JP6815951B2 - Manufacturing method of H-section steel for beams with beam-column joint structure - Google Patents

Description

The present invention relates to a method for manufacturing an H-beam for a beam having a column- beam joint structure of a column and a steel structure having a column and a beam for setting a yield point at a beam portion away from the column .

A beam-column joint structure has been proposed to which a so-called RBS method (Reduced Beam Section Connections), in which a yield point is set at a portion away from the beam-column joint, is applied.

Patent Document 1 has a beam-column joint structure in which a notch is provided in a beam flange plate, and Patent Document 2 has a beam-column joint structure in which a notch is formed in a reinforcing plate at a position away from the column. Have been proposed respectively.

Japanese Unexamined Patent Publication No. 2006-002505 Japanese Unexamined Patent Publication No. 2002-08912

Such a beam-column joint structure is designed to prevent ductile fracture or brittle fracture at the beam-column joint due to the external force when a large external force is applied due to an earthquake or the like.

However, in the beam-column joint structure in the patent document, it is necessary to widen the beam width to secure an allowable value in order to prevent the beam flange plate from breaking on the column surface. As a result, it becomes necessary to widen the column width, and there is room for further improvement that economic design becomes difficult.

The present invention has been made in view of the above points, and an object of the present invention is to secure the strength of the welded portion at the end of the beam without having to greatly widen the width of the flange plate, and to increase the column cross section. there is no need to pillars enables economic design, moreover, that it is possible to prevent the ductility fracture or brittle fracture occurs in the beam-column joints by seismic force, to enable you to maintain a desired bending strength of the beam It is an object of the present invention to provide a method for manufacturing an H-shaped steel for a beam having a beam-joined structure.

To explain the beam-column joint structure of H-shaped steel for beams by the manufacturing method of the present invention, a column having a column surface extending in the vertical direction and a beam extending in the horizontal direction are referred to as a beam surface of the column. It is a beam-column joint structure in which one end in the longitudinal direction of the beam is joined to each other, and one end of the beam is a web plate joined to the upper and lower flange plates and the facing surfaces of the upper and lower flange plates. Each of the upper and lower flange plates is provided with a flange plate bulging portion integrally provided at one end thereof in the longitudinal direction, and a width direction at a position separated from the flange plate bulging portion in the longitudinal direction. It is provided with at least one notch provided on both edges of the above, and each of the upper and lower flange plates is joined to the beam surface of the beam at one end together with the bulging portion of the flange plate, and the web plate is longitudinal. It is provided with a web plate bulge that is integrally provided at one end of the direction, and the web plate is joined to the pillar surface of the beam at one end together with the web plate bulge.

According to the Column junction structure, the respective upper and lower flanges plate at one end of the beam is joined to the cylindrical surface of the column at one end thereof with a flange plate bulging portion, the web plate in one end of the beam Since it is joined to the column surface of the column at one end together with the bulging part of the web plate, the strength of the welded part at one end of the beam can be secured without the need to greatly widen the width of the flange plate, and the column cross section is increased. It is not necessary to do so, economic design is possible, and it is possible to prevent ductile breakage and brittle breakage at the beam-column joint due to seismic force, and it is possible to maintain the desired bending strength of the beam.

In a preferred example of the beam-column joint structure, the flange plate bulges are provided on the facing surfaces of the upper and lower flange plates, and the web plate bulges are provided on both sides of one end of the web plate. There is.

In the beam-column joint structure, at least one notch in each of the upper and lower flange plates is provided at the same position in the longitudinal direction of both edges of the upper and lower flange plates in a preferable example.

In the method for producing an H-beam for a beam having a beam-column joint structure of the present invention, an upper and lower flange plates having faces facing each other and a web plate joined to the faces facing each other of the upper and lower flange plates are joined. The first step of preparing the H-shaped steel material for the beam provided, and the second step of forming the flange plate bulge by rolling on each of the facing surfaces of the upper and lower flange plates of the H-shaped steel material. The third step of forming notches on both widthwise edges of the upper and lower flange plates of the H-shaped steel material, which are separated from the flange plate bulge in the longitudinal direction, and both sides of the web plate of the H-shaped steel material. It is provided with a fourth step of forming the bulging portion of the web plate by rolling.

According to the method of the present invention, since the flange plate bulging portion, the notch, and the web plate bulging portion are formed by rolling, an H-shaped steel for a beam having a beam-column joint structure can be efficiently manufactured.

In a preferred example, the method of the present invention repeats the second, third and fourth steps in order to gradually form the flange plate bulge, notch and web plate bulge by rolling.

According to the present invention, it is possible to secure the strength of the welded portion at the end of the beam without having to greatly widen the width of the flange plate, it is not necessary to increase the cross section of the column, economic design is possible, and moreover, due to seismic force. column can be prevented that the ductile fracture or brittle fracture occurs at the junction, to provide a method of manufacturing H-shaped steel for the beams of the desired bending to enable you to maintain the strength beam junction structure of the beam obtain.

