JP6878830B2 - Steel member manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a steel frame member for manufacturing a steel frame member having a plurality of through holes formed in a web.

When a steel frame member such as H-shaped steel is used in a place where wiring or piping is passed, such as a ceiling, a wall, or an underfloor of a building, a steel frame member having a through hole 5 formed in the web 2 as shown in FIG. 1 may be used. At the location where the through hole 5 is formed, the strength of the web 2 is reduced due to the cross-sectional defect. In the following Patent Documents 1 and 2 and the like, it is proposed to attach a reinforcing member around the through hole 5 to secure the strength of the web 2.

Japanese Unexamined Patent Publication No. 6-93683 Japanese Unexamined Patent Publication No. 2011-63331

In order to form a plurality of through holes 5 in the web 2 and attach a reinforcing member around the through holes 5, a considerable number of man-hours are required, which increases the manufacturing cost.

The present invention has been made to solve the above problems, and an object of the present invention is to reduce the man-hours required for forming a plurality of through holes and ensuring the strength of the web, and to reduce the manufacturing cost. To provide a manufacturing method.

In the method for manufacturing a steel frame member according to the present invention, a longitudinal first plate portion, a second plate portion joined to one end in the width direction of the first plate portion, and the other end in the width direction of the first plate portion are joined. A material shaped steel having a formed third plate portion and extending the second and third plate portions so that the width direction of the second and third plate portions intersects with the width direction of the first plate portion. Preparation Steps, a first intermediate in which the first plate portion of the material shaped steel is cut along a line extending in the longitudinal direction of the first plate portion, and has a second plate portion and a first cut piece, and a third. An intermediate manufacturing step for manufacturing a second intermediate having a plate and a second cut, and a first so that the first and second cuts are offset from each other in the width direction of the second and third plates. The first plate portion includes a joining step in which the first and second intermediates are arranged, the tip of the first cut piece is joined to the third plate portion, and the tip of the second cut piece is joined to the second plate portion. The line to be cut is a line that passes through the center position in the width direction of the first plate portion and the first position between the second plate portion and the second position between the center position and the third plate portion a plurality of times. By cutting the first plate portion along the line, a plurality of cutout portions are formed in the first and second cut pieces, respectively, and the cutout portions of the first and second cut pieces overlap each other in the joining step. As described above, the first and second intermediates are arranged so as to be offset in the longitudinal direction of the first and second intermediates.

According to the method for manufacturing a steel frame member of the present invention, the first and second intermediates are arranged so as to be offset in the longitudinal direction of the first and second intermediates so that the cutout portions of the first and second cut pieces overlap each other. , The first and second intermediates are arranged so that the first and second cut pieces are displaced from each other in the width direction of the second and third plates, and the tip of the first cut piece is placed on the third plate. Since the tip of the second cut piece is joined to the second plate portion at the same time as joining, it is possible to form a plurality of through holes and secure the strength of the web at the same time. As a result, the man-hours required for forming a plurality of through holes and ensuring the strength of the web can be reduced, and the manufacturing cost can be reduced.

It is a side view which shows the steel frame member manufactured by the steel frame member manufacturing method by embodiment of this invention. It is sectional drawing of the steel frame member along the line AA of FIG. It is explanatory drawing which shows the steel frame member manufacturing method which manufactures the steel frame member of FIG. It is explanatory drawing which shows the 1st modification of the steel frame member manufacturing method of FIG. It is explanatory drawing which shows the 2nd modification of the steel frame member manufacturing method of FIG. It is explanatory drawing which shows the 3rd modification of the steel frame member manufacturing method of FIG. It is explanatory drawing which shows the 4th modification of the steel frame member manufacturing method of FIG. It is explanatory drawing which shows the 5th modification of the steel frame member manufacturing method of FIG. It is explanatory drawing which shows the 1st use example of the steel frame member of FIG. It is explanatory drawing which shows the 2nd use example of the steel frame member of FIG. It is a perspective view which shows the conventional steel frame member.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1.
FIG. 1 is a side view showing a steel frame member 1 manufactured by the steel frame member manufacturing method according to the embodiment of the present invention, and FIG. 2 is a cross-sectional view of the steel frame member 1 along the line AA of FIG. As shown in FIGS. 1 and 2, the steel frame member 1 of the present embodiment has a web 2, a lower flange 3, and an upper flange 4.

