Door frame structure

Abstract

To prevent the falling of a middle rib in the assembly of a door body frame using a bonding method.SOLUTION: A door body frame structure, which is assembled in a four-sided manner, made up of upper and lower frames 1, 2 and left and right vertical frames 3, includes an intermediate vertical frame 4, in which the upper and lower ends of the intermediate vertical frame 4 are engaged with the upper and lower frames 1, 2; the intermediate vertical frame 4 is made up of a main body 4' having a height that is allowed to be inserted between the upper and lower frames 1, 2, and upper and lower movable locking parts 7, 8 provided at both ends in the height direction of the main body 4' and taking a retreating posture in which the whole is positioned inside the main body and a protruding posture in which the whole protrudes from one end of the main body; the upper movable locking part 7 in the protruding posture is made up of a protruding part 7A that locks to the upper frame 1 and a base end part 7B that is positioned inside the main body 4' and is fixed to the main body 4'; and the lower movable locking part 8 in the protruding posture is made up of a protruding part 8A that locks to the lower frame 2 and a base end part 8B that is positioned inside the main body 4' and is fixed to the main body 4'.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a frame structure of a door body.

Background Art

[0002] In the case of a steel door typified by a heavy door provided at an entrance or the like of a building, a method of assembling a door frame by welding or using a structural joint tape or an adhesive is generally known. However, welding work requires skilled techniques, and there are also problems of thermal distortion and finishing, which is a time-consuming and laborious work for production. Therefore, a door assembly method using a structural joint tape or an adhesive that can improve workability and reduce finishing work has been widely adopted (Patent Document 1).

[0003] Generally, a door frame has a middle frame in addition to a four-sided frame, that is, a force frame. Currently, in the public building construction standard specification, only the construction methods using "welding" or "structural joint tape" are recognized for the assembly method of the surface plate and the middle frame. However, in the 2022 edition, a new construction method using an adhesive (hereinafter, "adhesive construction method") has been added. Therefore, a door structure suitable for mass production in the adhesive construction method is required.

[0004] Unlike the welding method and the structural joint tape method, the adhesive construction method requires a drying time until the adhesive hardens. During that time, the middle frame may fall down, and there is a risk that unevenness will occur in the adhesive quality between the middle frame and the surface material.

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to prevent the middle frame from falling down in the assembly of a door body frame using an adhesive construction method.

Means for Solving the Problems

[0006] The technical means employed in this invention are: The frame structure of the door body, which is assembled in a perimeter from upper and lower horizontal frames and left and right vertical frames, It has an intermediate frame parallel to one of the opposing frames, The longitudinal ends of the aforementioned intermediate frame are locked to the other opposing frame. The aforementioned intermediate frame is It consists of a main body having a height that allows it to be inserted between the other opposing frame, a retracted position provided on at least one side in the longitudinal direction of the main body where the entire body is located inside the main body, and a movable locking part that takes a protruding position protruding from one end of the main body. The movable locking portion in a protruding position consists of a protruding portion that locks onto one side of the other opposing frame, and a base end portion located inside the main body and fixed to the main body. This is the frame structure of the door body.

[0007] In one embodiment, the frame on one side of the other opposing frame comprises a face surface and a pair of facing edges, and includes a recess formed from the face surface and the pair of facing edges, the recess opening toward the other side of the other opposing frame, The protruding portion of the movable locking portion is locked into the recess. In one embodiment, the protruding portion is formed in a U-shape in cross-section from a front surface and a pair of front edges.

[0008] In one embodiment, the frame on one side of the other opposing frame comprises a face surface and a pair of face edges, the face surface being located on the side of the other opposing frame that is closer to the other frame. The protruding portion of the movable locking part is locked into the locking groove formed in the surface. In one embodiment, the protrusion is a plate.

