Overhead Sliding Door, Installation Method and Maintenance Method of Overhead Sliding Door

Abstract

To provide a top-railed sliding door that is excellent in workability and maintainability.SOLUTION: A top-railed sliding door includes a hanger rail 2, and a door body 1 provided at its upper end face 10 with a plurality of roller assemblies 3 at predetermined intervals. Each roller assembly 3 includes a moving body provided with rollers 30 and capable of rolling in the hanger rail 2, and a roller shaft 4 inserted through an insertion portion 32 of the moving body and extending in the vertical direction; the roller shaft 4 can take a fixed state where a lower part thereof is inserted through the upper end face 10 of the door body 1 and fixed to the upper end face 10, and an unfixed state where the roller shaft can move vertically with respect to the upper end face 10 of the door body 1 and the insertion portion 32; and an insertion hole 200 for the roller shaft 4 is formed in a predetermined portion of an upper surface 20 of the hanger rail 2, and the roller shaft 4 in the unfixed state can move upward through the insertion hole 200.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a top-hung sliding door.

Background Art

[0002] The top-hung sliding door includes a hanger rail extending in the opening width direction and a door body provided with a roller assembly on the upper end surface. The door body opens and closes the opening while being suspended by the hanger rail (Patent Document 1).

[0003] When performing maintenance on the top-hung sliding door, it may be necessary to remove the door body for repair or replacement. However, since the upper end of the door body is fixed to the roller assembly located inside the hanger rail, in the conventional top-hung sliding door, it is necessary to remove the roller assembly in order to remove the door body. In addition, it may be difficult to remove the roller assembly.

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a top-hung sliding door excellent in workability and maintainability.

Means for Solving the Problems

[0005] The first technical means adopted by the present invention is a hanger rail extending in the opening width direction, a door body provided with a plurality of roller assemblies at a predetermined interval on the upper end surface, In a top-hung sliding door comprising: the roller assembly includes a moving body having a roller and capable of rolling inside the hanger rail, a roller shaft extending in the vertical direction by inserting through the insertion portion of the moving body, and comprising The lower part of the roller shaft can be in a fixed state where it passes through the upper end surface of the door body and is fixed to the upper end surface, and a released state where it can move up and down with respect to the upper end surface of the door body and the insertion part. A through-hole for the roller shaft is formed at a predetermined position on the upper surface of the hanger rail. The roller shaft in the released state can move upward through the through-hole. It is an upward-sliding sliding door. In one aspect, the roller shaft in the released state can be pulled out upward from the through-hole. In one aspect, a plurality of the through-holes are formed at the predetermined intervals on the upper surface of the hanger rail.

[0006] In one aspect, when the roller shaft is in the fixed state and the door body is suspended from the hanger rail via the roller assembly, the lower end surface of the door body is spaced from the floor surface. When the roller shaft is in the released state and the door body moves downward with respect to the roller shaft and the lower end surface lands on the floor surface, the lower end of the roller shaft is located below the upper end surface.

[0007] In one aspect, the lower half part including the lower part of the roller shaft is a threaded part. The threaded part includes an upper part located above the upper end surface of the door body and a lower part located below the upper end surface. An upper nut is provided on the upper part. A lower nut is provided on the lower part. By tightening the upper nut and the lower nut and clamping the upper end surface with the upper nut and the lower nut, the roller shaft is in the fixed state.

[0008] In one aspect, the lower nut can be removed from the lower end of the roller shaft. With the lower nut removed, the roller shaft is in the released state and can move upward. The upper nut can be removed from the lower end of the roller shaft with the lower end of the roller shaft located above the upper end surface. The roller shaft can be pulled upward from the insertion hole with the lower nut and the upper nut removed. In one aspect, the lower nut is brought into contact with the lower surface of the upper end face, with the upper nut spaced upward from the upper surface of the upper end face, By tightening the lower nut, the door body can be moved upward in conjunction with the rotation of the lower nut.

