Doors and windows

Abstract

This prevents foreign objects from getting caught when moving the door to the closed position, while also simplifying manufacturing operations and reducing manufacturing costs. [Solution] The wall W has a door body 20 disposed in an opening WO, and between the wall W and one side edge of the door body 20, there are upper and lower pivot hinges 21 which have a hinge axis C in the cross-section of the door body 20 and allow the door body 20 to open and move to one side and the other side of the wall W, at least one of the pivot hinges 21 is a self-closing type that biases the door body 20, and one side edge of the door body 20 is configured to have a cylindrical surface 20a centered on the hinge axis C along the top and bottom.

Description

Technical Field

[0001] The present invention relates to indoor furniture having a door body for opening and closing an opening of a wall body.

Background Art

[0002] In indoor furniture for opening and closing an opening provided in an indoor wall body, a door body is disposed via a frame so as to be openable and closable. A hinge is provided between one vertical frame constituting the frame and a side edge portion of the door body, and a handle is provided on the surface of the door body, so that the door body can be pushed open to one side of the wall body or returned to the closed position. Further, a door latch is provided on a portion of the door body on the side of the other vertical frame. Therefore, when the door body is placed in the closed position, the door latch is in an engaged state and the door body can be maintained in the closed position (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] By the way, in the above-described furniture, when moving the door body from the open position to the closed position, the gap between the end face on the hanging side of the door provided with the hinge and the vertical frame gradually decreases. Therefore, if the door body is moved to the closed position with a foreign object such as a finger placed in this portion, a situation where it is sandwiched between the door body and the vertical frame may occur. Further, since it is necessary to provide a handle and a door latch on the door body, the number of handling parts increases, which causes complication of manufacturing work and an increase in manufacturing cost. In addition, since the handle and the hinge are exposed to the outside, there is room for improvement in terms of appearance quality.

[0005] In view of the above circumstances, the present invention aims to provide a door that prevents foreign objects from getting caught when moving the door body to the closed position, and that can facilitate manufacturing work and reduce manufacturing costs. [Means for solving the problem]

[0006] To achieve the above objective, the joinery according to the present invention has a door body disposed in an opening in a wall, and between the wall and one side edge of the door body, there are upper and lower pivot hinges that have a hinge axis in the cross-section of the door body and allow the door body to move to one side and the other side of the wall, at least one of the pivot hinges is of a self-closing type that biases the door body, and one side edge of the door body is configured to have a cylindrical surface centered on an axis along the vertical. [Effects of the Invention]

[0007] According to the present invention, pivot hinges having hinge axes within the cross-section of the door body are provided at the top and bottom, so there is no risk of the pivot hinges being exposed to the outside. Moreover, since a self-closing type that allows the door body to be pushed open from both directions is used as the pivot hinge, there is no need to provide a handle and a door latch is also unnecessary. This reduces the number of parts, making it possible to simplify manufacturing work and reduce manufacturing costs, as well as providing advantages in terms of appearance quality. Furthermore, since one side edge of the door body is configured to have a cylindrical surface centered on an axis running vertically, when moving from the open position to the closed position, the change in the gap at one side edge of the door body is reduced, and there is no risk of foreign objects getting caught. [Brief explanation of the drawing]

[0008] [Figure 1] This shows an embodiment of the present invention, where (a) is an elevation view from a first interior space and (b) is an elevation view from a second interior space. [Figure 2] Figure 1 is a longitudinal cross-sectional view of the joinery shown, broken along a vertical plane in the direction of depth. [Figure 3] Figure 1 is a cross-sectional view of the joinery shown. [Figure 4] Figure 1 is a longitudinal cross-sectional view of the joinery shown, broken along a vertical plane in the direction of its appearance. [Figure 5] Figure 1 shows the joinery, where (a) is a cross-sectional view of the door body pushed open toward the second interior space, and (b) is a cross-sectional view of the door body pushed open toward the first interior space. [Figure 6] This is a cross-sectional view showing a joinery that is an embodiment 2 of the present invention. [Figure 7] This is a cross-sectional view of the main part showing a modified example 1, which is a joinery component. [Figure 8] This image shows a building component according to Embodiment 3 of the present invention, where (a) is a cross-sectional view and (b) is an enlarged cross-sectional view of the main part. [Figure 9] This is a cross-sectional view of the main part showing a modified example, the joinery. [Figure 10] This is a cross-sectional view of the main part showing the joinery, which is a modified example 3. [Modes for carrying out the invention]