[0009] In one embodiment, the movable locking portion comprises a first movable locking portion provided on one side in the longitudinal direction of the main body and a second movable locking portion provided on the other side in the longitudinal direction of the main body. The intermediate frame comprises the main body, the first movable locking portion, and the second movable locking portion.

[0010] In one embodiment, the intermediate frame comprises the main body, the movable locking portion provided on one side of the main body in the longitudinal direction, and the fixed locking portion formed on the other side of the main body in the longitudinal direction. The other frame of the opposing frame comprises a face surface and a pair of facing edges, the face surface being located on the side of the opposing frame of the other frame that is closer to one side of the frame. The aforementioned fixing locking portion has a shape that allows it to lock into the locking groove formed in the surface.

[0011] In one embodiment, the intermediate frame comprises the main body, the movable locking portion provided on one side of the main body in the longitudinal direction, and the fixed locking portion formed on the other side of the main body in the longitudinal direction. The other opposing frame has a recess formed from a face surface and a pair of facing edges, and the recess is open toward one side of the other opposing frame. The aforementioned fixing locking portion can be locked into the recess. In one embodiment, the fixing locking portion is formed in a U-shape in cross-section from a front surface and a pair of front edges.

[0012] In one embodiment, horizontal frames and vertical frames are assembled in a circumferential manner, with the visible edges of the horizontal frames and vertical frames being bonded to the surface material with adhesive, and the visible edges of the intermediate frame being bonded to the surface material with adhesive. [Effects of the Invention]

[0013] In this invention, when assembling a door body using an adhesive bonding method, the longitudinal ends of the intermediate frame are locked to the surrounding frame-shaped frame, thereby preventing the intermediate frame from collapsing and stabilizing the bonding quality in the adhesive bonding method. [Brief explanation of the drawing]

[0014] [Figure 1] It is an exploded perspective view of a door frame according to the first embodiment. [Figure 2] It is an exploded perspective view for explaining the incorporation of an intermediate vertical frame into the upper and lower frames of a door frame according to the first embodiment. [Figure 3] It is a perspective view for explaining the incorporation of an intermediate vertical frame into the upper and lower frames of a door frame according to the first embodiment. [Figure 4] It is a perspective view of a door according to the second embodiment. [Figure 5] It is an exploded perspective view of a door frame according to the second embodiment. [Figure 6] It is an exploded perspective view for explaining the incorporation of an intermediate vertical frame into the upper and lower frames of a door frame according to the second embodiment. [Figure 7] It is a perspective view for explaining the incorporation of an intermediate vertical frame into the lower frame of a door frame according to the second embodiment. [Figure 8] It is an exploded perspective view for explaining the incorporation of an intermediate vertical frame into the upper and lower frames of a door frame according to the third embodiment. [Figure 9] It is a perspective view for explaining the incorporation of an intermediate vertical frame into the upper frame of a door frame according to the third embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0015] [I] First Embodiment The first embodiment will be described while referring to FIGS. 1 to 3. [A] Basic Configuration of Frame of Door As shown in FIG. 1, the frame of the door, that is, the frame members, are combined in a circumferential shape by combining the upper frame 1, the lower frame 2, and the left and right vertical frames 3, thereby forming a circumferential frame, and an intermediate vertical frame or a middle member 4 is provided between the upper frame 1 and the lower frame 2 in parallel with the left and right vertical frames 3.

[0016] The door body is formed by bonding the first surface material 5 and the second surface material 6 to the door body frame. The first surface material 5 consists of a visible surface portion 50, left and right recessed edges 51 formed by bending at right angles at both ends of the visible surface portion 50 in the width direction, and an upper edge 52 formed by bending at right angles at the upper end of the visible surface portion 50. The second surface material 6 consists of a visible surface portion 60, left and right recessed edges 61 formed by bending at right angles at both ends of the visible surface portion 60 in the width direction, and an upper edge 62 formed by bending at right angles at the upper end of the visible surface portion 60.

