Biaxial hinge and fitting device using this biaxial hinge

Abstract

To provide a biaxial hinge capable of suppressing a fitting from wobbling in a thickness direction when used in the fitting device.SOLUTION: The biaxial hinge includes: a link member 51 that constitutes a first center of rotation c1 on one end side and a second center of rotation c2 spaced on the other end; a first rotating member 52b that is connected to the link member 51 so as to rotate on the first center of rotation c1; and a second rotating member 53b that is connected to the link member 51 so as to rotate on the second center of rotation c2. The second center of rotation c2 is tilted with respect to the first center of rotation c1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a biaxial hinge that rotates doors, windows, shoji screens, etc. to open and close them, and to a fitting device that uses this biaxial hinge. [Background technology]

[0002] Conventional inventions of this type, for example as described in Patent Document 1, include a biaxial hinge that includes a connecting rod that is spanned between a door and a door frame, a first shaft that passes vertically through the connecting rod on the door frame side, a second shaft that passes vertically through the connecting rod on the door side and is parallel to the first shaft, two pairs of block-shaped bearing bodies that rotatably support the top and bottom of the first shaft and the second shaft on the door frame and the door, respectively, and fastening members that pass vertically through the bearing bodies to screw the bearing bodies to each of the adjacent mounting surfaces when the door and the door frame are closed. With this biaxial hinge, after the door is rotated around the first axis to be almost fully closed, the door can be moved parallel to the thickness direction of the door by rotating around both the first and second axes, pushing the door into the door frame and firmly pressing it against the packing. This improves soundproofing, waterproofing, and other sealing performance when the door is closed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-25274 [Patent Document 2] Japanese Patent Application Laid-Open No. 2018-59369 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, the door is made rotatable and movable in the thickness direction by two parallel shafts (first shaft and second shaft). Therefore, while the door is rotating or in the closed state, the rotation of the two shafts may cause the door to wobble in the thickness direction. [Means for solving the problem]

[0005] In view of the above problems, the present invention has the following configuration. a link member that defines a first rotation center on one end side and a second rotation center at a distance on the other end side; A biaxial hinge is configured to be attached across a frame member and a fixture, comprising a first uniaxial hinge attached to one end of the link member and a second uniaxial hinge attached to the other end of the link member, wherein the first uniaxial hinge comprises a first support member having a cylindrical bearing portion fixed to one end of the link member, and a first rotating member having a cantilevered shaft portion that fits rotatably with the bearing portion of the first support member, and the second uniaxial hinge comprises: The hinge is provided with a second support member having a cantilevered shaft portion fixed to the other end side of the link member, and a second rotating member having a cylindrical bearing portion rotatably fitted onto the shaft portion of the second support member, wherein the shaft portion of the first uniaxial hinge and the shaft portion of the second uniaxial hinge protrude so as to narrow the gap between their free ends, and respectively constitute the first rotation center and the second rotation center that is inclined with respect to the first rotation center on an imaginary plane including the first rotation center. A biaxial hinge characterized by the above. Another aspect of the present invention has the following configuration. A fitting device using a biaxial hinge, comprising: a link member that forms a first rotation center on one end side and a second rotation center spaced apart on the other end side; a first rotating member connected to the link member so as to rotate about the first rotation center as a fulcrum; and a second rotating member connected to the link member so as to rotate about the second rotation center as a fulcrum, wherein the second rotation center is inclined with respect to the first rotation center, and the fitting device comprises a frame member to which the first rotating member is fixed, and a fitting fixed to the second rotating member, and the fitting device is capable of opening and closing, rotating, and moving in the fitting thickness direction. . [Effects of the Invention]