[0009] The second technical means adopted by the present invention is a hanger rail extending in the opening width direction, a door body provided with a plurality of roller assemblies on the upper end face, and is an installation method of a suspended sliding door including wherein the roller assembly includes a roller shaft with a screw portion in the lower half, Through an insertion hole formed on the upper surface of the hanger rail, the lower part of the roller shaft is inserted into the door body from the upper end face of the door body with the lower end face placed on the floor surface, By rotating a nut provided at the insertion portion of the roller shaft located within the door body, the door body is moved upward to the suspension position, including.

[0010] In one aspect, through the insertion hole, the roller shaft is inserted into the hanger rail, and the lower part of the roller shaft is inserted into the door body from the upper end face of the door body with the lower end face placed on the floor surface. In one aspect, the roller assembly is inserted into the hanger rail from the longitudinal end, the upper end portion of the roller shaft is moved upward so as to protrude from the insertion hole, and the lower part of the roller shaft is inserted into the door body from the upper end face of the door body with the lower end face placed on the floor surface.

[0011] The third technical means adopted by the present invention is a hanger rail extending in the opening width direction, a door body provided with a plurality of roller assemblies on the upper end face, A maintenance method for a suspended sliding door, comprising: The roller assembly includes a roller shaft having a threaded portion at its lower half, and the suspension position of the door body is determined by a nut provided at the insertion portion of the roller shaft inserted into the door body from the upper end surface of the door body. By rotating the nut, the door body is moved downward so that the lower end surface of the door body is placed on the floor surface. By moving the roller shaft upward through the insertion hole formed on the upper surface of the hanger rail, the insertion state of the lower part of the roller shaft with respect to the upper end surface of the door body is released. Including.

[0012] In one aspect, the method includes a step of pulling out the roller shaft upward from the insertion hole, and after pulling out the roller shaft, removing the moving body (base provided with rollers) of the door body and / or the roller assembly. In one aspect, the method includes a step of removing the door body in a state where the roller shaft has moved upward, and after removing the door body, removing the roller assembly from the longitudinal end of the hanger rail in a state where the roller shaft has moved downward.

Advantages of the Invention

[0013] In the suspended sliding door according to the present invention, an insertion hole is formed on the upper surface of the hanger rail, and the roller shaft of the roller assembly can move upward through the insertion hole. During the installation or maintenance of the suspended sliding door, the upward movement of the roller shaft can be utilized as needed (typically, by inserting the roller shaft from the upper surface of the hanger rail or pulling out the roller shaft from the hanger rail), thereby improving the workability and maintainability.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0015] Embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the hanging sliding door according to this embodiment includes a door body 1 and a hanger rail 2 located above the opening and extending in the opening width direction. The door body 1 is suspended by a plurality of roller assemblies 3 provided at the upper end so as to be movable in the opening width direction with respect to the hanger rail 2. In the illustrated aspect, three roller assemblies 3 are provided at a predetermined interval D1 (see FIG. 1) in the width direction of the door body 1, but the number of roller assemblies 3 is appropriately selected according to the width dimension of the door body 1 and the like, and the number of roller assemblies 3 may be, for example, two. The hanging sliding door according to this embodiment is a single-slide door, but the hanging sliding door may be a double-slide door.

[0016] As shown in FIGS. 4 to 6, the door body 1 includes an upper end surface 10, a lower end surface 11, a door tip side end surface 12, and a door butt side end surface 13, and a reinforcing plate 14 is fixed to the lower surface of the upper end surface 10. An L-shaped guide piece 15 composed of a horizontal piece 150 and a vertical piece 151 is fixed to the lower end surface 11 of the door body 1.

[0017] The door body 1 according to the present embodiment is composed of a main body formed by connecting narrow slats 16 extending in the height direction in the width direction, and an upper frame 10', a lower frame 11', a door tip side vertical frame 12', and a door butt side vertical frame 13' provided at the upper end, lower end, door tip side end, and door butt side end of the main body.

