Overhead door leaf

Abstract

To provide a door body of an overhead door including wind-resistant performance.SOLUTION: In a door body D of an overhead door formed by connecting a plurality of sheets of sections 1 in a height direction, the sections 1 each include a body 10, right and left stiles 4, 4', an upper rail 2, a bottom rail 3, and a plurality of center rails 5 provided so as to extend across the upper rail 2 and the bottom rail 3. The center rails 5 are arranged closely in a width direction center side as compared to the width direction both end sides of each section 1.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to an overhead door, and more particularly to a door body of an overhead door having excellent wind pressure resistance performance.

Background Art

[0002] An overhead door is known as a fitting installed in a building opening that communicates the outdoors and indoors of a building such as a warehouse or a garage. The door body of the overhead door is formed by connecting a plurality of sections. Guide rollers are provided at both ends in the width direction of each section, and the guide rollers are guided by left and right guide rails to move up and down to open and close the building opening.

[0003] When the door body of the overhead door in the fully closed position of the opening receives a high wind pressure, the central portion in the width direction of each section may bend, or a force that causes the central portion in the width direction of each section to spread up and down may act, and the members (for example, the upper frame, the lower frame, the main body, etc.) constituting each section may be deformed or the fastening parts may come off.

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a door body of an overhead door having excellent wind pressure resistance performance.

Means for Solving the Problems

[0005] The technical means adopted by the present invention is In a door body of an overhead door formed by connecting a plurality of sections in the height direction, each section includes a main body, left and right vertical frames, an upper end portion, a lower end portion, and a plurality of middle frames provided so as to span the upper end portion and the lower end portion. The middle frame is densely arranged on the central side in the width direction compared to both end sides in the width direction of each section. It is the door body of an overhead door. In one aspect, the upper end part of the section is the upper frame, and the lower end part is the lower frame.

[0006] In one aspect, the plurality of middle frames include a plurality of first middle frames that are arranged at equal intervals in the width direction of the section and on which hinges for connecting adjacent sections above and below are mounted, and a plurality of second middle frames that are arranged between the plurality of first middle frames located at the central part in the width direction and on which no hinges are mounted. It consists of...

[0007] In one aspect, in each section, the number of the second middle frames is two or three.

Advantages of the Invention

[0008] In the present invention, in each section of the overhead door, by arranging the middle frame densely on the central side in the width direction (the part where deflection is large when receiving wind pressure) compared to both end sides in the width direction of each section, the vertical opening of the section is suppressed, and the possibility that the members constituting each section are deformed or the fastening parts are detached is prevented as much as possible. According to the strength required for the door body of the overhead door, an appropriate number of middle frames can be incorporated into each section as needed. It is possible to improve the strength of the section while minimizing the weight increase associated with the addition of the middle frame.

Brief Description of the Drawings

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Modes for Carrying Out the Invention

[0010] [A] Overall Configuration of the Overhead Door FIG. 1 is a front view of the overhead door in the fully closed position as seen from the indoor side, and FIG. 2 is a side view of the overhead door. The door body D of the overhead door is constituted by rotatably connecting a plurality of horizontally rectangular sections 1 in the height direction by hinges 16, 16'. Guide rollers 11 are rotatably provided at both widthwise ends of each section 1 (see FIG. 3). The door body D opens and closes the building opening by the left and right guide rollers 11 of each section 1 being guided by the left and right guide rails G respectively and rising and falling.

[0011] As shown in FIGS. 10, 12, etc., Section 1 includes a horizontally rectangular main body 10 extending across substantially the entire width of the building opening, a long upper frame 2 positioned at the upper end of the main body 10 and horizontally extending across the entire width of Section 1, a long lower frame 3 positioned at the lower end of the main body 10 and horizontally extending across the entire width of Section 1, left and right vertical frames 4 connecting between both widthwise ends of the upper frame 2 and the lower frame 3 in the height direction, and a plurality of middle frames 5 connecting a predetermined position in the middle in the width direction between the upper frame 2 and the lower frame 3 in the height direction. In this embodiment, an end middle frame or an inner vertical frame 4' is provided adjacent to the inside of the vertical frame 4. The inner vertical frame 4' and the middle frame 5 may be partially connected to the main body 10.

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

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

[0014] In the door body D, in the sections 1 adjacent to each other vertically, the lower end surface of the upper section 1 and the upper end surface of the lower section 1 are shaped so as to fit into each other in the fully-closed posture of the opening. In the present embodiment, the stepped lower end surface and the upper end surface are fitted to each other (see FIGS. 7, 35 to 38), but for example, a concave lower end surface and a convex upper end surface may be fitted to each other.

[0015] As shown in FIG. 2, the guide rail G includes a first portion G1 extending in the height direction of the opening, a curved second portion G2 extending rearward from above the first portion G1 toward the indoor side, and a third portion G3 extending rearward along the ceiling CL from behind the second portion G2. The first portion G1 is gently inclined toward the indoor side from below to above. The third portion G3 is gently inclined upward toward the indoor side.

[0016] In the fully-closed state of the opening, each section 1 is positioned at the first portion G1 of the guide rail G, so that the plurality of sections 1 are in a substantially vertical posture and close the opening. From the fully-closed state of the opening, each section 1 is pulled up from the substantially vertical posture to a substantially horizontal posture (gently inclined posture) positioned at the third portion G3 (the bottom section 1'' at the lowermost position is positioned at the second portion G2), and the door body is in a posture extending laterally along the ceiling CL of the indoor-side space, and the fully-open state of the opening is achieved.

[0017] Above the opening of the building, a rotating shaft 13 equipped with a balance spring 12 is arranged. The other ends of the winding wires 15, one end of which is fixed to the drums 14 pivotally supported at both ends of the rotating shaft 13, are respectively connected to the left and right ends of the bottom section 1'', and the door body in the fully closed position is biased in the opening direction (upward) by the biasing force of the balance spring 12 in the winding-up direction.

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

[0019] [B] Outline of the section of the overhead door Regarding the details of the configuration of the section 1 that constitutes the door body D of the overhead door, it will be mainly described based on the intermediate section 1. The figures related to the intermediate section 1 according to this embodiment are mainly shown in FIGS. 10 to 25, but note that there are several different modes. It is common that a reinforcing portion 6 protrudes on the indoor side of the lower frame 3, but there are a mode of attaching an attachment 7 to the tip portion on the indoor side of the reinforcing portion 6 (FIGS. 20 and 21) and a mode of not attaching the attachment 7 (FIGS. 12 and 13). Further, there are a mode in which the middle frames 5 of the lower frame 3 are arranged at equal intervals in the width direction (FIG. 4) and a mode in which the middle frames 5 are densely arranged at the central portion in the width direction (FIGS. 1, 8, and 9). Also, note that these modes are not only applied to the lower frame 3 of the intermediate section 1, but can also be applied to the lower frame 3 of the top section 1' and the lower frame 3 of the bottom section 1''.

[0020] Describe the main body 10 of Section 1. As shown in FIGS. 10 and 12, the main body 10 of Section 1 is an elongated plate body extending across substantially the entire width of Section 1. The upper frame 2, lower frame 3, and left and right vertical frames 4 are provided around the main body 10. Located at the indoor side portion of the main body 10, the upper frame 2 and the lower frame 3 are bridged So as to transfer , an inner vertical frame 4´ and a middle frame 5 are provided.

[0021] In this embodiment, the main body 10 is a plate body bent and formed in a wavy (concave and convex) shape in side view or cross-sectional view. The main body 10 of Section 1 according to this embodiment is made of steel and is formed by bending a steel plate into a predetermined shape. As shown in FIGS. 11 and 12, the main body 10 of Section 1 includes, at the outdoor side portion, an upper vertical surface portion 100, a central vertical surface portion 101, and a lower vertical surface portion 102 that are spaced apart in the height direction, and two trapezoidal convex portions 103 protruding indoors between the upper vertical surface portion 100 and the central vertical surface portion 101 and between the central vertical surface portion 101 and the lower vertical surface portion 102. The indoor vertical surfaces of the convex portions 103 form the upper intermediate surface portion 104 and the lower intermediate surface portion 104 of the main body 10. The main body 10 includes an upper vertical surface portion 100, a central vertical surface portion 101, and a lower vertical surface portion 102 located at the outdoor side, and an upper intermediate surface portion 104 and a lower intermediate surface portion 104 located at the indoor side. The shape of the illustrated main body 10 is an example, and the configuration of the main body 10 of Section 1 is not limited to the illustrated shape.

