Overhead door

Abstract

To improve wind pressure resistance performance by making a guide rail have a characteristic shape.SOLUTION: A guide rail 2 comprises: a first site G1 extending in a height direction of an opening; a second site G2 with a curved shape, which extends backward from upper side of the first site toward indoor side; and a third site extending backward along a ceiling from backside of the second site. When the opening is fully closed, guide rollers 11 on both ends in a width direction are located at the first site G1 and a lower half part of the second site G2, which causes a door body D to be restrained by the guide rail 2. The guide rail 2 comprises: a main guide part that is guided in a state where the guide rollers 11 are engaged when the door body D moves up or down; and a sub-guide part that faces the main guide part and allows the guide rollers 11 to slide thereon. A slip-out preventive part (inner depth side 25) facing an inner lateral surface of the guide roller 11 is provided on the sub-guide part at least at the first site G1 and the lower half part of the second site G2.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an overhead door, and more particularly to an overhead door having a distinctive guide rail configuration. [Background technology]

[0002] Overhead doors are known as fixtures installed in building openings that connect the indoor and outdoor areas of buildings such as warehouses and garages. The door body of an overhead door is formed by connecting multiple sections, and guide rollers are provided at both ends of the width of each section. The guide rollers are guided by left and right guide rails to move up and down, opening and closing the building opening.

[0003] The configuration of a conventional overhead door is disclosed in Patent Document 1. As shown in Patent Document 1 (Fig. 3) and Fig. 15 of the present application, the outdoor side of the guide rail 2 (guide roller 11') on which the conventional guide roller 11' can slide is flat, and as shown in Fig. 15, when the door body of the overhead door in the fully closed position of the opening is subjected to high wind pressure, the center part in the width direction of each section bends, and the guide roller and both ends in the width direction of the section become misaligned, causing an even greater amount of bending, and there is a risk that the designed wind pressure resistance performance will not be achieved. [Patent Document 1] Patent Publication No. 2023-42694 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide an overhead door having improved wind pressure resistance due to the distinctive shape of the guide rail. [Means for solving the problem]

[0005] The technical means adopted by the present invention are: In an overhead door, a door body made up of multiple sections connected in the height direction opens and closes an opening by guide rollers attached to roller shafts protruding from both ends of each section in the width direction being guided by left and right guide rails to move up and down. The guide rail comprises a first section extending in the height direction of the opening, a curved second section extending rearward from above the first section toward the interior of the room, and a third section extending rearward from behind the second section along the ceiling, When the opening is fully closed, the guide rollers at both ends in the width direction of the door body are positioned in the lower half of the first portion and the second portion, and are thereby restrained by the guide rails, The guide rail includes a main guide portion into which the guide roller is fitted and guided when the door body is raised or lowered, and a sub-guide portion that faces the main guide portion and with which the guide roller can slide; At least in the lower half of the first portion and the second portion, the auxiliary guide portion is provided with a slip-out prevention portion that faces the inner side surface of the guide roller. Overhead door.

[0006] In one aspect, the guide rail includes an outer projected side supported by a building frame, the main guide portion formed on the indoor side of the outer projected side, and the auxiliary guide portion formed from an outdoor projected side formed on the outdoor side of the outer projected side, The main guide portion comprises an indoor side facing edge that is narrower than the outdoor side facing edge, an outer inclined facing edge that connects the outer end of the indoor side facing edge and the outer side facing edge, and an inner inclined facing edge that extends obliquely from the inner end of the indoor side facing edge to the outdoor side, The slip-out prevention portion is formed from an inner projected edge formed at the inner end of the outdoor projected edge, The roller shaft is inserted between the inner projected edge and the inner inclined projected edge, and the guide roller is housed within the guide rail, with the inner side surfaces of the guide roller facing the inner projected edge and the inner inclined projected edge, respectively, across the roller shaft.

