JP3947710B2 - Folding door mounting structure - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a mounting structure when folding doors such as closets are interposed between the guide rails, and more particularly to a mounting structure in which measures for preventing folding of the folding door are taken.
[0002]
[Prior art]
Conventionally, there is a structure related to a mounting structure in which measures for preventing the folding of the folding door have been taken (see, for example, Patent Document 1).
In this mounting structure, as shown in FIG. 10, when the folding door 100 is interposed between the upper guide rail 101 and the lower guide rail (in FIG. 10, only the upper guide rail 101 side is drawn) A bearing member 102 is fixed to the guide rail 101 with a screw 103, the pivot shaft 100a of the folding door 100 is locked in a receiving hole 102a provided in the bearing member 102, and an upright portion 102b provided in the bearing member 102 is guided to the guide rail 101. A mode is adopted in which the end portion 101a of the rail 101 is opposed to the end portion 101a by an allowable distance L. As a result, even when the screw 103 is loosened and the bearing member 102 moves, the upright portion 102b of the bearing member 102 abuts against the end 101a of the guide rail 101, and further movement of the bearing member 102 is prevented. For this reason, the folding door can be prevented from falling down.
[0003]
[Patent Document 1]
Japanese Patent No. 3268275 (pages 2 and 3, FIG. 3 (b))
[0004]
[Problems to be solved by the invention]
However, the conventional mounting structure described above can prevent the folding door from collapsing when the screw is loosened. However, in order to save labor of installing the folding door between the guide rails in the field, the bearing member is attached to the guide rail. If the bearing member is shipped in a state where it is temporarily fixed, the bearing member is likely to drop off from the guide rail, and if it is dropped and lost, it will be necessary to request a retransmission of the bearing member. There is a problem.
Also, for example, when three sets of folding doors are interposed between the guide rails arranged at the front and rear doors (for example, see FIGS. 1 and 7), the conventional mounting structure described above is applied to the folding doors on both sides. Although the folding door can be prevented from falling down, the conventional mounting structure cannot be applied to the central folding door sandwiched between both sides, and therefore there is a problem that the folding door cannot be prevented from falling down.
[0005]
An object of the present invention is to provide a folding door mounting structure that can prevent the folding doors of various specifications from falling down, and can reliably save labor during construction work on site.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the folding door mounting structure according to claim 1 of the present invention is pivotable via a pivot shaft on a pivot receiving body whose suspension base is mounted on an upper guide rail or a lower guide rail. When the door end side is supported and movably disposed with respect to the guide rail, the protrusion is provided on the pivot receiver, and the protrusion is inserted into the guide rail to which the pivot receiver is attached. By adopting such a mounting structure in which the projection of the pivot receiver is inserted into the long hole of the guide rail, a conventional structure is provided. The folding doors of various specifications to which the above mounting structure cannot be applied can be prevented from falling down and shipped with the pivot receiver temporarily fixed to the guide rail. Hardly fall off the pivot receiving body from the guide rail, labor during construction work in the field exhibit the significant effect that reliably Habukeru.
By the way, this attachment structure may be taken about the said upper guide rail of the folding door provided only with the upper guide rail, for example. Moreover, this attachment structure may be taken about both the guide rails of the folding door provided with both the upper and lower guide rails, and may be taken only about the upper guide rails, for example.
[0007]
In the folding door mounting structure according to claim 2 of the present invention, the protrusion of the pivot receiver is formed of a hollow substantially cylindrical body having a larger diameter portion than the hole width of the long hole of the guide rail, and the cylindrical body. A plurality of slits are provided along the axial direction of the projection, and the projection is inserted into the elongated hole by squeezing the projection, and after the insertion, the projection is restored and locked into the elongated hole. The above effect can also be obtained by an attachment structure in which such projections have an elastic force.
[0008]
In the folding door mounting structure according to claim 3 of the present invention, the protrusion of the pivot receiver is formed of a substantially cylindrical body that is continuously arranged with the large-diameter portion upward and the small-diameter portion downward. The long hole includes a small hole portion formed with a hole width through which only a small diameter portion of the protrusion can be inserted, and a large hole portion that is connected to the small hole portion and into which the large diameter portion of the protrusion can be inserted. The protrusion is inserted from the large hole portion of the long hole, and after insertion, the protrusion is moved to the small diameter portion of the long hole and locked to the small diameter portion. Therefore, the above-described effect can be obtained by such a mounting structure.
