JP2020176494A - Beam reinforcement fitting, beam reinforcement structure and beam reinforcement method - Google Patents

Abstract

To provide a beam reinforcement fitting, a beam reinforcement structure, and a beam reinforcement method capable of preparing for attaching a net at the same time as reinforcing the beam.SOLUTION: A beam reinforcement fitting 1 comprises a main body portion 3, a flange portion 5, and the like. The beam reinforcement fitting 1 is a member for reinforcing a beam having a through hole formed in a web. The beam reinforcement fitting 1 is a ring-shaped member as a whole, and has a piping hole 4 through which a pipe or the like penetrates. The main body portion 3 is a tubular portion to be inserted into a through hole of a beam described later. A flange portion 5 is provided near one end of the main body portion 3. The flange portion 5 is a portion having a larger outer diameter than the main body portion 3, and a notch portion 7 is provided on one end surface (end surface of the flange portion 5) of the beam reinforcement fitting 1. By bending the notch portion 7 toward the lower side of an opening portion, an edge portion of the opening portion can be projected relatively upward, and it can function as a locking claw 6 on which a fall prevention net can be hung.SELECTED DRAWING: Figure 1

Description

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

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).

Further, when constructing a building structure, a fall prevention net is hooked on a hook attached to a pillar or a beam to prevent an object or a worker from falling during the work (for example, Patent Document 2).

JP-A-2009-167615 Japanese Unexamined Patent Publication No. 2004-232351

However, when the beam is reinforced using conventional beam reinforcement fittings and the above-mentioned fall prevention net is hooked on the hook provided on the column or beam, the hook is attached to the column or beam at the site or the hook is removed after using the net. Because of this, the work process increases.

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, a beam reinforcing structure, and a beam reinforcing method capable of preparing for attachment of a net at the same time as reinforcing a beam.

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, and is a piping hole inserted into the through hole and inserted into the inside. It is characterized in that a notch portion capable of hanging a net is formed on at least one end face of the beam reinforcing metal fitting or the outer peripheral portion on the at least one end side. It is a beam reinforcing metal fitting.

A flange portion that protrudes in the radial direction is provided in the vicinity of the end portion of the main body portion, and the notch portion may be formed on the end surface of the flange portion or the outer peripheral surface of the flange portion.

The notch portion opens in one end surface of the beam reinforcing metal fitting, and when viewed from the end face side, a part of the internal space of the notch portion cannot be seen from the opening, and the edge portion of the opening portion. Is desirable to function as a locking claw for the net.

The direction of the locking claw formed at the edge of the opening of the notch may be formed so as to face two opposite directions.

A pair of the notches may be formed on one end surface of the beam reinforcing metal fitting with the piping hole interposed therebetween, and the pair of the notches may be formed in a straight line when viewed from the end face.

The notch portion may be a groove formed in the circumferential direction on the outer peripheral portion of the beam reinforcing metal fitting.

According to the first invention, since it is possible to hang a net on the notch portion, it is possible to prepare for attaching the net at the same time as reinforcing the beam by welding the beam reinforcing metal fitting to the beam. Therefore, it is possible to reduce the installation of separate hooks for the net and the like.

Further, if a flange portion that protrudes in the radial direction is provided near the end portion of the main body portion, the range in which the notch portion can be formed becomes wide. Further, when the beam reinforcing metal fitting is inserted into the through hole, the axial positioning can be performed by the flange portion.

Further, when the notch is formed on the end face of the beam reinforcing metal fitting, the opening edge of the notch is a locking claw on which the net can be hung, thereby more surely suppressing the net from falling off. be able to.

At this time, by forming the locking claws in the upper and lower directions, the direction of installing the beam reinforcing metal fittings is not mistaken.

Further, by forming a pair of notches on one end surface of the beam reinforcing metal fitting in a straight line with the piping hole interposed therebetween, the net can be hung at a plurality of places.

Further, even if a groove-shaped notch is formed on the outer peripheral surface of the beam reinforcing metal fitting, the net can be hung in the groove.

The second invention is a beam reinforcing structure using the beam reinforcing metal fittings of the first invention, in which the main body is inserted into a through hole formed in the web of the beam and welded to the beam to cut the beam. It is a beam reinforcement structure characterized in that a net is hung on the notch.

