JP2002131436A - Storage case for personal dosemeter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage case for personal dosemeter which can make the displaying section of a personal dosemeter visible from the outside and can secure an appropriate housing state when the dosement is kept in the case. SOLUTION: In this storage case 10, the personal dosemeter 16 is positioned and kept on pedestals 24 and 26 and held between the pedestals 24 and 26 and a transparent film 32. When the dosemeter 16 is housed in the case 10 in the appropriate housing state, a magnet 28 approaches a reed switch 21 and, consequently, the power supply to the dosemeter 16 is turned off. Since the upper and lower containers 14 and 12 of the case 10 are made of transparent members, the displaying section 18 of the dosemeter 16 can be observed from the outside through the containers 14 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage case for a personal dosimeter, and more particularly to a storage case in which a power-off magnet is arranged.

[0002]

2. Description of the Related Art In a radiation handling facility such as a nuclear power plant, it is mandatory to carry a personal dosimeter under certain conditions in order to control each worker's exposure. As for the personal dosimeter, a switchless type is widely used in addition to a power switch provided on a case. That is, if the power switch is accidentally turned off during measurement, there is a problem in radiation management. Therefore, the power is automatically turned off in the storage case.

As a storage case for storing such a switchless type personal dosimeter, a storage case in the form of an eyeglass case or a pencil case has been conventionally used, and the power supply is turned off inside the storage case. Is provided. In other words, when the personal dosimeter is inserted into the case in the proper orientation, the magneto-sensitive switch provided in the personal dosimeter responds to the magnetic field lines of the magnet, and the switch operates to automatically turn on the power of the personal dosimeter. It is to cut.

[0004]

However, the conventional storage case is colored, for example, in black, and it is necessary to check the operation stop state of the personal dosimeter or the storage state itself in the storage state. Could not. In addition, although a cushion member for holding the personal dosimeter was provided inside the storage case, it was pointed out that the personal dosimeter could rattle inside the case due to various factors such as positioning errors, assembly errors, and shape changes. It had been. Furthermore, it is necessary to always ensure that the personal dosimeter is housed in the storage case in a properly housed state in order to reliably turn off the power.

[0005] The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make it possible to observe the state of a personal dosimeter in a housed state.

Another object of the present invention is to ensure that the personal dosimeter can always be held.

[0007] It is another object of the present invention to eliminate accommodation in an orientation other than the normal accommodation state.

[0008]

In order to achieve the above object, the present invention relates to a storage case comprising a lower container and an upper container which opens and closes with respect to the lower container. In the lower container, a magnet is provided at a position close to a power-off magnetic-sensitive switch of the personal dosimeter in a normal accommodation state in which the personal dosimeter is accommodated in an appropriate direction inside the case, All or part of the upper container has transparency for observing the display unit of the personal dosimeter in the normal storage state of the personal dosimeter, and in the normal storage state of the personal dosimeter, the power-off A magnetic switch is operated to turn off the power of the personal dosimeter,
In this state, the display unit of the personal dosimeter can be observed through the upper container through the upper container.

[0009] According to the above configuration, when the personal dosimeter is stored in the storage case in a regular storage state, the display unit can be seen through the upper container, so that the power supply of the personal dosimeter can be surely provided. It can be confirmed that it is in the off state, and the accommodation state itself can be confirmed.

Preferably, the whole of the lower container and the upper container is formed of a transparent member. Although a transparent window may be formed in a part of the upper container, manufacturing costs can be reduced if the entire case is made of a transparent member, and there is an advantage that the housing state of the personal dosimeter can be seen through from various angles. .

Preferably, a pedestal for positioning and holding the personal dosimeter is provided inside the lower container while allowing a clip protruding from the lower surface of the personal dosimeter to be accommodated therein, and the upper container is provided in the upper container. An elastic transparent film that covers the opening surface is provided, and the personal dosimeter is held between the pedestal and the film.