[0017] [A-1] Upper frame The upper frame 1 is a long member extending in the width direction of the door body, and has a length (visible dimension) that is approximately corresponding to the door width (visible width) and a width (depth dimension) that is approximately corresponding to the thickness (depth width) of the door body. As shown in Figures 2 and 3, the upper frame 1 is formed in a U-shape in cross-section from an upper surface 10, a first visible edge 11 that hangs down from one end of the upper surface 10 in the width direction (depth direction), and a second visible edge 12 that hangs down from the other end of the upper surface 10 in the width direction (depth direction).

[0018] [A-2] Lower frame The lower frame 2 is a long member extending in the width direction of the door body, and has a length (visible dimension) that is approximately corresponding to the door width (visible width) and a width (depth dimension) that is approximately corresponding to the thickness (depth width) of the door body. As shown in Figures 2 and 3, the lower frame 2 is formed in a U-shape in cross-section from an upper surface 20, a first visible edge 21 hanging down from one end of the upper surface 20 in the width direction (depth direction), and a second visible edge 22 hanging down from the other end of the upper surface 20 in the width direction (depth direction). A locking groove 200 extending in the depth direction is formed on the upper surface 20 of the lower frame 2, located at the part to which the intermediate vertical frame 4 is attached.

[0019] [A-3] Vertical Frame The vertical frame 3 is a long member extending in the width direction of the door body, and has a length (height) that is approximately corresponding to the door height and a width (depth dimension) that is approximately corresponding to the thickness (depth width) of the door body. The left and right vertical frames 3 are symmetrical and have essentially the same shape.

[0020] As shown in Figure 1, the vertical frame 3 is formed in a U-shape in cross-section, consisting of a depth surface 30, a first facing edge 31 extending in the facing direction from one end of the depth surface 30 in the width direction (depth direction), and a second facing edge 32 extending in the facing direction from the other end of the depth surface 30 in the width direction (depth direction).

[0021] [A-4] Intermediate vertical frame The intermediate vertical frame 4 is a long member extending in the width direction of the door body, and has a length (height) that is approximately corresponding to the door height and a width (depth dimension) that is approximately corresponding to the thickness (depth width) of the door body. In this embodiment, the intermediate vertical frame 4 is located between the upper frame 1 and the lower frame 2 and consists of a main body 4' having a height that can be inserted between the upper and lower frames 1 and 2, an upper movable locking part 7 provided at the upper end of the main body 4', and a lower movable locking part 8 provided at the lower end of the main body 4'.

[0022] As shown in Figures 2 and 3, the main body 4' of the intermediate vertical frame 4 is formed in a U-shape in cross-section, consisting of a depth surface 40 and a pair of facing edges 41 extending in the facing direction from both ends of the depth surface 40 in the width direction (depth direction). Elongated vertical holes 400 are formed at the upper and lower ends of the depth surface 40 of the main body 4' of the intermediate vertical frame 4.

[0023] As shown in Figure 2, the upper movable locking portion 7 according to this embodiment is formed in a U-shape in cross-section from a face surface 70, a first visible edge 71, and a second visible edge 72, and a screw hole 700 is formed in the lower part of the face surface 70. The upper movable locking portion 7 is sized to be received in a recess formed from the face surface 40 and a pair of visible edges 41 of the main body 4'. When received in the recess, the face surface 70 of the upper movable locking portion 7 is close to or in contact with the inner surface of the face surface 40 of the main body 4', the first visible edge 71 is close to or in contact with the inner surface of one of the visible edges 41, and the second visible edge 72 is close to or in contact with the inner surface of the other visible edge 41. Furthermore, the outer shape and dimensions of the upper movable locking portion 7 are such that it fits and locks into the recess formed from the upper surface 10, the first visible edge 11, and the second visible edge 12 of the upper frame 1.

