Overhead door section

Abstract

To improve strength of a section of an overhead door including a rail in which a reinforcement part is installed in projecting manner.SOLUTION: In an indoor side surface part 32 of a bottom rail 3 of a section 1, a hollow reinforcement part 6 is formed and projects over a width direction of the section 1. An attachment 7 can be mounted to a tip end portion of the reinforcement part 6. By mounting the attachment 7 to the tip end portion of the reinforcement part 6, the tip end side of the reinforcement part 6 can extend so as to separate from the indoor side surface part 32.SELECTED DRAWING: Figure 20

Description

[Technical Field]

[0001] The present invention relates to an overhead door, and more particularly to an overhead door section having excellent wind pressure resistance. [Background technology]

[0002] Overhead doors are known as fixtures installed in building openings that connect the indoor and outdoor areas of buildings such as warehouses and garages. While their construction is designed to take into consideration external pressure (wind pressure from the outdoors) and weatherproofing, they may not be sufficiently resistant to internal pressure (wind pressure from the indoors). Since overhead doors must be able to withstand a certain amount of internal pressure depending on their installation location, measures have been taken to increase their strength against internal pressure. Typically, reinforcing members are provided above (the interior side of the upper frame) or below (the interior side of the lower frame) the interior portion of each section that makes up the door body. Patent Documents 1 and 2 disclose reinforcing members provided on the interior side of the lower frame of a section.

[0003] The wind resistance of an overhead door can be improved by providing a protruding reinforcing member on the interior side of the section's bottom stile, but the strength required for the overhead door can vary depending on the installation site, and an overhead door equipped with the provided reinforcing member may not be able to meet the required strength. Increasing the thickness of the bottom stile, including the reinforcing member, is considered to improve wind resistance, but this increases weight, narrowing the design range and potentially creating problems in terms of product cost. [Patent Document 1] JP 7-293142 [Patent Document 2] Patent Publication No. 2001-311370 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] The present invention aims to improve the strength of an overhead door section having a stile with a protruding reinforcement. [Means for solving the problem]

[0005] The technical means adopted by the present invention are: A hollow reinforcing portion is protruded from the interior side surface of the lower frame and / or upper frame of the section across the width direction of the section, An attachment can be attached to the tip of the reinforcing part, By attaching an attachment to the tip portion of the reinforcing portion, the tip side of the reinforcing portion can be extended so as to be separated from the indoor side surface portion. Overhead door section.

[0006] In one embodiment, the reinforcing portion is protruded from the indoor side surface of the lower frame of the section, The reinforcing portion has a portion whose height dimension increases toward the interior side of the room, The tip portion is located distal to the portion. In one embodiment, the upper and lower surfaces of the tip portion of the reinforcing portion are horizontal surfaces.

[0007] In one embodiment, the attachment is a long member having an approximately U-shaped cross section from an upper piece, a lower piece, and a front surface, The upper piece includes an extension portion on a side closer to the front surface and a fixing portion on a side farther from the front surface, The lower piece includes an extension portion on a side closer to the front surface and a fixing portion on a side farther from the front surface, the attachment is configured so that the fixing portion of the upper piece can be fixed to an upper surface of the tip portion of the reinforcing part, and the fixing portion of the lower piece can be fixed to a lower surface of the tip portion, When the attachment is attached to the tip portion, the extension of the upper piece, the extension of the lower piece, and the front surface are located closer to the interior of the room than the tip portion. In one embodiment, a positioning portion is formed on the lower surface of the upper piece and the upper surface of the lower piece of the attachment, located at the boundary between the extension portion and the fixing portion, and abutting against the tip portion of the reinforcing portion. In one embodiment, in the attachment, the plate thickness of the front surface is greater than the plate thicknesses of the upper piece and the lower piece. In one embodiment, the thickness of the extension portion of the upper and lower pieces of the attachment is greater than the thickness of the fixing portion. [Effects of the Invention]

[0008] In this invention, an attachment is provided that can be attached to the tip of a reinforcing section that protrudes from the interior side of a stile (mainly the lower stile). By attaching the attachment to the tip, the tip of the reinforcing section can be extended away from the interior side. The attachment method has an advantage over the method of increasing plate thickness in terms of strength-to-mass ratio, and by using the attachment, it is possible to improve the strength of the section while minimizing the weight increase. Furthermore, by preparing multiple types of attachments with different dimensions and shapes, different attachments can be selected to meet the strength required at the site, improving the scalability of the section. [Brief explanation of the drawings]

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

[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 made up 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 direction 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 Figures 10, 12, etc., section 1 is composed of a horizontally rectangular main body 10 extending across substantially the entire width of the building opening, a long upper frame 2 located at the top end of main body 10 and extending horizontally across the entire width of section 1, a long lower frame 3 located at the bottom end of main body 10 and extending horizontally across the entire width of section 1, left and right vertical frames 4 connecting both widthwise ends of upper frame 2 and lower frame 3 in the height direction, and multiple center frames 5 connecting predetermined widthwise intermediate portions of upper frame 2 and lower frame 3 in the height direction. In this embodiment, end center frames or inner vertical frames 4' are provided adjacent to the inside of vertical frames 4. The inner vertical frames 4' and center frames 5 may be partially connected to main body 10.

[0012] In this specification, section 1 includes a top section, a middle section, and a bottom section. However, when describing the top section, it may be referred to as a "top section 1'," and when describing the bottom section, it may be referred to as a "bottom section 1" to distinguish it from the middle section 1. A reinforcing section 6 for improving wind pressure resistance is integrally formed on the lower frame 3 of section 1 (top section, middle section, bottom section). The shape of the top section 1' differs from that of the other sections 1 in that the reinforcing section 6 is integrally formed on the lower frame 3 and that the reinforcing section 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 section 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 breaks, 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 via hinges 16, 16', and the vertically adjacent sections 1 can rotate around the rotation axes of the hinges 16, 16'. More specifically, the hinge 16 is provided so as to straddle the indoor-side facing portions 42 of the vertical stiles 4 and inner vertical stiles 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 stile 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 stile 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 the stepped 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 Figure 2, the guide rail G consists of a first section G1 extending in the height direction of the opening, a curved second section G2 extending rearward from above the first section G1 toward the interior of the room, and a third section G3 extending rearward from behind the second section G2 along the ceiling CL. The first section G1 slopes gently upward toward the interior of the room. The third section G3 slopes gently upward toward the interior of the room.