According to the above construction, the personal dosimeter is pressed and held between the pedestal and the pedestal by the elastic action of the transparent film. Also, a string is attached to the personal dosimeter, and even if a part of the string wraps around the upper surface of the personal dosimeter, local deformation of the film can allow such a protruding part, and in that case, Also, it is possible to stably hold the personal dosimeter as a whole. The transparent film is deformable and stretchable, and returns to its original shape (planar shape) when the personal dosimeter is not pressed. If it is a transparent film, it will not hinder the above-described fluoroscopic observation.

Preferably, the upper container is in contact with the clip or the upper surface of the personal dosimeter when the personal dosimeter is to be stored in an improper orientation, and the transparent film in the normal storage state. The contact body is formed in a form that does not reach the upper surface of the personal dosimeter via. According to this configuration, accommodation in a state other than the normal accommodation state can be refused due to the presence of the contact body.

Preferably, the contact body is provided at a position horizontally displaced from above a display unit of the personal dosimeter in the proper accommodation state. According to this configuration, the contact body does not interfere with the fluoroscopic observation of the display unit in the normal accommodation state.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a preferred embodiment of a storage case according to the present invention, and FIG. 1 is a sectional view thereof.
The storage case 10 is a case for housing and storing a personal dosimeter for measuring radiation.

In this embodiment, the storage case 10 is
It is roughly composed of a lower container 12 and an upper container 14. The lower container 12 and the upper container 14 are each formed of a transparent resin or the like. As shown in FIG. 2, the upper container 14 is provided to be openable and closable with respect to the lower container 12, and when the upper container 14 is closed with respect to the lower container 12,
An accommodation space for the personal dosimeter 16 is formed inside them.

In FIG. 1, a personal dosimeter 16 is used by each worker in a radiation handling facility or the like, and has a semiconductor sensor 20 for detecting radiation therein. Further, a display unit 18 is provided, and the display unit displays a dose rate as a measurement result of the radiation. A clip 22 that can be opened and closed with respect to the main body of the personal dosimeter 16 is provided on a first surface (a lower surface in FIG. 1) of the personal dosimeter 16. Personal dosimeter 16
The clip 22 is located on the front side of the cloth in the breast pocket in a state where the body of the breast pocket is stored in the breast pocket or the like of the operator. In this state, the sensitive surface on which the semiconductor sensor 20 is provided is exposed to the outside from above the breast pocket.
The above-mentioned display unit 18 is provided on the second surface (the upper surface in FIG. 1) of the personal dosimeter 16, and the display unit 18 is, for example, a liquid crystal display.

A reed switch 21 is provided in the main body of the personal dosimeter 16 as shown. The reed switch 21 operates by receiving a magnetic force from a magnet 28 described later.
It has a function to turn off the power of the. That is, the personal dosimeter 16 is a so-called switchless type personal dosimeter. When the personal dosimeter is stored in the storage case 10 in a correct direction, the reed switch 21 comes close to the magnet 28, and as a result, The reed switch 21 operates and the power of the personal dosimeter 16 is turned off. In this state, the display contents of the display unit 18 disappear. On the other hand, when the personal dosimeter 16 is taken out of the storage case 10, the reed switch 21 performs an operation of returning to the original state, and as a result,
The power of the personal dosimeter 16 is turned on, and the measurement of radiation resumes. According to such a configuration, it is possible to prevent the power from being accidentally turned off during use of the personal dosimeter.

