JPH07293115A - Reform construction method for metallic door frame - Google Patents

Abstract

PURPOSE:To improve appearance, and increase strength by installing a new door frame onto a sub-frame member welded to an old frame, concurrently dividing the new door frame into an indoor and an outdoor one at the center of its width so as to be independently formed into each framed structure, and thereby advancing welding along divided positions at a work site. CONSTITUTION:An outside new door frame Fa is fitted in the inner side after a sub- frame member 1 has been fixed onto an old door frame S by spot welding. The interior surface frame 27 of the door frame Fa is then installed onto the outside installation frame 21 of the sub-frame 1 with screws 35. An inside new door frame Fb is fitted in in such a way as to be over the door frame Fa. And the interior surface frame 31 of the door frame Fb is installed onto the inside installation frame 22 of the sub- frame 1 with screws 37. Furthermore, it is welded to the inside of a door stopping rubber installation coupling groove 22 along divided positions P. By this constitution, since a reduction in inner dimension for the new door frame can be restrained, its entrance can be made larger in size than a former one, the installation strength of the new door frame can thereby be concurrently increased, furthermore, welding spots hardly be seen, its appearance can be enhanced, and as a result, construction can be thereby efficiently and easily carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remodeling method as a method for covering a metal door frame at a doorway entrance, a kitchen doorway, etc.

[0002]

2. Description of the Related Art In a metal door frame, it is rusted and unsightly rots, and even if it does not rot, it becomes obsolete and old-fashioned, so it may be replaced. Examples of this remodeling method include a peeling method for removing the old door frame and a cover method for installing the new door frame while leaving the old door frame as it is.

FIG. 4 shows a remodeling door frame by a conventional cover construction method. In this case, the old door frame 36 is made of steel, and a new door frame 38 in which the door 40 is housed is attached to the old door frame 36. Since it is necessary to place the new door frame 3 in the same position inside the old door frame 36,
8 is inserted, and connecting members 42 and 43 are interposed between them to be connected to the old door frame 36 by welding or the like.

[0004]

Among the conventional remodeling methods as described above, the opening method opens the frontage so that a new door frame having the same dimensions as the old door frame can be attached. It takes a lot of labor to destroy a hard concrete wall, and the cost is not only excessive, but there is also a problem that the building frame is unexpectedly damaged by vibrating other places.

Under these circumstances, the cover construction method is often adopted, but when this is done, a large space is created between the door frame and the old door frame due to the interposition of the connecting member, and thus the connection is established. Not only is the stability of the new door frame eliminated, but the vertical and horizontal internal dimensions of the new door frame are significantly reduced,
The appearance will decline and it will be inconvenient to enter and exit. In addition, in order to complement the concrete wall 44, the complementary member 4 is provided inside and outside.
6 and 48 are applied, and the caulking material 50 is filled in the places where the gaps and the recesses are formed, and the appearance is significantly deteriorated.
Moreover, workability was never improved because of the use of small connecting means.

The present invention solves the above-mentioned drawbacks of the cover construction method, and can secure the stability of the installation of the new door frame and can suppress the decrease of the inner dimension thereof as much as possible. , The installation of the new door frame is stable,
It is an object of the present invention to provide a method for reforming a metal door frame that improves the appearance.

[0007]

In order to achieve the above object, the metal door frame remodeling method according to the present invention allows the old door frame to be left as it is and left and right vertical frames and upper and lower frames of the old door frame. The new door frame is attached to the base member separately by resistance welding, and at least the left and right vertical frames and the upper frame are resistance welded to the base member so that the new door frame is attached to the new door frame. The frame is divided into the interior and exterior at the center of the width that is difficult to see, and the external new door frame and the internal new door frame are separately framed, and the separately framed external new door frame and internal new door frame are divided at the site. It is characterized by being welded along and integrated.

Further, the position where the outer new door frame and the new inner door frame are divided is provided in the fitting groove of the tight material, and the inner surface of the fitting groove may be welded for integration.

[0009]

[Operation] When installing the new door frame on top of the old door frame, first, resistance-welding the base member to the old door frame, but do not make a gap between them for resistance welding. Since the base member is covered with the new door frame member, there is no need to provide a gap between them, so that the total thickness of the base member and the new door frame member is minimized. With all efforts, the inner dimensions of the new door frame can be reduced to a very small extent.

Since the new door frame is attached to the base member, its attachment is stable. In addition, the traces of resistance welding left on the outer surface of the base member are covered with the new door frame and become completely invisible, and the welding between the new external door frame and the new internal door frame is difficult to see. It has no effect. Incidentally, as the hard-to-see portion, there can be mentioned a fitting groove portion of a tight material as in an example described later.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1, FIG. 2 and FIG. 3 show an example implemented at the entrance and exit of the entrance. The metal door frame reforming method is a so-called cover method in which the old door frame S is left as it is. The new door frame F is adhered to the new door frame F when it is hidden, and the base member 1 that serves as a reinforcement is used for the adherence and the frame dividing means is adopted. A new door D is attached to the frame F.

The old door frame S has a frame structure composed of left and right vertical frames 2, 2 and upper and lower frames 3, 4, and each of the frames 2, 2, 3, 4 is provided.
Regarding the cross-sectional shape, the stepped portion 5 is formed in a dovetail groove shape opening to the outside of the frame periphery, and a step portion 5 is formed at the center of the expected width such that the outside is widened on the inner periphery side of the frame. That is, the door was also attached to the old door frame S.
Further, the old door frame S is strongly fixed to the concrete building frame 7 via the anchor 9.

The new door frame F has the following means for dividing the frame:
The outer new door frame Fa and the inner new door frame Fb are separately assembled in a factory, and are welded and integrated at a site.
The base members 1, 1 are resistance-welded in advance to the left and right vertical frames 2, 2 and the upper and lower frames 3, 4, respectively. It should be noted that resistance welding is known as a type of welding that can perform work very efficiently.

