JP7061401B2 - Beam through hole reinforcement bracket - Google Patents

Description

The present invention relates to a beam through hole reinforcing metal fitting attached to a beam having a through hole formed in the web.

As an example of the conventional beam through hole reinforcing metal fitting, the through hole reinforcing member described in Patent Document 1 is known. The through hole reinforcing member is formed in a ring shape having an inner peripheral surface that surrounds the through hole formed in the web of the beam from the periphery thereof, and has an inner diameter (d) defined by the inner peripheral surface and a hole diameter of the through hole. (Dw) satisfies the relationship of d> dw ≧ 0.5d, and is welded to and integrated with the web in order to reinforce the beam portion around the through hole.

Japanese Unexamined Patent Publication No. 2012-12798

Since the through hole reinforcing member is welded to one side of the web, it can be said that the workability is better than that of welding to both sides of the web. However, it is not easy to align the through hole reinforcing member with respect to the through hole. In addition, the position shift of the through hole reinforcing member may occur during welding (joining), and the variation in the welding position (joining position) of the through hole reinforcing member may increase. Further, the peripheral portion of the through hole may be insufficiently reinforced. Therefore, there is a problem that the beam cannot be reinforced stably.

Therefore, an object of the present invention is to provide a beam through-hole reinforcing metal fitting that can improve workability as compared with the conventional case and can stably reinforce a beam having a through hole formed in the web. do.

According to one aspect of the present invention, the beam through hole reinforcing metal fittings attached to a beam having a beam through hole formed in the web by welding are from a ring-shaped main body portion whose both side surfaces are parallel and one side surface of the main body portion. It has a first cylindrical portion that protrudes in a cylindrical shape and has an outer diameter smaller than the outer diameter of the main body portion, and a first cylindrical portion that protrudes cylindrically from the other side surface of the main body portion and has an outer diameter smaller than the outer diameter of the main body portion. A metal fitting through hole having a second cylindrical portion and penetrating the beam through hole reinforcing metal fitting in the width direction by the inner space of the main body portion, the inner space of the first cylindrical portion, and the inner space of the second cylindrical portion. Is formed. Then, in the beam through hole reinforcing metal fitting, the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion are equal to each other, and the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion are equal to each other. Is smaller than the width of the main body.

According to another aspect of the present invention, the beam through hole reinforcing metal fittings attached to a beam having a beam through hole formed in the web by welding have a ring-shaped main body having parallel side surfaces and one side surface of the main body. A first cylindrical portion that protrudes in a cylindrical shape and has an outer diameter smaller than the outer diameter of the main body portion, and a first cylindrical portion that protrudes cylindrically from the other side surface of the main body portion and has an outer diameter smaller than the outer diameter of the main body portion. It has a second cylindrical portion, and has a metal fitting penetrating through the beam through hole reinforcing metal fitting in the width direction by the inner space of the main body portion, the inner space of the first cylindrical portion, and the inner space of the second cylindrical portion. A hole is formed. The beam through hole reinforcing metal fitting has a difference between the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion, and the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion. Is smaller than the width of the main body.

The beam through hole reinforcing metal fitting has the main body portion or the annular protrusion portion in a state where the first cylindrical portion or the second cylindrical portion or the first portion or the second portion is inserted into the beam through hole. It is configured to be welded and fixed to one side of the web. Therefore, the alignment of the beam through hole reinforcing metal fitting with respect to the beam through hole can be easily performed, and the displacement of the beam through hole reinforcing metal fitting during welding is suppressed, so that the welding position of the beam through hole reinforcing metal fitting ( Variations in the fixed position) are also suppressed. Further, since the peripheral edge portion of the beam through hole is covered by the main body portion or the annular protrusion portion, the peripheral edge portion of the beam through hole can be reliably reinforced. Therefore, according to the beam through hole reinforcing metal fitting, the workability thereof is significantly improved as compared with the conventional case, and the beam having the beam through hole formed in the web can be stably reinforced.

Further, in the beam through hole reinforcing metal fitting, the first cylindrical portion or the second cylindrical portion or the first portion or the second portion is selectively inserted into the beam through hole according to the thickness of the web or the like. Therefore, it can be used to reinforce beams with different web thicknesses.

It is sectional drawing of the beam through hole reinforcing metal fitting which concerns on one Embodiment of this invention. It is A view of FIG. It is B view of FIG. It is explanatory drawing of the 1st use mode of the said beam through hole reinforcing metal fitting, FIG. 4 (A) is the sectional view of the beam in 1st use mode, and FIG. 4 (B) is FIG. 4 (A). It is sectional drawing which shows the state in which the beam through hole reinforcing metal fitting is attached to the beam shown by. It is explanatory drawing of the 2nd use mode of the said beam through hole reinforcing metal fitting, FIG. 5 (A) is the sectional view of the beam in the 2nd use mode, and FIG. 5 (B) is FIG. 5 (A). It is sectional drawing which shows the state in which the beam through hole reinforcing metal fitting is attached to the beam shown by. It is explanatory drawing of the 3rd use mode of the said beam through hole reinforcing metal fitting, FIG. 6 (A) is the sectional view of the beam in 3rd use mode, and FIG. 6 (B) is FIG. 6 (A). It is sectional drawing which shows the state in which the beam through hole reinforcing metal fitting is attached to the beam shown by.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
The present invention provides a beam through hole reinforcing metal fitting that is attached to a beam (steel frame beam) made of H-shaped steel or the like having a circular through hole (beam through hole) formed in the web to reinforce the beam. The beam through hole reinforcing metal fitting according to the present invention is mainly formed by using a building structural steel material (for example, SM material, SN material, STKR material).

1 is a cross-sectional view of a beam through hole reinforcing metal fitting 1 according to an embodiment of the present invention, FIG. 2 is a view A of FIG. 1, and FIG. 3 is a view B of FIG. 1. As shown in FIGS. 1 to 3, the beam through-hole reinforcing metal fitting 1 according to the present embodiment is provided with cylindrical portions extending in the width direction of the ring body on both side surfaces of the ring body having a rectangular cross section. It has a different form. That is, the beam through-hole reinforcing metal fitting 1 according to the present embodiment has a ring-shaped main body portion 10 having parallel side surfaces 10a and 10b and a first cylindrical portion 11 protruding cylindrically from one side surface 10a of the main body portion 10. And a second cylindrical portion 12 that protrudes in a cylindrical shape from the other side surface 10b of the main body portion 10 integrally. Although not particularly limited, the beam through-hole reinforcing metal fitting 1 according to the present embodiment can be manufactured by cutting, for example, a steel block.

The width of the main body 10 is W, the outer diameter of the main body 10 is OD0, and the inner diameter of the main body 10 is ID0. That is, the main body portion 10 is formed as a ring body having a width of W and a thickness of (OD0-ID0) / 2.

The first cylindrical portion 11 has an outer diameter OD1 smaller than the outer diameter OD0 of the main body portion 10, and has an inner diameter ID1 equal to the inner diameter ID0 of the main body portion 10. The protruding length L1 of the first cylindrical portion 11 is smaller than the width W of the main body portion 10.

The second cylindrical portion 12 has an outer diameter OD2 smaller than the outer diameter OD0 of the main body portion 10, and has an inner diameter ID2 equal to the inner diameter ID0 of the main body portion 10 (= inner diameter ID1 of the first cylindrical portion 11). The protruding length L2 of the second cylindrical portion 12 is smaller than the protruding length L1 of the first cylindrical portion 11.

Further, the cross-sectional area of the main body 10 (= W × (OD0-ID0) / 2) is the cross-section of the first cylindrical portion 11 (= L1 × (OD1-ID1) / 2) and the disconnection of the second cylindrical portion 12. It is larger than the sum of the area (= L2 × (OD2-ID2) / 2).

Here, in the present embodiment, the outer diameter OD1 of the first cylindrical portion 11 and the outer diameter OD2 of the second cylindrical portion 12 are equal to each other. Further, the inner diameter ID 0 of the main body portion 10, the inner diameter ID 1 of the first cylindrical portion 11 and the inner diameter ID 2 of the second cylindrical portion 12 are equal, and the inner space of the main body portion 10, the inner space of the first cylindrical portion 11 and the second cylindrical portion 12 are equal. One through hole (hereinafter referred to as “metal fitting through hole”) 13 having a constant hole diameter that penetrates the beam through hole reinforcing metal fitting 1 in the width direction is formed by the inner space of the cylinder.

Therefore, it can be said that the beam through-hole reinforcing metal fitting 1 according to the present embodiment is formed as a ring body having a convex (or inverted T-shaped) cross section, in other words. In this case, the annular protrusion portion protruding outward in the radial direction at the intermediate portion in the width direction has a protrusion height of (OD0-OD1) / 2, and both side surfaces of the annular protrusion portion are both side surfaces 10a of the main body portion 10. , 10b, the width of the annular protrusion corresponds to the width W of the main body 10, and the outer peripheral surface of the annular protrusion corresponds to the outer peripheral surface 10c of the main body 10. Further, the first portion located on one side of the annular protrusion and having a diameter smaller than that of the annular protrusion corresponds to the first cylindrical portion 11, and the width of the first portion is the protrusion length of the first cylindrical portion 11. Corresponds to L1. Further, a second portion located on the other side of the annular protrusion and having a diameter smaller than that of the annular protrusion corresponds to the second cylindrical portion 12, and the width of the second portion is the protrusion length of the second cylindrical portion 12. Corresponds to L2.

Next, the usage mode of the beam through hole reinforcing metal fitting 1 according to the present embodiment will be described with reference to FIGS. 4 to 6.

FIG. 4 is an explanatory view of a first usage mode of the beam through hole reinforcing metal fitting 1. FIG. 4A is a cross-sectional view of the steel frame beam 30 in the first usage mode, and FIG. 4B is a cross-sectional view showing a state in which the beam through hole reinforcing metal fitting 1 is attached to the steel frame beam 30. ..

As shown in FIG. 4A, in the first aspect of use, a circular beam through hole 32 is formed in the web 31 of the steel frame beam 30. The thickness T1 of the web 31 is larger than the protruding length L2 of the second cylindrical portion 12 and smaller than the protruding length L1 of the first cylindrical portion 11 (L2 <T1 <L1). Further, the beam through hole 32 has a hole diameter d1 slightly larger than the outer diameter OD1 of the first cylindrical portion 11 (= outer diameter OD2 of the second cylindrical portion 12).

Then, as shown in FIG. 4B, in the first usage mode, the beam through hole reinforcing metal fitting 1 is in a state where the first cylindrical portion 11 is inserted into the beam through hole 32 formed in the web 31. The main body 10 is welded and fixed to one side 31a of the web 31. Specifically, in the beam through hole reinforcing metal fitting 1, the first cylindrical portion 11 is inserted into the beam through hole 32 formed in the web 31, and the one side surface 10a of the main body portion 10 hits one side 31a of the web 31. The outer peripheral surface 10c of the main body 10 is fillet welded to one side 31a of the web 31 over the entire circumference in a state of contact (it is not necessary to be in close contact, it is sufficient that the contact is substantially made). The beam through hole reinforcing metal fitting 1 is attached to the steel frame beam 30. Here, the portion other than the main body portion 10 of the beam through hole reinforcing metal fitting 1, that is, not only the second cylindrical portion 12 but also the first cylindrical portion 11 is not welded to the web 31.

FIG. 5 is a cross-sectional view showing a second usage mode of the beam through hole reinforcing metal fitting 1. FIG. 5A is a cross-sectional view of the steel frame beam 40 in the second usage mode, and FIG. 5B is a cross-sectional view showing a state in which the beam through hole reinforcing metal fitting 1 of the steel frame beam 40 is attached. ..

As shown in FIG. 5A, in the second usage mode, a circular beam through hole 42 is formed in the web 41 of the steel frame beam 40. The thickness T2 of the web 41 is smaller than the protrusion length L2 of the second cylindrical portion 12 (T2 <L1). Further, the beam through hole 42 has a hole diameter d2 slightly larger than the outer diameter OD2 of the second cylindrical portion 12 (= outer diameter OD1 of the first cylindrical portion 11).

Then, as shown in FIG. 5B, in the second usage mode, the beam through hole reinforcing metal fitting 1 is in a state where the second cylindrical portion 12 is inserted into the beam through hole 42 formed in the web 41. The main body 10 is welded and fixed to one side 41a of the web 41. Specifically, in the beam through hole reinforcing metal fitting 1, the second cylindrical portion 12 is inserted into the beam through hole 42 formed in the web 41, and the other side surface 10b of the main body portion 10 hits one side 41a of the web 41. The outer peripheral surface 10c of the main body 10 is fillet welded to one side 41a of the web 41 over the entire circumference in a state of contact (it is not necessary to be in close contact, it is sufficient that the contact is substantially made). The beam through hole reinforcing metal fitting 1 is attached to the steel frame beam 40. Here, as in the case of the first usage mode, the portion of the beam through hole reinforcing metal fitting 1 other than the main body portion 10, that is, not only the first cylindrical portion 11 but also the second cylindrical portion 12 is welded to the web 41. not.

FIG. 6 is a cross-sectional view showing a third usage mode of the beam through hole reinforcing metal fitting 1. FIG. 6A is a cross-sectional view of the steel frame beam 50 in the third usage mode, and FIG. 6B is a cross-sectional view showing a state in which the beam through hole reinforcing metal fitting 1 of the steel frame beam 50 is attached. ..

As shown in FIG. 6A, in the third use mode, a circular beam through hole 52 is formed in the web 51 of the steel frame beam 50. The thickness T3 of the web 51 is larger than the sum of the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 (T3> L1 + L2). Further, the beam through hole 52 has a hole diameter d3 slightly larger than the outer diameter OD1 of the first cylindrical portion 11 (= outer diameter OD2 of the second cylindrical portion 12).

Then, as shown in FIG. 6B, in the third usage mode, the pair of beam through-hole reinforcing metal fittings 1 and 1 are attached to the steel frame beam 50 with the web 51 interposed therebetween. Here, for convenience of explanation, the beam through hole reinforcing metal fitting 1 of one of the pair of beam through hole reinforcing metal fittings 1 and 1 (on the right side of the web 51 in FIG. 6B) is referred to as “first beam through hole reinforcing metal fitting 1”. The beam through hole reinforcing metal fitting 1 of the other of the pair of beam through hole reinforcing metal fittings 1 and 1 (on the left side of the web 51 in FIG. 6B) is referred to as “metal fitting 1A”, and the beam through hole reinforcing metal fitting 1 is referred to as “second beam through hole reinforcing metal fitting 1B”. ".

In the first beam through hole reinforcing metal fitting 1A, the main body 10 is one of the web 51 in a state where the first cylindrical portion 11 is inserted into the beam through hole 52 from one end of the beam through hole 52 formed in the web 51. It is welded and fixed to the surface 51a. Specifically, in the first beam through hole reinforcing metal fitting 1A, the first cylindrical portion 11 is inserted into the beam through hole 52 formed in the web 51, and the one side surface 10a of the main body portion 10 is one of the web 51. The outer peripheral surface 10c of the main body 10 is in contact with the surface 51a (it is not necessary to be in exact contact with the surface 51a), and the outer peripheral surface 10c is cornered with the one surface 51a of the web 51 over the entire circumference. Meat welding is performed, whereby the first beam through hole reinforcing metal fitting 1A is attached to the steel beam 50. Here, as in the case of the first usage mode and the second usage mode, the portion other than the main body portion 10 of the first beam through hole reinforcing metal fitting 1A, that is, the second cylindrical portion 12, is of course the second. 1 The cylindrical portion 11 is also not welded to the web 51.

Further, in the second beam through hole reinforcing metal fitting 1B, the main body 10 is inserted into the beam through hole 52 from the other end of the beam through hole 52 formed in the web 51 by the second cylindrical portion 12. It is fixed by welding to. Specifically, in the second beam through hole reinforcing metal fitting 1B, the second cylindrical portion 12 is inserted into the beam through hole 52 formed in the web 51, and the other side surface 10b of the main body portion 10 is the other side of the web 51. The outer peripheral surface 10c of the main body 10 is in contact with the surface 51b (it is not necessary to be in exact contact with the surface 51b), and the outer peripheral surface 10c of the main body 10 is cornered with the other surface 51b of the web 51 over the entire circumference. Meat welding is performed, whereby the second beam through hole reinforcing metal fitting 1B is attached to the steel beam 50. Here, as in the case of the first usage mode and the second usage mode, the portion other than the main body portion 10 of the second beam through hole reinforcing metal fitting 1B, that is, the first cylindrical portion 11, is of course the first. 2 The cylindrical portion 12 is also not welded to the web 51.

When the thickness T3 of the web 51 of the steel beam 50 is larger than twice the protruding length L1 of the first cylindrical portion 11 (T3> 2 × L1), the second beam through-hole reinforcing metal fitting 1B is the first beam. Similar to the through hole reinforcing metal fitting 1A, the main body portion 10 is welded to the web 51 in a state where the first cylindrical portion 11 is inserted into the beam through hole 52 from the other end of the beam through hole 52 formed in the web 51. Can be fixed. Further, the thickness T3 of the web 51 of the steel beam 50 is larger than twice the protruding length L2 of the second cylindrical portion 12, and the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 When it is smaller than the sum of (2 × L2 <T3 <L1 + L2), the first cylindrical portion 11 of the first beam through hole reinforcing metal fitting 1A is formed on the web 51 in the same manner as the second beam through hole reinforcing metal fitting 1B. The main body 10 can be welded and fixed to the web 51 in a state of being inserted into the beam through hole 52 from the one end of the beam through hole 52.

As described above, the beam through hole reinforcing metal fitting 1 according to the present embodiment has a ring-shaped main body portion 10 in which both side surfaces 10a and 10b are parallel, and a main body portion that protrudes in a cylindrical shape from one side surface 10a of the main body portion 10. A first cylindrical portion 11 having an outer diameter OD1 smaller than the outer diameter OD0 of 10 and a second having an outer diameter OD2 protruding cylindrically from the other side surface 10b of the main body portion 10 and having an outer diameter OD2 smaller than the outer diameter OD0 of the main body portion 10. A metal fitting through hole 13 having a cylindrical portion 12 and penetrating the beam through hole reinforcing metal fitting 1 in the width direction by the inner space of the main body portion 10, the inner space of the first cylindrical portion 11, and the inner space of the second cylindrical portion 12. Is formed. In the beam through hole reinforcing metal fitting 1 according to the present embodiment, the first cylindrical portion 11 or the second cylindrical portion 12 is a circular beam through hole formed in the webs 31, 41, 51 of the steel frame beams 30, 40, 50. The main body 10 is configured to be welded to one side 31a, 41a, 51a, 51b of the webs 31, 41, 51 while being inserted into 32, 42, 52.

In other words, the beam through-hole reinforcing metal fitting 1 according to the present embodiment is formed as a ring body having a convex cross section, and has an annular protrusion protruding outward in the radial direction at an intermediate portion in the width direction. Both sides of the portion are parallel, and the first portion located on one side of the annular protrusion or the second portion located on the other side of the annular protrusion is the web of the steel beam 30, 40, 50. The annular protrusion is welded and solidified to one side 31a, 41a, 51a, 51b of the web 31, 41, 51 while being inserted into the circular beam through holes 32, 42, 52 formed in 31, 41, 51. It is configured as follows.

Therefore, the alignment of the beam through hole reinforcing metal fitting 1 with respect to the beam through hole 32, 42, 52 can be easily performed, and the misalignment of the beam through hole reinforcing metal fitting 1 at the time of welding is suppressed, so that the beam through hole reinforcing metal fitting 1 can be easily aligned. Variations in the welding position (fixed position) of the beam are also suppressed. Further, since the peripheral edges of the beam through holes 32, 42, 52 are covered by the main body portion 10 (the annular protrusion), the peripheral edges of the beam through holes 32, 42, 52 can be reliably reinforced. Therefore, the workability is significantly improved as compared with the conventional case, and the beam having the through hole formed in the web can be stably reinforced.

Further, the first cylindrical portion 11 (the first portion) or the second cylindrical portion 12 (the second portion) selectively fills the beam through holes 32, 42, 52 according to the thickness of the webs 31, 41, 51. Since it can be inserted, it can also be used to reinforce beams of different web thicknesses, which is very convenient.

Further, in the beam through hole reinforcing metal fitting 1 according to the present embodiment, the outer peripheral surface 10c (the outer peripheral surface of the annular protrusion) of the main body 10 covers the entire circumference of the webs 31, 41, 51 on one side 31a, 41a, 51a. , 51b is fillet welded, while the first cylindrical portion 11 (the first portion) and the second cylindrical portion 12 (the second portion) are not welded to the webs 31, 41, 51. Therefore, the welding work may be performed only on one surface side of the webs 31, 41, and 51, and the deterioration of the workability is suppressed (good workability is ensured). In particular, since the pair of beam through-hole reinforcing metal fittings 1 and 1 can be attached across the web 51 as in the third usage mode described above, it is easy to increase the reinforcing cross section (reinforcing amount) with respect to the beam through-hole 52. At the same time, it is possible to reinforce a beam with a large web thickness.

In the above-described embodiment, the protruding length L1 (width of the first portion) of the first cylindrical portion 11 and the protruding length L2 (width of the second portion) of the second cylindrical portion 12 are different. .. However, it is not limited to this. The protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 may be equal to each other. However, it is preferable that the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 are different from each other because it is possible to reinforce more beams having different web thicknesses. It can be said that.

Further, in the above-described embodiment, the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 are smaller than the width W of the main body portion 10. However, it is not limited to this. At least one of the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 may be smaller than the width W of the main body portion 10. For example, the protruding length L1 of the first cylindrical portion 11 may be equal to or larger than the width W of the main body portion 10. Even in this case as well, it is preferable that the cross-sectional area of the main body portion 10 is larger than the sum of the cross-sectional area of the first cylindrical portion 11 and the cross-sectional area of the second cylindrical portion 12.