[0006] Since the present invention is configured as described above, when used in a fitting device, it is possible to prevent the fitting from wobbling in the thickness direction. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view of an example of a fitting device according to the present invention as viewed from the outdoor side. [Figure 2] FIG. 2 is a cross-sectional view taken along the line (II)-(II) in FIG. [Figure 3] FIG. 2 is an exploded perspective view showing a biaxial hinge portion of the same fitting device. [Figure 4] FIG. 2 is a front view of the biaxial hinge used in the fitting device, showing the separated state. [Figure 5] These are simplified cross-sectional views of the biaxial hinge part of the same fixture device, where (a) shows the fixture in the process of closing, (b) shows the fixture fully closed, and (c) shows the fixture pushed in. [Figure 6] FIG. 10 is a front view of another example of the fitting device according to the present invention, as viewed from the outdoor side. DETAILED DESCRIPTION OF THE INVENTION

[0008] This embodiment discloses the following features. The first feature is that the device comprises a link member that forms a first rotation center on one end side and a second rotation center spaced apart on the other end side, a first rotating member connected to the link member so as to rotate around the first rotation center as a fulcrum, and a second rotating member connected to the link member so as to rotate around the second rotation center as a fulcrum, and the second rotation center is inclined with respect to the first rotation center (see Figures 1 to 6).

[0009] As a second feature, the second rotation center is located on a virtual plane including the first rotation center (see FIG. 2).

[0010] As a third feature, the link member is detachable from the first rotating member or the second rotating member (see FIGS. 3 and 4).

[0011] As a fourth feature, the link member has the axial center of the first uniaxial hinge attached to one end as the first rotation center, and the axial center of the second uniaxial hinge attached at an angle to the other end as the second rotation center (see FIGS. 2 to 5).

[0012] The fifth feature is a fitting device comprising a frame member to which the first pivoting member is fixed and a fitting fixed to the second pivoting member, so that the fitting can be pivoted open and closed and can be moved in the thickness direction of the fitting (see Figure 5).

[0013] As a sixth feature, the first rotating member is fixed to the frame member so that the first rotation center is approximately vertical, and the second rotating member is fixed to the fixture so that the second rotation center is inclined relative to the first rotation center (see Figures 2 to 5).

[0014] As a seventh feature, the second rotation center is tilted upward so as to approach the frame member (see FIG. 1).

[0015] As an eighth feature, the second rotation center is tilted upward so as to move away from the frame member (see FIG. 6).

[0016] As a ninth feature, a plurality of the biaxial hinges are provided along the extending direction of the frame member (see FIGS. 1 and 6).

[0017] As a tenth feature, the fitting rotates in the closing direction and then moves in the projection direction to come into substantially close contact with the frame member (see FIG. 5(c)).

[0018] <Specific embodiment> Next, specific embodiments having the above-mentioned features will be described in detail with reference to the drawings. In the following description, the door tip direction or door tip side means the centrifugal direction side of the door fitting 20 that rotates to open and close, and the door tail direction or door tail side means the opposite direction to the door tip direction. Also, the door / window thickness direction means the direction of the thickness of the door / window 20.

[0019] In the following description, the outdoor side refers to one side in the thickness direction of the fitting 20 in a fully closed state. According to the illustrated example, the outdoor space is the space located on the opening side of the fitting 20 in a fully closed state. In contrast, the indoor side is the other side in the thickness direction of the fitting 20 in a fully closed state. According to the illustrated example, the indoor space is a space located on the opposite side to the outdoor side. Contrary to the illustrated example, it is also possible to designate one side of the fitting 20 in the fitting thickness direction as the indoor side and the other side as the outdoor side.

[0020] In the following description, the inside of the width direction of the fixture means the inside of the horizontal width direction of the fixture 20. For example, when the door edge of the fixture 20 is used as the reference, the inside of the width direction of the fixture is the door tail side, and when the door tail side of the fixture 20 is used as the reference, the inside of the width direction of the fixture is the door edge side. Further, the outer side in the width direction of the fixture means the opposite side to the inner side in the width direction of the fixture.

[0021] In the following description, the inside in the thickness direction of the fitting means the inside in the thickness direction of the fitting 20. For example, when the face of the fitting 20 on the opening side is used as a reference, the inside in the thickness direction of the fitting is the side on the closing side of the fitting 20, and when the face of the fitting 20 on the closing side is used as a reference, the inside in the thickness direction of the fitting is the side on the opening side of the fitting 20. In addition, the outer side of the thickness direction of the fixture means the opposite side of the inner side of the thickness direction of the fixture.

