JP7386089B2 - Fixed structure of disposable frame - Google Patents

Description

The present invention relates to a fixing structure for a disposable frame used in a door frame consisting of a three-sided frame.

Door frames such as hinged doors generally have a rectangular four-frame frame, but there are also door frames with a three-sided frame without a bottom frame (slip). The door frame is assembled in a factory, then transported to the site and installed in the opening, but the three-sided frame is unstable in shape and may deform during transportation. In order to prevent the three-sided frame from deforming during transportation, we welded waste frames (lower frames) to the lower ends of the left and right vertical frames of the three-sided frame at the factory and transported it as a temporary four-frame frame. The disposable frame can be removed by cutting the welded part. However, since sparks may be generated when cutting the welded part with a sander or the like, such a disposable frame cannot be used at a site where hot work is not possible. In addition, skill is required to cut the welded part cleanly.

On the other hand, by fixing the disposable frame to the lower ends of the left and right vertical frames of the three-sided frame using screws, the disposable frame can be used even in sites where hot work is not possible. The removal work used does not require skill. FIG. 10 shows a conventional disposable frame fixing structure using screws. Anchors 5' having an L-shape in cross section are fixed to the lower ends of the left and right vertical frames 2' of the three-sided frame, and two parallel disposable frames 3' are placed between the lower ends of the left and right vertical frames 2'. During the construction, both lengthwise ends of the sacrificial frame 3' are brought into contact with the lower surface of the anchor 5' and fixed with screws 6'. However, in this fixing structure, members fixed with screws can rotate around the screws, and the strength is inferior to that of a welded fixing structure in preventing deformation of the three-sided frame.

Patent Document 1 describes the provision of a frame for a door opening that is as easy to handle as a four-sided frame when attached to a door opening, and that can also exhibit the convenience of a three-sided frame after installation. For this purpose, in the door opening frame, the bottom frame material is removable from the bottom end of each vertical frame material, and after being attached to the door opening, the bottom frame material that is no longer needed can be removed. , a three-sided frame is disclosed. The purpose of this product is to improve the handling when installing the three-sided frame to the door opening, and the fixing structure of the bottom frame and vertical frame is fixed to the opening as a four-sided frame with the bottom frame. It is required that the bottom frame material be removable after being installed.

JP 7-139262

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure for fixing a waste frame that is easy to work on-site and has excellent strength when fixing a waste frame to three door frames.

The technical means adopted by the present invention are:
The lower end portions of the left and right vertical frames of the three-sided frame consisting of the upper frame and the left and right vertical frames are connected by at least one disposable frame,
The disposable frame consists of an elongated portion extending in the width direction of the three-sided frame, and left and right vertical pieces formed in a rising shape at both end portions in the length direction of the elongated portion,
The disposable frame is arranged such that both ends in the length direction of the elongated portion are in contact with the lower ends of the left and right vertical frames, and the left and right vertical pieces are in contact with the lower end parts of the left and right vertical frames. the vertical piece and the lower end part are fixed with screws,
It has a fixed structure with a disposable frame.

In one embodiment, the disposable frame has both ends in the length direction of the elongated portion contacting the lower ends of the left and right vertical frames, and the left and right vertical pieces contacting lower end portions of the outer sides of the left and right vertical frames. The left and right vertical pieces and the lower end portion are fixed with screws while in contact with each other.

In one aspect, the left and right vertical frames have a first finding surface, a second finding surface, an inner facing surface connecting the inner ends of the first finding surface and the second finding surface, and a first finding surface. A first outer prospect side extending in the prospect direction from the outer end of the finding surface, and a second outer prospect side extending in the prospect direction from the outer end of the second finding surface,
A connecting element is provided for connecting the lower end portions of the first outer prospective side and the second outer prospective side,
The connecting element has a vertical surface, and the left and right vertical pieces are fixed to the connecting element by screws in abutting contact with the vertical surface of the connecting element.

In one aspect, the elongated portion of the disposable frame is formed into a U-shape in cross section from an upper surface portion, and a first facing side and a second facing side depending from the upper surface portion,
L-shaped end elements are fixed to both lengthwise ends of the elongated portion, including a first vertical piece and a second horizontal piece;
Both longitudinal ends of the upper surface of the elongated portion are in contact with lower ends of the left and right vertical frames, and the first pieces of the end elements form the left and right vertical pieces.
In one aspect, the end element is fixed to the lower surface of the upper surface part with an edge of the second piece in contact with or close to the inner surface of the first found side and the second found side. ing.

