JP6381762B1 - Beam reinforcement - Google Patents

Abstract

There is no need to use a backing metal at the time of butt welding, and widening of the first layer welded portion is ensured to ensure a sufficient carrying range of the welding torch for sound welding.
In order to butt weld an outer surface of an insertion portion and an opening forming surface of a through hole of a web, the insertion portion is inserted into the through hole and one side surface of the flange portion is taken. Between the web 1A and the flange portion 6 that are in contact with each other between the insertion base end portion 5A of the insertion portion 5 and the opening forming surface 2A. A gas venting space S1 for venting the shield gas of the first layer welding is formed, and an outer cross-sectional shape of the insertion intermediate portion 5B communicating with the insertion base end portion 5A is curved from the groove bottom SS. In addition, the cross-sectional shape of the outer shape of the insertion tip 5C communicating with the insertion middle 5B is a straight line, and a J-shaped opening is formed between the insertion middle 5B and the insertion tip 5C of the insertion 5 and the opening forming surface 2A of the through hole 2. The tip S2 was formed.
[Selection] Figure 3

Description

  The present invention relates to a beam reinforcing member provided in a through-hole formed in a steel beam web.

  H-shaped steel, I-shaped steel, and the like are widely used as beams for building structures, but in such beams, there are cases in which through holes for passing pipes provided inside the building structure are formed. . At that time, in order to prevent the strength of the beam from being lowered due to the formation of the through hole, a beam reinforcing member is generally attached to the through hole as a reinforcing metal fitting by welding.

  As such a beam reinforcing member, for example, as shown in Patent Document 1, a ring-shaped beam reinforcing member is circumferentially welded to a beam web and fixed, or as shown in Patent Document 2, a ring-shaped reinforcing member is used. There is a method in which an inclined surface is provided on the outer side of the steel plate, inserted into the opening of the web and fixed by welding, and a decrease in strength due to web breakage is suppressed.

JP 2007-162243 A JP 2011-174411 A

  However, the welding method described in Patent Document 1 is fillet welding. As shown in FIG. 12 (a), the position of the beam reinforcing member 14 having the insertion hole 7 through which the pipe passes is the position of the steel beam 11. If it is in the vicinity of the flange 11B, this flange 11B obstructs the torch angle θ1 of the appropriate fillet welding welding torch 10, and a correct welding rod cannot be obtained. Further, since the outer periphery of the beam reinforcing member 14 is fillet welded to the web 11A, if the portion to be reinforced is eccentric to the flange 11B, a welding failure is likely to occur.

  That is, the fillet welding torch angle θ1 shown in Patent Document 1 is about 40 degrees, but as shown in FIG. 12B, the portion to be reinforced is eccentric to the flange 11B and the flange In the case of being located in the vicinity of 11B, the torch angle θ2 is close to the vertical, and is not suitable for fillet welding. As a result, it is desirable to weld with equal legs, but as shown in FIG. 13, the welding length LL1 in the vertical direction of the welded portion 19 is short, and on the contrary, the welding length LL2 in the horizontal direction is too long, resulting in unequal leg welding. Will result in poor welding.

  Further, as shown in FIG. 14, the welding shown in Patent Document 2 is a butt welding in which the beam reinforcing member 24 having the insertion hole 7A for passing the pipe has a groove, but has no root gap. The carrying rod range m of the welding torch 10 is extremely narrow, and a sufficient carrying rod range m cannot be secured, and the first layer weld 9A1 has poor penetration of the welding material and does not fuse well with the base material, resulting in poor penetration. To do.

  That is, in the welding shown in Patent Document 2, since there is no route gap between the web 12A of the steel beam 12 at the groove bottom SS1 of the beam reinforcing member 24, the spread section of the first layer weld 9A1 is extremely large. Before the tip of the welding material reaches the welding target point, it sparks with the surrounding material, and the arc does not reach the groove bottom SS1. Therefore, although the torch angle θ3 can be secured around 20 degrees, the rod range m is narrow, the welding torch 10 cannot smoothly move, the welding material does not melt well, the fusion with the base material does not work well, and the penetration is poor. Will occur.

  Therefore, the present invention eliminates the need for using a backing metal during butt welding, widens the spread of the first-layer weld, secures a sufficient range of the welding torch, and can perform sound welding. An object is to provide a reinforcing member.