[0022] In the following description, the "visible direction" refers to the thickness direction (depth direction) of the frame member, and the "visible direction" refers to the width direction (left-right direction) of the frame member, which is a direction substantially perpendicular to the "visible direction."

[0023] The fitting device 1 shown in Figure 1 comprises a frame body 10 made up of multiple frame members in a rectangular frame shape, a fitting 20 that opens and closes an opening within this frame body, and a biaxial hinge A that supports the fitting 20 so that it can be rotated open and closed and can move in the thickness direction of the fitting, and forms a watertight door device that exhibits watertight performance by pushing the fitting 20 toward the indoor side after it has been almost fully closed.

[0024] The frame body 10 is configured as a single rectangular frame with an opening in the center, and includes a trailing-side frame member 11 that faces and is close to the trailing edge of the door fixture 20 when it is closed, a leading-side frame member 12 that faces and is close to the leading edge of the door fixture 20, and an upper frame member 13 and a lower frame member 14 that face and are close to the upper and lower ends of the door fixture 20, respectively. The frame body 10 is fixedly secured to an opening in the framework of a building or the like. Each of the frame members 11, 12, 13, and 14 is made of metal.

[0025] The trailing edge frame member 11 is a member that extends vertically in a long, continuous shape. A groove 11a that extends vertically and has an opening facing the outdoors is provided on the inside of the trailing edge frame member 11, on the indoor side of the fitting 20. An elastic member 40 is attached to this groove 11a so as to be pressed against the indoor side of the fitting 20 in the fully closed state (see FIG. 2).

[0026] The leading edge frame member 12 is formed symmetrically to the trailing edge frame member 11. Although not shown in the figures, an elastic member 40 is also attached to this leading edge frame member 12 so that it is pressed against the indoor side of the fitting 20 in the fully closed state.

[0027] The upper frame member 13 and the lower frame member 14 are each continuous in the left-right direction. Although not shown, elastic members 40 are also attached to these upper frame member 13 and lower frame member 14 so that they are pressed against the indoor side of the door fitting 20 in the fully closed state.

[0028] The elastic member 40 is attached to the frame body 10 so as to face the surface of the fitting 20 on the closing direction side. The elastic member 40 is a single or multiple long members made of rubber, elastomer resin, elastic foam resin, or the like, and is configured in the shape of a rectangular frame surrounding the opening in the frame 10 . When the fitting 20 is in the closed state, it comes into contact with the elastic member 40, thereby separating the indoor space from the outdoor space in a substantially sealed manner.

[0029] In this embodiment, a single row of elastic members 40 is provided for the trailing edge frame member 11, the leading edge frame member 12, the upper frame member 13, or the lower frame member 14, but as another example, multiple rows of elastic members 40 may be provided. More specifically, the trailing edge frame member 11 may be provided with another elastic member that abuts against the fitting 20 in the fully closed state, on the inner side or outer side of the elastic member 40 in the width direction of the fitting. For example, the structure disclosed in Figure 2 of Patent Document 1 can be applied to this configuration.

[0030] The fitting 20 is a door body that has a rectangular plate shape when viewed from the front. The interior of this fitting 20 is hollow or has a core material. This fitting 20 comprises a front panel 21 and a back panel 22 (see Figure 2) spaced apart in the thickness direction, a plurality of frames (not shown) that support and reinforce these from the inside, and pushing devices 30, 30 (see Figure 1) for pushing the fitting 20 in the closed position in the closing direction (towards the interior in the illustrated example).

[0031] The front panel 21 and back panel 22 are made by processing metal plates appropriately to form a rectangular shape when viewed from the front, with the left and right edges and the top and bottom edges bent inward in the thickness direction of the door and window. The front panel 21 and back panel 22 are prevented from bending by multiple frames (not shown) inside. The top plate 21 and the back plate 22 can be made up of a single plate material or three or more plate materials.