[0024] The upper movable locking portion 7 can be retracted, with the entire portion located inside the main body 4', or it can be projected, with the portion projecting from the upper end surface of the main body 4'. In the projected position, the upper movable locking portion 7 consists of a projection 7A that protrudes upward from the upper end surface of the main body 4' and locks into a recess in the upper frame 1, and a base portion 7B that is located inside the main body and fixed to the main body. The upper movable locking portion 7 is fixed to the main body 4' by a screw 9, with the screw hole 700 in the depth surface 70 of the base portion 7B aligned with the elongated hole 400 at the upper end of the depth surface 40 of the main body 4'. Alternatively, the elongated hole may be formed on the upper movable locking portion 7 side, and the screw hole may be formed in the main body 4'.

[0025] As shown in Figure 2, the lower movable locking portion 8 according to this embodiment is a rectangular plate-like piece, and a screw hole 80 is formed in the upper part of the rectangular plate-like piece. The depth of the lower movable locking portion 8 is slightly shorter than the inner depth of the depth surface 40 of the main body 4', and the lower movable locking portion 8 is movable in the height direction along the inner surface of the depth surface 40, and the lower movable locking portion 8 can take two positions: a retracted position in which the entire portion is located inside the main body 4', and a protruding position in which it protrudes from the lower end surface of the main body 4'.

[0026] The lower movable locking portion 8, which is in a protruding position, consists of a protruding portion 8A that protrudes downward from the lower end surface of the main body 4' and locks into the locking groove 200 on the upper surface 20 of the lower frame 2, and a base end portion 8B that is located inside the main body 4' and fixed to the main body 4'. The lower movable locking portion 8 is fixed to the main body 4' by a screw 9 with the screw hole 80 of the base end portion 8B aligned with the elongated hole 400 at the lower end of the visible surface 40 of the main body 4'. Alternatively, an elongated hole may be formed on the lower movable locking portion 8 side and a screw hole may be formed in the main body 4'.

[0027] [B] Assembly of the door body The second surface material 6 is placed on the floor, and the upper frame 1, lower frame 2, and left and right vertical frames 3 are attached to the visible surface portion 60 of the second surface material 6 and arranged in a perimeter. More specifically, the second visible edge 12 of the upper frame 1 is attached to the inner surface of the surface portion 60 of the second surface material 6, and the upper half of the upper surface 10 of the upper frame 1 is brought into contact with or attached to the upper edge 62. The second visible edges 32 of the left and right vertical frames 3 are attached to the inner surface of the visible surface portion 60 of the second surface material 6, and the depth edges 61 are brought into contact with or attached to the half of the depth surface 30 of the left and right vertical frames 3 on the side of the second visible edge 32. The second visible edge 22 of the lower frame 2 is attached to the inner surface of the visible surface portion 60 of the second surface material 6. In this embodiment, the upper end surfaces of the first visible edges 31 of the left and right vertical frames 3 abut against the lower end surface of the first visible edge 11 of the upper frame 1, the upper end surfaces of the second visible edges 32 of the left and right vertical frames 3 abut against the lower end surface of the second visible edge 12 of the upper frame 1, and the lower end surfaces of the visible surface 30, first visible edge 31, and second visible edge 32 of each vertical frame 3 abut against the upper surface 20 of the lower frame 2.

[0028] The upper frame 1, lower frame 2, and left and right vertical frames 3 are assembled in a perimeter, with the second visible edges 12, 22, and 32 being bonded to the inner surface of the visible surface portion 60 of the second surface material 6 with adhesive. Once the adhesive hardens, the door frame, assembled in a perimeter from the upper frame 1, lower frame 2, and left and right vertical frames 3, is fixed in place. Next, the intermediate vertical frame 4 is incorporated into the perimeter-assembled frame from the front. Alternatively, the intermediate vertical frame 4 may be incorporated into the perimeter-assembled frame from the front before the adhesive on the perimeter-assembled door frame hardens.

