Door structure

Abstract

To provide a door structure which can facilitate the delivery work upon door structure exchange in an existing facility and therefore can reduce the number of installation steps and costs.SOLUTION: A radiation-shielding door 1 with a function of shielding radiation is configured to include a door body 2, a door frame containing a first member F1 and a second member F2, a first hinge 3, and a second hinge 4, the door frame being formed by combining the first member F1 and the second member F2 in a joint manner in the thickness direction (front-to-back direction) of the door body 2.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This disclosure relates to a door structure.

Background Art

[0002] Conventionally, a door structure having a special door has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the door structure described in Patent Document 1, since the configurations of the door body and the frame body are large-scale, it may be difficult to carry out the carrying-in work when replacing the door structure in an existing facility. Therefore, an object of the present disclosure is to solve the above problems.

Means for Solving the Problems

[0005] The door structure according to the first aspect of the present invention includes a door body configured as a special door and a door frame that supports the door body, and the door frame is configured by combining and joining a plurality of members in the thickness direction of the door body.

[0006] According to the door structure according to the first aspect, by adopting a structure in which the door frame is divided in the front-rear direction, it becomes easy to carry it into an existing facility.

[0007] Further, the door structure according to the second aspect is the door structure according to the first aspect, and the plurality of members are made of a material capable of shielding radiation.

[0008] According to the door structure according to the second aspect, the door frame can have a radiation shielding function.

[0009] In the door structure according to the second aspect, the materials for the multiple components that make up the door frame may be iron, lead, tungsten, polyethylene, or the like.

[0010] A door structure according to a third aspect is the door structure according to the second aspect, wherein the joints between the plurality of members are formed so as not to pass straight through in a thickness direction of the door body.

[0011] According to the door structure according to the third aspect, it is possible to ensure the radiation shielding function.

[0012] A door structure according to a fourth aspect is the door structure according to the second aspect, wherein the plurality of members includes a first member having a U-shape in front view and supporting the door body, and a second member having a U-shape in front view and positioned rearward of the first member.

[0013] According to the door structure pertaining to the fourth aspect, the door frame can be formed with a simple structure.

[0014] A door structure according to a fifth aspect is the door structure according to the fourth aspect, wherein the first member has a first flange portion, the second member has a second flange portion, and the first flange portion and the second flange portion are connected to join the first member and the second member.

[0015] According to the door structure pertaining to the fifth aspect, the first member and the second member can be joined with a simple configuration.

[0016] A door structure according to a sixth aspect is the door structure according to any one of the first aspect to the fifth aspect, wherein the door frame has a hinge that supports the door body so as to be openable and closable.

[0017] According to the door structure pertaining to the sixth aspect, the door structure can be formed as a hinged door.

[0018] Further, the door structure according to the seventh aspect is the door structure according to the first aspect, wherein the door frame includes a first frame member and a second frame member that are combined in the thickness direction of the door body, and the first frame member and the second frame member are joined via a connecting member.

[0019] According to the door structure according to the seventh aspect, the first frame member and the second frame member constituting the door frame can be joined with a simple configuration.

[0020] Further, the door structure according to the eighth aspect is the door structure according to the seventh aspect, wherein a first protrusion and a second protrusion are formed on the connecting member, a first insertion portion is formed on the first frame member, a second insertion portion is formed on the second frame member, the first protrusion is inserted into the first insertion portion, and the second protrusion is inserted into the second insertion portion, whereby the first frame member and the second frame member are joined.

[0021] According to the door structure according to the eighth aspect, the first frame member and the second frame member can be joined by inserting the connecting member into the first frame member and the second frame member.

[0022] Further, the door structure according to the ninth aspect is the door structure according to the seventh aspect, wherein one end of the connecting member and the first frame member are fastened by a first fastening member, and the other end of the connecting member and the second frame member are fastened by a second fastening member, whereby the first frame member and the second frame member are joined.

[0023] According to the door structure according to the ninth aspect, the first frame member and the second frame member can be joined by fastening the connecting member to the first frame member and the second frame member.