[0032] A plurality of pushing devices 30 (two in the illustrated example) are provided corresponding to the left and right portions of the fitting 20. Each pushing device 30 rotates the lever 31 to protrude an engaging member (not shown) toward the frame body 10, inserting this engaging member into an engaged portion (not shown) provided on the frame body 10 and sliding it against a cam slope (not shown) of this engaged portion, thereby moving the fitting 20 approximately parallel to the interior side and pressing it against the elastic member 40. It should be noted that the pushing device 30 may have the structure disclosed in Patent Document 2, for example.

[0033] 1, reference numeral 61 denotes an opening / closing knob for opening and closing the fitting 20, and by rotating this opening / closing knob 61, a latch (not shown) appears and disappears on the door edge surface of the fitting 20. The door edge side frame member 12 is provided with a latch receiver (not shown) that fits into the latch. 1, reference numeral 62 denotes a locking mechanism. This locking mechanism extends and retracts a deadbolt (not shown) by operating a thumb turn or key on the door fixture 20, and then engages and disengages the deadbolt with a recessed seat (not shown) in the door-end frame member 12.

[0034] A plurality of biaxial hinges A are provided along the extending direction of the trailing edge side frame member 11, and in the illustrated example, two are provided on the upper half side of the trailing edge side frame member 11 and one is provided on the lower half side.

[0035] Each biaxial hinge A includes a link member 51 that forms a linear first rotation center c1 on one end side and a linear second rotation center c2 spaced apart on the other end side, a first rotating member 52b connected to the link member 51 so as to rotate around the first rotation center c1 as a fulcrum, and a second rotating member 53b connected to the link member 51 so as to rotate around the second rotation center c2 as a fulcrum. In the biaxial hinge A, the second center of rotation c2 is located on an imaginary plane including the first center of rotation c1 and is tilted relative to the first center of rotation c1. In other words, the first center of rotation c1 and the second center of rotation c2 are located on the same imaginary plane, and the second center of rotation c2 is tilted relative to the first center of rotation c1. Each member constituting this biaxial hinge A is made of a hard material such as metal (for example, stainless steel).

[0036] In the illustrated example, the link member 51 is a rectangular flat plate-shaped member. This link member 51 has the axis of the first uniaxial hinge 52 attached to one end as the first rotation center c1, and the axis of the second uniaxial hinge 53 attached at an angle to the other end as the second rotation center c2.

[0037] A rectangular flat cover plate 54 is fastened to the link member 51 by fasteners 35 so as to cover almost the entire surface of the link member 51. This cover plate 54 covers and conceals holes for fastening the first uniaxial hinge 52, the second uniaxial hinge 53, etc., and can be omitted.

[0038] The first uniaxial hinge 52 has a first pivot member 52b rotatably and detachably supported on a first support member 52a. The basic structure of a general flag hinge can be applied to this first uniaxial hinge 52.

[0039] The first support member 52a is formed in a substantially rectangular flat plate shape, and has a cylindrical bearing portion 52a1 at one end side in the width direction thereof. The first support member 52a has its bearing portion 52a1 facing up and down near the door edge, and its flat portion is fixed to the back surface (the surface on the fixture 20 side) of the link member 51. In the illustrated example, this fixing means is fastening using fasteners 35 (for example, screws, bolts, rivets, etc.), but other fixing means such as welding can also be used. The center of the bearing portion 52a1 functions as a first rotation center c1 when the link member 51 rotates in accordance with the opening and closing operation of the fitting 20 (see FIG. 5).

[0040] The first rotating member 52b is a member arranged vertically (in the illustrated example, below) with respect to the first support member 52a on the first rotation center c1, and is formed in a substantially rectangular flat plate shape. A substantially cylindrical shaft portion 52b1 is provided on one end side in the width direction of the first rotating member 52b so as to protrude toward the first support member 52a (see FIGS. 4 and 5).

[0041] The shaft portion 52b1 is fitted into the bearing portion 52a1 of the first support member 52a, thereby rotatably supporting the first support member 52a. The shaft portion 52b1 is axially insertable into and removable from the bearing portion 52a1.