Therefore, the first invention is a beam reinforcing member provided in a through hole formed in a steel beam web,
An insertion hole for presenting a ring shape and allowing the piping to pass therethrough is formed, and an insertion portion having an outer diameter smaller than the through hole and inserted into the through hole, and an outer diameter larger than the through hole and the insertion portion being When inserted into the through hole, one side surface includes a flange portion that comes into contact with a peripheral edge portion of the through hole,
The insertion portion is inserted into the through hole, and the one side surface of the flange portion is connected to the outer surface of the insertion portion and the opening forming surface of the through hole of the web. When contacting the peripheral edge, between the opening forming surface of the through hole of the web and the outer surface of the insertion portion,
Gas venting for venting the shield gas of the first layer welding through the gap between the web and the flange portion that are in contact with each other between the insertion base end portion of the insertion portion and the opening forming surface of the through hole Forming a space for
The cross-sectional shape of the outer shape of the insertion intermediate portion communicating with the insertion base end portion is curved from the groove bottom and the cross-sectional shape of the outer shape of the insertion distal end portion communicating with the insertion intermediate portion is a straight line. A J-shaped groove is formed between the insertion intermediate portion and the insertion tip portion and the opening forming surface of the through hole.

The second invention is a beam reinforcing member provided in a through hole formed in a steel beam web,
An insertion hole for presenting a ring shape and allowing the piping to pass therethrough is formed, and an insertion portion having an outer diameter smaller than the through hole and inserted into the through hole, and an outer diameter larger than the through hole and the insertion portion being When inserted into the through hole, one side surface includes a flange portion that comes into contact with a peripheral edge portion of the through hole,
The insertion portion is inserted into the through hole, and the one side surface of the flange portion is connected to the outer surface of the insertion portion and the opening forming surface of the through hole of the web. When contacting the peripheral edge, between the opening forming surface of the through hole of the web and the outer surface of the insertion portion,
Gas venting for venting the shield gas of the first layer welding through the gap between the web and the flange portion that are in contact with each other between the insertion base end portion of the insertion portion and the opening forming surface of the through hole Forming a space for
Further, a cross-sectional shape of the outer shape of the other portion communicating with the insertion base end portion is curved from the groove bottom, and a J-shaped opening is formed between the other portion of the insertion portion and the opening forming surface of the through hole. It is characterized by forming the tip.

  Furthermore, the third invention is the first or second invention, wherein the height of filling of the welded portion necessary for reinforcement is such that the flange on the other side opposite to the one side of the web is in contact with the flange. It is characterized in that it is formed up to the lower end of the end of the through hole on the insertion tip side or the end of the beam reinforcing member on the insertion tip side of the outer surface of the insertion portion.

  According to the present invention, it is not necessary to use a backing metal at the time of butt welding, and since the spread of the first layer welded portion can be widened, it is possible to secure a sufficient carrying range of the welding torch and perform sound welding. . In addition, gas can be vented through the gas venting space, and the penetration of the welding material at the time of the first layer welding is promoted. Furthermore, the inspection of the end of welding can be judged visually without using a welding gauge or other inspection equipment.

It is a longitudinal cross-sectional view which shows the state which mounted | wore the steel beam web with the beam reinforcement member which concerns on the 1st Embodiment of this invention. It is an arrow view which is the external view seen from the direction which the arrow of FIG. 1 instruct | indicates. It is a principal part enlarged view of FIG. It is a figure which shows the case where the position of the opening upper end part of the through-hole opened in the web is lower than the position of the upper end part of the insertion part of a beam reinforcement member. It is a figure which shows the case where the position of the opening upper end part of the through-hole opened in the web is higher than the position of the upper end part of the insertion part of a beam reinforcement member. It is sectional drawing which shows the beam reinforcement member made into the thickness which added thickness L2 to the lower part. It is sectional drawing which shows the beam reinforcement member made into thickness which added thickness L2 to the lower part, and added thickness L3 to the upper part. It is sectional drawing which shows the state which performed the first layer welding with the welding torch. It is sectional drawing of the principal part which shows the state which mounted | wore the steel beam web with the beam reinforcement member which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the principal part which shows the state with which the beam reinforcement member which concerns on 2nd Embodiment was similarly mounted | worn on the steel beam web. It is sectional drawing of the principal part which shows the state with which the beam reinforcement member which concerns on 2nd Embodiment was similarly mounted | worn with the thick web of the steel beam. It is sectional drawing for demonstrating fillet welding described in patent document 1. FIG. It is principal part sectional drawing of the state welded by the uneven leg by fillet welding. It is sectional drawing for demonstrating the welding described in patent document 2. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, FIG. 1 is a longitudinal sectional view showing a state in which a beam reinforcing member 4 according to a first embodiment of the present invention is mounted on a web 1A of a steel beam 1, and FIG. 2 is from a direction indicated by an arrow in FIG. It is an arrow view which is the external view seen.

