Hanging side bearing and folding door device

Abstract

To provide a hinging side bearing fixture and a folding door device that can improve workability of adjustment when adjusting the pivot position of a hinging side rotating shaft in the left-right direction.SOLUTION: A hinging side bearing fixture 2 into which the hinging side rotating shaft protruding from the hinging side of the door board is inserted includes a mounting housing 5 that is attached to a guide rail, a movable bearing part 6 that has a bearing hole 6a and is slidably attached to the mounting housing 5, a feed screw part 7 that is pivotally supported by the mounting housing 5, has a driven bevel gear 73 at one end, and has a threaded part 71 screwed into the movable bearing part 6 at the other end, and an operating shaft part 8 that is provided with an operating part 81 that can be rotated on one end and a driving bevel gear 82 that meshes with the driven bevel gear 73 on the other end. The operating shaft part 8 is pivotally supported with respect to the mounting housing 5 with the operating part 81 facing toward the door plate, so that the extension line of the axis is separated from the closed door plate as the axis being tilted in the front-back direction with respect to the up-down direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a hanging-side bearing device that rotatably supports a rotation axis such as a pivot provided on the hanging side of a door panel in a folding door device or swing door device that opens and closes openings in structures such as buildings and furniture. [Background technology]

[0002] Conventionally, in openings in buildings, etc., folding door devices have been installed in which door panels overlap when opened in order to reduce dead space caused by the opening and closing operation of door panels. As described in Patent Document 1, for example, such folding door devices are known to include a folding door with a pair of upper and lower rotating shafts on the hanging side and the door tip side, a pair of upper and lower hanging side bearings for rotatably supporting the hanging side rotating shafts, and a pair of upper and lower guide rails to which the hanging side bearings are fixed and for slidably guiding the door tip side rotating shafts, respectively.

[0003] However, in such folding door devices, due to various errors during construction (for example, dimensional errors and installation errors of each component) and aging, the folding door, more specifically the door panel on the hanging side, can tilt in the door width direction (left and right direction) relative to the vertical frame of the door frame, causing problems such as interference between the vertical frame and the hanging side door panel, or the gap between the vertical frame and the hanging side door panel becoming uneven in the vertical direction, which deteriorates the appearance. For this reason, at least one of the pair of upper and lower hanging side bearing devices is sometimes provided with a position adjustment mechanism to adjust the support position of the hanging side rotating shaft in the horizontal direction.

[0004] Specifically, the lower hanging-side bearing device described in Patent Document 1 includes a mounting body that includes a top plate with a female threaded hole and is attached to a lower guide rail, a movable bearing part that has an oval hole that overlaps the female threaded hole in the vertical direction and a bearing hole into which a lower hanging-side rotating shaft is inserted and is externally fitted to the top plate so as to be slidable in the left-right direction, and a fixing bolt that has an axis extending in the vertical direction and is screwed into the female threaded hole through the oval hole to fix the relative position of the movable bearing part with respect to the mounting body. With this lower hanging-side bearing device, the fixing bolt is loosened, and the relative position of the movable bearing part with respect to the mounting body is adjusted left and right within the range of the oval hole of the movable bearing part, and finally the fixing bolt is retightened to adjust the pivot support position of the hanging-side rotating shaft (position of the bearing hole).

[0005] For example, when performing the adjustment work during the construction of a folding door device, after attaching the folding door to the door frame, the folding door is opened, the fixing bolt of the hanging side bearing device is accessed from above and loosened, the pivot support position is adjusted by operating the movable bearing part through the folding door, and then the bolt is tightened again for adjustment. Alternatively, when the folding door is closed, a tool is inserted into the small gap between the horizontal frame of the door frame and the folding door to loosen the fixing bolt, and similarly, the folding door is operated and the fixing bolt is tightened again for adjustment. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-89303 Summary of the Invention [Problem to be solved by the invention]

[0007] However, when performing the adjustment work using the hanging side bearing device described in Patent Document 1, the left-right position adjustment is performed by operating the folding door, making fine adjustments difficult, and in some cases the door may shift position between positioning and retightening the fixing bolt, resulting in poor workability.

[0008] In addition, the adjustment work can be easily performed while checking the gap between the vertical frame and the folding door with the folding door closed, but with conventional hanging side bearing devices, a thin tool must be inserted and removed into the small gap to operate the fixing bolt, further reducing workability.

[0009] Such workability problems can occur not only with folding doors, but also with swinging doors such as hinged doors, when the hanging side bearing device is used.

[0010] The present invention has been made in consideration of the above-mentioned conventional problems, and aims to provide a hanging-side bearing device and a folding door device that can improve the workability of adjusting the support position of the hanging-side rotating shaft of a folding door device or swing door device in the left-right direction. [Means for solving the problem]

[0011] In order to solve the above problems, the hanging-side bearing device of the present invention is a hanging-side bearing device into which a rotating shaft protruding from the hanging side of a door panel is inserted, and comprises: a mounting body attached to the horizontal frame of the door frame; a movable bearing part having a bearing hole into which the rotating shaft is inserted and attached so as to be slidable in the left-right direction relative to the mounting body with the bearing hole exposed; a feed screw part journaled on the mounting body and having a driven bevel gear at one end and a threaded part at the other end that screws into the movable bearing part; and an operating shaft part having an operating part that is rotated at one end and a drive bevel gear that meshes with the driven bevel gear at the other end, and the operating shaft part is journaled on the mounting body so that when the operating part is pointed towards the door panel, the axis of the operating shaft is inclined in the front-to-back direction relative to the up-and-down direction, so that the extension of the axis of the operating shaft is away from the door panel in the closed state. The term "door frame" including the "horizontal frame" includes not only the frame itself, such as the top frame, vertical frame, and door sill, but also the upper and lower guide rails attached to these frames, or to the wall, ceiling, or floor that forms the opening, and also includes the structures themselves, such as the wall, ceiling, or floor that form the opening. Furthermore, the terms "left-right direction," "up-down direction," and "front-rear direction" may be strict, but are also concepts that include substantial directions.

