Mounting structure for roller bracket of overhead door

Abstract

To improve wind-resistant performance of a door body of an overhead door by improving strength of an attachment portion of a roller bracket.SOLUTION: Right and left roller brackets 17 are respectively fixed to both end portions of an indoor side surface part of a section 1 in a width direction, by using a plurality of bolts S. In each roller bracket 17, at least some of the bolts S are fixed to an indoor side aspect surface of a bottom rail 3 or an upper rail 2 including a hollow part. The hollow part is provided with a rear plate (indoor side surface parts 81, 91 of reinforcement materials 8, 9). The rear plate is located on a rear surface of the indoor side aspect surface and to which at least one of nuts 88, 97 is welded. At least one of the bolts S is fastened to the nuts 88, 97 penetrating the aspect surface and welded to the rear plate.SELECTED DRAWING: Figure 42

Description

[Technical field]

[0001] The present invention relates to an overhead door, and more particularly to a mounting structure for a roller bracket of an overhead door. [Background technology]

[0002] Overhead doors are known as fittings that are installed in building openings that connect the outdoors and the inside 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 in the width direction of each section, and the building opening is opened and closed by the guide rollers being guided by the left and right guide rails and rising and falling. The roller shaft of the guide roller is supported by roller brackets fixed to both ends in the width direction of the interior part of the section (Patent Document 1).

[0003] When the overhead door is in the fully closed position, the guide rollers at both ends of each section in the width direction are located inside the guide rail, and when wind pressure acts on the door body, the guide rollers come into contact with the inner surface of the guide rail as the section deforms, thereby resisting the wind pressure. When a large wind pressure acts on a section, a force acts on the section to tilt the roller axis with the guide rollers in contact with the inner surface of the guide rail, and since this force acts on the fixing parts of the roller bracket and the section on the interior side, if the strength of the fixing parts of the bracket is weak, it can affect the strength of the section. [Patent Document 1] Patent Publication No. 2020-122339 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0004] The present invention aims to improve the wind resistance of an overhead door body by improving the strength of the mounting portion of a roller bracket. [Means for solving the problem]

[0005] The technical means adopted in the present invention are: Left and right roller brackets are fixed to both ends of the interior side surface of the section in the width direction by a plurality of fastening members, In each roller bracket, at least a portion of the multiple fastening members is fixed to the interior facing surface of the lower frame or the upper frame having a hollow portion, The hollow portion is provided with a back plate located on the back side of the interior facing surface and having at least one nut welded thereto, At least one of the fastening members for fixing the roller bracket is a bolt, and the bolt is fastened to the nut welded to the back plate through the front surface. A mounting structure for a roller bracket of an overhead door. In one aspect, the upper and lower portions of the interior facing portion of the vertical frames of the section (two vertical frames in this embodiment) are fixed to the interior facing surface of the upper frame and the interior facing surface of the lower frame, respectively, and at least some of the multiple fastening members are fastened from the interior facing portions of the vertical frames. In one embodiment, the remaining fastening member is a bolt that is fastened to a pop nut. In one embodiment, the bolt includes a fastening member located furthest from a widthwise end of the section.

[0006] In one embodiment, the roller bracket includes a support portion that supports a roller shaft, and a fixing portion that is fixed to the indoor side surface portion of the section. In one embodiment, the roller bracket is shared by a hinge connecting adjacent sections vertically, the hinge comprises a first plate having a first surface portion and left and right first rising pieces, a second plate having a second surface portion and left and right second rising pieces, and a shaft portion rotatably connecting the first plate and the second plate, Either the first raised piece or the second raised piece constitutes the support portion of the roller bracket, The first surface portion and / or the second surface portion constitute the fixed portion of the roller bracket.

[0007] In one embodiment, the backing plate is part of a stiffener integrated into the hollow portion. In one embodiment, a hollow reinforcing portion is protruded on the indoor side portion of the lower frame and / or the upper frame of the section across the width direction of the section, Both ends of the reinforcing portion in the width direction do not reach both ends of the frame in the width direction, The interior side surface portion has both side portions not provided with the reinforcing portion, The roller brackets are attached to the both side portions, The reinforcing material has an interior side surface portion located at least on the inner surface of each of the two side portions, and the nut is welded to the rear surface of the interior side surface portion. In one embodiment, a hole for a pop nut is formed on the interior side surface of the reinforcing material, At least a part of a fastening member that fixes the roller bracket is a bolt that is fastened to the pop nut. Effect of the Invention

[0008] In the present invention, at least a portion of the multiple fastening members (bolts) that attach the roller bracket to the indoor side of the section (the fastening members at the locations where a greater force acts, for example, at least the side farthest from the widthwise end of the section) are fastened to welds welded to the back plate, thereby improving the strength of the fastening portion of the roller bracket compared to when the fastening members are fastened to, for example, pop nuts. By using a reinforcing material instead of the back plate with the weld nut, the strength of the fastening part of the roller bracket can be improved by adopting the weld nut without increasing the number of parts (without preparing a special back plate). [Brief description of the drawings]

[0009] [Figure 1]FIG. 2 is a front view of the overhead door in a fully closed position as viewed from the inside of the vehicle. [Diagram 2] FIG. 2 is a side view of the overhead door in a fully closed position. [Diagram 3] 2 is a partially enlarged plan view showing the opening width direction end of the overhead door in a fully closed position. FIG. [Figure 4] FIG. 2 is a front view of the door body of the overhead door according to the present embodiment, as viewed from the inside of the vehicle. [Diagram 5] 5 is a partial enlarged view of an end portion in the width direction of the top section in FIG. 4. FIG. [Figure 6] 5 is a partial enlarged view of an end portion in the width direction of the intermediate section in FIG. 4. FIG. [Figure 7] FIG. 2 is a side view of the overhead door body. [Figure 8] FIG. 11 is a front view of an overhead door body according to another embodiment, as viewed from the inside of the vehicle. [Figure 9] 13 is a front view of an overhead door body according to still another embodiment, as viewed from the inside of the vehicle. FIG. [Figure 10] 1A and 1B are front views of the intermediate section according to this embodiment, the upper view being a front view seen from the outside of the room, and the lower view being a front view seen from the inside of the room. [Figure 11] This is an enlarged partial view of the lower part of Figure 10. [Figure 12] FIG. 2 is a longitudinal cross-sectional view of the intermediate section according to the embodiment. [Figure 13] FIG. 4 is a partial vertical cross-sectional view of the intermediate section according to the embodiment. [Figure 14] FIG. 4 is a plan view of the intermediate section according to the embodiment. [Figure 15] FIG. 4 is a partially enlarged plan view of the intermediate section according to the embodiment. [Figure 16] FIG. 4 is a partially enlarged plan view of the intermediate section according to the embodiment. [Figure 17] A diagram showing the center frame related to this embodiment. [Figure 18] A side view showing the lower frame of this embodiment. [Figure 19]This is a diagram showing the lower frame of this embodiment, where the upper figure is a plan view and the lower figure is a front view seen from the inside of the room. [Figure 20] The upper figure is a side view showing the attachment attached to the reinforcing portion of the lower frame in this embodiment, and the lower figure is a side view of the attachment in this embodiment. [Figure 21] FIG. 2 is a diagram showing an attachment according to the present embodiment. [Figure 22] FIG. 11 is a longitudinal cross-sectional view of an intermediate section according to another embodiment. [Figure 23] FIG. 13 is a plan view of an intermediate section according to another embodiment. [Figure 24] A partially enlarged longitudinal cross-sectional view of the lower stile of the intermediate section according to another embodiment. [Diagram 25] A diagram showing a reinforcement material incorporated into the bottom stile of the mid-section in this embodiment. [Figure 26] A diagram illustrating a solid type lower frame. [Figure 27] This is a front view of the top section of this embodiment, where the upper figure is a front view seen from the outside of the room and the lower figure is a front view seen from the inside of the room. [Figure 28] FIG. 2 is a vertical cross-sectional view of the top section according to the embodiment. [Figure 29] FIG. 2 is a partially enlarged longitudinal cross-sectional view of the top section according to the embodiment. [Diagram 30] FIG. 2 is a plan view of the top section according to the embodiment. [Diagram 31] A figure showing a first embodiment of a reinforcing material to be incorporated into the upper frame of the top section in this embodiment. [Diagram 32] FIG. 13 is a plan view of a top section according to another embodiment. [Diagram 33] FIG. 11 shows a second embodiment of a reinforcement member incorporated into the upper stile of the top section according to another embodiment. [Diagram 34] This is a partial front view of two adjacent sections (top section and middle section) seen from the inside of the room. [Diagram 35] FIG. 35 is a side view of FIG. 34. [Diagram 36] FIG. 35 is a longitudinal sectional view of FIG. 34. [Figure 37] FIG. 36 is a partially enlarged view of FIG. [Figure 38] FIG. 37 is a partially enlarged view of FIG. 36. [Figure 39] The lower figure is a partially enlarged view of the width direction end portion of the top section in FIG. 34, and the upper figure is a top view of the partially enlarged view. [Diagram 40] 35 is a partially enlarged plan view of an end portion in the width direction of the intermediate section in FIG. 34. FIG. [Diagram 41] 11A and 11B are diagrams illustrating the conditions required for curved portions on the base end side of side edges at both ends in the width direction of a reinforcing portion. [Diagram 42] 4A to 4C are diagrams illustrating a mounting structure of a top roller bracket. [Diagram 43] 4A to 4C are diagrams illustrating a mounting structure of a roller bracket. [Diagram 44] This is a front view of the intermediate section equipped with the locking mechanism as seen from the inside of the vehicle. [Diagram 45] This is a diagram showing the latch and latch hook of the locking mechanism, with the upper figure being a plan view and the lower figure being a front view. [Figure 46] This is a diagram showing the operating part of the locking mechanism, where the left figure is a vertical cross-sectional view, the center figure is a front view seen from the inside of the room, and the right figure is a front view seen from the outside of the room. [Figure 47] This is a front view of the width direction end portion of the intermediate section equipped with a locking mechanism as seen from the inside of the vehicle. [Figure 48] FIG. 13 shows a mid-section stile with locking mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [A] Overall structure of overhead door Fig. 1 is a front view of an overhead door in a fully closed position as seen from inside the room, and Fig. 2 is a side view of the overhead door. The door body D of the overhead door is composed of multiple horizontally rectangular sections 1 rotatably connected in the height direction by hinges 16, 16'. Guide rollers 11 are rotatably provided on both ends of the width of each section 1 (see Fig. 3), and the door body D opens and closes the building opening as the left and right guide rollers 11 of each section 1 rise and fall while being guided by the left and right guide rails G, respectively.

[0011] As shown in Fig. 10, Fig. 12, etc., the section 1 is composed of a horizontally rectangular main body 10 extending over almost the entire width of the building opening, a long upper frame 2 located at the upper end of the main body 10 and extending horizontally over the entire width of the section 1, a long lower frame 3 located at the lower end of the main body 10 and extending horizontally over the entire width of the section 1, left and right vertical frames 4 connecting both ends of the upper frame 2 and the lower frame 3 in the height direction, and a plurality of center frames 5 connecting predetermined intermediate portions of the upper frame 2 and the lower frame 3 in the height direction. In this embodiment, an end center frame or an inner vertical frame 4' is provided adjacent to the inside of the vertical frame 4. The inner vertical frame 4' and the center frame 5 may be partially connected to the main body 10.

[0012] In this specification, section 1 includes a top section, a middle section, and a bottom section. It should be noted that when the top section is focused on, it may be referred to as a "top section 1'", and when the bottom section is focused on, it may be referred to as a "bottom section 1'' and may be distinguished from the middle section 1. A reinforcing part 6 for improving wind pressure resistance is integrally formed on the lower frame 3 of section 1 (top section, middle section, bottom section). The top section 1' differs in shape from the other sections 1 in that the reinforcing part 6 is integrally formed on the lower frame 3 and that the reinforcing part 6' is integrally formed on the upper frame 2. The bottom section 1'' differs from the other sections 1 in that a bottom member B made of rubber or resin is attached to the lower end surface, that it is provided with a connecting part 18 to which the lower end of the wire 15 is connected, and that it is provided with an emergency fall prevention device 19 in case the wire is cut, but its basic shape is the same as that of the middle section 1.