[0009]
In the folding door mounting structure according to claim 4 of the present invention, the large hole portion of the long hole is positioned on the hanging door side of the folding door, and the small hole portion of the long hole is positioned on the door end side of the folding door. As a result, the folding door can be prevented from falling down more effectively.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A folding door mounting structure according to a first embodiment of the present invention will be described with reference to FIGS. 3 (A) is a front view of the pivot receiver, FIG. 3 (B) is a view as seen from the arrow B in FIG. 3 (A), and FIG. 3 (C) is a view as seen from the arrow C in FIG. .
The mounting structure according to the present embodiment is an example in the case where three sets of folding doors are interposed between guide rails arranged at the front and rear openings, and as shown in FIG. A frame 1 composed of a frame 1b and vertical frames 1c and 1d is disposed in the frontage, a guide rail 2 (see, for example, FIG. 2) is provided on the upper frame 1a, and the present embodiment is provided on the lower frame 1b. Then, when a guide rail (not shown) similar to the guide rail 2 is attached, the present invention relates to an attachment structure when three sets of folding doors 3a to 3c are interposed between the guide rails.
[0011]
Each of these folding doors 3a to 3c is formed by connecting thin plate members having the same shape with hinges (not shown). For example, the folding door 3b sandwiched between the folding doors 3a and 3c on both sides will be described. 3b is a pivot receiver in which the thin plate member 3b ₁ on the suspension side and the thin plate member 3b ₂ on the door end side are connected by a hinge, and the thin plate member 3b ₁ is attached to the guide rail 2 as will be described in detail later. 6 is rotatably supported via an upper pivot shaft (pivot shaft) 4 urged by a spring (not shown) 6, and the thin plate member 3 b ₂ moves to the guide rail 2 via the upper guide pivot 5. As shown by a two-dot chain line in FIG. 1, it is bent and opened in a substantially V shape.
For the guide rail attached to the lower frame 1b, a lower pivot shaft (not shown) is provided to face the pivot shaft 4, and a lower guide pivot (not shown) to face the guide pivot 5. ) Is of course provided.
[0012]
Below, the guide rail 2 and the pivot receiving body 6 attached to this guide rail 2 are demonstrated with reference to FIG.
The guide rail 2 is a long-shaped object with a length of about one and a half that forms a substantially inverted U-shaped cross section by a pair of vertical plates 2a and horizontal plates 2b, and is an inner side defined by the vertical plates 2a and 2b. A space into which the following pivot receiving body 6 is inserted is formed, and a pair of convex portions 2c are projected from a position located below the vertical member 2a so as to protrude into the space. Then, at an appropriate position of the horizontal plate 2b of the guide rail 2, a long hole 2d into which the projection 10 of the pivot receiver 6 described below is inserted coincides with the center line of the horizontal plate 2b and extends along the longitudinal direction of the guide rail 2. In this embodiment, the long hole 2d is also provided at an appropriate position of the guide rail 2 where the folding doors 3a and 3c are interposed (in the enlarged view in FIG. A long hole 2d corresponding to the folding door 3b is shown).
[0013]
The pivot receiver 6 is composed of a rectangular bottom plate 7 and a substantially rectangular top plate 8 erected on the bottom plate 7, and the top plate 8 has one end side of the top plate 8 of the bottom plate 7. It overhangs from one end side, and the other end side of the top plate 8 is erected at a substantially central portion of the bottom plate 7. Then, on the lower surface of the overhang portion 8a of the top plate 8, there is an inclined portion 8a on the lower surface of the bottom plate 7 from one end of the top plate 8 and slightly away from one end of the bottom plate 7 toward the center thereof. ₁ is formed, and the pivot receiver 6 is attached to the guide rail 2 between the edge of the bottom plate 7 on both sides of the top plate 8 from the other end of the top plate 8 to the substantially central portion of the inclined portion 8a _1. A concave groove 8a ₂ is formed to engage with the convex portion 2c of the guide rail 2 when inserted. Furthermore, while the inclined surfaces 8a ₁ of the top plate 8 penetrates the bottom plate 7 and top plate 8 in the vicinity of the place where it reaches the lower surface of the bottom plate 7, the insertion hole 9 of the pivot shaft 4 is provided, overhang of the top plate 8 in 8a the tip, the flat surface on the opposite side to the inclined surface 8a ₁ short columnar the projection 10 is projected.
