JP7210333B2 - Beam reinforcement brackets and beam reinforcement structures - Google Patents

Description

TECHNICAL FIELD The present invention relates to a beam reinforcing metal fitting and a beam reinforcing structure for reinforcing a beam having through-holes in a building structure.

Conventionally, through-holes are sometimes formed in beams of building structures for the passage of pipes and wiring. In this case, the through holes reduce the bending resistance of the beam. In order to prevent this deterioration of the bending strength of the beams, beam reinforcing metal fittings are attached to the beams to reinforce the beams.

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 a beam (for example, Patent Document 1).

JP 2009-167615 A

However, when using a conventional beam reinforcing metal fitting, there is almost no difference between the outer diameter of the insertion side end of the ring-shaped main body and the inner diameter of the through hole. It is necessary to start inserting into the through-hole of the main body with the If the axial direction of the main body is tilted with respect to the axial direction of the through-hole at the start of insertion, the main body will get caught in the through-hole in the middle of the insertion, preventing smooth operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a beam reinforcing metal fitting and a beam reinforcing structure which are easy to work when inserted into a through-hole of a beam.

In order to achieve the above object, a first invention is a beam reinforcing fitting for reinforcing a beam having through holes formed in a web, comprising: a flange portion; a cylindrical main body inserted into the through-hole, wherein the main body does not have the same length in the circumferential direction, but the long region and the short region of the main body are divided by the center line of the main body. The beam reinforcing metal fitting is characterized by being separable.

The length of the main body portion may change in a tapered shape when viewed from the side.
Alternatively, the main body portion may have a step in a side view, and the length may vary depending on the step.

In the beam reinforcing metal fitting of the first invention, the main body portion does not have the same length in the circumferential direction, but can be divided into a long region and a short region of the main body portion by the center line of the main body portion. With the main body tilted in the axial direction, insertion into the through-hole can be started from the long region of the main body. Thereafter, by inserting the long region of the main body along the through-hole, the axial direction of the through-hole can be easily aligned with the axial direction of the main body before inserting the short region of the main body. Therefore, the entire body can be smoothly inserted into the through hole.

If the length of the main body changes in a tapered shape when viewed from the side, or if the length of the main body changes due to steps when viewed from the side, the main body can be easily divided into a long region and a short region. .

A second invention is a beam reinforcing structure using the beam reinforcing metal fitting of the first invention, wherein 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 structure is characterized in that the beam reinforcing metal fitting is welded to the beam.

in the long region of the body portion, the body portion protrudes to the back side of the web;
In the short region of the body portion, the body portion may not protrude to the rear side of the web.

According to the second aspect of the invention, since the main body does not have the same length in the circumferential direction but uses a beam reinforcing metal fitting that can be divided into a long region and a short region of the main body by the center line of the main body, By starting to insert the long region along the through-hole, the entire main body can be smoothly inserted into the through-hole.

If the short region of the main body does not protrude to the rear side of the web, most of the main body can be inserted into the through-hole with the main body tilted.

ADVANTAGE OF THE INVENTION According to this invention, the beam reinforcement metal fitting and beam reinforcement structure with the favorable workability|operativity at the time of inserting into the through-hole of a beam can be provided.

The perspective view which shows the beam reinforcement metal fitting 1. FIG. It is a perspective view which shows the beam reinforcement structure 10, (a) is a figure which shows a back side, (b) is a figure which shows a front side. The front view which shows the beam reinforcement structure 10. FIG. FIG. 4 is a cross-sectional view along the line AA of FIG. 3; The figure which shows the insertion method to the through-hole 17 of the beam reinforcement metal fitting 1. FIG. The perspective view which shows the beam reinforcement structure 10a.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a beam reinforcing metal fitting 1 according to this embodiment. The beam reinforcing metal fitting 1 is composed of a body portion 3, a flange portion 5, and the like. A beam reinforcing metal fitting 1 is a member for reinforcing a beam having through holes formed in a web.

The beam reinforcing metal fitting 1 is, for example, a member made of metal such as steel or stainless steel. The beam reinforcing metal fitting 1 is a ring-shaped member as a whole, and has a piping hole through which piping or the like passes. The body portion 3 is provided so as to protrude from one side of the flange portion 5 . The body portion 3 is a cylindrical portion that is inserted into a through hole of a beam, which will be described later.

The body portion 3 does not have the same length in the circumferential direction. That is, the length of the main body 3 in the axial direction of the cylinder varies depending on the position in the circumferential direction. The length of the main body portion 3 changes in a tapered shape when viewed from the side. The body portion 3 can be divided into a long region X and a short region Y in the axial direction of the cylinder by a center line (a radial line indicated by a dotted line in FIG. 1).

Note that the flange portion 5 has a larger outer diameter than the body portion 3 . The inner diameters of the main body portion 3 and the flange portion 5 are substantially the same, and no unevenness is formed on the inner peripheral surface.