[0013] In the door body D, the indoor side portions of the vertically adjacent sections 1 are connected to each other via hinges 16, 16', and the vertically adjacent sections 1 can rotate around the rotation axis of the hinges 16, 16'. More specifically, the hinge 16 is provided so as to straddle the indoor side facing portion 42 of the vertical frame 4 and the inner vertical frame 4' of the vertically adjacent sections 1 (Figs. 4, 6, 8, 9, 34, 35, etc.), and the hinge 16' is provided so as to straddle the surface portion 50, which is the indoor side facing surface of the middle frame 5 of the lower section 1 of the vertically adjacent sections 1, and the lower horizontal surface 63 on the base end side of the reinforcing portion 6 protruding from the indoor side surface portion 32 of the bottom frame 3 of the upper section 1 (see Figs. 4, 8, 9, 36, 38).

[0014] 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 vertically adjacent sections 1 are shaped to fit together when the opening is in a fully closed position. In this embodiment, the stepped lower end surface and upper end surface fit together (see Figs. 7 and 35 to 38), but for example, a concave lower end surface and a convex upper end surface may fit together.

[0015] As shown in Fig. 2, the guide rail G is composed of a first section G1 extending in the height direction of the opening, a curved second section G2 extending backward from above the first section G1 toward the inside of the room, and a third section G3 extending backward from the rear of the second section G2 along the ceiling CL. The first section G1 is gently inclined from the bottom to the top toward the inside of the room. The third section G3 is gently inclined upward toward the inside of the room.

[0016] When the opening is fully closed, each section 1 is positioned at the first portion G1 of the guide rail G, so that the multiple sections 1 assume a nearly vertical position and close the opening. From the fully closed state, each section 1 is raised from a nearly vertical position to a nearly horizontal position (gently inclined position) positioned at the third portion G3 (the lowest bottom section 1'' is positioned at the second portion G2), and the door body assumes a position extending laterally along the ceiling CL of the indoor space, thereby fully opening the opening.

[0017] A rotating shaft 13 equipped with a balance spring 12 is arranged above the building opening, and one end of a winding wire 15 is fixed to a drum 14 supported on both ends of the rotating shaft 13. The other end of the winding wire 15 is connected to both left and right ends of the bottom section 1'', so that the winding force of the balance spring 12 urges the door body, which is in a fully closed position, in the opening direction (upward).

[0018] In this specification, the terms "outdoor side" and "indoor side" are not only used to mean that an element actually faces or is located in the outdoor or indoor side, but are also used to define the relative positional relationship of multiple members. In addition, the terms "upper" and "lower" define the elements of a section based on the section being in a vertical position. The section configuration described below is merely an example and does not limit the contents of the present invention.

[0019] [B] Overview of overhead door sections The details of the configuration of the section 1 constituting the door body D of the overhead door will be described mainly based on the middle section 1. The figures related to the middle section 1 according to this embodiment are mainly shown in Figs. 10 to 25, but it should be noted that there are several different modes. Although the reinforcing part 6 is protruded from the inside of the bottom frame 3, there are modes in which the attachment 7 is attached to the tip part of the reinforcing part 6 on the inside of the room (Figs. 20 and 21) and modes in which the attachment 7 is not attached (Figs. 12 and 13). Furthermore, there are modes in which the middle frames 5 of the bottom frame 3 are arranged at equal intervals in the width direction (Fig. 4), and modes in which the middle frames 5 are densely arranged in the center part in the width direction (Figs. 1, 8, and 9). It should be noted that these modes are not only applicable to the bottom frame 3 of the middle section 1, but can also be applied to the bottom frame 3 of the top section 1' and the bottom frame 3 of the bottom section 1''.

[0020] The main body 10 of the section 1 will now be described. As shown in Figures 10 and 12, the main body 10 of the section 1 is a long plate extending over almost the entire width of the section 1, and an upper frame 2, a lower frame 3, and left and right vertical frames 4 are provided on all four sides of the main body 10, and an inner vertical frame 4' and a center frame 5 are provided on the indoor side of the main body 10 to bridge the upper frame 2 and the lower frame 3.

[0021] In this embodiment, the main body 10 is a plate body bent into a wavy (uneven) shape in a side view or a cross-sectional view. The main body 10 of the section 1 according to this embodiment is made of steel, and is constructed by bending a steel plate into a predetermined shape. As shown in Figs. 11 and 12, the main body 10 of the section 1 is composed of an upper vertical surface portion 100, a central vertical surface portion 101, and a lower vertical surface portion 102, which are positioned at intervals in the height direction in the outdoor portion, and two trapezoidal convex portions 103, one above the other, which are positioned between the upper vertical surface portion 100 and the central vertical surface portion 101 and between the central vertical surface portion 101 and the lower vertical surface portion 102 and protrude toward the indoor side, and the vertical surfaces of the convex portions 103 on the indoor side are the upper intermediate surface portion 104 and the lower intermediate surface portion 104 of the main body 10. The main body 10 includes an upper vertical surface portion 100, a central vertical surface portion 101, and a lower vertical surface portion 102 located on the outdoor side, and an upper intermediate surface portion 104 and a lower intermediate surface portion 104 located on the indoor side. The shape of the main body 10 shown in the figure is an example, and the configuration of the main body 10 of section 1 is not limited to the shape shown in the figure.

[0022] In the section 1 according to this embodiment, the upper frame 2, lower frame 3, left and right vertical frames 4, inner vertical frame 4', and center frame 5 are formed from aluminum moldings. The upper frame 2 and lower frame 3 according to this embodiment are of a hollow type formed in a hollow shape, but they may also be of a solid type without a hollow portion (see FIG. 26).

[0023] [C] Top frame of overhead door section We will now explain the upper frame 2 of section 1. The configuration of the upper frame 2 of the middle section 1 and the configuration of the upper frame 2 of the top section 1' are substantially the same except that the latter has a reinforcing portion 6', so here we will explain the upper frame 2 of section 1 with reference to the upper frame 2 of the top section 1.

[0024] As shown in Figures 12 and 29, the upper frame 2 of the middle section 1 has an upper surface 20, an exterior side surface 21 which is the exterior facing surface, a vertical indoor side surface 22 which is the interior facing surface, and a horizontal lower surface 23, and the upper surface 20 of the upper frame 2 forms the upper surface of the section 1. A hollow portion surrounded by the upper surface 20, the exterior side surface 21, the indoor side surface 22, and the lower surface 23 extends over the entire width of the long upper frame 2. The upper surface 20 is formed in a stepped shape from an exterior horizontal surface 200, an indoor horizontal surface 201 which extends horizontally at a position higher than the horizontal surface 200, and an intermediate vertical surface 202 which connects the exterior horizontal surface 200 and the interior horizontal surface 201. The exterior side surface portion 21 consists of a lower vertical surface 210 and a concave surface 211 that is integrally formed above the vertical surface 210 and has a V-shaped cross section.

[0025] The tip of the outdoor side horizontal surface 200 of the top surface 20 protrudes slightly outside the room beyond the vertical surface 210 of the outdoor side portion 21, and a hanging piece 24 is formed at the tip of the outdoor side horizontal surface 200 of the top surface 20. The first surface on the outdoor side of the upper vertical surface portion 100 of the main body 10 abuts against the inner surface of the hanging piece 24, and the second surface on the indoor side of the upper vertical surface portion 100 abuts against the outer surface of the vertical surface 210, and is fixed to the upper frame 2 with a fastening member (e.g., a rivet).

[0026] [D] Bottom frame of overhead door section The lower frame 3 of the section 1 will be described. As shown in Fig. 12 and Fig. 24, the lower frame 3 of the intermediate section 1 has a horizontal upper surface portion 30, an exterior side surface portion 31 which is the exterior facing surface, a vertical indoor side surface portion 32 which is the interior facing surface, and a lower surface portion 33, and the lower surface portion 33 of the lower frame 3 is the lower surface of the section 1. A hollow portion surrounded by the upper surface portion 30, the exterior side surface portion 31, the interior side surface portion 32, and the lower surface portion 33 extends over the entire width of the long lower frame 3. The lower surface 33 is formed in a stepped shape by an exterior horizontal surface 330, an interior horizontal surface 331 which extends horizontally at a height higher than the horizontal surface 330, and an intermediate vertical surface 332 which connects the exterior horizontal surface 330 and the interior horizontal surface 331. The exterior side surface portion 31 is composed of an upper vertical surface 310 and a concave surface 311 that is integrally formed below the vertical surface 310 and has a V-shaped cross section.

[0027] The tip of the outdoor horizontal surface 330 of the lower surface 33 protrudes slightly outside the room beyond the vertical surface 310 of the outdoor side portion 31, and a rising piece 34 that rises vertically is formed at the tip of the outdoor horizontal surface 330 of the lower surface 33. The main body 10 is fixed to the lower frame 3 with a fastening member (e.g., a rivet) with a first surface on the outdoor side of the lower vertical surface portion 102 abutting against the inner surface of the rising piece 34 and a second surface on the indoor side of the lower vertical surface portion 102 abutting against the outer surface of the vertical surface 310.

[0028] The indoor side portion 32 of the lower frame 3 extends upward and is integrally formed with a vertical piece 35 that rises vertically from the indoor end of the top surface 30, and a horizontal piece 36 that extends to the outdoor side is integrally formed with the upper end of the vertical piece 35. The vertical piece 35 and the horizontal piece 36 form a rising piece that is L-shaped when viewed from the side. The vertical piece 35 and the indoor side portion 32 form a flush vertical surface. The horizontal piece 36 protrudes to the outdoor side and does not protrude from the vertical plane that passes through the indoor side portion 32. As will be described later, the lower portion of the middle frame 5 is fixed to the vertical piece 35 of the rising piece with a fastening member (e.g., a rivet).

[0029] [E] Reinforcement protrusion on bottom frame of overhead door section The reinforcing portion 6 formed integrally with the lower frame 3 will now be described. A hollow reinforcing portion 6 extending across the width of the lower frame 3 is protruded from the indoor side portion 32 of the lower frame 3. In this embodiment, the base end of the reinforcing portion 6 protrudes from approximately the center in the height direction of the indoor side portion 32 of the lower frame 3. The reinforcing portion 6 has a portion whose height dimension gradually increases in the direction away from the indoor side portion 32.

[0030] As shown in FIG. 18, the upper surface of the reinforcing part 6 is composed of an upper horizontal surface 60 extending horizontally from the indoor side surface part 32, an upper inclined surface 61 extending obliquely upward from the tip of the upper horizontal surface 60 in a direction away from the indoor side surface part 32, and a tip upper side surface 62 extending horizontally from the tip of the upper inclined surface 61. The lower surface of the reinforcing part 6 is composed of a lower horizontal surface 63 extending horizontally from the indoor side surface part 32, a lower inclined surface 64 extending obliquely downward from the tip of the lower horizontal surface 63 in a direction away from the indoor side surface part 32, and a tip lower side surface 65 extending horizontally from the tip of the lower inclined surface 64. The tip of the tip upper side surface 62 and the tip of the tip lower side surface 65 are connected by a tip vertical surface 66. The plate thickness of the tip vertical surface 66 is thicker than the plate thickness of other parts.

