JP3000620U - Movable door - Google Patents

Abstract

(57) [Abstract] [Purpose] A movable door that is excellent in design, with no gaps between doors, and less likely to cause warping or twisting of the door, and a door that can be opened and closed smoothly. provide. A frame 4 provided with an outer arc wall 24 whose outer surface 22 forms a part of a circle centered on the intersection of the front wall 16 and the side wall 20 or the intersection of the rear wall 18 and the side wall 20. A hinge body 6, a round bar body 8 and a plurality of door bodies 10, the frame body 4 is attached to the door body 10, and the hinge body 6 is attached to the outer arc wall 24 of the frame body 4 by the cylindrical portion 36. Hinges 6 connected to the outer surface of the outer circular arc wall 24 in a state of being in contact with each other and arranged on the sides of the two door bodies 10 adjacent to each other.
A movable door in which a plurality of door bodies 10 are foldably connected to each other by inserting the round rods 8 into the cylindrical portions 36 coaxially.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foldable movable door used for movable partitions, folding doors and the like.

[0002]

[Prior art]

 In recent years, a movable partition with multiple doors that can be folded is connected between the living room and the dining room of the living / dining room, and the movable partition is closed as necessary to prevent the dining room from being seen from the living room. Is being done. In addition, the opening of the closet is closed by a folding door that connects multiple doors in a foldable manner. Such foldable movable doors such as movable partitions and folding doors are usually constructed by connecting a plurality of rectangular plate-shaped doors with metal hinges.

[0003]

[Problems to be solved by the device]

 However, in the conventional movable door, when connecting doors with hinges, hinges are attached to the top and bottom of the door in two or three places, so when the door is opened or when the door is opened halfway, There was a gap with the door, which was inferior in design, and the rear side of the door was visible from the gap, which sometimes gave it a bad appearance. Also, with conventional movable doors, the doors may not be able to open and close smoothly due to warping and twisting due to the effects of temperature and humidity.

The present invention has been made in view of the above circumstances, and is excellent in design as well as having no gap between doors, and less likely to cause warping or twisting of the doors. The purpose is to provide a new movable door that can be opened and closed smoothly.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides the following movable doors (1) to (4).

(1) The front wall portion, the rear wall portion, the side wall portion, and the front wall portion and the side wall portion are provided between the front wall portion and the side wall portion, or between the rear wall portion and the side wall portion. Part of the outer arc wall that forms part of a circle centered on the intersection of the parts or the intersection of the rear wall and the side wall, and between the front wall and the side wall or the rear wall inside the outer arc wall. An inner arc wall that is spaced apart from the outer arc wall between the side wall, a front wall protrusion that protrudes along the vertical direction on the inner surface of the front wall, and a vertical direction on the inner surface of the rear wall. And a rear wall protrusion that is provided along with the rear wall protrusion, and a square groove that opens to the outer surface is formed in the central portion of the outer arc wall along the radial direction of the circle and in the vertical direction. A frame having a substantially U-shaped cross section, which is formed in a central part of the outer arc wall along a vertical direction and has a triangular groove communicating with the groove and opening on the inner surface of the rectangular groove. ,

The plane cross section is a circle centered on the intersection of the front wall and side wall of the frame or the intersection of the rear wall and side wall of the frame, and is arranged in contact with the outer surface of the outer arc wall. A cylindrical portion, a square portion that is inserted into the square groove of the frame, and a triangular portion that is inserted into the triangular groove of the frame and has a tip in contact with the inner arc wall are continuously provided, and a slit is formed in the cylindrical portion. And a hinge body formed along the upward and downward directions,

A round rod body having an outer diameter substantially the same as the inner diameter of the cylindrical portion of the hinge body and inserted into the cylindrical portion;

A plurality of rectangular plate-shaped door bodies, each of which has a front surface groove portion on a front surface into which a front wall projection of the frame is inserted, and a rear surface groove portion on a rear surface of which the rear wall projection of the frame is inserted. Equipped with

The side portion of the door body is attached between the front wall portion and the rear wall portion of the frame body with the front wall protrusion and the rear wall protrusion of the frame body inserted in the front surface groove portion and the rear surface groove portion of the door body, The hinge body is connected to the frame body with the square part and the triangular part of the hinge body inserted in the square groove and the triangular groove of the frame body, and the hinge body is arranged on the side part of both door bodies adjacent to each other. A movable door characterized in that a plurality of door main bodies are foldably connected to each other by inserting the round bar into these cylindrical portions.