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

[0023] [C] Upper Frame of the Section of the Overhead Door The upper frame 2 of Section 1 will be described. Since the configuration of the upper frame 2 of the intermediate section 1 and the configuration of the upper frame 2 of the top section 1' are substantially the same except that the latter has a reinforcing portion 6', here, while referring to the upper frame 2 of the top section 1, the upper frame 2 of Section 1 will be described.

[0024] As shown in FIGS. 12 and 29, the upper frame 2 of the intermediate section 1 includes an upper surface portion 20, an outdoor side surface portion 21 which is an outdoor side finding surface, a vertical indoor side surface portion 22 which is an indoor side finding surface, and a horizontal lower surface portion 23. The upper surface portion 20 of the upper frame 2 serves as the upper surface of Section 1. A hollow portion surrounded by the upper surface portion 20, the outdoor side surface portion 21, the indoor side surface portion 22, and the lower surface portion 23 extends across the entire width of the long upper frame 2. The upper surface 20 is formed in a stepped shape from an outdoor horizontal plane 200, an indoor horizontal plane 201 that extends horizontally at a position higher than the horizontal plane 200, and an intermediate vertical plane 202 that connects the outdoor horizontal plane 200 and the indoor horizontal plane 201. The outdoor side surface portion 21 consists of a lower vertical surface 210 and a concave surface 211 formed in a "く" shape in cross-section integrally formed above the vertical surface 210.

[0025] The tip of the outdoor horizontal plane 200 of the upper surface 20 protrudes slightly outside 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 plane 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 it is fixed to the upper frame 2 with a fastening member (for example, a rivet).

[0026] [D] Lower frame of the section of the overhead door The bottom frame 3 of Section 1 will be described. As shown in FIGS. 12 and 24, the bottom frame 3 of the intermediate section 1 includes a horizontal upper surface portion 30, an outdoor side surface portion 31 which is an outdoor side finding surface, a vertical indoor side surface portion 32 which is an indoor side finding surface, and a bottom surface portion 33. The bottom surface portion 33 of the bottom frame 3 is the bottom surface of Section 1. A hollow portion surrounded by the upper surface portion 30, the outdoor side surface portion 31, the indoor side surface portion 32, and the bottom surface portion 33 extends over the entire width of the long bottom frame 3. The bottom surface 33 is formed in a stepped shape from an outdoor side horizontal surface 330, an indoor side horizontal surface 331 that extends horizontally at a height higher than the outdoor side horizontal surface 330, and an intermediate vertical surface 332 that connects the outdoor side horizontal surface 330 and the indoor side horizontal surface 331. The outdoor side surface portion 31 consists of an upper vertical surface 310 and a concave surface 311 formed in a "U" shape in cross section integrally formed below the vertical surface 310.

[0027] The tip of the outdoor side horizontal surface 330 of the bottom surface 33 protrudes slightly outside 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 side horizontal surface 330 of the bottom 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 it is fixed to the bottom frame 3 with a fastening member (for example, a rivet).

[0028] The indoor side surface portion 32 of the bottom frame 3 extends upward, and a vertical piece 35 that rises vertically from the indoor side end of the upper surface 30 is integrally formed. At the upper end of the vertical piece 35, a horizontal piece 36 that extends outside is integrally formed. A rising piece in an L shape in side view is formed from the vertical piece 35 and the horizontal piece 36. The vertical piece 35 and the indoor side surface portion 32 form a flush vertical surface. The horizontal piece 36 protrudes outside and does not protrude from the vertical surface passing through the indoor side surface portion 32. As will be described later, the lower part of the middle frame 5 is fixed to the vertical piece 35 of the rising piece with a fastening member (for example, a rivet).

[0029] [E]Reinforcing portion protruding from the bottom frame of the section of the overhead door The reinforcing portion 6 integrally formed with the lower frame 3 will be described. A hollow reinforcing portion 6 extending across the width direction of the lower frame 3 protrudes from the indoor side surface portion 32 of the lower frame 3. In the present embodiment, the base end of the reinforcing portion 6 protrudes from a substantially central portion in the height direction of the indoor side surface portion 32 of the lower frame 3. The reinforcing portion 6 includes a portion where the height dimension gradually increases in a direction away from the indoor side portion 32.

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

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

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

[0033] The first part 6A includes an upper horizontal plane 60 extending horizontally from the indoor side surface 32 toward the indoor side, a lower horizontal plane 63 extending horizontally from the indoor side surface 32 toward the indoor side, and a plurality of hollow portions 603, 604, 605 formed by partitioning between the upper horizontal plane 60 and the lower horizontal plane 63 by a part of the indoor side surface 32, vertical sides 69a, 69b, and vertical side 68.

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

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

[0036] As shown in FIGS. 14, 19, 23, etc., both end portions in the width direction of the reinforcing portion 6 according to the present embodiment do not reach both end portions of the lower frame 3. That is, the indoor side surface portion 32 of the lower frame 3 includes both side portions 320 that do not include the reinforcing portion 6. The reinforcing portion 6 according to the present embodiment is formed by notching both end portions from a state of being integrally formed with substantially the same width as the indoor side surface portion 32 of the lower frame 3, and both side edge portions 600 at both ends in the width direction of the reinforcing portion 6 and portions 320' of both side portions 320 extending horizontally from the base ends of the side edge portions 600 are notched portions. The portion 320' that is the notched portion is notched so as to be flush with the indoor side surface portion 32.

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

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

[0039] [F]Vertical frame of the section of the overhead door The vertical frame 4 of Section 1 will be described. As shown in FIGS. 11, 15, 34, 48, etc., the vertical frame 4 is a long member extending vertically in the height direction, and has a U-shaped cross section including a prospective surface portion 40, an outdoor finding portion 41, and an indoor finding portion 42. The prospective surface portion 40 of the vertical frame 4 forms both end faces in the width direction of Section 1. The upper end portion of the outdoor finding portion 41 is fixed to the outdoor side surface portion 21 (vertical surface 210) of the upper frame 2, and the lower end portion is fixed to the outdoor side surface portion 31 (vertical surface 310) of the lower frame 3. The upper end portion of the indoor finding portion 42 is fixed to the indoor side surface portion 22 of the upper frame 2, and the lower end portion is fixed to the indoor side surface portion 32 of the lower frame 3. In Sections 1 adjacent vertically, the lower portion of the indoor finding portion 42 of the vertical frame 4 of the upper Section 1 and the upper portion of the indoor finding portion 42 of the vertical frame 4 of the lower Section 1 are connected by a hinge 16.

[0040] The inner vertical frame 4' of Section 1 will be described. As shown in FIGS. 11, 15, 34, etc., the inner vertical frame 4' is a long member extending vertically in the height direction, and has a hat-shaped cross section including a face portion 40' which is an indoor finding surface, a first side face portion 41' which is a prospective surface, a second side face portion 42', a first finding edge 43', and a second finding edge 44'. The first side face portion 41', the second side face portion 42', the first finding edge 43', and the second finding edge 44' are shorter than the total height of the inner vertical frame 4'. The upper ends of the first side face portion 41', the second side face portion 42', the first finding edge 43', and the second finding edge 44' are located below the upper end of the face portion 40'. The lower ends of the first side face portion 41', the second side face portion 42', the first finding edge 43', and the second finding edge 44' are located above the lower end of the face portion 40'. The face portion 40' has an upper portion located above the upper ends of the first side face portion 41', the second side face portion 42', the first finding edge 43', and the second finding edge 44', and a lower portion located below the lower ends of the first side face portion 41', the second side face portion 42', the first finding edge 43', and the second finding edge 44'.

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

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

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

[0044] [G] Middle frame of the section of the overhead door The middle frame 5 of section 1 will be described. The middle frame 5 is fixed so as to span between the upper frame 2 and the lower frame 3 in section 1, and a plurality of them are provided at intervals in the width direction of section 1. The middle frame 5 has a role of reinforcing section 1 and a role as a mounting portion for the hinge 16'. It should be noted that, as will be described later, there may be a case where a middle frame (5B) to which the hinge 16' is not mounted is included in a part of the plurality of middle frames 5.