[0014]
Further, a bolt insertion hole 7a of the mounting bolt 11 is provided near the other end of the bottom plate 7, and a rotation stop wall 7b of a thin plate-like rectangular nut 12 is erected on the other end edge of the bottom plate 7. The rotation stop wall 7b is arranged such that the nut 12 is sandwiched between the bottom plate 7 and the protrusion 2c of the guide rail 2 and the mounting bolt 11 is screwed into the screw hole of the nut 12. It serves to prevent the nut 12 from rotating when the pivot receiver 6 is attached to the guide rail 2.
[0015]
This mounting structure will be described based on the case where the folding door 3b is interposed between the guide rails. In general, the folding door 3a or the folding door 3c is completely installed before the folding door 3b is interposed in the guide rail. However, the folding door 3b can be inserted first. By the way, at the time of shipment, the pivot receiver 6 is temporarily fixed to the guide rail 2 by the mounting bolt 11, and the protrusion 10 of the pivot receiver 6 is inserted into an arbitrary position of the elongated hole 2 d of the guide rail 2. Therefore, when the folding door 3b composed of the thin plate member 3b ₁ and the thin plate member 3b ₂ is interposed, the folding door 3b is slightly inclined so that the pivot shaft 4 of the thin plate member 3b ₁ is aligned with the inclined surface 8a ₁ of the pivot receiver 6. moved and inserted into the insertion hole 9 of the pivot receiving body 6 while, Orito 3b to be interposed between the guide rail (this time, the guide pivot 5 sheet member 3b ₂ is movably disposed in the guide rail 2 ). However, when the thin plate member 3b ₁ of the folding door 3b is not adjacent to the thin plate member on the front end side of the folding door 3a without a gap, the pivot receiver 6 is moved and adjusted with respect to the guide rail 2 ( At this time, the projection 10 is moved to the appropriate position from the above-described arbitrary insertion position of the long hole 2d), and the pivot receiving body 6 is finally tightened to the guide rail 2 with the mounting bolt 11 when the gap between the two ends. Thus, the installation work of the folding door 3b is completed at the same time as the installation work of the mounting pivot receiver 6 to the guide rail 2 is completed.
Thus, since the attachment structure which inserts the protrusion 10 in the long hole 2d is taken, also in the case where three sets of folding doors 3a-3c are interposed between guide rails, these folding doors 3a-3c, especially It is possible to prevent the folding door 3b from falling down, and even if the pivot receiving body 6 is shipped with the guide rail 2 attached, the pivot receiving body 6 is less likely to fall off from the guide rail 2 than before, so that Time and effort during construction work can be saved reliably.
[0016]
By the way, when the pivot shaft 4 of the folding door 3b is inserted into the insertion hole 9 of the pivot receiver 6 as described above, first, the pivot receiver attached to the guide rail of the lower frame 1b is provided on the pivot receiver. The lower pivot shaft of the thin plate member 3b ₁ is inserted into the inserted hole. In this embodiment, the pivot shaft 4 can be inserted into the insertion hole 9 of the pivot receiver 6 before the lower pivot shaft can be inserted into the insertion hole of the pivot receiver.
When the pivot receiver 6 is moved and adjusted with respect to the guide rail 2, the pivot receiver attached to the guide rail of the lower frame 1b is naturally moved and adjusted with respect to the guide rail.
[0017]
Next, a folding door mounting structure according to a second embodiment of the present invention will be described with reference to FIGS. However, in FIGS. 4-6, the same number is attached | subjected to the same member as the structural member of FIGS. 1-3, and the description is omitted. Incidentally, FIG. 5 (A) a front view of the pivot receiving body, FIG. 5 (B) _{B 1} arrow view in FIG (A), FIG. 5 (C) is _{C 1} arrow view of FIG. (A) It is.
The present mounting structure is also an example in which three sets of folding doors 3a to 3c are interposed between the guide rails disposed at the front and rear openings, but in this mounting structure, the guide rail 2 is replaced with a guide. The rail 20 is replaced by a pivot receiver 21 instead of the pivot receiver 6.