[0024] Further, the door structure according to the tenth aspect is the door structure according to the seventh aspect, wherein a first frame flange is formed on the first frame member, a second frame flange is formed on the second frame member, and the first frame member and the second frame member are joined by connecting the connecting member through the first frame flange and the second frame flange.

[0025] According to the door structure according to the above-described tenth aspect, the first frame member and the second frame member can be joined by passing a connecting member through the first frame flange of the first frame member and the second frame flange of the second frame member.

[0026] Further, the door structure according to the eleventh aspect is the door structure according to the above-described seventh aspect, in which a first frame flange is formed on the first frame member, a second frame flange is formed on the second frame member, and the first frame flange and the second frame flange are sandwiched by the connecting member and then joined, whereby the first frame member and the second frame member are joined.

[0027] According to the door structure according to the above-described eleventh aspect, the first frame member and the second frame member can be joined by sandwiching the first frame flange of the first frame member and the second frame flange of the second frame member with the connecting member.

[0028] Further, the door structure according to the twelfth aspect is the door structure according to any one of the seventh aspect to the eleventh aspect, in which a rib protruding in one direction in the thickness direction of the second frame member is formed on the inner peripheral surface of the second frame member, and the first frame member and the second frame member are joined in a state where the rib is inserted along the inner peripheral surface of the first frame member.

[0029] According to the door structure according to the above-described twelfth aspect, the positioning between the first frame member and the second frame member can be easily performed.

[0030] Note that the contents of the second aspect to the twelfth aspect are not necessarily essential configurations in the door structure according to the present invention, and can be appropriately omitted / changed.

Effects of the Invention

[0031] According to the door structure according to the present invention as described above, welding work and the man-hours associated therewith can be reduced, and by adopting a split structure, it becomes easy to carry into existing facilities.

Brief Description of the Drawings

[0032]

Figure 1

Figure 2

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Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0033] Hereinafter, with reference to FIGS. 1 to 6, a radiation shielding door 1 which is a first embodiment of the door structure according to the present invention will be described. As shown in FIGS. 1 and 2, the radiation shielding door 1 is a large door structure that can open and close an opening in a concrete wall body 10 in a building in a large-scale facility such as a nuclear power plant. In the present embodiment, the front side (lower side in FIG. 2) of the radiation shielding door 1 shown in FIG. 1 will be described as the front of the radiation shielding door 1.

[0034] As shown in FIGS. 1 and 2, the radiation shielding door 1 according to the present embodiment includes a door body 2, a door frame including a first member F1 and a second member F2, a first hinge 3, and a second hinge 4. A handle 2a is provided at the end of the door body 2 on the leading edge side.

[0035] The door body 2 constituting the radiation shielding door 1 according to this embodiment and the door frame supporting the door body 2 are made of a material capable of shielding radiation (for example, iron, lead, tungsten, polyethylene, etc.). Thereby, the door body 2 and the door frame of the radiation shielding door 1 can have a radiation shielding function.

[0036] The first hinge 3 and the second hinge 4 support the door body 2 so as to be openable and closable by rotating the door body 2 with respect to the first member F1 in the door frame. Specifically, the first hinge 3 rotatably supports the lower part of the door end side of the door body 2, and the second hinge 4 rotatably supports the upper part of the door end side of the door body 2 with respect to the hinge support plate 11 constituting the first member F1. That is, the radiation shielding door 1 is configured as a hinged door.

[0037] In the radiation shielding door 1 according to this embodiment, as shown in FIG. 2, the door frame is configured by combining and joining two members, that is, the first member F1 and the second member F2 located behind the first member F1, in the thickness direction (front-rear direction) of the door body 2.

[0038] Specifically, as shown in FIG. 3, the first member F1 is formed in a square shape in a front view. The first member F1 is assembled by welding the hinge support plate 11, the first vertical frame member 12, the first upper frame member 13, the first lower frame member 14, the second vertical frame member 15, the third vertical frame member 16, the fourth vertical frame member 17, the fifth vertical frame member 18, the sixth vertical frame member 19, the second upper frame member 20, the second lower frame member 21, the third upper frame member 22, and the third lower frame member 23 to each other.

