JP6960423B2 - Beam reinforcement metal fittings, beam reinforcement structure and beam reinforcement method - Google Patents

Description

The present invention relates to a beam reinforcing metal fitting for forming a building structure and reinforcing a beam having a through hole, and a beam reinforcing method for the beam.

Conventionally, through holes may be formed in the beams of building structures to pass pipes and wiring. In this case, the through hole reduces the bending strength of the beam. In order to prevent the bending strength of the beam from decreasing, a beam reinforcing metal fitting is joined to the beam to reinforce the beam.

As such a beam reinforcing metal fitting, for example, there is a beam reinforcing metal fitting which is a ring-shaped member and is joined to a through hole formed in the beam (for example, Patent Document 1).

JP-A-2009-167615

After installing the beam reinforcing metal fittings on the beam, reinforcing bars are arranged around the beam and concrete is poured. At this time, a void pipe, which is a tubular member, is attached so that the penetrating portion to which the beam reinforcing metal fitting is attached is not filled with concrete. That is, the void pipe functions as a formwork when placing concrete.

When installing the void pipe in the through hole, for example, a method is adopted in which the void pipe is installed on both sides of the beam and the void pipe is fixed to the beam reinforcing metal fitting or the beam. At this time, if the positions and orientations of the void pipes on both sides of the beam are deviated, the subsequent concrete placing work and pipe installation work may be adversely affected.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a beam reinforcing metal fitting and a beam reinforcing method in which a tubular member can be easily installed.

In order to achieve the above-mentioned object, the first invention is a beam reinforcing metal fitting for reinforcing a beam having a through hole formed in a web, which protrudes to one side of a flange portion and the flange portion. A tubular main body portion to be inserted into the through hole is provided, a convex portion is formed on the opposite side of the main body portion with respect to the flange portion, and the width of the convex portion in the axial direction is the flange portion. It is a beam reinforcing metal fitting characterized by being smaller than the width of.

It is desirable that the width of the main body portion in the axial direction is larger than the width of the flange portion.

According to the first invention, by forming a convex portion on the side opposite to the main body portion with respect to the flange portion, the convex portion can be used for positioning the tubular member when the tubular member is subsequently attached. can.
In particular, if the convex portion has a cylindrical shape formed continuously in the circumferential direction, the same effect as substantially lengthening the tubular shape of the main body can be obtained, and the tubular member or the pipe is passed through. At that time, the length for supporting the cylindrical member or the pipe can be increased.

The second invention is a beam reinforcing structure using the beam reinforcing metal fitting according to the first invention, in which the outer peripheral portion of the flange portion is welded to the web in a state where the main body portion is inserted into the through hole. The beam reinforcing structure is characterized in that the portion of the main body portion protruding from the through hole is formed to be smaller than the combined width of the flange portion and the convex portion. A cylindrical member is attached to each of the convex portion and the portion of the main body portion protruding from the through hole as a guide, and the tubular member is fixed to a reinforcing bar arranged around the beam. It may be supported by a member.
Further, in the beam reinforcing structure using the beam reinforcing metal fitting of the first invention, the outer peripheral portion of the flange portion is welded to the web in a state where the main body portion is inserted into the through hole, and the main body portion of the main body portion is welded. The portion protruding from the through hole is formed to be smaller than the width of the flange portion and the convex portion combined, the tubular member is inserted through the beam reinforcing metal fitting and arranged, and the tubular member is the beam. The beam reinforcing structure may be characterized in that it is supported by a support member fixed to a reinforcing bar arranged around the beam.

A third invention is a beam reinforcing method using a beam reinforcing metal fitting according to the first invention, wherein the main body portion of the beam reinforcing metal fitting is inserted into a through hole formed in a web of the beam, and the beam is described. The beam reinforcing method is characterized in that a reinforcing metal fitting is welded to the beam, and a tubular member is attached to each of the convex portion and the portion of the main body portion protruding from the through hole as a guide. The cylindrical member may be supported by a support member fixed to a reinforcing bar arranged around the beam.

According to the third invention, when the beam reinforcing metal fitting is welded to the beam and the tubular member is attached, the convex portion can be used as a guide, so that the attachment position of the tubular member can be easily grasped. can.

According to the present invention, it is possible to provide a beam reinforcing metal fitting and a beam reinforcing method in which a cylindrical member can be easily installed.