[0045] As shown in FIGS. 11, 17, 22, 34, etc., the middle frame 5 is a long member extending vertically in the height direction, and has a hat shape in cross section view from the facing surface 50 which is the indoor-side facing surface, the first side facing surface 51 which is the prospective surface, the second side facing surface 52, the first facing side 53, and the second facing side 54, and has substantially the same cross-sectional shape as the inner vertical frame 4'. Further, the first side facing surface 51 and the second side facing surface 52 extend from both ends in the width direction of the facing surface 50, and protrusions 512 and 522 extending over the entire height of the middle frame 5 are formed at both ends in the width direction of the facing surface 50. While the vertical frame 4 and the inner vertical frame 4' have a height dimension extending over the entire height of section 1, the height dimension of the middle frame 5 is slightly shorter than the height dimensions of the vertical frame 4 and the inner vertical frame 4'. As shown in FIGS. 11 and 22, the upper end of the middle frame 5 is located at the upper end of section 1 (the upper surface portion 20 of the 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 surface portion 51, the second side surface portion 52, the first finding edge 53, and the second finding edge 54 of the middle frame 5 are shorter than the overall height of the middle frame 5. The upper end 510 of the first side surface portion 51 (see FIG. 22), the upper end of the second side surface portion 52 (not shown, at the same height position as the upper end 510), the upper end 530 of the first finding edge 53, and the upper end 540 of the second finding edge 54 are located below the upper end of the surface portion 50. The lower end 511 of the first side surface portion 51 (see FIG. 22), the lower end of the second side surface portion 52 (not shown, at the same height position as the lower end 511), the lower end 531 of the first finding edge 53, and the lower end 541 of the second finding edge 54 are located above the lower end of the surface portion 50.

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

[0048] As shown in FIG. 22, in the middle frame 5, the upper part 500 of the face part 50 abuts against the indoor side face part 22 of the upper frame 2, and the upper part 500 is fixed to the indoor side face part 22 of the upper frame 2 by a fastening member (for example, a screw and a pop nut). The lower part 501 of the face part 50 abuts against the vertical piece 35 of the rising piece of the lower frame 3 and the upper half part of the indoor side face part 32, and the lower part 501 is fixed to the vertical piece 35 of the rising piece of the lower frame 3 by a fastening member (for example, a blind rivet). In the present embodiment, protrusions (so-called flanges) 512 and 522 are integrally formed at the widthwise end portions of the upper part 500 and the lower part 501 of the face part 50 of the middle frame 5, so that the strength of the upper part 500 and the lower part 501 formed only from the face part is improved.

[0049] The adjacent upper and lower sections 1 are pivotally connected by a hinge 16' provided between the indoor side face parts 50 of a plurality of middle frames 5 provided at the middle portion in the width direction of the section 1 and the lower horizontal face 63 on the base end side of the reinforcing part 6 protruding from the lower frame 3 of the section 1. The hinge 16' is composed of an upper first plate 160', a lower second plate 161', and a shaft part 162'. As shown in FIG. 38, the first plate 160' of the hinge 16' is fixed to the lower horizontal face 63 on the base end side of the reinforcing part 6 protruding from the indoor side face part 32 of the lower frame 3 of the section 1 located on the upper side, and the second plate 161' of the hinge 16' is fixed to the upper end part of the indoor side face part 50 of the middle frame 5 of the section 1 located on the lower side.

[0050] [H]Arrangement Structure of Middle Frame of Section of Overhead Door In the aspect shown in FIG. 4, four middle frames 5 are provided at substantially equal intervals in the width direction of each section 1. In contrast, in the aspects shown in FIGS. 1, 8, and 9, in the door body D of the overhead door formed by connecting a plurality of sections 1 in the height direction, each section 1 includes a main body 10, left and right vertical frames 4, an upper frame 2, a lower frame 3, and a plurality of middle frames 5 provided so as to span the upper frame 2 and the lower frame 3. The middle frames 5 are arranged densely on the central side in the width direction compared to both end sides in the width direction of each section 1.

[0051] More specifically, the plurality of middle frames 5 are arranged at equal intervals in the width direction of section 1, and include a plurality of first middle frames 5A with hinges 16 attached thereto for connecting adjacent sections 1 vertically, and a plurality of second middle frames 5B arranged between the plurality of first middle frames 5A located at the central part in the width direction and without hinges attached thereto.

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

[0053] When the number of the first middle frames 5A is odd, one first middle frame 5A is arranged at the central part in the width direction of section 1, and second middle frames 5B are arranged on both sides thereof. When the number of the first middle frames 5A is even, one second middle frame 5B is arranged at the central part in the width direction of section 1, and two central first middle frames 5A are arranged on both sides thereof, and the second middle frames 5B are arranged adjacent to each other with an interval between the central first middle frames 5A.

[0054] [I] Reinforcing material incorporated into the lower frame of the section of the overhead door With reference to FIGS. 23 to 25, the reinforcing material 8 incorporated into the lower frame 3 of section 1 will be described. As described above, the indoor side surface portion 32 of the lower frame 3 according to the present embodiment includes both side portions 320 without a reinforcing portion. In the lower frame 3, a long reinforcing material 8 is incorporated at least along the inner surfaces of both side portions 320. The reinforcing material 8 according to the present embodiment has a cross-sectional shape along the inner surface shape of the lower frame 3, and is inserted and incorporated into the hollow portion from the opening at the width direction end of the lower frame 3. In the present embodiment, in the hollow portion of the lower frame 3, left and right reinforcing materials 8 are incorporated at the left and right ends in the width direction of the lower frame 3 along the inner surfaces of the left and right both side portions 320.

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

[0056] A plurality of holes 800 for rivets are formed at intervals in the length direction on the upper surface portion 80 of the reinforcing member 8. On the indoor side surface portion 81 of the reinforcing member 8, three holes 810 for pop nuts are formed at a position closer to the first end 86 side, and a bolt insertion hole 811 is formed on the side separated from the first end 86 with respect to the hole 810 farthest from the first end 86. On the back surface of the indoor side surface portion 81, a nut 88 is fixed by welding at a position corresponding to the back surface of the insertion hole 811.

[0057] As shown in Fig. 24, in a state where the reinforcing member 8 is incorporated into the hollow portion of the lower frame 3, the upper surface portion 80 of the reinforcing member 8 abuts against the inner surface of the upper surface portion 30 of the lower frame 3 and is fixed by a fastening member (for example, a blind rivet), and the indoor side surface portion 81 of the reinforcing member 8 abuts against the inner surface of the indoor side surface portion 32 of the lower frame 3 and is fixed by a fastening member (for example, a screw). The lower surface portion 82 of the reinforcing member 8 is close to (may abut against) the horizontal surface 331 of the lower surface portion 33 of the lower frame 3, the upper hanging piece 83 of the reinforcing member 8 is close to (may abut against) the vertical surface 310 of the outdoor side surface portion 31 of the lower frame 3, the lower hanging piece 84 of the reinforcing member 8 is close to (may abut against) the vertical surface 332 of the lower surface portion 33 of the lower frame 3, and the lower horizontal piece 85 of the reinforcing member 8 is close to (may abut against) the horizontal surface 330 of the lower surface portion 33 of the lower frame 3.

[0058] The first end 86 of the reinforcing member 8 coincides with or is close to the widthwise edge of the lower frame 3, and the second end 87 of the reinforcing member 8 is located at least on the widthwise center part side of the lower frame 3 rather than the widthwise side edges 600 of the reinforcing part 6. For example, by way of non-limiting example, the length dimension of the reinforcing member 8 is 1.5 times or more, for example, about 2 times the width dimension of each of the both side parts 320. In the present invention, incorporating a reinforcing member extending across the entire width of the lower frame 3 into the hollow part of the lower frame 3 is not excluded, but from the perspective of weight reduction of Section 1, it is advantageous to incorporate a relatively short reinforcing member 8 at the left and right end parts of the lower frame 3 compared to the entire width.

[0059] In this embodiment, a hollow-type lower frame 3 is shown, but the lower frame 3 may be of a solid type. A solid-type lower frame 3' is shown in FIG. 26. As shown in FIG. 26, a reinforcing part 6 is protruded on the indoor side surface part 32' of the lower frame 3', and both widthwise end parts of the reinforcing part 6 do not reach both ends of the lower frame 3'. Reinforcing members 8' are provided along the inner surface (the inner surfaces of the upper surface part 30', the indoor side surface part 32', and the lower surface part 33') at both widthwise end parts of the inner surface of the lower frame 3'.

[0060] [J]An attachment attached to the tip of a reinforcing part protruded on the lower frame of a section of an overhead door As shown in FIGS. 20, 21, 22, 36, and 38, an attachment 7 can be attached to the tip part of the reinforcing part 6 of the lower frame 3 of Section 1 according to this embodiment. By attaching the attachment 7 to the tip part of the reinforcing part 6, the tip side of the reinforcing part 6 can be extended so as to be separated from the indoor side surface part 32.