[0039] In this embodiment, the first vertical frame member 12, the first upper frame member 13, the first lower frame member 14, and the second vertical frame member 15 are arranged on the front side and assembled in a square shape. Further, the third vertical frame member 16, the fourth vertical frame member 17, the second upper frame member 20, and the second lower frame member 21 are arranged in the middle part in the front-rear direction and assembled in a square shape. Furthermore, the fifth vertical frame member 18, the sixth vertical frame member 19, the third upper frame member 22, and the third lower frame member 23 are arranged on the rear side and assembled in a square shape. As shown in FIG. 2, the first member F1 is formed such that the opening on the front side is large and the opening becomes smaller toward the rear side.

[0040] On the outer peripheral surfaces of the first vertical frame member 12, the first upper frame member 13, the first lower frame member 14, and the second vertical frame member 15, which are located on the front side in the first member F1, a number of first embedded bolts 24·24··· extending outward are fixed. Also, at the rear ends of the fifth vertical frame member 18, the sixth vertical frame member 19, the third upper frame member 22, and the third lower frame member 23, which are located on the rear side in the first member F1, a number of first outer flanges 25·25··· are fixed toward the outer surface side, and a number of first inner flanges 26·26··· are fixed toward the inner surface side.

[0041] Also, as shown in FIG. 4, the second member F2 is also formed in an L-shaped configuration when viewed from the front. The second member F2 is assembled into an L-shaped configuration by welding the seventh vertical frame member 31, the eighth vertical frame member 32, the fourth upper frame member 33, and the fourth lower frame member 34 to each other. As shown in FIGS. 2 and 4, the shape of the front end portion of the second member F2 is formed to match the shape of the rear end portion of the first member F1.

[0042] At the front end portion of the second member F2, a number of second outer flanges 35·35··· are fixed toward the outer surface side, and a number of second inner flanges 36·36··· are fixed toward the inner surface side. Also, on the outer peripheral surface of the second member F2, a number of second embedded bolts 37·37··· extending outward are fixed.

[0043] When joining the first member F1 and the second member F2, as shown in FIG. 4, the first member F1 and the second member F2 are arranged on the gantry B, and the front end face of the second member F2 is brought into contact with the rear end face of the first member F1. Then, the first outer flanges 25·25··· and the second outer flanges 35·35··· are connected by bolts and nuts. Further, the first inner flanges 26·26··· and the second inner flanges 36·36··· are connected by bolts and nuts.

[0044] As shown in FIG. 2, in the state where the first member F1 and the second member F2 are joined, the joint between the first member F1 and the second member F2 is formed so as not to linearly penetrate in the thickness direction of the door body 2. Thereby, the radiation shielding function in the radiation shielding door 1 can be ensured.

[0045] When forming the wall body 10 by placing concrete around the door frame where the first member F1 and the second member F2 are joined, as shown in FIG. 5, a formwork is formed around the door frame using the plate material P, and reinforcing bars are arranged. Further, a support frame FF is assembled so as to abut against the inner peripheral surface of the door frame. In this state, concrete is poured around the door frame.

[0046] When placing concrete around the door frame, the first embedded bolts 24·24···, the second embedded bolts 37·37··· that extend outward from the door frame, the first outer flanges 25·25··· and the second outer flanges 35·35··· that are connected to each other are embedded in the concrete. On the other hand, the first inner flanges 26·26··· and the second inner flanges 36·36··· are removed after the concrete hardens and exhibits a predetermined strength and the wall body 10 is formed (see FIG. 6). Also, at this time, the support frame FF is also removed.

[0047] After installing the door frame on the wall body 10, the door body 2 is assembled to the door frame via the first hinge 3 and the second hinge 4. Thereby, the radiation shielding door 1 having a radiation shielding function is installed so as to be openable and closable as an opening door.

[0048] As described above, in the radiation shielding door 1 according to the present embodiment, the door frame is formed by combining and joining a plurality of members, the first member F1 and the second member F2, in the thickness direction of the door body 2. In this way, by adopting a structure in which the door frame is divided in the front-rear direction, the carrying-in work can be performed for each of the first member F1 and the second member F2, so that the carrying-in work of the door frame into the existing facility can be easily performed.

