JP2012251380A - Hinge structure for swing door - Google Patents

Abstract

A hinge structure for a hinged door capable of automatically closing the hinged door with a simple structure that only devise the structure of the hinge for fixing the hinged door is provided.
One side of a hinged door 4 is fixed to one surface of a frame 3 with two pairs of hinges 1 and 2, and the hinged door 4 is rotated around a support shaft 11 of a lower hinge 1 and a support shaft 21 of an upper hinge 2. Of the two sets of hinges 1 and 2, the upper hinge 2 fixed on the upper side of the hinged door 4 is in a state where the hinged door 4 is closed and the position of the support shaft 21 is parallel to the plane of the hinged door 4. In the y-axis direction, the distance y2 from the end 4a on the attachment side of the hinged door 4 is greater than the distance y1 from the end 4a of the support shaft 11 of the lower hinge 1 (y1 = 0 in the example of FIG. 1). It is formed to be large.
[Selection] Figure 1

Description

  The present invention relates to a hinge structure of a hinged door in which a hinged door is fixed to one surface of a frame including a pillar or the like by a hinge, and the hinged door is opened and closed around a rotation axis (support shaft) of the hinge. More specifically, the present invention relates to a hinge structure of a hinged door having a structure in which a hinged door that is opened only by a simple hinge structure is automatically closed.

  A conventional hinged door is formed in a structure that is fixed to a frame with one or a plurality of hinges and is opened and closed by rotating the hinged door around a rotation axis of the hinge. Such hinged doors are used in a wide range of fields such as general houses, offices, factories, and public toilets.

  In order to automatically close after opening such a hinged door, for example, as shown in FIG. 10, a driving device 52 is attached to the upper portion of the frame 51, and the rotation provided in the driving device 52. For example, a device is known in which one end of a telescopic or foldable arm 54 is fixed to the shaft 53, the other end is fixed to the hinged door 55, and the hinged door 55 is automatically closed by the torque of the rotating shaft 53. (For example, refer to Patent Document 1). Reference numeral 56 denotes a normal hinge. Since the hinged door 55 rotates around a support shaft having a certain length, the support shafts of the upper and lower hinges 56 are in a straight line.

JP 2008-208645 A

  As mentioned above, it is necessary to install a drive device to ensure that the door is strictly closed, such as in an office or factory, but in this case, the door is opened. In many cases, it is difficult for the weak (old people, children). Also, if it is aesthetically preferable that the door is closed when not in use at a bathroom or in a public toilet, there is no value for attaching a drive device that requires some force, and even the weak can easily open it. It is preferable that the hinged door can be closed with a simple structure.

  The present invention has been made in view of such a situation, and can automatically close the opening door with a simple structure simply by devising the structure of a hinge for fixing the opening door, and can be easily opened with a small force. It aims to provide hinge structure of hinged door that can.

  The hinge structure of the hinged door according to the present invention is a hinge structure of the hinged door that opens and closes the hinged door by fixing the one face of the hinged door to one surface of the frame with two sets of hinges and rotating the hinged door around the support shaft of the hinge. In the two sets of hinges, the position of the support shaft of the upper hinge fixed on the upper side of the hinged door from the end on the attachment side of the hinged door is in a direction parallel to the plane of the hinged door, The two sets of hinges are formed so as to be larger than the distance from the end portion of the support shaft of the lower hinge fixed at the lower side of the two sets of hinges.

  A frame means here what fixes a hinged door, and the meaning including all things which enable attachment of a hinged door, such as a pillar and other doors. Moreover, the plane of a hinged door is a plane different from the side surface of a hinged door, and means the wide surface.

  In each of the two sets of hinges, a support shaft formed on one of the two blades is formed with a projecting rod, and a portion facing the support shaft formed on the other blade has the projecting rod. It is formed with a recess to receive, is formed in a structure that supports the hinged door by abutting the tip of the support shaft and the bottom of the recess, and at least the tip of the support shaft is formed in a convex curved surface Even when the hinged door is tilted because the support shafts do not coincide with each other in the upper and lower hinge structures, it is preferable because the hinged door can be freely rotated by the point contact.