FIG. 1 is a side explanatory view of a preferred specific example of the present invention. FIG. 2 is an explanatory cross-sectional view taken along the line II-II shown in FIG. FIG. 3 is a side explanatory view of one end of the beam of the specific example shown in FIG. FIG. 4 is an explanatory cross-sectional view taken along the line IV-IV of one end of the beam shown in FIG. FIG. 5 is a plan explanatory view of one end of the beam shown in FIG. FIG. 6 is a perspective explanatory view of one end of the beam shown in FIG. FIG. 7 is a perspective explanatory view of a steel plate which is a material used for manufacturing a flange plate at one end of a beam of the present invention. FIG. 8 is an explanatory view of a manufacturing stage in a rolling mill in the manufacturing process of the flange plate of the present invention. 9 (a) is a flange plate material manufactured by a rolling mill in the flange plate manufacturing process of the present invention, and FIG. 9 (b) is an explanatory view of a flange plate manufactured from a flange plate material. is there. 10 (a) is a side explanatory view of the flange plate material shown in FIG. 9 (a), and FIG. 10 (b) is a side explanatory view of the flange plate shown in FIG. 9 (a). 11 (a) is a web plate material manufactured by a rolling mill in the web plate manufacturing process of the present invention, and FIG. 11 (b) is an explanatory view of a flange plate manufactured from the web plate material. is there. FIG. 12 is an explanatory view of another manufacturing method of the flange plate of the present invention. FIG. 13 is a perspective explanatory view of H-shaped steel, which is a material used for manufacturing one end of a beam of the present invention. FIG. 14 is an explanatory view of a manufacturing stage in a rolling mill in a manufacturing process using the material of the H-shaped steel shown in FIG. 13 at one end of the beam of the present invention. FIG. 15 is an explanatory view of another manufacturing stage in the rolling mill in the manufacturing process using the material of the H-section steel shown in FIG. 13 at one end of the beam of the present invention. FIG. 16 is an explanatory view of a material of one end of a beam manufactured by the rolling mill shown in FIGS. 14 and 15. FIG. 17 is an explanatory view of another rolling mill used for manufacturing using the material of the H-section steel shown in FIG. 13 at one end of the beam of the present invention. FIG. 18 is a front explanatory view of still another rolling mill used for manufacturing using the material of the H-section steel shown in FIG. 13 at one end of the beam of the present invention. FIG. 19 is an operation explanatory view of another rolling mill of FIG. 18 using the XIX-XIX line arrow cross section shown in FIG. FIG. 20 is an operation explanatory view of another rolling mill of FIG. 18 using the XIX-XIX line arrow cross section shown in FIG. FIG. 21 is a front explanatory view of still another rolling mill used for manufacturing using the material of the H-section steel shown in FIG. 13 at one end of the beam of the present invention. FIG. 22 is a front explanatory view of still another rolling mill used for manufacturing using the material of the H-section steel shown in FIG. 13 at one end of the beam of the present invention.

Next, an embodiment of the present invention will be described in more detail based on a preferred specific example shown in the figure. The present invention is not limited to these examples.

In FIGS. 1 to 6, in the beam-column joint structure 1, a column 3 of a square column having a column surface 2 extending in the vertical direction V and a beam 4 extending in the horizontal direction H are formed on the column surface 2 of the column 3. And one end portion 5 of the longitudinal direction A in the horizontal direction H of the beam 4 are joined to each other by welding.

In addition to the one end portion 5, the beam 4 is connected to the one end portion 5 via a connecting mechanism 6 at one end portion 7 in the longitudinal direction A and extends in the horizontal direction H, and the main body portion 8 and the longitudinal length of the main body portion 8. The other end (not shown) of the direction A is connected via a connecting mechanism equivalent to the connecting mechanism 6, and the other end (not shown) similar to the one end 5 is provided. Similar to the part 5 joined to the column surface 2 of the column 3 by the column-beam joining structure 1, the same as the column-beam joining structure 1 at the other end of the column (not shown) adjacent to the column 3. It is joined with a beam-column joint structure.

One end 5 of the beam 4 includes upper and lower flange plates 11 and 12 and a web plate 14 joined to the facing surfaces 13 of the flange plates 11 and 12.