Next, the beam reinforcing structure 10 using the beam reinforcing metal fittings 1 will be described. 2(a) is a perspective view of the beam reinforcing structure 10 viewed from the rear surface 15b side of the web 15, and FIG. 2(b) is a perspective view of the beam reinforcing structure 10 viewed from the front surface 15a side of the web 15. be. 3 is a front view of the beam reinforcing structure 10, and FIG. 4 is a sectional view taken along the line AA of FIG.

The beam 11 is H steel with flanges 13 above and below the web 15 . The web 15 is formed with a through hole 17 for passing a pipe or the like. The beam reinforcing metal fitting 1 is arranged in the through hole 17 . As described above, the body portion 3 of the beam reinforcing metal fitting 1 is inserted into the through hole 17 . The flange portion 5 makes surface contact with the web 15 near the edge of the through hole 17 . Thus, even if there is a burr or the like on the edge of the through hole 17, it can be hidden by the beam reinforcing metal fitting 1. - 特許庁

In the long region X of the main body portion 3 of the beam reinforcing metal fitting 1, the main body portion 3 as a whole protrudes toward the rear surface 15b of the web 15. As shown in FIG. At least a portion of the body portion 3 does not protrude toward the rear surface 15 b of the web 15 in the short region Y of the body portion 3 .

The beam reinforcing metal fitting 1 is joined to the web 15 by welding. In this 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 front surface 15 a of the web 15 .

Next, a beam reinforcement method using the beam reinforcement fitting 1 (construction method of the beam reinforcement structure 10) will be described. 5A and 5B are diagrams showing a method of inserting the beam reinforcing metal fitting 1 into the through hole 17. FIG. First, the beam 11 is temporarily placed in the working yard so that the front 15a side of the web 15 faces upward.

Then, as shown in FIG. 5(a), in a state in which the axial direction of the body portion 3 is inclined with respect to the axial direction of the through hole 17, the longest portion of the region X of the body portion 3 of the beam reinforcing metal fitting 1 is The end portion is inserted into the through hole 17 from the front surface 15a side of the web 15 of the beam 11 . After that, the beam reinforcing metal fitting 1 is moved in the direction indicated by the arrow B while the long region X of the main body portion 3 is used as a guide along the inner peripheral surface of the through hole 17 .

After inserting the main body 3 into the through hole 17 to some extent using the long region X as a guide, before inserting the short region Y, the main body 3 is rotated in the direction of arrow C as shown in FIG. The axial direction of the through hole 17 and the axial direction of the body portion 3 are aligned. Then, the entire body portion 3 is arranged in the through hole 17 by inserting the short region Y. As shown in FIG.

At this time, the flange portion 5 of the beam reinforcing metal fitting 1 has a larger outer diameter than the through hole 17 provided in the beam 11 . Further, the body portion 3 has an outer diameter smaller than the diameter of the through hole 17 provided in the beam 11 . Therefore, when the 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 inserting the beam reinforcing metal fitting 1 into the through hole 17 .

After the position of the beam reinforcing metal fitting 1 is determined, a welded portion 19 is formed between the outer peripheral portion of the flange portion 5 and the front face 15a of the web 15 from the front face 15a side of the web 15 to fix the beam reinforcing metal fitting 1 to the web 15. do. Welding is performed, for example, by shielded arc welding.

As described above, the beam reinforcing structure 10 can be obtained. The beam reinforcing metal fitting 1 can improve the bending strength of the beam 11 in the vicinity of the through hole 17 .

As described above, according to the present embodiment, the main body portion 3 of the beam reinforcing metal fitting 1 does not have the same length in the circumferential direction, but can be divided into the long region X and the short region Y by the center line of the main body portion 3. Therefore, the insertion of the beam reinforcing metal fitting 1 into the through-hole 17 can be started from the long region X of the main body 3 with the axial direction of the main body 3 inclined with respect to the axial direction of the through-hole 17 . After that, if the body portion 3 is inserted along the through hole 17 using the long region X of the body portion 3 as a guide, the axial direction of the through hole 17 and the axial direction of the body portion 3 are inserted before the short region Y of the body portion 3 is inserted. can be easily matched. Therefore, when inserting the short region Y of the body portion 3 into the through hole 17 , the beam reinforcing metal fitting 1 can be smoothly arranged in the through hole 17 without being caught around the through hole 17 .

In addition, in the beam reinforcing structure 10, since the short region Y of the body portion 3 does not protrude toward the rear surface 15b of the web 15, most of the body portion 3 can be inserted into the through hole 17 while the body portion 3 is tilted. can. Therefore, insertion into the through-hole 17 is easier than in the case where the main body portion 3 as a whole protrudes toward the back surface 15b.

(Second embodiment)
Next, a second embodiment will be described. FIG. 6 is a perspective view showing the beam reinforcing structure 10a. In the following description, structures having the same functions as those of the beam reinforcing metal fitting 1 and the beam reinforcing structure 10 are denoted by the same reference numerals as in FIGS. 1 to 5, and duplicate descriptions are omitted.