[0031] The tip of the upper inclined surface 61 (the base end of the tip upper side surface 62) and the tip of the lower inclined surface 64 (the base end of the tip lower side surface 65) are connected by a vertical side 67. The base end of the upper inclined surface 61 (the tip of the upper horizontal surface 60) and the base end of the lower inclined surface 64 (the tip of the lower horizontal surface 63) are connected by a vertical side 68. The intermediate portions of the upper horizontal surface 60 and the lower horizontal surface 63 are connected by two vertical sides 69a and 69b.

[0032] The reinforcing portion 6 comprises a first portion 6A on the base end side having a constant height dimension, and a second portion 6B located on the tip side of the first portion 6A, having an upper inclined surface 61 and a lower inclined surface 64, and whose height dimension gradually increases in the direction away from the first portion 6A (towards the inside of the room).

[0033] The first portion 6A consists of an upper horizontal surface 60 extending horizontally from the indoor side portion 32 toward the inside of the room, a lower horizontal surface 63 extending horizontally from the indoor side portion 32 toward the inside of the room, and a number of hollow portions 603, 604, 605 formed between the upper horizontal surface 60 and the lower horizontal surface 63 by being partitioned by portions of the indoor side portion 32, vertical edges 69a, 69b and vertical edge 68.

[0034] The second portion 6B includes an upper inclined surface 61 extending obliquely upward toward the interior side of the room, a lower inclined surface 64 extending obliquely downward toward the interior side of the room, a tip upper side surface 62 extending horizontally from the tip of the upper inclined surface 61 toward the interior side of the room, a tip lower side surface 65 extending horizontally from the tip of the lower inclined surface 64 toward the interior side of the room, a vertical side 67 connecting the tip of the upper inclined surface 61 and the tip of the lower inclined surface 64, a tip vertical surface 66 connecting the tip of the tip upper side surface 62 and the tip lower side surface 65, a first hollow portion 606 formed by the upper inclined surface 61, the lower inclined surface 64, the vertical side 67, and the vertical side 68 and having a generally triangular or trapezoidal shape in a side view, and a second hollow portion 607 formed by the tip upper side surface 62, the tip lower side surface 65, the vertical side 67, and the tip vertical surface 66 and having a vertical rectangular shape in a side view.

[0035] As shown in FIG. 19, in this embodiment, the height dimension of the tip portion of the reinforcing portion 6, i.e., the height dimension of the tip vertical surface 66, is greater than the height dimension of the bottom frame 3. The height position of the upper end of the tip portion of the reinforcing portion 6, i.e., the height position of the tip upper side surface 62, is located above the upper surface portion 30 of the bottom frame 3. The height position of the lower end of the tip portion of the reinforcing portion 6, i.e., the height position of the tip lower side surface 65, is located below the lower surface portion 33 (the horizontal surface 331 on the indoor side) of the bottom frame 3. The upper end of the rising piece (vertical piece 35 + horizontal piece 36) protruding upward from the upper end of the indoor side surface portion 32 of the bottom frame 3 is located above the tip upper side surface 62, and in the illustrated embodiment, the height position of the approximately central portion of the height dimension of the rising piece (vertical piece 35 + horizontal piece 36) and the tip upper side surface 62 are the same.

[0036] As shown in Figures 14, 19, 23, etc., both widthwise ends of the reinforcing portion 6 according to this embodiment do not reach both end portions of the bottom frame 3. In other words, the interior side surface portion 32 of the bottom frame 3 has both side portions 320 that do not have the reinforcing portion 6. The reinforcing portion 6 according to this embodiment is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the interior side surface portion 32 of the bottom frame 3, and the side edges 600 at both widthwise ends of the reinforcing portion 6 and portions 320' of both side portions 320 extending horizontally from the base ends of the side edges 600 are cutout portions. The cutout portions 320' are cut out and formed so as to be flush with the interior side surface portion 32.

[0037] The side edge 600 of the reinforcing part 6 is composed of a first part 601 extending linearly in a plan view, and a second part 602 located on the base end side of the first part 601 and curved in a plan view. That is, in the cutout part, the corners between the base end side part of the side edge 600 of the reinforcing part 6 and the parts 320' of both side parts 320 of the indoor side surface part 32 are curved in a plan view. In this embodiment, covers C are attached to both end parts in the width direction of the reinforcing part 6 so as to cover the first parts 601 of the side edge 600 of the reinforcing part 6.

[0038] In this embodiment, the first portion 601 of the side edge 600 is made up of the tip portion of the side edge of the upper horizontal surface 60, the side edge of the upper inclined surface 61, the side edge of the tip upper side surface 62, the tip portion of the side edge of the lower horizontal surface 63, the side edge of the lower inclined surface 64, the side edge of the tip lower side surface 65, the side edge of the tip vertical surface 66, the side edge of the vertical side 67, the side edge of the vertical side 68, and the side edges of the vertical sides 69a and 69b. The second portion 602 of the side edge 600 is made up of the base portion of the side edge of the upper horizontal surface 60 and the base portion of the side edge of the lower horizontal surface 63.

[0039] [F] Overhead door section stile The vertical frame 4 of the section 1 will be described. As shown in Figs. 11, 15, 34, 48, etc., the vertical frame 4 is a long member extending vertically in the height direction, and has a U-shaped cross section consisting of a projection surface portion 40, an exterior projection portion 41, and an interior projection portion 42. The projection surface portion 40 of the vertical frame 4 forms both end faces in the width direction of the section 1. The upper end portion of the exterior projection portion 41 is fixed to the exterior side surface portion 21 (vertical surface 210) of the upper frame 2, and the lower end portion is fixed to the exterior side surface portion 31 (vertical surface 310) of the lower frame 3. The upper end portion of the interior projection portion 42 is fixed to the interior side surface portion 22 of the upper frame 2, and the lower end portion is fixed to the interior side surface portion 32 of the lower frame 3. In vertically adjacent sections 1, the lower portion of the interior facing portion 42 of the vertical frame 4 of the upper section 1 and the upper portion of the interior facing portion 42 of the vertical frame 4 of the lower section 1 are connected by a hinge 16.

[0040] The inner vertical frame 4' of section 1 will be described. As shown in Fig. 11, Fig. 15, Fig. 34, etc., the inner vertical frame 4' is a long member extending perpendicularly in the height direction, and has a hat-shaped cross section made up of a surface portion 40' which is the interior facing surface, a first side surface portion 41' which is the facing surface, a second side surface portion 42', a first facing edge 43', and a second facing edge 44'. The first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44' are shorter than the overall height of the inner vertical frame 4', the upper ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44' are located lower than the upper end of the surface portion 40', and the lower ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44' are located higher than the lower end of the surface portion 40', and the surface portion 40' has an upper portion located higher than the upper ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44', and a lower portion located lower than the lower ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44'.

[0041] The upper portion of the surface portion 40' of the inner vertical frame 4' is fixed to the indoor side surface portion 22 of the upper frame 2, and the lower portion of the surface portion 40' is fixed to the indoor side surface portion 32 of the lower frame 3. The upper ends of the first side surface portion 41', the second side surface portion 42', the first visible edge 43', and the second visible edge 44' are adjacent to or in contact with the lower surface portion 23 of the upper frame 2, and the lower ends of the first side surface portion 41', the second side surface portion 42', the first visible edge 43', and the second visible edge 44' are adjacent to or in contact with the horizontal piece 36 at the upper end of the vertical piece 35 that rises vertically from the upper surface portion 30 of the lower frame 3. In the vertically adjacent sections 1, the lower portion of the surface portion 40' of the inner vertical frame 4' of the upper section 1 and the upper portion of the surface portion 40' of the inner vertical frame 4' of the lower section 1 are connected by a hinge 16.

[0042] The vertically adjacent sections 1 are rotatably connected by hinges 16 provided on the vertical frame 4, the indoor facing portion 42 of the inner vertical frame 4', and the indoor surface portion 40' of the section 1, which are arranged side by side at both ends in the width direction of the section 1. The hinge 16 is composed of an upper first plate 160, a lower second plate 161, and an axis portion 162. The first plate 160 of the hinge 16 is fixed to the vertical frame 4, the indoor facing portion 42 of the inner vertical frame 4', and the lower end portion of the indoor surface portion 40' of the section 1 located on the upper side. The first plate 160 is composed of a surface portion 163 and rising pieces 164 on both the left and right ends of the surface portion 163. The second plate 161 of the hinge 16 is fixed to the vertical frame 4, the indoor facing portion 42 of the inner vertical frame 4', and the upper end portion of the indoor surface portion 40' of the section 1 located on the lower side. The second plate 161 is composed of a surface portion 165 and rising pieces 166 on both the left and right ends of the surface portion 165. A lower portion of the rising piece 164 of the first plate 160 and an upper portion of the rising piece 166 of the second plate 161 overlap with each other, and a shaft portion 162 of the hinge 16 is provided at this overlapping portion.

[0043] In this embodiment, the rise dimension of the left and right rising pieces 166 of the second plate 161 of the hinge 16 is larger than the left and right rising dimension 164 of the first plate 160, and the rising pieces 166 form a roller bracket that supports the roller shaft 110 of the guide roller 11. That is, at the width direction end of the indoor side portion of each section 1, the roller shaft 110 of the guide roller 11 is supported by four rising pieces 166 arranged side by side in the width direction. The mounting structure of the roller bracket according to this embodiment will be described later.

[0044] [G] Overhead door section center frame The center frame 5 of section 1 will now be described. The center frame 5 is fixed in section 1 so as to span between the upper frame 2 and the lower frame 3, and multiple center frames 5 are provided at intervals in the width direction of section 1. The center frames 5 serve to reinforce section 1 and to serve as mounting points for hinges 16'. Please note that, as will be described later, some of the multiple center frames 5 may include center frames (5B) to which hinges 16' are not attached.

[0045] As shown in Figs. 11, 17, 22, 34, etc., the middle frame 5 is a long member extending vertically in the height direction, and has a hat-shaped cross section with a surface portion 50 which is the interior facing surface, a first side surface portion 51 which is the facing surface, a second side surface portion 52, a first facing edge 53, and a second facing edge 54, and has a cross section shape that is approximately the same as that of the inner vertical frame 4'. In addition, the first side surface portion 51 and the second side surface portion 52 extend from both ends of the width direction of the surface portion 50, and protrusions 512 and 522 which extend over the entire height of the middle frame 5 are formed at both ends of the width direction of the surface portion 50. While the vertical frame 4 and the inner vertical frame 4' have a height dimension that covers the entire height of the section 1, the height dimension of the middle frame 5 is slightly shorter than the height dimensions of the vertical frame 4 and the inner vertical frame 4'. As shown in Figures 11 and 22, the upper end of the center frame 5 is located at the upper end of section 1 (upper surface portion 20 of upper frame 2), while the lower end of the center frame 5 is located above the reinforcement portion 6 of the lower frame 3 of section 1 and does not reach the lower end of section 1.

[0046] The first side portion 51, the second side portion 52, the first visible edge 53, and the second visible edge 54 of the center frame 5 are shorter than the overall height of the center frame 5, and the upper end 510 of the first side portion 51 (see Figure 22), the upper end of the second side portion 52 (not shown, at the same height as the upper end 510), the upper end 530 of the first visible edge 53, and the upper end 540 of the second visible edge 54 are located lower than the upper end of the surface portion 50, and the lower end 511 of the first side portion 51 (see Figure 22), the lower end of the second side portion 52 (not shown, at the same height as the lower end 511), the lower end 531 of the first visible edge 53, and the lower end 541 of the second visible edge 54 are located higher than the lower end of the surface portion 50.

[0047] The surface portion 50 has an upper portion 500 located above the upper end 510 of the first side portion 51 (see FIG. 22), the upper end of the second side portion 52, the upper end 530 of the first visible edge 53, and the upper end 540 of the second visible edge 54, and a lower portion 501 located below the lower end 511 of the first side portion 51, the lower end of the second side portion 52 (not shown, at the same height as the lower end 511), the lower end 531 of the first visible edge 53, and the lower end 541 of the second visible edge 54. As shown in FIG. 17, a hole portion 502 is formed in the upper portion of the surface portion 50 for attaching the second plate 161' of the hinge 16' with a fastening member (e.g., a screw and a pop nut), and a hole 503 is formed in the lower portion of the surface portion 50 for fixing the lower end portion of the center frame 5 to the vertical piece 35 of the rising piece of the lower frame 3 with a fastening member (e.g., a blind rivet). In this specification, the term "screw" includes "bolt."

