Sliding door device

Abstract

To improve stability of a sliding door 10.SOLUTION: The sliding door device comprises: the sliding door 10 that opens / closes an opening Wa; a guide rail 31 arranged in an opening direction K of the sliding door 10 without extending to the opening Wa; a suspension roller 21 suspending a door tail side of the sliding door 10, which runs along the guide rail 31; a door roller 22 that supports a door end side of the sliding door 10 and runs on a floor F; and an upper guide roller 33 and a lower guide roller 34 that brace the sliding door 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a so-called gate-type sliding door device that does not require an upper frame or upper rail for use in openings in the walls of buildings, freestanding partitions, low partitions, etc. [Background technology]

[0002] A gate-type sliding door device has been proposed (for example, Patent Document 1).

[0003] A conventional gate-type sliding door device is configured by providing rollers on the leading and trailing ends of a sliding door that opens and closes an opening, arranging a guide rail along the wall surface in the direction in which the sliding door opens, and engaging multiple guide pins protruding from the upper end surface of the trailing end of the sliding door with the guide rail so that the sliding door does not tip over. Therefore, the sliding door can smoothly open and close an opening even if the guide rail does not extend into the opening. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-110178 Summary of the Invention [Problem to be solved by the invention]

[0005] In such conventional technology, the sliding door is prevented from falling over only by the guide pin on the top end surface of the door tail engaging with the guide rail on the wall surface on the opening direction side, so the stability of the sliding door is not necessarily sufficient, and there is a problem that the effective width of the opening and the height of the sliding door are unnecessarily restricted, which tends to limit the range of application.

[0006] Therefore, in view of the problems of the prior art, the object of the present invention is to provide a sliding door device that can improve the stability of the sliding door and expand the range of applications by combining an upper guide roller and a lower guide roller for vibration prevention with a sliding door that has a hanging wheel on the door trailing side and a door roller on the door leading side. [Means for solving the problem]

[0007] To achieve this object, the present invention is configured to include a sliding door that opens and closes an opening, a guide rail that is arranged in the opening direction of the sliding door without extending into the opening, a hoist that suspends the trailing edge of the sliding door and runs along the guide rail, a door roller that supports the leading edge of the sliding door and runs on the floor, and upper and lower guide rollers for the sliding door, the lower guide roller being positioned closer to the trailing edge than the upper guide roller, and the upper and lower guide rollers respectively engage with the upper and lower edge parts of the sliding door so as to be able to move relatively freely throughout the entire opening and closing stroke of the sliding door, thereby preventing the sliding door from vibrating.

[0008] The sliding door may incorporate a pair of door stops that abut either the upper guide roller or the lower guide roller in common or individually to determine the fully closed and fully open positions of the sliding door.

[0009] The upper guide roller may be disposed immediately adjacent to the opening on the side in the opening direction of the sliding door, or may be suspended from the tip of the guide rail on the door edge side.

[0010] Furthermore, a flat rail for the door rollers may be laid on the floor, and the flat rail may have a guide groove for guiding the door rollers. [Effects of the Invention]

[0011] With this configuration, the sliding door is always restrained laterally, perpendicular to the opening and closing direction, at four points throughout the entire opening and closing stroke: the hanging roller at the tail end, the roller at the leading end, and the upper and lower guide rollers in the middle. This allows the sliding door to easily achieve sufficient stability not only during opening and closing operations, but also in the fully closed and fully open positions, eliminating the risk of unnecessary restrictions on its range of application. The upper and lower guide rollers are fixedly positioned at an appropriate horizontal distance within the overlapping area of the sliding door that overlaps with the wall in the opening direction when the sliding door is in the fully closed position. Furthermore, when the sliding door is in the fully open position, the leading end of the door protrudes into the opening by a predetermined amount, exposing, for example, a handle mounted on the leading end or cushioning material on the leading end of the door.

[0012] If a door stop that determines the fully closed and fully open positions of the sliding door is built into the sliding door, there is no need to provide a separate door stop or a mullion for the door stop externally, and the overall appearance can be improved. Note that it is preferable that the pair of door stops provided inside the sliding door abut against the upper guide roller in common, but it is also possible to abut against the lower guide roller in common, and furthermore, they may abut against the upper guide roller and the lower guide roller individually.