[0012] According to this invention, the device includes the mounting body, the movable bearing, the feed screw, and the operating shaft. By rotating the operating shaft through the operating unit, the feed screw rotates, and the feed screw slides the movable bearing relative to the mounting body in the left-right direction. Therefore, with this hanging-side bearing device, there is no need to adjust the position of the door panel through manipulation. The simple operation of rotating the operating unit allows for fine adjustment of the door panel's rotation axis, and thus the tilt of the door panel. Furthermore, because the rotation of the operating unit is transmitted through the meshing of the drive and driven bevel gears, the axis of the operating shaft can be positioned intersecting the axis of the feed screw. Furthermore, the operating shaft is journaled to the mounting body so that, when the operating unit is oriented toward the door panel, the axis is tilted forward and backward relative to the up-down direction, so that the extension of the axis is away from the closed door panel. Therefore, the operating part of the operating shaft can be operated obliquely in the up-down direction without interfering with the closed door panel. As a result, with this hanging-side bearing device, even when the door panel is closed, there is no need to insert a tool into the narrow gap between the door frame and the door panel, and the operating part can be easily accessed from the front, back, and diagonally in the vertical and vertical directions, so position adjustment work can be easily performed while checking the gap between the vertical frame and door panel or between the door panels when the door panel is closed.

[0013] In other words, according to the present invention, in folding door devices, swing door devices, etc., it is possible to fine-tune the left-right position of the hanging side rotation axis, and the operating part of the operating axis part can be easily accessed, thereby effectively improving the workability in this position adjustment.

[0014] In this invention, the operating shaft may be single or multiple. That is, in this invention, a second operating shaft is further provided, having a second operating part at one end which is rotatably operated and a second driving bevel gear at the other end which meshes with the driven bevel gear, and the second operating shaft is preferably inclined in the opposite direction to the operating shaft in the front-to-rear direction.

[0015] With this configuration, the feed screw portion can be rotated via the operating shaft portion or the second operating shaft portion from either the front or rear side of the closed door panel, thereby further improving the ease of position adjustment.

[0016] In this case, it is preferable that the second operating shaft portion is disposed at a position symmetrical to the operating shaft portion in a cross section perpendicular to the left-right direction.

[0017] With this configuration, the inclination angle of the second operating shaft is the same (including approximately the same) as the inclination angle of the operating shaft, and the operating shaft or the second operating shaft can be operated by the same procedure from either the front or back of the door panel when in the closed state.

[0018] In addition, the folding door device of the present invention comprises the hanging-side bearing device described in any one of claims 1 to 3, the horizontal frame including an upper guide rail to which the hanging-side bearing device is attached, a plurality of door panels hinged in the width direction, and a folding door including an upper rotating shaft that protrudes from the upper part of the hanging-side door panel among these door panels and is journaled on the hanging-side bearing device.

[0019] According to this invention, the workability of the position adjustment work can be effectively improved, just as in the case of the hanging side bearing device. In particular, when this hanging side bearing device is attached to the upper guide rail as in the present invention, it can have a better appearance than when it is attached to the lower guide rail, and it is less affected by the weight of the door panel, so it is relatively easy to rotate the operating shaft. [Effects of the Invention]

[0020] The hanging side bearing device and folding door device of the present invention allow fine adjustment of the left-right position of the hanging side rotation shaft, and also allow easy access to the operating part of the operating shaft, thereby effectively improving the workability of this position adjustment. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing an outline of a folding door device to which a hanging-side bearing device of one embodiment of the present invention is applied. [Figure 2] FIG. 2 is a cross-sectional view showing the folding door device with some parts omitted. [Figure 3] FIG. 2 is a perspective view showing a hanging-side bearing device according to an embodiment of the present invention. [Figure 4] FIG. 2 is an exploded perspective view of the bearing device. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 5. [Figure 9] FIG. 2 is a bottom view showing the mounting housing of the embodiment in an exploded state. [Figure 10] FIG. 2 is a cross-sectional view showing the attached state of the hanging-side bearing device of one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] An embodiment of the present invention will be described below with reference to the drawings. The folding door device 1 of this embodiment is a fixed-hanging type that fixes the hanging side of the folding door 10, and will be described as a top-hanging type in which the door edge of the folding door 10 is hung on an upper guide rail, but it may also be a bottom-loading type in which the door edge of the folding door is supported by a lower guide rail. The folding door device may also be used in openings in buildings, such as partition doors or storage doors within buildings, or as furniture doors, etc.

[0023] Fig. 1 is a perspective view showing an outline of a folding door device to which the hanging-side bearing of this embodiment is applied, and Fig. 2 is a cross-sectional view showing the folding door device with some parts omitted. Note that in the following explanations, the +X direction in each figure will be referred to as the right direction, the +Y direction as the forward direction, and the +Z direction as the upward direction, but the X, Y, and Z directions respectively indicate the width, thickness, and height directions of the door panel in the closed state.

[0024] 1 and 2, this folding door device 1 comprises a folding door 10 having a pair of upper and lower rotating shafts 11-14 on the hanging side and door tip side, a pair of upper and lower hanging side bearings 2 and 3 for rotatably supporting the hanging side rotating shafts 11 and 12, a horizontal frame including a pair of upper and lower guide rails 15 and 16 to which the hanging side bearings 2 and 3 are fixed and for slidably guiding the door tip side rotating shafts 13 and 14, and a pair of left and right vertical frames 17 extending between both ends of the pair of upper and lower guide rails 15 and 16, and the opening of the structure is opened and closed by opening and closing the folding door 10. The lower door tip side rotating shaft 14 and lower guide rail 16 can be omitted as appropriate.

[0025] The folding door 10 comprises a plurality of door panels 18 (two in Fig. 1) arranged side by side in the left-right direction, a plurality of hinges 19 attached to both door panels 18 along the butt edges of the door panels 18, a pair of upper and lower hanging-side rotation shafts 11, 12 protruding upward and downward from the hanging-side side of the hanging-side door panel 18, and a pair of upper and lower front-side rotation shafts 13, 14 protruding upward and downward from the front-side side of the front-side door panel 18. When the folding door 10 is in a state in which the opening is closed by the door panels 18, the front-side door panel 18 is rotated around the front-side rotation shafts 13, 14, and the front-side rotation shafts 13, 14 slide toward the hanging-side rotation shafts 11, 12 along the pair of upper and lower guide rails 15, 16, and accordingly the hanging-side door panel 18 rotates around the hanging-side rotation shafts 11, 12 so as to bend relative to the front-side door panel 18, thereby opening the opening.

[0026] The upper hanging-side rotating shaft 11 is a known upper pivot shaft that is elastically contractible along its axial direction. The lower hanging-side rotating shaft 12 is also a known lower pivot shaft that may have an unchanged axial length, but in this embodiment, it is configured to be expandable and contractible along its axial direction by rotating forward and backward about its axis, allowing the height position of the door panel 18 to be adjusted. The door-end-side rotating shafts 13 and 14 can also be known door-end-side rotating shafts, and in this embodiment, include shaft bodies 13A and 14A, and upper runners 13B and lower sliders 14B that rotatably support the shaft bodies 13A and 14A and slide left and right along a pair of upper and lower guide rails 15 and 16, respectively.

[0027] Of the pair of upper and lower hanging base bearing fixtures 2, 3, a hanging base rotating shaft 11 (corresponding to the rotating shaft) is inserted into the upper hanging base bearing fixture 2. This upper hanging base bearing fixture 2 is an example of a hanging base bearing fixture of the present invention and will be described in detail later. A lower hanging base rotating shaft 12 is inserted into the lower hanging base bearing fixture 3. This lower hanging base bearing fixture 3 is a well-known hanging base bearing fixture, and in this embodiment, one with a bearing hole (not shown) that can be adjusted to slide left and right, like the lower hanging base bearing fixture described in Patent Document 1, is used.

[0028] The upper guide rail 15 is included in the horizontal frame together with the upper frame 15A. As shown in FIG. 2, the upper guide rail 15 is attached to the underside of the upper frame 15A along the left-right direction. The upper guide rail 15 is C-shaped and opens downward, supporting the upper runner 13B of the door-end rotation shaft 13 so that it can slide left and right. Specifically, as shown in FIG. 7, the upper guide rail 15 includes a top wall portion 151 extending left and right, front and rear side wall portions 152 extending downward from the front and rear end edges of the top wall portion 151, and front and rear flange portions 153 extending inward in the front-rear direction from the lower ends of the front and rear side wall portions 152. The tips of the front and rear flange portions 153 are spaced apart from each other, thereby opening downward. The lower guide rail 16 is included in the horizontal frame together with a floor surface 16A at the periphery of the opening. The lower guide rail 16 is formed in a C-shape that opens upward, and engages with the lower slider 14B of the door-end side rotation shaft 14 so that it can slide left and right. The lower guide rail 16 is embedded so that its upper surface is flush with the floor surface.

[0029] Next, a description will be given of the upper hanging-side bearing device 2. Fig. 3 is a perspective view of the upper hanging-side bearing device 2 as seen from below, and Fig. 4 is an exploded perspective view of the hanging-side bearing device 2.

[0030] This upper hanging-side bearing device 2 is equipped with a mounting housing 5 (corresponding to the mounting main body) attached to the upper guide rail 15, a movable bearing section 6 having a bearing hole 6a into which the upper hanging-side rotating shaft 11 is inserted and housed inside the mounting housing 5 so as to be slidable in the left-right direction with this bearing hole 6a exposed, a feed screw section 7 that is journaled on the mounting housing 5 and slides the movable bearing section 6 in the left-right direction, and a pair of front and rear operating shaft sections 8 (corresponding to the operating shaft section and the second operating shaft section) that are journaled on the mounting housing 5 and transmit a rotational driving force to the feed screw section 7. This hanging-side bearing device 2 rotates the feed screw section 7 by rotating the operating shaft section 8, thereby sliding the movable bearing section 6 in the left-right direction relative to the mounting housing 5.

[0031] The mounting housing 5 to the operating shaft 8 will be described in detail below. Fig. 5 is a cross-sectional view taken along line VV in Fig. 3, and Figs. 6 to 8 are cross-sectional views taken along lines VI-VI, VII-VII, and VIII-VIII in Fig. 5, respectively. Fig. 9 is a bottom view showing the mounting housing 5 in an exploded state.

[0032] The mounting housing 5 is a case attached to the upper guide rail 15, and in this embodiment, functions as an end cap for the upper guide rail 15. For this reason, the mounting housing 5 is attached to one end (the left end in FIG. 2 ) of the upper guide rail 15 with a portion of the mounting housing 5 fitted inside the upper guide rail 15. In this embodiment, as clearly shown in FIG. 4 , the mounting housing 5 is configured to include front and rear half halves 5A and 5B that are split into front and rear halves in a vertical cross section including a central axis extending in the left-right direction, and a left outer wall 525 (described later) that is sandwiched between these half halves 5A and 5B. Since the mounting housing 5 is configured to include the front and rear half halves 5A and 5B, the movable bearing unit 6, the feed screw unit 7, and the pair of front and rear operating shaft units 8 can be efficiently housed in a tightly packed state, thereby enabling the mounting housing 5 to be formed compactly. These front and rear half halves 5A, 5B differ only in that they have either a plurality of positioning protrusions 5C or positioning holes 5D into which these positioning protrusions 5C fit, formed on the butt peripheries of each other to position and assemble them; apart from this, they have a symmetrical structure from front to back. These front and rear half halves 5A, 5B are joined together with the left outer wall 525 sandwiched between them, as the positioning protrusions 5C and the positioning holes 5D fit tightly together. Below, this mounting housing 5 will be described in detail with the front and rear half halves 5A, 5B and the left outer wall 525 assembled.

[0033] 5, the mounting housing 5 has a fitting portion 51 at one end in the left-right direction that fits into the upper guide rail 15, and an exposed portion 52 that is continuous with the fitting portion 51 and is exposed from the upper guide rail 15. The mounting housing 5 has a step portion 5E at the boundary between the fitting portion 51 and the exposed portion 52, where the outer shape of the exposed portion 52 in a cross section perpendicular to the central axis is larger than the outer shape of the fitting portion 51, and the tip surface of the upper guide rail 15 abuts against this step portion 5E to be positioned relative to the upper guide rail 15. The mounting housing 5 also houses a movable bearing portion 6 therein so that it can slide in the left-right direction, and also houses a feed screw portion 7 and a pair of front and rear operating shaft portions 8 so that they can rotate.

[0034] The fitting portion 51 includes a base portion 53 that is formed flat in the vertical direction and extends in the left-right direction, and a pair of front and rear protruding legs 54 that extend downward from the underside of one end (the left end in FIG. 3 ) of the base portion 53. The fitting portion 51 fits into the upper guide rail 15 when the base portion 53 is inserted into the upper guide rail 15.

[0035] The base portion 53 has a hollow portion 55 formed in the shape of a flattened rectangular tube, and a tapered portion 56 that closes the opening at the other end of the hollow portion 55 .

[0036] As shown in Figure 7, the hollow portion 55 is formed with a width in the front-to-rear direction that is approximately equal to the width of the upper guide rail 15, and the upper, lower, and front-to-rear side wall portions 55a to 55d form a slide space 53a inside which the bearing plate portion 61 of the movable bearing portion 6, described later, is arranged so that it can slide in the left-to-right direction.

[0037] A guide groove 57 extending in the left-right direction is recessed upward in the central portion of the lower surface of the lower wall portion 55b in the front-to-rear width direction. This guide groove 57 guides the upper hanging-side rotating shaft 11 into the adjustment hole 58. In this embodiment, the guide groove 57 is set larger than the gap width between the front and rear flange portions 153 of the upper guide rail 15. The adjustment hole 58 exposes the bearing hole 6a of the movable bearing portion 6, and one end opens to the guide groove 57 and the other end communicates with the slide space 53a. The adjustment hole 58 is elongated in the left-to-right direction at one end of the guide groove 57 to expose the bearing hole 6a, which slides left and right as the movable bearing portion 6 slides. Therefore, the left-to-right length of the adjustment hole 58 is set according to the sliding range of the bearing hole 6a. The front-to-rear width of the adjustment hole 58 is set to be equal to or larger than the diameter of the bearing hole 6a.

[0038] 7 and 9, in this embodiment, the adjustment hole 58 is formed as an oval hole elongated in the left-right direction, with its front-to-rear width being slightly larger than the diameter of the bearing hole 6a. The adjustment hole 58 penetrates not only the lower wall portion 55b of the hollow portion 55 but also the upper wall portion 55a. Therefore, the tip of the hanging-side rotating shaft 11 abuts against the top wall portion 151 of the upper guide rail 15 through the adjustment hole 58 and the bearing hole 6a.

[0039] In addition, multiple pressure-contact ribs 535 extending in the vertical direction are arranged side by side in the left-right direction on each outer surface of the front and rear side wall portions 55c, 55d, so that the fitting portion 51 is tightly fitted into the upper guide rail 15 in the front-to-back width direction.

[0040] Next, the tapered portion 56 has one end connected to the hollow portion 55 and has a vertically inclined guide surface 56a that slopes upward toward the other end. The vertically inclined guide surface 56a is provided continuous with the guide groove 57, thereby guiding the upper hanging-side rotating shaft 11 into the guide groove 57.

[0041] On the other hand, as clearly shown in FIG. 3 , the upper ends of the pair of protruding legs 54 are the front and rear edges of the inner bottom surface of the guide groove 57 and are connected to the front and rear side edges of the adjustment hole 58. As shown in FIG. 7 , the protruding legs 54 are set so that the distance between them increases downward, forming a generally V-shaped configuration in side view. The pair of protruding legs 54 have scales marked at predetermined intervals on the outer surfaces of their lower ends, allowing the left-right position of the hanging-side rotating shaft 11 to be visually confirmed. Furthermore, as shown in FIG. 8 , one end of each protruding leg 54 is connected to the exposed portion 52 and extends in the left-right direction. The left-right length of each protruding leg 54 is formed to be approximately the same as the left-right length of the adjustment hole 58. This allows the position of the hanging-side rotating shaft 11 to be confirmed based on the area of ​​the base portion 53 where the adjustment hole 58 is formed. The other end surfaces of these protruding leg portions 54 in the left-right direction are configured as front-rear inclined surfaces 54a that incline outward in the front-rear direction toward the other end.

[0042] Next, the exposed portion 52 will be described. As shown in Figures 3 and 6, the exposed portion 52 is formed as a hollow block that is hat-shaped when viewed from the side. This exposed portion 52 houses one end of the movable bearing portion 6 in the left-right direction, as well as the feed screw portion 7 and the pair of front and rear operating shaft portions 8.

[0043] Specifically, exposed portion 52 has front / rear, top / bottom, left / right outer walls 521-526, and has hollow space 52a formed therein. Also, exposed portion 52 has operating shaft holes 52b communicating with hollow space 52a at the front and rear lower corners of one end (the right end in FIG. 4 ). Note that, as described above, left outer wall 525 is clamped between front and rear half halves 5A, 5B in a state where its movement is restricted.

[0044] The hollow space 52a is connected to the slide space 53a of the fitting portion 51, allowing a portion of the bearing plate portion 61 of the movable bearing portion 6 to slide. The hollow space 52a is divided into first to fourth storage spaces 52c to 52f by first to third partition walls 531 to 533, the front and rear side edges of which are connected to the inner surfaces of the front and rear outer walls 521, 522, respectively.

[0045] As shown in FIG. 5 , the first partition wall 531 is disposed facing the inner surface of the upper outer wall 523 and extends from the inner surface of the right outer wall 526 to the center of the hollow space 52a in the left-right direction. The distance between the first partition wall 531 and the upper outer wall 523 is set according to the thickness of the bearing plate portion 61 of the movable bearing unit 6, and in this embodiment, is set to be approximately equal to this thickness. The second partition wall 532 hangs down from a left-side portion of the middle portion of the first partition wall 531 in the left-right direction and is connected to the inner surface of the lower outer wall 524. The second partition wall 532 has a first screw bearing hole 532a in its center that rotatably supports the feed screw unit 7. The first screw bearing hole 532a is formed in a circular shape centered on the central axis of the feed screw unit 7. The third partition wall 533 is disposed opposite the second partition wall 532 in the left-right direction, and extends from the inner surface of the lower outer wall 524 to the tip of the first partition wall 531. Like the second partition wall 532, the third partition wall 533 also has a second screw bearing hole 533a in the center that rotatably supports the feed screw unit 7. The second screw bearing hole 533a is formed in a circular shape centered on the central axis of the feed screw unit 7, and is disposed opposite the first screw bearing hole 532a in the left-right direction. The distance between the third partition wall 533 and the left outer wall 525 is set according to the sliding distance of the movable bearing unit 6, and specifically, is set to a dimension obtained by adding the thickness of the movable bearing unit 6 to the sliding distance.