[0016] When the opening is fully closed, each section 1 is positioned at the first portion G1 of the guide rail G, with the multiple sections 1 in a nearly vertical position, closing the opening. From the fully closed state, each section 1 is raised from a nearly vertical position to a nearly horizontal position (gentle inclination position) 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 journaled at both ends of the rotating shaft 13, the other end of which is connected to both the 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] It should be noted that in this specification, the terms "outdoor side" and "indoor side" are not only used to mean that a certain element actually faces or is located inside or outside the room, but are also used to define the relative positional relationship between multiple components. Furthermore, the terms "upper" and "lower" define the elements of a section based on the section being in a vertical position. The section configurations described below are merely examples and do not limit the scope of the present invention.

[0019] [B] Overview of overhead door sections The details of the configuration of the sections 1 that make up the door body D of the overhead door will be described mainly based on the middle section 1. Figures 10 to 25 are primarily shown for the middle section 1 according to this embodiment, but it should be noted that there are several different configurations. While the common feature is that a reinforcing portion 6 protrudes from the interior side of the stile 3, there are configurations in which an attachment 7 is attached to the interior-side tip of the reinforcing portion 6 (Figs. 20 and 21) and configurations in which no attachment 7 is attached (Figs. 12 and 13). Furthermore, there are configurations in which the stiles 5 of the stile 3 are spaced evenly across the width (Fig. 4) and configurations in which the stiles 5 are densely spaced in the center of the width (Figs. 1, 8, and 9). It should be noted that these configurations are not limited to the stiles 3 of the middle section 1, but can also be applied to the stiles 3 of the top section 1' and the stiles 3 of the bottom section 1''.

[0020] We will now explain the main body 10 of section 1. As shown in Figures 10 and 12, the main body 10 of section 1 is a long plate extending across almost the entire width of section 1, and an upper frame 2, a lower frame 3, and left and right vertical frames 4 are provided around the four periphery 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 corrugated (uneven) shape when viewed from the side or in a cross section. The main body 10 of 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 section 1 includes an upper vertical surface 100, a central vertical surface 101, and a lower vertical surface 102 located at an interval in the height direction in the outdoor portion, and two trapezoidal convex portions 103 located between the upper vertical surface 100 and the central vertical surface 101 and between the central vertical surface 101 and the lower vertical surface 102 and protruding toward the indoor side. The indoor-facing vertical surfaces of the convex portions 103 form the upper intermediate surface 104 and the lower intermediate surface 104 of the main body 10. The main body 10 has 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 extrusions. The upper frame 2 and lower frame 3 according to this embodiment are hollow types formed in a hollow shape, but they may also be solid types without a hollow portion (see Figure 26).

[0023] [C] Upper stile 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 essentially the same except that the latter has a reinforcing portion 6', so here we will explain the upper frame 2 of section 1 while referring to the upper frame 2 of the top section 1.

[0024] 12 and 29, the upper frame 2 of the middle section 1 has an upper surface 20, an exterior side surface 21 which faces the outside of the room, a vertical indoor side surface 22 which faces the inside of the room, and a horizontal lower surface 23, with the upper surface 20 of the upper frame 2 forming the upper surface of the section 1. The hollow space surrounded by the upper surface 20, the exterior side surface 21, the indoor side surface 22, and the lower surface 23 extends across 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 indoor horizontal surface 201. The exterior side surface portion 21 is composed 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 horizontal surface 200 of the upper surface 20 protrudes slightly outside the room beyond the vertical surface 210 of the outdoor side surface portion 21, and a hanging piece 24 is formed at the tip of the outdoor horizontal surface 200 of the upper 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 (for example, a rivet).

[0026] [D] Bottom stile of overhead door section The stile 3 of section 1 will now be described. As shown in Figures 12 and 24, the stile 3 of the middle section 1 has a horizontal upper surface 30, an exterior side surface 31 that faces the exterior, a vertical indoor side surface 32 that faces the interior, and a lower surface 33. The lower surface 33 of the stile 3 forms the underside of section 1. A hollow space surrounded by the upper surface 30, the exterior side surface 31, the indoor side surface 32, and the lower surface 33 extends across the entire width of the long stile 3. The lower surface 33 is formed in a stepped shape from an exterior horizontal surface 330, an indoor horizontal surface 331 that extends horizontally at a height higher than the horizontal surface 330, and an intermediate vertical surface 332 that connects the exterior horizontal surface 330 and the indoor 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 surface 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 first surface on the outdoor side of the lower vertical surface portion 102 of the main body 10 abuts against the inner surface of the rising piece 34, and the second surface on the indoor side of the lower vertical surface portion 102 abuts against the outer surface of the vertical surface 310, and is fixed to the lower frame 3 with a fastening member (for example, a rivet).

[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 outside of the room is integrally formed at the upper end of the vertical piece 35. The vertical piece 35 and horizontal piece 36 form a rising piece that is L-shaped in side view. The vertical piece 35 and the indoor side portion 32 form a flush vertical surface. The horizontal piece 36 protrudes to the outside of the room 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., rivet).

[0029] [E] Reinforcement protrusion on bottom stile of overhead door section We will now explain the reinforcing portion 6 formed integrally with the lower frame 3. A hollow reinforcing portion 6 extending across the width of the lower frame 3 protrudes from the interior 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 interior 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 interior portion 32.

[0030] As shown in FIG. 18 , the upper surface of the reinforcing portion 6, in a side view, consists of an upper horizontal surface 60 extending horizontally from the interior side surface portion 32, an upper inclined surface 61 extending diagonally upward from the tip of the upper horizontal surface 60 in a direction away from the interior side surface portion 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 portion 6, in a side view, consists of a lower horizontal surface 63 extending horizontally from the interior side surface portion 32, a lower inclined surface 64 extending diagonally downward from the tip of the lower horizontal surface 63 in a direction away from the interior side surface portion 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 thickness of the tip vertical surface 66 is thicker than the thickness of other parts of the reinforcing portion 66.

[0031] The tip of the upper inclined surface 61 (the base end of the tip upper surface 62) and the tip of the lower inclined surface 64 (the base end of the tip lower surface 65) are connected by a vertical edge 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 edge 68. The intermediate portions of the upper horizontal surface 60 and the lower horizontal surface 63 are connected by two vertical edges 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 surface portion 32 toward the inside of the room, a lower horizontal surface 63 extending horizontally from the indoor side surface portion 32 toward the inside of the room, and a plurality of hollow portions 603, 604, 605 formed between the upper horizontal surface 60 and the lower horizontal surface 63 by being separated by parts of the indoor side surface portion 32, vertical edges 69a, 69b, and vertical edge 68.