As shown in FIG. 4, the guide rail 20 is a long-shaped object having a substantially H-shaped cross section formed by a pair of vertical members 20 a and horizontal members 20 b and is partitioned by the horizontal member 20 b. A small space is formed in the upper part, and a large space is formed in the lower part, and the convex part 20c is projected from the lower part of the vertical member 20a so as to protrude into the large space. Yes. And the long hole 20d in which the protrusion 25 of the following pivot receiving body 21 is inserted in the appropriate position of the horizontal member 20b of the guide rail 20 is made to correspond to the center line of the horizontal member 20b, and the aspect along the longitudinal direction of the guide rail 20 is used. It has been drilled. Of course, the long hole 20d is also provided at an appropriate position of the guide rail 20 in which the folding doors 3a and 3c are interposed.
[0018]
As shown in FIGS. 4 and 5, the pivot receiver 21 includes a rectangular bottom plate 22 and a substantially rectangular top plate 23 having a plate width somewhat smaller than the width of the bottom plate 22. The plate 23 is erected so as to coincide with the center line of the bottom plate 22 with one end of the top plate 23 overhanging from one end of the bottom plate 22, and pivot receivers 21 on both side edges of the bottom plate 22. to when mounted on guide rails 20, abutting convex portions 22a on the lower surface 20c ₁ of the convex portion 20c of the guide rail 20 is installed to be formed. Then, on the lower surface of the overhang portion 23a of the top plate 23, there is an inclined portion 23a on the lower surface of the bottom plate 22 from one end of the top plate 23 and slightly away from one end of the bottom plate 22 toward the center thereof. ₁ is formed, and an insertion hole 24 of the pivot shaft 4 is provided in the vicinity of where the inclined surface 23 a ₁ of the top plate 23 reaches the lower surface of the bottom plate 22 and penetrates the bottom plate 22 and has a hole bottom on the top plate 23 side. while is provided, immediately above the insertion hole 24, the inclined surface 8a ₁ and projections 25 are provided on the upper surface of the opposite side of the top plate 23, such projections 25, holes of the long hole 20d of the guide rail 20 In addition to being formed of a hollow substantially cylindrical body having a large diameter portion 25a larger than the width, four slits 25b are provided on the circumference equally along the axial direction of the cylindrical body.
[0019]
Further, a bolt insertion hole 22b of the mounting bolt 11 is provided near the other end of the bottom plate 22, while a mounting bolt 11 is provided near the other end of the top plate 23 so as to coincide with the central axis of the insertion hole 22b. Bolt insertion hole 23b is provided. Further, as shown in detail in FIG. 6, the nut 12 can be inserted into the lower portion of the top plate 23 provided with the insertion hole 23 b, and the mounting bolt 11 is screwed into the inserted nut 12. A space that allows the rotation of the nut 12 when formed is formed. Reference numerals 23 c and 23 d are rotation stop walls of the nut 12, which are rotation stoppers of the nut 12 that are generated when the mounting bolts 11 are screwed together. Here, the operation when the mounting bolt 11 is screwed onto the nut 12 will be described with reference to FIG. 6. The longitudinal direction of the nut 12 as shown in FIG. 6 and the projection 20c of the guide rail 20 is sandwiched between the bottom plate 22 and the mounting bolt 11 is screwed into the screw hole of the nut 12, the nut 12 becomes as shown in FIG. As shown in FIG. 5B, it rotates by screwing friction and comes into contact with the stop walls 23c and 23d. If the mounting bolt 11 is screwed further in this contacted state, it will guide between the bottom plate 22. The protrusion 20c of the rail 20 is firmly clamped, whereby the pivot receiver 21 is attached to the guide rail 20.
[0020]
This mounting structure will be described by the case where the folding door 3b is interposed between the guide rails as described above.