[0046] Within the hollow space 52a, the space between the third partition wall 533 and the left outer wall 525 forms a first storage space 52c. The second storage space 52d is in communication with the slide space 53a of the fitting portion 51 from the top of the first storage space 52c through the upper part of the first partition wall 531. As shown in FIG. 8, the right end of the second storage space 52d is widened in the front-to-rear direction and is formed to the same width as the slide space 53a. The bearing plate portion 61 of the movable bearing portion 6 slides left and right within the range between the widened right end of the second storage space 52d and the slide space 53a. The third storage space 52e is the space between the second and third partition walls 532, 533, and is in communication with the first storage space 52c through the second screw bearing hole 533a. The fourth storage space 52f is a space between the second partition wall 532 and the right outer wall 526, and communicates with the third storage space 52e through the first screw bearing hole 532a. In this embodiment, a small hole 531a is provided in the first partition wall 531, and the second and third storage spaces 52d, 52e communicate with each other through this small hole 531a.

[0047] A portion of the movable bearing portion 6 is housed in the first and second housing spaces 52c, 52d so as to be slidable left and right. A feed screw portion 7 is rotatably housed in the first, third and fourth housing spaces 52c, 52e, 52f. A pair of front and rear operating shaft portions 8 are rotatably housed in the fourth housing space 52f. The housing modes of each of these housing spaces 52c to 52f will be described later.

[0048] On the other hand, each operating shaft hole 52b functions as a bearing hole for the operating shaft portion 8 and extends obliquely upward in the front-rear direction from the outside of the exposed portion 52 to the fourth storage space 52f. The peripheral edge of the inner opening of the operating shaft hole 52b is configured as a plane whose normal is inclined in the front-rear direction with respect to the up-down direction, and serves as a seating surface 534 for the operating shaft portion 8. In other words, the inclination direction of the normal to this seating surface 534 determines the inclination direction of the axis 8a of the operating shaft portion 8. In this embodiment, the normal to this seating surface 534 is set to be inclined in the front-rear direction with respect to the up-down direction within a plane perpendicular to the left-right direction. Specifically, this will be described later together with the inclination angle of the axis 8a of the operating shaft portion 8. In this embodiment, the front and rear operating shaft holes 52b are arranged in line symmetry with respect to the center line of the exposed portion 52 extending in the up-down direction in a vertical cross section perpendicular to the left-right direction. Therefore, the normal to one seating surface 534 is inclined in the opposite direction in the front-rear direction with respect to the normal to the other seating surface 534.

[0049] Next, the movable bearing portion 6 will be described. As shown in Figures 4 and 5, the movable bearing portion 6 is formed in a generally L-shape when viewed from the front. Specifically, the movable bearing portion 6 includes a bearing plate portion 61 having a bearing hole 6a formed therethrough from top to bottom, a connecting portion 62 connected to the left end of the bearing plate portion 61, and an erected portion 63 extending vertically downward at the right end of the connecting portion 62; in this embodiment, these are integrally formed by bending a plate-like body of a predetermined thickness.

[0050] As shown in FIG. 8 , the bearing plate portion 61 is a rectangular plate-like body elongated in the left-right direction, and has a bearing hole 6a formed in the center that penetrates vertically. The bearing hole 6a is inserted with the hanging-side rotating shaft 11 of the folding door 10 and is slightly larger than the diameter of the upper hanging-side rotating shaft 11. The front-to-rear width of the bearing plate portion 61 is slightly smaller than the front-to-rear width of the sliding space 53a of the fitting portion 51. The left-to-right length of the bearing plate portion 61 is shorter than the combined left-to-right length of the sliding space 53a and the widened right end of the second storage space 52d by the dimension of the sliding range. The connecting portion 62 transmits the driving force input to the standing portion 63 to the bearing plate portion 61. In this embodiment, the connecting portion 62 is a plate-like body whose width is narrower in the front-to-rear direction than the bearing plate portion 61. The standing portion 63 is a plate-like body that is continuous with the connecting portion 62, and has a female threaded hole 631 formed in the center to which the feed screw portion 7 is threaded. As a result, when the feed screw portion 7 rotates forward and backward, the standing portion 63 slides left and right through the female screw hole 631, and accordingly the bearing plate portion 61 also slides left and right through the connecting portion 62.

[0051] This movable bearing portion 6 has the bearing plate portion 61 and connecting portion 62 stored in the sliding space 53a of the fitting portion 51 and the second storage space 52d of the exposed portion 52 so that they can slide left and right, with their front and rear movement restricted, and the upright portion 63 stored in the first storage space 52c of the exposed portion 52 so that they can slide left and right.

[0052] On the other hand, as shown in FIG. 4 , the feed screw unit 7 includes a threaded portion 71 that threads into the female threaded hole 631 of the movable bearing unit 6, a head portion 72 connected to the right end of the threaded portion 71, and a driven bevel gear 73 that protrudes from the right end surface of the head portion 72. The threaded portion 71 is integrally molded from a hard material such as a metal material such as stainless steel or a resin material. The threaded portion 71 has a male thread that threads into the female threaded hole 631 on its outer periphery and is formed to be longer than the sliding range of the movable bearing unit 6. In this embodiment, the threaded portion 71 has a thread groove formed along its entire length, but a cylindrical portion without a thread groove may be formed between the threaded portion 71 and the head portion 72. The head portion 72 has a flat left end surface that serves as a seat surface and has an outer diameter larger than the outer diameter of the second screw bearing hole 533a. The driven bevel gear 73 is for transmitting the rotation of the operating shaft portion 8 to the threaded portion 71, and although a normal straight bevel gear is used here, any known bevel gear such as an obtuse bevel gear, an acute bevel gear, a helical bevel gear, or a spiral bevel gear can be used. The driven bevel gear 73 has a cylindrical portion 731 that is inserted into the first screw bearing hole 532a, and a gear body 732 provided at the tip of the cylindrical portion 731. The cylindrical portion 731 has an outer diameter that is smaller than the outer diameter of the head portion 72 and approximately equal to the outer diameter of the second screw bearing hole 533a, and is rotatably fitted in the first screw bearing hole 532a in the exposed portion 52.

[0053] The feed screw unit 7 is housed in the exposed portion 52 with the right end of the threaded portion 71 and the cylindrical portion 731 journaled to the third partition wall 533 and the second partition wall 532 of the exposed portion 52, respectively. Specifically, the threaded portion 71 is disposed in a state protruding into the first storage space 52c, and the gear body 732 is disposed in a state protruding into the fourth storage space 52f. In this state, the head portion 72 is rotatably housed in the third storage space 52e.

