JP6889691B2 - Steel beam reinforcement metal fittings and steel beam reinforcement structure - Google Patents

Description

The present invention provides a steel beam reinforcing metal fitting for reinforcing a steel beam whose strength is reduced due to a through hole formed by being fixed to the peripheral portion of a through hole formed in a web portion of the steel beam of a building structure. It relates to a steel beam reinforcement structure using this.

In building structures such as S-structures and SRC structures, through holes for passing pipes and wiring may be formed in the web portion of steel beams made of H-shaped steel, I-shaped steel, and the like. Then, in order to prevent the strength of the steel beam from being lowered due to the formation of the through hole in the steel beam, a ring-shaped steel beam reinforcing metal fitting is welded to the peripheral portion of the through hole of the steel beam to reinforce the steel beam. A reinforcing structure was known (see Patent Document 1).

FIG. 6 is a diagram referred to for explaining the conventional steel beam reinforcing metal fitting 4 and the conventional steel beam reinforcing structure 2 using the same.

As shown in FIG. 6, the conventional steel beam reinforcing structure 2 has a steel beam 6 forming a part of a building structure and a web portion 6a formed on the web portion 6a of the steel beam 6 in the thickness direction. It was provided with an annular steel beam reinforcing metal fitting 4 fixed to the peripheral portion of a through hole 6b having a circular cross section.

As shown in FIGS. 6A and 6B, the steel beam reinforcing metal fitting 4 is formed in an annular shape having a central axis substantially the same as the through hole 6b of the steel beam 6, and has an outer diameter on the outer peripheral portion thereof. A cylindrical outer peripheral surface 4a that is substantially the same as the inner diameter of the through hole 6b of the steel beam 6 is formed, and a central hole 4b having a circular cross section that penetrates the steel beam reinforcing metal fitting 4 in the axial direction is formed at the center thereof. It had been.

Further, as shown in FIG. 6B, the steel frame beam reinforcing metal fitting 4 is formed so that the dimension in the thickness direction (left-right direction in the drawing) is larger than the thickness dimension of the web portion 6a of the steel frame beam 6. It had been.

As shown in FIG. 6B, such a steel beam reinforcing metal fitting 4 is fitted so that the outer peripheral surface 4a thereof contacts the inner peripheral surface of the through hole 6b of the steel beam 6 so that the steel beam reinforcing metal fitting 4 is fitted. Both ends in the axial direction (left-right direction in the drawing) were arranged around the through hole 6b of the steel frame beam 6 so as to project outward from both ends of the through hole 6b.

Then, as shown in FIG. 6B, the steel frame beam reinforcing metal fitting 4 has a steel frame beam on one side surface (right side surface in the drawing) of the outer peripheral surface 4a of the steel frame beam reinforcing metal fitting 4 and the web portion 6a of the steel frame beam 6. In the welded portion W1 provided along the peripheral edge of the through hole 6b of 6, the steel beam 6 was integrally fixed by welding over the entire circumference.

FIG. 7 is a diagram referred to for explaining another conventional steel beam reinforcing metal fitting 14, and another conventional steel beam reinforcing structure 12 using the same.

The steel beam reinforcing structure 12 is provided with a steel beam reinforcing metal fitting 14 as shown in FIG. 7 instead of the steel beam reinforcing metal fitting 4 in the steel beam reinforcing structure 2 shown in FIG. The composition is different from.

As shown in FIGS. 7A and 7B, the steel beam reinforcing metal fitting 14 is formed in an annular shape having a central axis substantially the same as the through hole 6b of the steel beam 6, and the outer peripheral portion thereof is formed in an annular shape. As shown in (b), it has a tapered cross-sectional shape such that the outer diameter gradually shrinks toward one end (right end in the figure) in the axial direction (left and right direction in the figure). A cylindrical outer peripheral surface 14a is formed, and the other end (left end in the drawing) of the outer peripheral surface 14a in the axial direction radiates outward in the radial direction perpendicular to the axis of the steel beam reinforcing metal fitting 14. A disc-shaped flange portion 14b that extends was formed.

As shown in FIG. 7B, the inclined outer peripheral surface 14a of the steel beam reinforcing metal fitting 14 has an outer diameter smaller than the inner diameter of the through hole 6b at the portion where the outer diameter is maximum (the left end portion in the drawing). The outer diameter of the flange portion 14b of the steel beam reinforcing metal fitting 14 was formed to be larger than the inner diameter of the through hole 6b.

Then, as shown in FIG. 7B, a central hole 14c having a diameter smaller than the through hole 6b of the steel beam 6 that penetrates the steel beam reinforcing metal fitting 14 in the axial direction is formed in the central portion of the steel beam reinforcing metal fitting 14. It was formed.

As shown in FIG. 7B, the inclined outer peripheral surface 14a of such a steel beam reinforcing metal fitting 14 faces the inner peripheral surface of the through hole 6b of the steel beam 6, and one side surface of the flange portion 14b thereof. (Right side surface in the figure) was arranged around the peripheral portion of the through hole 6b of the steel frame beam 6 so as to contact one side surface (left side surface in the figure) of the web portion 6a.