  Further, of the two sets of hinges, the distance between the support shaft of the lower hinge and the plane of the hinged door is larger than the distance of the support shaft of the upper hinge from the plane of the hinged door. This is preferable because the force for automatically closing the hinged door is further increased.

  Each of the two sets of hinges includes a support member having a support shaft and a receiving member in which a cylindrical portion for receiving the support shaft is formed, and the support member and the receiving member are provided inside the hinged door. The support member of the lower hinge has a support shaft having a tip formed in a convex curved surface, and abutting between the tip of the support shaft and the top of the cylindrical portion of the receiving member A hinged door is supported, and the upper hinge may be structured such that the support shaft and the cylindrical portion have a gap that allows the tilt of the hinged door. In other words, even in the case of a hinge structure of a gravitational structure, the hinged door can be automatically closed by offsetting the position of the support shaft with the upper and lower hinges.

  According to the hinge structure of the hinged door of the present invention, of the two hinge structures for securing the hinged door to the frame or the like, the upper hinge secured on the upper side of the hinged door has a support shaft parallel to the plane of the hinged door. In the direction, the distance from the end of the hinged door is larger than the distance of the hinged support shaft of the lower hinge that is fixed at the lower of the two hinges. Therefore, when the hinged door is opened, the bottom side of the hinged door is supported on the side close to the frame, and the upper side is supported at a position away from the frame, so that the opened hinged door has a force to close. work. As a result, whenever the hinged door is opened, a force to close the hinged door acts by a part of the gravity of the hinged door, and the door is automatically closed. As a result, like a public toilet, when the public uses and exits the toilet, the door is automatically closed without being properly closed, which is also preferable from the viewpoint of aesthetics.

  This automatically closing force forms the two sets of hinges such that the distance of the lower hinge support shaft from the plane of the hinged door is greater than the distance of the upper hinge support shaft from the plane of the hinged door. Thus, the door can be further tilted and the door can be easily closed automatically. By offsetting both the lower and upper hinges, not only can the hinged door be reliably closed at a fast speed, but also automatically when the hinged door is opened more than 90 ° (eg around 150 °). Can be closed.

  Furthermore, by supporting the hinged door with the hinge support shaft and forming the contact point on the convex curved surface, the support part that supports the hinged door is almost point contact, and even if the hinged door tilts, the hinged door rotates smoothly. Can be made.

(A) is front explanatory drawing which shows one Embodiment of the hinge structure of the hinged door of this invention, (b) is the BB cross-section explanatory drawing. It is decomposition | disassembly explanatory drawing of the lower hinge of FIG. It is explanatory drawing seen from the hinge attachment side when attaching the hinge of FIG. 2 to the frame 3 and the hinged door 4 of FIG. 1 and opening 90 degrees (a) and 180 degrees (b). It is an exploded explanatory view of the upper hinge of FIG. 1, an upper surface explanatory drawing, and CC sectional explanatory drawing of (a). It is explanatory drawing seen from the hinge attachment side when attaching the hinge of FIG. 4 to the frame 3 and the hinged door 4 of FIG. 1 and opening 90 degrees (a) and 180 degrees (b). It is the front view (a) when the hinged door is opened 90 degrees in the state of FIG. 1, and its BB cross-section explanatory drawing (b). It is explanatory drawing which exaggerated the inclination of the hinged door of Fig.6 (a), and showed the relationship of force for demonstrating the reason a hinged door closes automatically in the state of Fig.6 (a). It is front explanatory drawing (a) and upper surface explanatory drawing (b) which show other embodiment of the hinge structure of the hinged door of this invention. FIG. 9 is an overall perspective view of the upper hinge and the lower hinge of FIG. 8. It is explanatory drawing of the structural example which closes the conventional hinged door automatically.