[0054] Next, we will explain the operating shaft 8. The operating shaft 8 is a generally cylindrical body with an expanded diameter at the tip, and is journaled to the mounting housing 5 with its axis 8a tilting in the front-to-rear direction relative to the up-and-down direction, as clearly shown in Fig. 6. Specifically, as shown in Fig. 4, the operating shaft 8 includes a cylindrical operating part 81 inserted into the operating shaft hole 52b of the exposed part 52, and a drive bevel gear 82 connected to the tip of the operating part 81, whose diameter is expanded relative to the outer diameter of the operating part 81, and which meshes with the driven bevel gear 73, and is integrally molded from a metal material such as stainless steel or a hard material such as a resin material.

[0055] The operating unit 81 is a cylindrical body with the central axis being the axis 8a, and has a tool insertion hole 81a formed in its base end surface into which a tool (in this embodiment, a Phillips head screwdriver) is inserted, so that the operating unit 81 can be rotated about the axis 8a with the tool. In this embodiment, the length of the operating unit 81 is set so that the tool insertion hole 81a of the operating unit 81 is at the height position of the front and rear flange portions 153 of the upper guide rail 15 when the operating shaft portion 8 is journaled on the mounting housing 5. By shortening the length of the operating unit 81 in this way, it becomes easier to access the operating unit 81 from below.

[0056] On the other hand, a known bevel gear can be used for the drive bevel gear 82, as with the driven bevel gear 73. The drive bevel gear 82 has an expanded diameter relative to the outer diameter of the operating part 81, and a stepped surface 821 resulting from this expanded diameter is formed in a plane perpendicular to the axis 8a. This stepped surface 821 abuts against the seating surface 534 of the exposed part 52, thereby determining the inclination angle of the axis 8a of the operating shaft part 8. In other words, when the stepped surface 821 abuts against the seating surface 534 of the exposed part 52, each operating shaft part 8 is inclined outward in the front-to-rear direction as the axis 8a points downward, with the operating part 81 pointing toward the door panel 18. Note that "the operating part 81 points toward the door panel 18" simply means toward the door panel 18, not toward the horizontal frame in the vertical direction.

[0057] The inclination angle θ of the axis 8a of each operating shaft portion 8 relative to the vertical line is the same as the inclination angle of the normal line of each seat surface 534 relative to the vertical line. The inclination angle θ of the axis 8a of each operating shaft portion 8 is set so that the extension of the axis 8a is spaced away from the door panel 18 in the closed state, taking into account the thickness of a typical door panel 18 and the installation position of the hanging-side rotation shaft 11 relative to the door panel 18. The axis 8a of each operating shaft portion 8 is inclined toward opposite sides, front to back, and although the inclination angles θ are different in direction, they are set to the same absolute value in this embodiment. In other words, one operating shaft portion 8 is arranged in a symmetrical position relative to the other operating shaft portion 8 in a cross section perpendicular to the left-right direction of the hanging-side bearing 2, with the center line of this cross section as the reference. The inclination angle of this axis 8a is preferably set within the range of 45° to 75°. If the inclination angle of the axis 8a is less than 45°, the extension of the axis 8a of the operating shaft 8 may interfere with the door panel 18, and if it is greater than 75°, it may be difficult to access the operating shaft 8 from below. However, depending on the application and dimensions of the folding door device, it may deviate from this range. In this embodiment, the inclination angle of the axis 8a is set to 60°.

[0058] The hanging-side bearing device 2 having the above-described configuration is assembled, for example, as follows, with reference to FIG.

[0059] First, each operating shaft portion 8 is set in each of the front and rear half halves 5A, 5B of the mounting housing 5. Specifically, the operating portion 81 of the operating shaft portion 8 is inserted into the operating shaft hole 52b from the inside of each of the front and rear half halves 5A, 5B. At this time, as shown in FIG. 6, the stepped surface 821 of the operating shaft portion 8 abuts against the seat surface 534 of the exposed portion 52, and the drive bevel gear 82 is housed in the fourth housing space 52f.

[0060] Separately from the set of the operating shaft 8, the feed screw unit 7 is assembled to the movable bearing unit 6. Specifically, the threaded portion 71 of the feed screw unit 7 is screwed into the female threaded hole 631 of the movable bearing unit 6. At this time, the amount by which the threaded portion 71 of the feed screw unit 7 is screwed is not particularly limited, but it is preferable to screw the threaded portion 71 to about the middle portion in the axial direction.

[0061] Next, the combined movable bearing unit 6 and feed screw unit 7 are set in either the front or rear half halves 5A, 5B of the mounting housing 5. Strictly speaking, each part of the mounting housing 5 in the front or rear half halves 5A, 5B corresponds to either the front or rear half, but in the following, they will be described as each part of the mounting housing 5.

[0062] Specifically, for example, the head portion 72 of the feed screw unit 7 is stored in the third storage space 52e of the rear half 5B of the mounting housing 5. At this time, in the feed screw unit 7, the threaded portion 71 is disposed in the first storage space 52c through the second screw bearing hole 533a, and the driven bevel gear 73 is stored in a state where the cylindrical portion 731 is disposed in the first screw bearing hole 532a and the gear body 732 is meshed with the drive bevel gear 82 in the fourth storage space 52f. Meanwhile, in the movable bearing unit 6, the bearing plate portion 61 is disposed in the second storage space 52d and the slide space 53a, the connecting portion 62 is disposed from the second storage space 52d to the first storage space 52c, and the erected portion 63 is disposed in the first storage space 52c.

[0063] Finally, the front half 5A is assembled to the rear half 5B of the mounting housing 5 with the left outer wall 525 sandwiched between them. Specifically, the positioning protrusion 5C of the front half 5A is tightly fitted into the positioning hole 5D of the rear half 5B to combine them. As a result, the feed screw unit 7 and the operating shaft 8 are rotatably supported on the mounting housing 5 with the driven bevel gear 73 and the drive bevel gear 82 meshed together, respectively. In particular, the operating shafts 8 are housed in the fourth storage space 52f so that the meshed state between the driven bevel gear 73 and the drive bevel gears 82 of the front and rear operating shafts 8 is not released.

[0064] Using the hanging-side bearing fixture 2 assembled in this manner, the folding door device 1 is assembled as follows.

[0065] First, a pair of upper and lower hanging-side rotation shafts 11, 12 are attached to the door panel 18 on the hanging side of the folding door 10. In this embodiment, these rotation shafts 11-14 are attached to the door panel 18 at positions closer to the rear than the center in the thickness direction of the door panel 18 (see Figure 10). Next, the upper runner 13B and lower slider 14B of the door-end-side rotation shafts 13, 14 are supported by the upper guide rail 15 and lower guide rail 16.