[0029] With the upper movable locking part 7 positioned inside the upper end portion of the main body 4' of the intermediate vertical frame 4 and the lower movable locking part 8 positioned inside the lower end portion, the intermediate vertical frame 4 is inserted into the space between the upper frame 1 and the lower frame 2, and the upper end surfaces of the pair of visible edges 41 of the main body 4' are brought close to or in contact with the lower end surfaces of the first visible edge 11 and the second visible edge 12 of the upper frame 1, and the lower end surface of the visible surface 40 of the main body 4' and the lower end surfaces of the pair of visible edges 41 are brought close to or in contact with the upper surface 20 of the lower frame 2. At this time, one of the visible edges 41 of the intermediate vertical frame 4 is bonded to the visible surface portion 60 of the second surface material 6.

[0030] From the state shown in the left diagram of Figure 3, the upper movable locking part 7 is slid upward along the elongated hole 400 so that the upper movable locking part 7 has a protruding part 7A that extends from the upper end surface of the main body 4' and a base end part 7B inside the main body 4'. The protruding part 7A locks into the recess formed by the upper surface 10 of the upper frame 1 and the first visible edge 11 and the second visible edge 12. In this state, the screw 9 is tightened to fix the position of the upper movable locking part 7.

[0031] The lower movable locking part 8 is slid downward along the elongated hole 400 so that the lower movable locking part 8 has a protruding part 8A that extends from the lower end surface of the main body 4' and a base end part 8B inside the main body 4'. The protruding part 8A engages with the locking groove 200 formed on the upper surface 20 of the lower frame 2. In this state, the screw 9 is tightened to fix the position of the lower movable locking part 8.

[0032] In Figure 3, the upper frame 1, lower frame 2, and intermediate vertical frame 4 are actually in a horizontal position with the second visible edge 12 of the upper frame 1, the second visible edge 22 of the lower frame 2, and the visible edge of the intermediate vertical frame 4 (hidden in the orientation of Figure 3) bonded to the surface material (not shown). In the right diagram of Figure 3, the upper movable locking part 7 of the intermediate vertical frame 4 is locked into the recess of the upper frame 1, and the lower movable locking part 8 is locked into the locking groove 200 of the lower frame 2, preventing the intermediate vertical frame 4 from tipping over even before the adhesive between the visible edge 41 of the intermediate vertical frame 4 and the surface material hardens.

[0033] The first surface material 5 is attached to the frame assembled around the perimeter on the second surface material 6 placed on the floor. The inner surface of the visible surface portion 50 of the first surface material 5 is bonded to the first visible edge 11 of the upper frame 1, the first visible edge 21 of the lower frame 2, the first visible edges 31 of the left and right vertical frames 3, and the visible edge 41 of the intermediate vertical frame 4. The upper edge 52 of the first surface material 5 is brought into contact with or bonded to the half of the upper surface 10 of the upper frame 1 on the side of the first visible edge 11. The left and right visible edges 51, 51 of the first surface material 5 are brought into contact with or bonded to the half of the visible surface 30 of the left and right vertical frames 3 on the side of the first visible edge 31.