[0009] The following describes in detail preferred embodiments of the joinery according to the present invention with reference to the attached drawings. For convenience, the terms "depth direction" and "face direction" may be used below. The depth direction is the direction along the depth of the joinery, as indicated by arrow A in the figure. The surface along the depth direction may be referred to as the depth surface. The face direction is the direction along the vertical direction perpendicular to the depth direction, in the case of a frame that extends horizontally, such as a bottom frame. In the case of a frame that extends vertically, such as a vertical frame, the face direction is the direction along the horizontal direction perpendicular to the depth direction. The surface along the face direction may be referred to as the face surface.

[0010] (Embodiment 1) Figures 1 to 4 show a joinery according to Embodiment 1 of the present invention. The joinery illustrated here is referred to as an interior door for opening and closing an opening WO provided in a wall W, and has vertical frames 10 on both sides of the opening WO, with a door body 20 provided between the left and right vertical frames 10. The opening WO is a vertically elongated rectangle provided in the wall W between the upper surface of a lower horizontal structural member F such as flooring material and the lower surface of a ceiling board R.

[0011] The left and right vertical frames 10 are constructed from wood or wood-based material to be symmetrical to each other, and have a length extending from the upper surface of the lower horizontal structural member F to the lower surface of the ceiling board R. In this embodiment 1, the outer peripheral surface is configured to be flat along the depth direction, while the inner peripheral surface of the vertical frame 10 has a central flat section 10a, two curved concave sections 10b, and two thin plate edge sections 10c. The central flat section 10a is flat along the depth direction and is located at the center of the vertical frame 10 in the depth direction. The curved concave sections 10b are provided on both sides of the central flat section 10a and are formed in a curved concave shape so that they gradually become more outer as they move away from the central flat section 10a. The thin plate edge sections 10c are provided so as to be continuous with each of the curved concave sections 10b and are flat along the depth direction. These vertical frames 10 are attached to the base material or vertical structural members 2 such as columns between the interior materials 1 that make up the wall W by screwing in screw members S via screw mounting portions 10d provided in the central flat portion 10a. The screw mounting portion 10d is a recess provided in the central flat portion 10a and may be provided in a groove shape along the entire length of the vertical frame 10, or it may be provided in multiple locations only in the part where the screw member S is screwed in. After the screw member S is screwed in, a cap member 11 is attached to the screw mounting portion 10d so as to cover the opening.

[0012] The door body 20 is sized to close the opening WO and has a rectangular shape. The thickness of the door body 20 is smaller than the dimension along the depth direction of the central flat portion 10a provided on the vertical frame 10. The side edges of the door body 20 are configured to have cylindrical surfaces centered on a central axis that runs vertically along the center plane of the plate thickness. As is clear from the figure, the cylindrical edge surface 20a located on the hinge side of the door body 20 has a smaller radius of curvature than the cylindrical edge surface 20b located on the door edge side. Neither of the surfaces 20c of the door body 20 are provided with handles. There is also no door latch on the side edge that forms the door edge of the door body 20.