  Next, the hinge structure of the hinged door of the present invention will be described with reference to the drawings. The hinge structure of the hinged door according to the present invention is the same as the front explanatory view and the sectional explanation when the hinged door is opened 90 degrees in FIG. As shown in the figure, one surface of the hinged door 4 is fixed to one surface of the frame 3 with two sets of hinges 1 and 2, and the hinged door 4 is rotated around the support shaft 11 of the lower hinge 1 and the support shaft 21 of the upper hinge 2. It is structured to rotate. Of the two sets of hinges 1 and 2, the upper hinge 2 fixed on the upper side of the hinged door 4 is in a state where the hinged door 4 is closed (the state of FIG. 1), and the position of the support shaft 21 is the plane of the hinged door 4. Is a distance y2 from the end 4a on the mounting side of the hinged door 4 in the y-axis direction parallel to the distance y1 from the end 4a of the support shaft 11 of the lower hinge 1 (y1 = 0 in the example of FIG. 1). (See FIG. 1A). In FIG. 1, 5 is a handle for opening and closing the hinged door 4. However, in the case of a simple structure, it may be omitted, and when provided, it has a normal simple lock mechanism. However, it is not particularly limited. Further, as shown in FIG. 1, with the hinged door 4 closed, the direction perpendicular to the plane of the hinged door 4 is the x axis, the direction parallel to the plane of the hinged door 4 is the y axis, and the height direction of the hinged door 4 is the z axis. The following explanation will be given.

  In the example shown in FIG. 1, the distance y2 in the y-axis direction of the support shaft 21 of the upper hinge 1 is not only larger than the offset y1 in the y-axis direction of the lower hinge 1, but the lower hinge 2 The position of the support shaft 11 is 2 so that the protrusion distance x1 in the x-axis direction perpendicular to the plane of the hinged door 4 is larger than the protrusion distance x2 of the upper hinge 2 in the x-axis direction (see FIG. 1B). A pair of hinges 1, 2 is formed. However, as will be described later, both the projection distance x1 of the support shaft 11 of the lower hinge 1 and the deviation (offset) y2 of the upper hinge 2 in the direction parallel to the hinged door 4 are increased. The hinged door 4 can be automatically closed simply by making the offset y2 in the y-axis direction larger than y1.

  The lower hinge 1 has a structure, for example, as shown in an exploded front view in FIG. 2 (a) and a top view in FIG. 2 (b). That is, the first blade member 12 is formed by attaching a mounting portion 12a to be attached to the frame 3 or the like, an extending portion 12b extending by about half of its height, and a tip portion thereof being rounded into a cylindrical shape. The support shaft 11 is fixed to the inside of the cylindrical portion 12c. The extending portion 12b is formed such that the distance to the center of the support shaft is a desired length x, for example, in order to cause the support shaft 11 to protrude from the plane of the hinged door 4. Although it may be a spherical surface, it is not limited to a spherical surface, and any structure that can contact the other party with a small area such as point contact may be used. As shown in FIG. 2A, the support shaft 11 is formed with a convex curved surface 11a at the tip. The second blade member 13 is also formed in the same structure, and is formed by, for example, an attachment portion 13a that is fixed to the side surface of the hinged door 4, an extension portion 13b, and a cylindrical portion 13c that is formed at the tip portion thereof. A stopper portion 11b is formed in 13c. A first blade member fixed to the frame body 3 with the hinged door 4 fixed to the second blade member 13 by fitting a recess formed by the cylindrical portion 13 c and the stopper portion 11 b to the support shaft 11. The twelve support shafts 11 can be rotatably supported. That is, a space in which the hinged door 4 can tilt is formed between the outer diameter of the support shaft 11 and the inner diameter of the recess. In addition, 12d and 13d are attachment holes for fixing the first blade member 12 and the like to the frame body 3 and the like with screws 12e and 13e.

  If the first blade member 12 and the second blade member 13 are attached to the front surface of the frame 3 and the hinged door 4 instead of being attached to the surface where the frame 3 and the hinged door 4 face each other, for example, the extension The portions 12b and 13b are not flush with the attachment portions 12a and 22a, and the extending portions can be formed by bending 90 °. In the example shown in FIG. 1, the center position of the support shaft 11 is offset from the plane of the hinged door 4 by a distance x1. In addition, even when hinges 1 and 2 are attached to either surface, a recess corresponding to the shape of hinges 1 and 2 is formed on the attachment surface, and hinges 1 and 2 are formed on the surface of frame 3 or hinged door 4. It is possible to prevent the blade members 12 and 22 from protruding.

