JP2016035172A - hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge capable of easily positioning in a depth direction with respect to various kinds of door frames.SOLUTION: A hinge 1 includes: a door side blade 10 which is fixed to a door panel 6; and a frame side blade 14 which is rotatably connected to the door side blade and is fixed to a door frame 2. In an end part of the frame side blade at the side connected to the door side blade, positioning projections 18 and 19 protruding in a thickness direction of the door frame are formed, which are abutted on a face 4 of the door frame in a depth direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hinge that rotatably connects a door plate to a door frame.

2. Description of the Related Art A hinge that connects a door plate such as a hinged door to a door frame so as to be rotatable is known.
Such a hinge has a configuration in which a frame-side slat fixed to the door frame side is fitted into a recess-shaped notch provided in the door frame and positioned to be fixed to the door frame ( For example, see Patent Document 1 below).

Registered Utility Model No. 3014670

  However, when providing a notch in the door frame as described above, it is necessary to make the notch according to the shape of the frame-side blade, and further improvement is desired. In addition, for example, when the door plate is replaced for redesign or refurbishment, or when the door frame is covered with a cover, it may be necessary to newly provide a notch on the door frame side at the construction site. .

  This invention is made | formed in view of the said situation, and it aims at providing the hinge which can perform positioning of the prospective direction with respect to various door frames easily.

  In order to achieve the above object, a hinge according to the present invention includes a door-side blade portion fixed to a door plate, and a frame-side blade portion that is rotatably connected to the door-side blade portion and fixed to the door frame. And projecting in the direction along the thickness direction of the door frame at the end of the frame-side blade portion on the connection side with the door-side blade portion. A positioning projection piece to be in contact is provided.

  Since the hinge according to the present invention is configured as described above, positioning in the expected direction with respect to various door frames can be easily performed.

(A), (b) shows typically an example of the hinge which concerns on one Embodiment of this invention, (a) is a schematic plan view of the hinge, (b) is the schematic one of the hinge. It is a side view. (A) is a schematic exploded one side view of the hinge, and (b) is a schematic exploded other side view in which a part of the hinge is omitted. (A)-(c) is a partially broken schematic cross section corresponding to the XX arrow in FIG.1 (b) which shows an example of the construction procedure of the hinge typically.

Embodiments of the present invention will be described below with reference to the drawings.
In some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
Moreover, in the following embodiment, directions, such as an up-down direction, are demonstrated on the basis of the state which constructed the hinge which concerns on this embodiment.

1-3 is a figure which shows typically an example of the hinge which concerns on this embodiment.
As shown in FIG. 3C, the hinge 1 according to this embodiment is configured to connect the door plate 6 to the door frame 2 so as to be rotatable (openable and closable). The hinge 1 is provided at a plurality of locations at appropriate intervals along the vertical direction.
As shown in FIG. 3, the vertical frame 2 as a door frame to which the hinge 1 is attached has a frame material thickness direction (finding direction) one side so as to partition an opening such as an entrance / exit provided in the wall body. The prospective surface facing the opposite entrance / exit side is attached to the frame base along an appropriate frame base. In the illustrated example, the vertical frame 2 is a fixed frame having a substantially rectangular shape in cross section. Moreover, the example which attached this vertical frame 2 so that what is called a dust part may be formed in a prospective direction (direction along a wall thickness direction) is shown. In addition, the corners of the vertical surface 2 facing the entrance and exit sides of the vertical frame 2 and the facing surface 4 facing the front side are assumed to be right-angled without chamfered portions or the like.

Moreover, the example which provided the elongate door stop member 5 along the longitudinal direction of the vertical frame 2 in the prospective surface 3 side facing the entrance / exit side of the vertical frame 2 is shown. In the example shown in the figure, the door stop member 5 is provided in the center portion in the expected direction on the expected surface 3 side of the vertical frame 2.
The hinge 1 may be attached to the vertical frame 2 in which the cut-out hinge mounting recess is not provided in the prospective surface 3 as shown in the figure. For example, the surface of the existing vertical frame is for refurbishment or the like. A vertical frame covered with a cover material may be used.
The door plate 6 has a substantially rectangular flat plate shape, and is a hinged door in the illustrated example. A hinge 1 is attached to a suspension base side end (door bottom side end) on one side of the door plate 6 in the door width direction. The door plate 6 may be provided with a notch-shaped hinge mounting recess on the end surface on the hanging base side.