[0061] As shown in FIGS. 20 and 21, the attachment 7 according to this embodiment is a long member having a substantially U-shaped cross section when viewed in cross section, including a front surface portion 70, an upper surface portion 71, and a lower surface portion 72. The upper surface portion 71 includes an extension portion 710 on the side closer to the front surface portion 70 and a fixing portion 711 on the side farther from the front surface portion 70. The lower surface portion 72 includes an extension portion 720 on the side closer to the front surface portion 70 and a fixing portion 721 on the side farther from the front surface portion 70. On the lower surface of the upper surface portion 71 of the attachment 7, a positioning piece 73 that abuts against the tip portion of the reinforcing portion 6 is protruded at the boundary between the extension portion 710 and the fixing portion 711. On the upper surface of the lower surface portion 72, a positioning piece 74 that abuts against the tip portion of the reinforcing portion 6 is protruded at the boundary between the extension portion 720 and the fixing portion 721.

[0062] The attachment 7 can be fixed, for example, by a fastening member (for example, a rivet) in a state where the fixing portion 711 of the upper surface portion 71 abuts against the upper surface (horizontal tip upper surface 62) of the tip portion of the reinforcing portion 6 and the fixing portion 721 of the lower surface portion 72 abuts against the lower surface (horizontal tip lower surface 65) of the tip portion of the reinforcing portion 6.

[0063] In a state where the attachment 7 is attached to the tip portion of the reinforcing portion 6, the extension portion 710 of the upper surface portion 71, the extension portion 720 of the lower surface portion 72, and the front surface portion 70 are located on the indoor side of the tip vertical surface 66 of the reinforcing portion 6. By attaching the attachment 7 to the tip portion of the reinforcing portion 6, the tip side of the reinforcing portion 6 extends so as to be separated from the indoor side surface portion 32. For example, by preparing a plurality of types of attachments 7 having extension portions 710 and 720 with different dimensions, different attachments 7 can be selected and corresponding to meet the strength requirements on site.

[0064] In the attachment 7, in a state where the attachment 7 is attached to the reinforcing portion 6, the plate thickness of the front surface portion 70 at the position farthest from the indoor side surface portion 32 is larger than the plate thicknesses of the upper surface portion 71 and the lower surface portion 72. Also, in the upper surface portion 71, the plate thickness of the extension portion 710 is larger than the plate thickness of the fixing portion 711, and in the lower surface portion 72, the plate thickness of the extension portion 720 is larger than the plate thickness of the fixing portion 721.

[0065] Since the positioning pieces 73 and 74 are provided on the upper surface portion 71 and the lower surface portion 72 of the attachment 7 according to the present embodiment, the upper surface portion 71 and the lower surface portion 72 sandwich the upper surface and the lower surface of the tip portion of the reinforcing portion 6 so as to receive the tip portion of the reinforcing portion 6 in the opening of the U-shaped attachment 7 in sectional view. The attachment 7 is put on, and the upper positioning piece 73 abuts on the upper portion of the tip portion of the reinforcing portion 6 (the corner portion formed by the tip upper surface 62 and the tip vertical surface 66), and the lower positioning piece 74 abuts on the lower portion of the tip portion of the reinforcing portion 6 (the corner portion formed by the tip lower surface 65 and the tip vertical surface 66). In this state, the attachment 7 can be positioned, so that the workability of attaching the long attachment 7 to the reinforcing portion 6 extending in the width direction of the lower frame 3 of Section 1 is good.

[0066] The attachment 7 according to the present embodiment shows one aspect, and the specific shape and configuration of the attachment 7 are not limited to the illustrated aspect. For example, the leg portion of the hat-shaped attachment in sectional view may be fixed to the vertical surface (tip vertical surface 66) of the tip portion of the reinforcing portion 6 with a fixing member (for example, a screw) so that the tip side of the reinforcing portion 6 extends away from the indoor side surface portion 32.

[0067] [K]Top section of the overhead door Although the details of the configuration of Section 1 have been described mainly based on the intermediate section 1, the basic configurations of the top section 1' and the bottom section 1'' are the same as those of the intermediate section 1, and the description of the intermediate section 1 can be incorporated.

[0068] Figures 27 and 28 show the front view and longitudinal sectional view of the top section 1'. The configurations of the main body 10, upper frame 2 (excluding the reinforcing part 6'), lower frame 3, vertical frame 4, inner vertical frame 4', middle frame 5 (excluding the configuration of the upper end part), and reinforcing part 6 of the top section 1' are substantially the same as those of the main body 10, upper frame 2, lower frame 3, vertical frame 4, inner vertical frame 4', and reinforcing part 6 of the middle section 1. The descriptions of the main body 10, upper frame 2, lower frame 3, vertical frame 4, inner vertical frame 4', and reinforcing part 6 of the middle section 1 can be incorporated by reference. Hereinafter, the configurations specific to the top section 1' will be described.

[0069] [L] Reinforcing part protruding from the upper frame of the top section of the overhead door As shown in the lower part of Figure 27 and Figure 28, a hollow reinforcing part 6' extending across the width direction of the upper frame 2 is protruded at the upper end part of the indoor side surface part 22 of the upper frame 2 of the top section 1'. As shown in Figure 29, the reinforcing part 6' includes an upper horizontal plane 60' horizontally extending inward from the upper end of the indoor side surface part 22, and a lower horizontal plane 61' located below the upper horizontal plane 60' and horizontally extending inward from the indoor side surface part 22. The tip side of the upper horizontal plane 60' is an extending part extending beyond the tip of the lower horizontal plane 61'. A tip vertical plane 62' hanging down from the tip of the extending part of the upper horizontal plane 60' is formed, and a vertical plane 63' passing through the tip of the lower horizontal plane 61' parallel to the tip vertical plane 62' is formed. The upper end of the vertical plane 63' is connected to the upper horizontal plane 60', and the lower ends of the tip vertical plane 62' and the vertical plane 63' are connected by a lower end surface 64'.

[0070] The reinforcing part 6' has an L-shaped cross-section view, including a horizontal part 6A' horizontally extending inward from the indoor side surface part 22 of the upper frame 2 and a hanging part 6B' hanging down from the end of the horizontal part 6A'. The horizontal part 6A' of the reinforcing part 6' is formed by the upper horizontal plane 60' (excluding the extending part) and the lower horizontal plane 61', and the hanging part 6B' is formed by the extending part of the upper horizontal plane 60', the tip vertical plane 62', the vertical plane 63', and the lower end surface 64'. The thickness of the hanging part 6B' is thicker than that of the horizontal part 6A'.

[0071] As shown in FIG. 27 (lower figure), FIG. 30, and FIG. 32, both end portions in the width direction of the reinforcing portion 6' according to the present embodiment do not reach both end portions of the upper frame 2. That is, the indoor side surface portion 22 of the upper frame 2 includes both side portions 220 that do not include the reinforcing portion 6'. The reinforcing portion 6' according to the present embodiment is formed by notching both end portions from a state where it is integrally molded with substantially the same width as the indoor side surface portion 22 of the upper frame 2, and the side edges 600' at both ends in the width direction 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 notched portions. The notched portions are notched so as to be flush with the indoor side surface portion 22.

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

[0073] A guide roller 11 is provided at the upper end portion of the indoor side portion of the top section 1'. Roller brackets 17 for supporting the roller shaft 110 of the guide roller 11 are fixed to the vertical frame 4 of the top section 1', the indoor side finding portion 42 of the inner vertical frame 4', and the upper end portion of the indoor side surface portion 40'. In the aspect shown in FIG. 5, a support portion 171 for supporting the roller shaft 110 is located below the surface portion 170 as the fixing portion of the roller bracket 17, and in the aspect shown in FIG. 39, it should be noted that a support portion 171 for 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 the present embodiment will be described later.

[0074] The upper end of the middle frame 5 of the top section 1' does not reach the upper surface of the top section 1', and abuts or is close to the base end of the lower horizontal plane 61' of the reinforcing part 6'. Regarding the connection structure between the lower part of the middle frame 5 of the top section 1' and the lower frame 3, the description of the connection structure between the lower part of the middle frame 5 of the middle section 1 and the lower frame 3 can be cited. Also, an attachment for extending the tip side of the reinforcing part 6' may be attachable to the reinforcing part 6'. At this time, it is 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 lower frame 3.