[0034] The second portion 6B comprises 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, a tip upper surface 62 extending horizontally from the tip of the upper inclined surface 61 toward the interior side of the room, a tip lower 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 to the tip of the lower inclined surface 64, a tip vertical surface 66 connecting the tip of the tip upper surface 62 to the tip lower 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 substantially triangular or trapezoidal shape in a side view, and a second hollow portion 607 formed by the tip upper surface 62, the tip lower 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 Figure 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 stile 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 surface 62, is located higher than the upper surface portion 30 of the stile 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 surface 65, is located lower than the lower surface portion 33 (the horizontal surface 331 on the indoor side) of the stile 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 stile 3 is located above the tip upper surface 62, and in the illustrated embodiment, the height position of the approximate center of the height dimension of the rising piece (vertical piece 35 + horizontal piece 36) and the tip upper surface 62 is the same.

[0036] As shown in Figures 14, 19, 23, etc., both widthwise ends of the reinforcing portion 6 in 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 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 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 so as to be flush with the interior side surface portion 32.

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

[0038] In this embodiment, the first portion 601 of the side edge 600 comprises the distal end 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 distal upper surface 62, the distal end 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 distal lower surface 65, the side edge of the distal 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 comprises the proximal end portion of the side edge of the upper horizontal surface 60 and the proximal end portion of the side edge of the lower horizontal surface 63.

[0039] [F] Overhead door section stile The vertical frame 4 of section 1 will now be described. As shown in Figures 11, 15, 34, 48, etc., the vertical frame 4 is a long member that extends vertically in the height direction and has a U-shaped cross section consisting of a front surface portion 40, an exterior front surface portion 41, and an interior front surface portion 42. The front surface portion 40 of the vertical frame 4 forms both widthwise end faces of section 1. The upper end portion of the exterior front surface 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 front surface 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 indoor facing portion 42 of the vertical frame 4 of the upper section 1 and the upper portion of the indoor facing portion 42 of the vertical frame 4 of the lower section 1 are connected by a hinge 16.

[0040] The following describes the inner stile 4' of section 1. As shown in Figures 11, 15, 34, etc., the inner stile 4' is a long member that extends perpendicularly in the height direction, and has a hat-shaped cross section made up of a surface portion 40' that is the interior facing surface, a first side surface portion 41' that is the facing surface, a second side surface portion 42', a first facing edge 43', and a second facing edge 44'. The first side surface portion 41', the second side surface 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', and 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 located lower than the upper end of the surface portion 40', 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 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 surface portion 41', the second side surface 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 surface portion 41', the second side surface portion 42', the first visible edge 43', and the second visible edge 44'.

[0041] The upper portion of the face 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 face 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 close to or abut 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 close to or abut 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 vertically adjacent sections 1, the lower portion of the face portion 40' of the inner vertical frame 4' of the upper section 1 and the upper portion of the face portion 40' of the inner vertical frame 4' of the lower section 1 are connected by a hinge 16.

[0042] Vertically adjacent sections 1 are rotatably connected by hinges 16 provided on the vertical stiles 4, the interior facing portions 42 of the inner vertical stiles 4', and the interior surface portions 40' of the sections 1, which are arranged side by side at both widthwise ends of the sections 1. The hinges 16 consist of an upper first plate 160, a lower second plate 161, and a shaft portion 162. The first plate 160 of the hinge 16 is fixed to the vertical stile 4, the interior facing portions 42 of the inner vertical stiles 4', and the lower end portions of the interior surface portions 40' of the section 1 located above. The first plate 160 consists of a surface portion 163 and raised pieces 164 on both left and right ends of the surface portion 163. The second plate 161 of the hinge 16 is fixed to the vertical stile 4, the interior facing portions 42 of the inner vertical stiles 4', and the upper end portions of the interior surface portions 40' of the section 1 located below. The second plate 161 is made up 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 overlaps with an upper portion of the rising piece 166 of the second plate 161, and the 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 rise 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, the roller shaft 110 of the guide roller 11 is supported by four rising pieces 166 arranged side by side in the width direction at the width direction end of the indoor side portion of each section 1. The mounting structure of the roller bracket according to this embodiment will be described later.

[0044] [G] Overhead door section stile The middle frame 5 of section 1 will now be described. The middle frame 5 is fixed in section 1 so as to span between the upper frame 2 and the lower frame 3, and multiple middle frames 5 are provided at intervals across the width of section 1. The middle frames 5 serve to reinforce section 1 and also serve as mounting points for hinges 16'. Please note that, as will be described later, some of the multiple middle frames 5 may include a middle frame (5B) to which no hinge 16' is attached.

[0045] As shown in Figures 11, 17, 22, 34, etc., the stile 5 is a long member extending perpendicularly to the height direction and has a hat-shaped cross section consisting of a surface portion 50, which is the interior facing surface, a first side surface portion 51, a second side surface portion 52, a first facing edge 53, and a second facing edge 54. It has approximately the same cross-sectional shape as the inner stile 4'. The first side surface portion 51 and the second side surface portion 52 extend from both widthwise ends of the surface portion 50, and protrusions 512, 522 extending the entire height of the stile 5 are formed at both widthwise ends of the surface portion 50. While the stile 4 and the inner stile 4' have a height dimension that spans the entire height of the section 1, the height dimension of the stile 5 is slightly shorter than the height dimensions of the stile 4 and the inner stile 4'. As shown in Figures 11 and 22, the upper end of the middle 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 middle frame 5 is located above the reinforcing 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 middle frame 5 are shorter than the overall height of the middle 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 an upper end 510 of the first side surface portion 51 (see FIG. 22), an upper end of the second side surface portion 52, an upper end 530 of the first visible edge 53, and an upper end 540 of the second visible edge 54, and a lower portion 501 located below a lower end 511 of the first side surface portion 51, a lower end of the second side surface portion 52 (not shown, at the same height as the lower end 511), a lower end 531 of the first visible edge 53, and a lower end 541 of the second visible edge 54. As shown in FIG. 17, a hole 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 middle stile 5 to the vertical piece 35 of the rising piece of the lower stile 3 with a fastening member (e.g., a blind rivet). In this specification, the term "screw" includes "bolt."

[0048] As shown in Figure 22, the middle frame 5 has an upper portion 500 of the face portion 50 abutting 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 fastening members (e.g., screws and pop nuts), and a lower portion 501 of the face portion 50 abutting 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 fastening members (e.g., blind rivets). In this embodiment, protrusions (so-called flanges) 512, 522 are integrally formed at the widthwise ends of the upper portion 500 and the lower portion 501 of the face portion 50 of the middle frame 5, thereby improving the strength of the upper portion 500 and the lower portion 501, which are formed only from the face portion.