[0013] By arranging the upper guide roller closest to the opening on the side in the opening direction of the sliding door, it can be placed closest to the leading edge of the sliding door in the fully closed position, thereby further improving the stability of the sliding door in the fully closed position or a position close to the fully closed position. Note that it is preferable that the upper guide roller is installed hanging downward from the leading edge of the guide rail that extends to the closest to the opening.

[0014] By laying flat rails for door rollers on the floor, the door rollers can run more smoothly and the operating feel of the sliding door can be improved, and the flat rails with guide grooves can prevent the door rollers from coming off and further improve the stability of the sliding door. [Brief explanation of the drawings]

[0015] [Figure 1] Overall configuration schematic front view [Figure 2] Overall structure schematic cross-sectional view [Figure 3] Schematic operation diagram [Figure 4] Enlarged cross-sectional view of Fig. 1 taken along the arrow AA [Figure 5] Enlarged cross-sectional view of Fig. 1 taken along arrow B. [Figure 6] Enlarged cross-sectional view of Figure 1 taken along the CC arrow [Figure 7] Enlarged explanatory diagram of the main parts of Figures 1 and 2 DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the invention will be described with reference to the drawings.

[0017] The sliding door device is comprised of a sliding door 10, whose main component is a sliding door that opens and closes an opening Wa between two walls W (Figs. 1 and 2). In Figs. 1 and 2, the sliding door 10 is shown in both a fully closed position (solid line) and a fully open position (chain double-dashed line). Each wall W may be a freestanding partition, low partition, or the like, in addition to being a building structure.

[0018] The trailing edge of the sliding door 10 is suspended by a hoist 21 that runs along a guide rail 31, and the leading edge is supported by a door roller 22 that runs on the floor F via a flat rail 32. The sliding door 10 is also combined with an upper guide roller 33 and a lower guide roller 34.

[0019] The sliding door 10 is set so that width b>a, with respect to the opening width a of the opening Wa (Fig. 3). When the sliding door 10 is in the fully open position (dashed line in Fig. 3), the door tip protrudes into the opening Wa from the tip of the wall W on the opening direction K side by an amount equivalent to the remaining distance c, allowing the opening Wa to be opened to an effective width d=ac. When the sliding door 10 is in the fully closed position (solid line in the same figure), the door tip forms an overlap e on the door tail side that overlaps with the wall W on the opening direction K side, and the door tip slightly extends beyond the tip of the wall W on the opposite side of the opening direction K, allowing the opening Wa to be fully closed. The opening / closing stroke f of the sliding door 10 is given by the equation: width b=c+e+f.

[0020] The sliding door 10 is constructed by attaching surface materials 12, 12 to both sides of a paper honeycomb core material 11 (Fig. 4). Channel-shaped cross members 13, 14 are attached to the upper and lower edge portions of the sliding door 10 facing upward and downward, respectively (Figs. 1 and 4). The upper and lower edges of each surface member 12 cover the sides of the cross members 13, 14, respectively, and are bent inward at the upper edge of the cross member 13 and the lower edge of the cross member 14. However, the upper edge of each surface member 12 is bent inward in areas other than the tip end on the door tail side of the sliding door 10 where the hoist 21 is attached, forming a double downward fold portion 12a (Figs. 1, 5, and 6), and a slit 12b is formed between the fold portions 12a, 12a.

[0021] A handle member 16 for handling and a cushion material 17 are attached to the door end side of the sliding door 10 via a vertical member 15 (Fig. 1, Fig. 7(A) and (B)). The side edges of each surface member 12 are folded inward into the storage section on the side of the vertical member 15, and the handle member 16, which is an extruded profile, is screwed together with upper and lower end covers 16a and 16a via set screws 16b and 16b. The cushion material 17 is also resiliently attached to the leading edge of the handle member 16. Note that Fig. 7(A) and (B) are enlarged views of the main parts of Fig. 1 and Fig. 2, respectively. A cover material 19 is attached to the door end side of the sliding door 10 via a vertical member 18 of the same shape as the vertical member 15 on the door end side (Fig. 1 and Fig. 2).