[0048] As shown in Fig. 22, the upper portion 500 of the face portion 50 of the center frame 5 abuts against the indoor side surface portion 22 of the upper frame 2, and the upper portion 500 is fixed to the indoor side surface portion 22 of the upper frame 2 with a fastening member (e.g., a screw and a pop nut), and the lower portion 501 of the face portion 50 abuts against the vertical piece 35 of the rising piece of the lower frame 3 and the upper half portion of the indoor side surface portion 32, and the lower portion 501 is fixed to the vertical piece 35 of the rising piece of the lower frame 3 with a fastening member (e.g., a blind rivet). In this embodiment, protrusions (so-called flanges) 512, 522 are integrally formed at the width direction ends of the upper portion 500 and the lower portion 501 of the face portion 50 of the center frame 5, so that the strength of the upper portion 500 and the lower portion 501 formed only from the face portion is improved.

[0049] The vertically adjacent sections 1 are rotatably connected by a hinge 16' provided on the indoor surface 50 of a plurality of center frames 5 provided at the widthwise intermediate portion of the section 1 and the lower horizontal surface 63 of the base end side of the reinforcement portion 6 protruding from the bottom frame 3 of the section 1. The hinge 16' is composed of an upper first plate 160', a lower second plate 161', and a shaft portion 162'. As shown in FIG. 38, the first plate 160' of the hinge 16' is fixed to the lower horizontal surface 63 of the base end side of the reinforcement portion 6 protruding from the indoor side surface portion 32 of the bottom frame 3 of the section 1 located on the upper side, and the second plate 161' of the hinge 16' is fixed to the upper end portion of the indoor surface portion 50 of the center frame 5 of the section 1 located on the lower side.

[0050] [H] Configuration of the center frame of the overhead door section In the embodiment shown in Fig. 4, four center frames 5 are provided at approximately equal intervals in the width direction of each section 1. In contrast to this, in the embodiments shown in Figs. 1, 8, and 9, in an overhead door door body D formed by connecting a plurality of sections 1 in the height direction, each section 1 includes a main body 10, left and right vertical frames 4, an upper frame 2, a lower frame 3, and a plurality of center frames 5 provided to bridge the upper frames 2 and the lower frames 3, and the center frames 5 are arranged more densely in the center of each section 1 in the width direction than at both ends in the width direction.

[0051] More specifically, the multiple middle frames 5 are arranged at equal intervals in the width direction of section 1 and consist of multiple first middle frames 5A equipped with hinges 16 for connecting adjacent sections 1 above and below, and multiple second middle frames 5B arranged between the multiple first middle frames 5A located in the central portion of the width direction and not equipped with hinges.

[0052] In the embodiment shown in Fig. 1, seven first stiles 5A and two second stiles 5B are arranged in each section 1 constituting the door body D, and in the embodiment shown in Fig. 8, five first stiles 5A and two second stiles 5B are arranged in each section 1 constituting the door body D. In the embodiment shown in Fig. 9, four first stiles 5A and three second stiles 5B are arranged.

[0053] When the number of first stiles 5A is an odd number, one first stile 5A is arranged in the center of the width of section 1, and second stiles 5B are arranged on both sides of it. When the number of first stiles 5A is an even number, one second stile 5B is arranged in the center of the width of section 1, and two central first stiles 5A are arranged on both sides of it, and second stiles 5B are arranged adjacent to each central first stile 5A with a gap between them.

[0054] [I] A reinforcement built into the bottom frame of an overhead door section. 23 to 25, the reinforcing material 8 incorporated in the bottom frame 3 of section 1 will be described. As described above, the indoor side portion 32 of the bottom frame 3 according to this embodiment has both side portions 320 that do not have reinforcing portions. A long reinforcing material 8 is incorporated in the bottom frame 3 so as to follow at least the inner surface of both side portions 320. The reinforcing material 8 according to this embodiment has a cross-sectional shape that follows the inner surface shape of the bottom frame 3, and is incorporated by inserting it into the hollow portion from an opening at the widthwise end of the bottom frame 3. In this embodiment, left and right reinforcing materials 8 are incorporated in the hollow portion of the bottom frame 3 at the left and right widthwise ends of the bottom frame 3 so as to follow the inner surfaces of the left and right side portions 320.

[0055] As shown in Fig. 25, the reinforcing member 8 according to this embodiment is a long member having a predetermined length, and is made up of an upper surface portion 80, an indoor side surface portion 81, a lower surface portion 82, an upper hanging piece 83 on the outdoor side of the upper surface portion 80, a lower hanging piece 84 on the outdoor side of the lower surface portion 82, and a lower horizontal piece 85 extending horizontally from the lower end of the lower hanging piece 84 to the outdoor side, and is provided with a first end 86 and a second end 87. An opening extending in the length direction is formed between the upper hanging piece 83 and the lower horizontal piece 85, and the portion of the reinforcing member 8 corresponding to the indoor side surface portion 81 (the portion facing the indoor side) is open. The reinforcing member 8 according to this embodiment is made of steel, and is obtained by bending a steel plate.

[0056] A plurality of rivet holes 800 are formed at intervals in the longitudinal direction in the top surface portion 80 of the reinforcing material 8. Three pop nut holes 810 are formed in the interior side surface portion 81 of the reinforcing material 8 near the first end 86, and a bolt insertion hole 811 is formed on the side away from the first end 86 with respect to the hole 810 furthest from the first end 86, and a nut 88 is fixed by welding to the rear surface of the interior side surface portion 81 at a position behind the insertion hole 811.

[0057] As shown in FIG. 24 , in a state where the reinforcing material 8 is incorporated into the hollow portion of the bottom frame 3, an upper surface portion 80 of the reinforcing material 8 abuts against the inner surface of the upper surface portion 30 of the bottom frame 3 and is fixed thereto with a fastening member (e.g., a blind rivet), an indoor side surface portion 81 of the reinforcing material 8 abuts against the inner surface of the indoor side surface portion 32 of the bottom frame 3 and is fixed thereto with a fastening member (e.g., a screw), and a lower surface portion 82 of the reinforcing material 8 abuts against the inner surface of the indoor side surface portion 32 of the bottom frame 3 and is fixed thereto with a fastening member (e.g., a screw). 3, the upper hanging piece 83 of the reinforcing material 8 is close to (or may abut) the vertical surface 310 of the exterior side portion 31 of the bottom frame 3, the lower hanging piece 84 of the reinforcing material 8 is close to (or may abut) the vertical surface 332 of the lower surface portion 33 of the bottom frame 3, and the lower horizontal piece 85 of the reinforcing material 8 is close to (or may abut) the horizontal surface 330 of the lower surface portion 33 of the bottom frame 3.

[0058] A first end 86 of the reinforcement 8 coincides with or is close to the widthwise edge of the bottom frame 3, and a second end 87 of the reinforcement 8 is located at least closer to the widthwise central portion of the bottom frame 3 than the widthwise side edge 600 of the reinforcing portion 6. For example, as a non-limiting example, the length dimension of the reinforcement 8 is 1.5 times or more, for example, about twice the width dimension of each of the side portions 320. In the present invention, it is not excluded to incorporate a reinforcement material across the entire width of the bottom frame 3 into the hollow portion of the bottom frame 3, but from the viewpoint of reducing the weight of the section 1, it is advantageous to incorporate reinforcement materials 8 that are shorter than the entire width into both left and right end portions of the bottom frame 3.

[0059] In this embodiment, a hollow type bottom frame 3 is shown, but the bottom frame 3 may also be a solid type. A solid type bottom frame 3' is shown in Figure 26. As shown in Figure 26, a reinforcing portion 6 is protruded from the interior side portion 32' of the bottom frame 3', and both widthwise ends of the reinforcing portion 6 do not reach both ends of the bottom frame 3'. Reinforcing material 8' is provided at both widthwise ends of the inner surface of the bottom frame 3' so as to run along the inner surface (the inner surfaces of the upper surface portion 30', the interior side portion 32' and the lower surface portion 33').

[0060] [J] An attachment attached to the tip of the reinforcement part protruding from the bottom frame of an overhead door section. As shown in Figures 20, 21, 22, 36, and 38, an attachment 7 can be attached to the tip portion of the reinforcing portion 6 of the lower frame 3 of section 1 in this embodiment, and by attaching the attachment 7 to the tip portion of the reinforcing portion 6, the tip side of the reinforcing portion 6 can be extended away from the indoor side portion 32.

[0061] As shown in Figures 20 and 21, the attachment 7 according to this embodiment is an elongated member having a generally U-shaped cross section made up of a front surface portion 70, an upper surface portion 71, and a lower surface portion 72, the upper surface portion 71 being made up of an extension portion 710 on the side closer to the front surface portion 70 and a fixed portion 711 on the side farther from the front surface portion 70, and the lower surface portion 72 being made up of an extension portion 720 on the side closer to the front surface portion 70 and a fixed portion 721 on the side farther from the front surface portion 70. A positioning piece 73 that abuts on the tip portion of the reinforcing portion 6 is protruded from the lower surface of the upper surface portion 71 of the attachment 7 at the boundary between the extension portion 710 and the fixed portion 711, and a positioning piece 74 that abuts on the tip portion of the reinforcing portion 6 is protruded from the upper surface of the lower surface portion 72 at the boundary between the extension portion 720 and the fixed portion 721.

[0062] The attachment 7 can be fixed, for example, by a fastening member (e.g., a rivet), with the fixing portion 711 of the upper surface portion 71 abutting the upper surface (horizontal tip upper surface 62) of the tip portion of the reinforcement portion 6, and the fixing portion 721 of the lower surface portion 72 abutting the lower surface (horizontal tip lower surface 65) of the tip portion of the reinforcement portion 6.

[0063] With the attachment 7 attached to the tip portion of the reinforcing part 6, the extension 710 of the upper surface part 71, the extension 720 of the lower surface part 72, and the front surface part 70 are located on the indoor side of the tip vertical surface 66 of the reinforcing part 6, and by attaching the attachment 7 to the tip portion of the reinforcing part 6, the tip side of the reinforcing part 6 is extended so as to be separated from the indoor side surface part 32. For example, by preparing multiple types of attachments 7 consisting of extensions 710, 720 with different dimensions, it is possible to select a different attachment 7 according to the strength required at the site.

[0064] In the attachment 7, when the attachment 7 is attached to the reinforcing portion 6, the plate thickness of the front portion 70, which is located at the position furthest from the indoor side portion 32, is greater than the plate thicknesses of the upper portion 71 and the lower portion 72. In the upper portion 71, the plate thickness of the extension portion 710 is greater than the plate thickness of the fixing portion 711, and in the lower portion 72, the plate thickness of the extension portion 720 is greater than the plate thickness of the fixing portion 721.

[0065] In this embodiment, positioning pieces 73, 74 are provided on the upper surface 71 and the lower surface 72 of the attachment 7, so that the tip portion of the reinforcement portion 6 is received in the opening of the attachment 7, which is U-shaped in cross section, by sandwiching the upper and lower surfaces of the tip portion of the reinforcement portion 6 between the upper surface 71 and the lower surface 72 and placing the attachment 7 thereon.The upper positioning piece 73 abuts against the upper portion of the tip portion of the reinforcement portion 6 (the corner formed by the tip upper surface 62 and the tip vertical surface 66) and the lower positioning piece 74 abuts against the lower portion of the tip portion of the reinforcement portion 6 (the corner formed by the tip lower surface 65 and the tip vertical surface 66).This allows the attachment 7 to be positioned in a state where the upper positioning piece 73 abuts against the upper portion of the tip portion of the reinforcement portion 6 (the corner formed by the tip lower surface 65 and the tip vertical surface 66).This improves the ease of installation of the long attachment 7 relative to the reinforcement portion 6 extending in the width direction of the lower frame 3 of section 1.