According to the second invention, since the beam reinforcing metal fitting having the notch portion on which the net can be hung is used, the preparation for attaching the net is completed at the same time as the beam is reinforced by welding the beam reinforcing metal fitting to the beam. You can hang a net on the notch.

A third invention is a beam reinforcing method using a beam reinforcing metal fitting of the first invention, in which the main body is inserted into a through hole formed in a web of a beam, welded to the beam, and cut. This is a beam reinforcement method characterized by hanging a net on the notch.

According to the third invention, since the notch is formed in the beam reinforcing metal fitting, by welding the beam reinforcing metal fitting to the beam, the preparation for attaching the net is completed at the same time as the beam is reinforced, and the net is made in the notch. It is easy to work because it can be hung.

According to the present invention, it is possible to provide a beam reinforcing metal fitting, a beam reinforcing structure, and a beam reinforcing method that can prepare for attaching a net at the same time as reinforcing the beam.

The perspective view which shows the beam reinforcing metal fitting 1. (A) is a front view showing the beam reinforcing metal fitting 1, and (b) is a side view showing 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 side, (b) is the figure which shows the front side. The front view which shows the beam reinforcement structure 10. (A) and (b) are diagrams showing other forms of the notch portion. (A) to (d) are diagrams showing still other forms of the notch portion. (A) is a rear view showing the beam reinforcing metal fitting 1a, and (b) is a side view showing the beam reinforcing metal fitting 1a. The perspective view which shows the beam reinforcement metal fitting 1b. (A) is a front view showing a beam reinforcing metal fitting 1b, and (b) is a side view showing a beam reinforcing metal fitting 1b. The front view which shows the beam reinforcement structure 10a. (A) is a cross-sectional view of the beam reinforcing metal fitting 1b in a used state, and (b) is a cross-sectional view of the beam reinforcing metal fitting 1c in a used state.

(First Embodiment)
1A and 1B are perspective views showing a beam reinforcing metal fitting 1 according to the present embodiment, FIG. 2A is a front view, and FIG. 2B is a side view. The beam reinforcing metal fitting 1 is composed of a main body portion 3, a flange portion 5, 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 4 through which a pipe or the like penetrates. The main body 3 is a tubular portion to be inserted into a through hole of a beam described later. A flange portion 5 is provided near one end of the main body portion 3. The flange portion 5 has a larger outer diameter than the main body portion 3, and projects in the radial direction of the main body portion 3. The inner diameters of the main body 3 and the flange 5 are substantially the same, and no unevenness is formed on the inner peripheral surface.

A notch 7 is provided on one end surface (end surface of the flange portion 5) of the beam reinforcing metal fitting 1. In the present invention, the end face means a ring-shaped surface at both ends of the beam reinforcing metal fitting 1 in the axial direction.

A pair of notches 7 are formed on one end surface of the beam reinforcing metal fitting 1 with the piping holes 4 interposed therebetween. At this time, a pair of notches 7 are formed in a straight line when viewed from the end face.

Further, the notch portion 7 is formed by bending in a substantially L shape in the depth direction (axial direction of the beam reinforcing metal fitting 1). That is, the notch portion 7 opens in one end face of the beam reinforcing metal fitting 1, and when viewed from the end face side, a part of the L-shaped internal space of the notch portion 7 can be seen from the opening. Formed so that there is no. By bending the inside of the notch 7 toward the lower side of the opening, the edge of the opening can be projected relatively upward, and the portion can be projected toward the upper side. Can function as a locking claw 6 on which the hook can be hung.

Next, the beam reinforcing structure 10 using the beam reinforcing metal fitting 1 will be described. FIG. 3A is a perspective view of the beam reinforcing structure 10 viewed from the back surface 15b side of the web 15, and FIG. 3B is a perspective view of the beam reinforcing structure 10 viewed from the front surface 15a side of the web 15. is there. Further, FIG. 4 is a front view of the beam reinforcing structure 10.

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. As a result, 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.