  The steel beam 1 composed of an I-shaped steel having an I-shaped cross-section or an H-shaped H-shaped steel according to the present embodiment is composed of the web 1A and the flange 1B, which are base materials to be reinforced, of the web 1A. A through-hole 2 having a circular cross section is formed in the middle part.

  The beam reinforcing member 4 is formed in a ring shape with a circular insertion hole 7 </ b> B for passing a pipe (not shown) provided in the building structure at the center, and has an outer diameter from the through hole 2. When the insertion portion 5 is inserted into the through-hole 2 and the outer diameter is larger than the through-hole 2 and the insertion portion 5 is inserted into the through-hole 2, one side surface 6A And a hollow cylindrical flange portion 6 that abuts on the peripheral edge (opening peripheral edge).

  Then, the insertion portion 5 of the beam reinforcing member 4 is inserted into the through hole 2 of the web 1A, and the outer surface of the insertion portion 5 of the beam reinforcing member 4 and the opening of the through hole 2 of the web 1A. Since the formation surface 2A is butt welded, a special shape as will be described later is formed on the outer surface of the insertion portion 5, and downward butt welding can be easily performed. The material of the beam reinforcing member 4 is made of a metal having the same or similar material as that of the steel beam 1.

  If the groove portion of the beam reinforcing member 4 is to be butt welded, a large root gap should be originally provided, but in this embodiment, the insertion portion 5 has a special shape to make a butt contact. Even if a backing metal is not used during welding, the spread of the first layer welded portion can be widened, so that a sufficient carrying range m of the welding torch 10 can be secured and sound welding can be performed.

  That is, as shown in FIG. 3, the insertion portion 5 is inserted through the through hole 2, and the outer surface of the insertion portion 5 and the opening forming surface 2A of the through hole 2 of the web 1A are butt welded. Therefore, when the one side surface 6A of the flange portion 6 is brought into contact with the peripheral edge portion of the through hole 2, the opening forming surface 2A of the through hole 2 of the web 1A and the insertion portion 5 are Between the outer surface, the web 1A and the flange portion 6 that are in contact with each other between the insertion base end portion 5A of the insertion portion 5 and the opening forming surface 2A of the through hole 2 are minute. A degassing space S1 is formed for extracting the shield gas of the first layer welding through the gap. Specifically, a ring-shaped degassing space S1 is formed between the outer surface 5A1 of the insertion base end 5A of the insertion portion 5 and the opening forming surface 2A of the through hole 2 at equal intervals. Form. The shape of the longitudinal section of the degassing space S1 is a vertically long rectangle, the depth is about 2 mm, and the lateral width is about 1 mm.

  In addition, the cross-sectional shape of the outer shape of the insertion intermediate portion 5B that communicates with the hollow cylindrical columnar insertion base end portion 5A having a smaller diameter than the flange portion 6 is curved from the groove bottom SS and communicated with the insertion intermediate portion 5B. The hollow frustoconical insertion tip portion 5C has a straight cross-sectional shape between the insertion intermediate portion 5B and the insertion tip portion 5C of the insertion portion 5 and the opening forming surface 2A of the through hole 2. A J-shaped groove (space) S2 is formed. Therefore, the longitudinal cross-sectional shape of the outer side surface of the insertion base end portion 5A and the insertion intermediate portion 5B of the insertion portion 5 exhibits a J-shape. In this case, the shape of the outer side surface of the insertion portion 5 is gentle so that the lower part of the J-shaped groove S2 close to the degassing space S1 is wider as it is closer to the degassing space S1. By forming it with a rounded curve, the J-type groove S2 can widen the spread of the first layer weld, so that a sufficient rod range m of the welding torch 10 can be secured and sound welding can be performed. it can.

  That is, the upper end of the outer surface 5A1 of the insertion base end 5A of the insertion portion 5 (the boundary line between the insertion base end 5A and the insertion intermediate portion 5B) is the bottom of the groove of the J-shaped groove S2. The insertion intermediate portion 5B communicating with the insertion base end portion 5A has a curved cross section that has a small diameter from the upper end (the groove bottom SS) of the outer surface 5A toward the insertion distal end portion 5C. Formed to be. The insertion distal end portion 5C communicating with the insertion intermediate portion 5B is formed so that the cross section becomes a straight line so that the diameter gradually decreases from the upper end of the insertion intermediate portion 5B toward the distal end portion.

