rod 52 in the A and B directions is restricted because the second portion 72 b of the shaft 72 is located in the hole 522. This is because the second portion 72b of the shaft 72 cannot pass through the narrow portion 522b. On the other hand, since the shaft 72 is located in the wide part 522a, it can move in the C and D directions.

  Next, the operation of the radiation analyzer according to the second embodiment will be described.

  In the state where the sample chamber lid 40 is opened and the shutter 60 is closed, the rod 52 and the shaft 72 are in a state where the first portion 72a of the shaft 72 shown in FIG. 20 is located in the narrow portion 522b of the hole 522. Become. Therefore, the movement of the shaft 72 in the C and D directions is restricted. Thereby, the shutter opening / closing mechanism 70 cannot be operated, and the shutter 60 cannot be opened.

  In the state in which the sample chamber lid 40 is closed and locked (the state where the claw portion 51 is engaged with the push block 44, see FIG. 14), the rod 52 and the shaft 72 are the first portion 72a of the shaft 72 shown in FIG. Is located in the wide portion 522a of the hole portion 522. Therefore, the shaft 72 is movable in the C and D directions, and the shutter opening / closing mechanism 70 can be operated. Therefore, the shutter 60 can be opened.

  In the state where the shutter 60 is opened, the rod 52 and the shaft 72 are in a state where the second portion 72b of the shaft 72 shown in FIG. 22 is positioned in the wide portion 522a of the hole portion 522. Therefore, the movement of the rod 52 in the A and B directions is restricted. Thereby, the sample chamber OPEN button 56 cannot be pressed to unlock the sample chamber lid 40.

  Other operations of the radiation analysis apparatus according to the second embodiment are the same as the operations of the radiation analysis apparatus 100 according to the first embodiment described above, and a description thereof is omitted.

  In the radiation analysis apparatus according to the second embodiment, the rod 52 is provided with a hole 522 that restricts the movement of the rod 52 and the shaft 72 according to the relative position of the rod 52 and the shaft 72. As described above, in the radiation analysis apparatus according to the second embodiment, since the interlock is configured by a mechanical mechanism (mechanical interlock), the primary generated in the radiation source 10 even when the electric system runs out of control. X-rays can be prevented from being emitted to the outside. Therefore, in the radiation analyzer according to the second embodiment, for example, safety can be improved as compared with an electrical interlock mechanism.

In the radiation analyzer according to the second embodiment, the hole 522 includes a wide portion 522a having a first width W1 and a narrow portion 522b having a second width W2 smaller than the first width W1. The shaft 72 includes a first portion 72a having a diameter smaller than the second width W2, and a second portion 72b having a diameter smaller than the first width W1 and larger than the second width W2. The shaft 72 is positioned at the wide portion 522a when the rod 52 is moved to the first position (device rear), and the narrow portion 522b when the rod 52 is moved to the second position (device front). Located in. Accordingly, since the shutter 60 cannot be opened in the state where the lock mechanism 50 is released and the sample chamber lid 40 is open, primary X-rays generated in the radiation source 10 in a state where the sample chamber 20 is released are generated. Release to the outside can be prevented. Further, since the lock of the sample chamber lid 40 cannot be released when the shutter 60 is open, the sample chamber lid 40 can be prevented from opening while the sample S is irradiated with the primary X-rays.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation implementation is possible within the range of the summary of this invention.

  For example, in the first embodiment and the second embodiment described above, an example in which the radiation analysis apparatus according to the present invention is a fluorescent X-ray analysis apparatus has been described. However, the radiation analysis apparatus according to the present invention is radiation generated by a radiation source. There is no particular limitation as long as it is an analyzer that irradiates the sample S in the sample chamber with (X-rays, γ-rays, etc.).

  The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. Further, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

2 ... device frame, 10 ... radiation source, 20 ... sample chamber, 22 ... sample support plate, 30 ... detector, 40 ... sample chamber lid, 42, 44 ... push block, 50 ... lock mechanism, 51 ... claw portion, 52 ... Rod, 52a ... First part, 52b ... Second part, 53 ... Stopper, 54 ... Stopper spring, 55 ... Rod spring, 56 ... Sample chamber OPEN button, 57 ... OPEN button rod, 58 ... Rod receiving part, 59a, 59b ... sensor, 60 ... shutter, 62 ... collimator, 70 ... shutter opening / closing mechanism, 72 ... shaft, 72a ... first part, 72b ... second part, 73 ... motor, 74 ... belt, 75 ... collimator plate, 76 ... sensor, 77 ... spring, 80 ... key plate, 82 ... hole, 82a ... wide part, 82b ... narrow part, 100 ... radiation component Device, 510 ... bearing, 520 ... groove portion, 522 ... hole, 522a ... wide portion, 522b ... narrow portion, 530,720 ... groove

Claims (4)

A radiation source generating primary radiation; and
A sample chamber in which the sample is placed;
A detector for detecting secondary radiation generated from the sample in response to irradiation of the primary radiation;
A sample chamber lid that can be freely opened and closed;
A first moving member that is movable between a first position and a second position and moves from the first position to the second position when the sample chamber lid is closed;
A pushing portion for moving the first moving member from the second position to the first position;
The claw receiving portion that is attached to the first moving member, engages with a claw receiving portion of the sample chamber lid when the first moving member moves to the second position, and moves to the first position when the first moving member moves to the second position. A claw part to be disengaged from,
A radiation shutter disposed between the radiation source and the sample chamber;
A shutter drive unit that moves the radiation shutter to open and close the radiation shutter; and
A second moving member that moves in conjunction with the radiation shutter;
A restricting member for restricting movement of the first moving member and the second moving member according to a relative position of the first moving member and the second moving member;
A radiation analyzer. In claim 1,
The restriction member is provided with a hole into which the first moving member is inserted,
The hole includes a wide portion having a first width and a narrow portion having a second width smaller than the first width,
The first moving member has a first portion having a diameter smaller than the second width, and a second portion having a diameter smaller than the first width and larger than the second width. ,
The first portion is located in the hole when the first moving member is moved to the second position;
The second part is a radiation analysis apparatus, wherein the second part is located in the hole when the first moving member is moved to the first position. A radiation source generating primary radiation; and
A sample chamber in which the sample is placed;
A detector for detecting secondary radiation generated from the sample in response to irradiation of the primary radiation;
A sample chamber lid that can be freely opened and closed;
A first moving member that is movable between a first position and a second position and moves from the first position to the second position when the sample chamber lid is closed;
A pushing portion for moving the first moving member from the second position to the first position;
The claw receiving portion that is attached to the first moving member, engages with a claw receiving portion of the sample chamber lid when the first moving member moves to the second position, and moves to the first position when the first moving member moves to the second position. A claw part to be disengaged from,
A radiation shutter disposed between the radiation source and the sample chamber;
A shutter drive unit that moves the radiation shutter to open and close the radiation shutter; and
A second moving member that moves in conjunction with the radiation shutter;
Including
The first moving member is provided with a restriction unit that restricts movement of the first moving member and the second moving member according to a relative position between the first moving member and the second moving member. . In claim 3,
The restricting portion is a hole provided in the first moving member;
The hole includes a wide portion having a first width and a narrow portion having a second width smaller than the first width,
The second moving member has a first portion having a diameter smaller than the second width, and a second portion having a diameter smaller than the first width and larger than the second width. ,
The second moving member is positioned at the narrow portion when the first moving member is moved to the first position, and is positioned at the wide portion when the first moving member is moved to the second position. A radiation analyzer.

Images