Door body corner structure

Abstract

To provide a connection structure with increased strength when screwing a corner part X between the lower edge of the door leading end side of a vertical stile member 5 that is wide in the right and left direction and the edge of a lower stile member 7 using a connection fixture 13.SOLUTION: Into a corner part X with a horizontal stile member fitted into an L-shaped notch 5d formed by first and second notched edges 5h and 5i at the bottom edge of a vertical stile member 5, a connection fixture 13 is assembled which has a first side 13a that contacts an inner member of the vertical stile member 5, a second side 13b that extends along the first notched side 5h, and a third side 13c placed between the second notched side 5i and the horizontal stile member 7; the first side 13a is fixed to the vertical stile member with screws 14 screwed in from the inside of a door body; and the third side 13c is fixed to the horizontal stile member together with the vertical stile member 5 via the screws 14 that screw in from the outside of the vertical stile member 5.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a technical field of a corner structure of a door body, which is provided for opening and closing an entranceway, and which is formed by butting together the end edges of vertical and horizontal frame members. [Background technology]

[0002] Generally, when assembling a door body, the edges of the vertical and horizontal frames that make up the four perimeters of the door body are butted together to form a corner. In this case, it is known to assemble the door so that the vertical frames extend to the top and bottom edges of the door body while the horizontal frames are butted against the inner edges of the vertical frames in the left and right directions (vertical edge specification), or conversely, the horizontal frames extend to the left and right edges of the door body and are butted against the horizontal frames (horizontal edge specification), and the frames are fixed together with screws at the butted corners. In such door bodies, for example, when a vertical opening specification is used, a wide vertical frame may be used for reasons such as the need to install a locking device inside or design. In such cases, the screws at the corners must be screwed into the horizontal frame while penetrating the wide vertical frame, requiring long screws. This not only makes it difficult to align the screws when screwing them from the vertical frame to the horizontal frame, making it troublesome and complicated, but also creates the problem that the strength of the screws is insufficient because they must penetrate the vertical frame. For example, it has been proposed to cut out the end edge of a vertical frame into an inverted L-shape, butt-fit the end edge of a horizontal frame into the cut-out, and then fix the assembled part with a screw, allowing the connection to be made with a short screw, thereby making it easier to align the screws (see, for example, Patent Document 1). Furthermore, when fastening the vertical and horizontal frames at the corner of such a door body together with screws, it has been proposed to fit the edge of the horizontal frame into the inverted L-shaped cut-out edge of the vertical frame, and then fasten them with screws using an L-shaped connecting fitting, which not only makes it possible to connect them with short screws but also increases the strength of the corner (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-27553 A [Patent Document 2] Jpn. Jpn. Published No. 58-56310 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, hanger type (top-hung) door bodies that have hanger rollers attached to the upper edge have come into widespread use, eliminating the need for floor rails. However, with this type of door body, the corner area of ​​the lower edge on the door edge is left loose and has no protection, so there is a demand for increased strength, especially in cases where the vertical frame on the door edge side is made wider, as mentioned above. When attempting to employ the above-mentioned conventional corner structure in a corner portion that requires such strength, the former structure does not have sufficient strength because the screws are only screwed in from the outside of the vertical frame. In contrast, the latter structure has screws that are screwed in from both the vertical and horizontal directions through the connecting metal fittings, so it can be said to have a stronger connecting structure than the former structure, but this structure has problems such as difficulty in securing the required strength when fixing wide vertical frames with screws as mentioned above, and inability to meet the demand for even stronger strength, which are the issues that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention has been created in view of the above-mentioned circumstances and with the objective of solving these problems. The invention of claim 1 provides a door body in which an L-shaped cutout is formed on the edge of at least one of the vertical and horizontal frame members by a first cutout side portion extending from the inside edge of the door body of the one frame member to an intermediate portion not reaching the outside edge of the one frame member, and a second cutout side portion bending from the tip of the first cutout side portion to reach the edge of one of the frame members, and a corner portion of the door body is formed by fitting the edge portion of the other frame member into the cutout portion, and the corner portion is fixed with a screw. In this door body, at least one of the corner portions is connected to the edge of the door body by using a connecting metal fitting. When fixed with screws, at least one of the connecting fittings has a first edge portion that abuts the door body inner member of one of the frame members, a second edge portion that is bent from the first edge portion and arranged along the first cutout edge portion, and a third edge portion that is bent from the second edge portion and arranged in a sandwiched state between the second cutout edge portion and the end edge of the other frame member, wherein the first edge portion is fixed to the door body inner member of one of the frame members via a screw screwed in from the inside of the door body, and the third edge portion is fixed to the one frame member side member and the other frame member side member via a screw screwed in from the outside of the end edge of one of the frame members.This is a corner structure in a door body. The invention of claim 2 is such that the edge portion of the other frame has an L-shaped cutout formed by the other first cutout edge portion which extends from the inner edge portion of the door body of the other frame to an intermediate portion not reaching the outer edge portion, and the other second cutout edge portion which bends from the tip of the other first cutout edge portion to reach the edge of the other frame, and the corner portion of the door body is formed by fitting the cutout portion of the other frame into the cutout portion of one frame, and the first edge portion of the connecting fitting is formed by fitting the member on the inner edge side of one frame to the first first cutout portion of the other frame. the first edge portion is arranged along the first cutout edge portion of one side and the second cutout edge portion of the other side, and the third edge portion is arranged in a sandwiched state between the second cutout edge portion of one side and the edge of the other frame member, and is fixed to the one frame member side member together with the one frame member via a screw screwed in from the outside of the edge portion of one frame member.This is a corner structure in a door body as described in claim 1, characterized in that the first edge portion is arranged in a sandwiched state between the first cutout edge portion of one side and the second cutout edge portion of the other side, and the third edge portion is arranged in a sandwiched state between the second cutout edge portion of one side and the edge of the other frame member, and is fixed to the other frame member side member together with the one frame member via a screw screwed in from the outside of the edge portion of one frame member. The invention of claim 3 is a corner structure in a door body described in claim 1 or 2, characterized in that the connecting fitting has a fourth side portion bent from the third side portion and abutting the door body outer member of the other frame, and the fourth side portion is fixed to the other frame side member via a screw that is screwed in from the outside of the door body. The invention of claim 4 provides a corner structure in a door body according to any one of claims 1 to 3, characterized in that one frame is a vertical frame and the other frame is a horizontal frame. The invention of claim 5 provides a corner structure in a door body according to any one of claims 1 to 3, characterized in that one frame is a horizontal frame and the other frame is a vertical frame. The invention of claim 6 is a corner structure in a door body described in any one of claims 1 to 5, characterized in that a closing plate for closing the edge on the side where the second cutout edge of one of the frame members is formed is fixed with a screw. Effect of the Invention