  Therefore, the J-shaped groove S2 communicating with the degassing space S1 has a curved section and a straight section in cross section, and the insertion of the insertion portion 5 forming the J-shaped groove S2 is performed. The intermediate portion 5B and the insertion tip portion 5C communicating with the insertion intermediate portion 5B via a circular connection line (boundary line) CS are formed with a smooth outer shape and without steps or catches. For this reason, the outer side surfaces of the insertion intermediate portion 5B and the insertion tip portion 5C of the insertion portion 5 are smooth, and the shape of the outer surface of the insertion portion 5 is close to the degassing space S1. Since the lower part of the J-shaped groove S2 is formed to have a wider area, the welding material (welded metal) adheres well when welding the J-shaped groove S2, and the fusion with the base material is good. Butt welding is good.

  In general butt-shaped butt welding, when providing a root gap, it is necessary to provide a backing metal. However, in the above-described J-shaped groove S2 according to the present embodiment, it is shown in FIG. As described above, the groove bottom SS is provided away from the one side surface 1A1 of the web 1A by the depth (distance) a, and due to the presence of the overlap margin b between the web 1A and the beam reinforcing member 4, Since the beam reinforcing member 4 has a thickness c on the lower side of the web 1A, the same effect as when the backing metal is provided can be obtained.

  Further, the groove bottom SS is formed away from the one side surface 1A1 of the web 1A by the depth a, so that the insertion portion 5 of the beam reinforcing member 4 is placed in the through hole 2 of the web 1A. In the butt welding, the lateral width of the degassing space S1 is the width d of about 1 mm, and the movement of the insertion base 5 in the outer peripheral direction of the insertion base end 5A is the penetration. Since it is surely regulated by the opening forming surface 2A of the hole 2, positioning of the beam reinforcing member 4 is prevented and a positioning mark is unnecessary, and the insertion portion of the web 1A into the through hole 2 is not required. 5 is easy to insert.

  In addition, by forming the groove bottom SS away from the one side surface 1A1 of the web 1A by the depth a, a shallow degassing space S1 of about 2 mm is formed. In general, since the first layer welding is a narrow space welding, it is difficult to remove the shielding gas necessary for this welding, but the occurrence of blowhole defects caused by shielding gas venting failure by providing the gas venting space S1. Can be greatly prevented. Further, in the first layer welding, the gas can be released through a minute gap between the web 1A and the flange portion 6 that are in contact with each other from the gas releasing space S1, and the first layer welding is performed. The penetration of the welding material is promoted, and poor penetration is not likely to occur.

  As shown in FIG. 3, if the groove angle θ <b> 4 of the J-shaped groove S <b> 2 can be secured about 30 degrees at the tip of the beam reinforcing member 4, sound welding can be performed. In the case of the prior art groove, the groove angle is about 45 degrees when the root gap is 6 mm, and the groove angle is about 35 degrees when the root gap is 9 mm. In the welding of the beam reinforcing member 4, sound butt welding can be performed without increasing the weld cross-sectional area (which is also a space for forming the first layer welded portion).

  Next, the welding end position of how far the welding is performed when the beam reinforcing member 4 is attached to the web 1A by welding will be described with reference to FIGS. That is, as shown in FIG. 4, during welding, the steel beam 1 is laid down and the insertion portion 5 of the beam reinforcing member 4 is inserted into the through hole 2 from below, and the one of the flange portions 6 is inserted. In the state where the side surface 6A is in contact with the web 1A, when the insertion portion 5 is inserted into the through hole 2 of the web 1A, the distal end portion of the insertion distal end portion 5C penetrates through the through hole 2, The position X of the upper end portion (the end portion on the insertion distal end side having a circular shape in plan view) of the opening forming surface 2A of the through hole 2 on the other side surface 1A2 opposite to the one side surface 1A1 of the web 1A is When the position is lower than the position Y of the upper end portion of the outer side surface of the insertion portion 5 of the beam reinforcing member 4 (the end portion on the insertion tip side of the outer side surface of the insertion tip portion 5C having a circular shape in plan view), welding is performed. The filling height of the welded portion 9 necessary for reinforcement is formed up to the position X. Once, to end the welding.

