JPH0435040B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a prefabricated radiation protection screen, and particularly to a prefabricated radiation protection screen that can freely vary the shielding area and has a good radiation shielding effect. It is something.

(Prior Art) Lead is used to shield radiation, such as X-rays, and conventional radiation protection screens use a single large lead plate to shield radiation.

(Problems to be Solved by the Invention) Therefore, the radiation protection screen, which is moved when the radiation equipment is moved, has the disadvantage that it is heavy and difficult to move, and also has the disadvantage that it gets in the way when not in use.

The purpose of the present invention is to solve the above-mentioned drawbacks.In addition to shielding radiation, the present invention is an assembly type that can freely change the shielding area, can be moved freely, and can be kept small when not in use. It is intended to provide a radiation protection screen.

(Means for Solving the Problems) For this purpose, the prefabricated radiation protection screen of the present invention has an extendable frame body provided with guide posts on both sides, and a step formed on both end faces of one side.
A rectangular member having grooves formed on the other end face is provided, and the member is provided with two parallel shielding plates arranged in a form shifted in the above-mentioned different directions, and the above-mentioned end face is provided with a rectangular member having grooves formed therein. A plurality of shielding panels comprising auxiliary shielding plates arranged parallel to the shielding plates at different levels, and supporting the assembled shielding plates by guiding the grooves provided in the shielding panels. , and a holding plate provided with a shielding member for shielding the seam of the shielding panel, and is characterized in that the shielding area can be freely expanded and contracted. An embodiment of the present invention will be described below with reference to the drawings.

(Example) Fig. 1 is an assembly diagram of an assembled radiation protection screen according to the present invention, Fig. 2 is a configuration diagram explaining the structure of the shielding panel, Fig. 3 is a side view thereof, and Fig. 4 is a diagram showing the construction of the shielding panel. Figure 5 is a sectional view taken along line A-A in Figure 1, Figure 6 is a sectional view taken along line B-B in Figure 1, and Figure 7 is a front view of a shielding panel in which a window is provided. , FIG. 8 shows a longitudinal sectional view thereof.

In FIG. 1, a guide post 1 is provided on both sides to be freely extendable and retractable, and an upper end frame 2 and a lower end frame 3 are attached to the upper and lower ends of the guide post 1. As shown in FIG. These upper end frames 2 and lower end frames 3
It also has a structure that allows it to expand and contract freely. The frame body consisting of the guide post 1, the upper end frame 2, and the lower end frame 3 becomes a framework adapted to the number of shielding panels 4. A presser plate 5 for supporting the shielding panel 4 is provided between the upper end frame 2 and the lower end frame 3, to make the assembly of the shielding panel 4 firm, and to prevent the assembly of the shielding panel 4 from breaking during use of the radiation device and preventing human body. It prevents people from being exposed to radiation. A caster 6 is provided on the lower end frame 3, and a caster 6 can be attached in the middle, so that the structure is able to withstand the weight of the shielding panel 4 and is designed for convenience when moving. There is.

The number of shielding panels 4 can be freely increased in each direction of height and width, and the shielding area can be changed. Next, the structure of this shielding panel 4 will be explained using FIGS. 2 to 4.

The shielding panel 4 includes two shielding plates arranged in parallel and whose arrangement positions are shifted up and down.
For example, it has a structure in which a member 9 is sandwiched between lead plates 7 and 8 like a sandwich, and radiation is shielded by the lead plates 7 and 8. The end face of the shielding panel 4 is formed as follows. That is, Figures 2 to 4
As shown in the figure, steps are formed on both end faces in the vertical direction, and grooves 9a are formed in both end faces in the left and right direction. Then, the lead plates 10 and 11 of the auxiliary shielding plate are parallel to the lead plates 7 and 8 on the side where there is no notch in the stepped portion formed on both end faces in the vertical direction, and each lead plate of the auxiliary shielding plate is parallel to the lead plates 7 and 8. The heights h of the steps 10 and 11 are selected to be larger than the height H of the different steps, respectively.

The member 9 is made of a lightweight material, such as synthetic resin, light metal, wood, etc., to reduce the weight of the shielding panel 4. Therefore, holes or the like may be provided in the member 9 to reduce the weight.

The surfaces of the lead plates 7, 8 are covered with decorative plates 12, 13 such as thin iron plates or aluminum plates. Member 9, lead plates 7, 8, 10, 11 and decorative boards 12, 13 are pasted together with adhesive or the like, or decorative boards 10, 1
By folding the ends of the lead plates 7 and 8, the lead plates 7 and 8 are integrated without making holes.

FIG. 5 shows a cross section taken along line A-A in FIG.
5 is installed. One end of the shielding panel 4 is inserted into the groove of the guide plate 15, and the other end is supported by a holding plate 5. The presser plate 5
is provided with a convex guide part 17 in the center, and the convex guide part 17 is connected to the groove 9 provided in the shielding panel 4.
Guide a. A shielding member for shielding, for example, two lead plates 18 and 19, is inserted into the interior of the convex guide portion 17 with a member 20 sandwiched therebetween. The lead plates 18 and 19 of the shielding member cover the seam between the left and right end surfaces of the shielding panel 4, thereby completely shielding radiation. As is clear from this explanation, the holding plate 5 completely shields the joint portion in the width direction of the shielding panel 4, and at the same time serves as a guide when assembling a radiation protection screen using the shielding panel 4. It plays the role of reinforcing the strength of the target. The joint portion of the shielding panel 4 in the height direction is shielded by lead plates 10 and 11 provided at different levels on both end faces of the shielding panel 4 in the vertical direction.