(2) The front wall portion, the rear wall portion, the side wall portion, the front wall portion and the side wall portion, or between the rear wall portion and the side wall portion, the outer surface is the front wall portion and the side wall portion. Part of the circle centering on the intersection of the parts or the intersection of the rear wall and the side wall, and between the front wall and the side wall or the rear wall inside the outer arc wall. An inner arc wall that is spaced apart from the outer arc wall between the side wall, a front wall protrusion that protrudes along the vertical direction on the inner surface of the front wall, and a vertical direction on the inner surface of the rear wall. And a rear wall projection that is provided along with the rear wall projection, and a square groove that opens to the outer surface is formed in the central portion of the outer arc wall along the radial direction of the circle and in the vertical direction. A frame having an approximately U-shaped cross section, which is formed in an arc groove having a diameter larger than that of the square groove communicating with the groove and opening on the inner surface, in the central portion of the outer arc wall along the vertical direction. ,

[0012] A plane cross section has a circular shape centering on the intersection of the front wall portion and the side wall portion of the frame or the intersection of the rear wall portion and the side wall portion, and is arranged in contact with the outer surface of the outer arc wall. A cylindrical portion, a square portion that is inserted into a square groove of the frame body, and a circular portion that is inserted into an arc groove of the frame body and has a tip contacting the inner arc wall are continuously provided, and a slit is formed in the cylindrical portion. And a hinge body formed along the upward and downward directions,

A round rod body having an outer diameter substantially the same as the inner diameter of the cylindrical portion of the hinge body and inserted into the cylindrical portion;

A plurality of rectangular plate-shaped door bodies, each of which has a front groove portion formed on a front surface thereof, into which a front wall projection of the frame body is inserted, and a rear groove portion formed on a rear surface thereof, into which a rear wall projection of the frame body is inserted. Equipped with

The side portion of the door body is attached between the front wall portion and the rear wall portion of the frame body with the front wall protrusion and the rear wall protrusion of the frame body inserted in the front surface groove portion and the rear surface groove portion of the door body, The hinge body is connected to the frame body with the square portion and the circular portion of the hinge body inserted in the square groove and the circular arc groove of the frame body, and the hinge body is arranged on the side portion of both door bodies adjacent to each other. A movable door characterized in that a plurality of door main bodies are foldably connected to each other by inserting the round bar into these cylindrical portions.

(3) The front wall portion, the rear wall portion, the side wall portion, and the front wall portion and the side wall portion are provided between the front wall portion and the side wall portion, or between the rear wall portion and the side wall portion. Part of the circle centering on the intersection of the parts or the intersection of the rear wall and the side wall, and between the front wall and the side wall or the rear wall inside the outer arc wall. An inner arc wall that is spaced apart from the outer arc wall between the side wall, a front wall protrusion that protrudes along the vertical direction on the inner surface of the front wall, and a vertical direction on the inner surface of the rear wall. And a rear wall projection that is provided along with the rear wall projection, and a square groove that opens to the outer surface is formed in the central portion of the outer arc wall along the radial direction of the circle and in the vertical direction. A frame having a substantially U-shaped cross section, which is formed in a central portion of the outer arc wall along the vertical direction and has a large diameter groove which communicates with the groove and opens on the inner surface. ,

A planar cross section is formed in a circular shape centering on the intersection of the front wall portion and the side wall portion of the frame or the intersection of the rear wall portion and the side wall portion, and is arranged in contact with the outer surface of the outer arc wall. A cylindrical portion, a square portion that is inserted into a square groove of the frame body, and a large diameter portion that is inserted into a large-diameter groove of the frame body and has a tip contacting the inner arc wall, are continuously provided, and the cylindrical portion A hinge body having slits formed along the upper and lower sides,