[0075] [M] Reinforcing material incorporated in the upper frame of the top section of the overhead door As shown in FIG. 29, a reinforcing material 9 is incorporated in the hollow part of the upper frame 2 of the top section 1'. As described above, the indoor side surface part 22 of the upper frame 2 according to the present embodiment includes both side parts 220 that do not have a reinforcing part. A long reinforcing material 9 is incorporated in the upper frame 2 at least along the inner surfaces of both side parts 220. The reinforcing material 9 according to the present embodiment has a cross-sectional shape along the inner surface shape of the upper frame 2, and is inserted and incorporated into the hollow part from the opening at the widthwise end of the upper frame 2. In the present embodiment, in the hollow part of the upper frame 2, left and right reinforcing materials 9 are incorporated at the left and right ends in the width direction of the upper frame 2 along the inner surfaces of the left and right both side parts 220.

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

[0077] As shown in FIG. 31, a plurality of holes 900 for rivets are formed at intervals in the length direction on the lower surface portion 90 of the reinforcing member 9A. On the indoor side surface portion 91 of the reinforcing member 9A, a first hole set for fixing the first bracket, which is composed of three holes located at the vertices of a virtual triangle, is formed at a position closer to the first end 95 side. The first hole set corresponds to the three bolts S above the vertices of the virtual rhombus on the indoor side finding portion 42 of the vertical frame 4 shown in FIG. 5 and the three holes above the vertices of the virtual rhombus on the indoor side finding portion 42 of the vertical frame 4 shown in FIG. 39. The first hole set consists of a notch 910 for a pop nut, a hole 911 for a pop nut, and an insertion hole 912 for the bolt S. On the back surface of the indoor side surface portion 91, a nut 97 is fixed by welding at a position on the back surface of the insertion hole 912. Adjacent to the side separated from the first end 95 with respect to the first hole set, a second hole set for fixing the second bracket, which is composed of three holes located at the vertices of a virtual triangle, is formed. The second hole set corresponds to the three bolts S above the vertices of the virtual rhombus on the surface portion 40' of the inner vertical frame 4' shown in FIG. 5 and the three holes above the vertices of the virtual rhombus on the surface portion 40' of the inner vertical frame 4' shown in FIG. 39. The second hole set consists of a hole 911 for a pop nut and two insertion holes 912 for the bolt S. On the back surface of the indoor side surface portion 91, a nut 97 is fixed by welding at a position on the back surface of the insertion hole 912.

[0078] As shown in FIG. 33, a plurality of rivet holes 900 are formed at intervals in the length direction on the lower surface portion 90 of the reinforcing member 9B. On the indoor side surface portion 91 of the reinforcing member 9B, a first hole set for fixing the first bracket, which consists of three holes located at the vertices of a virtual triangle, is formed at a position closer to the first end 95 side. The first hole set corresponds to the three bolts S above the vertices of the virtual rhombus on the indoor side finding portion 42 of the vertical frame 4 shown in FIG. 5 and the three holes above the vertices of the virtual rhombus on the indoor side finding portion 42 of the vertical frame 4 shown in FIG. 39. The first hole set consists of a pop nut notch 910 and two pop nut holes 911. Adjacent to the side separated from the first end 95 with respect to the first hole set, a second hole set for fixing the second bracket, which consists of three holes located at the vertices of a virtual triangle, is formed. The second hole set corresponds to the three bolts S above the vertices of the virtual rhombus on the surface portion 40' of the inner vertical frame 4' shown in FIG. 5 and the three holes above the vertices of the virtual rhombus on the surface portion 40' of the inner vertical frame 4' shown in FIG. 39. The second hole set consists of three pop nut holes 911.

[0079] As shown in FIG. 29, in a state where the reinforcing member 9 is incorporated into the hollow portion of the upper frame 2, the lower surface portion 90 of the reinforcing member 9 is in contact with the inner surface of the lower surface portion 23 of the upper frame 2 and is fixed with a fastening member (for example, a blind rivet R), the indoor side surface portion 91 of the reinforcing member 9 is in contact with the inner surface of the indoor side surface portion 22 of the upper frame 2 and is fixed with a fastening member (for example, a bolt S), the upper surface portion 92 of the reinforcing member 9 is close to (may be in contact with) the horizontal plane 201 of the upper surface portion 20 of the upper frame 2, the lower vertical piece 93 of the reinforcing member 9 is close to (may be in contact with) 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 member 9 is close to (may be in contact with) the vertical surface 202 of the upper surface portion 20 of the upper frame 2.

[0080] One end 95 of the reinforcing member 9 coincides with or is close to the widthwise edge of the upper frame 2, and the other end 96 of the reinforcing member 9 is located at least on the center portion side in the width direction of the upper frame 2 rather than the side edge 600' in the width direction of the reinforcing portion 6. In the embodiment shown in FIG. 30, the length dimension of the reinforcing member 9A is about twice the width dimension of each of the both side portions 220. In the embodiment shown in FIG. 32, the other end 96 of the reinforcing member 9B is located at a position slightly extending from each of the both side portions 220 toward the center portion in the width direction. In the present invention, incorporating a reinforcing member extending across the entire width of the upper frame 2 into the hollow portion of the upper frame 2 is not excluded, but from the viewpoint of weight reduction of Section 1, it is advantageous to incorporate the short reinforcing member 9 into the left and right end portions of the upper frame 2 as compared to the entire width.

[0081] [N] Mounting Structure of Roller Bracket for Section of Overhead Door The roller bracket 17 that supports the roller shaft 110 of the guide roller 11 is fixed by fastening members (for example, screws) at upper portions of both end portions in the width direction on the indoor side surface portion of Section 1. As shown in FIGS. 42 and 43, the roller bracket 17 includes a surface portion 170 as a fixing portion fixed to the indoor side surface portion of Section 1, and a support portion 171 of the roller shaft 110 that is positioned in a protruding manner with respect to the surface portion 170. In the embodiment shown in FIGS. 42 and 43, two roller brackets 17 are provided adjacent to each other in the width direction at the widthwise end of the indoor side surface portion of Section 1, and the roller shaft 110 is supported by the support portions 171 of the two roller brackets 17.

[0082] In the embodiment shown in FIG. 42, each roller bracket is fixed by three bolts S exemplified in a state where the surface portion 170 is in contact with the indoor side surface portion of Section 1. In the embodiment shown in the upper figure of FIG. 42, by fastening all six bolts S to pop nuts, the surface portion 170 of the roller bracket 17 is fixed to the indoor side surface portion of Section 1.

[0083] In the embodiment shown in FIG. 43, each roller bracket is fixed by two bolts S, which are exemplified in a state where the surface portion 170 is in contact with the indoor side surface portion of Section 1. In the embodiment shown in the upper diagram of FIG. 43, all four bolts S are fastened to pop nuts, so that the surface portion 170 of the roller bracket 17 is fixed to the indoor side surface portion of Section 1. When a large wind pressure acts on Section 1, as Section 1 deforms, a force acts such that the roller shaft 110 tilts in a state where the guide roller 11 is in contact with the inner surface of the guide rail G, and this force acts on the fixing portion between the roller bracket 17 and the indoor side surface portion of Section 1. In the embodiments shown in the upper diagrams of FIGS. 42 and 43, the strength of the mounting portion of the roller bracket depends on the pull-out strength of the pop nut, which may prevent an improvement in the strength of the section (a conceptual diagram showing movement in the direction in which the bolt S comes out is shown on the right).

[0084] In the embodiments shown in the lower diagrams of FIGS. 42 and 43, pop nuts located at locations where a larger rotational moment may act when wind pressure acts are replaced with nuts (88, 97). In one embodiment, a back plate with nuts welded to the back surface is prepared, and this back plate is incorporated from the hollow portions of the upper frame 2 and the lower frame 3 and fixed to the back surfaces of the indoor side surface portions 22 and 32. In the present embodiment, the back plate provided with welding nuts is the indoor side surface portions 81 and 91 of the reinforcing members 8 and 9A. This will be described in more detail below.

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

[0086] In the embodiment shown in the following figure 43, among the two bolts S that fix the surface portion 170 of the roller bracket 17 on the side far from the widthwise end of section 1 to the indoor side surface portion of section 1, the one bolt S' on the side far from the widthwise end of section 1 is fastened to the nut 88 provided on the back surface of the indoor side surface portion of section 1, whereby the surface portion 170 of the roller bracket 17 is fixed to the indoor side surface portion of section 1. The nut 88 is provided on the back surface of the indoor side surface portion of section 1 by incorporating a back plate (not shown) with the nut 88 welded to the back surface from the end of section 1 into the hollow portion of section 1. In the embodiment described later, the back plate is the indoor side surface portion 81 of the reinforcing member 8.