In the present invention, the disposable frame is inserted into the left and right vertical frames through the left and right vertical pieces formed in a rising shape at both longitudinal ends, with both lengthwise end portions in contact with the lower ends of the left and right vertical frames. By fixing to the lower end portion of 2 (particularly the surface extending in the direction of view) with screws, a four-circumference frame is formed, so that the four-circumference frame can be prevented from deforming by resisting rotation and twisting that acts on the four-circumference frame. Maintain the stable shape of the frame.
Further, since the fixing structure of the disposal frame according to the present invention uses screws, the disposal frame can be easily removed at the site, and it can also be used at sites where hot work is not possible.

It is a front view and a side view of the door frame provided with the fixing structure of the waste frame concerning a 1st embodiment. It is a partially omitted enlarged cross-sectional view of the door frame shown in FIG. 1. FIG. 2 is an enlarged longitudinal sectional view of a lower portion of the door frame shown in FIG. 1, with a portion omitted; They are a top view, a front view, and a side view of the disposable frame according to the first embodiment. It is a figure which shows the fixing structure of the waste frame concerning 2nd Embodiment, and is a cross-sectional view, a side view, and a longitudinal cross-sectional view of the lower part of one width direction of a four-periphery frame. It is a figure which shows the fixing structure of the waste frame concerning 3rd Embodiment, and is a cross-sectional view, a side view, and a longitudinal cross-sectional view of the lower part of one width direction of a four-periphery frame. It is a figure which shows the fixing structure of the disposable frame based on 4th Embodiment, and is a cross-sectional view, a side view, and a longitudinal cross-sectional view of the lower part of one width direction of a four-periphery frame. It is a figure which shows the fixing structure of the disposable frame based on 5th Embodiment, and is a cross-sectional view, a longitudinal sectional view, and a side view of the lower part of one width direction of a four-periphery frame. It is a figure which shows the fixing structure of the disposable frame based on 6th Embodiment, and is a cross-sectional view, a longitudinal sectional view, and a side view of the lower part of one width direction of a four-periphery frame. It is a figure explaining the fixing structure of the disposable frame using the conventional screw.

Embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a front view of a door frame (before being attached to an opening) equipped with a structure for fixing a disposable frame according to the present embodiment, and the door frame includes an upper frame 1 and left and right vertical frames 2. This is a temporary four-peripheral frame in which a sacrificial frame 3 as a lower frame is provided at the lower end portions of the left and right vertical frames 2 in a three-sided frame consisting of. The four-frame frame shown in Fig. 1 is assembled in a factory and delivered to the site as a four-frame frame, and the discarded frame 3 is removed at the site and installed as a three-sided door frame consisting of an upper frame 1 and left and right vertical frames 2 at the opening. It is attached.

A three-sided frame consisting of an upper frame 1 and left and right vertical frames 2 has the upper end of the left and right metal (e.g., steel) vertical frames 2 connected to the length of the metal (e.g., steel) upper frame 1. It can be assembled by fixing (welding, screwing, etc.) at both ends. As shown in FIG. 2, the left and right vertical frames 2 have a first finding surface 20, a second finding surface 21, and an inner side connecting the inner ends of the first finding surface 20 and the second finding surface 21. The inner prospect surface includes a first inner prospect surface 22 extending in the prospect direction from the inner end of the first finding surface 20 and a second inner prospect surface extending in the prospect direction from the inner end of the second finding surface 21. It consists of a surface 23 and a convex central prospect portion 24 located between the first inner prospect surface 22 and the second inner prospect surface 23 . The central viewing section 24 includes a central viewing surface 240, a first central viewing surface 241, and a second central viewing surface 242. The left and right vertical frames 2 further include a first outer prospect edge 25 extending in the perspective direction from the outer end of the first finding surface 20, and a second outer prospect edge extending in the perspective direction from the outer end of the second finding surface 21. It is equipped with 26. In one aspect, the upper frame 1 has a cross-sectional shape similar to that of the vertical frame 2, but the shape is not limited, and detailed description thereof will be omitted.