[0006] According to the invention of claim 1, a corner portion formed by fitting an end edge of one frame member into a cutout portion formed in the end edge of the other frame member is fixed with screws using a connecting fitting, and the connecting fitting has a first side portion that abuts the inner member of the door body of one frame member, a second side portion that is arranged along the first cutout edge portion, and a third side portion that is sandwiched between the second cutout edge portion and the end edge of the other frame member. The first side portion is fixed to the one frame member side member by a screw screwed in from the inside of the door body, and the third side portion is fixed to the one frame member side member and the other frame member by a screw screwed in from the outside of the end edge of the one frame member. As a result, the one frame member is fixed to the connecting fitting by screws screwed in from both the inside and outside of the door body, providing a strong screw fixation, and the necessary strength can be ensured even if one of the frame members is wide. By making use of the invention as defined in claim 2, a notch can be formed in the end edge of the other frame material, and even at the corner portion where the notches are fitted together, the above-mentioned strong screw fixing can be achieved by using connecting fittings. By adopting the invention of claim 3, the fourth side portion of the connecting fitting which abuts the outer member of the other frame is fixed to the other frame side member via a screw which is screwed in from the outside of the door body. As a result, the other frame is fixed to the connecting fitting from the outside of the door body in the vertical and horizontal directions, thereby further increasing its strength and making it possible to increase the strength of the corner portion. By adopting the invention as defined in claim 4, the present invention can be embodied in a vertically extending door frame that extends to the lower edge of the door body. By adopting the invention as defined in claim 5, the present invention can be implemented in a door having a lateral extension in which the horizontal frame material extends to the left and right edges of the door body. By adopting the invention of claim 6, the edge on the side where the second cutout edge portion is formed can be sealed with a sealing material, which not only prevents dirt and other objects from entering the frame material, but also protects the edge and other components when they come into contact (abut) with the edge. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] 1A and 1B are a longitudinal sectional side view and a transverse sectional view of a portion of a door body. [Diagram 3] FIG. [Figure 4] 13(A), (B), and (C) are longitudinal front views of a corner portion secured with screws using an L-shaped connecting fitting. [Diagram 5] 13A, 13B, and 13C are exploded perspective views of a corner portion secured with screws using an L-shaped connecting fitting. [Figure 6] 1A and 1B are a longitudinal sectional front view and a sectional perspective view of a corner portion secured with a screw using a connecting fitting according to the present invention. [Figure 7] 1 is an exploded perspective view of a corner portion secured with a screw using a connecting fitting according to the present invention; [Figure 8] 1A, 1B, 1C and 1D are a front view, a side view, a bottom view and a perspective view of a connecting fitting in accordance with the present invention. [Figure 9] 1A, 1B, and 1C are a front view, a side view, and a plan view of the stopper member of the door-end portion of the hanger rail. [Figure 10] 13(A), (B), and (C) are schematic front views of a corner portion of a door body showing second, third, and fourth embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a door body (door body, gate body), which is a hanger type door body with a hanger roller 2 provided at the upper edge thereof, and the hanger roller 2 is guided by a hanger rail 3 disposed at the upper edge of an opening (entrance / exit portion) E to roll and move left and right to open and close, all of which is conventional. In the drawings, reference numeral T denotes a door pocket.