The web 2, the lower flange 3, and the upper flange 4 are joined to each other so that the cross-sectional shape is H-shaped as a whole. That is, the lower flange 3 are joined to one end in the width direction W _W of the web 2 (bottom), the upper flange 4 is joined to the other end (upper end) in the width direction W _W of the web 2. Lower flange 3 and upper flange 4 has a width direction W _F thereof under the flange 3 and upper flange 4 is extended to intersect the width direction W _W of the web 2. It is preferable that the width direction W _F in the width direction W _W and the lower flange 3 and upper flange 4 of the web 2 are orthogonal to each other.

The web 2 has a first web board 21 and a second web board 22. The first web plate 21 includes a plurality of side view trapezoidal plate portions 21a arranged side by side in the longitudinal direction L of the web 2 and a plurality of notched portions 21b formed between the plate portions 21a. The second web plate 22 includes a plurality of side view inverted trapezoidal plate portions 22a arranged side by side in the longitudinal direction L of the web 2 and a plurality of notched portions 22b formed between the plate portions 22a. .. In FIG. 1, in order to make it easy to identify the overlap of the plate portions 21a and 22a of the first and second web plates 21 and 22, the plate portions 21a and 22a are shaded with diagonal lines. The same applies to FIGS. 3 and 6 to 8 below.

In the steel frame member 1 of the present embodiment, the plate portions 21a of the first web plate 21 are arranged apart from each other in the longitudinal direction L of the web 2, and are connected to each other via the lower flange 3 and the upper flange 4. Has been done. Similarly, the plate portions 22a of the second web plate 22 are arranged apart from each other in the longitudinal direction L of the web 2, and are connected to each other via the lower flange 3 and the upper flange 4.

As particularly evident in FIG. 2, the first and second webs plates 21 and 22 are arranged offset from each other in the width direction W _F of the lower flange 3 and upper flange 4. Further, the first and second web plates 21 and 22 are arranged so that the cutout portions 21b and 22b of the first and second web plates 21 and 22 overlap each other. The cutout portions 21b and 22b of the first and second web plates 21 and 22 that are overlapped with each other in this way form a plurality of through holes 5 formed in the web 2. The plurality of through holes 5 of the present embodiment are hexagonal in side view, and are arranged at equal intervals in the longitudinal direction L of the web 2.

Next, FIG. 3 is an explanatory view showing a method for manufacturing the steel frame member 1 for manufacturing the steel frame member 1 of FIG. The steel frame member manufacturing method of the present embodiment includes a preparation step ((a) in FIG. 3), an intermediate manufacturing step ((b) in FIG. 3), and a joining step ((c) and (d) in FIG. 3). Includes.

In the preparation step, the material shaped steel 10 shown in FIG. 3A is prepared. The material shaped steel 10 has a web 11 (first plate portion), a lower flange 3 (second plate portion), and an upper flange 4 (third plate portion). The web 11, the lower flange 3, and the upper flange 4 are long plate members, and are joined to each other so that the cross-sectional shape is H-shaped as a whole. That is, the lower flange 3 are joined to one end in the width direction W _w of the web 11 (the lower end), the upper flange 4 is joined to the other end in the width direction W _w of the web 11 (the upper end). Lower flange 3 and upper flange 4 has a width direction W _F thereof under the flange 3 and upper flange 4 is extended to intersect the width direction W _w of the web 11. It is preferable that the width direction W _F in the width direction W _w and the lower flange 3 and upper flange 4 of the web 11 are orthogonal to each other.

As shown on the right side of a front view of (a) in FIG. 3, the web 11 is lower at a position shifted from the center position 3c of the lower flange 3 in the first direction with respect to the width direction W _F of the lower flange 3 and upper flange 4 is joined to the flange 3, it is preferably joined to the upper flange 4 at a position shifted in the second direction opposite the first direction from the center position 4c of the upper flange 4 with respect to the width direction W _F. The reason will be explained later.