In the vertical frame 2, the first outside expected side 25 and the second outside expected side 26 are spaced apart, and there is a space between the first outside expected side 25 and the second outside expected side 26 in the height direction of the vertical frame 2. A plurality of connecting elements 5 are fixed (welded, screwed, etc.) at intervals to improve the strength of the vertical frame 2. The lowest connecting element 5 of the plurality of connecting elements 5 connects the lower end portions of the first outer prospective side 25 and the second outer prospective side 26 (see FIG. 1). The connecting element 5 according to the present embodiment is a plate made of metal (for example, steel), and is fixed in a vertical position between the first outer prospective side 25 and the second outer prospective side 26, and the connecting element 5 The surface portion is the expected surface on the outside of the vertical frame 2.

The fixing structure of the disposable frame according to the first embodiment will be described with reference to FIGS. 1 to 4. As shown in FIG. 4, the disposable frame 3 includes an elongated portion 3A and end elements 4 fixed to both longitudinal ends of the elongated portion 3A. The disposable frame 3, including the elongated portion 3A and the end element 4, is made of metal (eg, steel).

The elongated portion 3A is formed into a U-shape in cross section, including an upper surface portion 30 that is a horizontal surface, and a first facing side 31 and a second facing side 32 that hang down from the upper surface portion 30. The length dimension of the elongated portion 3A is approximately the width dimension of the three-sided frame, specifically, the dimension between the outer surfaces (first outer side 25, second outer side 26) of the left and right vertical frames 2. They are the same, and the sacrificial frame 3 has dimensions such that both lengthwise end portions of the upper surface portion 30 abut the lower ends of the left and right vertical frames 2.

The end element 4 has an L shape consisting of a vertical first piece 40 and a horizontal second piece 41, and the end edge of the second piece 41 is the first found side 31 of the elongated portion 3A, The upper surface portion is in contact with or close to the inner surface of the second finding side 32, and the lower end of the inner surface of the first piece 40 is in contact with the longitudinal edge of the upper surface portion 30 of the elongated portion 3A. The first piece 40 is fixed (welded, screwed, etc.) to the lower surface of the elongated portion 30, and the first piece 40 forms a vertical piece rising vertically from both ends in the length direction of the elongated portion. The first piece 40 has an insertion hole 400 for the screw 6 formed therein.

In this embodiment, as shown in FIG. 2, two sacrificial frames 3 are provided that connect the lower end portions of the left and right vertical frames 2, and one of the sacrificial frames 3 is connected to the upper surface of the upper surface portion 30 of the elongated portion 3A. Both ends in the length direction contact the lower ends of the left and right vertical frames 2 (the first inner prospecting surface 22, the central prospecting surface 240 and the first central prospecting surface 241 of the central prospecting part 24) and the lower end of the connecting element 5, With the first piece (vertical piece) 40 of the left and right end elements 4 in contact with the vertical prospective surface of the connecting element 5 fixed to the outer lower end portion of the left and right vertical frame 2, One piece (vertical piece) 40 and the connecting element 5 are fixed with screws 6, and the other disposable frame 3 has left and right vertical frames 2 at both longitudinal ends of the upper surface of the upper surface 30 of the elongated portion 3A. (the second inner prospecting surface 23, the center prospecting surface 240 and the second central prospecting surface 242 of the central prospecting section 24) contact the lower ends of the connecting element 5, and the first piece (vertical) of the left and right end elements 4 With the left and right first pieces (vertical pieces) 40 and the connecting element 5 in a state in which the left and right first pieces (vertical pieces) 40 are in contact with the vertical prospective surface consisting of the connecting elements 5 fixed to the outer lower end portions of the left and right vertical frames 2, are fixed with screws 6.

In this embodiment, two sacrificial frames 3 are provided to connect the lower end portions of the left and right vertical frames 2, but the number of sacrificial frames 3 is not limited, and may be one, for example. In this embodiment, the sacrificial frame 3 is formed from the long portion 3A and the end element 4, but rising vertical pieces may be integrally formed at both lengthwise ends of the sacrificial frame 3.