[0049] Vertically adjacent sections 1 are rotatably connected by hinges 16' provided on the interior-facing surface portions 50 of multiple center frames 5 provided in the widthwise middle of the sections 1 and on the lower horizontal surface 63 of the base end of the reinforcing portion 6 protruding from the bottom frame 3 of the sections 1. The hinges 16' consist of an upper first plate 160', a lower second plate 161', and a shaft portion 162'. As shown in Figure 38, the first plate 160' of the hinge 16' is fixed to the lower horizontal surface 63 of the base end of the reinforcing portion 6 protruding from the interior side surface portion 32 of the bottom frame 3 of the upper section 1, and the second plate 161' of the hinge 16' is fixed to the upper end portion of the interior-facing surface portion 50 of the center frame 5 of the lower section 1.

[0050] [H] Overhead door section stile arrangement In the embodiment shown in Fig. 4, four stiles 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 multiple sections 1 in the height direction, each section 1 comprises a main body 10, left and right vertical stiles 4, an upper stile 2, a lower stile 3, and multiple stiles 5 provided to bridge the upper stiles 2 and the lower stiles 3, and the stiles 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 plurality of middle frames 5 are arranged at equal intervals in the width direction of section 1 and consist of a plurality of first middle frames 5A equipped with hinges 16 for connecting adjacent sections 1 above and below, and a plurality of second middle frames 5B arranged between the plurality of first middle frames 5A located in the central portion in 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 that makes up 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 that makes up 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 odd, one first stile 5A is arranged in the center of the width of section 1, with second stiles 5B arranged on either side of it. When the number of first stiles 5A is even, one second stile 5B is arranged in the center of the width of section 1, with two central first stiles 5A arranged on either side of it, with a second stile 5B arranged adjacent to each central first stile 5A with a gap between them.

[0054] [I] Reinforcement built into the bottom stile of an overhead door section 23 to 25, the reinforcing material 8 incorporated into the bottom frame 3 of section 1 will be described. As described above, the interior side surface portion 32 of the bottom frame 3 in this embodiment has both side portions 320 that do not have reinforcing portions. A long reinforcing material 8 is incorporated into the bottom frame 3 so as to follow the inner surface of at least both side portions 320. The reinforcing material 8 in 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 through an opening at the widthwise end of the bottom frame 3. In this embodiment, left and right reinforcing materials 8 are incorporated into 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 Figure 25, reinforcing member 8 according to this embodiment is a long member having a predetermined length, and comprises upper surface portion 80, indoor side surface portion 81, lower surface portion 82, upper hanging piece 83 on the outdoor side of upper surface portion 80, lower hanging piece 84 on the outdoor side of lower surface portion 82, and lower horizontal piece 85 extending horizontally from the lower end of lower hanging piece 84 to the outdoor side, and has first end 86 and second end 87. An opening extending in the longitudinal direction is formed between upper hanging piece 83 and lower horizontal piece 85, and the portion of reinforcing member 8 corresponding to indoor side surface portion 81 (the portion facing the indoor side) is open. 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 in the top surface 80 of the reinforcing material 8 at intervals in the longitudinal direction. Three pop nut holes 810 are formed in the interior side surface 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 farthest from the first end 86, and a nut 88 is fixed by welding to the back surface of the interior side surface 81, positioned on the back side of the insertion hole 811.

[0057] As shown in FIG. 24 , when the reinforcing material 8 is incorporated into the hollow portion of the lower frame 3, the upper surface portion 80 of the reinforcing material 8 abuts against the inner surface of the upper surface portion 30 of the lower frame 3 and is fixed with a fastening member (for example, a blind rivet), the interior side surface portion 81 of the reinforcing material 8 abuts against the inner surface of the interior side surface portion 32 of the lower frame 3 and is fixed with a fastening member (for example, a screw), and the lower surface portion 82 of the reinforcing material 8 abuts against the inner surface of the interior side surface portion 32 of the lower frame 3 and is fixed with a fastening member (for example, 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 surface 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 bottom surface 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 bottom surface 33 of the bottom frame 3.

[0058] The first end 86 of the reinforcing member 8 is coincident with or close to the widthwise edge of the bottom frame 3, and the second end 87 of the reinforcing member 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, and not by way of limitation, the length of the reinforcing member 8 is at least 1.5 times, e.g., approximately twice, the width of each side portion 320. In the present invention, it is not excluded to incorporate a reinforcing member into the hollow portion of the bottom frame 3 across the entire width of the bottom frame 3, but from the perspective of reducing the weight of the section 1, it is advantageous to incorporate reinforcing members 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 protrudes from the interior side surface 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 members 8' are provided at both widthwise ends of the inner surface of the bottom frame 3' so as to follow the inner surface (the inner surfaces of the upper surface portion 30', interior side surface portion 32' and lower surface portion 33').

[0060] [J] An attachment attached to the tip of the reinforcement 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 so as to be away from the indoor side portion 32.

[0061] 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 comprises an extending 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 comprises an extending 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 protrudes from the lower surface of the upper surface portion 71 of the attachment 7, located at the boundary between the extending portion 710 and the fixed portion 711, and abuts against the tip portion of the reinforcing portion 6. A positioning piece 74 protrudes from the upper surface of the lower surface portion 72, located at the boundary between the extending portion 720 and the fixed portion 721, and abuts against the tip portion of the reinforcing portion 6.

[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 against the upper surface (horizontal upper surface 62) of the tip portion of the reinforcing portion 6, and the fixing portion 721 of the lower surface portion 72 abutting against the lower surface (horizontal lower surface 65) of the tip portion of the reinforcing portion 6.

[0063] When the attachment 7 is 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 inside the room relative to 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 away 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 on site.

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

[0065] In this embodiment, positioning pieces 73 and 74 are provided on the upper surface 71 and the lower surface 72 of the attachment 7, so that the tip portion of the reinforcing portion 6 can be received in the opening of the attachment 7, which is U-shaped in cross section, by placing the attachment 7 so that the upper surface 71 and the lower surface 72 sandwich the upper and lower surfaces of the tip portion of the reinforcing portion 6 and placing the attachment 7 over the opening.The upper positioning piece 73 abuts against the upper portion of the tip portion of the reinforcing 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 reinforcing portion 6 (the corner formed by the tip lower surface 65 and the tip vertical surface 66).This makes it easy to attach the long attachment 7 to the reinforcing 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 example, and the specific shape and configuration of the attachment 7 are not limited to the illustrated example. For example, the attachment may have a hat-shaped cross section, and the legs of the attachment may be fixed to the vertical surface (tip vertical surface 66) of the tip of the reinforcing part 6 with a fastening member (e.g., a screw), thereby extending the tip side of the reinforcing part 6 away from the interior side surface part 32.