Each of the flange plates 11 and 12 is integrally provided on the surface 13 of one end portion 21 in the longitudinal direction A and one edge portion 22 of the longitudinal direction A of the one end portion 21, and is long in the horizontal direction H. A crescent shape formed on both edges of a flange plate bulging portion 23 extending in the width direction B orthogonal to the direction A and one end portion 21 at a position separated from the flange plate bulging portion 23 in the longitudinal direction A in the width direction B. The notches 24 and 25 of the above are integrally connected to the other edge of the one end portion 21 in the longitudinal direction A at one edge of the longitudinal direction A, and the trapezoidal intermediate portion 26 and the intermediate portion in a plan view. It is integrally connected to the other edge of the longitudinal direction A of 26 by one edge of the longitudinal direction A, and is formed at the other end 27 and the other end 27 which are narrower than the one end 21. A plurality of bolt holes 28 are provided, and each of the flange plates 11 and 12 is joined to the pillar surface 2 of the pillar 3 at one end portion 21 together with the flange plate bulging portion 23 by welding.

A web plate 14 having a width extending in the longitudinal direction A with the same width in the vertical direction V and having both sides 32 composed of vertical faces is integrally provided on both sides 32 at one end 31 thereof in the longitudinal direction A. A web plate bulging portion 33 extending in the vertical direction V and a plurality of bolt holes 35 formed at other end portions 34 in the longitudinal direction A are provided, and the web plate 14 has a web plate bulging portion. Together with 33, one end portion 31 thereof is joined to the pillar surface 2 of the pillar 3 by welding.

The main body 8 is formed on the upper and lower flange plates 41 and 42 having the same width as the other end 27 of the flange plates 11 and 12 in the width direction B, and the surfaces 43 and 44 of the flange plates 41 and 42 facing each other. It is provided with a web plate 45 that is joined and has a width in the vertical direction V that is the same width as the web plate 14.

The connecting mechanism 6 straddles the other end 27 of the flange plate 11 and one end 51 of the flange plate 41 in the longitudinal direction A in the longitudinal direction A, and is placed on the upper surface of the other end 27 and one end 51 of the flange plate 11. The splice plate 53, which is contacted and attached via the bolt-nut 52 and the bolt hole 28, straddles the other end 27 of the flange plate 11 and one end 51 of the flange plate 41 in the longitudinal direction A in the longitudinal direction A. In addition, in the width direction B, the other end 34 of the web plate 14 and one end 54 of the web plate 45 in the longitudinal direction A are sandwiched between the other end 27 of the flange plate 11 and the lower surface of the one end 51, and the bolts are in contact with each other. -A pair of splice plates 55 attached via a nut 52 and a bolt hole 28, the other end 27 of the flange plate 12 and one end 61 of the flange plate 42 in the longitudinal direction A, straddling the flange in the longitudinal direction A. A splice plate 63 attached via a bolt-nut 62 and a bolt hole 28 in contact with the lower surface of the other end 27 and one end 61 of the plate 12, and the other end 27 of the flange plate 12 and the flange plate 42. Other than the flange plate 12 that straddles one end 61 in the longitudinal direction A in the longitudinal direction A and sandwiches the other end 34 of the web plate 14 and one end 54 in the longitudinal direction A of the web plate 45 in the width direction B. A pair of splice plates 65 attached via bolts-nuts 62 and bolt holes 28 in contact with the upper surfaces of the end 27 and one end 61, the other end 34 of the web plate 14 and one end of the web plate 45. The web plate 14 straddles 54 in the longitudinal direction A.
A pair of splice plates 72 attached via bolts-nuts 71 and bolt holes 35 in contact with each of the side surfaces of the other end 34 and both sides of the one end 54 of the web plate 45. doing.

According to the above-mentioned beam-column joint structure 1, the upper and lower flange plates 11 and 12 at one end 5 of the beam 4 are welded to the column surface 2 of the column 3 at one end 21 together with the flange plate bulging portion 23. Since the web plate 14 at one end 5 of the beam 4 is joined to the pillar surface 2 of the pillar 3 at one end 31 together with the web plate bulge 33 by welding, the flange plates 11 and 12 are joined. It is possible to secure the strength of the welded portion 5 of one end portion 5 of the beam 4 without having to greatly widen the width in the width direction B, it is not necessary to increase the cross section of the square column, economic design is possible, and the flange plate 11 and the flange plate 11 and In addition to the one end portion 21 which is wider than the other end portion 27, each of the twelve has notches formed on both edges in the width direction B of the one end portion 21 at a position separated from the flange plate bulging portion 23 in the longitudinal direction A. Since 24 and 25 are provided, ductile fracture and brittle fracture occur at the joint between one end 21 of each of the flange plates 11 and 12 which are the beam-column joints and the column surface 2 of the beam 3 due to the seismic force. This can be prevented and the desired bending strength of the beam 4 can be maintained.

Hereinafter, a method of manufacturing the one end portion 5 of the beam 4 will be described.