The fixing structure of the disposable frame according to the second embodiment will be described with reference to FIG. 5. The shape of the left and right vertical frames 2 and the shape of the disposable frame 3 are the same as those in the first embodiment, and the description related to the first embodiment can be used. In the first embodiment, the first pieces (vertical pieces) 40 at both left and right ends of the left and right ends of the left and right vertical frames 2 are in contact with the connecting elements 5 fixed to the outer lower end portions of the left and right vertical frames 2, and One piece (vertical piece) 40 and the connecting element 5 are fixed with screws 6, but in the second embodiment, the first piece (vertical piece) 40 at both left and right ends of the disposable frame 3 is fixed to the vertical frame 2 (first piece). It is directly fixed to the lower end portions of the first outside expected side 25 and the second outside expected side 26).

More specifically, in the second embodiment, two disposable frames 3 are provided that connect the lower end portions of the left and right vertical frames 2, and one of the disposable frames 3 is connected to the upper surface of the upper surface portion 30 of the long portion. Both end portions in the length direction abut the lower ends of the left and right vertical frames 2 (first inside expected surface 22, first outside expected side 25), and the first pieces (vertical pieces) 40 of the left and right end elements 4 The left and right first pieces (vertical pieces) 40 and the first outer side 25 are fixed with screws 6 while in contact with the vertical side formed by the first outside side 25 of the vertical frame 2. , the other disposable frame 3 has both ends in the length direction of the upper surface of the upper surface portion 30 of the elongated portion abutting the lower ends of the left and right vertical frames 2 (second inner prospective surface 23, second outer prospective side 26), While the first pieces (vertical pieces) 40 of the left and right end elements 4 are in contact with the vertical prospective surface consisting of the second outer prospective sides 26 of the left and right vertical frames 2, the left and right first pieces (vertical pieces) ) 40 and the second outer prospective side 26 are fixed with screws 6.

The fixing structure of the disposable frame according to the third embodiment will be described with reference to FIG. 6. The shapes of the left and right vertical frames 2 are similar to those in the first embodiment, and the description regarding the first embodiment can be referred to. In the first embodiment, the first pieces (vertical pieces) 40 at both the left and right ends of the two disposable frames 3 extending in parallel are brought into contact with the connecting elements 5 fixed to the lower end portions of the outer sides of the left and right vertical frames 2. In this state, the left and right first pieces (vertical pieces) 40 and the connecting element 5 are fixed with screws 6. However, in the third embodiment, one waste frame 3 is used to connect the left and right pieces of the waste frame 3. The vertical pieces 33 at both ends are fixed to connecting elements 5 fixed to the outer lower end portions of the vertical frame 2.

The disposable frame 3 is formed into a U-shape in cross section with a wide upper surface part 30, a first facing side 31 and a second facing side 32 hanging down from the upper surface part 30, and both ends in the length direction. A vertical piece 33 vertically rising from the end of the upper surface portion 30 is integrally formed on the upper surface portion 30 .

In the disposable frame 3, both ends in the length direction of the upper surface of the upper surface part 30 are connected to the left and right vertical frames 2 (the first inner prospective surface 22, the second inner prospective surface 23, the central prospective surface 240 of the central prospective part 24, and the first center The connecting element 5 is made of a connecting element 5 that abuts the lower ends of the finding surface 241 and the second central finding surface 242 and the lower end of the connecting element 5, and the left and right vertical pieces 33 are fixed to the outer lower end portions of the left and right vertical frames 2. The left and right vertical pieces 33 and the connecting element 5 are fixed with screws 6 while in contact with a vertical prospective surface.

A fixing structure for a disposable frame according to a fourth embodiment will be described with reference to FIG. 7. The shapes of the left and right vertical frames 2 are similar to those in the first embodiment, and the description regarding the first embodiment can be referred to. The sacrificial frame 3 according to the fourth embodiment is similar to the sacrificial frame 3 according to the third embodiment, but in the fourth embodiment, the vertical pieces 33 at both left and right ends of the sacrificial frame 3 are It is directly fixed to the lower end portion of the expected side 25 and the second outer expected side 26).