[0067] [K] Top section of overhead door The details of the configuration of section 1 have been explained mainly based on the middle section 1, but the basic configuration of the top section 1' and bottom section 1'' is the same as that of the middle section 1, and the explanation of the middle section 1 can be used.

[0068] 27 and 28 show a front view and a longitudinal cross section of the top section 1', and 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 descriptions regarding 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 used. The configuration unique to the top section 1' will be described below.

[0069] [L] Reinforcement protruding from the upper frame of the overhead door top section As shown in the lower diagram of Figure 27 and Figure 28, a hollow reinforcing portion 6' extending across the width of the upper frame 2 protrudes from the upper end of the indoor side surface portion 22 of the upper frame 2 of the top section 1'. As shown in Figure 29, the reinforcing portion 6' comprises an upper horizontal surface 60' extending horizontally from the upper end of the indoor side surface portion 22 toward the inside of the room, and a lower horizontal surface 61' located below the upper horizontal surface 60' and extending horizontally from the indoor side surface portion 22 toward the inside of the room, and the tip side of the upper horizontal surface 60' is an extension portion 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', the upper end of the vertical surface 63' is connected to the upper horizontal surface 60', and the lower ends of the tip vertical surface 62' and the vertical surface 63' are connected by a lower end surface 64'.

[0070] Reinforcing portion 6' has an L-shaped cross section, consisting of horizontal portion 6A' extending horizontally from indoor side surface portion 22 of upper frame 2 toward the interior 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', and 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 surface 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 surface 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 both side portions 220 that extend horizontally from the base ends of the side edges 600' are cutout portions. The cutout portions are cut out so as to be flush with the interior side surface portion 22.

[0072] The side edge 600' of the reinforcement portion 6' is composed of a first portion 601' that extends linearly in a plan view and a second portion 602' that is located on the base end side of the first portion 601' and has a curved shape in a plan view. That is, in the cutout portion, the corners between the base end portion of the side edge 600' of the reinforcement portion 6' and both side portions 220 of the interior side surface portion 22 are curved in a plan view. In this embodiment, the first portion 601' of the side edge 600' is composed of the leading end 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 portion of the horizontal portion 6A'. In this embodiment, covers C' are attached to both ends of the reinforcement portion 6' in the width direction so as to cover the portions including the first portion 601' of the side edge 600' of the reinforcement 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 stile 4 of the top section 1', the indoor-side facing portion 42 of the inner vertical stile 4', and the upper end of the indoor-side surface portion 40'. 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 that serves as the fixing portion of the roller bracket 17, while 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 stile 5 of the top section 1' does not reach the top 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 stile 5 of the top section 1' and the bottom stile 3 can be explained using the same explanation as for the connection structure between the lower part of the stile 5 of the intermediate section 1 and the bottom stile 3. In addition, an attachment for extending the tip end 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 stile 3.

[0075] [M] Reinforcement built into the upper stile of the overhead door top section As shown in Figure 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 interior 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 the inner surface of at least 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 through 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 Figures 29, 31, and 33, the reinforcing member 9 according to this embodiment is a long member having a predetermined length, and is composed of 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 is provided with a first end 95 and a second end 96. An opening extending in the longitudinal direction 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 material 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 , the underside 90 of the reinforcing material 9A has a plurality of rivet holes 900 formed at intervals along its length. A first hole set for fastening a first bracket is formed in the interior side surface 91 of the reinforcing material 9A, near the first end 95. The first hole set corresponds to the three bolts S above the vertices of an imaginary diamond on the interior facing portion 42 of the vertical stile 4 shown in FIG. 5 and the three holes above the vertices of an imaginary diamond on the interior facing portion 42 of the vertical stile 4 shown in FIG. 39 . The first hole set includes a POP nut notch 910, a POP nut hole 911, and an insertion hole 912 for the bolt S. Nuts 97 are welded to the back surface of the interior side surface 91, positioned behind the insertion hole 912. A second hole set for fastening a second bracket is formed adjacent to the first hole set on the side away from the first end 95, and consists of three holes positioned 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 surface 40' of the inner vertical stile 4' shown in Fig. 5 and the three holes above the vertices of the imaginary diamond on the surface 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 two bolts S, and nuts 97 are fixed by welding to the back surface of the interior side surface portion 91, positioned behind the insertion holes 912.

[0078] As shown in FIG. 33 , the underside 90 of the reinforcing material 9B has a plurality of rivet holes 900 spaced apart along its length. A first hole set for fastening a first bracket, consisting of three holes positioned at the vertices of an imaginary triangle, is formed in the interior side surface 91 of the reinforcing material 9B, toward the first end 95. The first hole set corresponds to the three bolts S above the vertices of an imaginary diamond on the interior facing portion 42 of the vertical stile 4 shown in FIG. 5 and the three holes above the vertices of an imaginary diamond on the interior facing portion 42 of the vertical stile 4 shown in FIG. 39 . The first hole set includes a POP nut notch 910 and two POP nut holes 911. A second hole set for fastening 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 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 member 9 is aligned with or close to the widthwise edge of the upper frame 2, and the other end 96 of the reinforcing member 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 Figure 30, the length of the reinforcing member 9A is approximately twice the width of each of the side portions 220. In the embodiment shown in Figure 32, the other end 96 of the reinforcing member 9B is located slightly extending from each of the side portions 220 toward the widthwise center. In the present invention, it is not excluded to incorporate a reinforcing member across the entire width of the upper frame 2 into the hollow portion of the upper frame 2, but from the perspective of reducing the weight of the section 1, it is advantageous to incorporate reinforcing members 9 that are shorter than the entire width into both left and right end portions of the upper frame 2.

[0081] [N] Roller bracket mounting structure for overhead door section The roller brackets 17 that support the roller shafts 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 Figures 42 and 43, the roller brackets 17 include a surface portion 170 as a fixing portion that is fixed to the indoor side surface of the section 1, and a support portion 171 for the roller shaft 110 that is positioned in a cantilevered manner relative to the surface portion 170. In the embodiment shown in Figures 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 Figure 42, each roller bracket is fixed with the three 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 Figure 42, all six bolts S are fastened to pop nuts, thereby fixing the surface portion 170 of roller bracket 17 to the indoor side surface of section 1.

[0083] In the embodiment shown in FIG. 43 , each roller bracket is fixed with two bolts S, as shown, 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, 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, deformation of section 1 causes a force to act that tilts the roller shaft 110 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 roller bracket mounting portion depends on the pull-out strength of the Pop Nut, which may hinder improvements in the strength of the sections (a conceptual diagram showing the bolt S moved in the direction of removal is shown on the right).