[0007] In one embodiment, the main guide portion, the sub-guide portion, and the slip-out prevention portion are integrally formed. [Effects of the Invention]

[0008] In the present invention, by forming a slip-out prevention portion corresponding to at least a specified height portion of the guide rail of the overhead door, when the door body of the overhead door in the fully closed position of the opening is subjected to high wind pressure and the widthwise central portion of each section is deflected, the guide roller is prevented from slipping out of the guide rail, making it possible to demonstrate the designed wind pressure resistance performance. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a side view of the overhead door in a fully closed position. [Figure 2] FIG. 2 is a front view of the overhead door in the fully closed position as seen from the inside of the room. [Figure 3] FIG. 2 is a partially enlarged view of the width direction end portion (hinge mounting portion) of the door body of the overhead door. [Figure 4] FIG. 2 is a partially enlarged plan view showing the opening width direction end of the overhead door in a fully closed position. [Figure 5] 3 is a partially enlarged view of an upper region of an end portion in the width direction of FIG. 2. FIG. [Figure 6] FIG. 2 is a partial enlarged view of the upper portion of FIG. [Figure 7] FIG. 2 is a partially enlarged view of FIG. [Figure 8] FIG. 2 is a side view of the guide rail according to the embodiment. [Figure 9] 1A is a cross-sectional view of a guide rail according to the present embodiment, and FIG. 1B is a cross-sectional view of a portion of the guide rail according to the present embodiment where a notch is formed. [Figure 10] 10 is a conceptual diagram showing the behavior of the guide roller when a strong wind pressure acts on the overhead door according to the present embodiment. FIG. [Figure 11] 10A and 10B are conceptual diagrams illustrating a process of inserting the guide roller assembly according to the embodiment into the guide rail. [Figure 12] 10A to 10C are diagrams showing a process of attaching the guide roller assembly according to the present embodiment to the main body of the section. [Figure 13] 10A to 10C are diagrams showing a process of attaching the guide roller assembly according to the present embodiment to the main body of the section. [Figure 14] 10A to 10C are diagrams showing a process of attaching the guide roller assembly according to the present embodiment to the main body of the section. [Figure 15] 1 is a conceptual diagram showing the behavior of sections and guide rollers when strong wind pressure acts on a conventional overhead door. DETAILED DESCRIPTION OF THE INVENTION

[0010] [A] Overall structure of overhead door Fig. 1 is a side view of an overhead door in a fully closed position, and Fig. 2 is a front view of the overhead door in a fully closed position as seen from inside the room. The door body D of the overhead door is composed of multiple horizontally rectangular sections 1 connected by hinges so that they can rotate in the height direction. Guide rollers 11 are rotatably provided on both ends of the width of each section 1, and the door body D opens and closes the building opening as the left and right guide rollers 11 of each section 1 are guided by the left and right guide rails 2, respectively, to rise and fall. In Fig. 1, the right side is the inside of the room.

[0011] In this specification, section 1 includes a top section, a middle section, and a bottom section, and are collectively referred to as "section 1." However, please note that when the focus is on the top section, it may be referred to as "top section 1'," and when the focus is on the bottom section, it may be referred to as "bottom section 1" to distinguish it from middle section 1.

[0012] As shown in Figures 1 and 8, the guide rail 2 is composed of a first section G1 extending in the height direction of the opening, a curved second section G2 extending rearward from above the first section G1 toward the interior of the room, and a third section G3 extending rearward from behind the second section G2 along the ceiling CL. The first section G1 slopes gently upward toward the interior of the room. The third section G3 slopes gently upward toward the interior of the room.

[0013] When the opening is fully closed, each section 1 is positioned at the first position G1 of the guide rail 2, with the multiple sections 1 assuming a nearly vertical position to close the opening. When the door body D is in the opening-closing position, the guide rollers 11 at both widthwise ends are constrained within the guide rails G, and the lower end of the bottom section 1'' is in contact with the floor surface FL. From the opening-fully closed position, each section 1 is raised from a nearly vertical position to a nearly horizontal position (gentle inclination position) positioned at the third position G3, and the door body assumes a position extending laterally along the ceiling CL of the indoor space, thereby reaching the opening-fully open state.

[0014] The main body 10 of the section 1 is composed of a horizontally rectangular surface extending across substantially the entire width of the building opening, a long upper frame located at the upper end of the surface and extending horizontally across the entire width of the section 1, a long lower frame located at the lower end of the surface and extending horizontally across the entire width of the section 1, left and right vertical frames 3 connecting both widthwise ends of the upper and lower frames in the height direction, inner vertical frames 4 adjacent to the inside of the vertical frames 3, and a plurality of center frames 5 connecting predetermined widthwise intermediate positions of the upper and lower frames in the height direction. In this embodiment, the center frames 5 are arranged more densely toward the center of each section in the width direction than at both widthwise ends.