The disposable frame 3 is formed into a U-shape in cross section with a wide upper surface part 30, a first facing side 31 and a second facing side 32 hanging down from the upper surface part 30, and both ends in the length direction. A vertical piece 33 vertically rising from the end of the upper surface portion 30 is integrally formed on the upper surface portion 30 . The projected dimensions of the disposable frame 3 (width dimensions of the upper surface portion 30) are approximately the same as the projected dimensions of the vertical frame 2.

In the disposable frame 3, both ends in the length direction of the upper surface of the upper surface part 30 are connected to the left and right vertical frames 2 (the first inner prospective surface 22, the second inner prospective surface 23, the central prospective surface 240 of the central prospective part 24, and the first center The left and right vertical pieces 33 are in contact with the lower ends of the facing surface 241, the second central facing surface 242, the first outer projected edge 25, and the second outer projected edge 26), and the left and right vertical pieces 33 are in contact with the first outer projected edges of the left and right vertical frames 2. 25. Fix the left and right vertical pieces 33, the first outer prospective side 25, and the second outer prospective side 26 with the screws 6 while in contact with the vertical prospective surface of the lower end portion of the second external prospective side 26. It will be done.

The fixing structure of the disposable frame according to the fifth embodiment will be described with reference to FIG. 8. The shapes of the left and right vertical frames 2 are similar to those in the first embodiment, and the description regarding the first embodiment can be referred to. In the first to fourth embodiments, the sacrificial frame 3 has left and right first pieces (vertical pieces) 40 at both ends in the length direction, and vertical pieces 33 at the lower end portions outside the left and right vertical frames 2 (connection elements). 5. Fix the left and right first pieces (vertical pieces) 40 and vertical pieces 33 and the lower end portion of the outer side with the screws 6 while in contact with the first outer side prospective side 25 and the second outer side prospective side 26). However, in the fifth embodiment, the left and right vertical pieces 40 at both ends in the length direction are fixed to the inner lower end portions of the left and right vertical frames 2.

The disposable frame 3 consists of an elongated portion and end elements 4 fixed to both lengthwise ends of the elongated portion. The elongated portion is formed into a U-shape in cross section from an upper surface portion 30 and a first facing side 31 and a second facing side 32 that hang down from the upper surface portion 30. The length dimension of the elongated portion is the same as the width dimension of the three-sided frame (the dimension between the outer surfaces of the left and right vertical frames 2).

The end element 4 has an L shape with a vertical first piece 40 and a horizontal second piece 41, and the lower surface of the second piece 41 is fixed to the upper surface of the upper surface part 30 (by welding, screwing, etc.). ), and the first piece 40 forms a vertical piece that stands up vertically from both longitudinal ends of the elongated portion (portions slightly deviated inward from both end edges).

Two disposable frames 3 are provided to connect the lower end portions of the left and right vertical frames 2, and one of the disposable frames 3 is connected to both ends in the length direction of the upper surface of the upper surface portion 30 of the elongated portion (the outer side of the first piece 40). ) are in contact with the lower ends of the left and right vertical frames 2 (first inner expected surface 22, first outer expected side 25), and the first pieces (vertical pieces) 40 of the left and right end elements 4 are The left and right first pieces (vertical pieces) 40 and the first inner prospect surface 22 are fixed with screws 6 while in contact with a vertical prospect surface consisting of the first inner prospect surface 22 of the vertical frame 2. , the other disposable frame 3 has both ends in the length direction of the upper surface of the upper surface portion 30 of the elongated portion (portions located outside the first piece 40) on the left and right vertical frames 2 (second inner prospective surface 23, 2), and the first piece (vertical piece) 40 of the left and right end elements 4 abuts the vertical expected surface consisting of the second inner expected surface 23 of the left and right vertical frame 2. In this state, the left and right first pieces (vertical pieces) 40 and the second inner facing surface 23 are fixed with screws 6. Although FIG. 8 shows two disposable frames 3 connecting the lower end portions of the left and right vertical frames 2, as a modification of the fifth embodiment, one disposable frame with a wide upper surface ( (see the disposable frame 3 shown in FIG. 7) is provided with four end elements (two end elements each at both ends in the length direction), and the first piece (vertical piece) 40 of the left and right end elements 4 is The left and right first pieces (vertical pieces) 40 and the first inner prospect surface 22 are fixed with screws 6 while in contact with the vertical prospect surface consisting of the first inner prospect surface 22 of the vertical frame 2. With the first piece (vertical piece) 40 of the end element 4 in contact with the vertical prospective surface consisting of the second inner prospective surface 23 of the left and right vertical frames 2, the left and right first pieces (vertical piece) 40 and the second inner prospective surface 23 may be fixed with screws 6.