The beam reinforcing metal fitting 1 is arranged so that the locking claw 6 faces upward. That is, in the side view, the beam reinforcing metal fitting 1 is arranged so that the L-shaped notch portion 7 bends from the opening side to the lower side. At this time, the pair of notch portions 7 are arranged in a straight line in the substantially horizontal direction when viewed from the end surface side of the beam reinforcing metal fitting 1.

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 front surface 15a of the web 15.

In the beam reinforcing structure 10, a fall prevention net 9 is hung on the notch 7 of the beam reinforcing metal fitting 1. Further, the beam 11 is provided with a hook 8 on the back surface 15b side of the web 15, and a net 9 for preventing falling is hung on the hook 8. The net 9 hung on the notch 7 and the net 9 hung on the hook 8 are arranged so as to cover the edge of the flange 13 on the lower side of the beam 11, and objects are placed on the side of the beam 11 during work. And prevent workers from falling.

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 beam 11 is temporarily placed in the work yard so that the front surface 15a side of the web 15 faces upward, and the main body 3 of the beam reinforcing metal fitting 1 is inserted into the through hole 17 from the front surface 15a side of the web 15 of the beam 11. The beam reinforcing metal fitting 1 is arranged so that the locking claw 6 faces the direction of the flange 13 on the upper 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.

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 surface 15a of the web 15 from the front surface 15a side of the web 15, and the beam reinforcing metal fitting 1 is fixed to the web 15. To do. Welding is performed, for example, by shielded metal arc welding.

After welding the beam reinforcing metal fitting 1 to the beam 11, the beam 11 is installed at the site. That is, the beam 11 is joined to the joint portion with the column (not shown). Then, the net 9 for fall prevention is hung on the notch portion 7 (locking claw 6) formed in the beam reinforcing metal fitting 1. Further, the net 9 is also hung on the hook 8 attached to the back surface 15b side of the web 15. The hook 8 may be attached in advance to the back surface 15b of the web 15, or may be attached in the field.

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. In the welding, the flange portion 5 and the web 15 may be welded from the front surface 15a side of the web 15, or the main body portion 3 and the web 15 may be welded from the back surface 15b side of the web 15.

As described above, according to the present embodiment, since the notch portion 7 is formed on the end surface of the flange portion 5 of the beam reinforcing metal fitting 1, it is possible to hang the net 9 for fall prevention. Therefore, by welding the beam reinforcing metal fitting 1 to the beam 11, the preparation for attaching the net 9 can be completed at the same time as the reinforcement of the beam 11. Further, as soon as the beam 11 is installed at the site, the net 9 can be hung on the notch portion 7 to take a fall prevention measure.

Further, since the notch portions 7 are formed in pairs with the piping hole 4 interposed therebetween, the net 9 can be hung at two places. In this way, by hanging the net 9 on a plurality of notches 7, the weight applied to one notch 7 can be dispersed and the net 9 can be spread and installed. Further, since the pair of notch portions 7 are formed in a straight line, the notch portions 7 can be easily formed.

In the present embodiment, the shape of the notch 7 in the side view is substantially L-shaped, but the shape is not limited to this. The shape of the notch portion 7 is not particularly limited as long as it has a shape on which the net 9 can be hung.

For example, as shown in FIG. 5A, a notch portion 7a on a straight line may be used without forming a bent portion. In this case, by forming the notch portion 7a diagonally with respect to the axial direction of the beam reinforcing metal fitting, a part of the internal space of the notch portion 7a is opened when viewed from the end face side. The edge of the opening can be made to function as a locking claw 6 facing upward, which is not visible from the outside.

Further, as shown in FIG. 5B, the cutout portion 7b may have an inclined surface only partially. Also in this case, by forming a slope in the internal space of the notch portion 7b with respect to the axial direction of the beam reinforcing metal fitting, a part of the internal space of the notch portion 7b is opened when viewed from the end face side. The edge of the opening can be made to function as a locking claw 6 facing upward, which is not visible from the outside.

In the beam reinforcing metal fitting 1 using the various notches described above, it is necessary to arrange the beam reinforcing metal fitting 1 so that the locking claw 6 faces upward. That is, the beam reinforcing metal fitting 1 described above needs to be oriented in the vertical direction when it is installed.