[0034] Figure 4 shows the assembled door body. Figure 4 shows the door body according to the second embodiment described below, but the basic structure of the door body is the same. The visible surface portion 50 of the first surface material 5 forms one visible surface of the door body, and the visible surface portion 60 of the second surface material 6 forms the other visible surface of the door body. The depth edge 51 of the first surface material 5 abuts against or is bonded to the depth half of the depth surface 30 of the vertical frame 3, and the depth edge 61 of the second surface material 6 abuts against or is bonded to the depth half of the depth surface 30 of the vertical frame, and the tip surfaces of the depth edge 51 and the tip surfaces of the depth edge 61 abut or are close together, and the depth surface of the door body is formed from the depth edges 51 and 61. The upper edge 52 of the first surface material 5 abuts against or is bonded to the half-depth portion of the upper surface 10 of the upper frame 1, and the upper edge 62 of the second surface material 6 abuts against or is bonded to the half-depth portion of the upper surface 10 of the upper frame 1, with the leading edge of the upper edge 52 and the leading edge of the upper edge 62 abutting against or being close together, and the upper surface of the door body is formed from the upper edges 52 and 62. Note that the first surface material 5 and the second surface material 6 may not have upper edges 52 and 62. The shapes of the upper movable locking portion 7 and the lower movable locking portion 8 in this embodiment are not limited to the illustrated form. For example, depending on the orientation of the upper frame and the lower frame, the shape of the upper movable locking portion may be plate-shaped and the shape of the lower movable locking portion may be U-shaped. Alternatively, in the upper movable locking portion, instead of a U-shape, the upper movable locking portion may be formed from a thick plate, and the end face of the thick plate may be made to abut against the inner surfaces of the first visible edge 11 and the second visible edge 12 of the upper frame 1.

[0035] [II] Second Embodiment The second embodiment will be described with reference to Figures 5 to 7. The first and second embodiments include common configurations, and common elements are given the same reference numerals. For the explanation of elements given the same reference numerals, the description of the first embodiment can be appropriately referenced. The first embodiment is characterized in that the door frame is provided with movable locking parts 7 and 8 at both ends of the intermediate vertical frame 4 in the height direction, whereas the second embodiment is characterized in that the door frame is provided with a movable locking part at one end of the intermediate vertical frame 4 in the height direction and a fixed locking part at the other end.

[0036] As shown in Figure 5, the intermediate vertical frame 4 according to the second embodiment includes an upper movable locking portion 7 and a lower fixed locking portion. The configuration of the upper movable locking portion 7 is the same as that of the upper movable locking portion 7 of the intermediate vertical frame 4 according to the first embodiment, and the description in the first embodiment can be applied by reference.

[0037] The lower end surface of the depth surface 40 of the intermediate vertical frame 4 consists of a downward-pointing isosceles triangular projection 401 and horizontal end surfaces 402 on both sides of the projection 401, with the projection 401 forming the lower fixing locking portion. The depth of the base end of the projection 401 is the same as the depth dimension of the locking groove 200 on the upper surface 20 of the lower frame 2, and when the projection 401 of the lower fixing locking portion is locked in the locking groove 200, the horizontal end surfaces 402 are close to or in contact with the upper surface 200 of the lower frame 2. The shape of the projection 401 is not limited to that shown in the figure, and may be, for example, semicircular or rectangular.

[0038] Similar to the first embodiment, with the upper frame 1, lower frame 2, and left and right vertical frames 3 assembled in a perimeter, the second visible edges 12, 22, and 32 are bonded to the inner surface of the visible surface portion 60 of the second surface material 6. As the adhesive hardens, the door frame, assembled in a quad-frame structure from the upper frame 1, lower frame 2, and left and right vertical frames 3, is fixed in place. Next, the intermediate vertical frame 4 is incorporated into the perimeter-assembled frame from the front.

[0039] The intermediate vertical frame 4 is inserted into the space between the upper frame 1 and the lower frame 2 in a position tilted in the front-rear direction (depth direction), and the protruding portion 401 (lower fixing locking portion) is rotated while being inserted into the locking groove 200, so that the horizontal end face 402 approaches or comes into contact with the upper surface 20 of the lower frame 2, and the upper end faces of the pair of visible edges 41 of the main body 4' approach or come into contact with the lower end faces of the first visible edge 11 and the second visible edge 12 of the upper frame 1. At this time, one of the visible edges 41 of the intermediate vertical frame 4 is bonded to the visible surface portion 60 of the second surface material 6.