A round rod body having an outer diameter substantially the same as the inner diameter of the cylindrical portion of the hinge body and inserted into the cylindrical portion;

A plurality of rectangular plate-shaped door bodies, each of which has a front surface groove portion into which a front wall projection of the frame is inserted and a rear surface groove portion into which a rear wall projection of the frame is inserted into a rear surface. Equipped with

The side portion of the door body is attached between the front wall portion and the rear wall portion of the frame body with the front wall protrusion and the rear wall protrusion of the frame body inserted in the front surface groove portion and the rear surface groove portion of the door body, The hinge body is connected to the frame body with the square part and the large diameter part of the hinge body inserted in the square groove and the large diameter groove of the frame body, and it is placed on the side part of both door bodies adjacent to each other. A movable door characterized in that the cylindrical portions of the hinge body are coaxially continuous, and a plurality of door bodies are foldably connected by inserting the round rod bodies into these cylindrical portions.

(4) The front wall portion, the rear wall portion, the side wall portion, and the front wall portion and the side wall portion, or between the rear wall portion and the side wall portion, the outer surface is the front wall portion and the side wall portion. Part of the circle centering on the intersection of the parts or the intersection of the rear wall and the side wall, and between the front wall and the side wall or the rear wall inside the outer arc wall. An outer circular arc wall and an inner circular arc wall spaced apart from the side wall are provided, and a square groove opening to the outer surface is formed in the central portion of the outer circular arc wall along the radial direction of the circle and in the vertical direction. A large-diameter groove, which is formed along the vertical groove and has a diameter larger than that of the square groove and which communicates with the square groove and opens to the inner surface, is formed in the central portion of the outer arc wall along the vertical direction and has a substantially U-shaped cross section. Frame-like frame,

The plane cross section has a circular shape centered on the intersection of the front wall portion and the side wall portion of the frame or the intersection of the rear wall portion and the side wall portion, and is arranged in contact with the outer surface of the outer arc wall. A hinge body in which a cylindrical portion, a square portion that is inserted into a square groove of the frame body, and a large diameter portion that is inserted into a large-diameter groove of the frame body and has a tip contacting the inner arc wall are connected. When,

A round bar body inserted into the cylindrical portion of the hinge body,

A plurality of rectangular plate-shaped door bodies,

A state in which the side portion of the door body is attached between the front wall portion and the rear wall portion of the frame body, and the square portion and the large diameter portion of the hinge body are inserted in the square groove and the large diameter groove of the frame body. The hinge body is connected to the frame body with, and the cylindrical portions of the hinge bodies arranged on the sides of the door bodies adjacent to each other are coaxially continuous, and the round bar body is inserted into these cylindrical portions. As a result, a movable door is characterized in that multiple door bodies are foldably connected.

[0026]

【Example】

 Next, the present invention will be specifically described by way of examples, but the present invention is not limited to the following examples.

Embodiment 1 FIGS. 1 and 2 show an embodiment of the movable door of the present invention. The movable door 2 of the present embodiment includes a frame body 4, a hinge body 6, a round bar body 8 and a door body 10. The frame 4, hinge body 6, and round bar body 8 can be formed of any material such as synthetic resin or metal.

In the figure, 12 is a normal frame attached to the side portion that is not involved in the connection of the door body 10, and 14 is a movable rail installation slide rail provided above and below the movable door. Although not shown, pins are fixed on the upper and lower sides of one round bar body (the right round bar body in the figure) 8, and the pins are inserted into the slide rails 14.

As shown in FIG. 3, the frame 4 has a front wall portion 16, a rear wall portion 18, and a side wall portion 20, and has a substantially U-shaped cross section. Between the front wall portion 16 and the side wall portion 20 of the frame 4, or between the rear wall portion 18 and the side wall portion 20, an outer surface 22 is an intersection of the front wall portion 16 and the side wall portion 20 or the rear wall portion 18. And an outer arc wall 24 forming a part of a circle centered on a plane intersection of the side wall portion 20 (the plane intersection in the drawing is indicated by x). Further, between the front wall portion 16 and the side wall portion 20 or between the rear wall portion 18 and the side wall portion 20, an inner circular arc wall 26 separated from the outer circular arc wall 24 is provided inside the outer circular arc wall 24. It is provided.