Then, as shown in FIG. 7B, the steel frame beam reinforcing metal fitting 14 has a through hole of the steel frame beam 6 through the inclined outer peripheral surface 14a of the steel frame beam reinforcing metal fitting 14 and the inner peripheral surface of the through hole 6b of the steel frame beam 6. At the welded portion W2 provided along the inner peripheral surface of 6b, the steel beam 6 was integrally fixed by welding over the entire circumference.

According to the conventional steel beam reinforcing structures 2 and 12 using the conventional steel beam reinforcing metal fittings 4 and 14, even if the through hole 6b is formed in the web portion 6a of the steel beam 6, the through hole 6b Since the web portion 6a of the steel beam 6 is reinforced by fixing the steel beam reinforcing metal fittings 4 and 14 to the peripheral portion, it is possible to prevent the strength of the steel beam 6 from being lowered.

In such conventional steel beam reinforcing structures 2 and 12, depending on the material of the steel beam reinforcing metal fittings 4 and 14 and the shape of the steel beam reinforcing metal fittings 4 and 14, particularly the cross-sectional shape and the size of the cross-sectional area thereof. , The reinforcing strength to be obtained was to be determined.

Japanese Patent No. 4859069

However, in the conventional steel beam reinforcing structures 2 and 12 using the conventional steel beam reinforcing metal fittings 4 and 14 as described above, a plurality of through holes 6b are formed in the web portion 6a of the steel beam 6 of the building structure. In such a case, there is a problem that the sizes of the plurality of through holes 6b cannot be made common.

That is, for example, in the steel beam reinforcing structure 2 as shown in FIG. 6B, when a plurality of through holes 6b are formed in the steel beam 6, the reinforcing strength required for the steel beam 6 is large. The strength is determined not only by the size of the through hole 6b, but also by the position where the hole is formed and the number of holes.

In the steel beam reinforcing structure 2 as shown in FIG. 6B, the inner diameter of the central hole 4b of the steel beam reinforcing metal fitting 4 is determined by the amount and shape of the pipes and wirings inserted therein. In order to obtain a larger reinforcing strength, it is necessary to increase the outer diameter and the thickness dimension of the steel beam reinforcing metal fitting 4, and particularly when the outer diameter of the steel beam reinforcing metal fitting 4 is increased, the steel beam is correspondingly increased. It may be necessary to increase the diameter of the through hole 6b formed in 6.

Further, in the conventional steel frame beam reinforcing structure 12 using the conventional steel frame beam reinforcing metal fitting 14 shown in FIG. 7, the steel frame beam reinforcing metal fitting 14 is fixed to the peripheral portion of the through hole 6b of the steel frame beam 6. There is a problem that the work becomes complicated, the work efficiency is lowered, and the work cost is increased.

That is, in the steel beam reinforcing structure 12 as shown in FIG. 7 (b), when the steel beam reinforcing metal fitting 14 is fixed to the peripheral portion of the through hole 6b of the steel beam 6, first, the steel beam 6 is attached to FIG. 7 (b). ) Is rotated 90 degrees so that the left side faces up, and the steel beam reinforcing metal fitting 14 is placed on the peripheral portion of the through hole 6b so that the central axis of the steel beam reinforcing metal fitting 14 and the central axis of the through hole 6b are aligned. Positioning is performed so that they match exactly, and in this state, the outer peripheral portion of the flange portion 14b of the steel beam reinforcing metal fitting 14 and the side surface of the web portion 6a are welded in several places, and then the steel beam 6 is shown in FIG. 7. Work of lifting the steel beam 6 so that the right side of (b) is on the top, rotating it 180 degrees, turning it over, and welding the outer peripheral surface 14a of the steel beam reinforcing metal fitting 14 and the inner peripheral surface of the through hole 6b of the steel beam 6. Was going.

In this way, in order to fix the steel beam reinforcing metal fitting 14 to the through hole 6b of the steel beam 6, the very heavy steel beam 6 is lifted, rotated 180 degrees, turned inside out, and welded from both sides of the web portion 6. Since it is necessary to perform the work, the work becomes very complicated, and there is a problem that the efficiency of the work is lowered and the cost of the work is increased.

Therefore, in view of the above problems, the present invention can standardize the size of the through hole formed in the steel beam, improve the welding work efficiency, and reduce the work cost. An object of the present invention is to provide a metal fitting and a steel beam reinforcing structure using the metal fitting.