[0009] The door body 1 is a hollow section made of extruded aluminum, and left and right vertical frames 4, 5 on the end and front sides and upper and lower horizontal frames 6, 7 are assembled in a rectangular shape to form a frame all around. In this case, the front side vertical frame 5 is wider in the left-right direction than the end side vertical frame 4 to ensure space for installing the locking device main body 8, and the present invention is embodied in the lower corner part X, which is the free end where the edges of the front side vertical frame 5 and the lower horizontal frame 7 are butted together.

[0010] The trailing edge vertical frame 4 is formed with a main body side portion 4a having a rectangular tubular shape elongated in the front-rear direction, front and rear inner side portions 4b extending from the inner edge portion of the main body side portion 4a in the left-right direction toward the inside (inner side in the left-right direction) of the door body 1 and having a concave groove shape to support the panel body (flat plate body made of material such as glass plate, synthetic resin plate, metal plate, etc.) 9 from both the front and rear sides in a sandwiched manner, and an outer side portion 4c extending from the outer edge portion of the main body side portion 4a in the left-right direction toward the outside (outer side in the left-right direction) of the door body 1 to attach and lock a cushioning material 10 having rubber elasticity. Incidentally, the main body side portion 4a of the trailing edge vertical frame 4 in this embodiment is a rectangular tubular shape that is not "R" shaped but "J" shaped, which increases its strength.

[0011] The vertical frame 5 on the door end side is formed with a square cylindrical main body edge portion 5a which is wider in the left-right direction to accommodate the locking device main body 8 in the vertical middle portion, front and rear inner edge portions 5b which extend from the inner left-right edge portion of the main body edge portion 5a toward the inside of the door body 1 (inner left-right direction) and support the panel body 9 from both the front and rear in a clamping manner, and an outer edge portion 5c which extends from the outer left-right edge portion of the main body edge portion 5a toward the outside of the door body 1 (outer left-right direction) and is used to attach and engage a cushioning material 10 similar to that described above. However, the outer edge portion 5c is designed to be wider in the left-right direction than the outer edge portion 4c of the vertical frame 4 on the door end side so that the rod 8a of the locking device 8 can be fitted in freely and move up and down. Incidentally, in this embodiment, the door-end vertical frame 5 has a handle portion 5f extending from the inner end surface portion 5e in the left-right direction of the main body edge portion 5a toward both the front and rear sides of the main body edge portion 5a to serve as a handle when opening and closing the door body 1.