[0084] In the embodiments shown in the lower diagrams of Figure 42 and Figure 43, pop nuts located in locations where a larger rotational moment may act when wind pressure is applied 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 lower frame 3 and fixed to the back surfaces of the interior side surface portion 22 and the interior side surface portion 32. In this embodiment, the back plates equipped with welded nuts are the interior side surface portions 81, 91 of the reinforcement members 8, 9A. This will be explained in more detail below.

[0085] In the embodiment shown in the lower diagram of Figure 42, of the three bolts S that secure the surface portion 170 of the roller bracket 17 farther from the widthwise end of section 1 to the interior side surface of section 1, two bolts S' farther from the widthwise end of section 1 are fastened to nuts 97 provided on the back surface of the interior side surface of section 1, thereby securing the surface portion 170 of the roller bracket 17 to the interior side surface of section 1. Of the three bolts S that secure the surface portion 170 of the roller bracket 17 closer to the widthwise end of section 1 to the interior side surface of section 1, one bolt S' farther from the widthwise end of section 1 is fastened to a nut 97 provided on the back surface of the interior side surface of section 1, thereby securing the surface portion 170 of the roller bracket 17 to the interior side surface of section 1. The nut 97 is provided on the back surface of the interior side surface of section 1 by incorporating a back plate (not shown) with the nut 97 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 interior side surface portion 91 of the reinforcing member 9A.

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

[0087] In this embodiment, the indoor facing portion 42 of the stile 4 and the indoor side surface 40' of the inner stile 4' are located at both widthwise ends of the indoor side surface of section 1, and the upper portion of the indoor facing portion 42 of the stile 4 and the upper portion of the indoor side surface 40' of the inner stile 4' are fixed to the indoor side surface portion 22 of the upper stile 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 facing portion 42 of the stile 4 and the indoor side surface portion 22 of the upper stile 2, the indoor side surface portion 40' of the inner stile 4' and the indoor side surface portion 22 of the upper stile 2 with four bolts S, respectively.

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

[0089] As shown in Fig. 31, a first hole set for fastening a first bracket is formed in the interior side surface portion 91 of the reinforcing 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 nuts 97 are fixed by welding to the back surface of the interior side surface portion 91, positioned on the back side 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 welded to the back surface of the interior side surface portion 91, positioned 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 Figure 33, a first hole set for fastening a first bracket is formed in the interior side surface portion 91 of the reinforcement material 9B, near the first end 95, and the first hole set is made up of three holes positioned at the vertices of an imaginary triangle. A second hole set for fastening a second bracket is formed adjacent to the first hole set on the side away from the first end 95, and the second hole set is made up of three holes positioned at the vertices of an imaginary triangle. Pop nuts are provided in the three holes in each of the first and second hole sets, and the three upper bolts S are fastened to the Pop nuts (see Figure 39).

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

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

[0094] The area where the two lower bolts S are fixed is located at the interior 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, positioned at both ends in the width direction, and the interior side surface portion 81 of the reinforcement material 8 is located on the back surface of the interior side surface portion 32 of the bottom frame 3. In other words, the two lower bolts S are fixed to the area where the interior facing portion 42 of the vertical frame 4 or the interior surface portion 40' of the inner vertical frame 4', the interior side surface portion 32 of the bottom frame 3, and the interior 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 surface portion 81 of the reinforcing material 8, closer to the first end 86, and an insertion hole 811 for a bolt S' is formed on the side away from the first end 86 relative to the hole 810 farthest from the first end 86, and a nut 88 is fixed by welding to the back surface of the indoor side surface portion 81, positioned 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 indoor-side facing portion 42 of the stile 4, the lower two bolts S are fastened to pop nuts provided on the back surface of the indoor side surface portion 81 of the reinforcement 8. Of the three bolts S that secure the first plate 160 of the hinge 16 to the indoor-side face portion 40' of the inner stile 4', the lower two bolts S' (see Figure 6) that is the bolt farthest from the end of section 1 is fastened to a nut 88 provided on the back surface of the indoor side surface portion 81 of the reinforcement 8.

[0096] The surface portion 165 of the second plate 161 of the hinge 16 is fixed with three bolts S to an upper portion of the indoor-side 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 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 with pop nuts to an upper portion of the indoor-side facing portion 42 of the stile 4 and an 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 12 bolts S which fix the surface 163 of the first plate 160, which is the fixed part of the roller bracket, and the surface 165 of the lower second plate 161, to the interior side surface 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 interior side surface 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 interior side surface portion 32 of the lower frame 3 of section 1 and the reinforcing portion 6' protruding from the interior side surface portion 22 of the upper frame 2 of 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 interior side surface portions of the lower frame 3 or the upper frame 2, and both widthwise end portions of the reinforcing portions 6, 6' do not reach both end portions of the lower frame 3 or the upper frame 2, and the interior side surface portion 32 of the lower frame 3 and the interior 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 interior 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 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 below we will explain both side portions 320 of the indoor side portion of the bottom frame 3 of section 1 and the side edge 600 of the reinforcing portion 6.

[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 interior 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 hinges 16, 16', and when the vertically adjacent sections 1 are bent from a vertical position, the lower roller shaft approaches the upper interior side surface portion 32 (see FIG. 41). Here, in a plan view, the roller shaft 110 extends parallel to and apart from both side portions 320 of the interior side surface portion 32. However, it should be noted that the distance between the roller shaft 110 and both side portions 320 of the interior side surface portion 32 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] When the base end of the roller shaft 110 of the guide roller 11 is closest to the upper indoor side surface portion 32, it must be located closer to the widthwise end of section 1 than a vertical plane passing through the first portion 601 of the side edge 600. In addition, the indoor-side facing portion 42 of the stile 4 and a lower portion of the surface portion 40' of the inner stile 4' are fixed to both side portions 320 of the indoor side surface portion 32, and further, the hinge 16 is fixed to the surface portion 40' of the inner stile 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 section 1) is approximately aligned with the second side surface portion 42' of the inner stile 4' (the rising piece 166 of the second plate 161 of the hinge 16 on the side away from the end of section 1 in a plan view) (see FIG. 40 ).

[0101] In this embodiment, at the side edge 600, at least 20% of the protrusion dimension d1 (the distance from the interior side surface 32 to the tip vertical surface 66) of the reinforcing portion 6 from the interior side surface 32 constitutes the second portion 602. In this embodiment, at the side edge 600, the base end portions of the side edge at both widthwise ends of the first portion 6A of the reinforcing portion 6 constitute the curved second portion 602, and at least half of the protrusion dimension d2 of the first portion 6A from the interior side surface 32 constitutes the second portion 602. In FIG. 41, the curved second portion 602 of the side edge 600 that can be employed in the present invention is shown with multiple curved lines according to the dimensions. Specifically, the second portion 602 is shown as an arc surface (quadrants) with R20, R25, R30, or R35, and the curved second portion 602 according to this embodiment is an arc surface (quadrants) with R35.