The steel beam reinforcing metal fitting according to the present invention can solve the above problems.
A steel beam reinforcing metal fitting that reinforces the steel beam and has a through hole formed through the web portion of the steel beam in the thickness direction.
The steel beam reinforcing metal fitting includes a main body portion formed in an annular shape having a central axis substantially the same as the through hole of the steel beam.
In the central portion of the main body portion, a central hole having a diameter smaller than that of the through hole is formed so as to penetrate the main body portion in the axial direction.
A contact end surface that is substantially parallel to the side surface of the web portion of the steel frame beam and is in contact with the side surface of the web portion is formed on one end surface of the main body portion in the axial direction.
The outer shape of the contact end face is formed to be larger than the cross-sectional shape of the through hole of the steel beam.
On the contact end surface of the main body portion, a protruding portion protruding in the axial direction from the contact end surface is formed.
The cross-sectional shape of the outer peripheral surface of the protruding portion is formed so as to be substantially the same as the cross-sectional shape of the through hole of the steel frame beam.
In the steel beam reinforcing metal fitting, the outer portion of the contact end surface of the main body portion in the radial direction perpendicular to the axial direction of the main body portion from the protruding portion comes into contact with the side surface of the web portion. In addition, the main body portion is arranged outside the side surface of the web portion of the steel frame beam in the axial direction of the through hole, and
From one side of the web portion in the axial direction of the through hole to the entire circumference along the peripheral portion of the outer peripheral surface of the main body portion of the steel beam reinforcing metal fitting, the side surface of the web portion on one side in the axial direction. It is characterized in that it is configured to be integrally fixed to the steel beam by welding to.

Further, the steel beam reinforcing metal fitting according to the present invention is
The outer peripheral surface of the main body is characterized in that it is formed in a cylindrical shape having a tapered cross-sectional shape in which the outer diameter gradually decreases toward the contact end surface.

Further, the steel beam reinforcing metal fitting according to the present invention is
It is characterized in that a welding reference portion is formed on the outer peripheral surface of the main body portion over the entire circumference on the peripheral portion of the outer peripheral surface.

In addition, the steel beam reinforcement bracket according to the present invention,
Before SL protrusion is characterized in that the formed continuously over the entire circumference along the peripheral edge of the central hole of the main body portion.
Further, the steel beam reinforcing metal fitting according to the present invention is
The protruding portion is characterized in that it is formed intermittently along the peripheral edge portion of the central hole of the main body portion.

Further, the steel beam reinforcing metal fitting according to the present invention is
The axial thickness dimension of the protruding portion is the same as the thickness dimension of the web portion of the steel frame beam, or at least shorter than the thickness dimension of the web portion.

Further, the steel beam reinforcing structure according to the present invention is
A steel beam reinforcing structure using a steel beam reinforcing metal fitting for reinforcing the steel beam, in which a through hole is formed through the web portion of the steel beam in the thickness direction.
The steel beam reinforcing metal fitting includes a main body portion formed in an annular shape having a central axis substantially the same as the through hole of the steel beam.
In the central portion of the main body portion, a central hole having a diameter smaller than that of the through hole is formed so as to penetrate the main body portion in the axial direction.
A contact end surface that is substantially parallel to the side surface of the web portion of the steel frame beam and is in contact with the side surface of the web portion is formed on one end surface of the main body portion in the axial direction.
The outer shape of the contact end face is formed to be larger than the cross-sectional shape of the through hole of the steel beam.
On the contact end surface of the main body portion, a protruding portion protruding in the axial direction from the contact end surface is formed.
The cross-sectional shape of the outer peripheral surface of the protruding portion is formed so as to be substantially the same as the cross-sectional shape of the through hole of the steel frame beam.
In the steel beam reinforcing metal fitting, the outer portion of the contact end surface of the main body portion in the radial direction perpendicular to the axial direction of the main body portion from the protruding portion comes into contact with the side surface of the web portion. The main body portion is arranged outside the side surface of the web portion of the steel frame beam in the axial direction of the through hole so that the protruding portion fits into the through hole of the steel frame beam.
From one side of the web portion in the axial direction of the through hole to the entire circumference along the peripheral portion of the outer peripheral surface of the main body portion of the steel beam reinforcing metal fitting, the side surface of the web portion on one side in the axial direction. It is characterized in that it is integrally fixed to the steel beam by welding to.

Further, the steel beam reinforcement structure according to the present invention,
Before SL protrusion is characterized in that the formed continuously over the entire circumference along the peripheral edge of the central hole of the main body portion.
Further, the steel beam reinforcing structure according to the present invention is
The protruding portion is characterized in that it is formed intermittently along the peripheral edge portion of the central hole of the main body portion.

Further, the steel beam reinforcing structure according to the present invention is
On the same side surface as the side surface of the web portion to which the steel beam reinforcing metal fitting is fixed, in the vicinity of the flange portions formed at the upper and lower ends of the web portion of the steel beam portion, and along the flange portion. It is characterized by having a rod-shaped reinforcing metal fitting fixed to it.

According to such a steel beam reinforcing metal fitting of the present invention,
A steel beam reinforcing metal fitting that reinforces the steel beam and has a through hole formed through the web portion of the steel beam in the thickness direction.
The steel beam reinforcing metal fitting includes a main body portion formed in an annular shape having a central axis substantially the same as the through hole of the steel beam.
In the central portion of the main body portion, a central hole having a diameter smaller than that of the through hole is formed so as to penetrate the main body portion in the axial direction.
A contact end surface that is substantially parallel to the side surface of the web portion of the steel frame beam and is in contact with the side surface of the web portion is formed on one end surface of the main body portion in the axial direction.
The outer shape of the contact end face is formed to be larger than the cross-sectional shape of the through hole of the steel beam.
On the contact end surface of the main body portion, a protruding portion protruding in the axial direction from the contact end surface is formed.
The cross-sectional shape of the outer peripheral surface of the protruding portion is formed so as to be substantially the same as the cross-sectional shape of the through hole of the steel frame beam.
In the steel beam reinforcing metal fitting, the outer portion of the contact end surface of the main body portion in the radial direction perpendicular to the axial direction of the main body portion from the protruding portion comes into contact with the side surface of the web portion. In addition, the main body portion is arranged outside the side surface of the web portion of the steel frame beam in the axial direction of the through hole, and
From one side of the web portion in the axial direction of the through hole to the entire circumference along the peripheral portion of the outer peripheral surface of the main body portion of the steel beam reinforcing metal fitting, the side surface of the web portion on one side in the axial direction. By welding to, it is configured to be integrally fixed with the steel beam.
The size of the through hole formed in the steel beam can be made common, the welding work efficiency can be improved, and the work cost can be reduced.