[0040] From this state, the upper movable locking part 7 is slid upward along the elongated hole 400 so that the upper movable locking part 7 has a protruding part 7A that extends from the upper end surface of the main body 4' and a base end part 7B inside the main body 4'. The protruding part 7A locks into a recess formed by the upper surface 10 of the upper frame 1 and the first visible edge 11 and the second visible edge 12 (see the upper movable locking part 7 in Figure 3). In this state, the screw 9 is tightened to fix the position of the upper movable locking part 7.

[0041] The upper movable locking portion 7 of the intermediate vertical frame 4 is locked into the recess of the upper frame 1, and the protruding portion 401 (lower fixed locking portion) is locked into the locking groove 200 of the lower frame 2, so that the intermediate vertical frame 4 does not tip over even before the adhesive between the visible edge 41 of the intermediate vertical frame 4 and the surface material hardens.

[0042] The first surface material 5 is attached to the frame assembled on the second surface material 6 placed on the floor. The inner surface of the visible surface portion 50 of the first surface material 5 is bonded to the first visible edge 11 of the upper frame 1, the first visible edge 21 of the lower frame 2, the first visible edges 31 of the left and right vertical frames 3, and the visible edge 41 of the intermediate vertical frame 4. The upper edge 52 of the first surface material 5 is brought into contact with or bonded to the half of the upper surface 10 of the upper frame 1 on the side of the first visible edge 11. The left and right visible edges 51, 51 of the first surface material 5 are brought into contact with or bonded to the half of the visible surface 30 of the left and right vertical frames 3 on the side of the first visible edge 31.

[0043] [III] Third Embodiment The third embodiment will be described with reference to Figures 8 and 9. The first and third embodiments include common components, and the same reference numerals are used for common elements. For explanations of elements with the same reference numerals, the description of the first embodiment can be appropriately referenced. The third embodiment is characterized in that the door frame has a movable locking part at one end of the intermediate vertical frame 4 in the height direction and a fixed locking part at the other end, and is also a modification of the second embodiment.

[0044] As shown in Figure 8, the intermediate vertical frame 4 according to the third embodiment includes an upper fixed locking portion 7' ​​and a lower movable locking portion 8. The configuration of the lower movable locking portion 8 is the same as that of the lower movable locking portion 8 of the intermediate vertical frame 4 according to the first embodiment, and the description in the first embodiment can be applied by reference.

[0045] The upper fixed locking portion 7' ​​according to this embodiment consists of a member formed in a U-shape in cross-section from a visible surface 70', a first visible edge 71', and a second visible edge 72'. The shape of the upper fixed locking portion 7' ​​according to this embodiment is substantially the same as the shape of the upper movable locking portion 7. More specifically, this member consists of a protruding portion that projects upward from the upper end surface of the main body 4', and a base end portion that is located inside the main body 4' and fixed to the main body 4', with the protruding portion being configured to lock into a recess in the upper frame 1.

[0046] Similar to the first embodiment, with the upper frame 1, lower frame 2, and left and right vertical frames 3 assembled in a perimeter, the second visible edges 12, 22, and 32 are bonded to the inner surface of the visible surface portion 60 of the second surface material 6. As the adhesive hardens, the door frame assembled in a quad-frame manner from the upper frame 1, lower frame 2, and left and right vertical frames 3 is fixed in place. Next, the intermediate vertical frame 4 is incorporated into the perimeter-assembled frame from the front.

[0047] With the intermediate vertical frame 4 tilted in the left-right direction (visible direction), insert it into the space between the upper frame 1 and the lower frame 2. Rotate the upper fixing locking part 7' while inserting it into the recess of the upper frame 1, so that the lower end of the main body 4' of the intermediate vertical frame 4 approaches or comes into contact with the upper surface 20 of the lower frame 2. In this state, the upper fixing locking part 7' is locked into the recess of the upper frame 1.