[0012] In contrast, the upper horizontal frame member 6 is formed with a main body edge portion 6a which is shaped like a rectangular tube and is wider in the front-to-rear direction, front and rear inner edge portions 6b which extend from the inner vertical edge portion of the main body edge portion 6a toward the inside (lower side) of the door body 1 and support the panel body 9 by clamping it from both the front and rear, an upper edge portion 6c which extends upward from the upper edge portion of the main body edge portion 6a and into which the roller support portion 2a to which the hanger roller 2 is attached and supported is attached, and a lower edge portion 6d which is the bottom edge of a U-shaped groove. Finally, the lower horizontal frame member 7 is formed with a main body side portion 7a having a rectangular cylindrical shape that is wider in the front-rear direction, an inner side portion 7b that extends from the inner edge portion of the main body side portion 7a in the vertical direction toward the inside (upper side) of the door body 1 to support the panel body 9 from one side in the front-rear direction, and a lower side portion 7c that extends downward from both front and rear ends of the lower edge portion of the main body side portion 7a and into which a vibration prevention body 11 provided on the floor surface F is fitted to prevent the door body 1 from vibrating. Incidentally, a locking groove 7e is formed in a portion of the lower horizontal frame member main body side portion 7a facing the inner side portion 7b to detachably support a pressing edge member 7d that supports the panel body 9 in a clamping manner together with the inner side portion 7b.

[0013] In forming the framework of the left and right vertical frame members 4, 5 and the upper and lower horizontal frame members 6, 7 configured in this manner, in this embodiment, L-shaped (inverted L-shaped) cutout portions 4d, 5d are formed in the upper and lower end edges of the left and right vertical frame members 4, 5, and the left and right end edges of the upper and lower horizontal frame members 6, 7 are fitted into the cutout portions 4d, 5d. However, it goes without saying that the present invention can also be implemented in a configuration in which cutout portions are formed in the left and right end edges of the upper and lower horizontal frame members 6, 7, and the upper and lower end edges of the left and right vertical frame members 4, 5 are fitted into the cutout portions. Incidentally, the cutout portions 4d, 5d formed on the upper and lower edges of the left and right vertical frame members 4, 5 are both formed in the same manner, so we will explain the cutout portion 5d formed on both the upper and lower edges of the vertical frame member 5 on the door end side in which the present invention is implemented, and will omit a detailed explanation of the cutout portion 4d formed on the upper and lower edges of the vertical frame member 4 on the door tail side.

[0014] The cutout portion 5d formed in the lower edge portion of the door-end side vertical frame member 5 is formed in an inverted L-shape having first and second cutout sides 5h, 5i. Specifically, the first cutout side 5h is cut out from the inner left-right edge of the inner side portion 5b (the inner left-right edge of the door-end side vertical frame member 5) 5e toward the outside in the left-right direction, and is cut out to an intermediate position that does not reach the outer left-right edge 5g of the door-end side vertical frame member 5, specifically to a position (just before the position) that leaves the outer left-right end surface portion 5l of the main body side portion 5a. In contrast, the second cutout edge 5i is cut out so as to extend to the lower edge 5k of the door-end vertical frame 5 (outer edge 5c) in a state in which it is bent downward, that is, outward in the vertical direction, from the tip (the midway position) of the first cutout edge 5h.

[0015] In this embodiment, all of the four corners X, Y of the frame formed by the left and right vertical frame members 4, 5 and the upper and lower horizontal frame members 6, 7 are fixed with screws using connecting fittings 12, 13, but the present invention is not limited to this, and it is sufficient that at least one of the corners X, Y is fixed with a screw using connecting fittings 12, 13 as will be described later, and furthermore, it is sufficient that at least one of the connecting fittings 12, 13 used in this case is a connecting fitting 13 embodying the present invention.

[0016] Next, we will first explain the assembly structure of the corner part Y at the upper end of the door leading side, which is formed by incorporating the upper edge of the vertical frame member 5 on the door leading side and the door leading edge of the upper horizontal frame member 6. However, since the assembly structures of the corner parts Y are the same for all three corner parts Y, including the upper and lower corner parts Y on the door trailing side, which are formed by incorporating the upper and lower end edges of the vertical frame member 4 on the door trailing side and the edges of the upper and lower horizontal frames 6, 7, we will only explain the assembly configuration of the upper corner part Y on the door leading side and will omit detailed explanations of the assembly structures of the other corner parts Y (see Figure 5).

[0017] The corner portion Y between the upper edge of the vertical frame 5 on the door end side and the edge of the upper horizontal frame 6 is fixed with a screw using a connecting fitting 12. The connecting fitting 12 is configured in an L shape (inverted L shape) with a first side portion 12a which is the upper side and a second side portion 12b on the lower side which is the vertical side. By fitting the first side portion 12a between the inner side portions 6b at the front and rear of the upper horizontal frame and abutting it against the bottom surface of the groove (upper surface of the groove) of the lower side portion 6d, the first side portion 12a is stacked (overlapped) from below against the lower side portion 6d of the main body side portion 6a. In this state, the first side portion 12a and the lower side edge portion (upper horizontal frame 6) 6d are fixed together via a screw 14 which is screwed in from below. In addition, various types of screws are used in carrying out this embodiment, but in the following description, the "screw 14" with the lead code "14" will be uniformly described as a general term for various types of screws used to screw components together, and individual screws will not be given different lead codes.