[0018] The upper frame 10', the lower frame 11', the door tip side vertical frame 12', and the door butt side vertical frame 13' have a U-shaped cross-section view including opposing outdoor side finding pieces and indoor side finding pieces, and projecting pieces. The respective projecting surfaces of the upper frame 10', the lower frame 11', the door tip side vertical frame 12', and the door butt side vertical frame 13' are the upper end surface 10, the lower end surface 11, the door tip side end surface 12, and the door butt side end surface 13.

[0019] As shown in FIG. 6, each slat 16 has a U-shaped cross-section view including an outdoor side finding surface 160 and left and right projecting pieces 161, 162. The main body of the door body 1 is formed by overlapping the projecting pieces 161, 162 and connecting them in the width direction. The outdoor side finding surface of the door body 1 is composed of a plurality of outdoor side finding surfaces 160, and the indoor side is in an open shape.

[0020] As shown in FIG. 8, the roller assembly 3 includes a plurality of rollers 30, a base 31 that rotatably supports the rollers 30, a cylindrical insertion portion 32 provided on the base 31, and a roller shaft 4 inserted into the insertion portion 32. In the roller assembly, a moving body 3' is formed by the roller 30, the base 31, and the insertion portion 32, and the moving body 3' and the door body 1 are connected by the roller shaft 4 inserted into the insertion portion 32. In the illustrated aspect, each roller assembly 3 includes four rollers 30, but the number of rollers 30 is not limited.

[0021] The lower part of the roller shaft 4 passes through the insertion holes 100 and 140 (see Fig. 9) formed in the upper end surface 10 of the door body 1 and the reinforcing plate 14, and extends into the door body 1. The insertion holes 100 and 140 are integrated, and an insertion hole is formed in the upper end surface 10 of the door body 1. The roller shaft 4 is a bolt. On the circumferential surface of the lower half part including the lower part of the roller shaft 4, a screw part 40 is formed, and a head 41 is provided at the upper end. In the suspended state of the door body 1, the head 41 of the roller shaft is in contact with the upper end of the insertion part 32. On the roller shaft 4, adjacent to the upper side of the screw part 40, a gripping part 42 having opposing planes is formed.

[0022] As shown in Fig. 12, when the door body 1 is in a suspended state from the hanger rail 2, the screw part 40 consists of an upper part 40A located above the upper end surface 10 of the door body 1 and a lower part 40B located below the upper end surface 10 of the door body 1 and the reinforcing plate 14. The roller assembly 3 further includes an upper nut 5 provided on the upper part of the screw part 40 of the roller shaft 4 and a lower nut 6 provided on the lower part of the screw part 40 of the roller shaft 4. In Fig. 8, a washer 50 is shown as a separate body from the upper nut 5, but the upper nut 5 may be integrated with the washer 50.

[0023] With the lower part of the roller shaft 10 inserted through the upper end surface 10 of the door body 1 and the reinforcing plate 14, the upper end surface 10 and the reinforcing plate 14 are clamped from above and below by the upper nut 5 and the lower nut 6, thereby determining the position of the upper end surface 10 of the door body 1 with respect to the roller shaft 4, fixing the height position of the door body 1 with respect to the roller shaft 4, and bringing the door body 1 into a suspended state. When the door body 1 is in a suspended state, the lower end surface 11 of the door body 1 is spaced above the floor surface FL.

[0024] As shown in Fig. 11, even when the door body 1 moves downward with respect to the roller shaft 4 and the lower end surface 11 is placed on the floor surface FL, the lower end of the roller shaft 4 is located below the upper end surface 10 of the door body 1 and the reinforcing plate 14, and a lower side portion 40B is formed. Therefore, during the installation or maintenance of the top-hung sliding door, the work can be carried out with the door body 1 in the landed state. In addition, when the door body 1 is in the landed state, the lower nut 6 in contact with the lower surface of the reinforcing plate 14 can be rotated to push up the door body 1 with respect to the roller shaft 4 to a suspended state. Also, when the lower nut 6 is rotated, the gripping portion 42 of the roller shaft 4 is gripped with a predetermined tool to fix the roller shaft 4, thereby improving the workability of the rotation operation of the lower nut 6.

