JPH09325U - Fixing structure of steel material for wall panel attachment to structural frame - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] When fixing a steel material for mounting a wall panel to a structural body, upward welding, which requires skill from the outside of the structure, is unnecessary, and construction is performed only by downward welding from inside the structure. Is possible. In addition, a scaffold for welding assembled on the outside of the structure is unnecessary. A steel material 4 for mounting a wall panel, which is composed of a horizontal flange 2 and a vertical flange 3, is fixed to a steel frame beam 1 serving as a structural body. Using a steel material 4 provided with a notch 9 having a cut surface at a position slightly forward of the center of the front-rear width of the flange 2,
The cut surface of the notch 9 and the upper surface of the steel beam 1 are welded downward from the inside of the structure, and the rear edge of the lateral flange 2 and the upper surface of the steel beam 1 are welded downward from the inside of the structure. To do.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a structure for fixing a steel material for mounting a wall panel to a structural body such as a steel frame beam or a steel frame column.

[0002]

[Prior art]

 As a conventional attachment structure for a lightweight cellular concrete wall panel (hereinafter referred to as an ALC wall panel), a structure shown in FIGS. 3 and 4 is generally used. That is, on the upper surface of a steel frame beam 1 as a structural frame, a steel material 4 having an L-shaped cross section composed of a horizontal flange 2 and a vertical flange 3 is placed so that the vertical flange 3 protrudes slightly toward the front, and the horizontal flange 2 A fillet weld is formed between the rear edge and the upper surface of the steel beam 1 to form a welded portion A, and a fillet weld is performed between the lower surface of the lateral flange 2 and the front edge of the steel beam 1 to form a welded portion B 2. By forming, the steel material 4 is welded and fixed to the steel beam 1. In this structure, the vertical flange 3 of the steel material 4 serves as a ruler surface for mounting a wall panel and also as a mounting surface for a panel fixing metal fitting (not shown).

As is well known, the reason for forming the welded portion A and the welded portion B at the two positions in the front-rear direction as described above is that the downward force applied to the steel material 4 (by the load of the ALC wall panel 8 or the like). This is to prevent the steel material 4 from coming off regardless of the direction of the force and the upward force (the force generated during an earthquake). In this specification, the front direction of the ALC wall panel 8 is “front” and the back direction of the ALC wall panel 8 is “rear”.

[0004]

[Problems to be solved by the device]

 Since the welding of the steel material 4 to the steel beam 1 is performed at the construction site of the structure, the welding strength thereof largely depends on the skill of the welding operator at the construction site. Here, even in the case of on-site welding, the welded portion A can be welded downward from the inside of the structure, which has the best weldability. It is possible to secure a uniform and sufficient welding strength commensurate with the design strength, which is unlikely to cause personal effects.

However, with respect to the welded portion B, in the case of field welding in which the steel beam 1 cannot be moved, there is no choice but to perform upward welding, which has the worst weldability, so that the welding operation is difficult and the welding operator It was difficult to secure a uniform and sufficient welding strength commensurate with the design strength. Further, since the welded portion B is welded from the outside of the structure, there is also a problem that a scaffold for welding work must be assembled outside the structure.

Japanese Utility Model Publication No. 58-19219 discloses a technique of welding and fixing a guide plate having an L-shaped cross section to a structural body at the edge portion and both side edge portions of the lateral flange. In this technique, the welded portions at both end edges of the guide plate correspond to the welded portion B. However, since there are always two edge portions on both ends of the guide plate, when the design strength is high, sufficient welding strength equivalent to the weld portion B cannot be obtained only by these two welding portions. As a manifestation of this, the guide plate of the publication is exclusively for guiding the left and right slides of the support plate, and is used so that the load of the ALC wall panel is not applied. Therefore, this technology can be applied only in limited cases where the design strength is low.

[0007]

[Means for Solving the Problems]

 The present invention has a structure in which a steel material for attaching a wall panel having an L-shaped cross section, which is composed of a horizontal flange and a vertical flange, is fixed to a structural body, and at least at a middle portion in the longitudinal direction of the rear edge of the horizontal flange. Using a steel material with one notch recessed, the steel material is placed on the upper surface of the structural body at its lateral flange, and the notch is placed inside the upper surface of the structural body, while the lower surface of the lateral flange is placed on the structural body. Of the cutout and the upper surface of the structural body are welded downward from the inside of the structure, and the rear edge of the lateral flange and the upper surface of the structural body are welded downward. The feature is that the space is welded downward from the inside of the structure.

Here, the number of notches can be appropriately determined according to the length of the steel material, design strength, etc. If the steel material is short and the design strength is low, one notch may be sufficient. However, when the steel material is long and the design strength is high, it is common to provide a plurality of notches at intervals.

[0009]

[Action]

 Between the cut surface of the cutout and the upper surface of the structural frame, and between the trailing edge of the lateral flange and the upper surface of the structural frame, even from a construction site where the structural frame cannot be moved, from inside the structure. Can be field-welded with the best weldability downward. The downward welding is easy for the welding work, is less likely to be affected by the welding operator personally, and ensures uniform and sufficient welding strength commensurate with the design strength. Further, in the present invention, it is not necessary to perform the upward welding between the lower surface of the lateral flange and the front edge of the structural body, which are conventionally welded upward from the outside of the structure. Since upward welding is a fairly difficult work and requires skill, the fact that it is not necessary is a great advantage in the construction field. Furthermore, the fact that there is no need to weld from outside the structure means that there is no need to build a welding scaffold outside the structure. This is also a big merit in the construction field.