[0087] In this embodiment, on both end portions in the width direction of the indoor side surface portion of Section 1, the indoor side finding portion 42 of the vertical frame 4 and the indoor side surface portion 40' of the inner vertical frame 4' are located. The upper portion of the indoor side finding portion 42 of the vertical frame 4 and the upper portion of the indoor side surface portion 40' of the inner vertical frame 4' are fixed to the indoor side surface portion 22 of the upper frame 2 of Section 1. The surface portion 170 of the roller bracket (top roller bracket) 17 of the top section 1' according to this embodiment is fixed to the indoor side finding portion 42 of the vertical frame 4 and the indoor side surface portion 22 of the upper frame 2, and the indoor side surface portion 40' of the inner vertical frame 4' and the indoor side surface portion 22 of the upper frame 2 with four bolts S respectively.

[0088] As shown in FIG. 5, the four bolts S are located on the vertices of a virtual rhombus. The indoor side surface portion 22 of the upper frame 2 is located at the portion where the upper three bolts S are fixed. In the hollow portion of the upper frame 2 of the top section 1', the reinforcing members 9 are incorporated at both end portions in the width direction, and the indoor side surface portion 91 of the reinforcing member 9 is located on the back surface of the indoor side surface portion 22 of the upper frame 2. That is, the upper three bolts S are fixed to the portion where the indoor side finding portion 42 of the vertical frame 4 to the indoor side surface portion 40' of the inner vertical frame 4', the indoor side surface portion 22 of the upper frame 2, and the indoor side surface portion 91 of the reinforcing member 9 overlap. The lower one of the four bolts S is fastened to the indoor side finding portion 42 of the vertical frame 4 and the indoor side surface portion 40' of the inner vertical frame 4' by a pop nut.

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

[0090] Adjacent to the side spaced from the first end 95 with respect to the first hole set, a second hole set for fixing the second bracket, which consists of three holes located at the vertices of a virtual triangle, is formed. The second hole set consists of a hole 911 for a pop nut and insertion holes 912 for two bolts S. On the back surface of the indoor side surface portion 91, a nut 97 is fixed by welding at a position located on the back surface of the insertion hole 912. Two of the three upper bolts S (see Fig. 5) are fastened to the nut 97, and one bolt S is fastened to the pop nut.

[0091] As shown in Fig. 33, on the indoor side surface portion 91 of the reinforcing member 9B, a first hole set for fixing the first bracket, which consists of three holes located at the vertices of a virtual triangle, is formed at a position closer to the first end 95 side. Adjacent to the side spaced from the first end 95 with respect to the first hole set, a second hole set for fixing the second bracket, which consists of three holes located at the vertices of a virtual triangle, is formed. Pop nuts are provided in each of the three holes of the first hole set and the second hole set, and the three upper bolts S are fastened to the pop nuts (see Fig. 39).

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

[0093] As shown in Fig. 6, the surface portion 163 of the first plate 160 of the hinge 16 is fixed by three bolts S respectively at the lower part of the indoor side finding portion 42 of the vertical frame 4 and at the lower part of the indoor side surface portion 40' of the inner vertical frame 4'. The upper one bolt S is fastened by a pop nut at the lower part of the indoor side finding portion 42 of the vertical frame 4 and at the lower part of the indoor side surface portion 40' of the inner vertical frame 4'.

[0094] The portion where the two lower bolts S are fixed is located at the indoor side surface portion 32 of the lower frame 3. In the hollow portion of the lower frame 3 in Section 1, the reinforcing members 8 are incorporated at both end portions in the width direction, and the indoor side surface portion 81 of the reinforcing member 8 is located on the back surface of the indoor side surface portion 32 of the lower frame 3. That is, the two lower bolts S are fixed to the portion where the indoor side finding portion 42 of the vertical frame 4 or the indoor side surface portion 40' of the inner vertical frame 4', the indoor side surface portion 32 of the lower frame 3, and the indoor side surface portion 81 of the reinforcing member 8 overlap. As shown in FIG. 25, three pop nut holes 810 are formed in the indoor side surface portion 81 of the reinforcing member 8 at a position closer to the first end 86 side. On the side separated from the first end 86 with respect to the hole 810 farthest from the first end 86, an insertion hole 811 for the bolt S' is formed, and on the back surface of the indoor side surface portion 81, a nut 88 is fixed by welding at a position corresponding to the back surface of the insertion hole 811.

[0095] Of the three bolts S for fixing the first plate 160 of the hinge 16 to the indoor side finding portion 42 of the vertical frame 4, the two lower bolts S are fastened to the pop nuts provided on the back surface of the indoor side surface portion 81 of the reinforcing member 8. Of the two lower bolts S of the three bolts S for fixing the first plate 160 of the hinge 16 to the indoor side surface portion 40' of the inner vertical frame 4', the bolt S' (see FIG. 6) on the side far from the end of Section 1 is fastened to the nut 88 provided on the back surface of the indoor side surface portion 81 of the reinforcing member 8.

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

[0097] In the present embodiment, in the hinge 16 that also serves as a roller bracket, one bolt S' located on the side farthest from the end of Section 1 among the 12 bolts S that fix the surface portion 163 of the first plate 160, which is the fixed portion of the roller bracket, and the surface portion 165 of the lower second plate 161 to the indoor side surface portion of Section 1, is fastened to a nut 88 welded to the back surface of the indoor side surface portion 81 of the reinforcing member 8, and the remaining 11 bolts S are fastened to pop nuts.

[0098] [O]Side edge shape of the reinforcing portion formed on the frame of the section In the present embodiment, the reinforcing portion 6 protruding from the indoor side surface portion 32 of the lower frame 3 of Section 1 and the reinforcing portion 6' protruding from the indoor side surface portion 22 of the upper frame 2 of the top section 1' are both formed by notching both end portions from a state where they are integrally formed with substantially the same width as the indoor side surface portions of the lower frame 3 to the upper frame 2. The both end portions in the width direction of the reinforcing portions 6 and 6' do not reach the both end portions of the lower frame 3 and the upper frame 2, and the indoor side surface portions 32 of the lower frame 3 and 22 of the upper frame 2 are provided with both side portions 320 and 220 that do not have the reinforcing portions 6 and 6'. That is, the side edges 600 and 600' at both ends in the width direction of the reinforcing portions 6 and 6' and the portions 320' (notched flush with the indoor side surface portion 32) of the both side portions 320 and 220 that extend horizontally from the base ends of the side edges 600 and 600' are notched portions. In the notched portion, the base end side portions of the side edges 600 and 600' of the reinforcing portions 6 and 6' are curved surfaces in plan view, and the corners of the side edges 600 and 600' and the both side portions 320 and 220 are curved shapes in plan view. In the present embodiment, since the shapes in plan view of the side edge 600 of the reinforcing portion 6 and the side edge 600' of the reinforcing portion 6' are the same, hereinafter, the both side portions 320 of the indoor side surface portion of the lower frame 3 of Section 1 and the side edge 600 of the reinforcing portion 6 will be described.

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

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

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

[0102] [P]Locking mechanism for the door body of the overhead door One of the intermediate sections 1 in the intermediate section 1 is provided with a locking mechanism. The locking mechanism will be described with reference to FIGS. 44 to 48. The locking mechanism includes a latch 130 that can protrude from the width direction end of the intermediate section 1, a latch hook 131 located on the guide rail G, and an operation portion 132 that moves the latch 130 between a locked position and an unlocked position. The latch 130 is rotatably provided at both ends in the width direction of the indoor side portion of the intermediate section 1, and in a plan view, it can rotate between an unlocked position located inside the width direction end of the intermediate section 1 and a locked position protruding outward from the width direction end of the intermediate section 1. When the opening is fully closed, by setting the latch 130 to the locked position, the upper end of the latch 130 approaches the lower end of the latch hook 131 from below.

[0103] The middle frame 5 is arranged at the center in the width direction of the intermediate section 1 provided with the locking mechanism, and the operation portion 132 is provided on the surface portion 50 of the middle frame 5. The operation portion 132 and the left and right latches 130 are connected by a wire 133. When the operation portion 132 is in the first position, the latch 130 is in the locked position. In conjunction with the rotation operation of the operation portion 132 from the first position to the second position, the latch 130 rotates from the locked position to the unlocked position via the wire 133.

