JP5921299B2 - Control area boundary barrier - Google Patents

Description

  The present invention relates to a barrier installed at a boundary of a management area partitioned by a work place or the like.

  For example, when disassembling and inspecting equipment during a periodic inspection at a nuclear power plant, in order to prevent the spread of radioactive materials and the spread of contamination, a work area is set up and a control area is set up. It controls or restricts access to and from goods. At that time, a partition member called “barrier” is used to indicate the boundary between the partitions.

  The following Patent Document 1 illustrates an example of a work area partitioned in such a manner. Here, in the management area divided into a plurality of sections according to the environmental level due to the radioactive substance, a barrier is installed at the boundary of each section. An operator goes in and out (or steps on) across each barrier.

  In this example, a worker who enters for work approaches the work place across three barriers. Before reaching the work place, the worker first takes off his shoes at the entrance and switches over to the work shoes across the three barriers.

  In addition, the worker who leaves after completing the work sequentially takes off the radiation pollution protection equipment he wears every time he crosses the barrier. In other words, the worker takes off the work shoes in front of the barrier closest to the work place, then enters the next section across the barrier, where he takes off protective clothing and gloves, and installs them in the section. Put it in the bag. After that, straddle the next barrier, enter the next section, go over the barrier ahead and wear shoes to get out of the work place.

  As described above, the barrier used at the boundary between the compartments has conventionally been formed in a wooden box shape or a plate shape that is not self-supporting with wood, and thus has a problem of lack of fire resistance. In addition, the barrier is required to have sufficient strength because an operator may get on or step on the barrier. Therefore, in the case of wood, heavy lauan material is used, but if the strength is further increased, the weight increases. However, in a situation where many workplaces are installed for each periodic inspection at a nuclear power plant and are repeatedly dismantled after use, it is necessary to reduce the weight of the barrier.

  Therefore, recently, a rectangular parallelepiped barrier made of polystyrene foam is manufactured, and in a place where a long barrier is required, a plurality of barriers of various lengths are used in series.

Japanese Patent Laid-Open No. 2001-17559

  However, the above-mentioned styrene foam and rectangular parallelepiped barrier has the following problems.

  Since the material is a flammable material called foamed polystyrene, it is very vulnerable to fire. In contrast, a metal such as stainless steel increases the weight and makes the barrier difficult to handle.

  Since the shape is a rectangular parallelepiped, a situation in which a person's feet or items are placed on the barrier indicating the boundary of an area important for radiation management frequently occurs.

  Conventional products have a cross section of 30 cm x 20 cm, lengths of 50, 60, 70, 85, 90 cm, etc., and are available in various sizes. When installing in a wide area, fix several places with tape. There is a need. Further, when the inspection is completed and the barrier is cleared, a lot of waste such as a curing sheet and a tape is generated.

  Since the number of barriers used in the periodic inspection may be several thousand, a large storage space is required when installing and removing the barriers. In addition, a large transport cart is required for transport.

  In view of the above circumstances, an object of the present invention is to provide a barrier that is easier to handle, requires less storage space, and has fire resistance.

The present invention is a barrier installed at the boundary of a management area, and is a plurality of barrier bodies formed of a flame-retardant material and having a transversely long longitudinal section with an isosceles triangular shape or a trapezoidal hollow structure similar thereto Are connected to each other through a connecting member in which both ends in the transverse direction are opened with a flame-retardant material and the longitudinal section is formed in a shape similar to that of the barrier body. It has the connecting member, a position on the bottom surface adjacent to the lower side of the side walls, wherein the protrusion is intended to be constituted by perforated holes to be fitted.

  According to the present invention, the barrier main body and the connecting member, which are members constituting the barrier, have an isosceles triangular shape or a trapezoidal shape similar thereto, and therefore, when the barrier is assembled or disassembled and stored in each member. In this case, the storage space can be made smaller than that of the conventional rectangular parallelepiped shape by superimposing the respective members upside down.

