JPH0686004B2 - Panel box manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a panel box for joining steel columns used in a steel structure building or the like on the way.

[0002]

2. Description of the Related Art As shown in FIG.
A steel frame column of various shapes surrounded by four sides is used for. For example, in the steel column 17a at the corner of the building, two surfaces in contact with the outer wall are vertical surfaces 18 and 18, and the other two surfaces are inclined surfaces 19 and 19. As the steel column 17b used for the portion forming the window, one surface in contact with the outer wall is a vertical surface 18 and the other is a sloped surface 19,
Those of 19, 19 are adopted. Further, a steel frame column 17c having four slopes 19, 19, 19, 19 is adopted in the other parts of the building. Steel columns 17a, 17b, 1
7c becomes thinner toward the upper part of the building, but since it is difficult to form them with a single pillar, as shown in the figure, the panel boxes 1a, 1b that connect the upper and lower steel frame pillars,
1c is used. In the figure, the panel box 1a
Although only one etc. is displayed, it is not limited to this. 9 to 11 show panel boxes 1a, 1b, 1c.
The steel column 17a. It is formed of one having a vertical surface 18 and / or a sloped surface 19 substantially similar to 17b and 17c.

In order to manufacture the panel box 1a and the like, a division type manufacturing method has been conventionally used. That is, as shown by a chain double-dashed line in FIGS. 9 to 11, the panel box 1a or the like is divided into two along the dividing lines 20, 20, 20, and a cut plate obtained by flattening it is cut and formed. A manufacturing method has been adopted in which a pair of U-shaped cutting plates are bent to form a U-shape, the pair of U-shaped cutting plates are aligned in a box shape, and the alignment positions are welded. Further, as a further advanced manufacturing method, a method has been adopted in which a back metal is applied to the above-mentioned alignment position and the back metal and the cutting plate are welded.

[0004]

Recently, high-rise buildings have become widespread, and higher buildings are required. For that purpose, the steel columns used for it are required to withstand high-rise buildings sufficiently. In this case, the strength of the welded portion becomes a problem particularly in the panel box 1a or the like in which the cut plates are welded together. If there are pinholes, etc. in the welded part, the welding strength will decrease. Therefore, the welded part is subjected to a pinhole inspection by X-ray etc. If the welded part has more than the allowable value, the steel structure will not be accepted. It is said that However, in the above-described conventional panel box manufacturing method, a relatively large number of objects fail the pinhole inspection, which has been a problem.

The present invention solves the above problems, and significantly reduces the defect rate of a welded portion due to pinhole inspection by X-rays and the like, and is a method of manufacturing a panel box which can be implemented relatively easily. The purpose is to provide.

[0006]

In order to achieve the above-mentioned object, the present invention is a method for manufacturing a box-shaped panel box in which four surfaces are surrounded by vertical surfaces and / or inclined surfaces and which are open at the top and bottom. A first step in which the panel box is divided into two and flattened, and a cutting plate is cut into a contour shape in which projecting portions are formed above and below both end edges of the panel box; and a second step in which the cutting plate is bent into a U-shape. A third step in which both ends of a pair of the U-shaped bent plates are aligned to form a box-like shape and a back metal is brought into contact with the matching position, and the protrusion and the back metal are tightened. It comprises a fourth step of welding a back metal to the cutting plate side, a fifth step of welding a position where the end edges of the cutting plate are aligned with each other, and a sixth step of cutting and removing the protruding portion and the back metal welded thereto. Is characterized by.

[0007]

Operation: The completed panel box is divided into two flat parts, and the cut plate is cut into a contour shape in which protruding portions are formed above and below both end edges. The cut plate is bent in a U shape, and a pair of cut plates bent in the U shape are formed into a box-like shape by aligning both end edges thereof. The back metal is applied to the matching position, and the back metal is welded to the cutting plate with the back metal and the protruding portion tightened. After that, the alignment position of the cutting plate is welded, and the panel box is completed by cutting and removing the unnecessary protrusion and the backing metal that abuts on the protrusion. Through the above steps, the welding of the cut plate alignment positions is completed, and the occurrence of pinholes is greatly reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the panel box 1c shown in FIG. 11 will be described, but the same applies to the panel boxes 1a and 1b having other shapes, and the description thereof will be omitted. FIG. 1 is a drawing showing a panel box 1 formed by the manufacturing method of this embodiment, and FIGS. 2 to 7 are drawings for explaining the first to sixth steps of this embodiment.