  On the contrary, as shown in FIG. 5, when the thickness of the web 1AA is thicker than the web 1A shown in FIG. 4, and the insertion portion 5 is inserted into the through hole 2 of the web 1AA, the insertion tip portion The position X of the upper end portion of the opening forming surface 2A of the through hole 2 on the other side surface 1AA2 opposite to the one side surface 1AA1 of the web 1AA without the front end portion of 5C penetrating from the through hole 2 is If the position Y of the upper end portion of the outer surface of the insertion portion 5 of the beam reinforcing member 4 is higher than the position Y, the filling height of the welded portion 9 necessary for reinforcement can be formed up to the position Y by welding. Finish the welding. Therefore, in any case, the inspection of the end of welding can be judged visually without using a welding gauge or other inspection equipment.

  Note that whether the position X or the position Y is higher or lower is determined based on the distance from the one side surface 6A of the flange portion 6 that forms the bottom surface of the degassing space S1. The shorter one is lower.

  Generally, the reinforcement of the steel beam 1 often has different reinforcement strength depending on the position where the through hole 2 provided in the steel beam 1 is provided. For example, when the through-hole 2 opened in the web 1A is located in the vicinity of a pillar constituting a building framework, the through-hole 2 needs to be strengthened in strength, and the central portion of the steel beam 1 In many cases, it is sufficient to reinforce the through-holes 2 provided in the base plate. These solutions are easy, and as shown in FIGS. 6 and 7, the reinforcing strength can be adjusted by changing the thickness of the beam reinforcing member 4, which will be described below.

  First, in the case where the beam reinforcing member 4 for weak strength has a thickness L1 shown in FIG. 4, as shown in FIG. 6, a beam reinforcing member 40 for strong strength having an insertion hole 7C for allowing piping to pass therethrough. Can be easily coped with by forming a thickness obtained by adding the thickness L2 to the thickness L1 in the lower part. In addition, as shown in FIG. 7, in the case of the beam reinforcing member 41 having a thickness corresponding to the web 1AA thicker than the thickness of the web 1A and having an insertion hole 7D for passing a pipe, the reinforcement strength is improved. At the same time, when it is necessary to increase the welding amount, the welding amount can be ensured by further increasing the thickness by adding the thickness L3 to the upper portion thereof.

  As described above, the strength of the beam reinforcing member can be dealt with only by changing the thickness thereof, so that the beam reinforcing member can be provided that can reduce the manufacturing cost by an easy method.

  In addition, as shown in FIG. 8, the torch angle θ5 of the welding torch 10 at the time of butt welding by the J-shaped groove S2 is ensured to be around 20 degrees, and the first layer weld portion 9A is formed. There is no problem with butt welding because the space is wide enough.

  That is, in the fillet welding shown in Patent Document 1, when the portion to be reinforced is eccentric to the flange 11B and positioned in the vicinity of the flange 11B, as shown in FIG. As shown in FIG. 13, the welding length LL1 in the vertical direction of the welded portion 19 is short, and the welding length LL2 in the horizontal direction is too long. Therefore, poor welding occurs, and the beam reinforcing member 24 shown in Patent Document 2 does not have a root gap in the butt welding in which the groove has a groove, so that the rod moving range m of the welding torch 10 is extremely large. Narrow, sufficient rod range m could not be secured, the welding of the welding material in the first layer welding was poor and the fusion with the base metal was not successful, and poor penetration occurred, but according to this embodiment, these problems Can be resolved

  Next, the beam reinforcing members 42 and 43 according to the second embodiment of the present invention will be described with reference to FIGS. 9, 10 and 11, but only the structure different from the first embodiment will be described. . First, as shown in FIG. 9, the shape of the outer surface of the insertion portion 51 of the beam reinforcing member 42 having a thickness L1 in which the insertion hole 7E for allowing piping to pass is formed is the same as that of the first embodiment described above. Different. That is, when the insertion portion 51 is inserted into the through hole 2 and one side surface 44A of the hollow cylindrical flange portion 44 is brought into contact with the peripheral edge portion of the through hole 2, the beam reinforcing member 42 is used. The other portion 51B of the insertion portion 51 and the through-hole 2 are formed with the cross-sectional shape of the outer shape of the other portion (remaining portion) 51B communicating with the insertion base end portion 51A of the insertion portion 51 as a curve from the groove bottom SS. A J-shaped groove (space) S20 is formed between the opening forming surface 2A. Therefore, the longitudinal cross-sectional shapes of the outer base surfaces of the insertion base end portion 51A and the other portion 51B having a hollow cylindrical shape having a smaller diameter than the flange portion 44 are substantially J-shaped.