[0066] The attachment 7 according to this embodiment shows one embodiment, and the specific shape and configuration of the attachment 7 are not limited to the embodiment shown in the drawing. For example, the foot of the attachment having a hat-shape in cross section may be fixed to the vertical surface (tip vertical surface 66) of the tip portion of the reinforcing part 6 with a fastening member (e.g., a screw) to extend the tip side of the reinforcing part 6 away from the indoor side surface part 32.

[0067] [K] Top section of overhead door The detailed configuration of section 1 has been described mainly based on intermediate section 1, but the basic configuration of top section 1' and bottom section 1'' is the same as that of intermediate section 1, and the description of intermediate section 1 can be used.

[0068] 27 and 28 show a front view and a vertical cross section of the top section 1', but the configurations of the main body 10, upper frame 2 (excluding reinforcing portion 6'), lower frame 3, vertical frame 4, inner vertical frame 4', center frame 5 (excluding the configuration of the upper end portion), and reinforcing portion 6 of the top section 1' are substantially the same as the configurations of the main body 10, upper frame 2, lower frame 3, vertical frame 4, inner vertical frame 4', and reinforcing portion 6 of the middle section 1, and the description of the main body 10, upper frame 2, lower frame 3, vertical frame 4, inner vertical frame 4', and reinforcing portion 6 of the middle section 1 can be cited. The configuration unique to the top section 1' will be described below.

[0069] [L] Reinforcement protruding from the upper frame of the top section of the overhead door As shown in the lower diagram of Figure 27 and Figure 28, a hollow reinforcing part 6' extending across the width of the upper frame 2 protrudes from the upper end of the indoor side part 22 of the upper frame 2 of the top section 1'. As shown in Figure 29, the reinforcing part 6' comprises an upper horizontal surface 60' extending horizontally from the upper end of the indoor side part 22 towards the indoor side, and a lower horizontal surface 61' located below the upper horizontal surface 60' and extending horizontally from the indoor side part 22 towards the indoor side, with the tip side of the upper horizontal surface 60' being an extension part that extends beyond the tip of the lower horizontal surface 61'. A tip vertical surface 62' is formed hanging down from the tip of the extension portion of the upper horizontal surface 60', and a vertical surface 63' is formed parallel to the tip vertical surface 62' and passing through the tip of the lower horizontal surface 61', with the upper end of the vertical surface 63' connected to the upper horizontal surface 60', and the lower ends of the tip vertical surface 62' and the vertical surface 63' being connected by a lower end surface 64'.

[0070] Reinforcing portion 6' has an L-shaped cross section, composed of horizontal portion 6A' extending horizontally from indoor side portion 22 of upper frame 2 toward the inside of the room, and hanging portion 6B' hanging from the end of horizontal portion 6A'. Horizontal portion 6A' of reinforcing portion 6' is formed by upper horizontal surface 60' (excluding the extension) and lower horizontal surface 61', while hanging portion 6B' is formed by the extension of upper horizontal surface 60', tip vertical surface 62', vertical surface 63', and lower end surface 64'. The thickness of hanging portion 6B' is thicker than the thickness of horizontal portion 6A'.

[0071] As shown in the lower diagram of Figure 27, Figures 30 and 32, both widthwise ends of the reinforcing portion 6' in this embodiment do not reach both end portions of the upper frame 2. In other words, the interior side portion 22 of the upper frame 2 has both side portions 220 that do not have the reinforcing portion 6'. The reinforcing portion 6' in this embodiment is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the interior side portion 22 of the upper frame 2, and the side edges 600' at both widthwise ends of the reinforcing portion 6' and the portions of the both side portions 220 extending horizontally from the base ends of the side edges 600' are cut out portions. The cut out portions are cut out so as to be flush with the interior side portion 22.

[0072] The side edge 600' of the reinforcing portion 6' is composed of a first portion 601' extending linearly in a plan view, and a second portion 602' located on the base end side of the first portion 601' and curved in a plan view. That is, in the cutout portion, the corner portion between the base end side portion of the side edge 600' of the reinforcing portion 6' and the portions of both side portions 220 of the indoor side surface portion 22 is curved in a plan view. In this embodiment, the first portion 601' of the side edge 600' is composed of the tip side portion of the hanging portion 6B' and the horizontal portion 6A', and the second portion 602' of the side edge 600' is composed of the base end side portion of the horizontal portion 6A'. In this embodiment, a cover C' is attached to both ends of the reinforcing portion 6' in the width direction so as to cover the portion including the first portion 601' of the side edge 600' of the reinforcing portion 6'.

[0073] A guide roller 11 is provided at the upper end of the indoor side portion of the top section 1'. A roller bracket 17 supporting the roller shaft 110 of the guide roller 11 is fixed to the vertical frame 4 of the top section 1', the indoor side facing portion 42 of the inner vertical frame 4', and the upper end of the indoor side surface portion 40'. Please note that in the embodiment shown in FIG. 5, the support portion 171 supporting the roller shaft 110 is located below the surface portion 170 serving as the fixing portion of the roller bracket 17, and in the embodiment shown in FIG. 39, the support portion 171 supporting the roller shaft 110 is located above the surface portion 170 of the roller bracket 17. The mounting structure of the roller bracket 17 according to this embodiment will be described later.

[0074] The upper end of the center frame 5 of the top section 1' does not reach the upper surface of the top section 1', but abuts or is close to the base end of the lower horizontal surface 61' of the reinforcing part 6'. The connection structure between the lower part of the center frame 5 of the top section 1' and the bottom frame 3 can be explained using the explanation of the connection structure between the lower part of the center frame 5 of the intermediate section 1 and the bottom frame 3. In addition, an attachment for extending the tip side of the reinforcing part 6' may be attached to the reinforcing part 6'. In this case, it will be understood by those skilled in the art that the attachment of the reinforcing part 6' has a different shape and dimensions from the attachment 7 attached to the reinforcing part 6 of the bottom frame 3.

[0075] [M] Reinforcement built into the upper frame of the top section of the overhead door As shown in FIG. 29, a reinforcing material 9 is incorporated into the hollow portion of the upper frame 2 of the top section 1'. As described above, the indoor side portion 22 of the upper frame 2 in this embodiment has both side portions 220 that do not have reinforcing portions. A long reinforcing material 9 is incorporated into the upper frame 2 so as to follow at least the inner surface of both side portions 220. The reinforcing material 9 in this embodiment has a cross-sectional shape that follows the inner surface shape of the upper frame 2, and is incorporated by inserting it into the hollow portion from an opening at the widthwise end of the upper frame 2. In this embodiment, left and right reinforcing materials 9 are incorporated into the hollow portion of the upper frame 2 at the left and right widthwise ends of the upper frame 2 so as to follow the inner surfaces of the left and right side portions 220.

[0076] As shown in Figs. 29, 31 and 33, the reinforcing member 9 according to this embodiment is a long member having a predetermined length, and includes a lower surface portion 90, an indoor side surface portion 91 rising from the indoor side end of the lower surface portion 90, an upper surface portion 92 extending horizontally from the upper end of the indoor side surface portion 91 to the outdoor side, a lower vertical piece 93 rising from the outdoor side end of the lower surface portion 90, and an upper hanging piece 94 hanging down from the outdoor side end of the upper surface portion 92, and includes a first end 95 and a second end 96. An opening is formed between the lower vertical piece 93 and the upper hanging piece 94, and the portion of the reinforcing member 9 corresponding to the indoor side surface portion 91 (the portion facing the indoor side) is open. The reinforcing member 9 according to this embodiment is made of steel, and is obtained by bending a steel plate. In this embodiment, two types of reinforcing materials 9 with different length dimensions are used, and the reinforcing material 9 with the longer length dimension is identified as reinforcing material 9A (Figures 30 and 31), and the reinforcing material 9 with the shorter length dimension is identified as reinforcing material 9B (Figures 32 and 33).

[0077] As shown in FIG. 31, a plurality of rivet holes 900 are formed at intervals in the length direction on the underside 90 of the reinforcing material 9A. A first hole set for fixing a first bracket is formed on the interior side surface 91 of the reinforcing material 9A at a position closer to the first end 95, the first hole set being composed of three holes located at the vertices of an imaginary triangle. The first hole set corresponds to the three bolts S on the upper side of the vertices of an imaginary diamond on the interior facing portion 42 of the vertical frame 4 shown in FIG. 5 and the three holes on the upper side of the vertices of an imaginary diamond on the interior facing portion 42 of the vertical frame 4 shown in FIG. 39. The first hole set is composed of a pop nut notch 910, a pop nut hole 911, and an insertion hole 912 for the bolt S, and a nut 97 is fixed by welding to the rear surface of the interior side surface portion 91 at the rear surface of the insertion hole 912. A second hole set for fixing a second bracket is formed adjacent to the first hole set on the side away from the first end 95, the second hole set being composed of three holes located at the vertices of an imaginary triangle. The second hole set corresponds to the three bolts S above the vertices of the imaginary diamond on the face 40' of the inner vertical stile 4' shown in Fig. 5 and the three holes above the vertices of the imaginary diamond on the face 40' of the inner vertical stile 4' shown in Fig. 39. The second hole set consists of a pop nut hole 911 and insertion holes 912 for the two bolts S, and nuts 97 are fixed by welding to the back side of the indoor side surface part 91, positioned behind the insertion holes 912.

[0078] As shown in FIG. 33, a plurality of rivet holes 900 are formed at intervals in the length direction on the underside 90 of the reinforcing material 9B. A first hole set for fixing a first bracket is formed on the indoor side surface 91 of the reinforcing material 9B at a position closer to the first end 95, the first hole set being composed of three holes located at the vertices of an imaginary triangle. The first hole set corresponds to the three bolts S on the upper side of the vertex of an imaginary diamond on the indoor side facing portion 42 of the vertical frame 4 shown in FIG. 5, and the three holes on the upper side of the vertex of an imaginary diamond on the indoor side facing portion 42 of the vertical frame 4 shown in FIG. 39. The first hole set is composed of a notch 910 for a pop nut and two holes 911 for a pop nut. A second hole set for fixing a second bracket is formed adjacent to the first hole set on the side away from the first end 95, the second hole set being composed of three holes located at the vertices of an imaginary triangle. The second hole set corresponds to the three bolts S above the vertices of the imaginary diamond on the face 40' of the inner stile 4' shown in Figure 5 and the three holes above the vertices of the imaginary diamond on the face 40' of the inner stile 4' shown in Figure 39. The second hole set consists of three pop nut holes 911.

[0079] As shown in Figure 29, when the reinforcing material 9 is incorporated into the hollow portion of the upper frame 2, the lower surface portion 90 of the reinforcing material 9 abuts against the inner surface of the lower surface portion 23 of the upper frame 2 and is fixed with a fastening member (e.g., a blind rivet R), the indoor side surface portion 91 of the reinforcing material 9 abuts against the inner surface of the indoor side surface portion 22 of the upper frame 2 and is fixed with a fastening member (e.g., a bolt S), the upper surface portion 92 of the reinforcing material 9 is close to (or may abut) the horizontal surface 201 of the upper surface portion 20 of the upper frame 2, the lower vertical piece 93 of the reinforcing material 9 is close to (or may abut) the vertical surface 210 of the outdoor side surface portion 21 of the upper frame 2, and the upper hanging piece 94 of the reinforcing material 9 is close to (or may abut) the vertical surface 202 of the upper surface portion 20 of the upper frame 2.