Describing the storage case 10 further, the lower container 12 is provided with two pedestals 24 and 26 as shown in FIG. The pedestal 24 is provided on one end side of the lower container 12, a groove 24A is formed on the upper surface side, and a magnet 28 is fixedly disposed inside the groove 24A. The pedestal 24 is formed with a depression 24B for positioning and holding one end of the personal dosimeter 16. In FIG. 1, there is a slight gap between the upper surface of the magnet 28 and the lower surface of the personal dosimeter 16. You may do so. However, by forming such a small gap, direct joining can be avoided, and as a result, the surface of the personal dosimeter 16 can be prevented from being damaged by the magnet 28. On the other hand, a pedestal 26 is provided on the other end side of the lower container 12 as shown in FIG.
A recess 26A for positioning and holding the nozzle 6 is formed. The pedestals 24 and 26 are made of a relatively hard elastic member such as urethane, for example.
Incidentally, when the personal dosimeter 16 is positioned and held by these pedestals 24 and 26, the lower half side of the personal dosimeter 16 in FIG. 1 is stored in the pedestals 24 and 26.

A clip 2 is provided between the pedestal 24 and the pedestal 26.
2 is formed. This space 30
Has a function of accommodating the clip 22 and a personal dosimeter 16.
It also functions as a space for accommodating a string when a string is attached to the string.

The upper container 14 is provided with a durable and elastic transparent film 32 along the opening surface thereof with a constant tension. Specifically, the peripheral portion of the transparent film 32 is attached to the opening edge portion of the upper container 14.
In this case, an adhesive or the like can be used, or a method such as heat welding can be used. In any case, it is desirable that the transparent film 32 be made of a material which has a certain degree of durability and is capable of expanding and contracting and having a function of returning to its original shape after deformation.

According to the above configuration, when the upper container 14 is put on the lower container 12 in a state where the personal dosimeter 16 is positioned and stored in the lower container 12, the transparent film 32 is formed in accordance with the amount of protrusion of the upper part of the personal dosimeter 14. Is deformed upward in FIG. 1, and as a result, the pressing force due to the elastic deformation of the transparent film 32 acts on the personal dosimeter 16.
That is, the personal dosimeter 16 is stably held between the transparent film 32 and the two pedestals 24 and 26. Even if the pedestals 24 and 26 have a processing error or a positioning error, the transparent film 32 exerts a pressing action from above to below as a whole. Even if there is a factor, the personal dosimeter 16 can be reliably pressed and held without rattling.

Incidentally, an iron plate or the like may be provided on the lower surface side of the magnet 28 in FIG. 1 for shielding the lines of magnetic force, but in this embodiment, the storage case 1 is provided.
Since 0 has a certain thickness, even if a plurality of storage cases 10 are stacked, malfunction of the reed switch 21 between the plurality of personal dosimeters 16 is prevented.

In FIGS. 1 and 2, a lock mechanism in a state where the upper container 14 is placed on the lower container 12 is not shown, but, for example, an engagement mechanism is provided.
Further, in the present embodiment, one side of the lower container 12 is connected to one side of the upper container 14, and the connection portion functions as an opening / closing support portion. It may be provided.

According to the embodiment shown in FIGS. 1 and 2,
As described above, the two pedestals 24 and 26 and the transparent film 3
By the action with 2, the personal dosimeter 16 can be securely held between them and stably held. In such a state, the power of the personal dosimeter 16 is turned off by operating the reed switch 21 provided inside the personal dosimeter and the magnet 28, and the reed switch 21 is operated. It can be seen through the upper container 14 and the transparent film 32 that the display contents on the display unit 18 have been erased. Incidentally, it is possible to form a part of the upper container 14 with a transparent member for such a fluoroscopic observation. However, if the upper container 14 is formed with a plurality of members as described above, the manufacturing cost increases. In the embodiment, the entire upper container 14 and lower container 12 are formed of a transparent member.

FIG. 3 shows another embodiment.
The same components as those of the embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

In the embodiment shown in FIG. 3, the upper container 14
Abutments 14A, 14B projecting downward from the ceiling surface of the vehicle
Are formed. These contact members 14A and 14B are members against which the clip 22 or the like collides when the personal dosimeter 16 is erroneously stored in an inappropriate direction. For example, FIG. 3 shows a normal storage state, but assuming that the personal dosimeter 16 is turned upside down, the clip 2
2 collides with the contact body 14A, and as a result, the lid of the upper container 14 cannot be closed. Also, the personal dosimeter 16 is shown in FIG.
Assuming that the case is reversed in the left-right direction at
As a result, the clip 22 is placed on the clip 4, so that one end of the personal dosimeter 16 is lifted up by the clip 22, so that one end of the dosimeter 16 collides with the contact member 14B via the transparent film 32. In this case, too, the upper container 14 cannot be closed.