A beam reinforcing structure 10a shown in FIG. 6 differs from the beam reinforcing metal fitting 1 in that the beam reinforcing metal fitting 1a is used.

The beam reinforcing metal fitting 1a, like the beam reinforcing metal fitting 1, does not have the same length in the circumferential direction. The body portion 3 has steps in a side view, and the length changes according to the steps. The main body 3 can be divided into a long region X and a short region Y in the axial direction of the cylinder by a center line (an axial line indicated by a dotted line in FIG. 6). The body portion 3 has a constant length in the region X, and a constant length in the region Y as well.

In the long region X of the main body portion 3 of the beam reinforcing metal fitting 1a, the main body portion 3 as a whole protrudes toward the rear surface 15b of the web 15. As shown in FIG. Further, in the region Y where the length of the main body portion 3 is short, the main body portion 3 as a whole does not protrude toward the rear surface 15 b of the web 15 .

In order to construct the beam reinforcing structure 10a, the axial direction of the main body portion 3 is tilted with respect to the axial direction of the through hole 17, and the region X of the main body portion 3 of the beam reinforcing metal fitting 1a that is the farthest from the center line. Insert the end of the section into the through hole 17 . After that, after inserting the body portion 3 into the through hole 17 to some extent along the inner peripheral surface of the through hole 17 using the long region X as a guide, the body portion 3 is rotated to move the body portion 3 between the axial direction of the through hole 17 and the body portion 3. match the axial direction. Then, the entire body portion 3 is arranged in the through hole 17 by inserting the short region Y. As shown in FIG.

Also in the second embodiment, since the main body portion 3 of the beam reinforcing metal fitting 1a does not have the same length in the circumferential direction, the same effect as in the first embodiment can be obtained.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not influenced by the above-described embodiments. It is obvious that a person skilled in the art can conceive various modifications or modifications within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. be understood to belong to

For example, the main body portion 3 of the beam reinforcing metal fitting is not limited to a cylindrical shape. For example, when the through-hole is rectangular, a beam reinforcing metal fitting having a flange portion 5 formed at the end portion of the main body portion 3 in the shape of a rectangular tube may be used.

In addition, in the beam reinforcing structure, the short region Y of the main body portion 3 of the beam reinforcing metal fitting may protrude toward the rear surface 15 b of the web 15 . In this case as well, after inserting the beam reinforcing metal fitting 1 into the through-hole 17 with the long region X of the main body 3 as a guide in a state in which the axial direction of the main body 3 is inclined with respect to the axial direction of the through-hole 17, The short region Y of the body portion 3 can be inserted into the through hole 17 by aligning the axial direction of the through hole 17 with the axial direction of the body portion 3 .

In the beam reinforcing structures 10 and 10a, the beam reinforcing metal fittings are arranged so that the long region X of the main body portion 3 is located in the upper half of the through hole 17, but the orientation of the beam reinforcing metal fittings is not limited to this. For example, the beam reinforcing metal fitting may be arranged so that the short region Y of the main body portion 3 is positioned in the upper half portion of the through hole 17 .

Further, the boundary position between the long region X and the short region Y of the body portion 3 does not necessarily have to be the center line O position. For example, when forming a step, the position of the step does not have to be the position of the center line O of the main body 3, but may be a position shifted from the center line O (for example, a position shifted in the vertical direction in FIG. 6). may Further, even when the tapered shape is used, the entire body portion 3 does not have to be tapered. can be shortened to That is, being able to divide the main body 3 into a long region X and a short region Y by the center line O of the main body 3 means that the average length of the main body 3 on one side of the center line O is long and the average length on the other side is long. It suffices if it can be divided so that the average length of the main body portion 3 of is relatively short.

Reference Signs List 1, 1a Beam reinforcing metal fittings 3 Body portion 5 Flange portions 10, 10a Beam reinforcing structure 11 Beam 13 Flange 15 Web 15a Front 15b …… Back surface 17 …… Through hole 19 …… Welding part

Claims (5)

A beam reinforcing fitting for reinforcing a beam having through holes formed in a web,
a flange portion;
a cylindrical main body portion protruding to one side of the flange portion and inserted into the through hole;
and
A beam reinforcing metal fitting according to claim 1, characterized in that the main body portion does not have the same length in the circumferential direction, but can be divided into a long region and a short region of the main body portion by a center line of the main body portion. 2. The beam reinforcing metal fitting according to claim 1, wherein the length of the main body changes in a tapered shape when viewed from the side. 2. The beam reinforcing metal fitting according to claim 1, wherein the main body portion has a step in a side view, and the length of the step changes according to the step. A beam reinforcing structure using the beam reinforcing metal fitting according to any one of claims 1 to 3,
A beam reinforcing structure, wherein the beam reinforcing metal fitting is welded to the beam while the body portion of the beam reinforcing metal fitting is inserted into a through hole formed in a web of the beam. in the long region of the body portion, the body portion protrudes to the back side of the web;
5. The beam reinforcing structure according to claim 4, wherein the main body portion does not protrude to the rear side of the web in the short region of the main body portion.

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