JP7272854B2 - Beam reinforcement fitting, beam reinforcement structure and beam reinforcement method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a beam reinforcing metal fixture, a beam reinforcing structure, and a beam reinforcing method for reinforcing a beam having a through-hole, constituting 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).

Also, when constructing a building structure, a fall prevention net is hooked on a hook attached to a pillar or beam to prevent objects or workers from falling during work (for example, Patent Document 2).

JP 2009-167615 A JP-A-2004-232351

However, when reinforcing the beam using conventional beam reinforcement fittings and hooking the fall prevention net described above to the hooks provided on the pillars and beams, it is difficult to attach the hooks to the pillars and beams on site or remove the hooks after using the net. work process increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a beam reinforcing metal fixture, a beam reinforcing structure, and a beam reinforcing method that enable reinforcement of a beam and preparation for attaching a net at the same time.

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, the pipe holes being inserted into the through holes and through which pipes are inserted. The net can be hung only on a part of the circumference of at least one end surface of the beam reinforcing metal fitting or the outer circumference of at least one end side , not the entire circumference. A beam reinforcing fitting characterized in that a possible notch is formed.

A radially projecting flange portion may be provided in the vicinity of an end portion of the main body portion, and the notch portion may be formed in an end surface of the flange portion or an outer peripheral surface of the flange portion.

A second aspect of the invention is a beam reinforcing fitting for reinforcing a beam having through holes formed in a web, comprising a cylindrical main body portion which is inserted into the through holes and has a pipe hole through which a pipe is inserted. At least one end surface of the beam reinforcing metal fitting or an outer peripheral portion of at least one end side of the beam reinforcing metal fitting is formed with a notch portion to which a net can be hung, and the notch portion is formed on one side of the beam reinforcing metal fitting. When viewed from the end face side, a part of the inner space of the notch part is not visible from the opening, and the edge of the opening functions as a locking claw of the net . It is a beam reinforcing metal fitting that

The locking claws formed at the edge of the opening of the notch may be directed in 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 notches may be formed on a straight line when viewed from the end surface.

The notch portion may be a groove formed in the outer peripheral portion of the beam reinforcing metal fitting in the circumferential direction , not in the entire circumference, but only in a portion of the circumferential direction .

According to the first or second aspect of the invention, since the net can be hung on the notch, by welding the beam reinforcing metal fitting to the beam, reinforcement of the beam and preparation for attachment of the net can be performed at the same time. Therefore, it is possible to reduce the installation of separate net hooks and the like.

Further, by providing a radially projecting flange portion in the vicinity of the end portion of the main body portion, the range in which the notch portion can be formed is widened. Further, when the beam reinforcing metal fitting is inserted into the through hole, the flange portion can be used for axial positioning.

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

At this time, by forming the locking claws in two directions, the beam reinforcing metal fittings can be installed in the correct direction.

In addition, by forming a pair of cutouts in a straight line across the pipe hole on one end face of the beam reinforcing metal fitting, the net can be hung at a plurality of locations.

Moreover, 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.

A third invention is a beam reinforcing structure using the beam reinforcing metal fitting according to the first invention, wherein the main body is inserted into a through hole formed in the web of the beam and welded to the beam, thereby The beam reinforcement structure is characterized in that the notch is covered with a net.

According to the third aspect of the invention, since the beam reinforcing metal fitting is formed with a notch for hanging the net, by welding the beam reinforcing metal fitting to the beam, reinforcement of the beam and preparation for attaching the net are completed. and the net can be hung on the notch.

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

According to the fourth aspect of the invention, since the notch is formed in the beam reinforcing metal fitting, by welding the beam reinforcing metal fitting to the beam, the reinforcement of the beam and preparation for attaching the net are completed, and the net is placed in the notch. can be hung, so the work is easy.

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

The perspective view which shows the beam reinforcement metal fitting 1. FIG. (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. 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. (a), (b) is a figure which shows the other form of a notch part. (a) to (d) are diagrams showing still another form of the notch. (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 the beam reinforcing metal fitting 1b, and (b) is a side view showing the 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 use, and (b) is a cross-sectional view of the beam reinforcing metal fitting 1c in use.

(First embodiment)
FIG. 1 is a perspective view showing a beam reinforcing metal fitting 1 according to this embodiment, FIG. 2(a) is a front view, and FIG. 2(b) is a side view. 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 4 through which piping or the like passes. The body portion 3 is a cylindrical portion that is inserted into a through hole of a beam, which will be described later. A flange portion 5 is provided near one end of the body portion 3 . The flange portion 5 is a portion having a larger outer diameter than the body portion 3 and protrudes in the radial direction of 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.

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

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

Moreover, the cutout portion 7 is bent in a substantially L shape in the depth direction (the axial direction of the beam reinforcing metal fitting 1). That is, the notch 7 is opened at one end surface of the beam reinforcing metal fitting 1, and when viewed from the end surface side, a part of the L-shaped bent internal space of the notch 7 is visible from the opening. formed so that there is no By bending the inside of the notch 7 downward from the opening, the edge of the opening can be projected relatively upward, and the part can be used as a net for preventing falling, which will be described later. can be made to function as a locking claw 6 that can be hooked.