[0025] A lower frame 7 extending in the opening width direction is embedded in the floor surface FL, and a guide groove 70 extending in the moving direction of the door body 1 is formed by the lower frame 7. The lower frame 7 extends in the left-right direction so as to be located below the opening (the door body 1 in the opening closed posture) and below the door body 1 in the opening open posture. That is, the lower frame 7 has a length approximately twice the width dimension (opening width dimension) of the door body 1. The upper surface portion 71 of the lower frame 7 is substantially flush with the floor surface FL. When the door body 1 is in the suspended state, the vertical piece 151 of the guide piece 15 fixed to the lower end surface 11 of the door body 1 is located in the guide groove 70, and when the door body 1 moves, the lower end side of the door body 1 is guided along the guide groove 70.

[0026] As shown in Figs. 1 and 2, the opening according to the present embodiment is formed by a door leading side vertical frame 17A, a door trailing side vertical frame 17B, an upper frame 17C, and a floor surface FL. As shown in Figs. 1 and 3, an upper door stop portion 25 is formed at the door trailing side end portion of the hanger rail 2, and a lower door stop portion 72 is formed at the door trailing side end portion of the lower frame 7. When the opening is open, the door trailing side end surface 13 of the door body abuts against the door stop portions 25 and 72 on the door trailing side. When the opening is closed, the door leading side end surface 12 of the door body 1 abuts against the door stop vertical frame 18, and the opening is closed by the door body 1.

[0027] The hanger rail 2 extends in the left - right direction so as to be located above the opening (the door body 1 in the opening - closed posture) and above the door body 1 in the opening - open posture. That is, the hanger rail 2 has a length approximately twice the width dimension (opening width dimension) of the door body 1. As shown in FIG. 7, the hanger rail 2 includes an upper surface 20, an outdoor - side finding surface 21 and an indoor - side finding surface 22 that hang down from the upper surface 20, an outdoor - side horizontal surface 23 formed at the lower end of the outdoor - side finding surface 21, and an indoor - side horizontal surface 24 formed at the lower end of the indoor - side finding surface 22. The upper surfaces of the outdoor - side horizontal surface 23 and the indoor - and - outdoor - side horizontal surface 24 serve as rails on which the rollers 30 of the roller assembly 3 roll. A door - hitting portion 25 is provided at the door - end side end of the hanger rail 2 (FIGS. 1 and 3).

[0028] The height dimension of the internal space of the hanger rail 2, specifically, the vertical dimension between the lower surface of the upper surface 20 and the upper surfaces of the outdoor - side horizontal surface 23 and the indoor - side horizontal surface 24, is a dimension slightly larger than the height dimension of the roller 4, that is, the diameter of the roller 4. The clearance between the dimension of the internal space of the hanger rail 2 and the diameter of the roller 4 is small. When the door body 1 is in a suspended state, by restricting the large upward movement of the roller assembly 3 within the hanger rail 2, it prevents the door body 1 from tilting greatly when the door body 1 is opened and closed. That is, the height dimension of the internal space of the hanger rail is limited.

[0029] The hanger rail 2 is supported by a plurality of mounting brackets 8 at a predetermined portion in the length direction. The mounting bracket 8 has a cross - sectional shape that holds the hanger rail 2, and its upper surface is supported in a protruding manner from the housing (in the illustrated embodiment, the frame body 19A) by an L - shaped support piece 19 fixed to the housing.

[0030] On the upper surface 20 of the hanger rail 2, a plurality of insertion holes 200 are formed between the portions supported by the mounting brackets 8. In the present embodiment, while minimizing the clearance between the lower surface of the upper surface 20 of the hanger rail 2 and the upper end of the roller 30 to suppress the inclination of the door body 1 when the door body 1 is opened and closed, the door body 1 is positioned such that the insertion holes 200 are located directly above the roller shaft 4 of the roller assembly 3, and the upper end portion of the roller shaft 4 is projected upward from the insertion holes 200 on the upper surface 20 of the hanger rail 2 to the upper side of the upper surface 20 of the hanger rail 2, thereby allowing the upward movement of the roller shaft 4.