As described above, the pivot receiver 21 is temporarily fixed to the guide rail 20 by the mounting bolt 11 at the time of shipment, and the protrusion 25 of the pivot receiver 21 is inserted into an arbitrary position of the long hole 20d of the guide rail 20. That is, at the time of shipment, together with the pivot receiving body 21 the convex portion 22a is in contact of the pivot receiving body 21 to the lower surface 20c ₁ of the convex portion 20c of the guide rail 20 is inserted into the lower part of the space of the guide rail 20, the mounting In the structure, the protrusion 25 is inserted into the long hole 20d by squeezing the protrusion 25. After the insertion, the protrusion 25 is restored and locked at an arbitrary position of the long hole 20d. The mounting rail 11 is temporarily fixed to the guide rail 20. By the way, the temporary fixing of the pivot receiver 21 to the guide rail 20 in the present mounting structure is not performed by inserting the pivot receiver 6 from the end of the guide rail 2 as in the first embodiment described above, but by pivot receiving. Since the body 21 can be directly attached to a predetermined position of the guide rail 20, the attachment can be easily performed even if the long hole 20 d of the guide rail 20 is in the center of the guide rail 20.
However, when the folding door 3b including the thin plate member 3b ₁ and the thin plate member 3b ₂ is interposed, the folding door 3b is slightly inclined as described above, and the pivot shaft 4 of the thin plate member 3b ₁ is inclined to the inclined portion 23a _{1 of the} pivot receiver 21. And is inserted into the insertion hole 24 of the pivot receiver 21, and the folding door 3b is interposed between the guide rails. However, when the thin plate member 3b ₁ of the folding door 3b is not adjacent to the thin plate member on the front end side of the folding door 3a without a gap, the pivot receiver 21 is moved with respect to the guide rail 20 as described above. Adjustment is performed (at this time, the protrusion 25 is moved from the above-described arbitrary insertion position of the long hole 20d to an appropriate position), and when the gap between them disappears, the pivot receiver 21 is attached to the guide rail 20 with the mounting bolt 11 At the same time that the installation work on the guide rail 20 of the mounting pivot receiver 21 is finished by tightening, the intervention of the folding door 3b is completed.
[0021]
Next, a folding door mounting structure according to a third embodiment of the present invention will be described with reference to FIGS. However, in FIGS. 7-9, the same number is attached | subjected to the same member as the structural member of FIGS. 1-6, and the description is omitted. Incidentally, FIG. 9 (A) is a front view of the pivot receiving member, _{B 2} arrow view of FIG. 9 (B) Fig (A), _{C 2} arrow view shown in FIG. 9 (C) the figure (A) It is.
This mounting structure is also an example in which three sets of folding doors 3a to 3c are interposed between the guide rails arranged at the front and rear openings, but this mounting structure is the second embodiment described above. Compared with the mounting structure according to the above, a guide rail 30 is used instead of the guide rail 20, and a pivot receiver 31 is used instead of the pivot receiver 21.
Of these, the guide rail 30 is different from the guide rail 20 in that a long hole 32 is provided in the transverse member 20b instead of the long hole 20d, and the pivot receiver 31 is different from the pivot receiver 21. The projection 33 is provided on the top surface of the top plate 23 instead of the projection 25.
[0022]
The projection 33 of the pivot receiver 31 is formed in a hollow and substantially cylindrical shape in this embodiment, which is continuously arranged with the truncated cone-shaped large-diameter portion 33a facing upward and the cylindrical-shaped small-diameter portion 33b facing downward. Is.
The long hole 32 of the guide rail 30 is connected to the small hole portion 32a which is larger than the small diameter portion 33b of the protrusion 33 and has a smaller hole width than the large diameter portion 33a. And the large diameter part 33a of the protrusion 33 is formed with the large hole part 32b formed with the hole diameter which can be inserted.
By the way, the small hole portion 32a and the large hole portion 32b of the long hole 32 are arranged on the suspending side of the folding door 3b as shown in the enlarged view of FIG. Is provided so as to be located on the front end side of the folding door 3b, so that the folding door 3b is more effectively prevented from falling down.
[0023]
This mounting structure will be described by the case where the folding door 3b is interposed between the guide rails as described above.
As described above, at the time of shipment, the pivot receiver 31 is temporarily fixed to the guide rail 30 by the mounting bolt 11, and the protrusion 33 of the pivot receiver 31 is inserted into the small hole portion 32 a of the long hole 32 of the guide rail 30. That is, at the time of shipment, together with the pivot receiving body 31 the convex portion 22a is in contact of the pivot receiving body 31 to the lower surface 20c ₁ of the convex portion 20c of the guide rail 30 is inserted in the lower space of the guide rail 30, the mounting In the structure, the protrusion 33 is inserted from the large hole portion 32b of the long hole 32, and after the insertion, the protrusion 33 is moved to the small diameter portion 32a of the long hole 32 and locked to the small diameter portion 32a. The pivot receiver 31 is temporarily fixed to the guide rail 30 by the mounting bolt 11. By the way, the temporary attachment of the pivot receiver 31 to the guide rail 30 in this mounting structure can also directly attach the pivot receiver 31 to a predetermined position of the guide rail 30. Even if 32 is in the center of the guide rail 30, it can be easily attached.