[0015] In the door body D, the lower end surface of the upper section 1 and the upper end surface of the lower section 1 of the adjacent sections 1 on the top and bottom are shaped to fit together when the opening is in a fully closed position. In this embodiment, the stepped lower end surface and the stepped upper end surface fit together, but for example, a concave lower end surface and a convex upper end surface may fit together.

[0016] A rotating shaft 13 equipped with a balance spring 12 is disposed above the building opening, and one end of a winding wire 15 is fixed to a drum 14 journalled at each end of the rotating shaft 13. The other end of the winding wire 15 is connected to each of the left and right ends of the bottom section 1'', and the biasing force of the balance spring 12 in the winding direction biases the door body, which is in a fully closed position, in the opening direction (upward). An emergency fall prevention device 16 is provided on the bottom section 1'' in case the wire breaks.

[0017] In the door body D, the indoor-side portions of the vertically adjacent sections 1 are connected via hinges 6, 7, and the vertically adjacent sections 1 can rotate around the rotation axes of the hinges 6, 7. More specifically, the hinge 6 is provided so as to straddle the indoor-side facing portions 30, 40 of the vertical stiles 3 and inner vertical stiles 4 of the vertically adjacent sections 1, and the hinge 7 is provided so as to straddle the indoor-side facing surface of the middle stile 5 of the lower section 1 of the vertically adjacent sections 1 and the reinforcing portion 17 protruding across the width from the indoor-side facing surface of the bottom stile of the upper section 1.

[0018] [B] Guide roller mounting structure The guide roller 11 is rotatably attached to the tip of the roller shaft 110, and as shown in Figure 10, roller brackets 8 that support the roller shaft 110 are fixed by fastening members (e.g., screws) to upper portions of both widthwise ends on the indoor side surface of the section 1. The roller bracket 8 has a surface portion 80 that is fixed to the indoor side surface of the section 1, and a support portion 81 that rises and faces the surface portion 80. In this embodiment, two roller brackets 8 are provided adjacent to each other in the widthwise direction at the widthwise ends of the indoor side surface of the section 1, and the roller shaft 110 is supported by the support portions 81 of the two roller brackets 8.

[0019] As shown in Fig. 3, vertically adjacent sections 1 are rotatably connected by hinges 6 provided on the stiles 3 and the interior facing portions 30 and 40 of the inner stiles 4 arranged side by side at both widthwise ends of the sections 1. In this embodiment, the roller brackets of the sections 1 are also served by the hinges 6. As shown in Figs. 3 and 11, the hinges 6 are composed of an upper first plate 60, a lower second plate 61, and a shaft portion 62, with the first plate 60 being connected by screws to the lower portions of the stiles 3, the interior facing portions 30 and 40 of the inner stiles 4 of the upper section 1 of the vertically adjacent section 1, and the second plate 61 being connected by screws to the upper portions of the stiles 3, the interior facing portions 30 and 40 of the inner stiles 4 of the lower section 1 of the vertically adjacent section 1.

[0020] A pair of rising pieces 63 of the second plate 61 of the hinge 6 form support portions for the roller shaft 110. That is, at the widthwise end of the interior portion of each section 1, the roller shaft 110 of the guide roller 11 is supported by four rising pieces 63 arranged side by side in the widthwise direction. The roller shaft 110 is inserted through an insertion hole formed in each rising piece 63. The first plate 60 and the second plate 61 of the hinge 6 according to this embodiment correspond to the surface portion 80 of the roller bracket 8, and the rising pieces 63 correspond to the support portion 81 of the roller bracket 8. As shown in FIGS. 10 and 11 , the base end of the roller shaft 110 is inserted through the innermost support portion 81 (rising piece 63) and extends inward to form an extension portion, and the extension portion is provided with a retaining pin 111 that is longer than the diameter of the insertion hole formed in the support portion 81 (rising piece 63).

[0021] [C] Guide rail configuration The configuration of the guide rail 2 will be described with reference to Figures 4, 8, and 9. As shown in Figure 8, the guide rail 2 is made up of a first portion G1 extending in the height direction of the opening, a curved second portion G2 extending rearward from above the first portion G1 toward the inside of the room, and a third portion G3 extending rearward from behind the second portion G2 along the ceiling CL, and is supported by a frame W.

