JP3387841B2 - Rotating shield door device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revolving type shield door device which is useful as an entrance and exit of a room in an irradiation facility for radiation or the like.

[0002]

2. Description of the Related Art In a radiation irradiation facility, the wall thickness is made large so that the radiation used for irradiation does not leak outside the facility, specifically, outside the irradiation chamber for radiation. The door of the entrance / exit is formed to be solid and long.

However, since the conventional entrance / exit shielding doors are of the left / right or front / rear sliding type opening / closing type or the swing type opening / closing type using hinges, for example, the entrances / exits of two rooms are arranged next to each other. However, it was necessary to provide a shielding door of the above type for each entrance and exit. However, if this type of shielding door is provided for each entrance / exit, the door itself also has a radiation shielding function, and therefore, for example, the thickness of the door is around 1 m or more, and the weight is several tons. Since several tens of tons can be installed, providing such a shielding door at each doorway requires a space for opening and closing each door, and a drive mechanism and drive source for opening and closing operation for each door. In terms of space efficiency, equipment cost, and equipment labor, it was not in a reasonable situation.

[0004]

The present invention realizes a high radiation shielding property in such a radiation irradiation facility, while at the same time, for the radiation irradiation facility aiming at space efficiency at the time of opening and closing and simplification of the drive mechanism of the shielding door. It is an object of the present invention to provide a shield door device of the above.

[0005]

The structure of the shield door device of the present invention made for the purpose of solving the above-mentioned problems is such that the entrance / exit of a radiation irradiation chamber in a radiation irradiation facility has an outer wall surface near the entrance / exit of the radiation irradiation chamber. and forming so as to form a concave arcuate, outwardly of the doorway, with arcuate surface concentric circular turntable having a center and said wall outer surface on its side
The top of the table is slightly lower than the floor of the doorway.
Disposing a turntable formed so had become position
On the other hand, on the periphery of the turntable, a door body having a predetermined thickness and an outer surface having a convex arc shape corresponding to the concave arc surface of the wall outer surface is erected , and the front surface of the turntable upper surface is provided.
The part where the door body is not erected is approximately the same as the floor of the doorway.
The door is opened and closed by the door body by rotationally positioning the turntable.

In the present invention, the outer surface of the door body and the outer surface of the entrance / exit wall in the above construction are made of steel. Specifically, a steel plate frame body may be used in which concrete is cast to form a door body and an entrance / exit wall. Further, the door body may be formed of a solid steel material or may be formed by filling a steel plate frame body with a synthetic resin sphere or the like. The configuration of the door body is selected according to the type of radiation to be applied. Such a door body
By forming the outer surface into a substantially semi-circular shape when viewed from a plane, one entrance and, of course, two
It is also possible to simultaneously close three to three or more entrances / exits with a single door, and to open each individual entrance / exit.

According to the present invention, the turntable is formed such that its upper surface is located at a position slightly lower than the floor surface of the entrance and exit, and the door body is arranged on the turntable. Since the portion not provided is formed to be substantially flush with the floor surface of the doorway, the floor surface of the doorway in the open state and the upper surface of the turntable in contact therewith are substantially flush with each other. There is no step at the boundary between the doorway and the top surface of the turntable.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 is a plan sectional view of an example of the shielding door device of the present invention, FIG. 2 is an elevation view of the door device of FIG. 1, and FIG. 3 is a sectional view of the door device of FIG.

In FIG. 1, reference numerals 1 and 2 denote irradiation chambers for radiation and the like arranged adjacently to each other, and reference numerals 3, 4 and 5 denote partition walls for separating the two chambers 1 and 2 and a corridor. It is formed by a concrete wall with a thickness of at least 1 m. Reference numerals 6 and 7 denote entrances and exits formed in the two chambers 1 and 2. In the illustrated example, the center lines of the entrances and exits 6 and 7 intersect outside the compartments 1 and 2 at an angle of about 45 degrees.

In FIG. 1, reference numeral 8 is an intersection of the center lines of the entrances and exits 6, and the outer surface side of the entrances and exits 6 and 7 and the wall surfaces 3, 4 and 5 in the vicinity thereof are concave curves centered on the intersection 8. Face 3
It is formed on a, 4a and 5a.

Then, on the floor 9 where the intersection 8 is located,
A turntable having a radius inscribed in the curved surfaces 3a, 4a, 5a
A pit 11 is rotatably supported by a shaft 12 in a pit 11 formed on the floor 9.