  By fitting the cylindrical portion 13c of the second blade member 13 to the support shaft 11 of the first blade member 12, the convex surface 11a of the support shaft 11 makes the second blade member 13, that is, the hinged door 4 almost point contact. The hinged door 4 can be freely opened and closed while being supported. In addition, although the stopper part 11b formed in the cylindrical part 13c of the 2nd blade | wing member 13 is planar shape in the example shown by FIG. 2, other shapes, such as a convex curved surface and a concave curved surface, may be sufficient. As described above, a gap of about 0.5 to 1 mm is formed between the inner diameter of the cylindrical portion 13c and the maximum diameter portion of the convex portion of the support shaft 11, and thus the cylindrical shape of the first blade member 12 is formed. Even if the cores of the portion 12c and the cylindrical portion 13c of the second wing member 13 are inclined, they can rotate freely while being reliably supported.

  The first blade member 12 is fixed to the inner wall of the frame 3 (the surface facing the hinged door) via a mounting hole 12d with screws 12e, and the second blade member 13 is fixed to the side surface of the hinged door 4 (opposed to the frame 3). And the cylindrical portion 13c of the second blade member 13 is fitted to the support shaft 11 of the first blade member 12, and the hinged door 4 is rotated by 90 °. 3 (a), and the figure after 180 ° rotation is shown in FIG. 3 (b), from the surface of the frame 3 (same as the surface of the hinged door 4). The hinged door 4 is formed so as to rotate around the position of a certain distance x1. That is, it is formed so as to rotate around the joint point with the support shaft 11 at a position protruding forward from the flat portion of the hinged door 4 by a distance of x1. Therefore, for example, as shown in FIG. 3A, when the hinged door 4 is rotated by 90 °, the surface of the frame 3 and the end of the hinged door 4 (at the height of the support point of the convex curved surface 11a of the support shaft 11). The distance to the end) is x3.

  The upper hinge 2 is composed of a third blade member 22 and a fourth blade member 23, as shown in FIGS. 4 to 5 in the same manner as FIGS. As with the single blade member 12, the mounting portion 22a, the extending portion 22b, the cylindrical portion 22c, and the mounting hole 22d are configured, and the support shaft 21 is fixed in the cylindrical portion 22c. Similarly to the support shaft 11 described above, the support shaft 21 is also formed with a convex curved surface 21a. The first blade member 12 is different from the first blade member 12 in that the extending portion 22b extends in a direction bent by 90 ° with respect to the surface of the mounting portion 22a, and FIG. As shown in the cross-sectional explanatory view, the extending portion 22b above the cylindrical portion 22c is tapered. This is because the hinge 2 is formed in a structure that is attached to the surface of the frame 3 that faces the hinged door 4, and the support shaft 21 is offset from the end of the hinged door 4 toward the center side. is there. Further, the extension portion 22b is formed in a tapered shape so that it does not need to be tapered if the normal hinged door 4 is automatically opened. This is because the inclination is not the direction in which the inclination is closed but in the opposite direction, so that the inclination can be allowed. If the third blade member 22 and the fourth blade member 23 are attached to the front surface of the frame body 3 and the hinged door 4 instead of being attached to the surface where the frame body 3 and the hinged door 4 face each other, for example, the extension It is not necessary to bend the portions 22b and 23b by 90 °, and it is also possible to form an extending portion while maintaining a flat surface. In the example shown in FIG. 4, the center position of the support shaft 21 is offset from the end of the hinged door 4 by a distance y2.

  Similar to the structure of the lower hinge 1 described above, by fitting the cylindrical portion 23c of the fourth blade member 23 to the support shaft 21 of the third blade member 22, the fourth blade The hinged door 4 can be freely opened and closed while the member 23, that is, the hinged door 4 is supported by substantially point contact. The stopper portion 21b formed in the cylindrical portion 23c of the fourth blade member 23 is planar in the example shown in FIG. 4, but, like the lower hinge 1, other stoppers such as a convex curved surface and a concave curved surface are used. It does not matter in shape. The inner diameter of the cylindrical portion 23c and the maximum diameter portion of the convex portion of the support shaft 21 have a clearance similar to that of the lower hinge 1, and can rotate by making point contact even if the hinged door 4 is tilted. Are the same.