[0022] As shown in Figure 9 (A), the guide rail 2 has an outer prospective edge 20, a main guide portion formed on the indoor side of the outer prospective edge 20, and a sub-guide portion formed from an outdoor prospective edge 21 formed on the outdoor side of the outer prospective edge 20.

[0023] The first portion G1 of the guide rail 2 is gently inclined from bottom to top toward the interior of the room, and when the door body D moves up and down, the guide rollers 11 are guided while mainly making sliding contact with the main guide portion, and the guide rollers 11 can make sliding contact with the auxiliary guide portion depending on the behavior of the section 1. From the upper half of the second portion G2 to the third portion G3 of the guide rail 2, the auxiliary guide portion is located on the upper side and the main guide portion is located on the lower side, and the guide rollers 11 are guided while making sliding contact with the main guide portion.

[0024] The main guide portion of the guide rail 2 is formed into a trapezoidal cross section and is made up of an indoor-side visible edge 22 that is narrower than the outdoor-side visible edge 21, an outer inclined visible edge 23 that connects the outer end of the indoor-side visible edge 22 to the outdoor-side visible edge 20, and an inner inclined visible edge 24 that extends at an angle from the inner end of the indoor-side visible edge 22 to the outdoor side. A slip-out prevention portion is formed from an inner visible edge 25 formed at the inner end of the outdoor-side visible edge 21. In this embodiment, the outer visible edge 20, main guide portion (indoor-side visible edge 22, outer inclined visible edge 23, inner inclined visible edge 24), auxiliary guide portion (outdoor-side visible edge 21), and slip-out prevention portion (inner visible edge 25) are integrally formed.

[0025] The guide rail 2 is supported by the frame W by having its outer side (outer projected edge 20) fixed to a support member 27 attached to the frame W, and a roller shaft 110 is inserted from the inside (Fig. 4). The roller shaft 110 is inserted through an insertion portion 26 formed between the inner projected edge 25 and the inner inclined projected edge 24 of the guide rail 2, and the guide roller 11 is housed inside the guide rail 2, with the inner side surfaces of the guide roller 11 facing the inner projected edge 25 and the inner inclined projected edge 24, respectively, across the roller shaft 110.

[0026] In the guide rail 2 according to this embodiment, an inner projected edge 25 is formed at a position where all of the guide rollers 11 (including the guide rollers 11 in the upper portion of the top section 1′) of each section 1 are located when the opening is fully closed. That is, the inner projected edge 25 is provided in at least the lower half of the first portion G1 and the second portion G2 of the guide rail 2. When the opening is fully closed, the uppermost guide roller 11 is located in the lower half of the second portion G2, and the other guide rollers 11 are located in the first portion G1. When the door body D of the overhead door in the fully closed position is subjected to high wind pressure, as shown in FIG. 10 , the central portion of each section 1 in the width direction bends, and the guide rollers 11 at both ends of the section 1 in the width direction tilt within the guide rail 2. However, the outdoor portions of the inner side surfaces of the guide rollers 11 abut against the inner projected edge 25 of the guide rail 2, preventing the guide rollers 11 from slipping out and achieving the designed wind resistance. If section 1 bends further from this state, the guide roller 11 continues to be prevented from slipping out, and section 1 slides inward relative to the roller shaft 110, but the anti-slip pin 111 provided on the base end side of the roller shaft 110 abuts against the support part 81 (rising piece 63) located at the innermost position, thereby preventing the roller shaft 110 from slipping out.

[0027] The width dimension of the insertion portion 26 of the guide rail 2 is larger than the diameter of the shaft portion 110 of the guide roller 11 and smaller than the diameter of the guide roller 11. As shown in Fig. 8, a plurality of notches 250 are formed at intervals in the height direction on the inner projected edge 25 of the guide rail 2, and the guide roller 11 can be inserted into the guide rail 2 through the enlarged gap at the portion where the notches 250 are formed.

[0028] 7, the notch 250 is formed in the guide rail 2 at a position other than the height position where the guide roller 11 is located when the opening is fully closed. This prevents the slat 1 from bending and the guide roller 11 from slipping out of the enlarged portion of the insertion portion 26 of the guide rail 2 when the door body D of the overhead door in the fully closed position is subjected to wind pressure.