First, the long rectangular steel plate 81 shown in FIG. 7, which is the material of the flange plates 11 and 12, is prepared, and the steel plate 81 is rotated in the R1 direction about the axis 83 of the rolling mill 82 shown in FIG. Repeatedly passes between a pair of rollers 84 and 85 for rolling in direction B and a pair of rollers 87 and 88 for rolling in the thickness direction by rotating in the R2 direction around the axis 86 (orthogonal to the paper surface of FIG. 8). (Move in the direction C (see FIG. 12)), and in each of the repeated passages, correspond to one end 21, the notch 24 and 25, the middle 26 and the other 27 of the flange plates 11 and 12, respectively. One end 91, notches 92 and 93, intermediate 94 and other end 95 are formed by pressing contact of the annular surfaces 96 and 97 of the pair of rollers 84 and 85 with the outer edges 98 and 99 of the steel plate 81 in the width direction B. As described above, the pair of rollers 84 and 85 are separated from each other and brought close to each other with respect to the width direction B, while the roller 87 passes through a portion of the steel plate 81 between the pair of rollers 87 and 88 other than the intermediate portion 101 in the longitudinal direction A. The roller 88 is brought closer to the thickness direction T, which is a direction orthogonal to the longitudinal direction A, so that the cylindrical surfaces 102 and 103 of the pair of rollers 87 and 88 are placed on the surfaces 104 and 105 of the steel plate 81, respectively. A bulging portion 106 corresponding to the bulging portion 23 of the flange plate is formed on one surface 105 of the steel plate 81 when the intermediate portion 101 of the steel plate 81 is passed between the pair of rollers 87 and 88 in the longitudinal direction. Therefore, the roller 88 is separated from the roller 87 with respect to the thickness direction T, and the cylindrical surfaces 102 and 103 of the pair of rollers 87 and 88 are pressed into contact with the surfaces 104 and 105 of the steel plate 81, respectively, to bring the rolling mill. The flange plate material 111 shown in FIGS. 9A and 10A after being formed on the steel sheet 81 by 82 is press-cut or laser-cut at the center 112 in the longitudinal direction A. The two flange plates 113 shown in FIGS. 9 and 10 (b) are formed. Each of the two flange plates 113 is used as the flange plate 11 or 12 of the one end portion 5 of the beam 4.

Further, a long rectangular steel plate similar to the steel plate 81 shown in FIG. 7 is prepared as a material for the web plate 14, and such a long rectangular steel plate is prepared in the same manner as the steel plate 81 by a pair of rolling mills 82 shown in FIG. Rollers 84 and 85 and the pair of rollers 87 and 88 are repeatedly passed, and in each of the repeated passages, the positions of the pair of rollers 84 and 85 with respect to the width direction B are kept constant, and the pair of rollers 84 and While maintaining pressure contact with both edges of the steel plate, which is the material of the web plate 14 of the annular surfaces 96 and 97 of 85, in the width direction B, a portion other than the intermediate portion in the longitudinal direction of the steel plate, which is the material of the web plate 14. When passing between the pair of rollers 87 and 88, the rollers 87 and 88 are brought close to each other in the thickness direction T, and the cylindrical surfaces 102 and 103 of the pair of rollers 87 and 88 are made of the material of the web plate 14. When the steel plate is brought into pressure contact with each other on both sides and the intermediate portion in the longitudinal direction of the steel plate is passed between the pair of rollers 87 and 88, the bulging portion 121 corresponding to the web plate bulging portion 33 of the web plate 14 is concerned. In order to form on both sides of the steel sheet, the rollers 87 and 88 are separated from each other in the thickness direction T, and the cylindrical surfaces 102 and 103 of the pair of rollers 87 and 88 are pressed against each of both sides of the steel sheet and rolled. The web plate material 122 shown in FIG. 11 (a) after the bulging portion 121 is formed on the steel plate which is the material of the web plate 14 by the machine 82 is press-cut at the center 123 in the longitudinal direction A, and is shown in FIG. The two web plates 124 shown in (b) of 11 are formed. Each of the two web plates 124 is used as the web plate 14 at one end 5 of the beam 4.

The flange plate 113 and the web plate 124 formed as described above are welded to each other and assembled as one end portion 5 of the beam 4.

By the way, in the manufacture of the flange plates 11 and 12 using the rolling mill 82 shown in FIG. 8, one end 91, the notches 92 and 93, and the middle are used by using a pair of rollers 84 and 85 having annular surfaces 96 and 97, respectively. Although the portion 94 and the other end portion 95 are formed, instead of the pair of rollers 84 and 85, a pair of rollers 133 and 134 having annular surfaces 131 and 132 as shown in FIG. 12 may be used. Often, in this case, each of the annular surfaces 131 and 132 has a shape that matches the shapes of the surfaces 135 and 136 on both edges of the flange plate material 111 shown in FIG. 9A when unfolded. Similar to the pair of rollers 84 and 85, the long rectangular steel plate 81 shown in FIG. 7, which is the material of the flange plates 11 and 12, is repeatedly passed in the direction C between the pair of rollers 133 and 134 in the width direction B. In the repeated passage of the steel plate 81 in the direction C, the pair of rollers 133 and 134 are rotated in the R1 direction about the axis 83 and approach each other in the width direction B. There is.