Further, since the cutout portion is provided at an intermediate portion in the longitudinal direction of the lateral flange, the number of cutouts can be appropriately determined according to the length of the steel material, the design strength and the like. Therefore, even if the steel material is long and has high design strength, if the number of notches is appropriately increased and welding is performed as described above, sufficient welding strength commensurate with the design strength can be obtained.

[0011]

【Example】

 An embodiment will be described with reference to FIGS. 1 and 2. On the upper surface of the steel beam 1 as a structural frame, there is a steel material 4 having an L-shaped cross section consisting of a horizontal flange 2 and a vertical flange 3 from the edge of the bottom of the horizontal flange 2 to a position slightly beyond the center. The vertical flange 3 is slightly protruded from the steel beam 1 toward the ALC wall panel 8 side. The illustrated steel material 4 is generally called a through-angle.

The lateral flange 2 has a plurality of U-shaped cutouts that enter from the edge portion thereof to a portion slightly beyond the central portion (to a portion substantially overlapping the upper surface of the steel beam 1). 9 are provided at predetermined intervals in the longitudinal direction of the lateral flange 2. These notches 9 are set in the upper surface of the steel beam 1. Between the cut surfaces of these notches 9 and the upper surface of the steel beam 1, a flat C-shaped weld portion C is formed by performing fillet welding downward.

The reason why the cut surface 9x is formed in the notch 9 at a position slightly beyond the center of the front-rear width of the lateral flange 2 to the front side as described above is as follows. That is, the front-rear direction position of the cut surface 9x substantially coincides with the front-rear direction position of the portion where the lateral flange 2 overlaps the upper surface of the steel beam 1, and therefore the cut surface 9x and the upper surface of the steel beam 1 naturally. The front-rear direction position of the weld Cx in the weld C formed between the two is substantially the same as the front-rear position of the weld B in the conventional example shown in FIGS. 3 and 4. Therefore, with respect to the force applied to the steel material 4 as described in the section of the conventional technique, at least the welded portion Cx in the welded portion C functions as the welded portion B in the conventional example.

In addition to the welded portion C, a welded portion A is formed between the rear edge of the lateral flange 2 and the upper surface of the steel beam 1 by performing fillet welding in a downward direction.

The steel material 4 is welded and fixed to the steel beam 1 by the welded portion C and the welded portion A, and high welding strength is obtained.

Further, on the front surface of the vertical flange 3, a support plate 7 including a fixed flange 5 and a support flange 6 is welded and fixed at the fixed flange 5, and an ALC wall panel 8 is mounted on the support flange 6. While being placed, the ALC wall panel 8 is fixed to the vertical flange 3 of the steel material 4 by a fixing metal fitting (not shown).

According to the embodiment configured as described above, even if the steel beam 1 cannot be moved, the welded portion C and the welded portion A are all faced downward with the best weldability. Since it is possible to perform on-site welding, the welding work is easy and the individual influence of the welding operator is unlikely to occur, and it is possible to secure a uniform and sufficient welding strength commensurate with the design strength.

Since the steel material 4 can be reliably welded and fixed to the steel beam 1 by the welded portion C and the welded portion A as described above, the lower surface of the lateral flange 2 and the steel beam 1 can be fixed as in the conventional case. It is not necessary to form the welded portion B by welding upward from the outside of the structure between the front edge of the structure and the front edge of the structure, and therefore, it is not necessary to form a scaffold outside the structure. As a result, the ALC wall panel 8 can be securely and safely attached via the support plate 7 and the like.

The present invention is not limited to the configuration of the above-described embodiment, and may be embodied by being appropriately modified, for example, as follows, without departing from the spirit of the invention. (1) The size and shape of the cutout 9 and the interval between the cutouts 9 when a plurality of cutouts are provided are determined according to the size of the steel material 4, the weight of the ALC wall panel 8, and the like. You can (2) In particular, the shape of the notch 9 may be a plane triangle, a plane semicircle, a plane U-shape, or the like. (3) Further, when a plurality of cutouts are provided, the intervals between the cutouts 9 do not have to be all constant, and can be arbitrarily changed.

[0020]

[Effect of the invention]

 Since the structure for fixing the steel material for mounting the wall panel to the structural body of the present invention is configured as described above, it does not require upward welding that requires skill from the outside of the structure, only by downward welding from inside the structure. Enables construction. Therefore, the welding work becomes easy, the uniform and sufficient welding strength commensurate with the design strength can be secured, and the wall panel can be securely and safely attached. Furthermore, it is not necessary to construct a scaffold for welding outside the structure. These are great benefits in the construction field. Further, even when the steel material is long and has high design strength, if the number of notches is appropriately increased and welding is performed as described above, sufficient welding strength commensurate with the design strength can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment embodying the present invention.

FIG. 2 is a sectional view of an essential part of the same embodiment.

FIG. 3 is a perspective view showing a conventional example.

FIG. 4 is a sectional view of an essential part of a conventional example.

[Explanation of symbols]

 1 Steel beam as structural frame 2 Horizontal flange 3 Vertical flange 4 Steel material 8 ALC wall panel 9 Notch part A Weld part C Weld part

Claims (1)

[Utility model registration claims] 1. A structure for fixing a steel material for mounting a wall panel having an L-shaped cross section, which is composed of a horizontal flange and a vertical flange, to a structural body, at least at a middle portion in a longitudinal direction of a rear edge of the horizontal flange. Using a steel material in which one notch is recessed, the steel material is placed on the upper surface of the structural body at its lateral flange, and the notch is housed within the upper surface of the structural body while the lower surface of the lateral flange is placed at the structural body. While protruding from the inside of the structure between the cut surface of the cutout portion and the upper surface of the structural body, the space between the trailing edge of the lateral flange and the upper surface of the structural body is A structure for fixing a steel material for mounting a wall panel to a structural body characterized by being welded downward from inside the structure.