[0042] The first rotating member 52b having the above-described configuration is fixed to the trailing edge side frame member 11 with the shaft portion 52b1 positioned on the front side and the axis of the shaft portion 52b1 (first rotation center c1) being approximately vertical (see FIG. 3). This fixing means is the fastener 35 in the illustrated example, but welding or other fixing means can also be used.

[0043] The second uniaxial hinge 53 has a second rotating member 53b rotatably and detachably supported on a second support member 53a so as to be aligned on a second rotation center c2. This second uniaxial hinge 53 can use parts that are common to the first uniaxial hinge 52. The second uniaxial hinge 53 is attached to the link member 51 with its axial direction (second rotation center c2) inclined relative to the vertical direction.

[0044] The second support member 53a has the same configuration as the first rotating member 52b of the first single-axis hinge 52, and has a substantially cylindrical shaft portion 53a1 that protrudes in one direction in the vertical direction at one end side in the width direction (see FIG. 3). The center of the shaft portion 53a1 functions as a second rotation center c2 when the base plate 57 rotates relative to the link member 51 as the fitting 20 is pushed in (see FIG. 5(a)). This second support member 53a is fixed to the back side of the link member 51 via a spacer 55, with the shaft portion 53a1 and the second rotation center c2 tilted upward so as to approach the trailing edge side frame member 11. In the illustrated example, the means for fixing the second support member 53a to the link member 51 is fastening using the fastener 35, but other fixing means such as welding may also be used.

[0045] The second rotating member 53b is a member having the same configuration as the first support member 52a of the first uniaxial hinge 52, and has a cylindrical bearing portion 53b1 on one end side in the width direction. The second rotating member 53b has a flat portion fixed to a base plate 57 via a spacer 56 (see FIG. 3) with the axis of the bearing portion 53b1 (second rotation center c2) tilted upward so as to approach the trailing edge frame member 11. In the illustrated example, this fixing means is fastening using fasteners 35 (for example, screws, bolts, rivets, etc.), but other fixing means such as welding can also be used.

[0046] Spacer 56 is a rectangular flat plate-shaped member that is sandwiched between second rotating member 53b and substrate 57. As an example other than the example shown in the figures, spacer 56 can be a part that is integrally formed with second rotating member 53b or substrate 57.

[0047] The base plate 57 is a rectangular flat plate member having appropriate rigidity and thickness, and is fixed to the front panel 21 of the fitting 20 by a fastener 35.

[0048] In the illustrated example, the fastener 35 inserted into the base plate 57 penetrates the front plate 21 and is screwed into the reinforcing plate 58 on the back side of the front plate 21 and fastened. In addition, as an example other than the illustrated example, it is also possible to omit the reinforcing plate 58 and have the base plate 57 directly screwed to the front plate 21, or to have the base plate 57 welded to the front plate 21, etc.

[0049] In the biaxial hinge A having the above configuration, the second rotation center c2, which is the axis of the second support member 53a and the second rotating member 53b, is inclined at an angle α with respect to the first rotation center c1, which is the axis of the first support member 52a and the first rotating member 52b. The angle α is set appropriately depending on the size of the fitting 20, and is set within the range of 0.3 to 15°, for example.

[0050] The link member 51 is rotatably supported on the trailing edge frame member 11 with a substantially vertical first rotation center c1 as a fulcrum, and also rotatably supports the base plate 57 and the fitting 20 with an inclined second rotation center c2 as a fulcrum.

[0051] Next, the work of hanging the fitting 20 onto the frame 10 will be described. In this operation, the first rotating member 52b constituting the biaxial hinge A is fixed to the trailing edge side frame member 11 before the fitting 20 is hung in. The second rotating member 53b constituting the biaxial hinge A is fixed to the fitting 20 via a spacer 56, a substrate 57, and the like.

[0052] Furthermore, a first support member 52a and a second support member 53a are fixed to the link member 51 of the biaxial hinge A (see FIG. 4). The link member 51, the first support member 52a, the second support member 53a, the spacer 55, the cover plate 54, etc. can be integrally assembled in advance and handled as one component.