Further, according to such a steel beam reinforcing structure of the present invention,
A steel beam reinforcing structure using a steel beam reinforcing metal fitting for reinforcing the steel beam, in which a through hole is formed through the web portion of the steel beam in the thickness direction.
The steel beam reinforcing metal fitting includes a main body portion formed in an annular shape having a central axis substantially the same as the through hole of the steel beam.
In the central portion of the main body portion, a central hole having a diameter smaller than that of the through hole is formed so as to penetrate the main body portion in the axial direction.
A contact end surface that is substantially parallel to the side surface of the web portion of the steel frame beam and is in contact with the side surface of the web portion is formed on one end surface of the main body portion in the axial direction.
The outer shape of the contact end face is formed to be larger than the cross-sectional shape of the through hole of the steel beam.
On the contact end surface of the main body portion, a protruding portion protruding in the axial direction from the contact end surface is formed.
The cross-sectional shape of the outer peripheral surface of the protruding portion is formed so as to be substantially the same as the cross-sectional shape of the through hole of the steel frame beam.
In the steel beam reinforcing metal fitting, the outer portion of the contact end surface of the main body portion in the radial direction perpendicular to the axial direction of the main body portion from the protruding portion comes into contact with the side surface of the web portion. The main body portion is arranged outside the side surface of the web portion of the steel frame beam in the axial direction of the through hole so that the protruding portion fits into the through hole of the steel frame beam.
From one side of the web portion in the axial direction of the through hole to the entire circumference along the peripheral portion of the outer peripheral surface of the main body portion of the steel beam reinforcing metal fitting, the side surface of the web portion on one side in the axial direction. By welding to the steel beam, it was fixed integrally with the steel beam.
The size of the through hole formed in the steel beam can be made common, the welding work efficiency can be improved, and the work cost can be reduced.

It is a figure which shows the steel-frame beam reinforcement structure 22 using the steel-frame beam reinforcement metal fitting 24 which concerns on 1st Embodiment of this invention, FIG. 1A is a front view thereof, and FIG. 1B is a figure. 1 (a) is an enlarged cross-sectional view taken along the line AA. It is an enlarged sectional view showing the periphery of the joint part of the steel frame beam 6 and the steel frame beam reinforcing metal fitting 24 of FIG. 1B in an enlarged manner. It is an enlarged sectional view which shows the steel frame beam reinforcement metal fitting 24 provided with the outer peripheral surface 26a of another form of the outer peripheral surface 26a of the main body part 26 of the steel frame beam reinforcement metal fitting 24 shown in FIG. It is a figure which shows the steel beam reinforcement structure 32 which used the steel beam reinforcement metal fitting 34 which concerns on 2nd Embodiment of this invention, FIG. 4A is a sectional view | FIG. It is an enlarged cross-sectional view which shows the periphery of the joint part of the beam 6 and the steel frame beam reinforcing metal fitting 34 in an enlarged manner. It is a figure which shows the steel-frame beam reinforcement structure 42 using the steel-frame beam reinforcement metal fitting 44 which concerns on 3rd Embodiment of this invention, FIG. 5 (a) is an enlarged cross-sectional view taken along the line BB. It is a figure which shows the conventional steel beam reinforcement structure 2 using the conventional steel beam reinforcement metal fitting 4, FIG. 6 (a) is a front view thereof, and FIG. 6 (b) is C- It is a C-line enlarged cross-sectional view. It is a figure which shows the conventional steel beam reinforcement structure 12 using the conventional steel beam reinforcement metal fitting 14, FIG. 7 (a) is a front view thereof, and FIG. 7 (b) is D- It is an enlarged cross-sectional view taken along line D.

Hereinafter, a steel beam reinforcing metal fitting according to the present invention and a mode for carrying out a steel beam reinforcing structure using the same will be specifically described with reference to the drawings.

1 and 2 are views to be referred to for explaining the steel beam reinforcing metal fitting 24 according to the first embodiment of the present invention and the steel beam reinforcing structure 22 using the same. The conventional steel beam reinforcing metal fittings 4 and 14 shown in FIGS. 6 and 7 and the same parts as the conventional steel beam reinforcing structures 2 and 12 using the same are designated by the same reference numerals except for a part. It shall be explained.