[0104] The latch 130 according to this embodiment is fixed to the indoor side surface portion 42 of the vertical frame 4 with bolts via the mounting plate 134. In the intermediate section 1 to which the locking mechanism is attached, a reinforcing plate 420 is fixed to the back surface of the indoor side surface portion 42 of the vertical frame 4 where the mounting plate 134 is fixed by a fastening member (for example, a blind rivet) over the height direction. Bent pieces 421 are integrally formed at the width direction ends of the reinforcing plate 420. As shown in FIG. 48, welding nuts 422 are provided at predetermined positions on the back surface of the reinforcing plate 420. In this embodiment, four welding nuts 422 are positioned corresponding to the bolts for fixing the mounting plate 134, one welding nut 422 is positioned corresponding to the bolt S' (see FIG. 47) below the second plate 161 of the hinge 16 in the upper part of the indoor side surface portion 42, and one welding nut 422 is positioned corresponding to the bolt S' (see FIG. 47) above the first plate 161 of the hinge 16 in the lower part of the indoor side surface portion 42. The upper and lower ends of the reinforcing plate 420 do not reach the upper and lower ends of the indoor side surface portion 42 of the vertical frame 4. Two holes 423 are formed at the upper end portion of the reinforcing plate 420 corresponding to the two bolts S above the second plate 161 of the hinge 16, and two holes 424 are formed at the lower end portion of the reinforcing plate 420 corresponding to the two bolts S below 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 reinforcing portion protruding on the indoor side surface portion of the lower frame In order to improve the strength of Section 1 and the door body D, a reinforcing portion 6 was formed protruding from the indoor side surface portion 32 of the lower frame 3. The reinforcing portion 6 has a hollow structure, and has a shape such that the height dimension increases as it separates from the indoor side surface portion 32 toward the indoor side. This shape is an advantageous shape from the viewpoint of the mass-to-strength ratio, and also improves the shape stability as an aluminum extrusion profile. The reinforcing portion 6 reduces the increase in weight due to its hollow structure, increases the cross-sectional area of the tip portion on the indoor side, and further thickens the wall thickness of the tip portion (tip vertical surface 66) compared to the wall thickness of other portions, so that the strength can be effectively ensured with respect to the amount of material used. Furthermore, the surface of the reinforcing portion 6 consists of an inclined surface, a horizontal surface, and a vertical surface, and there is no portion like a corner, so dust and dirt do not accumulate, cleaning is easy, and maintainability is also good. in By making the base end side portion (first portion 6A) of the reinforcing portion 6 have a hollow structure (when it is a plate-like portion, it cannot be thickened in terms of molding), the strength of the base end side portion of the reinforcing portion 6 can be ensured.

[0106] [Q-2] Curved shape of the base end side of the side edge of the reinforcing portion protruding from the frame A reinforcing portion 6 is provided protruding from the indoor side surface portion 32 of the lower frame 3 of Section 1. However, both end portions in the width direction of the reinforcing portion 6 do not reach both end portions in the width direction of the lower frame 3, and a mounting space for the roller bracket 17 is secured. This reinforcing portion 6 is formed by cutting out both end portions from a state where it is integrally molded with substantially the same width as the indoor side surface portion 32 of the lower frame 3. The indoor side surface portion 32 has both side portions 320 that do not include the reinforcing portion 6. The side edges 600 at both ends in the width direction of the reinforcing portion 6 and the portions of both side portions 320 extending horizontally from the base ends of the side edges 600 are cutout portions. Stress concentration occurs in this cutout portion, which may prevent the strength improvement of Section 1. In this embodiment, at the cutout portion, the corner portion (a portion where stress is likely to concentrate, for example, when cut out at a right angle, the stress concentration is large) between the base end side portion (second portion 602) of the side edge 600 of the reinforcing portion 6 and the portion of both side portions 320 is made into a curved shape in plan view, thereby improving the strength of Section 1. Also, the weight increase due to increasing the R of the curved portion is limited.

[0107] The reinforcing part 6' protruding from the indoor side surface part 22 of the upper frame 2 of the top section 1' is also formed by notching both end parts from a state where it is integrally molded with substantially the same width as the indoor side surface part 22 of the upper frame 2, similar to the reinforcing part 6 protruding from the indoor side surface part 32 of the lower frame 3. The indoor side surface part 22 has both side parts 220 without the reinforcing part 6'. The side edges 600' at both ends in the width direction of the reinforcing part 6' and the parts of both side parts 220 extending horizontally from the base ends of the side edges 600' are notched parts. In this embodiment, at the notched part, by making the corner part (a part where stress is likely to concentrate, for example, when notched at a right angle, the stress concentration is large) between the base end side part (second part 602') of the side edge 600' of the reinforcing part 6' and the part of both side parts 220 into a curved shape in plan view, the strength of the top section 1' is improved. Also, the weight increase due to increasing the R of the curved part is limited.

[0108] [Q-3] Attachment that can be attached to the tip part of the reinforcing part protruding from the indoor side surface part of the lower frame In this embodiment, in order to improve the wind pressure resistance strength of the section 1 of the overhead door, the extension dimension (reinforcing part 6) of the lower frame 3 was increased to the maximum size that can be manufactured. However, depending on the site, there is a possibility that the required strength may not be satisfied. For the purpose of improving strength, if the plate thickness of the lower frame 3 including the reinforcing part 6 is increased, the design range will be reduced due to the weight increase, and problems may occur in terms of product cost. An attachment 7 that can be attached to the tip part of the reinforcing part 6 protruding from the indoor side surface part 32 of the lower frame 3 was prepared. By attaching the attachment 7 to the tip part, the tip side of the reinforcing part 6 can be extended so as to be separated from the indoor side surface part 32. The method of attaching the attachment 7 is superior to the method of increasing the plate thickness in terms of the mass-to-strength ratio. Therefore, by using the attachment 7, it is possible to minimize the weight increase and improve the strength of the section 1. By preparing a plurality of types of attachments 7 with different dimensions and shapes, it is possible to select different attachments according to the strength required at the site and respond accordingly, improving the expandability of the section 1.

[0109] By making the attachment 7 a long member having a substantially U-shaped cross-section view from the front portion 70, the upper surface portion 71, and the lower surface portion 72, the attachment 7 can be easily attached to the tip portion of the reinforcing portion 6 so as to sandwich the tip portion. Further, by providing positioning pieces 73 and 74 on the lower surface of the upper surface portion 71 and the upper surface of the lower surface portion 72 of the attachment 7, the attachment workability is improved. In addition, the attachment 7 having a U-shaped cross-section view can follow the dimensional accuracy and deflection of the lower frame 3.

[0110] [Q-4] Connection structure between the lower part of the middle frame and the lower frame When fixing the lower part 501 of the middle frame 5 to the hollow lower frame 3, for example, blind rivets are used. As described above, in the present embodiment, in order to improve the strength of Section 1, a hollow reinforcing portion 6 is projected inwardly of the room in the width direction of the section on the indoor side surface portion 32 of the lower frame 3. The reinforcing portion 6 includes an upper inclined surface 61 that extends obliquely upward toward the indoor side, and the height dimension gradually increases in a direction away from the indoor side surface portion. This shape of the reinforcing portion 6 is an advantageous shape from the viewpoint of the mass-to-strength ratio. However, since the height of the indoor side surface portion 32 of the lower frame 3 is lower than the tip portion of the reinforcing portion 6, it is difficult to perform hole processing from the indoor side using ordinary equipment (hole processing on the indoor side surface portion 32 of the lower frame 3 for attaching rivets).

[0111] In this embodiment, by extending the indoor side surface portion 32 upward on the upper surface portion 30 of the lower frame 3 to form a rising piece (composed of a vertical side 35 and a horizontal piece 36), it becomes possible to set the fastening portion of the fastening member (for example, a branded rivet) above the upper surface portion 32 of the lower frame 3, and it becomes possible to easily perform hole processing on the vertical piece 35 of the rising piece. This hole processing can be performed not only from the indoor side but also from the outdoor side. Forming the rising piece limits the increase in weight compared to the case of increasing the overall height dimension of the lower frame 3. The lower part 501 of the middle frame 5 is in a state where the upper side abuts against the vertical piece 35 of the rising piece and the lower side abuts against the indoor side surface portion 32 of the lower frame 3, and the upper side (a position farther from the lower end of the middle frame 5) serves as the fastening portion. Therefore, the strength is improved compared to the case of fastening at the lower side (a position closer to the lower end of the middle frame 5). The rising piece according to this embodiment has a horizontal piece 36 integrally formed at the upper end, and the lower ends of the first side surface portion 51 and the second side surface portion 52, which are the prospective side surface portions of the middle frame 5 on the left and right, are close to or in contact with the horizontal piece 36. When the section 1 is deformed, the horizontal piece 36 of the rising piece abuts against and supports the lower ends of the first side surface portion 51 and the second side surface portion 52 of the middle frame 5.