  Since the barrier of the present invention can basically be composed of two types of the barrier body and the connecting member, even if other forms of members are added to the configuration, the number required is smaller than the above two types. It is easy to manage the inventory and storage of components.

  Since the barrier of the present invention is composed of a member made of a flame retardant material, the barrier is suitable for use at the boundary of a control area of a nuclear power plant where a lot of welding operations are necessary and fire prevention measures are important.

Further , according to the present invention, the barrier body has convex portions at both ends of the lower sides of both side walls, and the connecting member is fitted with the convex portions of the barrier body at positions on the bottom surface adjacent to the lower sides of the both side walls. Therefore , when the barrier body is coupled, the barrier body and the coupling member can be reliably coupled by fitting the protrusion of the barrier body into the hole of the coupling member.

  Further, the barrier of the present invention is configured such that a corner member having a hollow structure in which both ends of a corner portion are open and a longitudinal section is formed in the same shape as the barrier main body can be coupled to the barrier main body via the connecting member. It is preferable. According to this, the barrier corresponding to the boundary of the management area with the corner can be formed.

  Further, the barrier of the present invention is configured such that the barrier body positioned at both ends thereof can be coupled with a terminating member having one end in the lateral direction opened and the other end closed, and a longitudinal section similar to the shape of the barrier body. It is preferable. According to this, it is possible to prevent dust and the like from entering the inside from the end of the barrier.

The perspective view which shows the state by which the barrier of embodiment was assembled. The disassembled perspective view which shows the structural member of the barrier of FIG. It is a figure which shows the barrier main body which is one of the structural members of a barrier, (A) is a perspective view, (B) is a bottom view, (C) is a partial enlarged view. It is a figure which shows the connection member which is one of the structural members of a barrier, (A) is a perspective view, (B) is a bottom view. The figure which shows the process of connecting a main body via the connection member of FIG. It is a figure which shows the composition in the case of arranging a barrier body alone. (A) shows a state where the lower sides of both side walls are widened, and (B) shows a case where a plurality of barrier bodies are arranged with the width of the lower sides narrowed. Shows the state. (A) is a perspective view of a pair of support members, (B) is a plan view thereof. (A) shows the state which attached the supporting member of FIG. 7 to the lower side part of the barrier main body, (B) shows the state which couple | bonded a pair of supporting member.

  Hereinafter, embodiments of the present invention will be described.

  The barrier 1 of this embodiment shown in FIG. 1 is formed by connecting a plurality of the following constituent members. There are four types of constituent members: a barrier body 2, a connecting member (joint) 3, a corner member 4, and a terminal member (end) 5, all of which have a plate-like elasticity such as foamed polypropylene having flame retardancy. The material has a trapezoidal vertical cross section that is close to an approximately isosceles triangle.

  As shown in FIG. 2, among these constituent members, a horizontally long barrier body 2 having a hollow structure and a hollow corner member 4 bent at a right angle in the center include an upper surface that forms the upper side and both sides of the trapezoid. Both sides are walls and the bottom is open. When the bottom surface is opened in this way, the storage space can be made smaller and less than half by stacking the members vertically before or after assembly of the barrier or when disassembling and storing the members.

  The barrier main body 2 and the corner member 4 are coupled to each other at a predetermined position with a connecting member 3 or a terminal member 5 having a longitudinal section similar to the barrier main body 2 in the vicinity of both ends of the lower side of each side wall. The convex part 11 and the recessed part 12 (FIG. 3) are provided.

  On the other hand, the connecting member 3 and the terminating member 5 having a hollow structure that is short in the lateral direction have wall surfaces on the top surface, both side surfaces, and the bottom surface. The connecting member 3 is open at both ends in the lateral direction, but the end member 5 is open at one end connected to the barrier body 2 or the corner member 4, and the other end is free of dust or the like during use. The wall is closed like this. Two holes 13 are formed on both sides at positions on the bottom surfaces 3a and 5a adjacent to the lower sides of both side walls of these members 3 and 5 so that the protrusions 11 of the barrier body 2 or the corner member 4 are fitted. (See FIG. 4).