[0049] Further, compared with a configuration in which the door frame is integrally formed, the convenience of carrying-in during transportation and the like is improved, so that the man-hours at the time of installation can be reduced and the cost can be reduced. Also, even when there are restrictions on carrying-in due to restrictions such as floor load-bearing capacity and passage width, carrying-in and construction are possible by dividing the door frame. In addition, the area where construction (carrying-in) into the existing building is possible can be expanded.

[0050] In addition, since each of the first member F1 and the second member F2 can reduce the weight as compared with a door frame integrally formed, the safety during the carrying-in work in an existing building can be improved. Further, since the first member F1 and the second member F2 can be lifted without being limited to a large crane, the cost at the time of installation can be reduced. Further, since the rotation range of the crane is widened, the workability is improved. Further, since the handling at the time of installation is simplified, the quality of the radiation shielding door 1 can be improved.

[0051] Further, the door frame in the radiation shielding door 1 according to the present embodiment includes a first member F1 that has an L-shaped appearance in a front view and supports the door body 2, and a second member F2 that has an L-shaped appearance in a front view and is located behind the first member F1. Thereby, a door frame can be formed with a simple configuration.

[0052] Further, in the radiation shielding door 1 according to the present embodiment, the first member F1 has a first flange portion (a first outer flange 25 and a first inner flange 26), and the second member F2 has a second flange portion (a second outer flange 35 and a second inner flange 36). Then, the first member F1 and the second member F2 are joined by connecting the first flange portion and the second flange portion. Thus, according to the radiation shielding door 1 according to the present embodiment, the first member F1 and the second member F2 are joined with a simple configuration.

[0053] Next, with reference to FIGS. 7 to 12, a door structure 101 according to a second embodiment of the present invention will be described. As shown in FIGS. 7 and 8, the door structure 101 can open and close an opening of a concrete wall body 110 in a building. In the present embodiment, the front side of the paper surface of the door structure 101 shown in FIG. 7 (the lower side in FIG. 8) will be described as the front of the door structure 101. It should be noted that it is also possible to adopt a configuration in which mortar is filled between the concrete constituting the wall body 110 and the door frame.

[0054] As shown in FIGS. 7 and 8, the door structure 101 according to the present embodiment includes a door body 102 configured as a special door such as a radiation shielding door, a countermeasure door against heavy object collision, a watertight door, etc., a door frame that supports the door body 102, a first hinge 103, a second hinge 104, and the like. A handle 2a is provided at the end of the door body 102 on the leading edge side.

[0055] The first hinge 103 and the second hinge 104 support the door body 102 so as to be openable and closable by rotating the door body 102 with respect to the door frame. Specifically, the first hinge 103 rotatably supports the lower part of the trailing edge side of the door body 102, and the second hinge 104 rotatably supports the upper part of the trailing edge side of the door body 102 with respect to the hinge support plate 111. That is, the door structure 101 is configured as an outward-opening door.

[0056] In the door structure 101 according to the present embodiment, as shown in FIGS. 8 and 9, the door frame is formed by combining three members, namely, a first frame member F11, a second frame member F12, and a third frame member F13, in the thickness direction (front-rear direction) of the door body 102 and joining them. A hinge support plate 111, a first vertical frame member 112, a first upper frame member 113, and a first lower frame member 114 are provided at the front end of the third frame member F13.

[0057] As shown in FIG. 9, the first frame member F11 to the third frame member F13 are formed in an inverted L shape when viewed from the front. Specifically, the first frame member F11 is formed in a rectangular shape by combining a first upper frame plate 41, a first lower frame plate 42, a first right frame plate 43, and a first left frame plate 44. Similarly, the second frame member F12 is combined with a second upper frame plate 51, a second lower frame plate 52, a second right frame plate 53, and a second left frame plate 54. Further, the third frame member F13 is combined with a third upper frame plate 61, a third lower frame plate 62, a third right frame plate 63, and a third left frame plate 64.