[0031] In the present embodiment, the number of the insertion holes 200 corresponds to the number of the roller assemblies 3, and the insertion holes 200 are formed at intervals D1. In the present embodiment, by making the interval D1 between the three insertion holes 200 formed on the upper surface 20 of the hanger rail 2 coincide with the interval D1 between the three roller shafts 4 of the three roller assemblies 3, the alignment of the plurality of (three in the illustrated embodiment) roller shafts 4 and the plurality of (three in the illustrated embodiment) insertion holes 200 can be performed simultaneously. That is, by positioning the door body 1 once, the upward movement and insertion and extraction of the plurality of roller shafts 4 through the insertion holes 200 become possible. When connecting the roller assembly 3 to the upper end of the door body 1, the roller shaft 4 is aligned with the insertion holes 100 and 140 formed in the upper end surface 10 of the door body 1. The insertion holes are dimensioned such that the portion of the roller shaft 4 having the largest diameter, that is, the head 41, can be inserted. In the embodiment shown in FIG. 7, the insertion holes 200 are circular, but the insertion holes 200 may be horizontally long oblong holes in the longitudinal direction of the hanger rail 2.

[0032] A cover 9 is provided so as to cover the upper end portion of the upwardly hung sliding door. The cover 9 includes a mounting piece 90 attached to the housing, an upper surface 91 extending downwardly and obliquely from the housing to the outdoor side in a protruding shape, and an outdoor side finding surface 92 hanging down from the outdoor side end portion of the upper surface 91. A lower portion 920 of the outdoor side finding surface 92 is partially detachable from the outdoor side finding surface 92. In the present embodiment, the lower portion 920 of the outdoor side finding surface 92 is detachable using screws.

[0033] By removing the lower part 920 of the outdoor-facing surface 92 of the cover 9, it becomes possible to access the space above the upper end surface 11 of the door body 1 from the outdoor side, and it is possible to rotate the upper nut 5 from the lower end of the roller shaft 4. The indoor side part of the door body 1 is in an open state, and it becomes possible to access the space below the upper end surface 11 of the door body 1 and the reinforcing plate 14 from the indoor side, and it is possible to rotate the lower nut 6. In one aspect, the cover 9 is detachably attached to the housing. When maintaining the hanging sliding door, when pulling out the roller shaft 4 upward from the insertion hole 200 on the upper surface 20 of the hanger rail 2, and when inserting the roller shaft 4 into the insertion part 32 of the moving body 3' in the hanger rail 2 from the insertion hole 200 on the upper surface 20 of the hanger rail 2, the cover 9 can be removed from the housing to secure a space above the upper surface 20 of the hanger rail 2 for the operation.

[0034] With reference to FIGS. 1, 2, 9 to 12, the installation method of the hanging sliding door according to the present embodiment will be described.

[0035] As shown in FIGS. 1 and 2, the housing is formed with an opening by the door tip side vertical frame 17A, the door butt side vertical frame 17B, the upper frame 17C, and the floor surface FL. The lower frame 7 is embedded in the floor surface FL adjacent to the outdoor side of the lower part of the opening. A door stop vertical frame 18 is erected adjacent to the outdoor side of the door tip side vertical frame 17A. The door tip side end of the lower frame 7 is located on the door stop vertical frame 18, and a door stop portion 72 is provided at the door butt side end of the lower frame 7. A plurality of support pieces 19 are fixed at intervals in the opening width direction on the finding surface of the frame body 19A attached above the upper frame 17C, and the hanger rail 2 is supported by the mounting brackets 8 provided on each support piece 19, thereby attaching the hanger rail 2.