The perspective view which shows the beam reinforcing metal fitting 1. It is a perspective view which shows the beam reinforcement structure 10, (a) is the figure which shows the back surface side, (b) is the figure which shows the front surface side. (A) is a front view showing the beam reinforcing structure 10, and (b) is a sectional view taken along line AA of (a). The figure which shows the other fixing structure of a beam reinforcing metal fitting 1. The front view which shows the state which installed the cylindrical member 21 in the beam reinforcement structure 10. FIG. 5 is a cross-sectional view showing a state in which the tubular member 21 is installed on the beam reinforcing structure 10. FIG. 5 is a cross-sectional view showing another state in which the cylindrical member 21 is installed on the beam reinforcing structure 10. (A) is a front view showing a beam reinforcing structure 10a, and (b) is a sectional view taken along line BB of (a). The front view which shows the beam reinforcement structure 10b.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a perspective view showing a beam reinforcing metal fitting 1 according to the first embodiment. The beam reinforcing metal fitting 1 is composed of a main body portion 3, a flange portion 5, a convex portion 7, and the like. The beam reinforcing metal fitting 1 is a member for reinforcing a beam having a through hole formed in the web.

The beam reinforcing metal fitting 1 is a metal member such as a steel material or stainless steel. The beam reinforcing metal fitting 1 is a ring-shaped member as a whole, and has a piping hole through which a pipe or the like penetrates. The flange portion 5 is a portion having a larger outer diameter than the main body portion 3 and the convex portion 7. A cylindrical main body 3 is arranged on one side of the flange 5. The main body portion 3 is a portion that protrudes to one side of the flange portion 5 and is inserted into a through hole of a beam described later.

A convex portion 7 is arranged on the other side of the flange portion 5 (the side opposite to the main body portion 3). The convex portion 7 projects to the other side of the flange portion 5. The convex portion 7 is continuously formed in the circumferential direction over the entire circumference. That is, in the present embodiment, the convex portion 7 has a cylindrical shape as a whole.

The inner diameters of the main body 3, the flange 5, and the convex portion 7 are substantially the same, and no unevenness is formed on the inner peripheral surface. Further, the outer diameters of the main body portion 3 and the convex portion 7 may be substantially the same or different. For example, the outer diameter of the convex portion 7 may be larger or smaller than that of the main body portion 3.

Next, the beam reinforcing structure 10 using the beam reinforcing metal fitting 1 will be described. FIG. 2A is a perspective view seen from the back surface side (main body portion 3 side) of the beam reinforcing structure 10, and FIG. 2B is a perspective view seen from the front surface side (convex portion 7 side) of the beam reinforcing structure 10. It is a perspective view. Further, FIG. 3A is a front view of the beam reinforcing structure 10, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A.

The beam 11 is an H-steel having flanges 13 above and below the web 15. A through hole 17 for passing a pipe or the like is formed in the web 15. The beam reinforcing metal fitting 1 is arranged in the through hole 17. As described above, the main body 3 of the beam reinforcing metal fitting 1 is inserted into the through hole 17. The flange portion 5 comes into surface contact with the web 15 near the edge of the through hole 17.

The beam reinforcing metal fitting 1 is joined to the web 15 by welding. In the present embodiment, the outer peripheral portion of the flange portion 5 is welded to the web 15 over the entire circumference. That is, the welded portion 19 is formed between the outer peripheral portion of the flange portion 5 and the surface of the web 15.

Next, a beam reinforcing method (construction method of the beam reinforcing structure 10) using the beam reinforcing metal fitting 1 will be described. First, the main body 3 of the beam reinforcing metal fitting 1 is inserted from one side of the beam 11. At this time, the flange portion 5 of the beam reinforcing metal fitting 1 has an outer diameter larger than that of the through hole 17 provided in the beam 11. Further, the main body portion 3 has an outer diameter smaller than the diameter of the through hole 17 provided in the beam 11. Therefore, when the main body portion 3 is inserted into the through hole 17, the flange portion 5 can be brought into contact with the web 15. That is, the flange portion 5 is used for axial positioning when the beam reinforcing metal fitting 1 is inserted into the through hole 17.

Further, when aligning the beam reinforcing metal fitting 1 with respect to the radial direction of the through hole 17, the operator can easily align the beam reinforcing metal fitting 1 by using the convex portion 7. For example, the through hole 17 is not completely circular and has burrs and the like on the edge portion, but the convex portion 7 can be used as a gripping portion for a tool or an operator, and the flange portion 5 is surely attached to the web 15. The position of the beam reinforcing metal fitting 1 can be aligned with the position of surface contact.

After the position of the beam reinforcing metal fitting 1 is determined, the beam reinforcing metal fitting 1 is temporarily fixed to the web 15 by a clamp or the like, and in this state, the beam reinforcing metal fitting 1 is welded to the periphery or the edge of the through hole 17. Welding is performed, for example, by shielded metal arc welding.