[0018] With the connecting fitting 12 fixed to the upper horizontal frame 6 with the screws 14 in this manner, the edge of the upper horizontal frame 6 is fitted into the upper cutout 5d of the end-of-door vertical frame 5, with the end-of-door edge of the upper horizontal frame 6 abutting the second cutout edge 5i and the lower edge of the lower edge 6b of the upper horizontal frame abutting the first cutout edge 5h. In this case, the second edge 12b of the connecting fitting 12 abuts against the bottom edge of the groove of the inner edge 5b of the end-of-door vertical frame, that is, the inner lateral surface of the inner lateral end surface 5e of the main body edge 5a. With the upper horizontal frame 6 fitted into the upper cutout 5d of the vertical frame 5 on the door-end side in this manner, the screw 14 screwed from the outside in the left-right direction into the outer left-right end face 5l of the main body edge 5a of the vertical frame on the door-end side is screwed into the screw pocket 6e provided on the upper edge 6c of the upper horizontal frame 6 to fix (fasten) it, and the screw 14 screwed from the inside in the left-right direction into the second edge 12b of the connecting fitting is screwed into the inner left-right end face 5e of the main body edge 5a of the vertical frame on the door-end side, thereby completing screw fixing using the connecting fitting 12 at the corner portion Y where the upper edge of the vertical frame 5 on the door-end side and the edge of the upper horizontal frame 6 are butted together.

[0019] Next, a structure in which the corner portion X, in which the end edge portion of the lower horizontal frame 7 is fitted into the lower cutout portion 5d of the door end vertical frame 5 in accordance with the present invention, is fixed with a screw using a connecting fitting 13 will be described. The connecting fitting 13 is composed of a first side portion 13a on the upper side which is a vertical side, a second side portion 13b extending outward in the left-right direction from the lower edge of the first side portion 13a, a third side portion 13c bent downward from the outer left-right end of the second side portion 13b, and a fourth side portion 13d bent inward in the left-right direction from the lower edge of the third side portion 13c. The connecting fitting 13 is arranged so that its first edge portion 13a is fitted into the door-end side vertical frame main body edge portion 5a and abuts against the left-right inner end surface portion 5e, its second edge portion 13b is arranged along the first notched edge portion 5h which is the lower edge of the main body edge portion 5a and abuts against the upper surface of the upper end surface portion 7h of the upper edge portion 7b of the lower vertical frame, its third edge portion 13c is arranged so as to be sandwiched between the left-right outer end surface portion 5l of the main body edge portion and the edge of the lower horizontal frame main body edge portion 7a, and its fourth edge portion 13d is assembled within the lower horizontal frame main body edge portion 7a and abuts against the upper surface of the lower end surface portion 7i of said main body edge portion 7a.

[0020] The first side 13a of the connecting fitting 13 thus assembled to the corner portion X is fixed to the left-right inner end surface 5e of the door-end vertical frame body side 5a by a screw 14 screwed in from the left-right inner side. Meanwhile, the third side 13c is fixed to the lower corner portion X of the door-end vertical frame 5 and the lower edge of the lower horizontal frame 7 by the connecting fitting 13, with the upper screw 14 penetrating the left-right outer end surface 5l of the body side and the third side 13c from the left-right outer side and screwing into the upper screw pocket 7f formed in the lower horizontal frame body side 7a, and the lower screw 14 penetrating the left-right outer end surface 5l of the body side from the left-right outer side and screwing into the lower screw pocket 7g formed in the lower edge 7c of the lower horizontal frame. Furthermore, the fourth side portion 13d is fixed to the lower end face portion 7i of the lower horizontal frame by a screw 14 that is screwed from below into the bottom of the groove of the lower side edge portion 7c of the lower horizontal frame, thereby further increasing the strength of the connection at the corner portion X.