[0036] As shown in Fig. 9, the roller assembly 3 is prepared in a disassembled state into a moving body 3' composed of a roller 30 and a base 31 (including an insertion portion 32), a roller shaft 4, an upper nut 5, and a lower nut 6. Below the insertion hole 200 formed in the upper surface 20 of the hanger rail 2, the insertion holes 100 and 140 formed in the upper end surface 11 of the door body 1 are positioned, and the vertical piece 15 of the guide piece 15 provided on the lower end surface 11 is inserted into the guide groove 70 of the lower frame 7, and the lower end surface 11 is placed on the floor surface FL. In the present embodiment, in a state where the lower end surface 11 is placed on the floor surface FL, the horizontal piece 150 of the guide piece 15 abuts against the upper surface portion 71 of the lower frame 7. The moving body 3' is inserted into the hanger rail 2 from the longitudinal end of the hanger rail 2, and the moving body 3' is moved so that its insertion portion 32 is below the insertion hole 200 in the upper surface 20 of the hanger rail 2 and above the insertion holes 100 and 140 formed in the upper end surface 11 of the door body 1.

[0037] As shown in Fig. 10, in a state where the insertion portion 32 of the base 31 of the moving body 3' of the roller assembly 3 is positioned below the insertion hole 200 in the upper surface 20 of the hanger rail 2, the roller shaft 4 is inserted downward through the insertion hole 200, and before inserting the lower end of the roller shaft 4 from the upper end surface 10 of the door body 1, the upper nut 5 is attached to the lower part of the roller shaft 4 from the lower end of the roller shaft 4.

[0038] Note that the roller assembly 3 in which the roller shaft 4 is inserted into and incorporated in the insertion portion 32 of the moving body may be inserted into the hanger rail 2 from the longitudinal end of the hanger rail 2 and moved to a predetermined position, the roller shaft 4 may be moved upward so that the upper end portion protrudes from the insertion hole 200 in the upper surface 20 of the hanger rail 2, and the upper nut 5 may be attached to the lower part of the roller shaft 4 from the lower end of the roller shaft 4 to obtain the state shown in Fig. 10.

[0039] As shown in FIG. 11, the lower part of the roller shaft 4 provided with the upper nut 5 at the lower part is inserted into the door body 1 through the upper end surface 10 and the reinforcing plate 14 of the door body 1. A lower nut 6 is provided at the insertion part (lower part 40B) of the roller shaft 4 located below the upper end surface 10 and the reinforcing plate 14, and the lower nut 6 is brought into contact with the lower surface of the reinforcing plate 14. In this state, the lower end surface 11 (horizontal piece 150) of the door body 1 remains in a state of being placed on the upper surface part 71 of the lower frame 7.

[0040] As shown in FIG. 12, the lower nut 6 is rotated and moved upward along the lower part 40B of the roller shaft 4, and the door body 1 is moved upward through the reinforcing plate 14 and the upper end surface 10. When the door body 1 moves upward, the lower end surface 11 of the door body 1 is separated upward from the floor surface FL, and the door body 1 is in a suspended state. When the upper end surface 11 of the door body 1 abuts against the upper nut 5, the upward movement of the door body 1 is restricted. The position of the upper nut 5 may be determined in the state of FIG. 10, or may be determined in the state of FIG. 11.

[0041] The maintenance method of the upward-suspended sliding door according to this embodiment will be described. When maintaining the upward-suspended sliding door, it is necessary to remove the door body 1 and / or the roller assembly 3. However, in this embodiment, the process of removing the door body 1 and the roller assembly 3 is substantially the reverse process of the installation process of the upward-suspended sliding door. Therefore, in the following description, FIGS. 9 to 12 will be referred to as appropriate.

[0042] In the state of FIG. 12, when the lower nut 6 is rotated and the lower nut 6 is moved downward with respect to the lower part of the roller shaft 4, the door body 1 moves downward, and the lower end surface 11 (horizontal piece 150) abuts against and is placed on the floor surface FL (the upper surface part 71 of the lower frame 7 in this embodiment), and the state of FIG. 11 is obtained.

[0043] In the state of FIG. 11, remove the lower nut 6 from the lower end of the roller shaft 4 (see FIG. 10), then move the roller shaft 4 upward so that the lower end is positioned above the upper end surface 11 of the door body 1, remove the upper nut 5 from the lower end of the roller shaft 4, and further move the roller shaft 4 upward to remove it from the insertion hole 200 on the upper surface 20 of the hanger rail 2 to make it in the state of FIG. 9. By removing the roller shaft 4, the door body 1 can be removed, and the moving body 3' of the roller assembly 3 can be removed from the longitudinal end of the hanger rail 2.