In the intermediate manufacturing step, the web 11 of the material shaped steel 10 is cut along the line 12 (broken line in (a) of FIG. 3) extending in the longitudinal direction L of the web 11, and the first web 11 shown in FIG. 3 (b) is cut. The intermediate 13 and the second intermediate 14 are manufactured.

As shown by the broken line in (a) of FIG. 3, lines 12 to cut the web 11 of the material shape steel 10, the first between the center position W _C and the lower flange 3 in the width direction W _W of the web 11 position P _1, and a second position P ₂ between its center position W _C and the upper flange 4 through a plurality of times, respectively.

The steel member fabricating method of this embodiment, the first and second positions P _1, P _2, respectively from the center position W _C in the width direction W _W of the web 11 towards the lower flange 3 and upper flange 4 the web 11 It is a position separated by 1/2 of the width of the lower flange 3 and is in contact with the upper surface of the lower flange 3 and the lower surface of the upper flange 4.

With respect to the longitudinal direction L of the web 11, the line 12 is the position and the line 12 passing through the first position P ₁ is spaced apart from the position passing through the second position P _2. In other words, the line 12, a first linear portion 12a through the first position _{P 1,} and a second linear portion 12b through the second position _{P 2} is provided, first in the longitudinal direction L of the web 11 1 The straight line portion 12a and the second straight line portion 12b are separated from each other. The first and second straight lines 12a and 12b are connected by a diagonal line 12c. A plurality of shaded portion 12c located at a distance from each other in the longitudinal direction L of the web 11, to draw a letter of "C", the inclined orientation with respect to the width direction W _W of the web 11 is alternated.

As shown in FIG. 3B, the first intermediate body 13 has a lower flange 3 and a first cut piece 111. The first cut piece 111 is a portion that will later become the first web plate 21 in FIG. 1, and is between a plurality of side view trapezoidal plate portions 21a arranged side by side in the longitudinal direction L of the web 11 and each plate portion 21a. Includes a plurality of notches 21b formed in.

Further, as shown in FIG. 3B, the second intermediate body 14 has an upper flange 4 and a second cutting piece 112. The second cut piece 112 is a portion that will later become the second web plate 22 in FIG. 1, and is a plurality of side view inverted trapezoidal plate portions 22a and each plate portion 22a arranged side by side in the longitudinal direction L of the web 11. It includes a plurality of notches 22b formed between them.

In the joining step, the positional relationship between the first and second intermediates 13 and 14 is adjusted as shown in FIG. 3C. The positional relationship between the first and second intermediates 13 and 14 in the joining step is as follows. That is, as shown in the right-hand front view of (c) in FIG. 3, first as the first and second cut pieces 111 and 112 are positioned offset from each other in the width direction W _F of the lower flange 3 and upper flange 4 The 1st and 2nd intermediates 13 and 14 are arranged. Further, as shown in the left side view of FIG. 3C, when the first and second intermediates 13 and 14 are brought close to each other, the cutout portions 21b and 22b of the first and second cut pieces 111 and 112 are formed. The first and second intermediates 13, 14 are arranged so as to be offset from each other in the longitudinal direction L of the first and second intermediates 13, 14.

Further, in the joining step, after adjusting the positional relationship between the first and second intermediates 13 and 14 as described above, as shown in FIG. 3D, the first cut piece 111 of the first intermediate 13 The tip (tip of the plate portion 21a) is joined to the upper flange 4, and the tip of the second cutting piece 112 of the second intermediate 14 (tip of the plate portion 22a) is joined to the lower flange 3.

By going through these preparation steps, intermediate body manufacturing steps, and joining steps, the steel frame member 1 of FIG. 1 is manufactured from the material shaped steel 10. A plurality of through holes 5 are formed by overlapping the cutout portions 21b and 22b of the first and second cut pieces 111 and 112. Further, by disposing shifting the first and second cut pieces 111 and 112 in the width direction _{W F} of the lower flange 3 and upper flange 4, that the first and second webs plates 21 and 22 constituting the web 2 The strength of the web 2 is improved as compared with the case where a plurality of through holes are provided in the web of a single plate. That is, by adopting the positional relationship between the first and second intermediates 13 and 14 as described above in the joining step, it is possible to collectively form the plurality of through holes 5 and secure the strength of the web 2. If the through hole 5 is formed by punching or the like, scrap (punched scrap) is generated, but the steel frame member manufacturing method of the present embodiment can avoid the generation of such scrap. In relation to avoiding the generation of scrap, the weight of the steel frame member 1 can be made substantially equal to the weight of the material shaped steel 10.