In the above method of manufacturing one end 5 of the beam 4, the flange plate 113 and the web plate 124 are individually formed, and the individually formed flange plate 113 and the web plate 124 are welded to each other to weld one end of the beam 4. Although it is obtained as a portion 5, instead of this, an H-shaped steel 143 as an H-shaped steel material for the beam 4 provided with the pair of flange plates 141 and the web plate 142 shown in FIG. 13 is used in the beam 4. One end portion 5 of the beam 4 may be manufactured from H-shaped steel 143 by preparing as a material for the one end portion 5.

When one end 5 of the beam 4 is manufactured from the H-shaped steel 143, for example, a variable width rolling mill 151 as shown in FIGS. 14 and 15 is used. The variable width rolling mill 151 has a vertical roll 155 having a cylindrical outer peripheral surface 153 that presses and contacts the outer surface 152 of one flange plate 141 and rotates in the R1 direction about the axis 154, and the other flange plate 141. One of a vertical roll 165 having a cylindrical outer peripheral surface 163 that presses and contacts the outer surface 162 and that rotates in the R1 direction about the axis 164, and one that is divided in the width direction B by the web plate 142 of one flange plate 141. A horizontal roll 176 that has an annular side surface 172 that presses and contacts the inner surface 171 and a cylindrical outer peripheral surface 174 that presses and contacts one side surface 173 of the web plate 142 and that rotates in the R2 direction about the axis 175, and the other. It has an annular side surface 182 that presses and contacts one inner surface 181 divided in the width direction B by the web plate 142 of the flange plate 141 and a cylindrical outer peripheral surface 184 that presses and contacts one side surface 173 of the web plate 142. The horizontal roll 186 that rotates in the R2 direction together with the horizontal roll 176 about the axis 175 concentric with the axis 175 of the horizontal roll 176, and the other that is divided in the width direction B by the web plate 142 of one flange plate 141. A horizontal roll 196 that has an annular side surface 192 that presses and contacts the inner surface 191 and a cylindrical outer peripheral surface 194 that presses and contacts the other side surface 193 of the web plate 142 and that rotates about the axis 195 in the R2 direction, and the other. Each has an annular side surface 202 that presses and contacts the other inner surface 201 divided in the width direction B by the web plate 142 of the flange plate 141 and a cylindrical outer surface 204 that presses and contacts the other side surface 193 of the web plate 142. The horizontal roll 196 includes a horizontal roll 196 and a horizontal roll 206 that rotates in the R2 direction together with the horizontal roll 196 about the concentric axis 205, and the horizontal rolls 176 and 186 have an annular side surface 172 and an annular surface. The side surfaces 182 are juxtaposed so that the distance L1 in the width direction D of the web plate 142 and the distance L2 (L1> L2) narrower than the distance L1 can be changed in the width direction D, and the horizontal rolls 196 and 206 are arranged. Also, the annular side surface 192 and the annular side surface 202 are juxtaposed so that the distance L1 in the width direction D and the distance L2 (L1> L2) narrower than the distance L1 can be changed in the width direction D. , In addition, water The flat rolls 176 and 186 and the horizontal rolls 196 and 206 are juxtaposed so as to be movable in the thickness direction T so as to be able to approach and separate from each other.

When the one end portion 5 of the beam 4 is manufactured from the H-shaped steel 143 by such a variable width rolling mill 151, between the vertical roll 155 and the vertical roll 165 and the horizontal rolls 176 and 186 and the horizontal rolls 196 and 206. The H-shaped steel 143 is repeatedly inserted, and when passing through a portion of the H-shaped steel 143 other than the intermediate portion 211 in the longitudinal direction A in each of the repeated insertions, as shown in FIG. 14, the annular side surface 172 Horizontal rolls 176 and 186 and horizontal rolls 196 so that the distance between the and the annular side surface 182 in the width direction D and the distance between the annular side surface 192 and the annular side surface 202 in the width direction D are L1 respectively. The horizontal rolls 176 and 186 and the horizontal rolls 196 and 206 are separated from each other in the width direction D and the gaps between the outer peripheral surfaces 174 and 184 and the outer peripheral surfaces 194 and 204 in the thickness direction T are narrowed. When the H-shaped steel 143 is brought close to each other in the thickness direction T and passes through the intermediate portion 211 in the longitudinal direction A of the H-shaped steel 143, as shown in FIG. 15, the distance between the annular side surface 172 and the annular side surface 182 in the width direction D is large. Then, the horizontal rolls 176 and 186 and the horizontal rolls 196 and 206 are brought close to each other in the width direction D so that the distance between the annular side surface 192 and the annular side surface 202 in the width direction D is L2, respectively. As shown in FIG. 16, the horizontal rolls 176 and 186 and the horizontal rolls 196 and 206 are separated from each other in the thickness direction T so that the gap between the outer peripheral surfaces 174 and 184 and the outer peripheral surfaces 194 and 204 in the thickness direction T becomes wider. In addition, a bulging portion 212 corresponding to the bulging portion 23 of the flange plate is formed on each of the inner surfaces 171, 181, 191 and 201. The bulging portion 213 corresponding to the bulging portion 33 of the web plate is separated from both flange plates 141 in the width direction D by a rolling mill equivalent to the rolling mill 82 shown in FIG. 8 in the same manner as in the formation of the bulging portion 121. It is preformed in the central portion of each of the side surfaces 173 and 193.