  Further, as shown in FIG. 10, in the case of the web 1AA having a thickness D larger than that of the web 1A, the beam reinforcing member 42 is the same as that shown in FIG. 9, and the other member communicating with the insertion base end portion 51A is used. The cross-sectional shape of the outer shape of the portion (remaining portion) 51B is a curve from the groove bottom SS, and J is formed between the other portion 51B of the insertion portion 51 and the opening forming surface 2A of the through-hole 2. A shape groove (space) S21 is formed. Therefore, the longitudinal cross-sectional shapes of the outer base surfaces of the insertion base end portion 51A and the other portion 51B having a hollow cylindrical shape having a smaller diameter than the flange portion 44 are substantially J-shaped.

  As shown in FIGS. 9 and 10, the ring-shaped gas venting space is equidistant between the outer surface 51 </ b> A <b> 1 of the insertion base end 51 </ b> A and the opening forming surface 2 </ b> A of the through hole 2. S1 is formed.

  Further, as shown in FIG. 11, the shape of the outer surface of the insertion portion 52 of the beam reinforcing member 43 in which the insertion hole 7F for passing the pipe is opened and L3 is added to L3 is the first described above. Different from the embodiment. That is, when the insertion portion 52 is inserted into the through hole 2 and one side surface 45A of the hollow cylindrical flange portion 45 is brought into contact with the peripheral edge portion of the through hole 2, the beam reinforcing member 43 is inserted. The other portion 52B of the insertion portion 52 and the through-hole 2 are curved with the outer cross-sectional shape of the other portion (remaining portion) 52B communicating with the insertion base end portion 52A of the insertion portion 52 as a curve from the groove bottom SS. A J-shaped groove S22 (space) is formed between the opening forming surface 2A. Therefore, the longitudinal cross-sectional shape of the outer side surface of the insertion base end portion 52A and the other portion 52B of the insertion portion 52 is substantially J-shaped.

  A ring-shaped space S1 for venting gas is formed at an equal interval between the outer surface 52A1 of the insertion base end portion 52A and the opening forming surface 2A of the through hole 2.

  As described above, even in the beam reinforcing members 42 and 43 according to the second embodiment shown in FIGS. 9, 10, and 11, the beam reinforcing member 4 according to the first embodiment as described above, The same effect as 40 and 41 exists. That is, the outer surfaces of the insertion portions 51 and 52 forming the J-shaped grooves S20, 21 and 22 shown in FIGS. 9, 10 and 11 are smooth and have no steps or catches. , 52 has the shape of the outer surface of the gas venting space (the shape of the longitudinal section is a vertically long rectangular shape, the depth is about 2 mm, the depth a is about 2 mm, and the lateral width is about 1 mm. ) Since the lower part of the J-shaped groove S20, 21, 22 close to S1 is formed to have a wider area, a welding material (welded metal) at the time of welding the J-shaped groove S20, 21, 22 Butt welding is good because of good adhesion and good fusion with the base material.

  Further, since the beam reinforcement members 42 and 43 have a thickness c below the webs 1A and 1AA due to the existence of the overlap margin b between the webs 1A and 1AA and the beam reinforcement members 42 and 43, a backing metal is used. The same effect as that provided can be obtained. Therefore, even if a backing metal is not used at the time of butt welding, the shape of the outer surface of the insertion portions 51 and 52 is the lower part of the J-shaped grooves S20, 21 and 22 close to the gas venting space S1. Since the first-layer welded portion can be widened by the J-shaped grooves S20, 21, and 22 by forming a gently rounded curve so as to have a larger extent, a sufficient carrying rod of the welding torch 10 can be obtained. The range m can be secured and sound welding can be performed.

  Further, the groove bottom SS is formed away from the one side surface 1A1, 1AA1 of the webs 1A, 1AA by the depth a, so that the insertion portions 51, 52 of the beam reinforcing members 42, 43 are The webs 1 </ b> A and 1 </ b> AA always fit in the through holes 2, and the butt welding causes the insertion base end portions 51 </ b> A and 52 </ b> A to move in the outer circumferential direction to form the through holes 2. Since it is regulated by the surface 2A, positioning of the beam reinforcing members 42, 43 is prevented and a positioning mark is unnecessary, and the insertion portions 51, 52 into the through holes 2 of the webs 1A, 1AA are not required. Is easy to insert.