[0058] As shown in Fig. 9, a number of first bolts 46 protruding outward in the vertical and horizontal directions are provided on the first frame member F11. Similarly, a number of third bolts 66 protruding outward in the vertical and horizontal directions are provided on the third frame member F13. The first bolts 46 and the third bolts 66 function as anchor bolts driven into the wall body 110 to fix the door frame. It is also possible to provide an anchor bolt on the second frame member F12.

[0059] As shown in Fig. 9, a number of first ribs 48 are erected along the front-rear direction on the inner surface of the first frame member F11. Similarly, a number of second ribs 58 are erected along the front-rear direction on the inner surface of the second frame member F12, and a number of third ribs 68 are erected along the front-rear direction on the inner surface of the third frame member F13. The first, second, and third ribs 48, 58, and 68 enhance the strength of the first frame member F11, the second frame member F12, and the third frame member F13.

[0060] As shown in Figs. 9 and 10, in each of the second upper frame plate 51, the second lower frame plate 52, the second right frame plate 53, and the second left frame plate 54, a part of the second rib 58 is formed to protrude rearward. Then, with the second rib 58 inserted along the inner peripheral surface of the first frame member F11, the first frame member F11 and the second frame member F12 are joined. This enables easy positioning of the first frame member F11 and the second frame member F12 in the door structure 101.

[0061] Similarly, in each of the third upper frame plate 61, the third lower frame plate 62, the third right frame plate 63, and the third left frame plate 64, a part of the third rib 68 is formed to protrude rearward. Then, with the third rib 68 inserted along the inner peripheral surface of the second frame member F12, the second frame member F12 and the third frame member F13 are joined. This enables easy positioning of the second frame member F12 and the third frame member F13 in the door structure 101.

[0062] As shown in Fig. 10, a first groove portion 45 is formed as a first insertion portion on the front side of the inner surface of the first frame member F11. The first groove portion 45 is closed by a first closing plate 49 from the outer surface of the first frame member F11.

[0063] On the rear side of the inner surface of the second frame member F12, a second rear groove portion 55 is formed as a second insertion portion. Further, on the front side of the inner surface of the second frame member F12, a second front groove portion 56 is formed. The second rear groove portion 55 and the second front groove portion 56 are closed by a second closing plate 59 from the outer surface of the second frame member F12.

[0064] On the rear side of the inner surface of the third frame member F13, a groove portion is formed as an insertion portion. This groove portion is closed by a third closing plate 69 from the outer surface of the third frame member F13.

[0065] Also, as shown in FIG. 10, a first flange 47 is provided on the front side of the inner surface of the first frame member F11. Further, a second flange 57 is provided on the rear side of the inner surface of the second frame member F12. When joining the first frame member F11 and the second frame member F12, the first flange 47 and the second flange 57 are bolted together to temporarily fix the first frame member F11 and the second frame member F12. Similarly, the second frame member F12 and the third frame member F13 are also temporarily fixed via flanges (not shown).

[0066] As described above, in the door structure 101 according to the present embodiment, the door frame is formed by combining and joining a plurality of members, namely, the first frame member F11, the second frame member F12, and the third frame member F13, in the thickness direction of the door body 102. In this way, by adopting a structure in which the door frame is divided in the front-rear direction, the carrying-in operation can be performed for each of the first frame member F11 to the third frame member F13, so that it is possible to easily perform the carrying-in operation of the door frame to the existing facilities.

[0067] Also, compared with a configuration in which the door frame is integrally formed, the convenience of carrying-in during transportation and the like is improved, so that the man-hours at the time of installation can be reduced and the cost can be reduced. Also, even when there are restrictions on carrying-in due to limitations such as floor load-bearing capacity and passage width, carrying-in and construction are possible by dividing the door frame. Also, the area where construction (carrying-in) is possible to the existing building can be expanded.

[0068] In addition, each of the first frame member F11 to the third frame member F13 can reduce the weight compared to the integrally formed door frame, so the safety during the carrying-in operation in the existing building can be improved. Also, since the first frame member F11 to the third frame member F13 can be lifted not only by a large crane, the installation cost can be reduced. Further, the workability is improved by expanding the rotation range of the crane. Also, since the handling during installation becomes simple, the quality of the door structure 101 can be improved.