[0053] Next, the first support member 52a integral with the link member 51 is assembled to the first rotating member 52b on the trailing edge side frame member 11 side (see FIGS. 3 and 4). Furthermore, a second pivoting member 53b integral with the fixture 20 is attached to a second support member 53a integral with the link member 51.

[0054] These lifting operations to Therefore, as shown in Figs. 2 and 5, the fitting 20 is connected to the trailing edge side frame member 11 so as to be able to rotate to open and close and to move in the fitting thickness direction. In this connected state, the link member 51 is detachable from both the trailing edge frame member 11 and the fitting 20 by means of the separable first uniaxial hinge 52 and second uniaxial hinge 53 .

[0055] Next, the action and effect of the fitting device 1 configured as described above when closing the fitting 20 and pushing it into the frame 10 will be described in detail. First, when the fitting 20 in an open state is closed, the fitting 20 rotates in the closing direction around the first rotation center c1 at the biaxial hinge A (see FIG. 5(a)). Then, the fitting 20 in the fully closed state has its peripheral edge loosely pressed against the elastic member 40 (see FIG. 5(b)).

[0056] In normal use, the fitting 20 rotates between the fully closed state and the open state described above. During this rotation (FIGS. 5(a) and 5(b)), the resistance to rotation about the tilted second center of rotation c2 is greater than the resistance to rotation about the first center of rotation c1, due to the unevenness of the mounting angles of the first uniaxial hinge 52 and the second uniaxial hinge 53 (i.e., the first center of rotation c1 and the second center of rotation c2 are not parallel due to the difference in the mounting angles). In other words, in two vertically adjacent biaxial hinges A, A, the second center of rotation c2 of the upper biaxial hinge A and the second center of rotation c2 of the lower biaxial hinge A are not positioned on the same axis, and therefore the second uniaxial hinge 53 of the upper biaxial hinge A and the second uniaxial hinge 53 of the lower biaxial hinge A mutually restrict rotation. Therefore, when the fitting 20 is rotated to open or close, only rotation occurs around the first rotation center c1 of the biaxial hinge A, preventing the fitting 20 from wobbling in the door thickness direction due to rotation around the second rotation center c2.

[0057] When water needs to be stopped due to flooding or the like, the pushing device 30 is operated in the fully closed state, and the fitting 20 moves toward the interior along the projection direction, and the peripheral side of the fitting 20 is strongly pressed against the elastic member 40 that is integral with the frame body 10 (see Figure 5(c)). As a result, the gap between the fitting 20 and the frame body 10 is almost completely closed, providing a watertight effect.

[0058] In this type of water-stopping operation, each link member 51 rotates indoors around the first rotation center c1 as a fulcrum, and the fitting 20 rotates outdoors around the inclined second rotation center c2 as a fulcrum. These two types of rotation cause the fitting 20 to move indoors in a generally parallel manner.

[0059] Therefore, according to the fitting device 1 configured as described above, under normal circumstances, wobbling of the fitting 20 in the thickness direction can be suppressed, and the fitting 20 can be smoothly rotated to open and close with the first rotation center c1 as the fulcrum. In addition, in the event of a flood, the closed fitting 20 can be moved parallel to the projection direction to press firmly against the elastic member 40, thereby providing excellent water-stopping performance. Furthermore, by separating the first uniaxial hinge 52 or the second uniaxial hinge 53, the fitting 20 can be easily attached to and detached from the frame 10, resulting in excellent workability and maintainability.

[0060] Furthermore, while the fitting 20 is moving in the forward direction, the rotation around the inclined second rotation center c2 as a fulcrum causes the gap between each side of the fitting 20 (more specifically, the door edge, door tail, upper end, lower end, etc.) and the opposing frame member (specifically, the door tail side frame member 11, door edge side frame member 12, upper frame member 13, lower frame member 14, etc.) to be non-constant in the longitudinal direction of each frame member. For this reason, the gap between each side of the fitting 20 and the opposing frame member is appropriately set so that the rotation about the inclined second rotation center c2 does not cause the gap to become too large or too small, resulting in friction.