[0013] The door body 20 is positioned between vertical frames 10 such that it can open and close an opening WO by providing pivot hinges 21 between the lower end surface of the side edge that serves as the hinge and the lower horizontal structural member F, and between the upper end surface of the side edge that serves as the hinge and the ceiling panel R. The hinge axis C of the pivot hinge 21 is configured to be aligned in the vertical direction. The upper and lower pivot hinges 21 each have their hinge axis C at a position that coincides with the cylindrical central axis of the edge surface 20a located on the hinge side of the door body 20, and support the door body 20 so that it can rotate while ensuring approximately the same gap between the left and right vertical frames 10 and the side edges of the door body 20. In the illustrated example, the upper pivot hinge 21A is used, which has a bearing member 21a embedded in the upper end of the door body 20 and a shaft member 21b provided on the lower surface of the ceiling panel R. The shaft member 21b is provided at the upper edge of the opening WO by screwing a screw member (not shown) into an upper horizontal structural member 3 such as a lintel via a ceiling plate R. The lower pivot hinge 21B has a bearing member 21c embedded in the lower end of the door body 20 and a shaft member 21d provided on the upper surface of the lower horizontal structural member F. Although not explicitly shown in the figure, the lower pivot hinge 21B is a self-closing type that biases the door body 20 to maintain the closed position at all times. As a self-closing pivot hinge 21B, for example, a torsion coil spring may be provided around the shaft member 21d, and the door body 20 may be moved to the open position against the spring force of the coil spring. The self-closing pivot hinge 21B may also have a damper built in to limit the speed at which the door body 20 moves to the closed position. Furthermore, the self-closing pivot hinge 21B does not necessarily need to maintain the door body 20 in the closed position; it is sufficient to simply bias it toward the closed position.

[0014] As described above, when no external force is applied, the interior door is maintained in the closed position (the position shown in Figure 3) by the self-closing pivot hinge 21B. This closes the opening WO in the wall W, thereby separating, for example, a first interior space from an adjacent second interior space.

[0015] From this state, for example, when a user in the first indoor space operates the door body 20 by pushing it, as shown in Fig. 5(a), the door body 20 is pushed open into the second indoor space against the biasing force of the self-closing pivot hinge 21B, and it becomes possible to move from the first indoor space to the second indoor space through the opening WO. When the operating force applied to the door body 20 is removed, the door body 20 moves back to the closed position due to the biasing force of the self-closing pivot hinge 21B, and the state where the first indoor space and the second indoor space are partitioned is restored.

[0016] Similarly, when a user in the second indoor space operates the door body 20 by pushing it, as shown in Fig. 5(b), the door body 20 is pushed open into the first indoor space against the biasing force of the self-closing pivot hinge 21B, and it becomes possible to move from the second indoor space to the first indoor space through the opening WO. When the operating force applied to the door body 20 is removed, the door body 20 moves back to the closed position due to the biasing force of the self-closing pivot hinge 21B, and the state where the first indoor space and the second indoor space are partitioned is restored.

[0017] According to the above-described interior door, a self-closing pivot hinge 21 that can push open the door body 20 from both directions is applied. Therefore, an interior door can be configured without providing a handle and a door latch, and it is possible to reduce the number of parts, facilitate the manufacturing operation, and reduce the manufacturing cost. Moreover, the side edge portion located on the hanging side of the door body 20 is configured to have a columnar edge surface 20a centered on the hinge axis C of the pivot hinge 21. Therefore, when the door body 20 is moved from the open position to the closed position, there is no change in the gap at the side edge portion located on the hanging side of the door body 20, and there is no risk of foreign objects being caught. Furthermore, since the pivot hinge 21 that supports the door body 20 is provided on the upper end surface and the lower end surface of the door body 20, in other words, since the pivot hinge 21 is provided vertically so as to have the hinge axis C within the cross section of the door body 20, there is no risk that the pivot hinge 21 will be exposed to the outside. As a result of these, the handle and the pivot hinge do not appear outside the door body 20, and a clean impression can be given, which is also advantageous in terms of the appearance quality.

[0018] (Embodiment 2) FIG. 6 shows a fitting according to Embodiment 2 of the present invention. The fitting exemplified here is an interior door for opening and closing the opening WO of the wall body W, similar to Embodiment 1, and mainly differs in the configuration of the vertical frame from Embodiment 1. That is, the vertical frames 12 applied to the interior door of Embodiment 2 are each configured to be symmetric with each other by wood or wood-based materials, and the prospective surface on the outer peripheral side is configured to be flat along the prospective direction, while the prospective surface on the inner peripheral side is configured to have a central flat portion 12a and two inclined edge portions 12b. The central flat portion 12a is flat along the prospective direction and is configured at the position that is the center in the prospective direction in the vertical frame 12. The inclined edge portions 12b are provided on both sides of the central flat portion 12a and are formed so as to gradually become the outer peripheral side as they are separated from the central flat portion 12a.