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

The beam reinforcing metal fitting 1 is arranged so that the locking claw 6 faces upward. That is, in a side view, the beam reinforcing metal fitting 1 is arranged so that the L-shaped cutout portion 7 is bent downward from the opening side. At this time, when viewed from the end face side of the beam reinforcing metal fitting 1, the pair of notch portions 7 are arranged substantially horizontally on a straight line.

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 .

In the beam reinforcing structure 10, a net 9 for preventing falling is hung on the notch 7 of the beam reinforcing metal fitting 1. - 特許庁Further, the beam 11 is provided with a hook 8 on the back surface 15b side of the web 15, and the hook 8 is also hooked with a net 9 for preventing falling. The net 9 hooked on the notch 7 and the net 9 hooked on the hook 8 are arranged so as to cover the edge of the flange 13 on the lower side of the beam 11, respectively. and prevent workers from falling.

Next, a beam reinforcement method using the beam reinforcement fitting 1 (construction method of the beam reinforcement structure 10) will be described. First, the beam 11 is temporarily placed in the work yard so that the front 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 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 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 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.

After welding the beam reinforcing metal fittings 1 to the beam 11, the beam 11 is installed at the site. That is, the beam 11 is joined to the joint with the column (not shown). Then, a net 9 for preventing falling is hung on the notch 7 (locking claw 6) formed in the beam reinforcing metal fitting 1. As shown in FIG. A net 9 is also hung on hooks 8 attached to the back surface 15b side of the web 15.例文帳に追加The hooks 8 may be pre-attached to the rear surface 15b of the web 15, or may be attached on site.

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

As described above, according to the present embodiment, the notch portion 7 is formed in the end surface of the flange portion 5 of the beam reinforcing metal fitting 1, so that the net 9 for preventing falling can be hung. Therefore, by welding the beam reinforcing metal fittings 1 to the beams 11, the beams 11 can be reinforced and preparations for attaching the net 9 can be completed at the same time. In addition, as soon as the beam 11 is installed at the site, the net 9 can be hung over the notch 7 to prevent the beam from falling.

In addition, since a pair of cutouts 7 are formed on both sides of the pipe hole 4, the net 9 can be hung at two locations. By hanging the net 9 on the notches 7 at a plurality of locations in this way, the weight applied to one notch 7 can be dispersed and the net 9 can be spread out and installed. Moreover, since the pair of cutouts 7 are formed on a straight line, the formation of the cutouts 7 is easy.

In addition, in the present embodiment, the shape of the notch portion 7 when viewed from the side is substantially L-shaped, but it is not limited to this. The shape of the notch 7 is not particularly limited as long as it has a shape that allows the net 9 to be hung thereon.

For example, as shown in FIG. 5(a), the cutout portion 7a may be formed in a straight line without forming a bent portion. In this case, by forming the direction of formation of the notch 7a obliquely with respect to the axial direction of the beam reinforcing metal fitting, when viewed from the end face side, a part of the internal space of the notch 7a is open. The edge of the opening can be made to function as a locking pawl 6 directed upward, which is not visible from the outside.

Moreover, as shown in FIG.5(b), the notch part 7b which has an inclined surface only in one part may be sufficient. Also in this case, by forming a slope in the inner space of the notch 7b with respect to the axial direction of the beam reinforcing metal fitting, a part of the inner space of the notch 7b is open when viewed from the end face side. The edge of the opening can be made to function as a locking pawl 6 directed upward, which is not visible from the outside.

In addition, the beam reinforcing metal fitting 1 using the various notches described above needs to be arranged so that the locking claw 6 faces upward. That is, the beam reinforcing metal fittings 1 described above need to be oriented vertically when installed.

On the other hand, the vertical direction may be eliminated depending on the shape of the notch. The cutouts shown in FIGS. 6A and 6B have a substantially symmetrical shape in the vertical direction, and the opening is narrower than the internal space of the cutout. is formed as For example, the notch 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 direction of the latching claw 6 is formed toward two directions which oppose.

Similarly, a notch 7d shown in FIG. 6B is formed obliquely in two directions in a substantially V shape. A notch portion 7e shown in FIG. 6(c) has a substantially trapezoidal cross section, and slopes are formed on the upper and lower sides. A notch 7f shown in FIG. 6(d) has a substantially circular cross section and an opening smaller than the diameter.

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

(Second embodiment)
Next, a second embodiment will be described. FIG. 7(a) is a rear view of the beam reinforcing metal fitting 1a, and FIG. 7(b) is a side view of the beam reinforcing metal fitting 1a. 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 6, and duplicate descriptions are omitted.