[0044] When maintaining the top-hung sliding door, it is not always necessary to remove the roller shaft 4. In the state of FIG. 11, remove the lower nut 6 from the lower end of the roller shaft 4 and move the roller shaft 4 upward to protrude the upper end portion of the roller shaft 4 from the insertion hole 200 on the upper surface 20 of the hanger rail 2, and move it upward until the lower end of the roller shaft 4 is positioned above the upper end surface 11 of the door body 1. By releasing the insertion state of the lower portion of the roller shaft 4 with respect to the upper end surface 11 of the door body 1, the upper end side of the door body 1 becomes free, and with a predetermined clearance generated between the lower end of the roller shaft 4 and the upper end surface 11 of the door body 1, the door body 1 can be tilted and removed from the opening. With the door body 1 removed, the roller shaft 4 can be moved downward until the upper end is below the upper surface 20 of the hanger rail 2, and the roller assembly 3 can be removed from the longitudinal end of the hanger rail 2.

[0045] When it is desired to replace the door body 1 of the top-hung sliding door, in the suspended state of FIG. 12, remove the lower nut 6 from the roller shaft 4, move the roller shaft 4 upward while protruding the upper end portion of the roller shaft 4 upward from the upper surface 20 of the hanger rail 2, and position the lower end of the roller shaft 4 above the upper end surface 11 of the door body 1 (typically, remove the upper nut 5 from the roller shaft 4 and further pull out the roller shaft 4 from the hanger rail 2), and by releasing the engagement state of the lower end of the roller shaft 4 with respect to the upper end surface 11 of the door body 1, separate the roller shaft 4 and the door body 1, and remove the vertical piece 151 of the guide piece 15 at the lower end of the door body 1 from the guide groove 70 of the lower frame 7 to remove the door body 1.

[0046] Next, prepare a new door body 1. With the lower end surface 11 of the door body 1 placed on the floor surface FL, position the lower end of the roller shaft 4 of the roller assembly 3 directly above the upper end surface 11 and the insertion holes 100 and 140 of the reinforcing plate 14 (see Fig. 10). At this time, the upper end portion of the roller shaft 4 protrudes upward from the insertion hole 200 formed on the upper surface 20 of the hanger rail 2, and an upper nut 5 is attached to the lower portion of the roller shaft 4. From the state shown in Fig. 10, move the roller shaft 4 downward and insert the lower portion into the door body 1 through the insertion holes 100 and 140. Attach a lower nut 6 to the lower side portion 40B of the threaded portion 40 of the roller shaft 4, and rotate the lower nut 6 to push up the door body 1 to suspend the door body 1 (Figs. 11 and 12).

[0047] When it is desired to replace the entire or a part (e.g., the moving body 3' or the roller 30 of the moving body 3') of the roller assembly 3 of the top-hung sliding door, in the suspended state shown in Fig. 12, remove the lower nut 6 from the roller shaft 4, move the roller shaft 4 upward while protruding the upper end portion of the roller shaft 4 upward from the upper surface 20 of the hanger rail 2, position the lower end of the roller shaft 4 above the upper end surface 11 of the door body 1, remove the upper nut 5 from the roller shaft 4, and move the lower end of the roller shaft 4 upward at least above the insertion portion 32 of the roller assembly 3 (typically, pull it out from the hanger rail 2). By releasing the engagement state of the lower end of the roller shaft 4 with respect to the insertion portion 32 of the roller assembly 3, the moving body 3' and the roller shaft 4 are separated, and the moving body 3' of the roller assembly 3 can move along the hanger rail 2, and the moving body 3' is removed from the longitudinal end of the hanger rail 2.