A front wall projection 28 is provided on the inner surface of the front wall portion 16 so as to project in the vertical direction, and a rear wall projection 30 is provided on the inner surface of the rear wall portion 18 so as to project in the vertical direction.

At the center of the outer arc wall 24, there is formed a square groove 32 having a quadrangular plane cross-section that opens to the outer surface, and is formed at the intersection of the front wall 16 and the side wall 20 or between the rear wall 18 and the side wall 20. It is formed along the radial direction y of the circle centered on the intersection point and along the vertical direction. Further, a triangular groove 34, which has a triangular cross section in a plan view and is open to the inner surface, is formed in the central portion of the outer arc wall 24 along the vertical direction. The triangular groove 34 is a large-diameter groove having a larger diameter than the square groove 32.

As shown in FIGS. 3 and 4, the hinge body 6 has a plane cross section centered on the intersection of the front wall 16 and the side wall 20 of the frame 4 or the intersection of the rear wall 18 and the side wall 20. And a cylindrical portion 36 arranged in contact with the outer surface 22 of the outer arc wall 24, a square portion 38 having a quadrangular cross section inserted into the square groove 32 of the frame 4, and a frame. A triangular portion 40, which is inserted into the triangular groove 34 of the body 4 and has a triangular cross section in plan view, the tip of which is in contact with the inner circular arc wall 26, is integrally connected. The triangular portion 40 is a large-diameter portion having a larger diameter than the square portion 38. A triangular concave portion 42 is formed in the central portion of the triangular portion 40 of the hinge body 6. In addition, a slit 44 is formed in the cylindrical portion 36 of the hinge body 6 in the vicinity of the continuous location of the square portion 38 along the vertical direction.

As shown in FIG. 5, the round rod body 8 has an outer diameter substantially the same as the inner diameter of the cylindrical portion 36 of the hinge body 6, and is inserted into the cylindrical portion 36 of the hinge body 6. A collar portion 46 for preventing the fall is formed on the portion.

The front main body of the door body 10 is formed with a front groove portion 48 into which the front wall projection 28 of the frame 4 is inserted, and the rear surface thereof is formed with a rear surface groove portion 50 into which the rear wall projection 30 of the frame 4 is inserted. It is a square plate.

In the movable door 2 of this example, the front wall portion of the frame body 4 is inserted in the front groove portion 48 and the rear surface groove portion 50 of the door body 10 with the front wall protrusion 28 and the rear wall protrusion 30 of the frame body 4 inserted. A side portion of the door body 10 is attached between the rear wall portion 16 and the rear wall portion 18.

Further, the square portion 38 and the triangular portion 40 of the hinge body 6 are inserted in the square groove 32 and the triangular groove 34 of the frame body 4, and they are present on the side portions of both door main bodies 10 and 10 which are adjacent to each other. The hinge body 6 is connected to the frame body 4 in a state where the cylindrical portions 36, 36 of the hinge body 6, 6 are coaxially continuous (see FIG. 1).

The hinge body 6 is connected to the frame body 4 by inserting the square portion 38 and the triangle portion 40 of the hinge body 6 into the square groove 32 and the triangular groove 34 from the upper end or the lower end of the frame body 4, This can be done by adhering the tip of the triangular portion 40 to the inner arc wall 26 of the frame 4.

Then, by inserting the round bar body 8 into the cylindrical portions 36, 36 of the hinge bodies 6, 6 arranged on the sides of the two door bodies 10, 10 adjacent to each other, the plurality of door bodies 10 are folded. It is connected so that it can be folded.

Embodiment 2 FIG. 6 shows a frame body and a hinge body used for the movable door of Embodiment 2. The hinge body 6 of this example is the same as the hinge body of Example 1 except that the triangular recess 40 is not provided in the triangular portion 40. Since the other points of the movable door of this embodiment are the same as those of the first embodiment, the drawings and the description thereof are omitted.