  As shown in FIG. 3 (C), the barrier body 2 is formed by cutting the both sides of the barrier body 2 by the thickness D of the barrier body 2 while leaving the convex portions 11 in the vicinity of both ends of the lower sides of the both side walls. A recess 12 is formed on the center side of the. Similarly, a convex portion 11 and a concave portion 12 are formed in the vicinity of both ends of the lower side of both side walls of the corner member 4.

  The heights of the convex portions 11 are set to a width d (in order to facilitate removal of the barrier body 2 or the corner member 4 combined with the connecting member 3 or the terminal member 5 when disassembling the barrier 1 assembled as described later. For example, it is shortened by 0.5 mm).

  In addition, since the bottom of the barrier body 2 is opened as described above, in order to prevent the side walls extending in the length direction of the barrier body 2 from warping, the portion between the recesses 12 on both sides of the lower side is formed. The overhanging portion 21 is formed by bending the inside of the bottom surface.

  Further, the upper and lower corners 22 and 23 at both ends in the length direction of the barrier body 2 or the corner member 4 are cut obliquely so that the barrier body 2 or the corner member 4 can be easily inserted when the barrier body 2 or the corner member 4 is combined with the connecting member 3 or the terminal member 5 (Chamfered).

  The barrier of this embodiment is assembled as follows.

  First, the barrier according to the present embodiment is basically formed by connecting a plurality of barrier bodies 2 via a connecting member 3. The length and form of the barrier are determined according to the size of the divided management area or the length of the boundary between adjacent management areas. As a result, the type and number of components to be connected are also determined, and the necessary barriers are assembled at the site where the barriers are installed using these components.

  As shown in FIG. 5, when assembling, first, one end portion of the barrier body 2 in the length direction is first inserted from one end side of the connecting member 3, and the convex portion 11 on the bottom surface portion of the barrier body 2 is connected to the inside of the connecting member 3. The two end portions of the barrier body are coupled and fixed to the connecting member 3.

  Next, the next barrier main body 2 is inserted from the other end side of the connecting member 3, and the convex portion 11 on the bottom surface of the barrier main body 2 is inserted into the hole 13 on the other end side inside the connecting member 3. One end of 2 is coupled and fixed to the connecting member 3. In this way, by connecting the plurality of barrier main bodies 2 or the corner members 4 via the connecting member 3, a length required as a barrier can be obtained.

  Finally, the termination member 5 is coupled to both ends of the barrier to complete the barrier as shown in FIG.

  The barrier 1 of the present embodiment has the following advantages.

  A normal linear barrier can be installed in a wide place or a narrow place without worrying about the dimensions by connecting the barrier body 2 using two types of constituent members, that is, the barrier body 2 and the connecting member 3. The both ends of the barrier may remain open, but it is preferable to join the termination member 5 as shown in FIG. 1 in order to prevent dust and the like from entering the inside. Moreover, when a corner | angular part is required, the corner member 4 can be connected.

  Since this barrier is a trapezoid whose vertical cross section of each constituent member approximates an isosceles triangle, the upper width of each constituent member is narrow. For this reason, it is easy to straddle when the worker moves in the divided management area. Further, in the conventional case, an operator often puts a foot or puts an article on a barrier indicating a boundary of an area important for radiation management. However, in the barrier of the present embodiment, such a situation occurs. Is unlikely to occur.

  Since the members constituting the barrier can be easily connected as described above, the fixing with a conventional tape is small for installation in a wide area. Moreover, when cleaning up, generation | occurrence | production of wastes, such as a curing sheet and a tape, can be suppressed.

  Since the components having the hollow structure as described above can be overlapped, the storage space can be reduced.

  In addition to having a hollow structure for each component member, a lightweight and easy-to-carry barrier can be obtained by being made of flame-retardant foamed polypropylene.