As shown in the front view on the right side of FIG. 3A, in the material shaped steel 10 which is the material of the steel frame member 1, the lower flange 3 and the upper flange 4 are positioned at positions deviated from the central positions 3c and 4c. by the flange 3 and web 11 in the upper flange 4 is joined, offset from each other in the width direction W _F the first and second cut pieces 111 and 112 as shown by the front view of the right shown in FIG. 3 (c) After joining the tips of the first and second cut pieces 111 and 112 to the upper flange 4 and the lower flange 3 in this state, the first and second web plates 21 and 22 (first and second cut pieces 111 and 112). The central position between them can be matched to or closer to the central positions 3c and 4c of the lower flange 3 and the upper flange 4. In other words, the amount of deviation of the web 11 from the center positions 3c and 4c of the lower flange 3 and the upper flange 4 in the material shaped steel 10 is based on the assumed separation distance of the first and second web plates 21 and 22 in the steel frame member 1. Can be set.

Next, FIG. 4 is an explanatory view showing a first modification of the steel frame member manufacturing method of FIG. As shown in FIG. 4, the separation distance between the first and second web plates 21 and 22 may be widened so that the cross section of the steel frame member 1 approaches the closed cross section or is made into a closed cross section. In the steel frame member 1 shown in FIG. 4, the first and second web plates 21 and 22 are lower in the region QR from the ends of the lower flange 3 and the upper flange 4 to 1/4 of the width of the lower flange 3 and the upper flange 4. It is joined to the flange 3 and the upper flange 4. By increasing the separation distance between the first and second web plates 21 and 22, the durability of the first and second web plates 21 and 22 against lateral buckling can be improved. Other configurations are the same as those of FIG.

Next, FIG. 5 is an explanatory view showing a second modification of the steel frame member manufacturing method of FIG. By using the material shaped steel 10 in which the lips 3a and 4a are formed on the lower flange 3 and the upper flange 4, the steel frame member 1 made of the shaped steel with a lip as shown in FIG. 5 can also be manufactured. Other configurations are the same as those of FIG. This second modification can be carried out in combination with the first modification.

Next, FIG. 6 is an explanatory view showing a third modified example of the steel frame member manufacturing method of FIG. In the configuration of FIG. 3, with respect to the longitudinal direction L of the web 11 of the material shape steel 10, and the position of the line 12 to cut the web 11 passes through position and the second position P ₂ passing through the first position P ₁ is spaced apart from each other It has been described as have, even if the line 12 in the longitudinal direction L of the web 11 as shown in FIG. 6 is the position and the line 12 passing through the first position P ₁ overlap position with each other through the second position P ₂ Good. In other words, it may not be separated from each other with respect to the longitudinal direction L of the second straight portion 12b and a web 11 which passes through a first linear portion 12a passes through the first position P ₁ and the second position P _2. If the line 12 is the position and the line 12 passing through the first position P ₁ overlap one another and a position through the second position P ₂ with respect to the longitudinal direction L of the web 11, a plurality which are spaced apart in the longitudinal direction L of the web 11 is of the hatched portion 12c, so as to draw a character of "Bruno", are inclined in the same direction with respect to the width direction W _W of the web 11. Each through hole 5 is a parallelogram when viewed from the side. Other configurations are the same as those of FIG. This third modification can be carried out in combination with the first and second modifications.

Next, FIG. 7 is an explanatory view showing a fourth modified example of the steel frame member manufacturing method of FIG. In the configuration of FIG. 3, with respect to the longitudinal direction L of the web 11 of the material shape steel 10, and the position of the line 12 to cut the web 11 passes through position and the second position P ₂ passing through the first position P ₁ is spaced apart from each other has been described as have, a line 12 as shown in FIG. 7 the position and the line 12 passing through the first position P ₁ and the position through the second position P ₂ is located adjacent to one another in the longitudinal direction L of the web 11 May be good. That is, similarly to the third modification, a second linear portion 12b which passes through the first linear portion 12a passes through the first position P ₁ and the second position P ₂ is not be separated from each other with respect to the longitudinal direction L of the web 11 May be good. At this time, the first linear portion 12a and the second linear portion 12b, are linked by a third straight portion 12d along the width direction _{W W} of the web 11. Each through hole 5 is a rectangular or square side view. Other configurations are the same as those of FIG. This fourth modification can be carried out in combination with the first and second modifications.