In the pit 11, there are provided four free support rollers 13 for rotatably supporting the lower surface on the outer peripheral side of the turntable 10 from below at a pitch of 90 degrees. 45 degrees out of phase with roller 13,
Here, four sets of drive rollers 14 rotated by the output of the motor 15 are provided at a pitch of 90 degrees. In the present invention, the number of support rollers 13 and drive rollers 14 installed is
In consideration of the total weight of the shielding door, which will be described later, and the diameter of the turntable 10, including the turntable 10, at least three rollers 13 and 14 are provided at a pitch of 120 degrees, but the total number of rollers 13 and 14 are supported. Is an arbitrary design matter.

Reference numeral 16 denotes a door having an arcuate wall when viewed from a plane which is erected on the outer circumference of the turntable 10 in a substantially semicircular shape,
The inner and outer surfaces of the door are formed into arcuate surfaces concentric with the point 8 which is the center of rotation of the turntable 10. In the illustrated example, since the center point 8 is positioned on the extension line of the outer surface of the wall 3 of the building, the doorways 6 of the chambers 1 and 2 shown in FIG.
In the closed state of 7, the both end surfaces 16a, 16b of the door 16 are
It is formed so as to be aligned with the outer surface of the wall 3.

Here, in the turntable 10,
The portion where the door 16 is erected is formed on a surface (lower surface) 10a slightly lower than the surfaces of the floor 9 outside the room and the floor 91 inside the rooms 1 and 2, and the door 16 is erected on this surface 10a. By doing so, the lower end portion 16c of the door 16 is positioned below the floor 91 to enhance the shielding performance when the door is closed. Meanwhile, the door 16 of the turntable 10
The remaining surface on which is not erected is formed on the same surface as the floors 9 and 91 by laminating the upholstery member 10b, and the surface on which the doors 16 of the floors 9 and 91 and the turntable 10 are not provided (upper surface). The upper surface of the tension member 10b) is continuous with a step-less surface so that traveling of a stretcher, a wagon, etc. is not hindered.
In the present invention, the upper surface of the table 10 is formed on the same surface as the floors 9 and 91, and only the portion where the door 16 is erected is depressed to lower the surface 10.
It may be formed into a.

According to the present invention, the doorways 6 and 7 of the walls 3, 4 and 5 and the curved surfaces 3a, 4a and 5a and the door 16 formed in the vicinity thereof are formed by placing concrete on a steel plate frame. By doing so, the shielding property of the wall and the door itself is enhanced, and the smoothness of the rotating operation when opening and closing the door 16 by increasing the accuracy of the curved surface is ensured. I am able to secure it. In the figure, 15a, 15b, 15c
Are a control panel and an operation panel of a motor 15 which is a drive source for opening and closing the door 16 arranged outside the room and inside the rooms 1 and 2, and thus form one example of the shielding door device of the present invention.

The shielding door device of the present invention formed as described above is operated as follows. First, the state shown in the figure is
Since the two doorways 6 and 7 are both closed by the door 16, when either one of the doorways 6 and 7 is opened, the turntable 10 is clocked from the closed position shown in FIG. For example, if the doorway 6 is rotated in the clockwise direction by 90 degrees, the doorway 6 is opened and the doorway 7 is kept closed, while if it is rotated 90 degrees in the counterclockwise direction, only the doorway 7 is opened and the doorway 6 is closed. Is retained. In order to open the doors 6 and 7 at the same time, the turntable 10 may be rotated so that one end surface 16a of the door 16 is located on the right side of the door 7 in FIG.

The rotation operation of the door 16 integrated with the turntable 10 is performed by disposing four drive rollers 14 arranged in the pit 11 on the lower surface of the turntable 10 in the chambers 1 and 2 in this example.
The motor 15 of each roller 14 is operated by operating the operation buttons (not shown) of the control panel 15a or the operation panels 15b and 15c inside or outside the
By performing normal rotation or reversal. In the illustrated example, the turntable 10 includes the above-mentioned four driving rollers 14 and four free supporting rollers arranged between the rollers 14.
Since it is also supported by 13, the total weight of the door 16 including the turntable 10 is supported from the lower surface by a total of eight rollers, and thus the total weight may be several tens of tons. Even with the shield door, it is possible to smoothly perform the opening / closing operation by rotating the turntable 10.