  In addition, by forming the groove bottom SS away from the one side surface 1A1, 1AA1 of the webs 1A, 1AA by the depth a, a shallow degassing space S1 of about 2 mm is formed. It becomes. In general, since the first layer welding is a narrow space welding, it is difficult to remove the shielding gas necessary for this welding, but the occurrence of blowhole defects caused by shielding gas venting failure by providing the gas venting space S1. Can be greatly prevented. Further, at the time of initial welding, gas is vented through a minute gap between the webs 1A, 1AA that are in contact with each other from the gas venting space S1 and the flange portions 44, 45 of the beam reinforcing members 42, 43. As a result, the penetration of the welding material during the first layer welding is promoted, and the penetration failure is less likely to occur.

  In the second embodiment shown in FIGS. 9 and 11, as in the first embodiment described above, the insertion portions 51 of the beam reinforcing members 42 and 43 are inserted into the through-hole 2 in order to perform welding. , 52 and the one side surfaces 44A, 45A of the flange portions 44, 45 are in contact with the webs 1A, 1AA, the insertion portions 51, 52 are inserted into the through holes 2 of the webs 1A, 1AA. When the web is inserted, the tip portions of the other portions 51B and 52B penetrate through the through-hole 2, and the webs 1A and 1AA have the other side surfaces 1A2 and 1AA2 opposite to the one side surfaces 1A1 and 1AA1. The position X of the upper end of the opening forming surface 2A of the through-hole 2 (the end on the insertion tip side having a circular shape in plan view) is the position of the outer surface of the insertion portion 51, 52 of the beam reinforcing member 42, 43. Upper end (circle in plan view) The height of the filling of the welded portion 9 necessary for reinforcement by welding is lower than the position Y of the other end portions 51B, 52B having the shape of the outer side of the insertion portion side end Y). If it can form to the said position X of the said upper end part of the said opening formation surface 2A, welding will be complete | finished. On the other hand, as shown in FIG. 10, when the insertion portion 51 is inserted into the through hole 2 of the web 1AA, the tip of the other portion 51B does not penetrate through the through hole 2, The position X of the upper end portion of the opening forming surface 2A of the through hole 2 on the other side surface 1AA2 opposite to the one side surface 1AA1 of 1AA is the outer side surface of the insertion portion 51 of the beam reinforcing member 42. If the height of the upper end portion of the insertion portion 51 is higher than the position Y of the insertion portion 51, the filling height of the welding portion 9 required for reinforcement can be formed up to the position Y of the upper end portion of the outer surface of the insertion portion 51. Finish the welding. Therefore, in any case, the inspection of the end of welding can be judged visually without using a welding gauge or other inspection equipment.

  9 to 11, whether one of the position X and the position Y is higher or lower is determined based on the one side surface of the flange portions 44 and 45 that form the bottom surface of the gas venting space S1. Judgment is made based on the distance from 44A and 45A, and the shorter one is lower.

  Furthermore, also in the second embodiment, when the beam reinforcing member 42 for weak strength is set to the thickness L1 shown in FIGS. 9 and 10, as shown in FIG. 11, the beam reinforcing member 43 for strong strength is used. Can be easily dealt with by adding the thickness L3 to the thickness L1 at the upper part, and the thickness L2 is further added to the lower part in the same manner as shown in FIG. The strength of the beam reinforcing member can be dealt with only by changing its thickness, and by doing so, it is possible to provide the beam reinforcing member that can suppress the manufacturing cost by an easy method.

  As described above, according to the present invention, as shown in the first embodiment, the insertion portion is inserted into the through hole, and the outer surface of the insertion portion and the opening forming surface of the through hole of the web are butted together. When the one side surface of the flange portion is brought into contact with the peripheral edge portion of the through-hole for welding, a gap between the opening forming surface of the through-hole of the web and the outer side surface of the insertion portion. In order to remove the shielding gas of the first layer welding through the gap between the web and the flange portion that are in contact with each other between the insertion base end portion of the insertion portion and the opening forming surface of the through hole A cross section of the outer shape of the insertion tip portion that forms a gas venting space and has a cross-sectional shape of the outer shape of the insertion intermediate portion communicating with the insertion base end portion as a curve from the groove bottom. During the insertion of the insertion section, the shape is a straight line Since the J-shaped groove is formed between the opening portion and the insertion tip portion and the opening forming surface of the through hole, the insertion portion is inserted into the through hole as shown in the second embodiment. When the one side surface of the flange portion is brought into contact with the peripheral edge portion of the through hole in order to butt weld the outer surface of the insertion portion and the opening forming surface of the through hole of the web, Between the opening formation surface of the through hole of the web and the outer surface of the insertion portion, the insertion base end portion of the insertion portion and the opening formation surface of the through hole are in contact with each other A degassing space is formed through the gap between the web and the flange to release the shield gas for the first layer welding, and the outer cross-sectional shape of the other part communicating with the insertion base end is opened. As a curve from the bottom, the other part of the insertion part and the front Since a J-shaped groove is formed between the opening forming surface of the through hole and the butt welding is not required, a backing metal is not required, and the spread of the first layer weld can be widened. The rod range can be secured and sound welding can be performed. In addition, gas can be vented through the gas venting space, and the penetration of the welding material at the time of the first layer welding is promoted.