On the other hand, depending on the shape of the notch, the vertical orientation may be eliminated. The cutouts shown in FIGS. 6 (a) to 6 (b) have a shape that is substantially symmetrical in the vertical direction, and the opening is narrower than the internal space of the cutout. Is formed as follows. For example, the notch portion 7c shown in FIG. 6A has a substantially T-shaped cross section and bends in the vertical direction. Therefore, locking claws 6 are formed above and below the edge of the opening of the notch 7c. That is, the locking claws 6 are formed so as to face two opposite directions.

Similarly, the notch portion 7d shown in FIG. 6B is formed in a substantially V shape diagonally in two directions. Further, the cutout portion 7e shown in FIG. 6C has a substantially trapezoidal cross section, and slopes are formed at the top and bottom. Further, the notch portion 7f shown in FIG. 6D has a substantially circular cross section and has an opening smaller than the diameter.

By doing so, it can be used without worrying about the vertical direction of the beam reinforcing metal fittings. As described above, the shape of the notch portion is not particularly limited, and any form may be used as long as the net 9 can be hung.

(Second Embodiment)
Next, the second embodiment will be described. FIG. 7A is a rear view of the beam reinforcing metal fitting 1a, and FIG. 7B is a side view of the beam reinforcing metal fitting 1a. In the following description, the same reference numerals as those in FIGS. 1 to 6 will be given 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 structure of the beam reinforcing metal fitting 1a is different from that of the beam reinforcing metal fitting 1 in that the notch portion 7 is formed on both end faces of the beam reinforcing metal fitting 1a. That is, the notch portion 7 is formed on the end face of the flange portion 5 and the end face of the main body portion 3, respectively. In addition, instead of the notch portion 7, another form of notch portion may be applied.

Both the notch portion 7 formed in the flange portion 5 and the notch portion 7 formed in the main body portion 3 are formed in pairs with the piping hole 4 interposed therebetween, and when viewed from their respective end faces, a pair of cuts are formed. The notch 7 is formed in a straight line. The arrangement of the notch portion 7 and the orientation of the locking claw 6 are the same on both end faces of the beam reinforcing metal fitting 1a. That is, when the locking claw 6 on one end face side is turned upward, the locking claw 6 on the other end face side can also be turned upward.

When the beam reinforcing metal fitting 1a is fixed to the beam 11, a part of the tip end portion of the main body portion 3 projects from the web 15 on the back surface 15b side of the beam 11. The notch 7 is formed in a protrusion from the web 15. That is, on the back surface 15b side, the notch portion 7 is not hidden by the web 15.

By using the beam reinforcing metal fitting 1a, the beam reinforcing metal fitting 1a is arranged so that the locking claw 6 faces upward on either end surface side, and the net 9 can be hung on the notch portion 7. Therefore, the net 9 is also hung on the notch 7 on the back surface 15b side of the web 15 of the beam 11 shown in FIG. 3A. Therefore, the amount of hook 8 used can be reduced and the work can be shortened.

According to the second embodiment, the same effect as that of the first embodiment can be obtained. Further, by forming the notch portion 7 on the end surface of the main body portion 3 (the end surface on the side where the flange portion 5 is not provided) like the beam reinforcing metal fitting 1a, the beam is reinforced and the back surface 15b side of the web 15 is formed at the same time. Also, the preparation for attaching the net can be completed.

(Third Embodiment)
Next, a third embodiment will be described. 8A and 8B are perspective views showing the beam reinforcing metal fitting 1b according to the third embodiment, FIG. 9A is a front view of the beam reinforcing metal fitting 1b, and FIG. 9B is a side view of the beam reinforcing metal fitting 1b. is there.

A groove-shaped notch 7g is formed in the circumferential direction on the outer peripheral portion of the flange portion 5 of the beam reinforcing metal fitting 1b. That is, a groove having a smaller outer diameter is formed in the substantially central portion of the flange portion 5 in the thickness direction. In the illustrated example, the notch portion 7g is formed over about half the circumference of the beam reinforcing metal fitting 1b in the circumferential direction, but may be formed at the entire circumference or about 1/3 of the circumference. ..