As shown in FIG. 1, the steel beam reinforcing structure 22 according to the present embodiment includes a steel beam 6 forming a part of a building structure and a web portion 6a formed on a web portion 6a of the steel beam 6. An annular steel beam reinforcing metal fitting 24 fixed to the peripheral portion of the through hole 6b having a circular cross section in the thickness direction is provided.

As shown in FIG. 1, the steel beam reinforcing metal fitting 24 has a main body 26 formed in an annular shape having a central axis substantially the same as the through hole 6b of the steel beam 6, and one of the main body 26 in the axial direction. It is provided with a protruding portion 28 formed so as to protrude from an end surface (the left end surface in FIG. 1B).

As shown in FIG. 1B, the main body 26 of the steel beam reinforcing metal fitting 24 has a cylindrical outer peripheral surface 26a having an outer diameter larger than the inner diameter of the through hole 6b of the steel beam 6 formed on the outer peripheral portion thereof. A central hole 26b having a circular cross section is formed in the central portion thereof so as to penetrate the main body portion 26 in the axial direction (left-right direction in the drawing), and the inner diameter of the central hole 26b is the inner diameter of the through hole 6b of the steel frame beam 6. It is formed to be smaller.

Then, as shown in FIG. 2, one end surface (left end surface in the figure) of the main body portion 26 of the steel frame beam reinforcing metal fitting 24 in the axial direction (left-right direction in the figure) is a side surface of the web portion 6a of the steel frame beam 6. A contact end face 26c substantially parallel to the above is formed.

As a result, as shown in FIG. 2, the contact end surface 26c of the steel frame beam reinforcing metal fitting 24 is formed so that its outer shape is larger than the cross-sectional shape of the through hole 6b of the steel frame beam 6.

As shown in FIG. 2, the protruding portion 28 of the steel beam reinforcing metal fitting 24 is located in the axial direction from the portion closest to the central axis of the contact end surface 26c of the main body portion 26, that is, the peripheral portion of the central hole 26b of the main body portion 26 (FIG. It is formed so as to protrude to the middle left side).

As shown in FIG. 2, the protruding portion 28 has a cylindrical outer peripheral surface 28a having an outer diameter substantially the same as the inner diameter of the through hole 6b of the steel frame beam 6 formed on the outer peripheral portion thereof, and a main body ring at the central portion thereof. A central hole 28b having substantially the same diameter as the central hole 26b of the portion 26 is formed.

As a result, as shown in FIG. 2, the protruding portion 28 of the steel frame beam reinforcing metal fitting 24 has a cross-sectional shape perpendicular to the axial direction of the outer peripheral surface 28a thereof, which is substantially the same as the cross-sectional shape of the through hole 6b of the steel frame beam 6. It is formed like this.

Then, as shown in FIG. 2, the thickness dimension of the protruding portion 28 of the steel frame beam reinforcing metal fitting 24 in the axial direction (left-right direction in the drawing) is formed to be smaller than the thickness dimension of the web portion 6a of the steel frame beam 6. Has been done.

As shown in FIGS. 1B and 2, the contact end surface 26c of such a steel beam reinforcing metal fitting 24 comes into contact with the side surface of the web portion 6a of the steel beam 6, and the outer peripheral surface 28a of the protruding portion 28 thereof. Is arranged in the peripheral portion of the through hole 6b of the steel frame beam 6 so as to contact and fit the inner peripheral surface of the through hole 6b of the steel frame beam 6.

Then, as shown in FIG. 1B, the steel frame beam reinforcing metal fitting 24 has an outer peripheral surface 26a of the steel frame beam reinforcing metal fitting 24 and one side surface (right side surface in the drawing) of the web portion 6a of the steel frame beam 6. The welded portion W provided along the peripheral portion of 26a is integrally fixed to the steel frame beam 6 by welding over the entire circumference.

According to such a steel beam reinforcing metal fitting 24 and a steel beam reinforcing structure 22 using the same, a plurality of through holes 6b are formed in the web portion 6a of the steel beam 6 of the building structure. Also, the sizes of the plurality of through holes 6b can be made common in advance.

That is, even if a larger reinforcing strength is required depending on the position and number of the through holes 6b formed in the steel beam 6, the outer diameter and thickness of the main body 26 of the steel beam reinforcing metal fitting 24 can be increased. Since it is not necessary to change the inner diameter of the through hole 6b depending on the size and shape of the steel beam reinforcing metal fitting 24, the size of the through hole 6b can be determined in advance and made common.

Further, according to the steel beam reinforcing structure 22 and the steel beam reinforcing metal fitting 24 used therein, the work of fixing the steel beam reinforcing metal fitting 24 to the peripheral portion of the through hole 6b of the steel frame beam 6 is simplified. Therefore, the work efficiency is improved and the work cost can be reduced.

That is, in the steel beam reinforcing structure 22 as shown in FIG. 1 (b), when the steel beam reinforcing metal fitting 24 is fixed to the peripheral portion of the through hole 6b of the steel beam 6, the steel beam 6 is shown in FIG. 1 (b). Rotate it 90 degrees so that the right side is on top, lay it down, place the steel beam reinforcing metal fitting 24 on the peripheral part of the through hole 6b, and in this state, the outer peripheral surface 26a of the main body 26 of the steel beam reinforcing metal fitting 24 and the steel beam. The work of welding the web portion 6a of No. 6 is performed.