  The third blade member 22 is fixed to the inner wall of the frame body 3 (the surface facing the hinged door) via a mounting hole 22d with a screw 22e, and the fourth blade member 23 is opposed to the side surface of the hinged door 4 (opposed to the frame member 3). FIG. 5 shows a state in which the hinged door 4 is rotated by 90 ° in a state in which the cylindrical portion 23c of the fourth blade member 23 is fitted to the support shaft 21 of the third blade member 22 with the screw 23e fixed to the surface). As shown in FIG. 5A and FIG. 5B, respectively, when the hinged door 4 is opened by 90 °, the end of the hinged door 4 in the x-axis direction is shown in FIG. (The end of the support shaft 21 at the position serving as the fulcrum of the convex curved surface 21a) is −x4 from the inner wall of the frame 3 (the x coordinate of the end of the hinged door 4 with respect to x3 described above is To indicate that it is in the opposite direction relative to the surface) There.

  The lower hinge 1 and the upper hinge 2 of the hinged door 4 shown in FIG. 1 are each formed in the above-described structure. FIG. 6 shows a front view and a BB cross-sectional view when the hinged door 4 is opened 90 degrees in this state. That is, in this state, as shown in FIG. 6B, the lower hinge 1 has a distance x3 in the x-axis direction between the frame 3 and the end of the hinged door 4 when the hinged door 4 is rotated by 90 °. Is larger than x = 0 when the hinged door 4 is closed. Further, the distance in the x-axis direction of the upper hinge 2 is −x4, the lower side of the hinged door 4 is offset to the positive side of the x-axis, and the upper side of the hinged door 4 is offset to the negative side of the x-axis. 4 is supported by the convex curved surfaces 11a and 21a of the support shafts 11 and 21 while a force to fall to the negative side of the x-axis is working. Further, the distance y4 between the frame body 3 in the y-axis direction and the end of the hinged door 4 is larger than y3 as shown in FIG. 6A, and an inclination in the direction in which the hinged door 4 is closed is generated.

  As a result, the inclination of only the portion of the hinged door 4 in the state of FIG. 6A is exaggerated and the center of gravity W of the hinged door 4 has a component F1 parallel to the surface of the hinged door 4, as shown in FIG. The force F2 in the direction perpendicular to the surface of the hinged door 4 is always working. Therefore, when the hinged door 4 is open, a force F2 that always tries to close the hinged door 4 acts on the hinged door 4, and the hinged door 4 can be automatically closed.

  As a specific example, for example, the hinged door 4 shown in FIG. 1 has a vertical length of 1420 mm and a horizontal width of 634 mm, and the lower hinge 1 has x1 = 21 mm, x2 = 14 mm, y1 = 0, upper side The hinge 2 was formed with y2 = 20 mm. With this dimension, when the hinged door 4 was opened 90 ° (in the state shown in FIG. 4), x3 = 24 mm, −x4 = −6 mm, y3 = 22 mm, and y4 = 33 mm.

  In the above embodiment, an example is shown in which the support point of the upper hinge 2 is offset in the y-axis direction and the support point of the lower hinge 1 is also offset in the x-axis direction. There is no. That is, for example, when the upper hinge 2 is only offset in the y-axis direction and the lower hinge 1 is a normal hinge that does not offset (even in this case, the fulcrum by the support shaft 11 is point contact of the tip). However, since the fulcrum of the upper hinge 2 is offset in the y-axis direction, as the hinged door 4, a force is exerted to incline toward the positive side of the y-axis, while the end of the hinged door 4 is hinged 1. Since the force is fixed at 2, the force in the y-axis direction becomes a rotational force and acts to automatically close.

  For example, as shown in FIG. 1, by offsetting both the lower hinge 1 and the upper hinge 2, the rotational force is large. With the above-described dimensions, the hinged door 4 is opened at 90 ° or more, and 130 ° to Even when opened about 150 °, it closed automatically.