Further, assuming that the personal dosimeter 16 is turned left and right and up and down from the state shown in FIG. 3, the clip 22 collides with the contact body 14B via the transparent film 32 in the same manner as described above. Becomes the upper container 1
4 cannot be closed. Therefore, by forming at least two abutting bodies 14A and 14B as described above, the personal dosimeter 16 is stored in the storage case 10 in a wrong direction.
It can be prevented from being stored inside,
As a result, it is possible to ensure the power-off operation and the see-through confirmation of the display unit 18 described above. By the way, contact body 1
4A and 14B are transparent films 3 in the normal storage state.
It is desirable that the projection amount is such that it does not hit the personal dosimeter 16 via the second unit 2, and it is desirable that the projection is shifted in the horizontal direction from above the display unit 18 and that the contact action described above is obtained. .

FIGS. 1 to 3 show the storage case 10 for accommodating a so-called pen-type personal dosimeter 16.
Even in the case of storing a flat type personal dosimeter that spreads in the horizontal direction, it is possible to manufacture the storage case with the same configuration as above, that is, adjust the form of the storage case according to the form of the personal dosimeter 16. I just need.

[0031]

As described above, according to the present invention,
It is possible to provide a storage case that can secure an appropriate storage state of the personal dosimeter.

[Brief description of the drawings]

FIG. 1 is a sectional view of a storage case according to the present embodiment.

FIG. 2 is a side view of the storage case according to the embodiment.

FIG. 3 is a sectional view of a storage case according to another embodiment.

[Explanation of symbols]

10 storage case, 12 lower container, 14 upper container, 16
Personal dosimeter, 18 display unit, 20 semiconductor sensor, 21
Reed switch, 22 clips, 24, 26 pedestal, 28 magnet, 30 space, 32 transparent film.

Claims (5)

[Claims] 1. A storage case comprising a lower container and an upper container which opens and closes with respect to the lower container, and a personal dosimeter is housed inside the case, wherein the lower container has a proper orientation inside the case. A magnet is provided at a position close to the power-off magnetically sensitive switch of the personal dosimeter in the normal housing state in which the personal dosimeter is housed, and all or a part of the upper container is in the normal housing state of the personal dosimeter. In order to observe the display unit of the personal dosimeter, the personal dosimeter has transparency, in the normal accommodation state of the personal dosimeter, the power-off magnetically sensitive switch operates to turn off the personal dosimeter. The storage case for the personal dosimeter, wherein the display unit of the personal dosimeter can be observed through the upper container in this state. 2. The storage case for a personal dosimeter according to claim 1, wherein the lower container and the upper container are entirely formed of a transparent member. 3. The storage case according to claim 1, wherein a pedestal for positioning and holding the personal dosimeter is provided inside the lower container while permitting accommodation of a clip protruding from a lower surface of the personal dosimeter. The upper container is provided with a transparent film having elasticity covering an opening surface thereof, and the personal dosimeter is sandwiched between the pedestal and the film. Case. 4. The storage case according to claim 1, wherein the upper container abuts on the clip or the upper surface of the personal dosimeter when the personal dosimeter is to be stored in an inappropriate orientation, and The storage case for a personal dosimeter, wherein the contact body is formed so as not to reach the upper surface of the personal dosimeter via the transparent film in the normal accommodation state. 5. The storage case according to claim 4, wherein the contact body is provided at a position horizontally displaced from above a display unit of the personal dosimeter in the proper accommodation state. Storage case for dosimeter.