The manufacturing method of the present embodiment includes cutting, bending,
Back metal tightening, back metal welding, cutting plate side welding, unnecessary part (protruding part)
It consists of 6 steps of cutting and removing, and the steps will be sequentially described below.

(First Step) The panel box 1c shown in FIG. 11 is divided into two parts at the two-point diagonal lines and flatly developed, and the cut plate 3 having the protrusions 2 formed at the upper and lower ends of the panel box is shown. Shown in 2. That is, the cut plate 3 includes a slope 3a or 3d corresponding to one slope of the panel box 1c, and slopes 3b connected to both sides of the slope 3a or 3d (FIG. 11).
3c has a contoured shape in which a portion corresponding to approximately ½ surface is flatly developed, and protrusions 2 having appropriate lengths are formed above and below the positions of the end edges 4 and 4 of the inclined surface portions 3b and 3c. The first step is to cut the pair of cutting plates 3 and 3 having the contour shape shown in FIG.

(Second Step) The second step is the step of bending the cutting plate 3 shown in FIG. 2 along the bending lines 5 and 5 and bending it into the U-shape shown in FIG.

(Third step) A pair of cutting plates 3, 3 bent in a U-shape are formed into a box-like shape with the edges 4, 4 on both sides thereof being close to each other. In this case, as shown in FIG. 3, a slight gap 6 for welding is provided between the edges 4 and 4 facing each other.
Is formed. That is, the cutting plates 3 and 3 are cut and formed so as to match the shape of the finished product of the panel box 1 in a state of being fitted in a box shape with a gap 6 therebetween. A back metal 7 having a width dimension that closes at least the gap 6 is brought into contact with the position where the edges 4 and 4 are aligned. As shown in FIGS. 4 and 5, the back metal 7
The third step is to tighten the projecting portion 2 and the projecting portion 2 with the tightening tool 8. The tightening tool 8 is not limited to that shown in the drawings, but for example, the contact plate 9 that contacts the backing plate 7, the screw shaft 10 that connects one end side to the contact plate 9, and the other end side of the screw shaft 10 are fixed. Arm 11 that holds the handle 11, the contact plate 12 that contacts the protrusion 2 side, the contact plate 12 and the screw shaft 10, and that has the female screw part (not shown) with which the screw shaft 10 is screwed. Etc. By rotating the handle 11, the contact plate 9
And 12 are pressed against the back metal 7 and the protrusion 2 to tighten them.

(Fourth Step) The fourth step is a step of welding the back metal 7. In the third step, the backing metal 7 and the upper and lower protruding portions 2 are pressed and engaged by the tightening tool 8, so that the backing metal 7 comes into close contact with the cutting plate 3 side. In that state, the back metal 7 is welded to the side of the cutting plate 3 by spot welding or the like as shown in the figure. Of course, full-scale welding may be used instead of spot welding. By welding the backing plate 7 to the side of the cutting plate 3, the end edges 4, 4 of the cutting plate 3, 3 bent in a U-shape
4 is firmly held with the gap 6 maintained.

(Fifth Step) As shown in FIG. 6, the edges 6 and 4 of the pair of bent cutting plates 3 and 3 are welded while the gap 6 is filled with welding beads. As described above, since the edges 4 and 4 of the pair of cutting plates 3 and 3 are firmly held by the back metal 7, the portions of the edges 4 and 4 can be welded reliably and relatively easily. Since the bead 14 reaches the back metal 7 side as well, the cutting plates 3 and 3 including the protruding portion 2 are completely welded. The above is the fifth step.