Third Embodiment FIG. 7 shows a frame body and a hinge body used for the movable door of the third embodiment. The frame 4 of this example is an arc groove having a circular arc-shaped cross section in a plan view, which is connected to the square groove 32 in the central portion of the outer arc wall 24, instead of the triangular groove of the frame of Example 1, and which is open to the inner surface. 52 is formed along the vertical direction. The circular arc groove 52 is a large diameter groove having a larger diameter than the square groove 32.

Further, the hinge body 6 of this example is inserted into the arcuate groove 52 of the frame body 4 in place of the triangular portion 40 of the hinge body of the first embodiment, and the circular portion 54 whose tip contacts the inner arcuate wall 26. Has been formed. The circular portion 54 is a large-diameter portion having a larger diameter than the square portion 38.

Since the other points of the movable door of this embodiment are the same as those of the first embodiment, the drawings and the description thereof are omitted.

[0043]

[Effect of device]

 As described above, the movable doors according to claims 1 to 3 have the following effects (a) to (d).

(A) An outer arc wall forming a part of a circle whose outer surface is centered on the intersection of the front wall portion and the side wall portion or the intersection of the rear wall portion and the side wall portion is provided on the frame, and a cylinder of a hinge body is formed. The parts are placed in contact with the outer surface of the outer arc wall, and the cylindrical parts of the hinges located on the sides of the two door bodies that are adjacent to each other are coaxially continuous, so that the doors There is no gap between them, and the cylindrical part of the hinge body does not significantly protrude from the front or rear surface of the door body, which is excellent in design.

(B) A frame having a substantially U-shaped cross section is attached to a side portion of the door body, and front wall protrusions and rear wall protrusions provided on the frame body are inserted into the front groove portion and the rear groove portion of the door body. Therefore, the door body is reinforced, and the door body is less likely to warp or twist.

(C) A triangular groove or an arc groove (large diameter groove) that opens to the inner surface is provided on the outer arc wall of the frame, and the triangular portion or circular portion (large diameter portion) of the hinge body is provided in the triangular groove or the arc groove. In addition to inserting the frame, the tip of the triangular part or circular part can contact the inner arc wall of the frame, and the triangular part or circular part can be bonded to the inner arc wall of the frame. It can be firmly connected to the hinge body.

(D) Since the outer diameter of the round bar is substantially the same as the inner diameter of the cylindrical portion of the hinge body, and the slit is formed in the cylindrical portion of the hinge body to give elasticity to the cylindrical portion. There is no gap between the inner surface of the cylindrical part of the hinge body and the round bar body, and the door can be opened and closed smoothly.

In addition to the effects of (a) and (c), the movable door of claim 4 has a frame body having a substantially U-shaped cross section attached to the side portion of the door body, so that the door body is reinforced, This has the effect that the door body is less likely to warp or twist.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a movable door according to a first embodiment.

FIG. 2 is a schematic plan view of the movable door.

FIG. 3 is a cross-sectional view showing a frame member and a hinge member of the movable door.

FIG. 4 is a front view showing a hinge member of the movable door.

FIG. 5 is a front view showing a round bar body of the movable door.

FIG. 6 is a cross-sectional view showing a frame member and a hinge member used for the movable door according to the second embodiment.

FIG. 7 is a cross-sectional view showing a frame member and a hinge member used for the movable door according to the third embodiment.

[Explanation of symbols]

 2 movable door 4 frame body 6 hinge body 8 round bar body 10 door body 16 front wall portion 18 rear wall portion 20 side wall portion 22 outer surface of outer arc wall 24 outer arc wall 26 inner arc wall 28 front wall projection 30 rear wall projection 32 Square groove 34 Triangular groove 36 Cylindrical part 38 Square part 40 Triangular part 44 Slit 48 Front groove part 50 Rear surface groove part 52 Arc groove 54 Circular part

Claims (4)