The main body 3 side may be welded instead of the flange 5 side. FIG. 4 is a diagram showing a state in which the main body 3 side is welded. In this case, first, the beam reinforcing metal fitting 1 is inserted into the through hole 17, and the beam 11 is inverted from the flange portion 5 side with a clamp or the like temporarily fixed, and the main body portion 3 is viewed from the main body portion 3 side. It is integrated with the beam 11 by the welded portion 19 over the entire circumference of the beam 11. Before reversing the beam 11, if necessary, the outer peripheral portion of the flange portion 5 is spot-welded to the web 15 from the flange portion 5 side of the beam reinforcing metal fitting 1, and the beam reinforcing metal fitting 1 is spot-welded to the web 15. It may be temporarily fixed.

In this case, the outer peripheral surface of the main body 3 may be tapered. For example, by forming a tapered shape on the outer peripheral portion of the main body portion 3 so that the outer diameter gradually decreases from the flange portion 5 side toward the tip end side, it can be used as a groove at the time of welding. In this case, the welded portion 19 is formed between the main body portion 3 and the inner surface of the through hole 17.

As described above, the welded portion 19 may be provided on either side as described above, or may be provided on both sides. In any case, when the beam reinforcing metal fitting 1 is installed on the beam 11 and temporarily fixed, the pressing position can be grasped by the convex portion 7. From the above, the beam reinforcing structure 10 can be obtained. The beam reinforcing metal fitting 1 can improve the bending strength in the vicinity of the through hole 17 of the beam 11.

Next, the tubular member 21 is installed at the portion of the beam reinforcing metal fitting 1. FIG. 5 is a front view of the state in which the tubular member 21 is installed, and FIG. 6 is a cross-sectional view. The tubular member 21 is arranged on both sides of the beam 11. Further, a plurality of reinforcing bars 23 are arranged around the beam 11.

The support member 25 is fixed to the reinforcing bar 23. The cylindrical member 21 is supported by the support member 25. The material of the tubular member 21 is not particularly limited, such as metal, paper, or resin. When the tubular member 21 is made of metal, the tubular member 21 is joined to the beam 11 or the beam reinforcing metal fitting 1 by welding.

Here, when the tubular member 21 is installed on the convex portion 7 side of the beam 11, the end portion of the tubular member 21 is arranged so as to be inserted into the convex portion 7 of the beam reinforcing metal fitting 1. By doing so, the positioning of the tubular member 21 can be easily performed, and the displacement of the tubular member 21 can be suppressed. That is, the convex portion 7 can function as a guide for positioning and preventing slippage when the tubular member 21 is installed. When the tubular member 21 is installed on the main body 3 side of the beam 11, the end of the tubular member 21 may be arranged so as to be inserted into the main body 3 of the beam reinforcing metal fitting 1.

In this state, by closing the end portion of the tubular member 21 and placing concrete 27 (see FIG. 7) as needed, a reinforced concrete beam can be formed without closing the through hole 17.

As shown in FIG. 7, the cylindrical member 21 may be arranged so as to be inserted into the beam reinforcing metal fitting 1. In this case, the convex portion 7 does not function as a guide when the tubular member 21 is installed, but the support length of the tubular member 21 can be secured by forming the convex portion 7. Therefore, the inclination of the tubular member 21 can be suppressed.

As described above, according to the present embodiment, the beam 11 having the through hole 17 can be efficiently reinforced. Further, when the cylindrical member 21 is installed on the beam 11 after the beam reinforcing metal fitting 1 is fixed, the convex portion 7 can function as a guide for positioning the cylindrical member 21. Therefore, the installation work of the cylindrical member 21 becomes easy.

Further, since the convex portion 7 is continuously formed in the circumferential direction, when the tubular member 21 or the pipe is inserted into the beam reinforcing metal fitting 1, the length for supporting the tubular member 21 or the like can be lengthened. ..

Even if the main body portion 3 is lengthened without forming the convex portion 7, the support length of the pipe can be similarly secured, but the distance from the welded portion 19 to the tip of the main body portion 3 becomes long. .. Therefore, when a force is applied to the cylindrical member 21 or the pipe inserted through the beam reinforcing metal fitting 1 in the direction in which the tubular member 21 or the like is tilted, the moment applied to the welded portion 19 becomes large.

On the other hand, by forming the convex portion 7 on the opposite side of the flange portion 5 to increase the total length, the length from the welded portion 19 to the tip portion of the beam reinforcing metal fitting 1 can be suppressed. Therefore, even when a force is applied to the tubular member 21 or the like, the force applied to the welded portion 19 can be suppressed.