At this time, the protruding portion 28 of the steel beam reinforcing metal fitting 24 is fitted into the through hole 6b of the steel beam 6, so that the central axis of the steel beam reinforcing metal fitting 24 and the central axis of the through hole 6b are exactly aligned. Therefore, the steel beam reinforcing metal fitting 24 can be easily positioned.

In this way, in the work of fixing the steel frame beam reinforcing metal fitting 24 to the peripheral portion of the through hole 6b of the steel frame beam 6, it is not necessary to lift the steel frame beam 6 and rotate it 180 degrees to turn it over, and positioning can be easily performed. Therefore, the work is simplified, the work efficiency is improved accordingly, and the work cost can be reduced.

As described above, according to the steel beam reinforcing metal fitting 24 according to the present embodiment and the steel beam reinforcing structure 22 using the same, the size of the through hole formed in the steel beam can be made common, and welding can be performed. It is possible to improve the work efficiency and reduce the work cost.

FIG. 3 shows the outer peripheral surface 26a of the steel beam reinforcing metal fitting 24 of the steel beam reinforcing metal fitting 24 according to the first embodiment and the steel frame beam reinforcing structure 22 using the same. It is a figure which is referred to for explaining 26a.

In FIG. 3A, the outer peripheral surface 26a of the steel beam reinforcing metal fitting 24 is a cylinder having a tapered cross-sectional shape such that the outer diameter gradually decreases toward the contact end surface 26c of the main body 26. It is formed in a shape.

Further, in FIG. 3B, a step portion 26d (welding reference portion) is formed on the outer peripheral surface 26a of the steel frame beam reinforcing metal fitting 24 at a substantially central position in the axial direction (left-right direction in the drawing), and the step portion 26d is formed. The outer diameter of the portion on the 26c side (left side in the drawing) of the contact end surface in the axial direction of the above is formed so as to be slightly smaller. The stepped portion 26d is continuously formed on the peripheral portion of the outer peripheral surface 26a over the entire circumference.

Further, in FIG. 3C, the outer peripheral surface 26a of the main body 26 of the steel frame beam reinforcing metal fitting 24 is substantially at the center position in the axial direction (left-right direction in the figure) from the outer peripheral surface 26a toward the central axis direction. A U-shaped recessed groove portion 26e (welding reference portion) is formed, and the groove portion 26e is formed on the peripheral portion of the outer peripheral surface 26a over the entire circumference.

Since other configurations are the same as those of the steel beam reinforcing metal fitting 24 according to the first embodiment, the steel beam reinforcing structure 22 using the steel beam reinforcing metal fitting 24 on which the outer peripheral surface 26a of such a form is formed is formed. Even so, the size of the through hole formed in the steel beam can be made common, the welding work efficiency can be improved, and the work cost can be reduced.

Further, by using the steel beam reinforcing metal fitting 24 having the outer peripheral surface 26a of such a form, the efficiency of the welding work for fixing the steel beam reinforcing metal fitting 24 to the peripheral portion of the through hole 6b of the steel frame beam 6 can be further improved. Can be done.

That is, in the steel beam reinforcing metal fitting 24 having the outer peripheral surface 26a as shown in FIG. 3A, the side surface and the outer periphery of the web portion 6a of the steel beam 6 are compared with the steel beam reinforcing metal fitting 24 as shown in FIG. Since the angle (groove angle) with the surface 26a is reduced, the amount of welding is reduced accordingly, and the deformation of the welded portion due to heat during welding is also reduced.

Then, in the steel beam reinforcing metal fitting 24 having the outer peripheral surface 26a as shown in FIGS. 3B and 3C, when the steel beam reinforcing metal fitting 24 is welded to the steel frame beam 6, the step portion 26d and the groove portion 26e are formed. The position can be used as a guide for the required welding throat thickness for welding.

FIG. 4 is a diagram referred to for explaining the steel beam reinforcing metal fitting 34 according to the second embodiment of the present invention and the steel beam reinforcing structure 32 using the same.

The steel beam reinforcing structure 32 according to the present embodiment has two steel beam reinforcing metal fittings 34 as shown in FIG. 4 instead of the steel beam reinforcing metal fittings 24 in the steel frame beam reinforcing structure 22 according to the first embodiment. , 34 is provided, which is different from the steel beam reinforcing structure 22 according to the first embodiment.

As shown in FIG. 4B, each of the two steel beam reinforcing metal fittings 34 has a thickness dimension t in the axial direction (left-right direction in the figure) of the protruding portion 38, which is the thickness of the web portion 6a of the steel beam 6. It is formed so as to be smaller than half of the dimension T.

Therefore, as shown in FIGS. 4A and 4B, such steel beam reinforcing metal fittings 34 can be arranged at both ends of the through holes 6b of the steel beam 6, respectively. The protruding portions 38 of the steel frame beam reinforcing metal fittings 34 can be arranged so as to fit into the through holes 6b of the steel frame beam 6 from the left and right end portions without contacting and interfering with each other.