[0048] From this state, the lower movable locking part 8 is slid downward along the elongated hole 400 so that the lower movable locking part 8 has a protruding part 8A that extends from the lower end surface of the main body 4' and a base end part 8B inside the main body 4'. The protruding part 8A engages with the locking groove 200 formed on the upper surface 20 of the lower frame 2 (see the lower movable locking part 8 in Figure 3). In this state, the screw 9 is tightened to fix the position of the lower movable locking part 8.

[0049] The upper fixing locking portion 7' ​​of the intermediate vertical frame 4 is locked into the recess of the upper frame 1, and the lower movable locking portion 8 is locked into the locking groove 200 of the lower frame 2, preventing the intermediate vertical frame 4 from tipping over even before the adhesive between the visible edge 41 of the intermediate vertical frame 4 and the surface material hardens. In addition, the upper fixing locking portion may be formed from a thick plate instead of a U-shape, and the end face of the thick plate may be made to abut against the inner surfaces of the first visible edge 11 and the second visible edge 12 of the upper frame 1. [Explanation of Symbols]

[0050] 1. Top frame (horizontal frame) 10 Top surface (view surface) 11. First lookout edge 12. Second side of the facade 2. Bottom frame (horizontal frame) 20 Top surface (view surface) 200 Locking groove 21 First lookout edge 22 Second Mitsuke area 3. Vertical Frame 4. Intermediate vertical frame (intermediate frame) 4' Main body 401 Projection part (lower fixed locking part) 5 First surface material 6 Second surface material 7 Upper movable locking part 7A Protrusion 7B Base end 7´ Upper fixed locking part 8 Lower movable locking part 8A protrusion 8B Base end

Claims

1. The frame structure of the door body, which is assembled in a perimeter from upper and lower horizontal frames and left and right vertical frames, It has an intermediate frame parallel to one of the opposing frames, The longitudinal ends of the aforementioned intermediate frame are locked to the other opposing frame. The aforementioned intermediate frame is It consists of a main body having a height that allows it to be inserted between the other opposing frame, a retracted position provided on at least one side in the longitudinal direction of the main body where the entire body is located inside the main body, and a movable locking part that takes a protruding position protruding from one end of the main body. The movable locking portion in a protruding position consists of a protruding portion that locks onto one side of the other opposing frame, and a base end portion located inside the main body and fixed to the main body. The frame structure of the door body.

2. The frame on one side of the other opposing frame comprises a face surface and a pair of facing edges, and includes a recess formed from the face surface and the pair of facing edges, the recess opening toward the other side of the other opposing frame. The protruding portion of the movable locking portion is locked into the recess. The door frame structure according to claim 1.

3. The other opposing frame has a front surface and a pair of front edges, and the front surface is located on the side of the other opposing frame that is closer to the other frame. The protruding portion of the movable locking part is locked into the locking groove formed in the surface. The door frame structure according to claim 1.

4. The movable locking portion consists of a first movable locking portion provided on one side in the longitudinal direction of the main body and a second movable locking portion provided on the other side in the longitudinal direction of the main body. The intermediate frame consists of the main body, the first movable locking portion, and the second movable locking portion. The door frame structure according to claim 1.

5. The intermediate frame comprises the main body, the movable locking portion provided on one side in the longitudinal direction of the main body, and the fixed locking portion formed on the other side in the longitudinal direction of the main body. The other frame of the opposing frame comprises a face surface and a pair of facing edges, the face surface being located on the side of the opposing frame of the other frame that is closer to one side of the frame. The aforementioned fixing locking portion has a shape that allows it to lock into the locking groove formed in the surface. A door frame structure according to any one of claims 1 to 3.

6. The intermediate frame comprises the main body, the movable locking portion provided on one side in the longitudinal direction of the main body, and the fixed locking portion formed on the other side in the longitudinal direction of the main body. The other side of the opposing frame has a recess formed from a face surface and a pair of facing edges, and the recess is open toward one side of the opposing frame. The aforementioned fixing locking portion is lockable into the recess. A door frame structure according to any one of claims 1 to 3.

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