[0069] In the door structure 101 according to the present embodiment, the first frame member F11 and the second frame member F12 are joined via a connecting member 71. As shown in FIGS. 8 and 11, the connecting member 71 is formed in a U shape with a first protrusion 71a and a second protrusion 71b formed thereon. Then, the first protrusion 71a is inserted into the first groove portion 45 of the first frame member F11, and the second protrusion 71b is inserted into the second rear groove portion 55 of the second frame member F12, whereby the first frame member F11 and the second frame member F12 are joined. Thereafter, the connecting member 71 is fixed to the first frame member F11 and the second frame member F12 by fixing bolts.

[0070] As described above, according to the door structure 101 of the present embodiment, the first frame member F11 and the second frame member F12 constituting the door frame can be joined with a simple configuration. Specifically, the first frame member F11 and the second frame member F12 can be joined by inserting the first protrusion 71a and the second protrusion 71b of the connecting member 71 into the first groove portion 45 and the second rear groove portion 55, respectively.

[0071] According to the door structure 101 of the present embodiment, the second frame member F12 and the third frame member F13 constituting the door frame are also joined via a connecting member 72 having the same shape as the connecting member 71. Specifically, the second frame member F12 and the third frame member F13 can be joined by inserting the two protrusions of the connecting member 72 into the second front groove portion 56 and the groove portion of the third frame member F13, respectively.

[0072] In the door structure according to the present invention, the first frame member F11 and the second frame member F12 (the same applies to the second frame member F12 and the third frame member F13) can also be joined via a connecting member formed by other configurations.

[0073] For example, as shown in Fig. 12(a), one end of the connecting member 81 and the first lower frame plate 42 of the first frame member F11 (the same applies to the first upper frame plate 41, the first right frame plate 43, and the first left frame plate 44, the same hereinafter) are fastened by a first connecting bolt 82a which is a first fastening member. Then, the other end of the connecting member 81 and the second lower frame plate 52 of the second frame member F12 (the same applies to the second upper frame plate 51, the second right frame plate 53, and the second left frame plate 54, the same hereinafter) are fastened by a second connecting bolt 82b which is a second fastening member. Thereby, the first frame member F11 and the second frame member F12 are joined via the connecting member 81.

[0074] Also, as shown in Fig. 12(b), a first frame flange 42a is formed on the first lower frame plate 42 of the first frame member F11, and a second frame flange 52a is formed on the second lower frame plate 52 of the second frame member F12. Then, with the connecting bolt 83 which is a connecting member penetrating through the first frame flange 42a and the second frame flange 52a, a connecting nut 84 is screwed and joined. Thereby, the first frame member F11 and the second frame member F12 are joined via the connecting bolt 83 and the connecting nut 84.

[0075] Also, as shown in Fig. 12(c), it is also possible to join in a state where the first frame flange 42a and the second frame flange 52a are sandwiched by the connecting member 85. The connecting member 85 may be bolted to the first frame flange 42a and the second frame flange 52a. Thereby, the first frame member F11 and the second frame member F12 are joined via the connecting member 85.

[0076] [Modification Example] The above-described embodiment can be appropriately modified as shown in the following modification examples. Note that each modification example may be applied in combination with other modification examples as long as no contradiction occurs.

[0077] In the door structure according to the present invention, if the door frame is divided in the front-rear direction, three or more members may be combined and joined in the thickness direction. Further, in addition to the square shape in the front view, it is also possible to configure the door frame by combining U-shaped members or combining rod-shaped members.

[0078] Also, when joining a plurality of members, it is possible to adopt a configuration without using a flange. For example, it is also possible to adopt welding, adhesion by an adhesive, a connection configuration via other connecting members, etc. Further, the door structure can be configured as a sliding door instead of a hinged door. Also, even when the door structure is a hinged door, the number and arrangement positions of the hinges are not limited to the present embodiment, and it is also possible to adopt a configuration in which three or more hinges are provided.