  In the above-described example, the hinge structure is an example of a structure in which two blade members are coupled by a support shaft. For example, a support member having a support shaft inside the hinged door from the upper end or the lower end of the hinged door 4; Even when using a gravity-type hinge that is concentrically provided inside a hinged door or the like that is configured with a receiving member that holds the support member, similarly, the support shaft of the upper hinge is more than the position of the support shaft of the lower hinge. Similarly, the hinged door can be automatically closed by offsetting in the axial direction. Examples are shown in FIGS.

  FIG. 8 (a) is a front explanatory view similar to FIG. 1 (a), except that the frame is omitted and the hinge part is a partial cross-sectional view, and FIG. 8 (b) is a top view thereof. It is explanatory drawing. The lower hinge 6 is composed of a lower support member 62 and a lower receiving member 63 as shown in the lower side of FIG. 9, and a support shaft 61 attached to the lower support member 62 has The structure is supported by the stopper portion 63b of the cylindrical portion 63c of the lower receiving member 63, and the opening door is supported by the support shaft 61 via the lower receiving member 63 attached to the hole formed in the bottom surface of the opening door 4. It has become. Similarly, the upper hinge 7 is constituted by a support shaft 71 of the upper support member 72 and an upper receiving member 73 formed in a cylindrical shape for receiving the support shaft 71, and is fixed to the hinged door 4. The hinged door 4 is attached by holding the support shaft 71 of the upper support member 72 in the cylindrical portion 73 c of the 73 so as not to come out, and can be opened and closed by the rotation of the hinged door 4.

  The lower hinge 6 has a structure as shown in an overall perspective view in FIG. 9, for example. That is, the lower support member 62 includes an attachment portion 62a that is fixed to a frame (not shown), an extension portion 62b that is bent and extended 90 ° therefrom, and a support shaft 61 that is formed at the tip portion (see FIG. 8). The support shaft 61 has a tip portion formed in a convex curved surface, for example, like the support shaft 11 shown in FIG. On the other hand, the lower receiving member 63 is formed of an attachment portion 63a that is fixed to the hinged door 4 and a cylindrical portion 63c that is formed at the tip thereof, and the cylindrical portion 63c is shown, for example, in FIG. Thus, the stopper portion 63b is formed. The stopper portion 63b is not limited to a planar shape, and may have other shapes such as a convex curved surface and a concave curved surface. The recessed portion formed by the cylindrical portion 63c and the stopper portion 63b is fitted to the support shaft, so that the hinged door 4 fixed to the lower receiving member 63 is supported by the support shaft 61 of the lower support member 62 fixed to the frame or the like. It has a structure that can be supported rotatably. In addition, 62d and 63d are attachment holes for fixing the lower support member 62, the lower receiving member 63, and the like to the frame body, the hinged door 4, and the like with screws. There is a gap between the inner diameter of the cylindrical portion 63c and the maximum diameter portion of the convex portion of the support shaft 61 formed on the lower support member 62, as in the example shown in FIG. It has a structure that can rotate by making point contact.

  Further, the upper hinge 7 is formed of an upper support member 72 and an upper receiving member 73, as shown in an overall perspective view in the upper part of FIG. 9, for example, and the upper support member 72 is attached to a frame or the like (not shown). A mounting portion 72a to be attached, an extending portion 72b extending in a structure bent by 90 ° therefrom, and a support shaft 71 (see FIG. 8) formed at the tip portion thereof, are formed in the mounting portion 72a. Is formed. On the other hand, the upper receiving member 73 is formed by an attachment portion 73a that is fixed to the hinged door 4 and a cylindrical portion 73c that is formed at the tip portion thereof, and an attachment hole 73d is formed in the attachment portion 73a. The inner diameter of the cylindrical portion 73c and the support shaft 71 formed on the upper support member 72 are for holding the hinged door 4 and the like to which the receiving member 73 is fixed so that the shape of the tip is particularly good. It is not restricted and is formed so as to have a clearance that allows the tilt of the hinged door 4 to be allowed, for example, a clearance of about 1 mm. In the example shown in FIG. 8, a gap is formed between the upper support member 72 and the upper receiving member 73, but the hinged door 4 is not a structure that fits into the frame like a toilet door, for example. The example shows a case where there is a gap between the upper portion of the hinged door 4 and the frame. When the hinged door 4 is provided so as to be fitted in the frame, this gap is eliminated.