Next, FIG. 8 is an explanatory view showing a fifth modification of the steel frame member manufacturing method of FIG. In the configuration of FIG. 3, the first and second positions _P 1, _{P 2} through a line 12 to cut the web 11 of the material shape steel 10, and the lower flange 3 from the center position _{W C} in the width direction _{W W} of the web 11 respectively toward the upper flange 4 have been described as being at a distance of only 1/2 of the width of the web 11, the first and second positions P ₁ as shown in FIG. _8, and P ₂ and the center position W _C The distance between may be changed. The distance between the first position P ₁ and the center position W _C is equal to the distance between the second position P ₂ and the center position W _C. If these distances are larger than 1/4 of the width of the web 11, the cutout portions 21b and 22b of the first and second cut pieces 111 and 112 can be overlapped with each other to form a plurality of through holes 5. By changing these distances, the steel frame member 1 having a different ratio of the height to the width (the width of the web to the width of the flange) can be manufactured from the same material shaped steel 10. In the steel frame member 1 shown in FIG. 8, the widths of the flanges 3 and 4 are the same as those of the steel frame member 1 of FIG. 1, but the width of the web 2 is narrower than that of the steel frame member 1 of FIG. This fifth modification can be carried out in combination with the first to fourth modifications.

Next, FIG. 9 is an explanatory view showing a first usage example of the steel frame member 1 of FIG. As shown in FIG. 9, the steel frame member 1 of FIG. 1 can be used as a ceiling member that supports the roof base 6 of a building. The through hole 5 can be used for passing wiring or the like.

Next, FIG. 10 is an explanatory view showing a second use example of the steel frame member 1 of FIG. As shown in FIG. 10, the steel frame member 1 of FIG. 1 can be used as an outer wall base member that supports the outer wall material 7 of a building and an inner wall base member that supports the inner wall material 8. The through hole 5 can be used as a ventilation hole for passing wiring or the like and for ensuring air permeability. The steel frame member 1 of FIG. 1 can be appropriately used for applications other than the first and second usage examples.

In such a steel frame member manufacturing method, the first and second intermediates 13, 14 are placed on the first and second intermediates 13, so that the cutouts 21b, 22b of the first and second cut pieces 111, 112 overlap each other. with offset arrangement in the longitudinal direction L of the 14, first and second intermediate as the first and second cut pieces 111 and 112 are positioned offset from each other in the width direction W _F of the lower flange 3 and upper flange 4 Since 111 and 112 are arranged and the tip of the first cutting piece 111 is joined to the upper flange 4 and the tip of the second cutting piece 112 is joined to the lower flange 3, a plurality of through holes 5 are formed and the web 2 is formed. It is possible to secure the strength collectively. As a result, the man-hours required for forming the plurality of through holes 5 and ensuring the strength of the web 2 can be reduced, and the manufacturing cost can be reduced.

Further, the first and second positions _P 1, _{P 2} each web 11 towards the lower flange 3 and upper flange 4 from the center position _{W C} of the web 11 through the line 12 to cut the web 11 of the material shape steel 10 Since the positions are separated by 1/2 of the width, a larger through hole 5 can be formed and the width of the web 2 of the manufactured steel frame member 1 can be made wider.

Further, only the first and respectively the same distance towards the lower flange 3 and upper flange 4 from the center position W _C of the second position P _1, P ₂ the web 11 through which a line 12 to cut the web 11 of the material shape steel 10 Since the steel frame member 1 which is located at a distant position and has a different height ratio to the width is manufactured from the material shaped steel 10 by changing this distance, many kinds of steel frame members 1 can be manufactured from the same material shaped steel 10. The manufacturing cost of the steel frame member 1 can be reduced. Further, even if the steel frame members 1 have different ratios of height to width, the weights of the steel frame members 1 can be made equal.