[0019] These vertical frames 12 are attached to the base material between the interior materials 1 and to vertical structural members 2 such as columns by screwing in screw members S via screw mounting portions 12c provided in the central flat portion 12a. The screw mounting portion 12c is a recess provided in the central flat portion 12a and is configured as a groove along the entire length of the vertical frame 12. After the screw member S is screwed in, each screw mounting portion 12c is provided with a light leakage prevention member 30. The light leakage prevention member 30 is molded from resin and has a mounting portion 30a at its base end and a sliding contact portion 30b at its tip. The mounting portion 30a is block-shaped with a flat base end surface. The sliding contact portion 30b is plate-shaped and is provided so as to protrude outward from the screw mounting portion 12c. As is clear from the figure, in Embodiment 2, the door body 20 is rotatably supported by the pivot hinge 21 at a position where the gap between the door body 20 and the left and right vertical frames 12 is larger on the door edge side than on the hinge side. On the vertical frame 12 provided on the hinge side of the door body 20, the sliding contact portion 30b of the light leakage prevention member 30 that protrudes outward from the screw mounting portion 12c is in contact with the edge surface 20a of the door body 20. In contrast, on the vertical frame 12 provided on the door edge side of the door body 20, the sliding contact portion 30b of the light leakage prevention member 30 that protrudes outward from the screw mounting portion 12c is in contact with the tip of the auxiliary light leakage prevention member 31 provided on the side edge located on the door edge side of the door body 20. The auxiliary light leakage prevention member 31 has the same configuration as the light leakage prevention member 30, and is attached to the door body 20 via the mounting portion 31a with the sliding contact portion 31b facing the vertical frame 12. Furthermore, other components similar to those in Embodiment 1 are denoted by the same reference numerals.

[0020] In this second embodiment of the interior door, a self-closing pivot hinge 21 is used, which allows the door body 20 to be pushed open from both directions. As a result, the interior door can be constructed without a handle or door latch, reducing the number of parts, simplifying manufacturing, and lowering manufacturing costs. Moreover, since the side edge of the door body 20 located on the hinge side has a cylindrical edge surface 20a centered on the hinge axis C of the pivot hinge 21, the gap at the side edge of the door body 20 located on the hinge side does not change when moving the door body 20 from the open position to the closed position, eliminating the risk of foreign objects getting caught. Furthermore, since the pivot hinges 21 are provided above and below the door body 20 so that the hinge axis C is within the cross-section of the door body 20, there is no risk of the pivot hinges 21 being exposed to the outside, giving the door body 20 a clean and neat appearance, which is also advantageous in terms of appearance quality. In addition, when the door body 20 is positioned in the closed position, the gap between the door body 20 and the vertical frame 12 is closed by the light leakage prevention member 30 and the auxiliary light leakage prevention member 31, thereby preventing light from entering from the adjacent room. Although the light leakage prevention member 30 on the door edge side is configured to contact the tip of the auxiliary light leakage prevention member 31 provided on the door body 20, the present invention is not limited to this, and as shown in Modification 1 in Figure 7, the light leakage prevention member 30 provided on the vertical frame 12 may be made to directly contact the side edge located on the door edge side of the door body 20.

[0021] (Embodiment 3) Figure 8 shows a door that is Embodiment 3 of the present invention. The door shown here is an interior door for opening and closing an opening WO in a wall W, similar to Embodiment 1, but differs from Embodiment 1 mainly in the configuration of the vertical frame, door body, and light leakage prevention member.

[0022] In other words, the vertical frame 12 used in the interior door of Embodiment 3 is the same as the one used in Embodiment 2. The door body 40 has a door body 41 molded from wood or wood-based material, and a cushion member 42 molded from a soft resin and attached to the side edge of the door body 41 which becomes the door edge. More specifically, the door body 41 is configured to be the same as the door body 20 of Embodiment 1, except for the side edge which becomes the door edge, and has a cylindrical edge surface 41a centered on the hinge axis C on the side edge which becomes the hinge. A locking member 43 is attached to the side edge of the door body 41, and the cushion member 42 is attached to the entire length of the side edge of the door body 41 via this locking member 43. The cushion member 42 has a door edge surface component 42a and two side surface components 42b. The door edge surface component 42a has a width that is approximately the same as the thickness of the door body 40. The side component 42b extends from both sides of the door edge component 42a in the same direction. The extended edge of the side component 42b is provided with a locking piece 42c that engages with the locking member 43. Both the door edge component 42a and the side component 42b are thin films and can be easily deformed elastically. The cushion member 42 is attached to the door body 41 in a state where a hollow portion 44 is formed between it and the locking member 43 by engaging with the locking piece 42c.

[0023] As shown in Figure 8(b), the light leakage prevention member 50 has sliding contact portions 50b on both side edges of the mounting piece 50a. This light leakage prevention member 50 is attached to the vertical frame 12 by locking the mounting piece 50a to a support receiving member 51 attached to the screw mounting portion 12c, so that the sliding contact portions 50b come into contact with the door body 40 and cushion member 42, which are positioned in the closed position. Other components similar to those in Embodiment 1 are denoted by the same reference numerals.

[0024] In this third embodiment of the interior door, a self-closing pivot hinge 21 is used, which allows the door body 40 to be pushed open from both directions. As a result, the interior door can be constructed without a handle or door latch, reducing the number of parts, simplifying manufacturing, and lowering manufacturing costs. Moreover, since the side edge of the door body 40 located on the hinge side has a cylindrical edge surface 41a centered on the hinge axis C of the pivot hinge 21, the gap at the side edge of the door body 40 located on the hinge side does not change when moving the door body 40 from the open position to the closed position, eliminating the risk of foreign objects getting caught. Furthermore, since the pivot hinges 21 are provided above and below the door body 40 so that the hinge axis C is within the cross-section of the door body 40, there is no risk of the pivot hinges 21 being exposed to the outside, giving the door body 40 a clean and neat appearance, which is also advantageous in terms of appearance quality. In addition, when the door body 40 is positioned in the closed position, the light leakage prevention member 50 closes the gap between the door body 40 and the vertical frame 12, thereby preventing light from entering from the adjacent room. Furthermore, if a foreign object is caught between the door edge of the door body 40 and the vertical frame 12, the cushion member 42 deforms appropriately, eliminating the risk of damage to the vertical frame 12 or the door body 40. As the light leakage prevention member 50 on the door edge side, as shown in Modification 2 in Figure 9, the light leakage prevention member 30 used in Embodiment 1 may be used, with its tip in contact with the cushion member 42. Although not explicitly shown in the figure, a cushion member may also be provided on the side edge that serves as the hinge point of the door body 41. However, the cushion member provided on the side edge that serves as the hinge point must have a cylindrical surface centered on the hinge axis C.

[0025] In the above-described embodiment, an interior door is illustrated where the opening WO is opened and closed by a single door body. However, it is also possible to configure it as a double-leaf interior door with two door bodies for the same opening WO. Furthermore, since the pivot hinge 21 is provided between the upper and lower horizontal structural members 3,F and the door body, the upper and lower ends of the hinge axis C can be directly supported by the door body and the upper and lower horizontal structural members 3,F, which is advantageous in terms of strength. However, the present invention is not limited to this. For example, it is also possible to extend an arm from the vertical frame 12 and support one end of the hinge axis C at the extended end of this arm. Moreover, although the vertical frame 12 is provided in the opening WO of the wall body W, when the pivot hinge 21 is provided between the upper and lower horizontal structural members 3,F and the door body, it is not necessarily required to provide a vertical frame or vertical structural member on the side edge of the opening WO. In the above-described embodiment, when a vertical frame is provided, the visible surface on the inner circumference gradually becomes the outer circumference from the central part toward both sides, so it is possible to exhibit a desirable appearance quality, such as the vertical frame appearing thin. However, it is not always necessary to apply a vertical frame where the inner circumference is gradually directed outwards from the center to both sides. Furthermore, although the door body is configured such that one side has a cylindrical surface centered on the hinge axis, it is sufficient to configure it so that it has a cylindrical surface along the top and bottom.

[0026] Furthermore, in the above-described embodiment, since no handle is provided on the door body, the door body can be given a clean impression, which is advantageous in terms of appearance quality, but the present invention is not limited to this. For example, as shown in Modification 3 in Figure 10, a door edge member 60 in which a pull handle 60a is integrated may be attached to the door body 41 of the door body 40 applied in Embodiment 3, along the entire length of the side edge that becomes the door edge. The door edge member 60 is an extruded profile formed from a metal such as an aluminum alloy. In this Modification 3, the door edge member 60 is composed of a flat base plate portion 60b, a door panel portion 60c protruding from one surface of the base plate portion 60b, and pull handles 60a provided on both side edges of the base plate portion 60b. The base plate portion 60b has a width approximately the same as the thickness of the door body 41 and is provided along the entire length of the door body 41 along the top and bottom. The door panel portion 60c protrudes from the central part of the base plate portion 60b. In the illustrated example, the door panel 60c is composed of a thin plate base 60d having a constant plate thickness and a door edge plate 60e provided such that the plate thickness gradually increases from the protruding edge of the thin plate base 60d. The maximum plate thickness of the door edge plate 60e is smaller than the plate thickness of the door body 41. Similar to the first modified example, the tip of the light leakage prevention member 30 provided on the vertical frame 12 abuts against the tip of the door panel 60c. The pull handle 60a is a thin plate-shaped member that extends in the visible direction from both side edges of the base plate 60b. This pull handle 60a extends from the base plate 60b toward the door edge to a position that covers the thin plate base 60d of the door panel 60c. In this third modified example, similar to the embodiment, the door body 41 can be pushed open to one side and the other side of the wall W. Furthermore, the door body 41, positioned in the closed position, can be pulled forward via the handle 60a, thereby opening the opening WO. The handle 60a may be provided on only one side of the door edge member 60.

[0027] As described above, the joinery according to the present invention has a door body disposed in an opening in a wall, and between the wall and one side edge of the door body, there are upper and lower pivot hinges that have a hinge axis in the cross-section of the door body and allow the door body to move to one side and the other side of the wall, at least one of the pivot hinges is of a self-closing type that biases the door body, and one side edge of the door body is configured to have a cylindrical surface centered on an axis along the vertical. According to this invention, pivot hinges with hinge axes located within the cross-section of the door body are provided at the top and bottom, so there is no risk of the pivot hinges being exposed to the outside. Moreover, since a self-closing type that allows the door body to be pushed open from both directions is used as the pivot hinge, there is no need to provide a handle, and a door latch is also unnecessary. This reduces the number of parts, making it possible to simplify manufacturing work and reduce manufacturing costs, as well as providing advantages in terms of appearance quality. Furthermore, since one side edge of the door body is configured to have a cylindrical surface centered on an axis running vertically, when moving from the open position to the closed position, the change in the gap at one side edge of the door body is reduced, and there is no risk of foreign objects getting caught.

[0028] Furthermore, the present invention is characterized in that, in the above-described joinery, one side edge of the door body is configured to have a cylindrical surface centered on the hinge axis. According to this invention, since one side edge of the door body is configured to have a cylindrical surface centered on the hinge axis, the gap at one side edge of the door body does not change when moving from the open position to the closed position, making it possible to more reliably prevent foreign objects from getting caught.

[0029] Furthermore, the present invention is characterized in that, in the above-described joinery, an upper horizontal structural member is provided at the upper edge of the opening in the wall, a lower horizontal structural member is provided at the lower edge, the upper pivot hinge is provided between the door body and the upper horizontal structural member, and the lower pivot hinge is provided between the door body and the lower horizontal structural member. According to this invention, the upper and lower ends of the hinge axis can be directly supported by the door body and the upper and lower horizontal structural members, which is advantageous in terms of strength.

[0030] Furthermore, the present invention is characterized in that, in the above-described joinery, the other side edge of the door body is configured to have a cylindrical surface centered on an axis running vertically. According to this invention, since there is no edge portion on the door surface of the door body when it is in the open position, there is no risk of damage if it comes into contact with foreign objects.

[0031] Furthermore, the present invention is characterized in that, in the above-described joinery, the other side edge of the door body is provided with a soft cushioning member. According to this invention, even if foreign objects are caught between the door edge and the opening edge of the wall, the cushioning member deforms appropriately, thus eliminating the risk of damage to the opening edge of the wall or the door.

[0032] Furthermore, the present invention is characterized in that, in the above-described joinery, one side edge of the door body is provided with a soft cushioning member, and the cushioning member has a cylindrical surface. According to this invention, since the portion having a cylindrical surface is formed by a cushioning member, there is no need to directly form a cylindrical surface on the door body.

[0033] Furthermore, the present invention is characterized in that, in the above-described joinery, vertical frames are provided on both side edges of the opening at positions facing the opening, and the inner surface of the vertical frame extends from the center in the depth direction toward the outer periphery on both sides. According to this invention, a gap can be secured between the vertical frame and the door when the door is positioned in the open position.

[0034] Furthermore, the present invention is characterized in that, in the above-described joinery, vertical frames are provided on both sides of the opening at positions facing the opening, and a light leakage prevention member is provided between the vertical frames and the door body. According to this invention, when the door is in the closed position, light from the adjacent room will not enter.

[0035] Furthermore, the present invention is characterized in that, in the above-described joinery, the door body omits both the handle on one surface and the handle on the other surface. This invention not only eliminates the need for processing when attaching a handle to the door body, but also offers advantages in terms of appearance quality. [Explanation of Symbols]

[0036] 3 Upper horizontal structural member, 10, 12 Vertical frame, 20, 40 Door body, 20a, 20b, 41a Edge surface, 21 (21A, 21B) Pivot hinge, 30, 50 Light leakage prevention member, 31 Auxiliary light leakage prevention member, 42 Cushion member, C Hinge axis, F Lower horizontal structural member, W Wall body, WO Opening

Claims

1. It has a door body that is installed in an opening in the wall, Between the wall and one side edge of the door, there is an upper and lower pivot hinge having a hinge axis within the cross-section of the door, which allows the door to open and move toward one side and the other side of the wall. At least one of the pivot hinges is a self-closing type that biases the door body, The door frame is characterized in that one side edge of the door body is configured to have a cylindrical surface centered on an axis running vertically.

2. The joinery according to claim 1, characterized in that one side edge of the door body is configured to have a cylindrical surface centered on the hinge axis.

3. An upper horizontal structural member is provided at the upper edge of the opening in the wall, and a lower horizontal structural member is provided at the lower edge. The joinery according to claim 1, characterized in that the upper pivot hinge is provided between the door body and the upper horizontal structural member, and the lower pivot hinge is provided between the door body and the lower horizontal structural member.

4. The door fitting according to claim 1, characterized in that the other side edge of the door body is configured to have a cylindrical surface centered on an axis running vertically.

5. The door fitting according to claim 1, characterized in that the other side edge of the door body is provided with a soft cushioning member.

6. The door frame according to claim 1, characterized in that one side edge of the door body is provided with a soft cushioning member, and the cushioning member has a cylindrical surface.

7. Vertical frames are provided on both side edges of the opening, at positions facing the opening. The joinery according to claim 1, characterized in that the surface on the inner circumference side of the vertical frame extends from the center in the depth direction toward both sides, gradually becoming the outer circumference.

8. Vertical frames are provided on both sides of the opening, at positions facing the opening. The joinery according to claim 1, characterized in that a light leakage prevention member is provided between the vertical frame and the door body.

9. The door frame according to claim 1, characterized in that the door body omits both the handle on one surface and the handle on the other surface.

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