For each of the flange plates 141 of the H-shaped steel 143 shown in FIG. 16 in which the bulging portions 212 and 212 are formed, for example, both edges 215 of the flange plates 141 of the pair of rollers 84 and 85 shown in FIG. And by repeatedly rolling by pressing contact with 216, a portion corresponding to each of the one end portion 21, the notch 24 and 25, the intermediate portion 26 and the other end portion 27 is formed, and such a portion is formed in the H shape. By cutting the steel 143 from the center 217 in the longitudinal direction A, one end 5 of the beam 4 can be obtained.

When the bulging portion 212 is formed by the variable width rolling mill 151 shown in FIG. 14, each of the bulging portions 212 expands toward the web plate 142, but the horizontal roll 176, the horizontal roll 186, and the horizontal roll Instead of the 196 and the horizontal roll 206, for example, in addition to the vertical roll 155 and the vertical roll 165 as shown in FIG. 17, the vertical conical outer peripheral surface 221 that presses and contacts one inner surface 171 of one flange plate 141. And an inclination that rotates in the R3 direction around an axis 223 that has a conical outer peripheral surface 222 that presses and contacts one side surface 173 of the web plate 142 and intersects the inner surface 171 and the side surface 173 at an angle of 90 °. It has a roll 224 and a conical outer surface 231 that presses against one inner surface 181 of the other flange plate 141 and a conical outer surface 232 that presses and contacts one side surface 173 of the web plate 142, and has an inner surface 181. And the inclined roll 234 that rotates in the R3 direction around the axis 233 that intersects the side surface 173 at an angle of 90 °, and the conical outer surface 241 that presses and contacts the other inner surface 191 of one flange plate 141. And an inclination that rotates in the R3 direction about an axis 243 that has a conical outer peripheral surface 242 that presses and contacts the other side surface 193 of the web plate 142 and intersects the inner surface 191 and the side surface 193 at an angle of 90 °. It has a roll 244 and a conical outer surface 251 that press-contacts the other inner surface 201 of the other flange plate 141 and a conical outer surface 252 that press-contacts the other side surface 193 of the web plate 142, and has an inner surface 201. And an inclined roll 254 that rotates in the R3 direction about an axial center 253 that intersects the side surface 193 at an angle of 90 °, and the inclined roll 224 is orthogonal to the axial center 223 and has an inner surface 171 and a side surface. In the direction E that intersects 173 at an angle of 90 °, the inclined roll 234 is orthogonal to the axis 233 and in the direction F that intersects the inner surface 181 and the side surface 173 at an angle of 90 °, the inclined roll 244 In a direction G that is orthogonal to the axis 243 and intersects the inner surface 191 and the side surface 193 at an angle of 90 °, and the tilt roll 254 is orthogonal to the axis 253 and 90 with respect to the inner surface 201 and the side surface 193. Using a variable width rolling mill 256, which is movable in each direction H at an angle of °, H When passing a portion of the shaped steel 143 other than the intermediate portion 211 in the longitudinal direction A, the inclined roll 224 is used, and one flange plate 141 on the inner surface 171 is a head cone-shaped outer peripheral surface 221 and a web plate 142 on the side surface 173. Is rolled toward the inner surface 171 and the side surface 173 in direction E so that the other flange plate 141 on the inner surface 181 is rolled toward the inner surface 171 and the side surface 173, respectively. On the surface 231 the web plate 142 on the side surface 173 is moved towards the inner surface 181 and the side surface 173 in direction F so that the web plate 142 on the side surface 173 is rolled on the truncated cone-shaped outer peripheral surface 232, and the inclined roll 244 is moved to one of the inner surfaces 191. The flange plate 141 is moved toward the inner surface 191 and the side surface 193 in the direction G so that the web plate 142 on the side surface 193 is rolled on the head conical outer peripheral surface 242, respectively. In the direction H, the inclined roll 254 is rolled so that the other flange plate 141 on the inner surface 201 is rolled on the head conical outer surface 251 and the web plate 142 on the side surface 193 is rolled on the head conical outer surface 252, respectively. In the direction E, the inclined roll 224 is moved toward the inner surface 201 and the side surface 193, and the inclined roll 234 is moved in the direction E so as to release the rolling when the intermediate portion 211 in the longitudinal direction A of the H-section steel 143 passes. In the direction F, the inclined roll 244 is moved in the direction G and the inclined roll 254 is moved in the direction H in opposite directions to form the bulging portion 212, whereby the divergent shape of the bulging portion 212 is formed. It can be resolved.

By the way, in the variable width rolling mill 151 shown in FIG. 14 and the variable width rolling mill 256 shown in FIG. 17, for example, the flange plates 141 of the pair of rollers 84 and 85 shown in FIG. 8 are respectively compared to the flange plates 141, respectively. By repeatedly rolling by pressing contact with both edges 215 and 216, a portion corresponding to each of one end portion 21, notches 24 and 25, intermediate portion 26 and other end portion 27 is formed, and such a portion is formed. The one end portion 5 of the beam 4 can be obtained by cutting the H-shaped steel 143 formed from the center 217 in the longitudinal direction A, and the edger roll machine 266 having the hole-type depth variable mechanism shown in FIG. In the H-shaped steel 143 shown in FIG. 16, each of the flange plate 141 has a bulge 212 corresponding to the flange plate bulge 23, and the side surfaces 173 and 193 of the web plate 142 have web plate bulges. In addition to the bulging portion 213 corresponding to 33, a portion corresponding to each of the one end portion 21, the notch 24 and 25, the intermediate portion 26 and the other end portion 27 may be formed in each of the flange plates 141.

The edger roll machine 266 has a rotating shaft 272 that is rotated in the R2 direction about the axis 271 and an edge 215 of each of the pair of flange plates 141 of the H-shaped steel 143 that are fixed to the rotating shaft 272. One pair of horizontal rolls for flange edging 274 having a cylindrical outer peripheral surface 273 that presses into contact with, and an annular side surface 275 and web plate 142 that press against one inner surface 171 and 181 of one and the other flange plate 141. One pair of web restraint ring rolls 277 each having a cylindrical outer peripheral surface 276 that presses and contacts one side surface 173, and an axis eccentric with respect to the axis 271 between each of the rotating shaft 272 and the web restraint ring roll 277. It is arranged with a core 278, and on the annular inner peripheral surface 279, it is mounted on the rotating shaft 272 via a cylindrical inner peripheral bearing so as to be rotatable around the axial center 271, while the outer circumference of the annular shape. A pair of eccentric intermediate ring rolls 281 mounted on the surface 280 so that the web restraint ring roll 277 can rotate around the axis 278 via a cylindrical outer peripheral bearing, and the R2 direction about the axis 291. A pair of rotating shafts 292 that are rotated around and a pair of other ones having a cylindrical outer peripheral surface 293 that is fixed to the rotating shaft 292 and presses and contacts each of the respective edges 216 of the pair of flange plates 141 of the H-shaped steel 143. A horizontal roll 294 for flange edging and an annular side surface 295 that presses and contacts the other inner surfaces 191 and 201 of one and the other flange plate 141 and a cylindrical outer peripheral surface 296 that presses and contacts the other side surface 193 of the web plate 142, respectively. It is arranged between the other pair of web restraint ring rolls 297 and the rotary shaft 292 and the web restraint ring roll 297 with an axial center 298 eccentric with respect to the axial center 291 and an annular inner peripheral surface 299. Is mounted on the rotating shaft 292 via a cylindrical inner peripheral bearing so as to be rotatable around the axis 291. On the other hand, a web restraint ring roll is provided on the annular outer peripheral surface 300 via the cylindrical outer peripheral bearing. An eccentric position (not shown) that sets the eccentric positions of the pair of eccentric intermediate ring rolls 301 and the pair of eccentric intermediate ring rolls 281 and 301, which are mounted so that the 297 is rotatable around the axis 298. A setting device is provided, and one horizontal roll 274 for flange edging and one web restraint ring roll 277 are a web plate 1. The other horizontal roll 294 for flange edging and the other web restraint ring roll 297 are also mounted on the rotating shaft 272 so as to approach and separate from each other in the width direction D of 42, and also approach each other in the width direction D of the web plate 142. , It is mounted on the rotating shaft 292 so as to be detachable.

The edger roll machine 266 rotates the rotating shafts 272 and 292 in the R2 direction, and has a pair of flange edging horizontal rolls 274 and a pair of web restraint ring rolls 277 and a pair of flange edging horizontal rolls 294 and a pair of web restraint rings. The H-beam 143 inserted between the rolls 297 is rolled and moved in direction C, and in this rolling movement, a pair of web restraint ring rolls 277 and a pair as well as horizontal rolls 176 and 186 and 196 and 206. A bulge 212 is formed on the inner surfaces 171 and 191 of one flange plate 141 and the inner surfaces 181 and 201 of the other flange plate 141 by the web restraint ring roll 297, and if necessary, one and the other side surface 173 of the web plate 142 and While each bulge 213 is formed in 193, both edges 215 and each edge of one and the other flange plate 141 by a pair of flange edging horizontal rolls 274 and 294 at an eccentric position set by an eccentric position setting device and By rolling the 216, portions corresponding to the one end portion 21, the notch 24 and 25, the intermediate portion 26 and the other end portion 27 are formed on each of the one and the other flange plate 141.

As shown in FIG. 21, the horizontal roll 312 rotates in the R2 direction around the axis 311 and presses and contacts the edges 215 of the pair of flange plates 141, and rotates in the R2 direction around the axis 321. A horizontal roll 322 that presses and contacts each of the edges 216 of the pair of flange plates 141, and a cylindrical outer peripheral surface 332 that rotates in the R2 direction around the axis 331 and presses and contacts one side surface 173 of the web plate 142. One pair of web local rolling rolls 333 each having, and the other pair having a cylindrical outer peripheral surface 342 that rotates in the R2 direction about the axis 341 and presses and contacts the other side surface 193 of the web plate 142. Corresponding to the web plate bulging portion 33 by rolling the web plate 142 in cooperation with the pair of web local rolling rolls 333 and the pair of web local rolling rolls 343 in a rolling mill 351 equipped with the web local rolling roll 343. The bulging portion 213 may be formed independently on the side surfaces 173 and 193 of the web plate 142 of the H-shaped steel 143 in advance.

Further, as shown in FIG. 22, a vertical roll 155 having a cylindrical outer peripheral surface 153 that presses and contacts the outer surface 152 of one of the above-mentioned flange plates 141 and rotating in the R1 direction about the axis 154, and the other flange. In addition to the vertical roll 165 which has a cylindrical outer peripheral surface 163 that presses and contacts the outer surface 162 of the plate 141 and rotates in the R1 direction around the axis 164, it rotates in the R1 direction around the axis 351 and on the other hand. A flange local rolling roll 352 that presses and contacts one inner surface 171 of the flange plate 141, and a flange local rolling roll that rotates in the R1 direction about the axis 361 and presses and contacts the other inner surface 191 of one flange plate 141. 362, a flange local rolling roll 372 that rotates in the R1 direction about the axis 371 and presses and contacts one inner surface 181 of the other flange plate 141, and a flange local rolling roll 372 that rotates in the R1 direction about the axis 381 and the other. Rolling on one flange plate 141 in which the vertical roll 155 and the flange local rolling rolls 352 and 362 cooperate with each other in a rolling mill 391 equipped with a flange local rolling roll 382 that presses and contacts the other inner surface 201 of the flange plate 141. Then, by rolling the other flange plate 141 in which the vertical roll 165 and the flange local rolling rolls 372 and 382 cooperated, the bulging portion 212 corresponding to the flange plate bulging portion 23 was independently preliminarily made of H-shaped steel. It may be formed on the inner surfaces 171 and 191 and the inner surfaces 181 and 201 of the flange plate 141 of 143, respectively.

The one end portion 5 of the beam 4 of the present invention may be formed not only by rolling but also by casting or cutting.

1 Pillar-beam joint structure 2 Pillar surface 3 Pillar 4 Beam 5, 7 One end 6 Connecting mechanism 8 Main body 11, 12 Flange plate 13 Face 14 Web plate 21, 31 One end 22 Edge 23 Flange plate bulge 24, 25 Notch 26 Middle part 27, 34 End part 28, 35 Bolt hole 32 Both sides 33 Web plate bulge

Claims (2)

A first step in preparing an H-beam material for a beam comprising upper and lower flange plates having facing faces and a web plate joined to the facing faces of the upper and lower flange plates, and an H-beam. The second step of forming a flange plate bulge by rolling on each of the facing surfaces of the upper and lower flange plates of the steel material, and the upper and lower flanges of the H-shaped steel material separated from the bulge of the flange plate in the longitudinal direction. It comprises a third step of rolling notches on both edges in the width direction of the plate and a fourth step of rolling web plate bulges on both sides of the I-beam web plate. A method for producing an H-beam for a beam having a beam-column joint structure from an H-beam material for a beam, which comprises producing the H-beam through the second, third, and fourth steps . The H- section steel material for a beam according to claim 1, wherein the second, third and fourth steps are repeated in order to gradually form the flange plate bulge, the notch and the web plate bulge by rolling. A method for producing H-section steel for beams having a beam-column joint structure .

Images