(Second Embodiment)
Next, the second embodiment will be described. 8 (a) is a front view showing a beam reinforcing structure 10a using the beam reinforcing metal fitting 1a, and FIG. 8 (b) is a sectional view taken along line BB of FIG. 8 (a). In the following description, the same reference numerals as those in FIGS. 1 to 7 will be added to the configurations having the same functions as those of the beam reinforcing metal fitting 1 and the beam reinforcing structure 10, and duplicate description will be omitted.

The beam reinforcing metal fitting 1a has almost the same structure as the beam reinforcing metal fitting 1, but differs in that a concave portion 7a is provided instead of the convex portion 7. The recesses 7a are formed continuously in the circumferential direction. For example, the outer diameter of the recess 7a substantially coincides with the outer diameter of the main body 3. The outer diameter of the recess 7a may be larger or smaller than the outer diameter of the main body 3.

In this case, the cylindrical member 21 can be arranged so as to be inserted inside the recess 7a. Therefore, the recess 7a can function as a guide for positioning the cylindrical member 21.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. As described above, the guide of the tubular member 21 may be a convex portion 7 or a concave portion 7a.

(Third Embodiment)
Next, a third embodiment will be described. FIG. 9 is a front view showing the beam reinforcing structure 10b. The beam reinforcing structure 10b has almost the same structure as the beam reinforcing structure 10, except that the beam reinforcing metal fitting 1b is used.

The convex portion 7 of the beam reinforcing metal fitting 1b is intermittently arranged in the circumferential direction. In this way, the convex portion 7 whose holding position can be grasped does not have to be formed over the entire circumference.

According to the third embodiment, the same effect as that of the first embodiment can be obtained. As described above, the guide of the tubular member 21 does not have to be formed continuously over the entire circumference in the circumferential direction.

In the first to third embodiments, an example in which the tubular member 21 which is a so-called void tube is used has been described, but the present invention is not limited to this. Needless to say, even when the tubular member 21 is not used, the beam reinforcing effect can be obtained by using the beam reinforcing metal fittings 1, 1a and 1b as a single body.

Although the embodiment of the present invention has been described above with reference to the attached drawings, the technical scope of the present invention does not depend on the above-described embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

1, 1a, 1b ………… Beam reinforcing metal fittings 3 ………… Main body 5 ………… Flange 7 ………… Convex 7a ………… Recessed 10, 10a, 10b ………… Beam reinforcing structure 11 ………… Beam 13 ………… Flange 15 ………… Web 17 ………… Through hole 19 ………… Welded part 21 ………… Cylindrical member 23 ………… Reinforcing bar 25 ………… Support member 27 ………… Concrete

Claims (7)

A beam reinforcing metal fitting for reinforcing a beam having a through hole in the web.
Flange part and
A cylindrical main body that protrudes to one side of the flange and is inserted into the through hole.
Equipped with
A convex portion is formed on the opposite side of the main body portion with respect to the flange portion.
A beam reinforcing metal fitting characterized in that the width of the convex portion in the axial direction is smaller than the width of the flange portion. The beam reinforcing metal fitting according to claim 1, wherein the width of the main body portion in the axial direction is larger than the width of the flange portion. The beam reinforcing structure using the beam reinforcing metal fitting according to claim 1 or 2, wherein the outer peripheral portion of the flange portion is welded to the web in a state where the main body portion is inserted into the through hole. A beam reinforcing structure characterized in that a portion of the main body portion protruding from the through hole is formed to be smaller than the combined width of the flange portion and the convex portion. A tubular member is attached to each of the convex portion and the portion of the main body portion protruding from the through hole as a guide, and the tubular member is fixed to a reinforcing bar arranged around the beam. The beam reinforcing structure according to claim 3, wherein the beam is supported by a member. The beam reinforcing structure using the beam reinforcing metal fitting according to claim 2, wherein the outer peripheral portion of the flange portion is welded to the web in a state where the main body portion is inserted into the through hole, and the main body portion is described. The portion protruding from the through hole is formed to be smaller than the combined width of the flange portion and the convex portion.
A beam reinforcing structure characterized in that a tubular member is inserted through a beam reinforcing metal fitting and arranged, and the tubular member is supported by a supporting member fixed to a reinforcing bar arranged around the beam. A beam reinforcing method using the beam reinforcing metal fitting according to claim 1 or 2.
The main body portion of the beam reinforcing metal fitting is inserted into a through hole formed in the web of the beam, the beam reinforcing metal fitting is welded to the beam, and the convex portion and the portion of the main body portion protruding from the through hole are formed. A beam reinforcement method characterized in that a tubular member is attached to each as a guide. The beam reinforcing method according to claim 6, wherein the cylindrical member is supported by a support member fixed to a reinforcing bar arranged around the beam.

Images