  In addition, by using two colors of yellow and blue for the material of each constituent member, visual discrimination is also possible.

  In the above embodiment, the barrier body 2 is connected to other constituent members using the connecting member 3 in the longitudinal direction. However, when the place where the barrier is arranged is narrow, FIG. As shown, the barrier body 2 may be installed alone without being connected to other members.

  In that case, the barrier body 2 is supported by the pair of support members 31 and 32 at the opposite lower ends of the both side walls, and the lower sides of the both side walls are expanded as shown in FIG. Alternatively, as shown in FIG. 6B, a plurality of barrier bodies 2 are arranged in parallel with each other in a narrowed state.

  As shown in FIGS. 7A and 7B, the pair of support members 31 and 32 are both rectangular flat plates 31a and 32a and a pair of parallel rising pieces 31b that stand up from the center in the longitudinal direction. , 32b. And one side is formed with a recess 31c and the other is formed with a projection 32c on the side of the flat plate 31a, 32a of each support member 31, 32 facing each other, and the other projection 32c is fitted into one recess 31c. Thus, the pair of support members 31 and 32 are coupled.

  Further, as shown in FIG. 8, each support member 31, 32 receives the lower side portions of both side walls of the barrier body 2 between each pair of rising pieces 31 b, 32 b, thereby It comes to support.

  Therefore, when the barrier main body 2 is installed alone, as shown in FIG. 8A, both ends of the lower side portions of the both side walls of the barrier main body 2 are connected to a pair of support members 31 and 32, respectively. Two pairs of support members 31 and 32 are attached to the lower sides of both side walls of the barrier body 2 so as to be inserted between the rising pieces 31b and 32b. Even in this state, the barrier body 2 can form a barrier if it is arranged side by side as shown in FIG.

  Alternatively, when the arrangement space is more limited, as shown by arrows in FIG. 8 (A), the both side walls of the barrier body 2 are bent so that the lower ends approach each other, and each pair of support members 31, By fitting the other convex portion 32c into one concave portion 31c of 32, the pair of support members 31, 32 are coupled as shown in FIG. Thereby, since the width | variety of the base part of the barrier main body 2 is narrowed, the some barrier main body 2 can be arrange | positioned in the limited space.

  Although the illustrated embodiment has been described above, the present invention is not limited to this. For example, the constituent members of the barrier are not limited to the illustrated shapes, and may be formed in shapes that can be connected to each other. Further, the vertical cross section of each component member is not limited to the trapezoid as shown in the figure, and may be an isosceles triangle.

  The flame-retardant material forming the constituent member is not limited to a resin such as foamed polypropylene or a non-metallic material, but may be a metal material such as a lightweight alloy.

  DESCRIPTION OF SYMBOLS 1 ... Barrier, 2 ... Barrier body, 3 ... Connection member, 4 ... Corner member, 5 ... Termination member, 11 ... Convex part, 12 ... Concave part, 13 ... -Hole, 21 ... overhang | projection part, 22, 23 ... corner | angular part, 31, 32 ... support member.

Claims (3)

A barrier installed at the boundary of the controlled area,
A plurality of barrier bodies formed in a flame-retardant material and having a long horizontal cross section in an isosceles triangle or a trapezoidal hollow structure similar to this is opened. Connected via a connecting member formed in a similar shape to the barrier body ,
The barrier body has a convex portion at both ends of the lower side of the side walls, the connecting member is in position on the bottom surface adjacent to the lower side of the side walls, said convex portion is perforated holes to be fitted Characteristic barrier. 2. The barrier according to claim 1 , wherein a corner member having a hollow structure in which both ends of a corner portion are open and a longitudinal section is formed in the same shape as the barrier body is configured to be connectable to the barrier body via the connecting member. barrier, characterized in that that. The barrier member according to claim 1 or 2, wherein the barrier body located at both ends of the barrier body can be connected to a termination member having one end in the lateral direction opened and the other end closed, and a longitudinal section similar to the shape of the barrier body. A barrier characterized by being constructed.