  Further, according to the present invention, the filling height of the welded portion necessary for reinforcement is such that the insertion tip side of the opening forming surface of the through hole on the other side opposite to the one side of the web with which the flange portion abuts. The end of the beam or the outer end of the insertion portion of the beam reinforcing member is formed to the lower end of the insertion tip side, so that the inspection of the end of welding is performed with a welding gauge or other inspection device. Even if it is not used, it can be judged visually.

  As described above, the embodiments of the present invention have been described. However, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the above-described various modifications without departing from the spirit of the present invention. Including alternatives, modifications or variations.

DESCRIPTION OF SYMBOLS 1 Steel beam 1A, 1AA Web 1A1, 1AA1 One side surface 1A2, 1AA2 The other side surface 2 Through-hole 2A Opening formation surface 4,40,41,42,43 Beam reinforcement member 5,51,52 Insert part 5A, 51A, 52A Insertion base end portion 5B Insertion intermediate portions 51B, 52B Other portions 5C Insertion tip portions 6, 44, 45 Flange portions 6A, 44A, 45A One side surface 7A-7F Insertion hole 9 Welding portion G Root gap S1 Degassing space S2, S20, S21 J-shaped groove

Claims (3)

A beam reinforcing member provided in a through-hole formed in a steel beam web,
An insertion hole for presenting a ring shape and allowing the piping to pass therethrough is formed, and an insertion portion having an outer diameter smaller than the through hole and inserted into the through hole, and an outer diameter larger than the through hole and the insertion portion being When inserted into the through hole, one side surface includes a flange portion that comes into contact with a peripheral edge portion of the through hole,
The insertion portion is inserted into the through hole, and the one side surface of the flange portion is connected to the outer surface of the insertion portion and the opening forming surface of the through hole of the web. When contacting the peripheral edge, between the opening forming surface of the through hole of the web and the outer surface of the insertion portion,
Gas venting for venting the shield gas of the first layer welding through the gap between the web and the flange portion that are in contact with each other between the insertion base end portion of the insertion portion and the opening forming surface of the through hole Forming a space for
The cross-sectional shape of the outer shape of the insertion intermediate portion communicating with the insertion base end portion is curved from the groove bottom and the cross-sectional shape of the outer shape of the insertion distal end portion communicating with the insertion intermediate portion is a straight line. A beam reinforcing member, wherein a J-shaped groove is formed between the insertion intermediate portion and the insertion tip portion and the opening forming surface of the through hole. A beam reinforcing member provided in a through-hole formed in a steel beam web,
An insertion hole for presenting a ring shape and allowing the piping to pass therethrough is formed, and an insertion portion having an outer diameter smaller than the through hole and inserted into the through hole, and an outer diameter larger than the through hole and the insertion portion being When inserted into the through hole, one side surface includes a flange portion that comes into contact with a peripheral edge portion of the through hole,
The insertion portion is inserted into the through hole, and the one side surface of the flange portion is connected to the outer surface of the insertion portion and the opening forming surface of the through hole of the web. When contacting the peripheral edge, between the opening forming surface of the through hole of the web and the outer surface of the insertion portion,
Gas venting for venting the shield gas of the first layer welding through the gap between the web and the flange portion that are in contact with each other between the insertion base end portion of the insertion portion and the opening forming surface of the through hole Forming a space for
Further, a cross-sectional shape of the outer shape of the other portion communicating with the insertion base end portion is curved from the groove bottom, and a J-shaped opening is formed between the other portion of the insertion portion and the opening forming surface of the through hole. A beam reinforcing member characterized by forming a tip.   The height of the filling of the welded portion necessary for reinforcement is the end portion on the insertion tip side of the opening forming surface of the through hole on the other side surface opposite to the one side surface of the web with which the flange portion abuts or 3. The beam reinforcing member according to claim 1, wherein the beam reinforcing member is formed to the lower end of the outer surface of the insertion portion of the beam reinforcing member up to the end on the insertion tip side.

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