FIG. 6 shows a cross section taken along the line BB in FIG. 1, and shows the joint between the upper and lower end surfaces of the shielding panel 4. As shown in FIG. Reference numerals 7 to 13 correspond to those in FIGS. 1 to 3, and the two shielding panels 4 are mechanically combined by stepped portions formed at the lower and upper ends of each shielding panel 4, respectively. There is. The surfaces of the two shielding panels 4 are covered with respective lead plates 7 and 8, with straight seams at positions C and D. C
The straight seam at D is substantially covered by the lead plate 8 and the lead plate 11 of the auxiliary shielding plate having a height h higher than the step height H; It is substantially covered by the plate 7 and the lead plate 10 of the auxiliary shielding plate having a height h higher than the height H of the step. Therefore, radiation is completely blocked even at the vertical seam of the shielding panel 4.

Also, regarding the corner part of the shielding panel 4,
As is clear from the above explanation of the shielding of the joints in the width direction and the vertical direction, the lead plates 17 and 18 of the convex guide portion 17 provided on the holding plate 5 and the lead plates provided at the different level portions of each shielding panel 4 10 and 11.

In addition to having the entire surface of the shielding panel 4 made up of lead plates 7, 8, etc., a window can be provided in the shielding panel 4 by using lead glass that shields radiation. This window-equipped shielding panel is shown in FIGS. 7 and 8.

7 and 8, a window 21 is provided in the center of the shielding panel 4, and a lead glass 23 for shielding radiation is fitted into the window 21 via a packing 22. Window 2 in the center of the shielding panel 4
1 is provided, and a lead glass 23 is fitted into the window 21.
8, 10, 11, etc. have the same structure as the shielding panel 4 shown in FIG. This shielding panel with window 4
If it is used at the top of the assembly diagram shown in FIG. 1, the opposite side can be seen through, making it easier to work.

When using a prefabricated radiation protection screen using these shielding panels, several types of shielding panels with different thicknesses of the lead plates 7 and 8 provided on the shielding panel 4 are prepared. If you assemble a screen using thick lead shielding panels in areas where the radiation intensity is high and shielding panels with thin lead plates in areas where the radiation intensity is low, you can achieve a good shielding effect. , and a lightweight radiation protection screen can be realized.

Further, in the above explanation, the shielding panel 4 is supported using the presser plate 5 between the upper end frame 2 and the lower end frame 3, but the shielding panel 4 is supported using the presser plate 5 between both sides of the guide post 1. can also be supported. At this time, it goes without saying that the height difference and groove 9a formed on both end faces of the shielding panel 4 in the vertical and width directions, that is, in the left and right directions, must be replaced with each other.

(Effects of the Invention) As explained above, according to the present invention, the height and width of the shielding area can be freely changed depending on the number of shielding panels used, and the joints of the shielding panels can also be completely covered by the shielding plate. It is possible to realize a prefabricated radiation protection screen that completely shields radiation. Furthermore, since the shielding panel can be assembled with shielding plates having different thicknesses depending on the intensity of radiation, the shielding efficiency can be increased and the weight of the screen can be reduced. Since the screen can be assembled using a shielding panel with a window, the situation on the other side can be seen through, making it easier to work. Since it can be disassembled into small pieces when not in use, storage is convenient and the screen can be easily transported over long distances.

[Brief explanation of drawings]

Figure 1 is an assembly diagram of the assembled radiation protection screen according to the present invention, Figure 2 is a configuration diagram explaining the configuration of the shielding panel, Figure 3 is its side view, and Figure 4 is the bottom view of Figure 2. Figure 5 is a sectional view taken along line A-A in Figure 1, and Figure 6 is
The figure shows a sectional view taken along the line BB in FIG. 1, FIG. 7 shows a front view of a shielding panel in which a window is provided, and FIG. 8 shows a longitudinal sectional view thereof. In the figure, 1 is a guide post, 2 is an upper end frame, 3 is a lower end frame, 4 is a shielding panel, 5 is a holding plate, 6 is a caster, 7 and 8 are lead plates, 9 is a member, 10 and 11 are lead plates , 12 and 13 are decorative boards, 14 is a post, 15 is a guide plate, 17 is a convex guide portion, 18 and 19 are lead plates, 20 is a member, 21 is a window, 22 is a packing, 2
3 represents lead glass.

Claims (1)

[Claims] 1. An extendable frame body provided with guide posts on both sides, and a step formed on both end faces of one side,
A rectangular member having grooves formed on the other end face is provided, and the member is provided with two parallel shielding plates arranged in a form shifted in the above-mentioned different directions, and the above-mentioned end face is provided with a rectangular member having grooves formed therein. A plurality of shielding panels each including a plurality of auxiliary shielding plates arranged parallel to the shielding plates at different levels, and guiding the grooves provided in the shielding panels to support the assembled shielding panels, and a shielding panel. A prefabricated radiation protection screen characterized by comprising a holding plate provided with a shielding member for shielding the joints of panels, and the shielding area can be freely expanded and contracted. 2. The prefabricated radiation protection screen according to claim 1, characterized in that a lead glass window is provided in the center of the shielding panel so that it can be seen through.