[0080] One end 95 of the reinforcing material 9 coincides with or is close to the widthwise edge of the upper frame 2, and the other end 96 of the reinforcing material 9 is located at least closer to the widthwise center of the upper frame 2 than the widthwise side edge 600' of the reinforcing portion 6. In the embodiment shown in FIG. 30, the length dimension of the reinforcing material 9A is about twice the width dimension of each of the side portions 220. In the embodiment shown in FIG. 32, the other end 96 of the reinforcing material 9B is located at a position extending slightly from each of the side portions 220 toward the widthwise center. In the present invention, it is not excluded to incorporate a reinforcing material over the entire width of the upper frame 2 into the hollow portion of the upper frame 2, but from the viewpoint of reducing the weight of the section 1, it is advantageous to incorporate reinforcing materials 9 that are shorter than the entire width into both left and right end portions of the upper frame 2.

[0081] [N] Mounting structure for roller bracket of overhead door section The roller brackets 17 supporting the roller shaft 110 of the guide rollers 11 are fixed by fastening members (e.g., screws) to upper portions of both widthwise ends on the indoor side surface of the section 1. As shown in Figs. 42 and 43, the roller brackets 17 include a surface portion 170 as a fixed portion fixed to the indoor side surface of the section 1, and a support portion 171 for the roller shaft 110 positioned in a protruding manner relative to the surface portion 170. In the embodiment shown in Figs. 42 and 43, two roller brackets 17 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 171 of the two roller brackets 17.

[0082] In the embodiment shown in Fig. 42, each roller bracket is fixed by three bolts S as shown in a state in which face portion 170 is abutted against the indoor side surface portion of section 1. In the embodiment shown in the upper diagram of Fig. 42, face portion 170 of roller bracket 17 is fixed to the indoor side surface portion of section 1 by tightening all six bolts S into pop nuts.

[0083] In the embodiment shown in Fig. 43, each roller bracket is fixed by two bolts S shown in the example with the surface portion 170 abutting against the indoor side surface of section 1. In the embodiment shown in the upper diagram of Fig. 43, all four bolts S are fastened to pop nuts, thereby fixing the surface portion 170 of the roller bracket 17 to the indoor side surface of section 1. When a large wind pressure acts on section 1, a force acts on the deformation of section 1 such that the roller shaft 110 tilts with the guide roller 11 abutting against the inner surface of the guide rail G, and this force acts on the fixed portion between the roller bracket 17 and the indoor side surface of section 1. In the embodiments shown in the upper diagrams of Figs. 42 and 43, the strength of the mounting portion of the roller bracket depends on the pull-out strength of the pop nuts, which may hinder the improvement of the strength of the section (a conceptual diagram in which the bolt S has moved in the direction of coming out is shown on the right).

[0084] In the embodiments shown in the lower diagrams of Figure 42 and Figure 43, pop nuts located at locations where a larger rotational moment can act when wind pressure acts are replaced with nuts (88, 97). In one embodiment, a back plate with a nut welded to its back surface is prepared, and this back plate is inserted through the hollow portions of the upper frame 2 and the lower frame 3, and fixed to the back surfaces of the indoor side surface portion 22 and the indoor side surface portion 32. In this embodiment, the back plate equipped with the welded nut is the indoor side surface portion 81, 91 of the reinforcement material 8, 9A. This will be explained in more detail below.

[0085] In the embodiment shown in the lower diagram of FIG. 42, among the three bolts S for fixing the surface portion 170 of the roller bracket 17 on the side far from the widthwise end of the section 1 to the indoor side surface portion of the section 1, two bolts S' on the side far from the widthwise end of the section 1 are fastened to nuts 97 provided on the back surface of the indoor side surface portion of the section 1, thereby fixing the surface portion 170 of the roller bracket 17 to the indoor side surface portion of the section 1. Among the three bolts S for fixing the surface portion 170 of the roller bracket 17 on the side close to the widthwise end of the section 1 to the indoor side surface portion of the section 1, one bolt S' on the side far from the widthwise end of the section 1 is fastened to a nut 97 provided on the back surface of the indoor side surface portion of the section 1, thereby fixing the surface portion 170 of the roller bracket 17 to the indoor side surface portion of the section 1. The nut 97 is provided on the back surface of the indoor side surface portion of the section 1 by incorporating a back plate (not shown) with the nut 97 welded to the back surface from the end of the section 1 into the hollow portion of the section 1. In the embodiment described later, the back plate is the indoor side surface portion 91 of the reinforcing material 9A.

[0086] In the embodiment shown in the lower diagram of Figure 43, of the two bolts S that fix the face portion 170 of the roller bracket 17 furthest from the widthwise end of section 1 to the indoor side portion of section 1, one bolt S' furthest from the widthwise end of section 1 is fastened to a nut 88 provided on the back surface of the indoor side portion of section 1, thereby fixing the face portion 170 of the roller bracket 17 to the indoor side portion of section 1. The nut 88 is provided on the back surface of the indoor side portion of section 1 by incorporating a back plate (not shown) with the nut 88 welded to its back surface into the hollow portion of section 1 from the end of section 1. In the embodiment described below, the back plate is the indoor side portion 81 of the reinforcing material 8.

[0087] In this embodiment, the indoor side facing portion 42 of the vertical frame 4 and the indoor side surface portion 40' of the inner vertical frame 4' are located at both widthwise ends of the indoor side surface portion of section 1, and the upper portion of the indoor side facing portion 42 of the vertical frame 4 and the upper portion of the indoor side surface portion 40' of the inner vertical frame 4' are fixed to the indoor side surface portion 22 of the upper frame 2 of section 1. The surface portion 170 of the roller bracket (top roller bracket) 17 of the top section 1' in this embodiment is fixed to the indoor side facing portion 42 of the vertical frame 4 and the indoor side surface portion 22 of the upper frame 2, the indoor side surface portion 40' of the inner vertical frame 4' and the indoor side surface portion 22 of the upper frame 2 with four bolts S, respectively.

[0088] As shown in FIG. 5, the four bolts S are located on the vertices of an imaginary diamond, and the indoor side surface portion 22 of the upper frame 2 is located where the upper three bolts S are fixed. Reinforcement material 9 is incorporated in the hollow portion of the upper frame 2 of the top section 1' at both ends in the width direction, and the indoor side surface portion 91 of the reinforcement material 9 is located on the back surface of the indoor side surface portion 22 of the upper frame 2. In other words, the upper three bolts S are fixed to the portion where the indoor side facing portion 42 of the vertical frame 4 or the indoor side surface portion 40' of the inner vertical frame 4', the indoor side surface portion 22 of the upper frame 2, and the indoor side surface portion 91 of the reinforcement material 9 overlap. The lower bolt S of the four bolts S is fastened to the indoor side facing portion 42 of the vertical frame 4 and the indoor side surface portion 40' of the inner vertical frame 4' by a pop nut.

[0089] As shown in Fig. 31, a first hole set for fixing a first bracket is formed in the indoor side surface portion 91 of the reinforcement material 9A, near the first end 95, and the first hole set consists of three holes located at the vertices of an imaginary triangle. The first hole set consists of a pop nut notch 910, a pop nut hole 911, and an insertion hole 912 for a bolt S, and a nut 97 is fixed by welding to the back surface of the indoor side surface portion 91, located on the back surface of the insertion hole 912. One bolt S' (see Fig. 5) of the upper three bolts S is fastened to the nut 97, and the other two bolts S are fastened to pop nuts.

[0090] A second hole set for fixing a second bracket, consisting of three holes positioned at the vertices of an imaginary triangle, is formed adjacent to the first hole set on the side away from the first end 95. The second hole set consists of a hole 911 for a pop nut and insertion holes 912 for two bolts S, and nuts 97 are fixed by welding to the back surface of the indoor side portion 91, located on the back surface of the insertion holes 912. Two bolts S' (see FIG. 5) of the upper three bolts S are fastened to nuts 97, and one bolt S is fastened to a pop nut.

[0091] As shown in Fig. 33, a first hole set for fastening a first bracket, consisting of three holes positioned at the apexes of an imaginary triangle, is formed in the indoor side surface portion 91 of the reinforcement material 9B at a position closer to the first end 95. A second hole set for fastening a second bracket, consisting of three holes positioned at the apexes of an imaginary triangle, is formed adjacent to the first hole set on the side away from the first end 95. Pop nuts are provided in the three holes in each of the first and second hole sets, and the upper three bolts S are fastened to the pop nuts (see Fig. 39).

[0092] In this embodiment, the roller bracket of the intermediate section is also served by the hinge 16. A surface 163 of a first plate 160 on the upper side of the hinge 16 and a surface 165 of a second plate 161 on the lower side form a fixing portion that fixes the roller bracket to the indoor side portion of the section 1, and a rising piece 166 of the second plate 161 forms a support portion for the roller shaft 110.

[0093] 6, the surface 163 of the first plate 160 of the hinge 16 is fixed to the lower portion of the interior facing portion 42 of the stile 4 and the lower portion of the interior surface portion 40' of the inner stile 4' with three bolts S. The upper bolt S is fastened to the lower portion of the interior facing portion 42 of the stile 4 and the lower portion of the interior surface portion 40' of the inner stile 4' with a pop nut.

[0094] The area where the two lower bolts S are fixed is located at the indoor side surface portion 32 of the bottom frame 3. Reinforcement material 8 is incorporated into the hollow portion of the bottom frame 3 of section 1, located at both ends in the width direction, and the indoor side surface portion 81 of the reinforcement material 8 is located on the back surface of the indoor side surface portion 32 of the bottom frame 3. In other words, the two lower bolts S are fixed to the area where the indoor side surface portion 42 of the vertical frame 4 or the indoor side surface portion 40' of the inner vertical frame 4', the indoor side surface portion 32 of the bottom frame 3, and the indoor side surface portion 81 of the reinforcement material 8 overlap. As shown in Figure 25, three holes 810 for pop nuts are formed in the indoor side portion 81 of the reinforcing material 8, near the first end 86, and an insertion hole 811 for a bolt S' is formed on the side away from the first end 86 with respect to the hole 810 furthest from the first end 86, and a nut 88 is fixed by welding to the back side of the indoor side portion 81, located on the back side of the insertion hole 811.

[0095] Of the three bolts S that secure the first plate 160 of the hinge 16 to the interior facing portion 42 of the vertical frame 4, the lower two bolts S are fastened to pop nuts provided on the back surface of the interior side portion 81 of the reinforcement material 8. Of the three bolts S that secure the first plate 160 of the hinge 16 to the interior face portion 40' of the inner vertical frame 4', the bolt S' (see FIG. 6) farther from the end of section 1 is fastened to a nut 88 provided on the back surface of the interior side portion 81 of the reinforcement material 8.

[0096] The surface portion 165 of the second plate 161 of the hinge 16 is fixed by three bolts S to an upper portion of the indoor facing portion 42 of the stile 4 and an upper portion of the indoor side surface portion 40' of the inner stile 4'. The indoor side surface portion 22 of the upper stile 2 is located at the portion where the upper two bolts S are fixed. In other words, the upper two bolts S are fixed to a portion where the indoor side facing portion 42 of the stile 4 or the indoor side surface portion 40' of the inner stile 4' and the indoor side surface portion 22 of the upper stile 2 overlap. In this embodiment, the three bolts S are fastened by pop nuts to the upper portion of the indoor facing portion 42 of the stile 4 and the upper portion of the indoor side surface portion 40' of the inner stile 4'.

[0097] In this embodiment, in the hinge 16 which also serves as a roller bracket, of the twelve bolts S which fix the surface 163 of the first plate 160, which is the fixed portion of the roller bracket, and the surface 165 of the lower second plate 161, to the indoor side portion of section 1, one bolt S' located furthest from the end of section 1 is fastened to a nut 88 welded to the back surface of the indoor side portion 81 of the reinforcement 8, and the remaining 11 bolts S are fastened to pop nuts.