(Sixth Step) The above-mentioned protruding portion 2 securely tightens the backing metal 7 and the side of the cutting plate 3, but is not necessary for the panel box 1 itself. Further, in general, when butt welding is performed, welding is likely to be incomplete on the weld end side. Therefore, welding may be incomplete at the ends (upper and lower ends) of the protrusion 2. From the above, the sixth
By cutting the protruding portion 2 in the process, the portion of the backing metal 7 welded to the protruding portion 2 is also cut, and the reference numeral 1 in FIG.
Since the portion corresponding to 5 is completely welded, this portion is completely welded as compared with the conventional welding.

As described above, FIG. 1 shows the first to sixth steps.
1 shows a panel box 1 manufactured by the process. The panel box 1 is reinforced at the fitting position by the back metal 7, and the above-mentioned steps allow almost complete welding of the respective parts. As a result, the occurrence of pinholes is greatly reduced, and the defect rate due to pinhole inspection by X-ray or the like is greatly reduced.

As described above, in the present embodiment, the panel box 1c shown in FIG. 11 has been described, but the panel boxes 1a and 1b having other shapes can be manufactured by the same manufacturing process. 1b
Can be manufactured.

[0018]

According to the present invention, the following effects can be obtained. (1) A protruding part is formed on the cutting plate, and the backing metal is welded to the cutting plate side with the back metal and the protruding part tightened. Therefore, the pair of bent cutting plates is sure to have a shape close to the completed shape of the panel box. Be connected. In that state, since the same edge of the cutting plate is welded, the welding is performed almost completely. From the above, welding defects such as pinholes hardly occur. (2) Since no welding defects occur, the defective rate of pinhole inspection by X-rays is greatly reduced. (3) By forming the projecting portion, the welded portions on the upper and lower open end sides of the panel box are reliably welded, and the welding strength is greatly improved compared to the conventional one. (4) Even if the protrusions are formed on the cut plate, the number of cutting steps in the cutting step (first step) hardly increases, and since the area covered by the protrusions is small, the material cost hardly increases. (5) Although the step of removing and removing the protruding portion (sixth step) is increased,
Even in the case of the conventional manufacturing method, a step of removing the welding debris on the upper and lower end surfaces by a grinder or the like is necessary after welding, and the number of special manufacturing steps does not increase.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall structure of a panel box manufactured according to an embodiment of the present invention.

FIG. 2 is a plan view showing a cutting plate cut in a first step of the same example.

FIG. 3 is a perspective view for explaining a second step of the same embodiment.

FIG. 4 is a partial perspective view for explaining third and fourth steps of the same embodiment.

FIG. 5 is a partial side view for explaining third and fourth steps of the same embodiment.

FIG. 6 is a partial perspective view for explaining the fifth step of the embodiment.

FIG. 7 is a partial side view for explaining the sixth step of the same example.

FIG. 8 is a partial perspective view showing a general structure and a panel box of steel frame columns of various shapes used in a building.

FIG. 9 is a perspective view showing a conventional panel box having two vertical surfaces, two vertical surfaces, and an inclined surface.

FIG. 10 is a perspective view of a conventional panel box having one vertical surface and three inclined surfaces.

FIG. 11 is a perspective view of a conventional panel box having a four-sided perspective view.

[Explanation of symbols]

 1 Panel Box 1a Panel Box 1b Panel Box 1c Panel Box 2 Projection Part 3 Cutting Plate 4 End Edge 5 Bending Line 6 Gap 7 Back Metal 8 Tightening Tool 9 Contact Plate 10 Screw Shaft 11 Handle 12 Contact Plate 13 Arm Part 14 Bead

Claims (1)

[Claims] 1. Surrounding four surfaces by vertical surfaces and / or inclined surfaces,
1. A method of manufacturing a box-shaped panel box having an opening at the top and bottom, the first step of cutting the cutting board into a contour shape in which the panel box is divided into two and flattened, and projecting portions are formed above and below both end edges thereof. , Bending the cutting plate into a U-shape
Step 3 and tightening the protrusion and the back metal together by making the box-like shape by aligning both end edges of the pair of U-shaped bent plates and abutting the back metal at the matching position.
A step, a fourth step of welding the back metal to the side of the cutting plate, a fifth step of welding the matching position of the edge of the cutting plate, and a sixth step of cutting and removing the protrusion and the back metal welded to the protruding portion. A method of manufacturing a panel box, comprising: