JPH1193256A - End tab for welding beam flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end tab for welding a beam flange in which a steel beam can be efficiently welded to a steel pillar, the toughness of its connected part is improved, and the whole safety of a structure is improved. SOLUTION: An end tab 2 is made of ceramic, and formed by cutting of two chipped parts 6 from a rectangular parallelepiped ceramic body 4. Each chipped part 6 comprises a first space part 8 of triangular prismatic shape and a second space part 10 of triangular prismatic shape. One chipped part 6 is formed so as to be symmetric in the right-to-left direction in a condition where the end tab 2 is rotated by 180 deg. upside down relative to the other chipped part 6. Letters 'U' and 'R' and an 'ARROW' to indicate the direction facing a beam are formed on an upper surface 204 of the end tab 2 so as to be arranged on the right side of a flange with the upper surface 204 upward, and similarly, letters 'U' and 'L' and an 'ARROW' to indicate the direction facing the beam are formed on a lower surface 206 so as to be arranged on the left side with the lower surface 206 upward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam flange welding end tab used for connecting a steel beam to a steel column when building a steel frame.

[0002]

2. Description of the Related Art Since the Great Hanshin Earthquake, the toughness of welded joints in building frames has been reexamined. For example, when a steel beam is connected to a steel column by welding in a steel frame, a defect is likely to occur in the craters at the start and end points of the arc. Therefore, conventionally, end tabs are arranged at the starting point and the ending point of the welding beat, and even when such a defect occurs, the defect is located outside the portion where the beam and the column face each other. On the other hand, the number of connecting portions between steel beams and steel columns in the building frame is extremely large. Therefore, it is important how efficiently the joint between the steel beam and the steel column can be welded and the toughness can be enhanced.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable a steel beam to be efficiently welded to a steel column. In addition, it is an object of the present invention to provide a beam flange welding end tab capable of improving the toughness of the connecting portion.

[0004]

In order to achieve the above object, the present invention is directed to a ceramic beam flange welding end tab comprising a rectangular parallelepiped ceramic body having two notches formed therein. Is formed by combining a triangular prism-shaped first space portion and a triangular pyramid-shaped second space portion, and in one of the two notches, the triangular prism-shaped first space portion is formed of a ceramic body. A triangular prism having a height of less than half of the front-rear length has one end face located on the front surface of the ceramic body, and one of the three side faces is equal to the vertical height of the ceramic body. A length is located on the left side of the ceramic body, and one of the other side faces is located on an upper surface of the ceramic body having a length that is greater than approximately one-half the left and right length of the ceramic body. Cut out of ceramic body Is formed by, in missing portions of the one, second space portion of the triangular pyramid shape, a triangular pyramid having a height greater than half the longitudinal length of the ceramic body,
The bottom face is made to coincide with the other end face of the triangular prism, and the apex thereof is located on a ridgeline which is a boundary between the upper face and the left face of the ceramic body, and one of the three side faces of the triangular pyramid is placed on the upper face of the ceramic body. It is formed by being cut out from the ceramic body with the other side positioned on the left side of the ceramic body, and the other cutout is formed by vertically moving the end tab with respect to the one cutout. It is characterized in that it is formed so as to have a symmetrical shape when rotated 180 degrees so as to be reversed. In addition, the present invention is used when the beam flange welding end tab is used to join a beam to a column, and on the upper surface and the lower surface of the end tab, the direction facing the column and the left side or the right side of the beam are respectively positioned. Is displayed.

The end tabs of the present invention are used, for example, by being arranged on the left and right sides of an end of a beam facing a pillar on a backing metal. By using the end tab of the present invention, even if a defect occurs at the start point and the end point of the welding beat, this defect is
Since it is located outside the beam in the width direction, it is advantageous in improving the toughness of the welded joint. Further, since the weld bead is formed in the notch, both ends in the longitudinal direction of the weld bead are spread in a fan shape on the outer side in the width direction of the beam,
It is even more advantageous in increasing the toughness of the weld joint.
In addition, when the shape of the cutout portion is inverted upside down, the end tab is formed symmetrically, so that two end tabs having the same shape can be used on the left and right sides of the beam, which is advantageous in reducing cost. . Further, since the end tab is made of ceramic and can be removed and diverted to another welding portion after welding and joining, it is more advantageous in reducing costs.

[0006]

Next, an embodiment of the present invention will be described. 1 is a perspective view of an end tab, FIG. 2 is a plan view of an end tab, and FIGS. 3 to 6 are respectively a view taken along a line II, a view taken along a roll line, a view taken along a haha line, and a view taken along a Nini line in FIG. Show. The end tab 2 for welding a beam flange is made of ceramic. As shown in FIG. 1, the end tab 2 is formed by cutting off two notches 6 from a rectangular parallelepiped ceramic body 4. Each of the cutouts 6 includes a first space portion 8 having a triangular prism shape and a second space portion 10 having a triangular pyramid shape.

In one of the two notches 6, the triangular prism-shaped first space portion 8 has a height S smaller than approximately ほ ぼ of the front-rear length of the ceramic body 4. Has one end face positioned on the front face 402 of the ceramic body 4, and one of the three side faces has a length equal to the vertical height of the ceramic body 4 and the left face 408 of the ceramic body 4. And one of the other side faces is cut off from the ceramic body 4 on the upper surface 404 of the ceramic body 4 having a length that is substantially more than half of the left-right length of the ceramic body 4. It is formed with.

In one of the two notches 6, the second space 10 having a triangular pyramid shape has a triangular pyramid having a height greater than 前後 of the front-rear length of the ceramic body 4. The bottom surface is made to coincide with the other end surface of the first space portion 8 and the vertex 1002 is located on the ridge line which is the boundary between the upper surface 404 and the left surface 408 of the ceramic body 4, and the second triangular pyramid is formed.
One of the three side surfaces of the space 10 is located on the upper surface 404 of the ceramic body 4, and the other side surface is located on the left surface 408 of the ceramic body 4, and is cut from the ceramic body 4. Is formed.

As described above, the front surface 402 of the ceramic body 4
The triangular prism-shaped first space 8 and the triangular pyramid-shaped second space 10 are cut out from the upper surface 404 and the left surface 408, and the triangular prism-shaped first space 8 and the triangle are formed in front of the upper surface 204 and the left surface 208 of the end tab. The conical second space 10 is located, and the front surface 202 of the end tab 2 has a trapezoidal shape and the upper surface 2
04 has a trapezoidal shape with a rectangle added, and the left surface 208 has a trapezoidal shape. Further, a rectangular cut surface 2010 extending from the lower edge front portion of the left surface 408 of the ceramic body 4 to a position near the right edge 404 of the upper surface, and the cut surface 2
A triangular cutout surface 2012 extending from the trailing edge of 010 to the vertex 1002 is formed. In addition, on the upper surface 204 of the end tab 2, with the upper surface 204 facing upward, the flange is placed with the upper surface 204 facing upward so that the end tab 2 is arranged on the right side of a flange of a beam to be described later. The letters “U” and “R” indicating that they are to be arranged on the right side, and “arrows” indicating the direction of facing the beam are formed.

[0010] The other notch 6 is turned 180 degrees with respect to the one notch 6 so that the end tab 2 is turned upside down.
It is formed so as to have a left-right symmetrical shape when rotated in degrees and viewed in plan. More specifically, in the other cutout 6, the triangular prism-shaped first space portion 8 includes a triangular prism similar to the above with one end face positioned on the rear surface 410 of the ceramic body 4 and the three triangular prisms. One of the side surfaces is located on the right surface 412 of the ceramic body 4, and the other one is located on the lower surface 406 of the ceramic body 4 and is cut from the ceramic body 4.

The triangular pyramid-shaped second space portion 10 is formed by a triangular pyramid having the same bottom surface as the other end surface of the first space portion 8 and a vertex 1004 of the ceramic body 4.
Is positioned on the ridge line which is the boundary between the lower surface 406 and the right surface 412, and one of the three side surfaces of the triangular pyramid-shaped second space portion 10 is positioned on the lower surface 406 of the ceramic body 4,
The other side is located on the right side 412 of the ceramic body 4 and cut out from the ceramic body 4.

Thus, the rear surface 410 of the ceramic body 4
The triangular prism-shaped first space portion 8 and the triangular pyramid-shaped second space portion 10 are cut out from the lower surface 406 and the right surface 412, and the triangular prism-shaped first space portion 8 and the triangular shape are provided behind the lower surface 406 and the right surface 412 of the end tab. The conical second space 10 is located, and the rear surface 210 of the end tab 2 has a trapezoidal shape, and the lower surface 2
06 is formed in a trapezoidal shape with a rectangle added, and the right surface 212 is formed in a trapezoidal shape. Further, a rectangular cutout surface 2010 extending from the rear edge of the upper edge of the right surface 408 of the ceramic body 4 to a position near the left edge of the lower surface 406, and the cutout surface 20
A triangular cutout surface 2012 extending from the leading edge of 10 to the apex 1004 will be formed. Also, on the lower surface 206, the end tab 2 is arranged on the left side of the flange with the lower surface 206 facing upward so that the end tab 2 is located on the left side of the flange of the beam described later with the lower surface 206 facing upward. The letters “U” and “L” indicating that the beam is to be made, and an “arrow” indicating the direction of facing the beam are formed.

Next, a method of using the end tab 2 will be described. FIG. 7 is a plan view of the use state of the end tab, and FIG. 8 is a sectional view taken along the line A of FIG. In these figures, 30 is a steel column, 32 is a beam made of I-shaped steel (or H-shaped steel), and the beam 32 is made up of a web 3202 and upper and lower flanges 3204. A scar wrap 3206 is provided above the flange 3204.
Are formed. Reference numeral 34 denotes a backing metal, the backing metal 34 has a rectangular plate shape, and the backing metal 34 is a pillar 30 or
It is temporarily welded to the end of the flange 3204. The backing metal 34 has a width larger than the width of the beam 32, and in this embodiment, the lower surface of the upper flange 3204 and the lower flange 3204 so that both ends protrude from both sides in the width direction of the beam 32. Are temporarily welded to the lower surfaces of the respective members.

When welding the end of the beam 32 to the column 30, the end of the beam 32 faces the column 30, and the tip of the backing metal 34 contacts the side surface of the column 30. As shown in FIG. 7, on the right side of the beam 32, the upper surface 204 faces upward, the cutout 6 faces the column 30 and the beam 32, and the left surface 208
Abuts against the right end surface of the upper flange 3204, and the front surface 20
The end tab 2 is placed on the backing metal 34 such that the abutment 2 comes into contact with the column 30. That is, the surface on which the letters “U” and “R” are written faces upward, and the “arrow” is placed facing the column 30. On the left side of the beam 32, the lower surface 206 faces upward, the cutout 6 faces the column 30 and the beam 32, the right surface 212 abuts the left end surface of the upper flange 3204, and the rear surface 210 faces the column 30. To abut,
The end tab 2 is placed on the backing metal 34. That is, the surface on which the letters “U” and “L” are written faces upward, and the “arrow” is placed facing the column 30. Then, the end tabs 2 on both sides are appropriately fastened to both sides of the upper flange 3204 on the backing metal 34 with metal fittings, and fixed so as not to move.

Next, the notch 6 of one end tab 2 extends over the backing metal 34 between the notches 6 of the end tabs 2 on both sides.
The upper flange 3204 and the column 30 are joined to each other by arc welding with the inside as the starting point of the arc and the inside of the cutout 6 of the other end tab 2 as the ending point of the arc. In FIGS. When the welding is completed, the fixing of the end tab 2 by the metal fitting is released, and the end tab 2 is removed from the upper flange 3204. Similarly, backing money 3
4 using two end tabs 2 on the lower flange 3204
To the column 30.

Therefore, according to this embodiment, even if a defect occurs at the start point and the end point of the welding beat 36,
This defect is located outside the flange 3204 in the width direction, which is advantageous in improving the toughness of the welded joint. In addition, since the weld bead 36 is formed in the notch 6, both ends in the longitudinal direction of the weld bead 36 spread fan-shaped outside the width direction of the flange 3204,
It is even more advantageous in increasing the toughness of the weld joint.
Further, the shape of the notch 6 is formed symmetrically when the end tab 2 is turned upside down, so that two end tabs 2 having the same shape are connected to the flange 3 as in the embodiment.
It can be used on the left and right sides of 204, which is advantageous in reducing costs. In addition, since the end tab 2 is made of ceramic and can be removed and diverted to another welding portion after welding and joining,
This is even more advantageous in reducing costs. When the end tab 2 is used on the left and right sides of the flange 3204, the direction in which the end tab 2 comes into contact with the column 30 and whether the end tab 2 comes to the right or left side of the beam 32 are formed. It can be performed efficiently.

The specific size of the end tab 2 is
The length (Y + X + S) is set to 45 in consideration of ease of handling, as shown in FIG.
mm, width (X + Z) is 35 mm, dimension Y is 1
1 mm and the dimension Z are 10 mm. The dimension S is generally 9 mm, which is the root interval at the time of beam flange welding. The height T is determined in accordance with the flange thickness of the beam 32. The flange thickness is generally about 19 mm to 35 mm, and is about 35 mm. In addition, as shown in FIGS. 3 to 6, the groove angle α of the beam flange is generally set to 35 ° as a standard, and as shown in FIG. 2, the spread angle β of the welding line at both ends of the beam flange is 45 °. It is said. Further, the dimension X is a function of the above T and α, and since X = T · tan α, if T = 35 mm and α = 35 °, X = 24.5, that is, 25 mm.

[0018]

As is apparent from the above description, the present invention is a ceramic beam flange welding end tab in which two notches are formed in a rectangular parallelepiped ceramic body. A triangular prism-shaped first space portion and a triangular pyramid-shaped second space portion are respectively formed together, and in one of the two notches, the triangular prism-shaped first space portion is located in front of and behind the ceramic body. A triangular prism having a height of less than one half of its length has one end face located on the front surface of the ceramic body, and one of the three side faces having a length equal to the vertical height of the ceramic body. And the other one side is located on the upper surface of the ceramic body having a length greater than approximately one-half the left and right length of the ceramic body. Being cut off from the body In the one of the cutouts, the triangular pyramid-shaped second space portion is formed by a triangular pyramid having a height greater than 前後 of the front-rear length of the ceramic body. The triangular pyramid is positioned on the ridgeline, which is the boundary between the upper surface and the left surface of the ceramic body, and one of the three side surfaces of the triangular pyramid is positioned on the upper surface of the ceramic body. One side is positioned on the left side of the ceramic body and is cut out from the ceramic body, and the other notch is rotated by 180 degrees with respect to the one notch so that the end tab is turned upside down. It is characterized in that it is formed so as to have a symmetrical shape in a state where it is made to be left and right. Therefore, the steel beam can be efficiently welded to the steel column, and the toughness of the connecting portion can be enhanced, so that the safety of the entire structure can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an end tab.

FIG. 2 is a plan view of an end tab.

FIG. 3 is a view as viewed from the direction of the arrow II in FIG. 2;

FIG. 4 is a view as seen from the arrow of FIG. 2;

FIG. 5 is a view taken in the direction of the arrow haha in FIG. 2;

FIG. 6 is a view as seen in the direction of the arrows in FIG. 2;

FIG. 7 is a plan view of the use state of the end tab.

FIG. 8 is a sectional view taken along the line A of FIG. 7;

[Explanation of symbols]

 2 End tab 4 Ceramic body 6 Missing part 8 First space part 10 Second space part 30 Column 32 Beam 34 Backing metal 36 Weld bead

Claims (2)

[Claims] 1. A ceramic beam flange welding end tab formed by forming two notches in a rectangular parallelepiped ceramic body, wherein each of the notches is a triangular prism-shaped first space and a triangular pyramid-shaped. A second space is formed together, and in one of the two notches, the triangular prism-shaped first space has a height smaller than 前後 of the front-rear length of the ceramic body. A triangular prism has one end face located on the front surface of the ceramic body, and one of the three side faces located on the left face of the ceramic body having a length equal to the vertical height of the ceramic body. The other one side is formed by being cut off from the ceramic body and located on the upper surface of the ceramic body having a length greater than substantially half of the left-right length of the ceramic body; In the part, In the triangular pyramid-shaped second space, a triangular pyramid having a height greater than half the front-to-rear length of the ceramic body has its bottom surface coincident with the other end surface of the triangular prism and its vertex is set to the ceramic body. It is located on the ridgeline that is the boundary between the upper surface and the left surface, one of the three sides of the triangular pyramid is located on the upper surface of the ceramic body, and the other side is located on the left surface of the ceramic body. The other cutout is formed in a state of being symmetrical with respect to the cutout by rotating the end tab by 180 degrees so that the end tab is turned upside down. An end tab for beam flange welding, wherein the end tab is formed at 2. The beam flange welding end tab is used for joining a beam to a column, and the upper and lower surfaces of the end tab are respectively oriented in a direction facing the column and positioned on the left or right side of the beam. The display of claim 1 is formed.
End tab for beam flange welding as described.