[0066] Next, the hanging-side bearing device 2 is attached to the upper guide rail 15. Specifically, the fitting portion 51 of the mounting housing 5 of this hanging-side bearing device 2 is inserted into the left end portion of the upper guide rail 15 until the stepped portion 5E abuts against the left end surface of the upper guide rail 15. In this way, the upper hanging-side bearing device 2 is attached to the upper guide rail 15. Meanwhile, the lower hanging-side bearing device 3 is attached to the lower guide rail 16 with a fixing screw or the like.

[0067] Then, the upper guide rail 15 or the lower guide rail 16 is attached to the underside of the upper frame 15A or the floor surface 16A, respectively. When attaching the upper guide rail 15 to the upper frame 15A, the left end face of the mounting housing 5 is positioned to abut against the vertical frame 17, preventing the upper hanging-side bearing device 2 from accidentally falling off.

[0068] Next, with the door panels 18 of the folding door 10 folded against each other, the folding door 10 is tilted left and right, and the lower hanging-side rotating shaft 12 is first pivotally supported by the lower hanging-side bearing 3. As the folding door 10 is stood up vertically, the hanging-side rotating shaft 11 is inserted into the bearing hole 6a of the movable bearing part 6. At this time, the hanging-side rotating shaft 11 elastically contracts in the axial direction along the inner surface of the top wall part 151 of the upper guide rail 15, and is first guided into the adjustment hole 58 by the upper and lower inclined guide surfaces 56a and guide groove 57 of the mounting housing 5. Furthermore, by standing the door panel 18 up vertically, it reaches the bearing hole 6a of the movable bearing part 6 and elastically recovers, whereby it is pivotally supported in the bearing hole 6a.

[0069] Finally, the door-front side rotation shafts 13, 14 are attached to the door panel 18 on the door-front side, thereby completing the folding door device 1.

[0070] In this state, as shown in Figure 10, the operating shaft 8 is pivotally supported by the mounting housing 5 so that the extension line of the axis 8a is separated from the closed door panel 18 by tilting the axis 8a in the front-to-rear direction relative to the up-and-down direction with the operating part 81 pointing towards the door panel 18, specifically diagonally downward. In other words, the extension line of the axis 8a of the operating shaft 8 is set so as not to interfere with the door panel 18 in the closed state.

[0071] In the folding door device 1 assembled in this way, the door panel 18 may tilt left and right, causing the gap between the vertical frame 17 and the door panel 18 to be uneven in the vertical direction. In this case, the tilt of the door panel 18 can be adjusted by adjusting the hanging side bearing fixture 2, etc. Note that here, only the adjustment of the tilt of the door panel 18 using the upper hanging side bearing fixture 2 will be explained.

[0072] Although the left-right tilt of the door panel 18 can be adjusted with the folding door 10 open, here we will explain how to adjust it with the folding door 10 closed. By adjusting the left-right tilt of the door panel 18 with the folding door 10 closed in this way, the gap between the door panel 18 and the vertical frame 17 can be easily checked, and fine adjustments and other tasks can be performed easily and accurately.

[0073] When adjusting the left-right inclination of the door panel 18, one of the operation parts 81 of the pair of front and rear operation shaft parts 8 is operated from the front or rear side of the folding door 10 in the closed state. In this case, the pair of front and rear operation shaft parts 8 are each provided with an operation part 81 that is rotated at the lower end and a drive bevel gear 82 that meshes with the driven bevel gear 73 at the upper end, and are arranged in line symmetry with each other about the center line of a cross section perpendicular to the left-right direction, so that as described above, the feed screw part 7 can be rotated forward and backward through the operation part 81 of the operation shaft part 8 from either the front or rear side of the folding door 10 in the closed state. Therefore, with this hanging-side bearing device 2, the inclination of the door panel 18 can be adjusted from either the front or rear side of the folding door 10 in the closed state, which is easier to operate than adjusting the inclination of the door panel 18 from only one of the front or rear sides. Furthermore, the pair of front and rear operating shaft portions 8 are arranged in positions that are symmetrical to each other with respect to the center line of the cross section perpendicular to the left-right direction, so that the front and rear inclination angles of each operating shaft portion 8 relative to the up-down direction are approximately the same, and therefore the operating portion 81 of the operating shaft portion 8 can be operated from either the front or rear of the folding door 10 using the same working posture and procedures, etc.

[0074] Specifically, a tool (a Phillips head screwdriver in this embodiment) is inserted into the tool insertion hole 81a of the operating portion 81 of the operating shaft 8 from the axial direction of the operating shaft 8, and the operating portion 81 is rotated forward and backward using the tool to rotate the operating shaft 8. As the operating shaft 8 rotates, the drive bevel gear 82 of the operating shaft 8 also rotates, and the feed screw portion 7 journaled to the mounting housing 5 via the driven bevel gear 73 rotates forward and backward. As the feed screw portion 7 rotates, the movable bearing portion 6, whose threaded portion 71 is threaded into the female threaded hole 631, slides left and right relative to the mounting housing 5, and accordingly, the bearing hole 6a slides left and right while being exposed through the adjustment hole 58. As the bearing hole 6a slides left and right, the hanging-side rotating shaft 11, which is rotatably supported in the bearing hole 6a, also slides left and right, thereby adjusting its position. By adjusting the position of the hanging-side rotation shaft 11, the left-right tilt of the door panel 18 is adjusted, and this makes it possible to uniformly adjust the gap between the door panel 18 and the vertical frame 17 in the vertical direction. Furthermore, by lightly supporting the door panel 18 when rotating the operating part 81 of the operating shaft 8, it is possible to reduce resistance to the rotation operation and make it easier to operate the operating part 81.

[0075]

[0033] That is, the folding door device 1 and the hanging-side bearing device 2 included in this folding door device 1 are equipped with the mounting housing 5, movable bearing unit 6, feed screw unit 7, and operating shaft unit 8 as described above, and therefore, by rotating the operating shaft unit 8 through the operating unit 81, the feed screw unit 7 is rotated, and the feed screw unit 7 can be used to slide and adjust the position of the movable bearing unit 6 relative to the mounting housing 5 in the left-right direction. Therefore, with this hanging-side bearing device 2, there is no need to adjust the position of the hanging-side rotation shaft 11 through operation of the door panel 18, and the position of the hanging-side rotation shaft 11 of the door panel 18, and therefore the left-right tilt of the door panel 18, can be fine-tuned by the simple operation of rotating the operating unit 81. Furthermore, because the rotation of the operating unit 81 is transmitted by the meshing of the drive and driven bevel gears 82 and 73, the axis of the operating shaft unit 8 can be positioned diagonally downward relative to the axis of the feed screw unit 7, which is positioned along the left-right direction, making it easier to operate the operating unit 81 from below.