[0102] [P] Locking mechanism of overhead door body A locking mechanism is provided in one of the intermediate sections 1. The locking mechanism will be described with reference to Figures 44 to 48. The locking mechanism comprises 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 operating unit 132 that moves the latch 130 between a locked position and an unlocked position. The latch 130 is rotatably provided at both widthwise ends of the room-side portion of the intermediate section 1, and can be rotated between an unlocked position in which the latch 130 is positioned 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 stile 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 50 of the stile 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 an unlocked position.

[0104] The latch 130 according to this embodiment is fixed with bolts to the interior side surface 42 of the stile 4 via a mounting plate 134. In the intermediate section 1 to which the locking mechanism is attached, a reinforcing plate 420 is fixed by fastening members (e.g., blind rivets) along the height direction to the back surface of the interior side surface 42 of the stile 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 weld nut 422 is provided at a predetermined location on the back surface of the reinforcing plate 420. In this embodiment, four weld nuts 422 are located corresponding to the bolts that secure the mounting plate 134, one weld nut 422 is located at the upper portion 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 portion 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 stile 4, and two holes 423 are formed at the upper end of the reinforcing plate 420 corresponding to the two upper bolts S 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 lower bolts S of the first plate 160 of the hinge 16.

[0105] [Q] Function and effect of the overhead door according to this embodiment [Q-1] Shape of the reinforcement part protruding from the interior side of the lower frame To improve the strength of section 1 and door body D, a reinforcing section 6 is protruded from the interior side surface 32 of the lower frame 3. The reinforcing section 6 has a hollow structure and is shaped so that its height increases as it moves away from the interior side surface 32 toward the interior. This shape is advantageous in terms of the strength-to-mass ratio and improves the shape stability of the aluminum extrusion. The reinforcing section 6's hollow structure minimizes weight while increasing the cross-sectional area of ​​the interior-facing tip. Furthermore, by making the tip (tip vertical surface 66) thicker than the rest of the body, it effectively ensures strength relative to the amount of material used. Furthermore, the surface of the reinforcing section 6 consists of inclined, horizontal, and vertical surfaces, and there are no corners, so dirt and dust do not accumulate, cleaning is easy, and maintenance is also favorable. 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 space for mounting the roller bracket 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 stress concentration occurs in these cut-out portions, which could hinder the improvement of the strength of section 1. In this embodiment, the corners (areas where stress tends 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 on both sides 320 in the cutout portion are curved in plan view, thereby improving the strength of section 1. Furthermore, the weight increase caused by increasing the R of the curved portion is limited.

[0107] Like the reinforcing portion 6 protruding from the interior side surface portion 22 of the upper frame 2 of the top section 1', the reinforcing portion 6' protruding from the interior side surface 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 the interior side surface portion 22 of the upper frame 2 to have approximately the same width. 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 widthwise ends 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 corners of the cutout portions between the base end portion (second portion 602') of the side edge 600' of the reinforcing portion 6' and the both side portions 220 (areas where stress tends to concentrate; for example, if the cutout is at a right angle, stress concentration is large) are curved in a plan view, thereby improving the strength of the top section 1'. Furthermore, the weight increase caused by increasing the 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 portion 6) of the bottom stile 3 is enlarged to the maximum possible size to improve the wind pressure resistance of the overhead door section 1. However, depending on the site, this may not be sufficient to meet the required strength. Increasing the thickness of the bottom stile 3, including the reinforcement portion 6, to improve strength would increase weight, narrowing the design range and potentially creating problems in terms of product cost. An attachment 7 is provided that can be attached to the tip of the reinforcement portion 6 protruding from the interior side portion 32 of the bottom stile 3. By attaching the attachment 7 to the tip, the tip of the reinforcement portion 6 can be extended away from the interior side portion 32. Attaching the attachment 7 has a superior strength-to-mass ratio compared to increasing the thickness of the panel. Therefore, using the attachment 7 improves the strength of the section 1 while minimizing the weight increase. Having multiple types of attachments 7 with different dimensions and shapes available allows users to select different attachments to meet the strength requirements of the site, improving the scalability of the section 1.

[0109] By making the attachment 7 a long member having a generally U-shaped cross section made up 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 by sandwiching the tip, and further, by providing positioning pieces 73, 74 on the underside of the upper surface 71 and the upper surface of the lower surface 72 of the attachment 7, the attachment workability is improved. In addition, 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 To secure the lower portion 501 of the center frame 5 to the hollow bottom frame 3, for example, a brand rivet is used. As described above, in this embodiment, to improve the strength of the section 1, a hollow reinforcement portion 6 is protruded toward the interior of the building from the interior side surface 32 of the bottom frame 3 across the width of the section. This reinforcement portion 6 has an upper inclined surface 61 that extends diagonally upward toward the interior of the building, and its height gradually increases in the direction away from the interior side surface. This shape of the reinforcement portion 6 is advantageous in terms of the mass-to-strength ratio. However, because the height of the interior side surface 32 of the bottom frame 3 is lower than the tip portion of the reinforcement portion 6, it is difficult to drill holes from the interior side using conventional equipment (i.e., drilling holes in the interior side surface 32 of the bottom frame 3 for rivet installation).

[0111] In this embodiment, the interior side surface portion 32 of the upper surface 30 of the stile 3 extends upward to form a raised piece (consisting of a vertical edge 35 and a horizontal piece 36). This allows the fastening portion of the fastening member (e.g., a brand rivet) to be located above the upper surface 32 of the stile 3, facilitating drilling of holes in the vertical piece 35 of the raised piece. This drilling can be performed from both the interior and exterior sides of the room. Forming a raised piece limits the increase in weight compared to increasing the overall height of the stile 3. The lower portion 501 of the stile 5 abuts the vertical piece 35 of the raised piece at its upper side and the interior side surface portion 32 of the stile 3 at its lower side. Since the upper side (farther from the lower end of the stile 5) serves as the fastening portion, strength is improved compared to fastening at the lower side (closer to the lower end of the stile 5). The rising piece in this embodiment has a horizontal piece 36 integrally formed at its upper end, and the lower ends of the first side portion 51 and second side portion 52, which are the left and right projecting surfaces of the middle frame 5, are close to or abut against 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 second side portion 52 of the middle frame 5 to provide support.