[0021] Furthermore, in this embodiment, the following improvements are made. The lower edge portion where the cutout portion 5d of the vertical frame material 5 on the door end side is formed has the edge portion of the lower horizontal frame material 7 fitted in, leaving the lower edge of the outer edge portion 5c open, and a blocking plate 15 is provided to block this. The blocking plate 15 has an upright mounting edge portion 15a and is configured to be attached by fixing the mounting edge portion 15a to the left-right outer end face portion 5l of the vertical frame material main body portion 5a on the door end side by screws 14 that screw in from the outside, with the mounting edge portion 15a abutting the outside in the left-right direction. In this structure, the blocking plate 15 abuts against the lower edge 10a of the cushioning material 10 from below, thereby functioning to prevent the cushioning material 10 from slipping off the vertical frame material 5 on the door end side.

[0022] In addition, a stop member 16 is provided on the door-end edge of the hanger rail 3 to restrict the movement of the rod 8a, which moves upward and protrudes into the hanger rail 3 when the locking device main body 8 is operated to lock the door body 1, toward the door tail side. The stop member 16 comprises a pair of upper and lower stop plates 16a, 16b which are arranged to clamp the front and rear roller rolling surface portions 3a formed on the lower edge of the hanger rail 3 from above and below, and is fixed in a state in which the roller rolling surface portion 3a is clamped by screws 14 which screw into the stop plates 16a, 16b. However, in order to restrict inadvertent movement of the stop member 16 in the event of an excessive load being applied, for example by forcibly prying open the door body 1 when locking, the lower stop plate 16b is wider than the upper stop plate 16a, and this wide portion is fixed to the roller rolling surface portion 3a by the screws 14.

[0023] In the present embodiment configured as described above, the door body 1 which opens and closes the opening E is of the hanger roller type, and in this embodiment, the left and right vertical frame members 4, 5 are of the so-called vertical extension type, which extends to the lower edge of the door body 1. L-shaped cutout portions 4d, 5d are formed in the end edges of the vertical frame members 4, 5, and the end edges of the upper and lower horizontal frame members 6, 7 are fitted into the cutout portions 4d, 5d to form a frame. In this structure, the vertical frame member 5 on the door front side is wider in the left-right direction than the vertical frame member 4 on the door rear side in order to accommodate the lock device main body portion 8. Of the corner portions X and Y formed at the four corners of the door body 1, the corner portion X formed at the lower end on the door leading side is not in a protected state such as being close to the door pocket T or the hanger rail 3 as the other three corner portions Y are, but is a free end, and therefore requires assembly strength. Therefore, instead of the conventionally known L-shaped connecting metal fitting 12 as used for the other corner portions Y, a connecting metal fitting 13 embodying the present invention is used for this corner portion.

[0024] Specifically, the connecting fitting 13 includes a first side portion 13a that contacts the inner left-right end surface portion 5e of the door-end vertical frame member 5, which is the door body inner member, a second side portion 13b that is disposed along the first notched side portion 5h, and a third side portion 13c that is sandwiched between the second notched side portion 5i and the door-end side edge of the lower horizontal frame member 7. The first side portion 13a is fixed to the inner left-right end surface portion 5e of the door-end vertical frame member 5 via a screw 14 that is screwed in from the inside left-right of the door body 1, and the third side portion 13c is fixed to the door-end The side vertical frame 5 is fixed to the end edge of the lower horizontal frame 7 together with the outer left-right end face 5l, which is a member on the side of the front vertical frame 5, via screws 14 screwed in from the outside of the outer left-right edge 5g of the side vertical frame 5.As a result, the front vertical frame 5 is fixed to the connecting fitting 13 via screws 14 screwed into the inner and outer left-right end face parts of the door body 1 from two directions, providing a strong screw fixation, and the installation can be performed with the necessary strength even if the front vertical frame 5 is wide.

[0025] Furthermore, in this case, the connecting fitting 13 is further bent from the third side portion 13c and has a fourth side portion 13d that abuts against the lower end face portion 7i, which is the door body outer member of the lower horizontal frame member 7, and is fixed via a screw 14.As a result, the lower horizontal frame member 7 is fixed to the connecting fitting 13 from the outside in the vertical and horizontal directions relative to the door body 1, thereby further increasing its strength and increasing the strength of the corner portion X. Furthermore, since the open lower edge of the outer edge 5c of the vertical frame member on the door end side is closed with a closing plate 15, not only is it possible to prevent the intrusion of debris and the like through the open lower edge of the outer edge 5c of the vertical frame member on the door end side, but it is also possible to protect the lower edge as well as other components if they come into contact with the lower edge.