The beam reinforcing metal fitting 1a differs in configuration from the beam reinforcing metal fitting 1 in that the notch portions 7 are formed on both end surfaces of the beam reinforcing metal fitting 1a. That is, the cutout portions 7 are formed in the end surface of the flange portion 5 and the end surface of the main body portion 3, respectively. It should be noted that, instead of the notch 7, another form of notch 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 as a pair with the piping hole 4 interposed therebetween. A notch 7 is formed on a straight line. The arrangement of the notch 7 and the orientation of the locking claw 6 are the same on both end surfaces of the beam reinforcing metal fitting 1a. That is, when the locking claw 6 on one end face side is directed upward, the locking claw 6 on the other end face side can also be directed upward.

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

By using the beam reinforcing metal fittings 1a, the beam reinforcing metal fittings 1a are arranged so that the locking claws 6 face upward on both end faces, and the nets 9 can be hung on the notch portions 7. FIG. Therefore, the net 9 is hung on the notch 7 also on the back surface 15b side of the web 15 of the beam 11 shown in FIG. 3(a). Therefore, the amount of hooks 8 used can be reduced, and the work can be shortened.

According to the second embodiment, effects similar to those of the first embodiment can be obtained. In addition, like the beam reinforcing metal fitting 1a, by forming the notch 7 on the end face of the main body 3 (the end face on the side where the flange portion 5 is not provided), the beam is reinforced and the web 15 on the back surface 15b side is strengthened. You can also complete preparations for installing the net.

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

A groove-like notch portion 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 it may be formed over the entire circumference or about 1/3 of the circumference. .

FIG. 10 is a front view showing a beam reinforcing structure 10a using beam reinforcing metal fittings 1b, and FIG. 11(a) is a partial sectional view. As illustrated, the beam reinforcing metal fitting 1b is fixed to the beam 11 with the side where 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 body portion 3 and the web 15 may be welded together, or both of them may be welded together. 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).

11(b), 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 by the notch 7g. You can put it on. In this case as well, 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. As shown in FIG.

According to the third embodiment, effects similar to those of the first embodiment can be obtained. In this manner, by forming a notch on which the net 9 can be hung on at least one end surface of the beam reinforcing metal fitting or on the outer peripheral portion of at least one end side, the installation of the net 9 is facilitated.

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, it goes without saying that each embodiment 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 be omitted. That is, the beam reinforcing metal fitting may be composed only of the main body portion 3 . In this case, the cutout portion is formed on one side of the main body portion 3, the outer peripheral surface, or the like.

Further, 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 notch formed at the end of a rectangular tubular main body may be used.

Reference numerals 1, 1a, 1b, 1c... Beam reinforcing metal fittings 3... Body part 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 reinforcing structure 11 Beam 13 Flange 15 Web 15a Front 15b …… Back surface 17 …… Through hole 19 …… Welding part

Claims (8)

A beam reinforcing fitting for reinforcing a beam having through holes formed in a web,
A tubular main body having a pipe hole inserted into the through hole and through which a pipe is inserted,
At least one end surface of the beam reinforcing metal fitting or at least one end side outer peripheral portion is formed with a notch portion that can be hung with a net only in a part of the circumferential direction instead of the entire circumference. Beam reinforcement fittings characterized by: A flange portion protruding in a radial direction is provided in the vicinity of the end portion of the main body portion,
2. The beam reinforcing metal fitting according to claim 1, wherein the cutout portion is formed on an end surface of the flange portion or an outer peripheral surface of the flange portion. A beam reinforcing fitting for reinforcing a beam having through holes formed in a web,
A tubular main body having a pipe hole inserted into the through hole and through which a pipe is inserted,
At least one end surface of the beam reinforcing fitting or an outer peripheral portion on at least one end side thereof is formed with a notch portion to which a net can be hung ,
The notch opens to one end face of the beam reinforcing metal fitting,
A beam reinforcing metal fitting according to claim 1, wherein a part of the internal space of the notch is not visible from the opening when viewed from the end face side, and the edge of the opening functions as a locking claw of the net. 4. The beam reinforcing metal fitting according to claim 3, wherein said locking claws formed at the edge of said opening of said notch are oriented in two opposite directions. A pair of the notch portions are formed on one end surface of the beam reinforcing metal fitting with the piping hole interposed therebetween,
5. The beam reinforcing metal fitting according to claim 3, wherein the pair of cutouts are formed on a straight line when viewed from the end face. 3. The notch portion according to claim 1 or 2, wherein the notch portion is a groove formed not on the entire circumference but only on a part of the circumference in the circumferential direction on the outer circumference of the beam reinforcing metal fitting. beam reinforcement fittings. A beam reinforcing structure using the beam reinforcing metal fitting according to any one of claims 1 to 6,
the body portion is inserted into a through hole formed in the web of the beam and welded to the beam;
A beam reinforcement structure, wherein a net is hung over the notch. A beam reinforcing method using the beam reinforcing metal fitting according to any one of claims 1 to 6,
inserting the body portion into a through hole formed in the web of the beam and welding it to the beam;
A beam reinforcing method, characterized in that a net is hung over the notch.

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