[0022] The carriage 21b of the hoist 21 on the door trailing side of the sliding door 10 is connected to a connecting block 21a installed within the cross member 13 at the upper edge of the sliding door 10 (FIGS. 1 and 4). The guide rail 31 on which the hoist 21 runs is disposed along the wall W on the side of the opening direction K of the sliding door 10, and is fixed to the surface of the wall W via a bracket 31a with a generally inverted L-shaped cross section, set screws 31b, 31b, and a machine screw 31c. A cover material 31d is attached to the guide rail 31 via a set screw 31e. The tip of the guide rail 31 on the door leading side does not extend into the opening Wa, but extends to the immediate vicinity of the opening Wa. However, both ends of the guide rail 31 are closed by end covers 31f (FIGS. 1 and 5).

[0023] Damper devices 35 are installed symmetrically at the leading end and trailing end of the guide rail 31 (Figs. 1 and 4). Each damper device 35 is attached to the carriage 21b of the hoist 21 and has an upward connecting pin 21d at the tip of an adapter member 21c that protrudes toward the leading end. The upward connecting pin 21d at the tip of the adapter member 21c advances in the opening / closing direction of the sliding door 10 and automatically engages with the sliding door 10, thereby appropriately braking the sliding door 10 as it approaches the fully closed or fully open position and smoothly retracting it into the fully closed or fully open position to stop it in place. That is, each damper device 35 compactly incorporates a damper mechanism for braking and a spring mechanism for retracting, in addition to an automatic engagement / disengagement mechanism with the connecting pin 21d.

[0024] The door roller 22 on the door edge side of the sliding door 10 is incorporated into the door edge side of the cross member 14 at the lower edge of the sliding door 10 via a frame-shaped reinforcing member 22a (Figs. 1 and 6). On the outer periphery of the door roller 22, a guide rib 22b that fits into the guide groove 32a of the flat rail 32 is formed, and the flat rail 32 is fixed onto the floor F via set screws 32b, 32b... at both ends (Figs. 5 and 6).

[0025] The upper guide roller 33 is disposed immediately adjacent to the opening Wa on the opening direction K side of the sliding door 10 (Figs. 1 and 5). The upper guide roller 33 is suspended from the leading end of the guide rail 31 via a bracket 33a that is screwed into the guide rail 31, and hangs downward within the cross member 13 at the upper edge of the sliding door 10 and rotates horizontally forward and backward, thereby engaging relatively movably with the cross member 13 throughout the entire opening and closing stroke f of the sliding door 10 and preventing the sliding door 10 from vibrating.

[0026] A pair of door stops 36, 37 corresponding to the upper guide roller 33 are built into the horizontal member 13 at the upper edge of the sliding door 10. The door stop 36 is an L-shaped member that is screwed to the bottom surface of the horizontal member 13 via set screws 36a, 36a, and abuts against the upper guide roller 33 from the door trailing edge side to determine the fully closed position of the sliding door 10. In addition, the door stop 37 is formed by closing the door trailing edge side of a downward channel-shaped member (FIGS. 1 and 6), and is screwed to the bottom surface of the horizontal member 13 via set screws 37a, and abuts against the upper guide roller 33 from the door leading edge side to determine the fully open position of the sliding door 10. In other words, the door stops 36, 37 abut against the upper guide roller 33 in common to determine the fully closed and fully open positions of the sliding door 10.

[0027] The door stops 36, 37 may be installed inside the cross member 14 at the lower edge instead of inside the cross member 13 at the upper edge, and may both abut against the lower guide roller 34. Alternatively, one of the door stops 36, 37 may be installed inside the cross member 13 at the upper edge and abut against the upper guide roller 33, and the other may be installed inside the cross member 14 at the lower edge and abut against the lower guide roller 34, so that they abut against the upper guide roller 33 or the lower guide roller 34 individually.