[0018]

The present invention is as described above, and the entrance / exit of the radiation irradiation chamber in the radiation irradiation facility is formed so that the outer wall surface in the vicinity thereof including the entrance / exit has a concave arc shape. On the outside, a circular turntable having its center on the side and concentric with the circular arc surface of the wall outer surface is arranged, and on the peripheral edge of the turntable, there is a predetermined thickness and the outer surface is a concave arc surface of the wall outer surface. Since the door for the entrance and exit is formed by erected a door body having a convex arc shape corresponding to, it is possible to smoothly open and close the door body regardless of the weight of the door body, and especially for a large door. A smooth opening / closing operation can be realized in a heavy door body.

Further, according to the present invention, since a pair of shielding door devices can be used to open and close doors, even if there are two or more entrances / exits, it is possible to slide the doors forward / backward or left / right. Compared to the case of installing a door device equipped with a drive source such as a slide type, there is no need to install the door device, and a control system for opening and closing the door is only one system, which is simple and easy. is there.

Further, in the case where a slide opening / closing type door device is provided at each entrance / exit, it is necessary to secure a door space at the time of opening each door so that both spaces do not interfere with each other. Although an extra space was required, the door device of the present invention is advantageous in terms of space because it only requires a space in which one door can be turned. In particular,
Conventionally, when two slide-type or swing-type doors cannot secure a space that does not interfere with each other at the time of opening the door, it was necessary to consider the operational aspects such as restricting the opening timing of both doors. The present invention does not require such consideration.

In addition, in the turntable in the door apparatus of the present invention, the upper surface of the turntable is formed at a position slightly lower than the floor surface of the doorway, and the door body is disposed on the upper surface of the turntable. Since the part where the body is not placed is formed so as to be substantially flush with the floor surface of the entrance / exit, of course the shielding of the door and entrance / exit is not impaired when the door is closed, and of course the turntable and entrance / exit are opened. Since there is no step between the inner and outer floor surfaces, there is a particular effect that there is no hindrance to running of the stretcher or the like.

Therefore, the shielding door device of the present invention is very useful as a shielding door in an irradiation facility for radiation or the like, especially when two or more entrances are provided close to each other.

[Brief description of drawings]

FIG. 1 is a plan sectional view of an example of a shielding door device according to the present invention.

FIG. 2 is an elevation view of the door device of FIG.

3 is a sectional view of the door device of FIG.

[Explanation of symbols]

1, 2 irradiation room 3,4,5 Partition walls 3a, 4a, 5a concave curved surface 6,7 Doorway 8 The intersection of the entrance and exit centerlines 9,91 floors 10 turntable 11 pits 12 axes 13 Support roller 14 Drive roller 15 motor 16 doors

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Shinji Arai 1-6-11 Awaji-cho, Chuo-ku, Osaka-shi, Osaka Itoki Co., Ltd. (56) References Japanese Patent Laid-Open No. 59-159091 (JP, A) ) JP-A-60-166896 (JP, A) JP-A-8-36093 (JP, A) JP-A-54-123697 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G21F 3/00 E06B 3/90 G21F 7/005

Claims (3)

(57) [Claims] 1. An entrance / exit of a radiation irradiation chamber in a radiation irradiation facility is formed such that an outer wall surface in the vicinity thereof including the entrance / exit has a concave arc shape, and outside the entrance / exit.
A circular turntable having a center on that side and concentric with the circular arc surface of the outer surface of the wall , and the upper surface of the table is the entrance / exit.
A turntable formed so as to be slightly lower than the floor surface of the mouth is provided , and a convex circle having a predetermined thickness and having an outer surface corresponding to the concave arc surface of the wall outer surface is provided on the periphery of the turntable. Along the arc-shaped door body,
Front part of the table top where the door is not erected.
A rotary shield door device, characterized in that it is formed so as to be substantially flush with the floor surface of the entrance / exit, and the entrance / exit is opened / closed by the door body by rotationally positioning the turntable. 2. The rotary shield door device according to claim 1, wherein the door body is provided for two or more doorways. 3. An outer surface of the door body is formed in a substantially semi-circular shape when viewed from a plane, so that a plurality of doorways can be simultaneously closed by one door body and each doorway can be opened. The revolving type shield door device according to item 1 or 2.