A fixing structure for a disposable frame according to a sixth embodiment will be described with reference to FIG. 9. The shapes of the left and right vertical frames 2 are similar to those in the first embodiment, and the description regarding the first embodiment can be referred to. Similarly to the fifth embodiment, the left and right vertical pieces 40 at both lengthwise ends of the disposable frame 3 are fixed to the inner lower end portions of the left and right vertical frames 2.

The disposable frame 3 consists of an elongated portion and end elements 4 fixed to both lengthwise ends of the elongated portion. The elongated portion is formed into a U-shape in cross section from an upper surface portion 30 and a first facing side 31 and a second facing side 32 that hang down from the upper surface portion 30. The length of the long part is slightly longer than the dimension between the inner surfaces (first inner surface 22, second inner surface 23) of the left and right vertical frames 2, and the width dimension of the three-sided frame (left and right (dimension between the outer surfaces of the vertical frame 2).

The end element 4 has an L shape with a vertical first piece 40 and a horizontal second piece 41, and the lower surface of the second piece 41 is fixed to the upper surface of the upper surface part 30 (by welding, screwing, etc.). ), and the first piece 40 forms a vertical piece that stands up vertically from both longitudinal ends of the elongated portion (parts close to both end edges), and there are slight edges on the outside of the left and right first pieces 40. The upper surface portion 30 is exposed, and the lower end of the vertical frame 2 (first inner side surface 22, second inner side surface 23) comes into contact with this exposed surface.

Two disposable frames 3 are provided to connect the lower end portions of the left and right vertical frames 2, and one of the disposable frames 3 is connected to both ends in the length direction of the upper surface of the upper surface portion 30 of the elongated portion (the outer side of the first piece 40). ) are in contact with the lower ends of the left and right vertical frames 2 (first inside prospective surfaces 22), and the first pieces (vertical pieces) 40 of the left and right end elements 4 are in contact with the first inside sides of the left and right vertical frames 2. With the left and right end elements 4 in contact with the vertical prospect surface consisting of the prospect surface 22 and with one end edge of the left and right end elements 4 in contact with the first central prospect surface 241 of the left and right vertical frame 2, the left and right first A piece (vertical piece) 40 and a first inner prospecting surface 22 are fixed with screws 6, and the other disposable frame 3 is formed by fixing a piece (vertical piece) 40 and a first inner prospective surface 22 to each other. (portions located on the outside of 2, and with one end edge of the left and right end elements 4 in contact with the second center facing surface 242 of the left and right vertical frame 2, the left and right The first piece (vertical piece) 40 and the second inner prospective surface 23 are fixed with screws 6. In the fixing structure of the sacrificial frame according to the sixth embodiment, one end edge of the end element 4 comes into contact with the first central facing surface 241 or the second central facing surface 242, so that the rotation around the axis of the screw 6 is prevented. It can also respond well to deformation.

As described above, in this embodiment, the disposable frame 3 is formed in a rising shape at both longitudinal ends with both longitudinal ends of the upper surface portion 30 in contact with the lower ends of the left and right vertical frames 2. The left and right vertical pieces (the first piece 40, the vertical piece 33) are connected to the vertical prospective surfaces of the lower end portions of the left and right vertical frames 2 (the connecting element 5, the first external prospective side 25, the second external prospective side 26, Since a temporary four-periphery frame is formed by fixing to the first inner prospective surface 22 and second inner prospective surface 23) with screws 6, the four-peripheral frame deforms against rotation and twisting acting on the four-peripheral frame. The stable shape of the four-frame frame can be maintained during transportation from the factory to the site and during loading.

In fixing the end element 4 to the long part 3A of the disposable frame 3, the edge of the second piece 41 of the end element 4 is connected to the inner surface of the first facing side 31 and the second facing side 32 of the long part 3A. In the case where the edge of the second piece 41 contacts the inner surface of the first facing side 31 and the second facing side 32, Deformation around the axis of the screw 6 can also be accommodated well.