[0061] <Modification> According to the above embodiment, as a particularly preferred example, the second rotation center c2 is located on a virtual plane including the first rotation center c1 and is inclined relative to the first rotation center c1. However, as another example, the second rotation center c2 can be configured not to be located on a virtual plane including the first rotation center c1 and to be inclined relative to the first rotation center c1.

[0062] Furthermore, according to the above embodiment, three biaxial hinges A are provided along the trailing edge frame member 11, but other examples include an embodiment in which four or more biaxial hinges A are provided along the trailing edge frame member 11, an embodiment in which two biaxial hinges A are provided so as to be located at the upper and lower sides of the trailing edge frame member 11, and an embodiment in which the fitting 20 is rotated by a single biaxial hinge A.

[0063] In addition, according to the example shown in Figures 1 to 5, only the second rotation center c2 of each biaxial hinge A is inclined upward so as to approach the trailing edge side frame member 11, but as another example, it is also possible to configure the first rotation center c1 to be inclined in one direction relative to the extension direction (vertical direction) of the trailing edge side frame member 11, and the second rotation center c2 to be inclined in the same direction at an angle greater than this inclination angle.

[0064] As another example, it is also possible to tilt the second rotation center c2' upward and away from the trailing edge side frame member 11, as in the fitting device 2 shown in FIG. More specifically, the fitting device 2 is the fitting device 1 in which the plurality of biaxial hinges A are each replaced with a biaxial hinge A'. The biaxial hinge A' has a second uniaxial hinge 53 attached so that the inclination direction of the second rotation center c2' is opposite to that of the second rotation center c2 in the biaxial hinge A. In this fitting device 2, similarly to the fitting device 1 described above, the rotational resistance of the fitting 20 with the second center of rotation c2' as the fulcrum is made greater than the resistance when the first center of rotation c1 is the fulcrum, thereby preventing the fitting 20 from wobbling in the thickness direction during opening and closing operations.

[0065] Furthermore, as another example, it is also possible to replace some of the multiple biaxial hinges A in the fitting device 1 with biaxial hinges A'. In this other example, the second rotation center c2 of the biaxial hinge A and the second rotation center c2' of the biaxial hinge A' are tilted in opposite directions, so a large relative tilt angle can be ensured between these two types of second rotation centers c2, c2'. Therefore, the second uniaxial hinge 53 of the biaxial hinge A and the second uniaxial hinge 53 of the biaxial hinge A' effectively restrict rotation of each other. In this other example, the inclination angle α of the second rotation centers c2, c2′ and the clearance between the shaft portion 53a1 and the bearing portion 53b1 of the second single-axis hinge 53 are appropriately set so that the rotation resistance around the two types of second rotation centers c2, c2′ does not become too large.

[0066] Furthermore, as another example, among the multiple biaxial hinges spaced apart in the vertical direction between the fitting 20 and the door trailing side frame member 11, some of the biaxial hinges (for example, the two biaxial hinges on the upper and lower end sides) can be biaxial hinges of a general structure in which the two centers of rotation are approximately parallel, and only some of the other biaxial hinges (for example, the biaxial hinge on the central side) can be biaxial hinges A (or A') in which the second center of rotation c2 (or c2') is inclined. According to this configuration, in the other part of the biaxial hinges A (or A'), it is possible to make the rotation resistance about the second rotation center c2 (or c2') as a fulcrum relatively large. In other words, compared to a typical biaxial hinge, the tilt angle of the second rotation center c2 (or c2') of the biaxial hinge A (or A') is relatively large, so that the rotation restriction effect on the second rotation center side can be stably exerted, and ultimately, the door and window 20 can be effectively prevented from wobbling in the thickness direction during opening and closing operations. In this configuration, the inclination angle of the second rotation center c2 (or c2') is appropriately set so that the rotational resistance around the second rotation center c2 (or c2') does not become too large and cause support in the opening and closing operation.