[0029] [D] Guide roller installation method 11 to 14, when attaching the guide roller 11, a guide roller assembly 11' is prepared, which is made up of the guide roller 11, a roller shaft 110, and a roller bracket (two hinges 6).

[0030] As shown in Figure 12, the body 10 of the bottom section 1'' is placed on the floor surface FL between the left and right guide rails 2, and the body 10 of the middle section 1 is placed so as to overlap the body 10 of the bottom section 1''. A guide roller assembly 11' is prepared, and the guide roller 11 is inserted into the guide rail 2 from the enlarged portion of the insertion portion 26 of the guide rail 2 formed by the notch 250 of the inner projected edge 25.

[0031] As shown in Figure 11, with the guide roller assembly 11' tilted, the guide roller 11 is inserted into the guide rail 2 through the enlarged portion of the insertion portion 26 of the guide rail 2 formed by the notch 250 of the inner prospective edge 25, and the peripheral surface of the guide roller 11 is brought close to the outer prospective edge 21 and the inner prospective edge 22.

[0032] With the guide rollers 11 stored within the guide rails 2, the guide roller assembly 11' is moved downward, and the lower second plate 61 is brought into contact with the upper portions of the facing surfaces 30, 40 of the stiles 3 and inner stiles 4 of the bottom section 1", and the upper first plate 60 is brought into contact with the lower portions of the facing surfaces 30, 40 of the stiles 3 and inner stiles 4 of the middle section 1, and they are fixed in place with screws 64. Furthermore, with the main body 10 of section 1 stacked on the main body 10 of bottom section 1", multiple hinges 7 are attached at the middle portion in the width direction. The same process is repeated, and the sections 1 are connected in a stacked manner to form the door body D. [Explanation of symbols]

[0033] 1 section 10 Main Unit 11 Guide roller 110 Roller shaft 111 Retaining pin 11´ Guide roller assembly 2 guide rails 20 Outside prospective edge 21 Outside entrance 22 Indoor side 23 Outer slope prospect 24 Inner slope prospective edge 25 Inner prospective edge 250 notch 26 Insertion part 6 Hinge 60 1st board 61 Second plate (surface of roller bracket) 63 Raised piece (roller bracket support part) 64 Screws G1 1st part G2 2nd part G3 3rd part

Claims

1. In an overhead door, a door body made up of multiple sections connected in the height direction opens and closes an opening by guide rollers attached to roller shafts protruding from both ends of each section in the width direction being guided by left and right guide rails to move up and down. The guide rail includes a first portion extending in the height direction of the opening, a curved second portion extending rearward from above the first portion toward the interior of the room, and a third portion extending rearward from behind the second portion along the ceiling, When the opening is fully closed, the guide rollers at both ends in the width direction of the door body are positioned in the lower half of the first portion and the second portion, and are thereby restrained by the guide rails, The guide rail includes a main guide portion into which the guide roller is fitted and guided when the door body is raised or lowered, and a sub-guide portion that faces the main guide portion and with which the guide roller can slide; At least in the lower half of the first portion and the second portion, the auxiliary guide portion is provided with a slip-out prevention portion facing an inner side surface of the guide roller. Overhead door.

2. The guide rail includes an outer projected side supported by a building frame, the main guide portion formed on the indoor side of the outer projected side, and the auxiliary guide portion formed from an outdoor projected side formed on the outdoor side of the outer projected side, The main guide portion comprises an indoor side facing edge that is narrower than the outdoor side facing edge, an outer inclined facing edge that connects the outer end of the indoor side facing edge and the outer side facing edge, and an inner inclined facing edge that extends obliquely from the inner end of the indoor side facing edge to the outdoor side, The slip-out prevention portion is formed from an inner projected edge formed at the inner end of the outdoor projected edge, the roller shaft is inserted between the inner projected edge and the inner inclined projected edge, the guide roller is accommodated in the guide rail, and inner side surfaces of the guide roller face the inner projected edge and the inner inclined projected edge, respectively, across the roller shaft; 2. The overhead door of claim 1.

3. The main guide portion, the sub-guide portion, and the slip-out prevention portion are integrally formed.

3. An overhead door according to claim 1 or 2.

Images