[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 space for mounting the roller bracket 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 stress concentration occurs in these cut-out portions, which could 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 along the inner surface of both side portions 320, and by setting the length of reinforcing material 8 so that second ends 87 of reinforcing material 8 extend beyond the corners of both side portions 320 and the side edges 600 of reinforcing portion 6. In this embodiment, by incorporating reinforcing material 8 into both longitudinal ends of the hollow portion of bottom frame 3, the strength of section 1 is improved while minimizing the increase in weight that accompanies the addition of reinforcing material 8. The reinforcing material 8 incorporated into the hollow portion of bottom frame 3 is not hollow, but has openings extending in the longitudinal direction. This allows reinforcing material 8 to easily deform in response to deformation and twisting of bottom frame 3 when subjected to wind pressure, thereby reducing stress concentration on the reinforced member (bottom frame 3) caused by reinforcing material 8.

[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 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 220 extending horizontally from the base ends of the side edges 600' are cut-out portions, and stress concentration occurs in these cut-out portions, which could 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 portion of the upper frame 2, at least along the inner surface of both side portions 220, and by setting the length of the reinforcing material 9 so 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, by incorporating the reinforcing material 9 into both longitudinal ends of the hollow portion of the upper frame 2, the strength of the top section 1' is improved while minimizing the increase in weight due to the addition of the reinforcing material 9. The reinforcing material 9 incorporated into the hollow portion of the upper frame 2 is not hollow, but has openings extending in the longitudinal direction. Therefore, the reinforcing material 9 has a shape that easily deforms in response to deformation of the upper frame 2, and stress concentration on the reinforced member (the upper frame 2) generated by the reinforcing material 9 can be reduced.

[0116] [Q-6] Roller bracket mounting structure using welded nuts Roller brackets 17, which support roller axles 110 of guide rollers 11 located at both widthwise ends of overhead door section 1, are fixed with bolts to the upper and lower portions of the interior side of section 1. However, because the upper and lower portions of the interior side of section 1 are fixed to hollow upper and lower frames 2 and 3, the bolts that secure roller brackets 17 are typically fastened with Pop Nuts. When large wind pressure acts on section 1, deformation of section 1 causes a force to tilt roller axles 110 with guide rollers 11 abutting the inner surface of guide rail G. This force acts on roller bracket 17 and the fixed portions of the interior side of section 1. In this case, the strength of the roller bracket's mounting portion depends on the pull-out strength of the Pop Nut, but the pull-out strength of the Pop Nut may not always be sufficient (see the right side of the upper diagram in Figure 42 and the right side of the upper diagram in Figure 43).

[0117] By replacing at least some of the pop nuts (including those located in areas where greater force is applied, for example, at least those located farthest from the widthwise ends 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 Figure 42 and the right side of the lower diagram in Figure 43). The back plate on which weld nuts 88, 97 are provided can also be used as the interior side portions 81, 91 of reinforcing members 8 and 9A, and in embodiments in which reinforcing members 8 and 9A are provided in the hollow portions of lower frame 3 and upper frame 2, weld nuts 88, 97 can be used without increasing the number of parts (without providing a special back plate).

[0118] [Q-7] Center frames placed closely in the center of the section width When the door body D of an overhead door 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 that causes 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 multiple center frames 5 arranged to span the upper and lower frames 3, the center frames 5 are densely arranged toward the center of each section 1 in the width direction (a region that is more likely to deflect when subjected to wind pressure) compared to both ends of the width direction, thereby suppressing the vertical opening of the section 1 and minimizing the risk of deformation of the members (upper frame 2, lower frame 3, main body 10, etc.) that make up each section 1 or of disconnection of fastening parts. Depending on the material of the main body 10 of the section 1 and the strength required of the section 1, the required number of center frames 5 can be incorporated as appropriate, making it possible to improve the strength of the section while minimizing the increase in weight that accompanies the addition of center frames 5.

[0120] [Q-8] Mid-section stile 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 stile 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 at both widthwise ends of the reinforcing plate 420. Furthermore, nuts 422 are welded to predetermined locations on the back surface of the reinforcing plate 420, and bolts that secure the mounting plate 134 of the latch 130 to the interior facing portion 42 of the vertical stile 4 are fastened to the nuts 422. The strength of the fastened portion when the bolt is fastened to the weld nut 422 is improved compared to the strength of the fastened portion when the bolt is fastened to a pop nut. Furthermore, by replacing one of the pop nuts that fasten multiple bolts that secure the hinge 16 to the interior facing portion 42 of the vertical stile 4 with the weld nut 422 provided on the reinforcing plate 420, stress acting on the fastened 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 Attachments 8 Reinforcement 9 Reinforcement 9A Reinforcement 9B Reinforcement 10 Main Unit 11 Guide roller 110 Roller shaft 16 Hinge 17 Roller bracket

Claims

1. A hollow reinforcing portion is protruded from the interior side surface of the lower frame and / or upper frame of the section across the width direction of the section, An attachment can be attached to the tip of the reinforcing part, The tip portion of the reinforcing part comprises a hollow part having a vertical rectangular shape in a side view, the hollow part being formed by a horizontal tip upper surface, a horizontal tip lower surface, a vertical side, and the tip vertical surface, The attachment is a long member having a substantially U-shaped cross section with a horizontal upper piece, a horizontal lower piece, and a vertical front surface, The plate thickness of the front surface is greater than the plate thicknesses of the upper piece and the lower piece, The upper piece comprises a horizontal extension portion on a side closer to the front surface and a fixed portion on a side farther from the front surface, The lower piece includes a horizontal extension portion on a side closer to the front surface and a fixed portion on a side farther from the front surface, a positioning portion that is located at the boundary between the extension portion and the fixing portion and that abuts against the tip portion of the reinforcing portion is formed on the lower surface of the upper piece and the upper surface of the lower piece of the attachment; The attachment is fixed by fastening members such that the fixing portion of the upper piece is fixed to an upper surface of the tip upper side surface of the tip portion and the fixing portion of the lower piece is fixed to a lower surface of the tip lower side surface of the tip portion, When the attachment is attached to the tip portion, an extension portion having a vertical rectangular shape in a side view is formed from the extension portion of the upper piece, the extension portion of the lower piece, and the front surface, and is located on the indoor side of the tip portion, and the extension dimension of the extension portion is smaller than the height dimension of the extension portion. Overhead door section.

2. In the upper piece, the plate thickness of the extension portion is greater than the plate thickness of the fixed portion, In the lower piece, the plate thickness of the extension portion is greater than the plate thickness of the fixing portion.

10. The overhead door section of claim 1.

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