[0098] [O] Side edge shape of the reinforcement part formed on the frame of the section In this embodiment, the reinforcing portion 6 protruding from the indoor side surface portion 32 of the lower frame 3 of the section 1 and the reinforcing portion 6' protruding from the indoor side surface portion 22 of the upper frame 2 of the top section 1' are both formed by cutting out both end portions from a state in which they are integrally molded with approximately the same width as the indoor side surface portions of the lower frame 3 and the upper frame 2, and the widthwise ends of the reinforcing portions 6, 6' do not reach the both end portions of the lower frame 3 and the upper frame 2, and the indoor side surface portion 32 of the lower frame 3 and the indoor side surface portion 22 of the upper frame 2 have both side portions 320, 220 that do not have the reinforcing portions 6, 6'. In other words, the side edges 600, 600' at both widthwise ends of the reinforcing portions 6, 6' and the portions 320' (cut out flush with the indoor side surface portion 32) of the both side portions 320, 220 extending horizontally from the base ends of the side edges 600, 600' are cut out portions. In the cutout portion, the base end portions of the side edges 600, 600' of the reinforcing portions 6, 6' are curved surfaces in plan view, and the corners between the side edges 600, 600' and both side portions 320, 220 are curved in plan view. In this embodiment, the side edge 600 of the reinforcing portion 6 and the side edge 600' of the reinforcing portion 6' have the same shape in plan view, so hereinafter, both side portions 320 of the indoor side surface portion of the lower frame 3 of section 1 and the side edge 600 of the reinforcing portion 6 will be described.

[0099] When the vertically adjacent sections 1 are in a vertical position, the roller shaft 110 of the guide roller 11 is located below the indoor side surface portion 32 of the lower frame 3 of the upper section 1 (see FIG. 37). The vertically adjacent sections 1 are rotatably connected by the hinges 16, 16', and when the vertically adjacent sections 1 are bent from the vertical position, the lower roller shaft approaches the upper indoor side surface portion 32 (see FIG. 41). Here, the roller shaft 110 extends parallel to and spaced apart from both side portions 320 of the indoor side surface portion 32 in a plan view, but it should be noted that the distance between the both side portions 320 of the indoor side surface portion 32 and the roller shaft 110 varies depending on the height position of the sections 1 constituting the door body D (the protruding dimension of the rising piece 166 of the second plate 161 of the hinge 16 varies depending on the height position of the hinge 16 in the door body D).

[0100] The base end of the roller shaft 110 of the guide roller 11 must be located closer to the width direction end of the section 1 than the vertical plane passing through the first portion 601 of the side edge 600 when it is closest to the upper indoor side surface portion 32. The indoor side surface portion 42 of the vertical frame 4 and the lower portion of the surface portion 40' of the inner vertical frame 4' are fixed to both side portions 320 of the indoor side surface portion 32, and the hinge 16 is fixed to the surface portion 40' of the inner vertical frame 4'. Therefore, the base end of the curved second portion 602 of the side edge 600 (the end of both side portions 320 on the side away from the end of the section 1) is approximately aligned with the second side surface portion 42' of the inner vertical frame 4' (the rising piece 166 of the rising piece 166 of the second plate 161 of the hinge 16 on the side away from the end of the section 1 in a plan view) (see FIG. 40).

[0101] In this embodiment, at the side edge 600, 20% or more of the protruding dimension d1 (the distance from the indoor side surface 32 to the tip vertical surface 66) of the reinforcing part 6 from the indoor side surface 32 is the second part 602. In this embodiment, at the side edge 600, the base end side part of the side edge at both ends in the width direction of the first part 6A of the reinforcing part 6 is the curved second part 602, and more than half of the protruding dimension d2 of the first part 6A from the indoor side surface 32 is the second part 602. In FIG. 41, the curved second part 602 of the side edge 600 that can be adopted in the present invention is shown by multiple curved lines according to the dimensions. Specifically, as the second part 602, arc surfaces (quadrants) of R20, R25, R30, and R35 are shown, and the curved second part 602 according to this embodiment is an arc surface (quadrants) of R35.

[0102] [P] Locking mechanism for overhead door body A locking mechanism is provided in one of the intermediate sections 1. The locking mechanism will be described with reference to Figs. 44 to 48. The locking mechanism is composed of a latch 130 that can protrude from the widthwise end of the intermediate section 1, a latch hook 131 located on the guide rail G, and an operation unit 132 that moves the latch 130 between a locked position and an unlocked position. The latch 130 is provided rotatably at both widthwise ends of the room side part of the intermediate section 1, and can be rotated between an unlocked position in which the latch 130 is located inside the widthwise end of the intermediate section 1 in a plan view, and a locked position in which the latch 130 protrudes outward from the widthwise end of the intermediate section 1. When the opening is fully closed, the latch 130 is placed in the locked position, so that the upper end of the latch 130 approaches the lower end of the latch hook 131 from below.

[0103] A center frame 5 is disposed at the center in the width direction of the intermediate section 1 equipped with a locking mechanism, and an operating unit 132 is provided on a surface portion 50 of the center frame 5. The operating unit 132 and the left and right latches 130 are connected by a wire 133, and when the operating unit 132 is in a first position, the latches 130 are in a locked position, and in conjunction with rotating the operating unit 132 from the first position to the second position, the latches 130 rotate from the locked position via the wire 133 to the unlocked position.

[0104] The latch 130 according to this embodiment is fixed to the indoor side surface 42 of the vertical frame 4 with a bolt via a mounting plate 134. In the intermediate section 1 to which the locking mechanism is attached, a reinforcing plate 420 is fixed by a fastening member (e.g., a blind rivet) across the height direction on the back surface of the indoor side surface 42 of the vertical frame 4 to which the mounting plate 134 is fixed. A bent piece 421 is integrally formed at the width direction end of the reinforcing plate 420. As shown in FIG. 48, a welded nut 422 is provided at a predetermined position on the back surface of the reinforcing plate 420. In this embodiment, four weld nuts 422 are located corresponding to the bolts that fix the mounting plate 134, one weld nut 422 is located at the upper part of the indoor side surface portion 42 corresponding to the lower bolt S' (see FIG. 47) of the second plate 161 of the hinge 16, and one weld nut 422 is located at the lower part of the indoor side surface portion 42 corresponding to the upper bolt S' (see FIG. 47) of the first plate 161 of the hinge 16. The upper and lower ends of the reinforcing plate 420 do not reach the upper and lower ends of the indoor side surface portion 42 of the vertical frame 4, and two holes 423 are formed at the upper end of the reinforcing plate 420 corresponding to the two bolts S on the upper side of the second plate 161 of the hinge 16, and two holes 424 are formed at the lower end of the reinforcing plate 420 corresponding to the two bolts S on the lower side of the first plate 160 of the hinge 16.

[0105] [Q] Effects of the overhead door according to this embodiment [Q-1] Shape of the reinforcement part protruding from the interior side of the lower frame In order to improve the strength of the section 1 and the door body D, a reinforcing part 6 is protruded from the interior side part 32 of the lower frame 3. The reinforcing part 6 has a hollow structure and is shaped so that the height dimension increases as it moves away from the interior side part 32 toward the interior side. This shape is advantageous in terms of the mass-to-strength ratio, and also improves the shape stability of the aluminum extrusion material. The reinforcing part 6 has a hollow structure that reduces the increase in weight, while increasing the cross-sectional area of ​​the tip part on the interior side, and further making the thickness of the tip part (tip vertical surface 66) thicker than the thickness of other parts, thereby effectively ensuring strength relative to the amount of material used. Furthermore, the surface of the reinforcing part 6 consists of an inclined surface, a horizontal surface, and a vertical surface, and has no corners, so that dirt and dust do not accumulate, cleaning is easy, and maintenance is also good. By making the base end portion (first portion 6A) of the reinforcing portion 6 a hollow structure (if it is made into a plate-shaped portion, it cannot be made thick due to molding), the strength of the base end portion of the reinforcing portion 6 can be ensured.

[0106] [Q-2] Curved shape of the base end of the side edge of the reinforcement part protruding from the frame A reinforcing portion 6 protrudes from the interior side surface portion 32 of the lower frame 3 of section 1, but both widthwise ends of the reinforcing portion 6 do not reach both widthwise ends of the lower frame 3, ensuring mounting space for the roller brackets 17. This reinforcing portion 6 is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the interior side surface portion 32 of the lower frame 3, and the interior side surface portion 32 has both side portions 320 that do not have the reinforcing portion 6, and the side edges 600 at both widthwise ends of the reinforcing portion 6 and the portions of both side portions 320 that extend horizontally from the base ends of the side edges 600 are cut-out portions, and there was a risk that stress would concentrate in these cut-out portions, which would hinder the improvement of the strength of section 1. In this embodiment, the corners (areas where stress is likely to concentrate, for example, where stress concentration is large when cut at a right angle) between the base end side portion (second portion 602) of the side edge 600 of the reinforcing portion 6 and the portions of both side portions 320 in the cutout portion are curved in a plan view, thereby improving the strength of the section 1. Also, the weight increase caused by increasing the R of the curved portion is limited.

[0107] The reinforcing portion 6' protruding from the interior side surface portion 22 of the upper frame 2 of the top section 1' is also formed by cutting out both end portions from a state in which it is integrally molded with approximately the same width as the interior side surface portion 22 of the upper frame 2, similar to the reinforcing portion 6 protruding from the interior side surface portion 32 of the lower frame 3. The interior side surface portion 22 has both side portions 220 that do not have the reinforcing portion 6', and the side edges 600' at both ends of the width direction of the reinforcing portion 6' and the portions of the both side portions 220 that extend horizontally from the base ends of the side edges 600' are cutout portions. In this embodiment, the strength of the top section 1' is improved by making the corners (parts where stress is likely to concentrate, for example, when cut out at a right angle) between the base end side portion (second portion 602') of the side edge 600' of the reinforcing portion 6' and the both side portions 220 in the cutout portion curved in plan view. In addition, the weight increase due to the increase in R of the curved portion is limited.

[0108] [Q-3] An attachment that can be attached to the tip of the reinforcement part protruding from the side of the lower frame. In this embodiment, the projection dimension (reinforcement part 6) of the bottom frame 3 is increased to the maximum size that can be manufactured in order to improve the wind pressure resistance of the overhead door section 1, but depending on the site, there is a possibility that the required strength cannot be met. If the plate thickness of the bottom frame 3 including the reinforcement part 6 is increased for the purpose of improving the strength, the design range will be reduced due to the increase in weight, and problems may occur in terms of product costs. An attachment 7 that can be attached to the tip part of the reinforcement part 6 protruding from the indoor side part 32 of the bottom frame 3 is prepared, and by attaching the attachment 7 to the tip part, the tip side of the reinforcement part 6 can be extended so as to be separated from the indoor side part 32. Since the method of attaching the attachment 7 is superior to the method of increasing the plate thickness in terms of mass-to-strength ratio, the use of the attachment 7 makes it possible to improve the strength of the section 1 while minimizing the increase in weight. By preparing multiple types of attachments 7 with different dimensions and shapes, different attachments can be selected according to the strength required at the site, and the expandability of the section 1 is improved.

[0109] By making the attachment 7 a long member having a generally U-shaped cross section consisting of a front surface 70, an upper surface 71, and a lower surface 72, the attachment 7 can be easily attached to the tip of the reinforcing part 6 so as to sandwich the tip, and further, by providing positioning pieces 73, 74 on the lower surface of the upper surface 71 and the upper surface of the lower surface 72 of the attachment 7, the workability of attachment is improved. Furthermore, the U-shaped cross section of the attachment 7 can follow the dimensional accuracy and bending of the lower frame 3.