Then, as shown in FIG. 4A, the two steel beam reinforcing metal fittings 34 and 34 have the outer peripheral surface of each steel frame beam reinforcing metal fitting 34 and one side surface of the web portion 6a of the steel frame beam 6 as the main body portion 26. In the welded portion W provided along the outer peripheral surface of the steel frame beam 6, the steel frame beam 6 is integrally fixed by welding over the entire circumference.

Since other configurations are the same as those of the steel beam reinforcing metal fitting 24 according to the first embodiment, even a steel beam reinforcing structure 32 using such a steel beam reinforcing metal fitting 34 is formed on the steel beam. It is possible to standardize the size of the through holes to be formed, improve the welding work efficiency, and reduce the work cost.

Further, according to the steel beam reinforcing metal fitting 34 according to the present embodiment and the steel frame beam reinforcing structure 32 using the same, one steel beam reinforcing metal fitting 34 can be obtained by using two steel beam reinforcing metal fittings 34. Even when the reinforcing strength is insufficient, a larger reinforcing strength can be easily obtained without changing the size and shape of the steel beam reinforcing metal fitting 34.

FIG. 5 is a diagram referred to for explaining the steel beam reinforcing metal fitting 24 according to the third embodiment of the present invention and the steel beam reinforcing structure 42 using the same.

The steel beam reinforcing structure 42 according to the present embodiment has two rod-shaped reinforcing metal fittings 44 as shown in FIG. 5, in addition to the steel beam reinforcing metal fittings 24 in the steel frame beam reinforcing structure 22 according to the first embodiment. The structure is different from that of the steel beam reinforcing structure 22 according to the first embodiment.

As shown in FIG. 5A, the rod-shaped reinforcing metal fitting 44 is a rod-shaped member extending in the left-right direction in the drawing, and the two rod-shaped reinforcing metal fittings 44 are steel beams as shown in FIG. 5B. FIG. 5 is located on the same side surface (right side surface in the drawing) as the side surface of the web portion 6a of the steel frame beam 6 to which the reinforcing metal fitting 24 is welded, at positions at predetermined intervals above and below the through hole 6b of the steel frame beam 6. As shown in (a), the steel beam 6 is arranged so as to be in the vicinity of the flange portions 6c formed at the upper and lower ends of the web portion 6a and to extend in the left-right direction in the drawing along the flange portion 6c. ing.

Then, as shown in FIG. 5B, the rod-shaped reinforcing metal fitting 44 is welded at a welded portion w provided along a side portion in the length direction (perpendicular to the paper surface in the drawing) to form a steel beam. It is fixed integrally with 6.

Other configurations are the same as those of the steel beam reinforcing structure 22 according to the first embodiment, and the through hole formed in the steel beam is also formed by the steel beam reinforcing structure 42 using such a steel beam reinforcing metal fitting 24. It is possible to standardize the size of the beams, improve the work efficiency of welding, and reduce the work cost.

Further, according to the steel beam reinforcing metal fitting 24 according to the present embodiment and the steel beam reinforcing structure 42 using the steel frame beam reinforcing metal fitting 24, even if the reinforcing strength obtained by the steel frame beam reinforcing metal fitting 24 is insufficient. By using the two rod-shaped reinforcing metal fittings 44, it is possible to easily obtain a larger reinforcing strength without changing the size and shape of the steel frame beam reinforcing metal fitting 24.

The present invention is not limited to the first to third embodiments, and various modifications can be made as long as the object of the present invention can be achieved.

For example, in the steel beam reinforcing structures 22, 32, 42 according to the first to third embodiments, the through hole 6b formed in the web portion 6a of the steel beam 6 has a circular cross-sectional shape. However, the cross-sectional shape of the through hole 6b is not limited to a circular shape, and for example, a through hole 6b having a cross-sectional shape other than a circular shape such as a quadrangle or an octagon may be formed.

Further, in the steel beam reinforcing structure 22 according to the first embodiment, the protruding portion 28 of the steel beam reinforcing metal fitting 24 is formed along the peripheral edge of the central hole 26b of the main body 26 over the entire circumference thereof. Although it was formed in a cylindrical shape or an annular shape as described above, the protruding portion 28 of the steel beam reinforcing metal fitting 24 may be formed intermittently along the peripheral edge portion of the central hole 26b. ..

Further, in the steel beam reinforcing structure 22 according to the first embodiment, the end face opposite to the axial contact end face 26c of the steel beam reinforcing metal fitting 24 was formed flat, but the contact end face 26c The opposite end face does not have to be formed flat.