As shown in FIGS. 1 and 3C, the hinge 1 according to the present embodiment is connected to the door-side blade portion 10 fixed to the door plate 6 and is rotatably connected to the door-side blade portion 10. A frame-side blade portion 14 fixed to the vertical frame 2.
The hinge 1 is configured to connect the door-side blade portion 10 and the frame-side blade portion 14 so as to be rotatable around a shaft portion 13 serving as a rotation center. Moreover, the hinge 1 is arrange | positioned along the axial direction of the axial part 13 along an up-down direction.
Moreover, in this embodiment, this hinge 1 is the cylindrical shape which receives the axial part 13 which becomes a mutual rotation center, and this axial part 13 in the edge part of each connection side of the door side blade | wing part 10 and the frame side blade | wing part 14. The cylindrical portions 12 and 16 including the bearing portion 16 are provided.
Moreover, in this embodiment, it is set as the structure which can connect the door side blade | wing part 10 with respect to the frame side blade | wing part 14 of the state fixed to the vertical frame 2. As shown in FIG.

The door-side blade portion 10 is formed into a flat plate shape, and includes a flat plate-like portion 11 that is fixed to the suspension-side end surface of the door plate 6 with the thickness direction along the door width direction of the door plate 6. The flat plate portion 11 has a substantially rectangular shape when viewed in the thickness direction, and has a vertically long shape in the illustrated example.
The flat plate portion 11 is provided with a stopper insertion hole 11a through which a stopper 7 such as a screw for fixing the door blade 10 to the door plate 6 is inserted. In the present embodiment, the plate-like portion 11 is provided with a plurality of stopper insertion holes 11a, 11a, 11a, and 11a at intervals in the vertical direction and the direction along the door thickness direction. In the illustrated example, three stopper insertion holes 11a, 11a, and 11a are provided at intervals along the vertical direction on the shaft side end portion side that is an end portion on the connection side with the frame side blade portion 14, An example is shown in which one stopper insertion hole 11a is provided on the side opposite to the end that is the end on the side different from the end. Further, in the illustrated example, the stopper insertion hole 11a on the opposite end side is shown as an elongated hole having a long diameter in the direction along the door thickness direction.

Note that the number, position, and shape of the stopper insertion holes 11a are not limited to the illustrated example, and can be appropriately modified.
Further, with the door-side blade portion 10 attached to the door plate 6, the door-side blade portion 10 can be adjusted relative to the door plate 6 in both the door thickness direction and the door width direction or in one direction by an appropriate screw operation or the like. A configuration may be adopted.
Moreover, you may provide the cover material which covers the surface side of the flat-shaped part 11 in the door side blade | wing part 10. FIG.

In addition, a columnar portion 12 is provided at the axial end of the flat plate portion 11. The cylindrical portion 12 is provided integrally with the flat plate-like portion 11 so as to extend from the upper half portion of the flat plate-like portion 11, and is provided coaxially with the shaft portion 13 of the hinge 1. Yes.
Further, as shown in FIG. 1A, the cylindrical portion 12 has a diameter (outer diameter) larger than the thickness dimension of the flat plate portion 11, and the cylindrical portion 12 has a thickness in the center in the thickness direction of the flat plate portion 11. The shaft center is configured to be substantially matched in the thickness direction of the flat plate portion 11. That is, the columnar portion 12 is shaped so as to protrude on both sides in the thickness direction from both side surfaces in the thickness direction of the flat plate-like portion 11.
Moreover, in this embodiment, this cylindrical part 12 is provided over the whole up-down direction of the upper half side part of the flat plate-shaped part 11, and it is made to protrude toward the downward side from the lower end of this cylindrical part 12. The shaft portion 13 is provided.

The shaft portion 13 has a smaller diameter than the columnar portion 12. Further, the shaft portion 13 is provided so that a gap is formed between the shaft portion end surface of the lower half side portion of the flat plate portion 11. Further, in the illustrated example, the shaft portion 13 is provided over the whole of the lower half side portion of the flat plate-like portion 11 in the vertical direction, and the lower end portion serving as the tip portion in the protruding direction is tapered.
In the illustrated example, an example in which a ring-shaped buffer member is provided at the base end portion of the shaft portion 13 is shown.
In addition, the shaft portion 13 may be configured to be able to appear and retract with respect to the columnar portion 12.
Moreover, it is good also as a structure where position adjustment to the up-down direction of the door side blade | wing part 10 with respect to the frame side blade | wing part 14 was enabled by the appropriate screw operation etc. in the state connected with the frame side blade | wing part 14. FIG.