[0028] The lower guide roller 34 is installed facing upward on the floor F so as to correspond to the hoist 21 of the sliding door 10 in the fully closed position (Figs. 1 and 4). The lower guide roller 34, together with the upper guide roller 33, is located within the range of the overlapping margin e of the sliding door 10, and does not necessarily have to correspond to the hoist 21 in the fully closed position as long as it is separated from the upper guide roller 33 by an appropriate predetermined horizontal distance toward the door tail. The lower guide roller 34 protrudes into the cross member 14 at the lower edge of the sliding door 10, utilizing a shaft 34c on a base member 34a fixed via anchor bolts 34b, 34b. The lower guide roller 34 rotates horizontally in both forward and reverse directions within the cross member 14, thereby engaging with the cross member 14 so as to be relatively movably relative to it throughout the entire opening and closing stroke f of the sliding door 10 and preventing the sliding door 10 from vibrating.

[0029] The sliding door 10 can be easily opened and closed via the hanging roller 21 on the trailing edge side and the roller 22 on the leading edge side, and can easily achieve sufficient stability by effectively preventing vibrations throughout the entire opening and closing stroke f, including the fully closed and fully open positions, via the upper guide roller 33 and lower guide roller 34. In addition, because the trailing edge side of the sliding door 10 is suspended from above, the effect of unevenness in the floor F can be kept to a minimum.

[0030] In the above description, the door roller 22 may roll directly on the floor F, omitting the flat rail 32. In this case, however, the door roller 22 should not have the guide rib 22b on the outer periphery, and should be formed flat so that almost the entire width of the outer periphery is in contact with the floor F.

[0031] In addition, instead of the illustrated type in which the hoist 21 runs inside the guide rail 31, it may also be a type in which grooved wheels are hung in a cantilevered manner on an upward single-track rail formed in the guide rail 31 and run on it.

[0032] The sliding door 10 can also be configured as a sliding door device for two sliding doors by combining two single sliding doors as shown in the figure in a symmetrical configuration.

[0033] Furthermore, instead of the illustrated outset type that opens and closes along the surface of the wall W on the opening direction K side, the sliding door 10 may be configured as an inset type that opens and closes by being pulled into the interior or thickness of the wall W. [Industrial Applicability]

[0034] This invention provides a sliding door with a hoisting wheel at the tail end and a roller at the front end, and combines upper and lower guide rollers to prevent vibration, thereby improving the stability of the sliding door and expanding its range of application, making it suitable for a wide range of uses for opening and closing openings in the walls of any building, freestanding partitions, low partitions, etc. [Explanation of symbols]

[0035] Wa…opening K...Opening direction f...Opening and closing stroke 10...Sliding door 21...hanging wheel 22... Door roller 31...Guide rail 32...Flat rail 32a...Guide groove 33...Upper guide roller 34...Lower guide roller 36, 37...Doorstop Patent applicant: Komatsu Wall Industry Co., Ltd.

Claims

1. a sliding door device comprising: a sliding door that opens and closes an opening; a guide rail that is disposed in the opening direction of the sliding door without extending into the opening; a hoist that suspends the trailing edge of the sliding door and runs along the guide rail; a door roller that supports the leading edge of the sliding door and runs on the floor; and upper and lower guide rollers for the sliding door, wherein the lower guide roller is disposed closer to the trailing edge than the upper guide roller, and the upper and lower guide rollers respectively engage with the upper and lower edge portions of the sliding door so as to be relatively movable throughout the entire opening and closing stroke of the sliding door, thereby preventing the sliding door from vibrating.

2. 2. The sliding door device according to claim 1, wherein the sliding door has a pair of built-in door stops that abut against either the upper guide roller or the lower guide roller in common or individually to determine the fully closed position and the fully open position of the sliding door.

3. 3. The sliding door device according to claim 1, wherein the upper guide roller is disposed immediately adjacent to an opening on a side in the opening direction of the sliding door.

4. 4. The sliding door device according to claim 1, wherein the upper guide roller is vertically disposed at a tip end of the guide rail on the door edge side.

5. 5. The sliding door device according to claim 1, wherein the flat rail for the door roller is laid on a floor.

6. 6. The sliding door device according to claim 5, wherein the flat rail has a guide groove for guiding the door roller.

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