[0110] [Q-4] Connection structure between the lower part of the middle frame and the lower frame For example, a brand rivet is used to fix the lower portion 501 of the center frame 5 to the hollow lower frame 3. As described above, in this embodiment, in order to improve the strength of the section 1, a hollow reinforcing portion 6 is protruded toward the interior of the room from the interior side portion 32 of the lower frame 3 across the width of the section, and this reinforcing portion 6 has an upper inclined surface 61 that extends diagonally upward toward the interior of the room, and the height dimension gradually increases in the direction away from the interior side portion. This shape of the reinforcing portion 6 is advantageous in terms of the mass-to-strength ratio. However, since the height of the interior side portion 32 of the lower frame 3 is lower than the tip portion of the reinforcing portion 6, it is difficult to drill holes from the interior side using normal equipment (drilling holes in the interior side portion 32 of the lower frame 3 to attach the rivet).

[0111] In this embodiment, the interior side surface portion 32 is extended upward to form a rising piece (consisting of a vertical edge 35 and a horizontal piece 36) on the upper surface portion 30 of the lower frame 3, so that the fastening portion of the fastening member (for example, a brand rivet) can be set above the upper surface portion 32 of the lower frame 3, and it is possible to easily perform hole processing in the vertical piece 35 of the rising piece. This hole processing can be performed not only from the inside of the room but also from the outside of the room. Forming the rising piece limits the increase in weight compared to increasing the height dimension of the entire lower frame 3. The lower portion 501 of the middle frame 5 has its upper side abutting against the vertical piece 35 of the rising piece and its lower side abutting against the interior side surface portion 32 of the lower frame 3, and the upper side (a position farther from the lower end of the middle frame 5) is the fastening portion, so that the strength is improved compared to the case where it is fastened at the lower side (a position closer to the lower end of the middle frame 5). In this embodiment, the rising piece has a horizontal piece 36 integrally formed at its upper end, and the lower ends of the first side portion 51 and the second side portion 52, which are the left and right projecting surfaces of the center frame 5, are close to or in contact with the horizontal piece 36, so that when section 1 is deformed, the horizontal piece 36 of the rising piece abuts against the lower ends of the first side portion 51 and the second side portion 52 of the center frame 5 to support them.

[0112] [Q-5] Reinforcement material built into the hollow part of the lower frame of the section, and reinforcement material built into the hollow part of the upper frame of the top panel A reinforcing portion 6 protrudes from the interior side surface portion 32 of the lower frame 3 of section 1, but both widthwise ends of the reinforcing portion 6 do not reach both widthwise ends of the lower frame 3, ensuring mounting space for the roller brackets 17. This reinforcing portion 6 is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the interior side surface portion 32 of the lower frame 3, and the interior side surface portion 32 has both side portions 320 that do not have the reinforcing portion 6, and the side edges 600 at both widthwise ends of the reinforcing portion 6 and the portions of both side portions 320 that extend horizontally from the base ends of the side edges 600 are cut-out portions, and there was a risk that stress would concentrate in these cut-out portions, which would hinder the improvement of the strength of section 1.

[0113] The strength of section 1 is improved by incorporating reinforcing material 8 into the hollow portion of bottom frame 3 at least over the inner surface of both side portions 320, and by making the length of reinforcing material 8 such that the second end 87 of reinforcing material 8 extends beyond the corners of both side portions 320 and the side edge 600 of reinforcing portion 6. In this embodiment, by incorporating reinforcing material 8 into both ends of the hollow portion of bottom frame 3 in the longitudinal direction, the strength of section 1 is improved while minimizing the weight increase due to the addition of reinforcing material 8. The reinforcing material 8 incorporated into the hollow portion of bottom frame 3 is not a hollow type, but has an opening extending in the longitudinal direction, so that the reinforcing material 8 has a shape that easily deforms in response to the deformation and twisting of bottom frame 3 when it receives wind pressure, and stress concentration on the reinforced member (bottom frame 3) generated by reinforcing material 8 can be suppressed.

[0114] The reinforcing portion 6' protruding from the indoor side portion 22 of the upper frame 2 of the top section 1', like the reinforcing portion 6 protruding from the indoor side portion 32 of the lower frame 3, is formed by cutting out both end portions from a state in which it is integrally molded with approximately the same width as the indoor side portion 22 of the upper frame 2, and the indoor side portion 22 has both side portions 220 that do not have a reinforcing portion 6', and the side edges 600' at both widthwise ends of the reinforcing portion 6' and the portions of the both side portions 220 extending horizontally from the base ends of the side edges 600' are cut-out portions, and there was a risk that stress concentration would occur in these cut-out portions, which would hinder the improvement of the strength of the top section 1'.

[0115] The strength of the top section 1' is improved by incorporating the reinforcing material 9 into the hollow of the upper frame 2 at least over the inner surface of both side portions 220, and by making the length of the reinforcing material 9 such that the second end 96 of the reinforcing material 9 extends beyond the corners of both side portions 220 and the side edge 600' of the reinforcing portion 6'. In this embodiment, the strength of the top section 1' is improved while minimizing the weight increase due to the addition of the reinforcing material 9 by incorporating the reinforcing material 9 into both ends of the hollow of the upper frame 2. The reinforcing material 9 incorporated into the hollow of the upper frame 2 is not a hollow type, but has an opening extending in the length direction, so that the reinforcing material 9 has a shape that easily deforms in response to the deformation of the upper frame 2, and stress concentration on the reinforced member (upper frame 2) generated by the reinforcing material 9 can be suppressed.

[0116] [Q-6] Roller bracket mounting structure using welded nuts The roller brackets 17 supporting the roller shafts 110 of the guide rollers 11 provided at both ends in the width direction of the overhead door section 1 are fixed with bolts to the upper and lower parts of the interior side surface of the section 1, but because the upper and lower parts of the interior side surface of the section 1 are fixed to the hollow upper frame 2 and lower frame 3, the bolts fixing the roller brackets 17 are generally fastened to pop nuts. When a large wind pressure acts on the section 1, a force acts on the section 1 to tilt the roller shaft 110 with the guide roller 11 in contact with the inner surface of the guide rail G as the section 1 deforms, and this force acts on the roller bracket 17 and the fixed parts of the interior side surface of the section 1. At this time, the strength of the mounting part of the roller bracket depends on the pull-out strength of the pop nut, but the pull-out strength of the pop nut may not necessarily be sufficient (see the right side of the upper diagram of Figure 42 and the right side of the upper diagram of Figure 43).

[0117] By replacing at least some of the pop nuts (including those in areas where a greater force is applied, for example at least those pop nuts located furthest from the widthwise end of section 1) with weld nuts 88, 97 welded to the back plate, the strength of the roller bracket mounting portion is improved (see the right side of the lower diagram in Fig. 42 and the right side of the lower diagram in Fig. 43). The back plate on which the weld nuts 88, 97 are provided can also be used by the indoor side portions 81, 91 of the reinforcement members 8 and 9A, and in an embodiment in which the reinforcement members 8 and 9A are provided in the hollow portions of the lower frame 3 and upper frame 2, the weld nuts 88, 97 can be used without increasing the number of parts (without providing a special back plate).

[0118] [Q-7] Center frames arranged closely in the width direction of the section When the overhead door body D is subjected to high wind pressure, the central part of each section 1 in the width direction may bend, and a force may be applied to cause the central part of each section 1 in the width direction to expand vertically, which may cause the components that make up each section 1 (upper frame 2, lower frame 3, main body 10, etc.) to deform or the fastening parts to come loose.

[0119] In this embodiment, in a section 1 having a main body 10, left and right vertical frames 4, inner vertical frames 4', upper frame 2, lower frame 3, and a plurality of center frames 5 arranged to bridge the upper frames 3 and the lower frames 3, the center frames 5 are densely arranged in the widthwise center side (a part that is more likely to bend when subjected to wind pressure) compared to both ends in the widthwise direction of each section 1, thereby suppressing the vertical opening of the section 1 and preventing as much as possible the risk of deformation of the members (upper frame 2, lower frame 3, main body 10, etc.) constituting each section 1 and the disconnection of fastening parts. Depending on the material of the main body 10 of the section 1 and the strength required for the section 1, the required number of center frames 5 can be appropriately incorporated, and the strength of the section can be improved while minimizing the weight increase associated with the addition of center frames 5.

[0120] [Q-8] Mid-section vertical frame with locking mechanism The strength of the middle section 1 can be improved by providing a reinforcing plate 420 on the back surface of the interior facing portion 42 of the vertical frame 4 of the middle section 1 equipped with a locking device. The strength of the reinforcing plate 420 is improved by integrally forming bent pieces (ribs) 421 on both ends of the width direction of the reinforcing plate 420. Furthermore, a nut 422 is welded to a predetermined location on the back surface of the reinforcing plate 420, and a bolt that fixes the mounting plate 134 of the latch 130 to the interior facing portion 42 of the vertical frame 4 is fastened to the nut 422. The strength of the fastening portion when the bolt is fastened to the welded nut 422 is improved compared to the strength of the fastening portion when the bolt is fastened to a pop nut. In addition, by replacing one of the pop nuts to which the multiple bolts that fix the hinge 16 to the interior facing portion 42 of the vertical frame 4 are fastened with the welded nut 422 provided on the reinforcing plate 420, the stress acting on the fastening portion of the hinge 16 can be dispersed. [Explanation of symbols]

[0121] 1 Section 1´ Top Section 2 Upper stile 3 Lower stile 4 Vertical frame 4´ inner stile 5 Middle stile 6 Reinforcement 6´ Reinforcement 7 Attachment 8 Reinforcement 9 Reinforcement 9A Reinforcement 9B Reinforcement 10 Main unit 11 Guide roller 110 Roller shaft 16 Hinge 17 Roller bracket

Claims

1. Left and right roller brackets are fixed to both ends of the interior side surface of the section in the width direction by a plurality of fastening members, In each roller bracket, at least a portion of the multiple fastening members is fixed to the interior facing surface of the lower frame or the upper frame having a hollow portion, The hollow portion is provided with a back plate, which is located on the back side of the interior facing surface and has at least one nut welded thereto, At least one of the fastening members for fixing the roller bracket is a bolt, and the bolt is fastened to the nut welded to the back plate through the front surface. Mounting structure for overhead door roller bracket.

2. The bolt includes a fastening member located at a position furthest from a widthwise end of the section.

2. The overhead door roller bracket mounting structure according to claim 1.

3. The roller bracket includes a support portion that supports a roller shaft and a fixing portion that is fixed to an indoor side surface portion of the section.

3. The mounting structure for a roller bracket of an overhead door according to claim 1 or 2.

4. The roller bracket is used in combination with a hinge that connects adjacent sections vertically, the hinge comprises a first plate having a first surface portion and left and right first raised pieces, a second plate having a second surface portion and left and right second raised pieces, and a shaft portion rotatably connecting the first plate and the second plate, One of the first raised piece and the second raised piece constitutes the support portion of the roller bracket, The first surface portion and / or the second surface portion constitute the fixing portion of the roller bracket.

4. The overhead door roller bracket mounting structure according to claim 3.

5. The back plate is a part of the reinforcing material incorporated in the hollow portion.

5. The mounting structure for a roller bracket of an overhead door according to claim 1.

6. A hollow reinforcing portion is protruded from the interior side portion of the lower frame and / or upper frame of the section across the width of the section, Both ends of the reinforcing portion in the width direction do not reach both ends of the frame in the width direction, The interior side surface portion has both side portions not provided with the reinforcing portion, The roller brackets are attached to the both side portions, The reinforcing material has an interior side surface portion located at least on the inner surface of each of the two side portions, and the nut is welded to the back surface of the interior side surface portion.

6. The overhead door roller bracket mounting structure according to claim 5.

7. A hole for a pop nut is formed on the interior side surface of the reinforcing material, At least a part of a fastening member for fixing the roller bracket is a bolt fastened to the pop nut.

7. The overhead door roller bracket mounting structure according to claim 6.

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