However, when the folding door 3b including the thin plate member 3b ₁ and the thin plate member 3b ₂ is interposed, the folding door 3b is slightly inclined as described above, and the pivot shaft 4 of the thin plate member 3b ₁ is inclined to the inclined portion 23a _{1 of the} pivot receiver 31. And is inserted into the insertion hole 24 of the pivot receiver 31, and the folding door 3b is interposed between the guide rails. However, when the thin plate member 3b ₁ of the folding door 3b is not adjacent to the thin plate member on the front end side of the folding door 3a without a gap, the pivot receiver 31 is moved with respect to the guide rail 30 as described above. (At this time, the protrusion 33 is moved to an appropriate position of the small hole portion 32a of the long hole 32), and the pivot receiver 31 is attached to the guide rail 30 with the mounting bolt 11 when the gap between them disappears. At the same time as the installation work on the guide rail 30 of the mounting pivot receiver 31 is finished, the installation of the folding door 3b is completed.
[0024]
【The invention's effect】
According to the folding door mounting structure of the present invention, since the mounting structure in which the projection of the pivot receiving body is locked in the elongated hole of the upper and lower guide rails is adopted, the folding door falls down with respect to the folding door of various specifications to which the conventional mounting structure cannot be applied. In addition, even when shipped with the pivot receiver attached to the guide rail, it is difficult for the pivot receiver to drop off from the guide rail, and it is possible to save time and labor during construction work on site.
[Brief description of the drawings]
FIG. 1 is a perspective view of a folding door in which a mounting structure according to a first embodiment is used.
FIG. 2 is an exploded perspective view of the mounting structure of FIG.
FIG. 3 is a configuration diagram of a pivot receiver used in the mounting structure of FIG. 1;
FIG. 4 is an exploded perspective view of a mounting structure according to a second embodiment.
FIG. 5 is a configuration diagram of a pivot receiver used in the attachment structure of FIG. 4;
6 is an explanatory view when the pivot receiver of FIG. 4 is attached. FIG.
FIG. 7 is a perspective view of a folding door in which a mounting structure according to a third embodiment is used.
8 is an exploded perspective view of the mounting structure of FIG.
9 is a configuration diagram of a pivot receiver used in the mounting structure of FIG. 7;
FIG. 10 is a configuration diagram of a conventional folding door mounting structure.
[Explanation of symbols]
2, 20, 30 Guide rails 2d, 20d, 32 Long holes 3a-3c Folding door 4 Upper pivot shaft (pivot shaft)
6, 21, 31 Pivot receiver 10, 25, 33 Projection 25a Large diameter portion 25b Slit 32a Small hole portion 32b Large hole portion 33a Large diameter portion 33b Small diameter portion

Claims (4)

The suspension side is pivotally supported by a pivot receiver attached to the upper guide rail or the lower guide rail via a pivot shaft, and the door end side is arranged to be movable with respect to the guide rail. In the folding door mounting structure, a protrusion is provided on the pivot receiver, and a long hole is formed in the guide rail to which the pivot receiver is attached along the longitudinal direction of the guide rail. A folding door mounting structure characterized by that. The protrusion is formed of a hollow substantially cylindrical body having a larger diameter portion than the hole width of the long hole, and a plurality of slits are provided along the axial direction of the cylindrical body. The folding door mounting structure according to claim 1. The protrusion is formed of a substantially cylindrical body continuously provided with a large-diameter portion upward and a small-diameter portion downward, while the long hole is formed with a hole width through which only the small-diameter portion can be inserted. 2. The folding door mounting structure according to claim 1, further comprising: a small hole portion that is continuous with the small hole portion, and a large hole portion into which the large diameter portion can be inserted. 4. The folding door mounting structure according to claim 3, wherein the large hole portion is provided on a hanging origin side of the folding door, and the small hole portion is provided on a door tip side of the folding door.

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