2 Steel beam reinforcement structure 4 Steel beam reinforcement metal fittings 4a Outer peripheral surface 4b Center hole 6 Steel beam 6a Web part 6b Through hole 6c Flange part 12 Steel beam reinforcement structure 14 Steel beam reinforcement metal fittings 14a Outer outer surface 14b Flange part 14c Central hole 22 Reinforcement structure 24 Steel beam reinforcement metal fittings 26 Main body 26a Outer peripheral surface 26b Center hole 26c Contact end surface 26d Stepped part 26e Groove part 28 Protruding part 28a Outer peripheral surface 28b Central hole 32 Steel beam reinforcement structure 34 Steel beam reinforcement metal fittings 38 Protruding part 42 Structure 44 Bar-shaped reinforcing metal fittings W1, W2, W Welded parts

Claims (10)

A steel beam reinforcing metal fitting that reinforces the steel beam and has a through hole formed through the web portion of the steel beam in the thickness direction.
The steel beam reinforcing metal fitting includes a main body portion formed in an annular shape having a central axis substantially the same as the through hole of the steel beam.
In the central portion of the main body portion, a central hole having a diameter smaller than that of the through hole is formed so as to penetrate the main body portion in the axial direction.
A contact end surface that is substantially parallel to the side surface of the web portion of the steel frame beam and is in contact with the side surface of the web portion is formed on one end surface of the main body portion in the axial direction.
The outer shape of the contact end face is formed to be larger than the cross-sectional shape of the through hole of the steel beam.
On the contact end surface of the main body portion, a protruding portion protruding in the axial direction from the contact end surface is formed.
The cross-sectional shape of the outer peripheral surface of the protruding portion is formed so as to be substantially the same as the cross-sectional shape of the through hole of the steel frame beam.
In the steel beam reinforcing metal fitting, the outer portion of the contact end surface of the main body portion in the radial direction perpendicular to the axial direction of the main body portion from the protruding portion comes into contact with the side surface of the web portion. In addition, the main body portion is arranged outside the side surface of the web portion of the steel frame beam in the axial direction of the through hole, and
From one side of the web portion in the axial direction of the through hole to the entire circumference along the peripheral portion of the outer peripheral surface of the main body portion of the steel beam reinforcing metal fitting, the side surface of the web portion on one side in the axial direction. A steel beam reinforcing metal fitting that is configured to be integrally fixed to the steel beam by welding to. The steel beam according to claim 1, wherein the outer peripheral surface of the main body is formed in a cylindrical shape having a tapered cross-sectional shape in which the outer diameter gradually decreases toward the contact end surface. Reinforcing bracket. The steel beam reinforcing metal fitting according to claim 1 or 2, wherein a welding reference portion is formed on the outer peripheral surface of the main body portion over the entire circumference of the peripheral portion of the outer peripheral surface. The steel beam reinforcing metal fitting according to any one of claims 1 to 3, wherein the protruding portion is continuously formed along the peripheral edge portion of the central hole of the main body portion over the entire circumference thereof. The steel beam reinforcing metal fitting according to any one of claims 1 to 3, wherein the protruding portion is formed intermittently along the peripheral edge portion of the central hole of the main body portion. From claim 1, the axial thickness dimension of the protruding portion is the same as the thickness dimension of the web portion of the steel frame beam, or at least shorter than the thickness dimension of the web portion. The steel beam reinforcing metal fitting according to any one of 5. A steel beam reinforcing structure using a steel beam reinforcing metal fitting for reinforcing the steel beam, in which a through hole is formed through the web portion of the steel beam in the thickness direction.
The steel beam reinforcing metal fitting includes a main body portion formed in an annular shape having a central axis substantially the same as the through hole of the steel beam.
In the central portion of the main body portion, a central hole having a diameter smaller than that of the through hole is formed so as to penetrate the main body portion in the axial direction.
A contact end surface that is substantially parallel to the side surface of the web portion of the steel frame beam and is in contact with the side surface of the web portion is formed on one end surface of the main body portion in the axial direction.
The outer shape of the contact end face is formed to be larger than the cross-sectional shape of the through hole of the steel beam.
On the contact end surface of the main body portion, a protruding portion protruding in the axial direction from the contact end surface is formed.
The cross-sectional shape of the outer peripheral surface of the protruding portion is formed so as to be substantially the same as the cross-sectional shape of the through hole of the steel frame beam.
In the steel beam reinforcing metal fitting, the outer portion of the contact end surface of the main body portion in the radial direction perpendicular to the axial direction of the main body portion from the protruding portion comes into contact with the side surface of the web portion. The main body portion is arranged outside the side surface of the web portion of the steel frame beam in the axial direction of the through hole so that the protruding portion fits into the through hole of the steel frame beam.
From one side of the web portion in the axial direction of the through hole to the entire circumference along the peripheral portion of the outer peripheral surface of the main body portion of the steel frame beam reinforcing metal fitting, the side surface of the web portion on one side in the axial direction. A steel beam reinforced structure characterized in that it is integrally fixed to the steel beam by welding to. The steel beam reinforcing structure according to claim 7, wherein the protruding portion is continuously formed along the peripheral edge portion of the central hole of the main body portion over the entire circumference thereof. The steel beam reinforcing structure according to claim 7, wherein the protruding portion is formed intermittently along the peripheral edge portion of the central hole of the main body portion. On the same side surface as the side surface of the web portion to which the steel beam reinforcing metal fitting is fixed, in the vicinity of the flange portions formed at the upper and lower ends of the web portion of the steel beam portion, and along the flange portion. The steel beam reinforcing structure according to any one of claims 7 to 9, wherein a rod-shaped reinforcing metal fitting is fixed to the steel frame beam.

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