[0076] Furthermore, with the operating part 81 facing the door panel 18, i.e., downward, the operating shaft part 8 is journaled on the mounting housing 5 so that the extension of the axis 8a is away from the closed door panel 18 by tilting in the front-to-rear direction as it points downward, and therefore a tool can be inserted obliquely from below into the operating part 81 of the operating shaft part 8 and rotated with this tool without interfering with the closed door panel 18. Therefore, with this hanging-side bearing device 2, as mentioned above, even when the door panel 18 is closed, there is no need to insert a tool into the narrow gap between the upper frame 15A and the door panel 18, and the operating part 81 can be easily operated, and the position adjustment of the hanging-side rotation shaft 11, and therefore the left-to-right tilt adjustment of the door panel 18, can be easily performed while checking the gap between the closed door panel 18 and the vertical frame 17.

[0077] In other words, the folding door device 1 and the hanging side bearing device 2 of this embodiment make it possible to finely adjust the left-right position of the hanging side rotating shaft 11, and also allows easy access to the operating part 81 of the operating shaft part 8, thereby effectively improving the workability in adjusting this position.

[0078] In particular, according to the folding door device 1 of this embodiment, the hanging side bearing device 2 is attached to the upper guide rail 15, which makes it look better than when it is attached to the lower guide rail, and since it is less affected by the weight of the door panel 18, the rotation operation of the operating shaft portion 8 can be performed relatively easily.

[0079] The folding door device 1 and the hanging-side bearing device 2 described above are one embodiment of the folding door device and the hanging-side bearing device of the present invention, and their specific configurations can be modified as appropriate without departing from the spirit of the invention. Modifications of this embodiment will be described below.

[0080] (1) In the above embodiment, the case where the hanging base side bearing device 2 is arranged only on the upper horizontal frame (including the upper guide rail 15) has been described, but the hanging base side bearing device of the present invention may be arranged on the lower horizontal frame (including the lower guide rail), or may be arranged on both the upper and lower horizontal frames.

[0081] In addition, in the above embodiment, the upper guide rail 15 is attached to the underside of the upper frame 15A, but in the case of a door panel that extends to the height of the ceiling, such as a so-called high door, the upper guide rail may be embedded in the ceiling.

[0082] (2) In the above embodiment, the hanging-side bearing device 2 of one example of the present invention is applied to a folding door device 1, but this hanging-side bearing device 2 may also be applied to a swing-door device. In this case, as with the folding door device 1, the left-right tilt of the door panel can be finely adjusted, and the workload for this adjustment can be reduced.

[0083] (3) In the above embodiment, the mounting body is provided with a mounting housing 5 that houses the movable bearing portion 6 therein. However, the mounting body may not only house the movable bearing portion, but may also be mounted so that the movable bearing portion is exposed and can slide left and right.

[0084] (4) In the above embodiment, the bearing hole 6a of the movable bearing portion 6 penetrates in the vertical direction, but the bearing hole may be a bottomed hole.

[0085] (5) In the above embodiment, a normal straight bevel gear is used for the driven bevel gear 73 of the feed screw unit 7 and the drive bevel gear 82 of the operating shaft unit 8, and various bevel gears such as obtuse bevel gears, acute bevel gears, helical bevel gears, and spiral bevel gears can be used. For example, by using an acute bevel gear instead of a normal straight bevel gear for the upper hanging-side bearing device 2, the operating shaft can be tilted not only in the front-to-back direction relative to the up-down direction but also in the left-to-right direction, allowing access to the operating shaft from a position away from the vertical frame and further improving operability.

[0086] (6) In the above embodiment, a pair of operating shafts 8 are provided, one at the front and one at the back, but only one may be provided. However, by providing a pair of operating shafts 8, it is possible to rotate each operating shaft 8 from either the front or the back of the door panel 18 in the closed state as described above, thereby improving operability compared to when only one is provided. [Explanation of symbols]

[0087] 1: Folding door device 10: Orido 11: Rotating shaft on the hanging side (upper side) 15A: Upper frame 18: Door 2: Hanging side bearing 5: Mounting housing 58: Adjustment hole 6: Movable bearing part 6a: Bearing hole 7: Feed screw section 71: Threaded part 73: Driven bevel gear 8 :Operation shaft part 8a: Axial center 81 :Operation section 82: Drive bevel gear

Claims

1. In a hanging side bearing device into which a rotating shaft protruding from the hanging side of the door panel is inserted, a mounting body that is attached to the horizontal frame of the door frame; a movable bearing portion having a bearing hole into which the rotating shaft is inserted and attached to the attachment body so as to be slidable in the left-right direction with the bearing hole exposed; a feed screw portion journaled on the mounting body, having a driven bevel gear at one end and a screw portion at the other end that is screwed into the movable bearing portion; an operating shaft portion having an operating portion that is rotatably operated at one end and a driving bevel gear that meshes with the driven bevel gear at the other end, The operating shaft portion is supported by the mounting body so that when the operating portion is pointed toward the door panel, the axis is tilted in the front-to-back direction relative to the up-and-down direction, and the extension line of the axis is moved away from the door panel in the closed state. This is a hanging side bearing device.

2. a second operating shaft portion having a second operating portion at one end thereof that is rotatably operated and a second driving bevel gear at the other end thereof that meshes with the driven bevel gear; The hanging-side bearing device according to claim 1 , wherein the second operating shaft portion is inclined in a direction opposite to that of the operating shaft portion in the front-rear direction.

3. The hanging-side bearing device according to claim 2, wherein the second operating shaft portion is disposed at a position symmetrical to the operating shaft portion in a cross section perpendicular to the left-right direction.

4. The hanging base side bearing device according to any one of claims 1 to 3, The horizontal frame includes an upper guide rail to which the hanging side bearing device is attached; A folding door device comprising a plurality of door panels hingedly connected in the width direction, and a folding door including an upper rotation shaft that protrudes from the upper part of the hanging side door panel among these door panels and is journaled by the hanging side bearing device.

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