[0067] Furthermore, in the above embodiment, as a preferred example, the fitting 20 in the fully closed position (see Figure 7(b)) before reaching the water-stopping position (see Figure 7(c)) is configured to be approximately flush with the surface of the frame body 10, but as another example, it is also possible to configure the fitting 20, which protrudes slightly toward the outside beyond the surface of the frame body 10 in the fully closed position, to be approximately flush with the surface of the frame body 10 when it reaches the water-stopping position.

[0068] Furthermore, in the above embodiment, a single-wing door is configured in which a single fixture (door body) is rotated open and closed. However, as another example, it is also possible to configure a double-wing door (so-called folding door) in which the fixtures on both sides of the width are rotated open and closed, and in this case, the above-mentioned biaxial hinge A can be provided between the end of the fixture and the frame member for each of the fixtures on the left and right sides.

[0069] Furthermore, in the above embodiment, as a particularly preferred example, the fitting device 1 is configured as a waterproof door device, but the basic structure of this fitting device 1 can be applied to airtight door devices other than waterproof door devices, such as soundproof door devices. Furthermore, the basic structure of the fitting device 1 can be applied to fitting devices other than door devices, such as window devices and shoji screens that open and close by rotating the fitting.

[0070] The present invention is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present invention. [Explanation of symbols]

[0071] 1,2: Door and window equipment 10:Frame body 11: Door end frame member 20: Doors and windows 51: Link member 52: First single-axis hinge 52a: First support member 52b: First rotating member 53: Second single-axis hinge 53a: Second support member 53b: Second rotating member A, A': Two-axis hinge c1: First rotation center c2, c2': Second rotation center

Claims

1. A biaxial hinge comprising: a link member that forms a first rotation center on one end side and a second rotation center spaced apart on the other end side; a first uniaxial hinge attached to the one end side of the link member; and a second uniaxial hinge attached to the other end side of the link member, the biaxial hinge being configured to be attached across a frame member and a fitting; the first uniaxial hinge includes a first support member having a cylindrical bearing portion fixed to the one end side of the link member, and a first rotating member having a cantilever-shaped shaft portion that rotatably fits into the bearing portion of the first support member, the second uniaxial hinge includes a second support member having a cantilevered shaft portion fixed to the other end side of the link member, and a second rotating member having a cylindrical bearing portion rotatably fitted onto the shaft portion of the second support member, a biaxial hinge, wherein the shaft portion of the first uniaxial hinge and the shaft portion of the second uniaxial hinge protrude so as to narrow the gap between their free ends, and respectively constitute the first rotation center and the second rotation center that is inclined with respect to the first rotation center on an imaginary plane that includes the first rotation center.

2. A biaxial hinge as described in claim 1, characterized in that the shaft portion of the first rotating member and the shaft portion of the second rotating member are each detachable by being inserted and removed axially from the corresponding bearing portion.

3. A fitting device using a biaxial hinge, comprising: a link member which forms a first center of rotation at one end and a second center of rotation spaced apart at the other end; a first rotating member connected to the link member so as to rotate around the first center of rotation as a fulcrum; and a second rotating member connected to the link member so as to rotate around the second center of rotation as a fulcrum, wherein the second center of rotation is inclined with respect to the first center of rotation, A fitting device comprising a frame member to which the first pivoting member is fixed and a fitting fixed to the second pivoting member, wherein the fitting can be pivoted open and closed and moved in the thickness direction of the fitting.

4. A fitting device as described in claim 3, characterized in that the first rotating member is fixed to the frame member so that the first center of rotation is approximately vertical, and the second rotating member is fixed to the fitting so that the second center of rotation is inclined with respect to the first center of rotation.

5. A building and fixture device as described in claim 3 or 4, characterized in that the second center of rotation is inclined upward so as to approach the frame member.

6. A building and fixture device as described in claim 3 or 4, characterized in that the second center of rotation is tilted upward and away from the frame member.

7. A building and fixture device as described in any one of claims 3 to 6, characterized in that the biaxial hinges are provided in multiple positions along the extension direction of the frame member.

8. A fitting device described in any one of claims 3 to 7, characterized in that the fitting rotates in the closing direction and then moves in the forward direction so as to come into approximately close contact with the frame member.

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