As for the base member 1, the base members 1, 1 which correspond to the left and right vertical frames 2, 2 and the upper frame 3 of the old door frame S are fixed so that the new door frame F can be fixedly attached thereto. It has a wider expected width inside and outside than those, and has a shape that abuts on the inner surface so that resistance welding can be performed. Also,
An outer mounting flange 21 and an inner mounting flange 22 that are bent at right angles in the outer peripheral direction of the frame are provided at both ends in the width direction so that the new door frame F can be stably attached and screwed inside and outside.

As for the base member 1 contacting the lower frame 4,
Exceptionally, the width is almost the same as that of the lower frame 4, the raised refraction portion 6 is provided in the lower stage, and it has a special cross-sectional shape.
It does not have an outer mounting collar 21 and an inner mounting collar 22 as in 2-3. However, the new door frame F is strongly coupled to the old door frame S via the three base members 1, 1, 1 of the frame members 2, 2, 3. Further, both of them have the same step portion 19 in the center of the width, but the new door frame F has the step portion 19
The fitting groove 22 of the tight material 20 as a door rubber against which the door D abuts at the position is provided.

Each of the frame members of the external new door frame Fa is provided with a short joint 25 that bends in the inner circumferential direction of the frame so as to be joined to the step portion 19 of the base member 1 at the indoor side end, and on the opposite outdoor side. At the end, a long outdoor surface flange 27 that bends in the outer peripheral direction of the frame is formed so as to be joined to the outer surface of the outer mounting flange 21 of the base member 1, and an inward bending portion 29 is provided at the tip thereof.

The internal new door frame Fb is provided with an indoor surface flange 31 corresponding to the outdoor surface flange 27 at an end on the indoor side, the indoor surface flange 31 being joined to the inner mounting flange 22 of the base member 1, and the right-angled bending portion 3 thereof.
0 is provided. Then, caulking material 32 is filled between the bent portions 29 and 30 of the outer new door frame Fa and the inner new door frame Fb and the wall surface or floor surface of the building frame 7.

The inner new door frame Fb is further provided with a projecting portion 33 which is located outside the joint 25 of the outer new door frame Fa at the outdoor side end, and the portion of the projecting portion 33 bends to the joint brim 25 side. It has a double-folded double structure. The fitting groove 22 is formed by the joint collar 25 and the protruding portion 33.

Regarding the procedure for attaching the new door frame F,
After spot-welding the base member 1 to the old door frame S, the outer new door frame Fa is fitted inside, the outer surface flange 27 is fixed to the outer mounting flange 21 of the base member 1 with the screw 35, and then the outer new door The inner new door frame Fb is fitted so as to be above the frame Fa, and similarly the inner surface flange 31 is screwed into the inner surface flange 22 with the screw 37.
Stop with. Then, welding is performed along the dividing position P inside the fitting groove 22. Since the protruding portion 33 of the new internal door frame Fb is doubled, the appearance inconvenience that the color change due to welding spreads to the outside is prevented.

Watertightness can be enhanced by using screws with silicone packing for the screws 35 and 37. Further, after the rustproofing treatment, the surface coating is performed so that the screws 35 and 37 cannot be seen.

Regarding the base members 1, 1 welded to the one vertical frame 2 and the upper frame 3 of the old door frame S, spaces 39, 39 are provided between the new door frame F and the new door frame F. For the purpose of storing the back plate 41 for mounting the door D, and a very small amount of space is sufficient.

[0023]

As described above, according to the present invention, there are the following excellent effects.

As the cover construction method, the new door frame can be mounted so as not to provide a large gap with the old door frame, so that the sacrifice of the reduction in the inner dimension of the new door frame can be suppressed as much as possible, and The entrance and exit will be conveniently large, and the mounting strength and appearance of the new door frame will also be good.

Regarding the mounting strength, not only the base member is resistance-welded to the old door frame and the connection is large, but
Since the new door frame is attached to the base member in the cross section of the member, it never comes off. In addition, although the external new door frame and the internal new door frame are welded as the attaching means, the welded portion is difficult to see, and the resistance welding portion of the base member is completely hidden by the new door frame. The appearance is also very good.

Since the base member can be attached very easily and the new door frame can be easily attached, the work efficiency of the cover construction method can be improved.

In addition, when a dividing position is provided on the inner surface of the fitting groove of the tight material (claim 2), it is suitable for further improving the appearance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a front door showing an embodiment as a reform door frame.

FIG. 2 is a vertical sectional view of the entrance.

FIG. 3 is a front view seen from outside the entrance.

FIG. 4 is a partial cross-sectional view of a remodeling door frame showing a conventional example.

[Explanation of symbols]

 F New door frame Fa External new door frame Fb Internal new door frame P Split position S Old door frame 1 Base member 2 Vertical frame 3 Upper frame 4 Lower frame 20 Tight material 22 Fitting groove

Claims (2)

[Claims] 1. A base which is left as it is and is left as it is, and resistance welding is performed while separately applying a base member to the left and right vertical frames and the upper and lower frames of the old door frame respectively, and at least the left and right vertical frames and the upper frame are resistance welded. The new door frame is divided into the interior and exterior at the center of the width where it is difficult to see so that the new door frame is attached to the member in the cross section of the member. A method of reforming a metal door frame, characterized in that the external new door frame and the internal new door frame, which are separately framed, are welded and integrated along the dividing position on site. 2. A split position between the outer new door frame and the inner new door frame is provided in a fitting groove of a tight material, and welding for integration is performed on the inner surface of the fitting groove. Item 1. A method for reforming a metal door frame according to Item 1.