[0026] Of course, the present invention is not limited to the above-described embodiment, and can be applied to other corners Y as well as corner X at the bottom of the door end as necessary, so long as increased strength is required for the corners. The member on the frame side to which the connecting fitting 13 is connected does not have to be a member constituting the frame, but may be a separate member provided on the frame for reinforcement or the like, and such members are included in the "frame side member" of the present invention. In the above-mentioned embodiment, the connecting fitting 13 used in the present invention has a fourth side portion 13d, but this is not limited to this and it can also be implemented without the fourth side portion 13d as in the second embodiment of Figure 10(A), and furthermore, as in the third embodiment shown in the same figure (B), a notch 7j is formed in the end edge portion of the lower horizontal frame material 7, and the corner portion X in which the end edge portion of the door end type frame material 5 is fitted into the notch 7j is fixed with screws using the connecting fitting 13. Furthermore, as in the fourth embodiment shown in FIG. 10(C), the present invention can also be implemented by forming cutouts 5d, 7j at the end edges of both frame members 5, 7, respectively, and fitting the cutouts 5d, 7j into each other to form a corner portion X, which is fixed with screws using the connecting fittings 13. [Industrial Applicability]

[0027] The present invention can be used as a corner structure for a door body provided for opening and closing an entranceway, which is constructed by butting together the end edges of vertical and horizontal frame members. [Explanation of symbols]

[0028] 1 Door body 5 Door end vertical frame 5d Cutout 5h First cutout edge 5i Second cutout edge 7 Lower horizontal frame 13 Connecting hardware 13a First side 13b Second side 13c Third side 13d Fourth Side 14 Bis 15 Closing plate X corner part

Claims

1. At least one of the vertical and horizontal frame members has an L-shaped cutout formed at an edge thereof by a first cutout edge portion extending from the inner edge portion of the door body of the one frame member to a midway portion not reaching the outer edge portion, and a second cutout edge portion bending from the tip of the first cutout edge portion to reach the edge of the one frame member, In the door body, a corner portion of the door body is formed by fitting an end edge portion of the other frame material into the cutout portion, and the corner portion is fixed with a screw. When at least one of the corner portions is fixed with a screw using a connecting metal fitting, At least one of the connecting fittings is - a first side portion of one of the frame members that contacts the door body inner member; a second side portion bent from the first side portion and arranged along the first cutout side portion; a third side portion bent from the second side portion and sandwiched between the second cutout side portion and the other edge of the frame member; A corner structure in a door body, characterized in that a first side portion is fixed to an inner door body member of one of the frame members via a screw screwed from the inside of the door body, and a third side portion is fixed together with the one frame member side member to the other frame member side member via a screw screwed from the outside of an end edge portion of the one frame member.

2. The edge of the other frame member has an L-shaped cutout formed by a first cutout edge portion of the other frame member that extends from the inner edge portion of the door body of the other frame member to an intermediate portion not reaching the outer edge portion of the other frame member, and a second cutout edge portion that bends from the tip of the first cutout edge portion to reach the edge of the other frame member, The corner portion of the door body is constructed by fitting a cutout portion of one frame material into a cutout portion of the other frame material, The connecting fitting is The first side portion is sandwiched between the inner side portion of one of the frame members and the first cutout side portion of the other frame member, and is fixed to the frame member via a screw that is screwed in from the inside of the door body. The second side portion is disposed along the first cutout side portion on one side and the second cutout side portion on the other side, - A corner structure in a door body as described in claim 1, characterized in that the third side portion is sandwiched between one second cutout side portion and the end edge of the other frame member, and is fixed to the other frame member together with the one frame member side member via a screw screwed in from the outside of the end edge portion of the one frame member.

3. 3. The corner structure of a door body according to claim 1 or 2, characterized in that the connecting fitting has a fourth side portion bent from the third side portion and abutting the door body outer member of the other frame, and the fourth side portion is fixed to the other frame side member via a screw screwed in from the outside of the door body.

4. 4. The corner structure of a door body according to claim 1, wherein one of the frames is a vertical frame and the other frame is a horizontal frame.

5. 4. A corner structure for a door body according to claim 1, wherein one of the frames is a horizontal frame and the other frame is a vertical frame.

6. A corner structure in a door body as described in any one of claims 1 to 5, characterized in that a closing plate for closing the edge on the side where the second cutout edge is formed of one of the frame members is fixed with a screw.

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