FIG. 10 is a front view showing a beam reinforcing structure 10a using the beam reinforcing metal fitting 1b, and FIG. 11A is a partial cross-sectional view. As shown in the drawing, the beam reinforcing metal fitting 1b is fixed to the beam 11 with the side on which the notch portion 7g is formed facing upward. Although an example in which the welded portion 19 is formed on the flange portion 5 side is shown, the main body portion 3 and the web 15 may be welded, or both of them may be welded. After fixing the beam reinforcing metal fitting 1b to the beam 11, the net 9 can be installed by hanging the net 9 on the notch 7g (groove).

As in the beam reinforcing metal fitting 1c shown in FIG. 11B, a groove-shaped notch 7g is also formed on the end side of the main body 3, and the net 9 is formed on both sides of the web 15 with the notch 7g. You may call it. Also in this case, the notch portion 7g formed in the main body portion 3 is formed in a portion protruding from the web 15 without being hidden by the web 15.

According to the third embodiment, the same effect as that of the first embodiment can be obtained. As described above, by forming the notch portion on which the net 9 can be hung on the at least one end surface of the beam reinforcing metal fitting or the outer peripheral portion on the at least one end side, the installation of the net 9 becomes easy.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention does not depend on the above-described embodiments. 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.

For example, it goes without saying that the embodiments can be combined. Further, in each embodiment, the beam reinforcing metal fitting is composed of the main body portion 3 and the flange portion 5, but the flange portion 5 may not be provided. That is, the beam reinforcing metal fitting may be composed of only the main body 3. In this case, the notch portion is formed on one end surface or the outer peripheral surface of the main body portion 3.

Further, the main body 3 of the beam reinforcing metal fitting is not limited to a cylindrical shape. For example, when the through hole is square, a beam reinforcing metal fitting having a notch formed at the end of the square tubular main body may be used.

1, 1a, 1b, 1c ………… Beam reinforcing metal fittings 3 ………… Main body 4 ………… Piping hole 5 ………… Flange part 6 ………… Locking claws 7, 7a, 7b, 7c, 7d, 7e, 7f, 7g ……… Notch 8 ……… Hook 9 ……… Net 10, 10a ……… Beam reinforcement structure 11 ……… Beam 13 ……… Flange 15 ……… Web 15a ……… Front 15b… …… Back 17 ………… Through hole 19 ………… Welded part

Claims (8)

It is a beam reinforcing metal fitting for reinforcing a beam with a through hole formed in the web.
It is provided with a tubular main body having a piping hole that is inserted into a through hole and through which a pipe is inserted.
A beam reinforcing metal fitting characterized in that a notch portion on which a net can be hung is formed on at least one end surface of the beam reinforcing metal fitting or an outer peripheral portion on the at least one end side. A flange portion that protrudes in the radial direction is provided near the end portion of the main body portion.
The beam reinforcing metal fitting according to claim 1, wherein the notch portion is formed on an end surface of the flange portion or an outer peripheral surface of the flange portion. The notch is opened in one end surface of the beam reinforcing metal fitting and is opened.
1 or claim 1, wherein a part of the internal space of the cutout portion is not visible from the opening when viewed from the end face side, and the edge portion of the opening functions as a locking claw of the net. The beam reinforcing metal fitting according to claim 2. The beam reinforcing metal fitting according to claim 3, wherein the locking claws formed at the edge of the opening of the notch are formed in two opposite directions. The notch portions are formed in pairs on one end surface of the beam reinforcing metal fitting with the piping hole interposed therebetween.
The beam reinforcing metal fitting according to claim 3 or 4, wherein the pair of the notches are formed in a straight line when viewed from the end face. The beam reinforcing metal fitting according to claim 1 or 2, wherein the notch portion is a groove formed in the circumferential direction in the outer peripheral portion of the beam reinforcing metal fitting. A beam reinforcing structure using the beam reinforcing metal fitting according to any one of claims 1 to 6.
The main body is inserted into a through hole formed in the web of the beam and welded to the beam.
A beam reinforcing structure characterized in that a net is hung on the notch. A beam reinforcing method using the beam reinforcing metal fitting according to any one of claims 1 to 6.
The main body is inserted into a through hole formed in the web of the beam and welded to the beam.
A beam reinforcing method characterized by hanging a net on the notch.

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