  The lower receiving member 63 and the upper receiving member 73 of the lower hinge 6 and the upper hinge 7 are formed from the bottom surface and the upper surface of the hinged door 4 at the center in the thickness direction of the hinged door 4 and from the end of the hinged door 4. Both hinges 6 and 7 are attached so that the position y6 of the upper receiving member 73 is larger than the position y5 of the lower receiving member 63. As a result, as in the example shown in FIGS. 4 to 5, when the hinged door 4 is opened, a force that tends to fall in the positive direction of the y-axis acts and the hinged door 4 is automatically closed.

  In a specific example, the position of the support shaft 61 of the lower hinge 6 is a position of y5 = 34 mm from the frame, the outer diameter of the receiving member 63 of the lower hinge 6 is 21 mm, and the height is 43 mm. The position of the support shaft 71 of the hinge 7 is such that the distance from the frame is y6 = 65 mm or 115 mm, and the outer shape of the receiving member 73 of the upper hinge 7 is 12 mm. The hinged door closed. In addition, when y6 = 115 mm, the closing force was stronger and faster than when y6 = 65 mm.

  In the hinge structure of the present invention, as shown in FIGS. 2 to 5 described above, two blades 12 and 13 are coupled by a support shaft portion, the support shaft 11 of one blade 12 is formed by a projecting rod, and the other The blade 13 of the support shaft 11 is formed as a recess for receiving the projecting rod of the support shaft 11 and supports the hinged door fixed to the other blade by abutting against the bottom of the support shaft 11 (convex curved surface 11a). And at least the tip of the support shaft is formed in a convex curved surface. By adopting this structure, even if the door is supported in an inclined state, it can be supported by point contact, so that the rotation can be performed freely.

DESCRIPTION OF SYMBOLS 1 Lower hinge 2 Upper hinge 3 Frame 4 Opening door 6 Lower hinge 7 Upper hinge 11 Support shaft 11a Convex curved surface 12 First blade member 12b Extension part 13 Second blade member 13b Extension part 21 Support shaft 21a Convex shape Curved surface 22 Third blade member 22b Extension portion 23 Fourth blade member 23b Extension portion 62 Lower support member 63 Lower support member 72 Upper support member 73 Upper support member

Claims (4)

A hinge structure of a hinged door that opens and closes the hinged door by fixing one surface of the hinged door to one surface of the frame with two pairs of hinges and rotating the hinged door around a support shaft of the hinge. Among them, the distance of the position of the support shaft of the upper hinge fixed on the upper side of the hinged door from the end portion on the attachment side of the hinged door is in the direction parallel to the plane of the hinged door, on the lower side of the two sets of hinges. A hinge structure of a hinged door in which the two sets of hinges are formed so as to be larger than the distance from the end of the support shaft of the lower hinge to be fixed. In each of the two sets of hinges, a support shaft formed on one of the two blades is formed with a projecting rod, and a portion facing the support shaft formed on the other blade has the projecting rod. It is formed with a recess to receive, and is formed in a structure that supports the hinged door by abutting the tip of the support shaft and the bottom of the recess, and at least the tip of the support shaft is formed in a convex curved surface The hinge structure of the hinged door according to claim 1. Of the two sets of hinges, the distance between the support shaft of the lower hinge and the plane of the hinged door is greater than the distance of the support shaft of the upper hinge from the plane of the hinged door. The hinge structure of a hinged door according to claim 1 or 2, wherein the hinge is formed. Each of the two sets of hinges includes a support member having a support shaft and a receiving member in which a cylindrical portion for receiving the support shaft is formed, and the support member and the receiving member are provided inside the hinged door. The support member of the lower hinge has a support shaft having a tip formed in a convex curved surface, and abutting between the tip of the support shaft and the top of the cylindrical portion of the receiving member The hinge structure of the hinged door according to claim 1, wherein the hinged door is supported, and the upper hinge is formed such that the support shaft and the cylindrical portion have a gap that allows the inclination of the hinged door.

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