[Scope of utility model registration request] 1. A front wall portion, a rear wall portion, a side wall portion, a front wall portion and a side wall portion, or a rear wall portion and a side wall portion.
An outer arc wall whose outer surface forms a part of a circle centered on the intersection of the front wall and the side wall or the intersection of the rear wall and the side wall, and the front wall and the side wall inside the outer arc wall. An inner arc wall provided apart from the outer arc wall between the rear wall portion and the rear wall portion, a front wall projection provided on the inner surface of the front wall portion in a vertical direction, and a rear wall portion A rear wall projection that is provided on the inner surface of the outer wall so as to project in the vertical direction, and a square groove that opens to the outer surface is formed in the center of the outer arc wall along the radial direction of the circle and in the vertical direction. A frame having a substantially U-shaped cross-section, which is formed in a central portion of the outer arc wall along the up-down direction and which has a triangular groove having a diameter larger than that of the square groove communicating with the square groove and opening to the inner surface. The cross section has a circular shape centered on the intersection of the front wall portion and the side wall portion of the frame or the intersection of the rear wall portion and the side wall portion. The cylindrical portion that is placed in contact with the outer surface, the square portion that is inserted into the square groove of the frame, and the triangle portion that is inserted into the triangular groove of the frame and has its tip contacting the inner arc wall are connected. A hinge body provided with slits formed in the cylindrical portion along the vertical direction; and a round bar body having an outer diameter substantially the same as the inner diameter of the cylindrical portion of the hinge body and inserted into the cylindrical portion. A plurality of rectangular plate-shaped door bodies each having a front surface groove portion formed with a front wall protrusion of the frame body formed on a front surface thereof and a rear surface groove portion formed with a rear wall projection of the frame body formed on a rear surface thereof. The side of the door body is attached between the front wall and the rear wall of the frame with the front and rear wall projections of the frame inserted in the front and rear grooves of the door body. If the hinge body is connected to the frame body with the square and triangle portions of the hinge body inserted in the square and triangle grooves of In addition, the cylindrical portions of the hinge bodies arranged on the side portions of both door bodies adjacent to each other are coaxially continuous, and a plurality of door bodies are foldably connected by inserting the round bar bodies into these cylindrical portions. A movable door that is characterized by being. 2. A front wall portion, a rear wall portion, a side wall portion, a front wall portion and a side wall portion, or a rear wall portion and a side wall portion.
An outer arc wall whose outer surface forms a part of a circle centered on the intersection of the front wall and the side wall or the intersection of the rear wall and the side wall, and the front wall and the side wall inside the outer arc wall. An inner arc wall provided apart from the outer arc wall between the rear wall portion and the rear wall portion, a front wall projection provided on the inner surface of the front wall portion in a vertical direction, and a rear wall portion A rear wall projection that is provided on the inner surface of the outer wall so as to project in the vertical direction, and a square groove that opens to the outer surface is formed in the center of the outer arc wall along the radial direction of the circle and in the vertical direction. And a frame having a substantially U-shaped cross section, which is formed in an arc groove having a diameter larger than that of the square groove communicating with the square groove and opening on the inner surface in the central portion of the outer arc wall along the vertical direction, The cross section has a circular shape centered on the intersection of the front wall portion and the side wall portion of the frame or the intersection of the rear wall portion and the side wall portion. The cylindrical portion arranged in contact with the outer surface, the square portion inserted into the square groove of the frame body, and the circular portion inserted into the arc groove of the frame body and having the tip contacting the inner circular arc wall are connected. A hinge body provided with slits formed in the cylindrical portion along the vertical direction; and a round bar body having an outer diameter substantially the same as the inner diameter of the cylindrical portion of the hinge body and inserted into the cylindrical portion. A plurality of rectangular plate-shaped door bodies each having a front surface groove portion formed with a front wall protrusion of the frame body formed on a front surface thereof and a rear surface groove portion formed with a rear wall projection of the frame body formed on a rear surface thereof. The side of the door body is attached between the front wall and the rear wall of the frame with the front and rear wall projections of the frame inserted in the front and rear grooves of the door body. The hinge body is connected to the frame body with the square portion and the circular portion of the hinge body inserted in the square groove and the circular arc groove. In addition, the cylindrical portions of the hinge bodies arranged on the side portions of both door bodies adjacent to each other are coaxially continuous, and a plurality of door bodies are foldably connected by inserting the round bar bodies into these cylindrical portions. A movable door that is characterized by being. 3. A front wall portion, a rear wall portion, a side wall portion, a front wall portion and a side wall portion, or a rear wall portion and a side wall portion.