The door frame, which consists of three sides, is delivered to the site as a temporary four-side frame. Specifically, in a factory, a three-sided frame consisting of an upper frame 1 and left and right vertical frames 2 is assembled, and a disposable frame 3 as a lower frame is fixed to the lower end portions of the left and right vertical frames 2. Assemble the four-frame frame. The door frame is carried to the site as a four-circumference frame, the disposable frame 3 is removed at the site, and a three-sided door frame consisting of an upper frame 1 and left and right vertical frames 2 is attached to the opening. Since the fixing structure of the sacrificial frame 3 according to this embodiment uses the screws 6, it is easy to remove the sacrificial frame 3 at the site, and it can also be used at sites where hot work is not possible.

1 Upper frame 2 Vertical frame 20 First sight surface 21 Second sight surface 22 First inside sight surface 23 Second inside sight surface 24 Center sight portion 240 Center sight surface 241 First center sight surface 242 Second center sight surface Attachment surface 25 First outside expected side 26 Second outside expected side 3 Disposable frame 3A Elongated portion 30 Top surface portion 31 First found side 32 Second found side 33 Vertical piece 4 End element 40 First piece (vertical piece )
41 Second piece 5 Connection element 6 Screw

Claims (5)

The lower end portions of the left and right vertical frames of the three-sided frame consisting of the upper frame and the left and right vertical frames are connected by at least one disposable frame,
The disposable frame consists of an elongated portion extending in the width direction of the three-sided frame, and left and right vertical pieces formed in a rising shape at both end portions in the length direction of the elongated portion,
The disposable frame is such that both longitudinal ends of the elongated portion are in contact with the lower ends of the left and right vertical frames, and the left and right vertical pieces are in contact with the outer lower end portions of the left and right vertical frames, The left and right vertical pieces and the lower end portion are fixed with screws ,
Fixed structure of disposable frame. The left and right vertical frames have a first facing surface, a second facing surface, an inner facing surface connecting the inner ends of the first facing surface and the second facing surface, and an outer side of the first facing surface. A first outer prospect side extending from the end in the prospect direction, and a second outer prospect side extending from the outer end of the second prospect surface in the prospect direction,
A connecting element is provided for connecting the lower end portions of the first outer prospective side and the second outer prospective side,
The connecting element has a vertical surface, and the left and right vertical pieces are fixed to the connecting element by screws while in contact with the vertical surface of the connecting element.
A fixing structure for a disposable frame according to claim 1 . The long portion of the disposable frame is formed into a U-shape in cross section from an upper surface portion, and a first facing side and a second facing side depending from the upper surface portion,
L-shaped end elements are fixed to both lengthwise ends of the elongated portion, including a first vertical piece and a second horizontal piece;
Both longitudinal ends of the upper surface of the elongated portion are in contact with the lower ends of the left and right vertical frames, and the first pieces of the end elements form the left and right vertical pieces.
The fixing structure for a disposable frame according to any one of claims 1 and 2 . The end element is fixed to the lower surface of the upper surface part with the edge of the second piece in contact with or close to the inner surface of the first found side and the second found side.
A fixing structure for a disposable frame according to claim 3 . The lower end portions of the left and right vertical frames of the three-sided frame consisting of the upper frame and the left and right vertical frames are connected by at least one disposable frame,
The disposable frame consists of an elongated portion extending in the width direction of the three-sided frame, and left and right vertical pieces formed in a rising shape at both end portions in the length direction of the elongated portion,
The disposable frame is arranged such that both ends in the length direction of the elongated portion are in contact with the lower ends of the left and right vertical frames, and the left and right vertical pieces are in contact with the lower end parts of the left and right vertical frames. The vertical piece and the lower end part are fixed with screws,
The long portion of the disposable frame is formed into a U-shape in cross section from an upper surface portion, and a first facing side and a second facing side depending from the upper surface portion,
L-shaped end elements are fixed to both lengthwise ends of the elongated portion, including a first vertical piece and a second horizontal piece;
Both longitudinal ends of the upper surface of the elongated portion are in contact with the lower ends of the left and right vertical frames, and the first pieces of the end elements form the left and right vertical pieces.
Fixed structure of disposable frame.

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