[0112] [Q-5]Reinforcing materials incorporated into the hollow part of the lower frame of the section, and reinforcing materials incorporated into the hollow part of the upper frame of the top panel A reinforcing portion 6 protrudes from the indoor side surface portion 32 of the lower frame 3 of the section 1. However, both end portions in the width direction of the reinforcing portion 6 do not reach both end portions in the width direction of the lower frame 3, and a mounting space for the roller bracket 17 is secured. This reinforcing portion 6 is formed by notching both end portions from a state of being integrally formed with substantially the same width as the indoor side surface portion 32 of the lower frame 3. The indoor side surface portion 32 has both side portions 320 that do not include the reinforcing portion 6. The side edges 600 at both ends in the width direction of the reinforcing portion 6 and the portions of the both side portions 320 that extend horizontally from the base ends of the side edges 600 are notched portions. Stress concentration may occur in these notched portions, which may prevent the strength of the section 1 from being improved.

[0113] In the hollow portion of the lower frame 3, at least the reinforcing member 8 is incorporated across the inner surfaces of both side portions 320, and by setting the length of the reinforcing member 8 such that the second end 87 of the reinforcing member 8 extends beyond the corners of the side edges 600 of both side portions 320 and the reinforcing portion 6, the strength of Section 1 is improved. In the present embodiment, by incorporating the reinforcing members 8 at both ends in the length direction of the hollow portion of the lower frame 3, while minimizing the weight increase due to the addition of the reinforcing members 8, the strength of Section 1 is improved. The reinforcing member 8 incorporated in the hollow portion of the lower frame 3 is not of a hollow type but has an opening extending in the length direction. Therefore, the reinforcing member 8 has a shape that easily deforms following the deformation and torsion of the lower frame 3 when it receives wind pressure, and it is possible to suppress stress concentration on the member to be reinforced (lower frame 3) generated by the reinforcing member 8.

[0114] The reinforcing portion 6' protruding from the indoor side surface portion 22 of the upper frame 2 of the top section 1' is also formed by notching both end portions from a state where it is integrally molded with substantially the same width as the indoor side surface portion 22 of the upper frame 2, similar to the reinforcing portion 6 protruding from the indoor side surface portion 32 of the lower frame 3. The indoor side surface portion 22 has both side portions 220 without the reinforcing portion 6'. The side edges 600' at both ends in the width direction 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 notched portions, and stress concentration may occur in these notched portions, which may prevent the strength improvement of the top section 1'.

[0115] In the hollow portion of the upper frame 2, at least the reinforcing member 9 is incorporated across the inner surfaces of both side portions 220, and by setting the length of the reinforcing member 9 such that the second end 96 of the reinforcing member 9 extends beyond the corners of the side edges 600' of both side portions 220 and the reinforcing portion 6', the strength of the top section 1' is improved. In the present embodiment, by incorporating the reinforcing members 9 at both ends in the length direction of the hollow portion of the upper frame 2, while minimizing the weight increase due to the addition of the reinforcing members 9, the strength of the top section 1' is improved. The reinforcing member 9 incorporated in the hollow portion of the upper frame 2 is not of a hollow type but has an opening extending in the length direction. Therefore, the reinforcing member 9 has a shape that easily deforms following the deformation of the upper frame 2, and it is possible to suppress stress concentration on the member to be reinforced (upper frame 2) generated by the reinforcing member 9.

[0116] [Q-6] Mounting Structure of Roller Bracket Using Welding Nut The roller bracket 17 that supports the roller shaft 110 of the guide roller 11 provided at both ends in the width direction of the section 1 of the overhead door is fixed with bolts to the upper and lower parts of the indoor side surface of the section 1. However, since the upper and lower parts of the indoor side surface of the section 1 are fixed to the hollow upper frame 2 and lower frame 3, it is common to fasten the bolts for fixing the roller bracket 17 to pop nuts. When a large wind pressure acts on the section 1, as the section 1 deforms, a force acts such that the roller shaft 110 tilts with the guide roller 11 in contact with the inner surface of the guide rail G. This force acts on the fixed part between the roller bracket 17 and the indoor side surface of the section 1. At this time, the strength of the mounting part of the roller bracket depends on the pulling strength of the pop nut, but the pulling strength of the pop nut may not always be sufficient (see the right side of the upper figure in Fig. 42 and the right side of the upper figure in Fig. 43).

[0117] By replacing at least a part of the pop nuts (the part where a larger force acts, for example, including at least the pop nut located on the side farthest from the widthwise end of the section 1) with welding nuts 88, 97 welded to the back plate, the strength of the mounting part of the roller bracket is improved (see the right side of the lower figure in Fig. 42 and the right side of the lower figure in Fig. 43). The back plate provided with the welding nuts 88, 97 can be used in common by the indoor side surfaces 81, 91 of the reinforcing members 8, 9A. In the mode where the reinforcing members 8, 9A are provided in the hollow parts of the lower frame 3 and the upper frame 2, the welding nuts 88, 97 can be adopted without increasing the number of parts (without preparing a special back plate).

[0118] [Q-7] Middle Frame Densely Arranged Near the Center in the Width Direction of the Section When the door body D of the overhead door receives a high wind pressure, the central part in the width direction of each section 1 may bend, or a force may act such that the central part in the width direction of each section 1 expands vertically. There is a risk that the members (such as the upper frame 2, the lower frame 3, the main body 10, etc.) constituting each section 1 may be deformed or the fastening parts may become loose.

[0119] In this embodiment, in section 1 including a main body 10, left and right vertical frames 4, inner vertical frames 4', an upper frame 2, a lower frame 3, and a plurality of middle frames 5 provided so as to span the upper frame 3 and the lower frame 3, the middle frames 5 are densely arranged on the center side in the width direction (the portion where deflection is large when receiving wind pressure) compared to both end sides in the width direction of each section 1, thereby suppressing the vertical opening of section 1 and preventing as much as possible the members (such as the upper frame 2, the lower frame 3, and the main body 10) constituting each section 1 from deforming or the fastening parts from coming off. Depending on the material of the main body 10 of section 1 and the strength required for section 1, an appropriate number of middle frames 5 can be incorporated as needed, minimizing the weight increase associated with the addition of the middle frames 5 and enabling improvement of the strength of the section.

[0120] [Q-8] Vertical Frame of Intermediate Section Equipped with Locking Device By providing a reinforcing plate 420 on the back surface of the indoor-side finding part 42 of the vertical frame 4 of the intermediate section 1 equipped with a locking device, the strength of the intermediate section 1 can be improved. By integrally forming bent pieces (ribs) 421 at both ends in the width direction of the reinforcing plate 420, the strength of the reinforcing plate 420 is improved. Further, nuts 422 are welded to predetermined positions on the back surface of the reinforcing plate 420, and bolts for fixing the mounting plate 134 of the latch 130 to the indoor-side finding part 42 of the vertical frame 4 are fastened to the nuts 422. The strength of the fastening part when the bolt is fastened to the welded nut 422 is improved compared to the strength of the fastening part when the bolt is fastened to a pop nut. Also, by replacing one of the pop nuts to which a plurality of bolts for fixing the hinge 16 to the indoor-side finding part 42 of the vertical frame 4 are fastened with the welded nut 422 provided on the reinforcing plate 420, the stress acting on the fastening part of the hinge 16 can be dispersed.

Explanation of Reference Numerals

[0121] 1 Section 1' Top Section 2 Upper Frame 3 Lower Frame 4 Vertical Frame 4' Inner Vertical Frame 5 Middle Frame 6 Reinforcing Portion 6' Reinforcement part 7 Attachment 8 Reinforcing material 9 Reinforcing material 9A Reinforcing material 9B Reinforcing material 10 Main body 11 Guide roller 110 Roller shaft 16 Hinge 17 Roller bracket

Claims

1. In a door body of an overhead door formed by connecting a plurality of sections in the height direction, each section includes a main body, left and right vertical frames, an upper end portion, a lower end portion, and a plurality of middle frames provided so as to span between the upper end portion and the lower end portion. The middle frames are densely arranged on the central side in the width direction compared to both end sides in the width direction of each section. The plurality of middle frames are arranged at equal intervals in the width direction of the section, and include a plurality of first middle frames to which hinges for connecting adjacent sections above and below are attached. A plurality of second middle frames that are arranged between the plurality of first middle frames located at the central portion in the width direction and to which no hinges are attached. It consists of a door body of an overhead door.

2. In each section, the number of the second middle frames is two or three. The door body of the overhead door according to Claim 1.

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