Explanation of Reference Numerals

[0079] 1 Radiation shielding door (door structure) 2 Door body 2a Handle 3 First hinge 4 Second hinge 10 Wall body 11 Hinge support plate 12 First vertical frame member 13 First upper frame member 14 First lower frame member 15 Second vertical frame member 16 Third vertical frame member 17 Fourth vertical frame member 18 Fifth vertical frame member 19 Sixth vertical frame member 20 Second upper frame member 21 Second lower frame member 22 Third upper frame member 23 Third lower frame member 24 First embedded bolt 25 First outer flange 26 First inner flange 31 Seventh vertical frame member 32 Eighth vertical frame member 33 Fourth upper frame member 34 Fourth lower frame member 35 Second outer flange 36 Second inner flange 37 Second embedded bolt 41 First upper frame plate 42 First lower frame plate 42a First frame flange 43 First left frame plate 44 First right frame plate 45 First groove 46 First bolt 47 First flange 48 First rib 49 First closing plate 51 Second upper frame plate 52 Second lower frame plate 52a Second frame flange 53 Second left frame plate 54 Second right frame plate 55 Second rear groove 56 Second front groove 57 Second flange 58 Second rib 59 Second closing plate 61 Third upper frame plate 62 Third lower frame plate 63 Third left frame plate 64 Third right frame plate 68 Third rib 69 Third closing plate 71 Connecting member 71a First protrusion 71b Second protrusion 72 Connecting member 81 Connecting member 82a First connecting bolt 82b Second connecting bolt 83 Connecting bolt 84 Connecting nut 85 Connecting member 101 Door structure 102 Door body 102a Handle 103 First hinge 104 Second hinge 110 Wall body 111 Hinge support plate 112 First vertical frame member 113 First upper frame member 114 First lower frame member F1 First member F2 Second member F11 First frame member F12 Second frame member F13 Third frame member B Stand FF Support frame P Plate material

Claims

1. A door structure comprising a door body configured as a special door, and a door frame for supporting the door body, wherein the door frame is formed by combining and joining a plurality of members in the thickness direction of the door body.

2. The door structure according to claim 1, wherein the plurality of members are made of a material capable of shielding radiation.

3. The door structure according to claim 2, wherein the joints between the plurality of members are formed so as not to linearly penetrate in the thickness direction of the door body.

4. The door structure according to claim 2, wherein the plurality of members include a first member having a square shape in a front view and supporting the door body, and a second member having a square shape in a front view and located behind the first member.

5. The first member has a first flange portion, the second member has a second flange portion, and the first member and the second member are joined by connecting the first flange portion and the second flange portion. The door structure according to claim 4.

6. The door structure according to any one of claims 1 to 5, wherein the door frame has a hinge for supporting the door body to be openable and closable.

7. The door frame includes a first frame member and a second frame member combined in the thickness direction of the door body, and the first frame member and the second frame member are joined via a connecting member. The door structure according to claim 1.

8. A first protrusion and a second protrusion are formed on the connecting member, a first insertion portion is formed on the first frame member, a second insertion portion is formed on the second frame member, and the first frame member and the second frame member are joined by inserting the first protrusion into the first insertion portion and the second protrusion into the second insertion portion. The door structure according to claim 7.

9. One end of the connecting member and the first frame member are fastened by a first fastening member, and the other end of the connecting member and the second frame member are fastened by a second fastening member, whereby the first frame member and the second frame member are joined. The door structure according to claim 7.

10. A first frame flange is formed on the first frame member, a second frame flange is formed on the second frame member, and the first frame member and the second frame member are joined by connecting them in a state where the connecting member penetrates through the first frame flange and the second frame flange. The door structure according to claim 7.

11. A first frame flange is formed on the first frame member, a second frame flange is formed on the second frame member, The door structure according to claim 7, wherein the first frame member and the second frame member are joined by sandwiching and joining the first frame flange and the second frame flange with the connecting member.

12. On the inner peripheral surface of the second frame member, ribs protruding in one direction in the thickness direction of the second frame member are formed. The door structure according to any one of claims 7 to 11, wherein the first frame member and the second frame member are joined in a state where the rib is inserted along the inner peripheral surface of the first frame member.

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