[0048] Alternatively, when the roller shaft 4 is moved upward to remove the door body 1, after removing the door body 1, move the roller shaft 4 downward and insert it into the insertion portion 32 so that the head 41 abuts against the upper end of the insertion portion 32, and the roller assembly 3 may be removed from the longitudinal end of the hanger rail 2.

[0049] Prepare a new moving body 3´, insert it from the longitudinal end of the hanger rail 2, move it to the position corresponding to the insertion hole 200 on the upper surface 20 of the hanger rail 2, insert the roller shaft 4 through the insertion hole 200, and insert it into the insertion part 32 of the moving body 3´. Thereafter, following the installation process of the door body 1 described above, the lower part of the roller shaft 4 is attached to the upper end of the door body 1.

[0050] When the door body 1 is also removed, in the state where the door body 1 is removed, prepare a new roller assembly 3, insert it from the longitudinal end of the hanger rail 2, move it to the position corresponding to the insertion hole 200 on the upper surface 20 of the hanger rail 2, move the roller shaft 4 upward through the insertion hole 200 to make it in the state of Fig. 10. Thereafter, following the installation process of the door body 1 described above, the lower part of the roller shaft 4 is attached to the upper end of the door body 1.

Explanation of Signs

[0051] 1 Door body 10 Upper end face 11 Lower end face 15 Guide piece 150 Horizontal piece 151 Vertical piece 2 Hanger rail 20 Upper surface 200 Insertion hole 3 Roller assembly 3´ Moving body 30 Roller 31 Base 32 Insertion part 4 Roller shaft 40 Screw part 5 Upper nut 6 Lower nut 7 Lower frame 70 Guide groove 71 Upper surface part FL Floor surface

Claims

1. A hanger rail extending in the opening width direction, A door body having a plurality of roller assemblies at a predetermined interval on the upper end surface, In a hanging sliding door provided with, The roller assembly includes, A moving body having a roller and capable of rolling within the hanger rail, A roller shaft extending in the vertical direction through the insertion portion of the moving body, Comprising, The lower part of the roller shaft can be in a fixed state where it passes through the upper end surface of the door body and is fixed to the upper end surface, and a release state where it can move up and down with respect to the upper end surface of the door body and the insertion portion, At a predetermined portion on the upper surface of the hanger rail, an insertion hole for the roller shaft is formed, and the roller shaft in the release state can move upward through the insertion hole, Hanging sliding door.

2. On the upper surface of the hanger rail, a plurality of the insertion holes are formed at the predetermined interval, The hanging sliding door according to Claim 1.

3. When the roller shaft is in the fixed state and the door body is suspended from the hanger rail via the roller assembly, the lower end surface of the door body is separated from the floor surface, When the roller shaft is in the release state and the door body moves downward with respect to the roller shaft and the lower end surface lands on the floor surface, the lower end of the roller shaft is located below the upper end surface, The hanging sliding door according to any one of Claims 1 and 2.

4. A hanger rail extending in the opening width direction, A door body having a plurality of roller assemblies on the upper end surface, In a method for installing a hanging sliding door provided with, The roller assembly includes a roller shaft whose lower half portion is a threaded portion, Through the insertion hole formed on the upper surface of the hanger rail, the lower part of the roller shaft is inserted into the door body from the upper end surface of the door body with the lower end surface placed on the floor surface, By rotating a nut provided at the insertion portion of the roller shaft located within the door body, the door body is moved upward to the suspension position, Method for installing a hanging sliding door.

5. A hanger rail extending in the opening width direction, A door body having a plurality of roller assemblies on the upper end surface, In a maintenance method for a hanging sliding door provided with, The roller assembly includes a roller shaft whose lower half portion is a threaded portion, and the suspension position of the door body is determined by a nut provided at the insertion portion of the roller shaft inserted into the door body from the upper end surface of the door body, By rotating the nut, the door body is moved downward to place the lower end surface of the door body on the floor surface, By moving the roller shaft upward through the insertion hole formed on the upper surface of the hanger rail, the insertion state of the lower part of the roller shaft with respect to the upper end surface of the door body is released. including A maintenance method for a hanging sliding door.

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