An outer arc wall whose outer surface forms a part of a circle centered on the intersection of the front wall and the side wall or the intersection of the rear wall and the side wall, and the front wall and the side wall inside the outer arc wall. An inner arc wall provided apart from the outer arc wall between the rear wall portion and the rear wall portion, a front wall projection provided on the inner surface of the front wall portion in a vertical direction, and a rear wall portion A rear wall projection that is provided on the inner surface of the outer wall so as to project in the vertical direction, and a square groove that opens to the outer surface is formed in the center of the outer arc wall along the radial direction of the circle and in the vertical direction. Along with the square groove, a large-diameter groove having a larger diameter than the square groove that is open to the inner surface and communicates with the square groove is formed along the up-down direction in the central portion of the outer arc wall, and a frame having a substantially U-shaped cross-section. The plane cross section forms a circle centered on the intersection of the front wall portion and the side wall portion of the frame or the intersection of the rear wall portion and the side wall portion, and A cylindrical portion arranged in contact with an outer surface, a square portion inserted into a square groove of the frame body, and a large diameter portion inserted into a large diameter groove of the frame body and having a tip contacting the inner arc wall. A hinge body in which slits are formed in the cylindrical portion along the vertical direction, and a round bar having an outer diameter substantially the same as the inner diameter of the cylindrical portion of the hinge body and inserted into the cylindrical portion. A body and a plurality of rectangular plate-shaped door bodies each having a front surface groove portion formed with a front wall projection of the frame body formed on a front surface thereof and a rear surface groove portion formed with a rear wall projection of the frame body formed on a rear surface thereof; With the front and rear wall projections of the frame inserted in the front and rear groove portions of the door body, the side portion of the door body is attached between the front and rear wall portions of the frame, The hinge body is connected to the frame body with the square portion and the large diameter portion of the hinge body inserted in the square groove and the large diameter groove of the frame body. In addition, the cylindrical portions of the hinge bodies arranged on the side portions of both door bodies adjacent to each other are coaxially continuous, and a plurality of door bodies are foldably connected by inserting the round bar bodies into these cylindrical portions. A movable door that is characterized by being. 4. A front wall portion, a rear wall portion, a side wall portion, a front wall portion and a side wall portion, or a rear wall portion and a side wall portion,
An outer arc wall whose outer surface forms a part of a circle centered on the intersection of the front wall and the side wall or the intersection of the rear wall and the side wall, and the front wall and the side wall inside the outer arc wall. The outer circular arc wall and the inner circular arc wall provided apart from each other between the rear wall portion and the side wall portion are provided, and the square groove opening to the outer surface is provided in the central portion of the outer circular arc wall along the radial direction of the circle. A large-diameter groove, which is formed along the vertical direction and has a diameter larger than that of the square groove communicating with the square groove and opening to the inner surface, is formed in the central portion of the outer arc wall along the vertical direction. A frame having a substantially U-shaped cross section, and a plane cross section of which is a circle centered on the intersection of the front wall and the side wall of the frame or the intersection of the rear wall and the side wall of the frame, and the outer surface of the outer arc wall. The cylindrical portion that is placed in contact with the frame, the square portion that is inserted into the square groove of the frame, and the large diameter groove of the frame that A hinge body in which a large-diameter portion that contacts the inner arc wall is continuously provided, a round bar body inserted into the cylindrical portion of the hinge body, and a plurality of square plate-shaped door bodies, The side part of the door body is attached between the front wall part and the rear wall part of the body, and hinges are attached to the frame with the square part and the large diameter part of the hinge body inserted in the square groove and the large diameter part of the frame. While the bodies are connected, the cylindrical portions of the hinge bodies arranged on the side portions of both door bodies adjacent to each other are coaxially continuous, and a plurality of door bodies are inserted by inserting the round bar bodies into these cylindrical portions. The movable door is characterized by being connected so that it can be folded.