Furthermore, a line 12 for cutting the web 11 of the material shape steel 10 in the longitudinal direction of the web 11 of the material shape steel 10 and the position where the position and the line 12 passing through the first position P ₁ passing through the second position P ₂ to one another Since they are separated from each other, a hexagonal through hole 5 in a side view can be formed in the web 2 of the steel frame member 1.

Further, overlapping lines 12 to cut the web 11 of the material shape steel 10 in the longitudinal direction of the web 11 of the material shape steel 10 and the position where the position and the line 12 passing through the first position P ₁ passing through the second position P ₂ to one another Therefore, the through hole 5 having a parallelogram in the side view can be formed in the web 2 of the steel frame member 1.

Furthermore, longitudinal lines 12 to cut the web 11 of the material shape steel 10 with respect to an adjacent position and a line 12 passing through the first position P ₁ and a position passing through the second position P ₂ to each other of the web 11 of the material shape steel 10 Therefore, a rectangular or square through hole 5 in a side view can be formed in the web 2 of the steel frame member 1.

1 Steel member 2 Web 3 Lower flange (2nd plate)
4 Upper flange (3rd plate)
5 Through hole 10 Material Shaped steel 11 Web (1st plate part)
111 1st cut piece 112 2nd cut piece 12 wire 13 1st intermediate 14 2nd intermediate 21b, 22b Notch

Claims (7)

A longitudinal first plate portion, a second plate portion joined to one end in the width direction of the first plate portion, and a third plate portion joined to the other end in the width direction of the first plate portion. A preparatory step for preparing a material shaped steel having the second and third plate portions extending so that the width direction of the second and third plate portions intersects with the width direction of the first plate portion.
A first intermediate body obtained by cutting the first plate portion of the material shaped steel along a line extending in the longitudinal direction of the first plate portion and having the second plate portion and the first cut piece, and the third plate portion. An intermediate manufacturing step for manufacturing a second intermediate having a plate portion and a second cut piece, and the first and second cut pieces are positioned so as to be offset from each other in the width direction of the second and third plate portions. A joining step is performed in which the first and second intermediates are arranged, the tip of the first cut piece is joined to the third plate portion, and the tip of the second cut piece is joined to the second plate portion. Including
The line for cutting the first plate portion is a first position between the center position in the width direction of the first plate portion and the second plate portion, and between the center position and the third plate portion. It is a line that passes through the second position of the above a plurality of times, and by cutting the first plate portion along the line, a plurality of notched portions are formed in the first and second cut pieces, respectively.
In the joining step, the first and second intermediates are arranged so as to be offset in the longitudinal direction of the first and second intermediates so that the cutout portions of the first and second cut pieces overlap each other.
Steel member manufacturing method. The first and second positions are positions separated from the central position toward the second and third plate portions by 1/2 of the width of the first plate portion, respectively.
The method for manufacturing a steel frame member according to claim 1. The first and second positions are positions separated from the central position toward the second and third plate portions by the same distance, respectively.
Steel members having different height ratios to widths are manufactured from the material shaped steel by changing the distance.
The method for manufacturing a steel frame member according to claim 1. Any one of claims 1 to 3 in which the position where the line passes through the first position and the position where the line passes through the second position are separated from each other in the longitudinal direction of the first plate portion. The method for manufacturing a steel frame member described in the section. Any one of claims 1 to 3 in which the position where the line passes through the first position and the position where the line passes through the second position overlap each other with respect to the longitudinal direction of the first plate portion. The method for manufacturing a steel frame member described in 1. Any one of claims 1 to 3 in which the position where the line passes through the first position and the position where the line passes through the second position are adjacent to each other in the longitudinal direction of the first plate portion. The method for manufacturing a steel frame member described in the section. In the material shaped steel, the first plate portion is joined to the second plate portion at a position deviated from the central position of the second plate portion in the first direction with respect to the width direction of the second and third plate portions. , Is joined to the third plate portion at a position deviated from the central position of the third plate portion in the second direction opposite to the first direction in the width direction.
The method for manufacturing a steel frame member according to any one of claims 1 to 6.

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