The frame-side blade portion 14 has a flat plate shape, and includes a flat plate-like portion 15 that is fixed to the prospective surface 3 of the vertical frame 2 with its thickness direction along the opening width direction of the entrance / exit. The flat plate-like portion 15 has a substantially rectangular shape when viewed in the thickness direction, and has a vertically long shape in the illustrated example.
The flat plate-like portion 15 is provided with a stopper insertion hole 15a through which the stopper 7 for fixing the frame side blade portion 14 to the vertical frame 2 is inserted. In the present embodiment, the flat plate-like portion 15 is provided with a plurality of stopper insertion holes 15a, 15a, 15a, 15a, 15a at intervals in the vertical direction and the direction along the expectation direction. In the illustrated example, two stopper insertion holes 15a and 15a are provided at intervals along the vertical direction on the side of the shaft side which is the end of the connection side with the door-side blade portion 10, and the shaft side end portion is provided. 3 shows an example in which three stopper insertion holes 15a, 15a, 15a are provided on the side opposite to the axial end, which is the end on the different side.

In the illustrated example, the stopper insertion holes 15a, 15a, 15a on the side opposite to the axial side are viewed in the thickness direction of the plate-like portion 15 with the frame-side blade portion 14 fixed to the vertical frame 2, The example which provided so that it might become a position which overlaps wall bases, such as a stud and steel materials (stud), is shown. Further, in the illustrated example, the stopper insertion holes 15a, 15a, 15a on the opposite end side are provided with larger diameters than the stopper insertion holes 15a, 15a on the shaft end part side. With such a configuration, it is possible to fix the stopper 7 having a relatively large nominal diameter and a long axis shape to the wall base.
The number, position, and shape of the fastener insertion hole 15a are not limited to the illustrated example, and can be appropriately modified.

Further, a cylindrical bearing portion 16 as a columnar portion is provided at the axial end portion of the flat plate-like portion 15. The cylindrical bearing portion 16 is provided integrally with the flat plate-like portion 15 so as to extend from the lower half side portion of the flat plate-like portion 15 in substantially the same manner as the cylindrical portion 12 of the door-side blade portion 10. Are provided coaxially with the shaft portion 13 of the hinge 1.
Further, as shown in FIG. 1A, the cylindrical bearing portion 16 has a diameter (outer diameter) larger than the thickness dimension of the flat plate portion 15, and is centered in the thickness direction of the flat plate portion 15. The axial center of the flat plate-like portion 15 is generally matched in the thickness direction. That is, the cylindrical bearing portion 16 is shaped so as to protrude to both sides in the thickness direction from both side surfaces in the thickness direction of the flat plate-like portion 15.

In addition, the cylindrical bearing portion 16 is provided with a bearing hole 17 that opens at least upward so that the shaft portion 13 of the door-side blade portion 10 can be received. With such a configuration, the shaft portion 13 of the door side blade portion 10 fixed to the door plate 6 is fitted into the cylindrical bearing portion 16 of the frame side blade portion 14 fixed to the vertical frame 2. The door plate 6 can be suspended from the vertical frame 2 and the workability of hanging the door plate 6 can be improved.
In the present embodiment, the bearing holes 17 are open on both the upper and lower sides so as to penetrate the cylindrical bearing portion 16. With such a configuration, the shaft portion 13 that can be freely moved in and out of the cylindrical portion 12 is pushed into the cylindrical portion 12 by being pushed in from the lower end opening of the cylindrical bearing portion 16 using an appropriate jig. It is also possible to detach the shaft portion 13 from the cylindrical bearing portion 16.

Moreover, in this embodiment, this cylindrical bearing part 16 is provided over the whole up-down direction of the lower half side part of the flat plate-shaped part 15, and is made into the same diameter as the cylindrical part 12 of the door side blade | wing part 10. FIG. . That is, in a state where the door-side blade portion 10 and the frame-side blade portion 14 are connected, as shown in FIG. 1, a circle extending vertically between the flat plate-like portions 11 and 15 in the entire vertical direction. The columnar portions 12 and 16 are provided in a series.
In addition, between the axial side end surface of the upper half side part of the flat plate-like portion 15 of the frame-side blade portion 14 and the columnar portion 12 of the door-side blade portion 10, and the lower half of the flat plate-like portion 11 of the door-side blade portion 10. An appropriate clearance is provided between the shaft-side end face of the side portion and the cylindrical bearing portion 16 of the frame-side blade portion 14.

Further, as shown in FIGS. 1 and 2, the shaft side end portion of the frame side blade portion 14 protrudes in the direction along the thickness direction of the vertical frame 2, and abuts against the finding surface 4 of the vertical frame 2. Positioning protrusions 18 and 19 are provided.
In the present embodiment, a plurality of positioning protrusions 18 and 19 are provided at the axial end of the frame-side blade portion 14 with an interval in the axial direction. The surfaces of the positioning protrusions 18 and 19 that face the finding surface 4 of the vertical frame 2 are coplanar with each other. In the present embodiment, the positioning protrusions 18 and 19 have substantially the same configuration.
These positioning protrusions 18 and 19 protrude along the thickness direction of the flat plate portion 15 from one surface in the thickness direction facing the prospective surface 3 of the vertical frame 2 at the axial end of the flat plate portion 15. Is provided.

In the present embodiment, the positioning protrusions 18 and 19 are provided so as to be shielded by the cylindrical portions 12 and 16 when viewed in the expected direction. In other words, the protruding dimension of the positioning protrusions 18 and 19 from the one surface in the thickness direction of the flat plate portion 15 is the same as the thickness of the flat plate portion 15 from the one surface in the thickness direction of the flat plate portion 15 in the columnar portions 12 and 16. It is below the dimension along the vertical direction.
The projecting dimensions of the positioning protrusions 18 and 19 may be appropriate dimensions depending on the outer diameter of the cylindrical portions 12 and 16 and from the viewpoint of appearance and positioning, for example, 1 mm to 10 mm. About, Preferably, it is good also as about 2 mm-5 mm.
Further, the thickness dimension of the positioning protrusions 18 and 19 (dimension along the expected direction) may be an appropriate dimension from the viewpoint of strength or the like. In this embodiment, the thickness dimension is the same as the thickness dimension of the flat plate portion 15. Dimension.

Further, these positioning protrusions 18 and 19 may be provided so that the axial end surface (of the upper half side portion) of the flat plate-like portion 15 and one surface in the thickness direction are flush with each other. These positioning protrusions 18 and 19 are provided in a portion slightly offset from the end surface on the shaft side toward the end on the side opposite to the shaft. The dimension along the expectation direction from the axial end surface of the flat plate-like portion 15 to the positioning protrusions 18 and 19 is appropriately determined from the viewpoint of reducing the projection dimension of the hinge 1 itself from the finding surface 4 of the vertical frame 2. For example, about 1 mm to 10 mm, preferably about 2 mm to 5 mm.
Further, in the illustrated example, the dimension along the expected direction from the opposite end surface of the flat plate portion 15 to the positioning protrusions 18 and 19 is set in the expected direction from the finding surface 4 of the vertical frame 2 to the door stop member 5. Although an example in which the dimension is substantially the same as the dimension along is shown, it may be a dimension smaller than this.

Further, the dimension along the vertical direction of the positioning protrusions 18 and 19 may be an appropriate dimension from the same viewpoint as described above.
In this embodiment, it is set as the structure which provided the single positioning protrusion 18 and 19 in each of the upper half side site | part and lower half side site | part of the flat plate-shaped part 15, and the upper and lower sides in each of an upper half side site | part and a lower half side site | part The positioning protrusions 18 and 19 are provided in the middle of the direction. In the example shown in the figure, the positioning protrusions 18 and 19 are provided at substantially the center in the vertical direction in each of the upper half portion and the lower half portion. Further, in the illustrated example, the dimension along the vertical direction of the positioning protrusions 18 and 19 is shown as an example that is about 1/5 of the dimension along the vertical direction of each half side portion of the flat plate-like portion 15. .

In the present embodiment, the upper positioning protrusion 18 of the upper half portion of the flat plate portion 15 is provided in a bent shape, and the lower half portion of the flat plate portion 15, that is, the lower portion adjacent to the cylindrical bearing portion 16 is provided. The side positioning protrusion 19 is configured to be cut and raised. With such a configuration, for example, the upper and lower positioning protrusions 18 and 19 can be provided more efficiently than those provided in an attached shape by casting or welding.
In the illustrated example, two cuts are provided in the direction along the expected direction from the axial end surface of the upper half side portion of the flat plate-like portion 15, and the upper positioning protrusion 18 is provided by bending the portion between these cuts. ing. With such a configuration, the upper positioning protrusion is more efficiently compared with a structure in which a portion extending from the axial end surface of the upper half portion of the flat plate portion 15 is bent and a positioning protrusion is provided. A piece 18 can be provided.
Further, in the illustrated example, a cutout is provided in the vicinity of the cylindrical bearing portion 16 in the lower half side portion of the flat plate-like portion 15 so as to surround the lower positioning projection piece 19 in a punched shape. The example provided in cut-and-raised form is shown.

Instead of the above-described formation mode, the positioning protrusions 18 and 19 may be provided in an attached shape by casting or welding.
Further, the shape and position of the positioning protrusions 18 and 19 are not limited to the above example, and can be appropriately modified.
Also, the upper and lower corners of the projecting direction tip of each positioning protrusion 18 and 19 may be chamfered such as an R chamfer.
The hinge 1 may be formed of a metal material or the like.

Next, an example of the construction procedure of the hinge 1 having the above configuration will be described with reference to FIG.
First, as shown in FIGS. 3A and 3B, the frame-side blade portion 14 is arranged so as to be along the expected surface 3 facing the entrance / exit side of the vertical frame 2. Further, the positioning protrusions 18 and 19 are brought into contact with the finding surface 4 of the vertical frame 2 to perform positioning in the expected direction with respect to the vertical frame 2, and are aligned at appropriate vertical positions, and the frame-side blade portion 14 is positioned. It is fixed to the vertical frame 2 by a stopper 7. In addition, the door-side blade portion 10 is fixed by a stopper 7 at an appropriate position on the suspension-side end surface of the door plate 2.
And as shown in FIG.3 (c), the door side blade | wing part 10 fixed to the doorplate 6 in the bearing hole 17 of the cylindrical bearing part 16 of the frame side blade | wing part 14 of the state fixed to the vertical frame 2 is carried out. The shaft portion 13 may be fitted and the door plate 6 may be suspended from the vertical frame 2. In addition, it replaces with such an aspect, the frame side blade | wing part 14 and the door side blade | wing part 10 are connected, and the door plate 6 is fixed with respect to the door side blade | wing part 10 of the state fixed to the vertical frame 2. It is good also as an aspect. In addition, various modifications are possible as the construction procedure.

Since the hinge 1 according to the present embodiment is configured as described above, positioning in the expected direction with respect to various door frames (vertical frames) 2 can be easily performed.
That is, the frame-side blade portion 14 protrudes in the direction along the thickness direction of the vertical frame 2 to the end portion (axis-side end portion) on the connection side with the door-side blade portion 10, and on the finding surface 4 of the vertical frame 2. Positioning protrusions 18 and 19 to be contacted are provided. Accordingly, as described above, the positioning protrusions 18 and 19 are brought into contact with the finding surface 4 of the door frame 2 so that the frame-side blade portion 14 is along the expecting surface 3 of the vertical frame 2. Positioning in the expected direction with respect to 2 can be easily performed. Thereby, it is possible to easily perform positioning in the expected direction even for various door frames that are not provided with positioning notches.
Moreover, since the positioning protrusions 18 and 19 are provided at the axial end of the frame-side blade portion 14, the projection dimension of the hinge 1 itself from the vertical frame 2 to the outward side in the expected direction (front side) is effective. Can be made smaller.

  Moreover, in this embodiment, since the several positioning protrusions 18 and 19 are provided in the axial side edge part of the frame side blade | wing part 14 at intervals in the axial direction, the frame side blade | wing part 14 with respect to the vertical frame 2 is provided. Positioning in the expected direction can be performed stably. Further, when the dimension along the vertical direction of each positioning protrusion 18, 19 is set to a relatively small dimension, the frame-side blade portion 14 is displaced about the axis along the thickness direction of the plate-like portion 15. This can be suppressed.

  Further, in the present embodiment, the positioning protrusions 18 and 19 are shielded by the columnar portions 12 and 16 provided at the axial end portions of the frame-side blade portion 14 and the door-side blade portion 10 when viewed in the expected direction. Is provided. Therefore, in the state seen from the front of the expected direction, the positioning protrusions 18 and 19 are shielded by the cylindrical portions 12 and 16, so that the positioning protrusions 18 and 19 can be made inconspicuous. Instead of such a mode, the positioning protrusions 18 and 19 may be provided so as to protrude from the columnar portions 12 and 16 when viewed in the expected direction.

In the present embodiment, an example is shown in which a single positioning protrusion 18, 19 is provided on each of the upper half side portion and the lower half side portion of the flat plate-like portion 15 of the frame side blade portion 14. However, it is good also as a structure which provided the several positioning protrusion on both or one side of the upper half side site | part and the lower half side site | part.
Moreover, in this embodiment, it is the example which set it as the structure which each provided the positioning protrusions 18 and 19 in the up-down direction intermediate part in each of the upper half side site | part of the flat plate-like part 15 of the frame side blade | wing part 14, and a lower half side site | part. However, the present invention is not limited to such a mode. For example, it is good also as an aspect etc. which provided the positioning protrusion on each of the upper end part and lower end part of the flat plate-like part 15 of the frame side blade | wing part 14. FIG.

Further, in the present embodiment, an example is shown in which a plurality of positioning protrusions 18 and 19 are provided at the axial end of the flat plate-like portion 15 of the frame-side blade portion 14 with an interval in the axial direction. It is good also as a structure which provided the one positioning protrusion. In this case, it is good also as an aspect etc. which provided the positioning protrusion piece over the whole up-down direction of the axial side edge part of the flat plate-shaped part 15 of the frame side blade | wing part 14. FIG.
Moreover, in this embodiment, although the example which set the structure which can connect the door side blade | wing part 10 with respect to the frame side blade | wing part 14 of the state fixed to the vertical frame 2 is shown, it replaces with such an aspect. The door-side blade portion 10 and the frame-side blade portion 14 may be connected so as not to be detachable.

Moreover, in the above-described example, the protruding corner portion of the vertical surface 2 of the vertical frame 2 to be fixed to the frame-side blade portion 14 of the hinge 1 has a right-angled shape with no chamfered portion or the like. However, it is also possible to provide a chamfered portion at the projecting corner between the prospecting surface 3 and the finding surface 4. In this case, the chamfered portion is grasped as the finding surface 4, and the positioning protrusions 18 and 19 may be shaped along the chamfered portion, or abut on the flat surface-like finding surface 4 facing the front side. As described above, the positioning protrusions 18 and 19 may have appropriate protrusion dimensions.
In the above example, the vertical frame 2 is a fixed frame, but the vertical frame 2 may be a casing frame instead of such a mode. In this case, the positioning protrusions 18 and 19 may have appropriate protrusion dimensions so as not to interfere with the frame member of the casing frame.
Moreover, in the above-mentioned example, although the door plate 2 used as the fixing object of the door side blade | wing part 10 of the hinge 1 is shown as an opening door, it is not restricted to such an aspect, For example, the hanging side of a folding door is shown. It is good also as a door board.

DESCRIPTION OF SYMBOLS 1 Hinge 10 Door side blade | wing part 12 Columnar part 13 Shaft part 14 Frame side blade | wing part 16 Cylindrical bearing part (columnar part)
18 Upper positioning protrusion (positioning protrusion)
19 Lower positioning protrusion (positioning protrusion)
2 Vertical frame (door frame)
4 Finding face 6 Doorboard

Claims (3)

A door-side blade portion fixed to the door plate, and a frame-side blade portion that is rotatably connected to the door-side blade portion and fixed to the door frame,
A positioning protrusion that protrudes in a direction along the thickness direction of the door frame and abuts against the finding surface of the door frame at an end of the frame side blade portion on the connection side with the door side blade portion. A hinge characterized in that it is provided. In claim 1,
A hinge having a plurality of positioning protrusions provided at an end in a connecting direction of the frame side blade portion at an interval in an axial direction as a center of rotation with the door side blade portion. In claim 1 or 2,
A columnar part including a shaft part serving as a rotation center of each other and a cylindrical bearing part that receives this shaft part is provided at the end part on the connection side of the frame side blade part and the door side blade part,
The hinge according to claim 1, wherein the positioning protrusion is provided so as to be shielded by the columnar portion when viewed in the expected direction.

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