Here, the sum of the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 may be set to be equal to the width W of the main body portion 10. By doing so, it is possible to manufacture a plurality of variations of the beam through hole reinforcing metal fitting 1 having different protrusion lengths L1 of the first cylindrical portion 11 and L2 of the protrusion length L2 of the second cylindrical portion 12 from the steel block of the same size, which is convenient. be.

Further, in the above-described embodiment, the inner diameter ID0 of the main body portion 10, the inner diameter ID1 of the first cylindrical portion 11 and the inner diameter ID2 of the second cylindrical portion 12 are equal. However, it is not limited to this. In other words, the metal fitting through hole 13 that penetrates the beam through hole reinforcing metal fitting 1 in the width direction does not necessarily have a constant hole diameter. For example, the inner diameter of any one of the inner diameter ID 0 of the main body portion 10, the inner diameter ID 1 of the first cylindrical portion 11 and the inner diameter ID 2 of the second cylindrical portion 12 may be smaller than the other inner diameter.

Furthermore, in the above-described embodiment, the outer diameter OD1 of the first cylindrical portion 11 and the outer diameter OD2 of the second cylindrical portion 12 are equal to each other. However, it is not limited to this. The outer diameter OD1 of the first cylindrical portion 11 and the outer diameter OD2 of the second cylindrical portion 12 may be different. Although not shown, for example, the outer diameter OD2 of the second cylindrical portion 12 may be larger than the outer diameter OD1 of the first cylindrical portion 11. By doing so, the first cylindrical portion 11 or the second cylindrical portion 12 can be selectively inserted into the beam through hole according to the hole diameter of the beam through hole, and thus it is used for reinforcing beams having different hole diameters of the beam through hole. It is also possible and convenient. In this case, the protruding length L1 of the first cylindrical portion 11 and the protruding length L2 of the second cylindrical portion 12 may be equal to or different from each other. Similarly, the inner diameter ID 1 of the first cylindrical portion 11 and the inner diameter ID 2 of the second cylindrical portion 12 may be equal to or different from each other.

Although the embodiments of the present invention and modifications thereof have been described above, the present invention is not limited to the above-described embodiments and modifications, and further modifications and modifications can be made based on the technical idea of the present invention. Is.

1 ... Beam through hole reinforcing metal fittings, 10 ... Main body, 10a, 10b ... Side surfaces of the main body, 11 ... First cylindrical part, 12 ... Second cylindrical part, 13 ... Metal fitting through holes, 30, 40, 50 ... Steel beams , 31, 41, 51 ... Web, 32, 42, 52 ... Beam through hole, ID0 ... Inner diameter of main body, ID1 ... Inner diameter of first cylinder, ID2 ... Inner diameter of second cylinder, L1 ... First cylinder Projection length, L2 ... Projection length of the second cylinder, OD0 ... Outer diameter of the main body, OD1 ... Outer diameter of the first cylinder, OD2 ... Outer diameter of the second cylinder, W ... Width of the main body

Claims (4)

A beam through-hole reinforcement fitting that is attached by welding to a beam with a circular beam through-hole formed on the web.
A ring-shaped body with parallel sides and a ring-shaped body
A first cylindrical portion that protrudes in a cylindrical shape from one side surface of the main body portion and has an outer diameter smaller than the outer diameter of the main body portion.
A second cylindrical portion that protrudes in a cylindrical shape from the other side surface of the main body portion and has an outer diameter smaller than the outer diameter of the main body portion.
Have,
The inner space of the main body portion, the inner space of the first cylindrical portion, and the inner space of the second cylindrical portion form a metal fitting through hole that penetrates the beam through hole reinforcing metal fitting in the width direction.
The protruding length of the first cylindrical portion is equal to the protruding length of the second cylindrical portion, and the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion are smaller than the width of the main body portion.
Beam through hole reinforcement bracket. A beam through-hole reinforcement fitting that is attached by welding to a beam with a circular beam through-hole formed on the web.
A ring-shaped body with parallel sides and a ring-shaped body
A first cylindrical portion that protrudes in a cylindrical shape from one side surface of the main body portion and has an outer diameter smaller than the outer diameter of the main body portion.
A second cylindrical portion that protrudes in a cylindrical shape from the other side surface of the main body portion and has an outer diameter smaller than the outer diameter of the main body portion.
Have,
The inner space of the main body portion, the inner space of the first cylindrical portion, and the inner space of the second cylindrical portion form a metal fitting through hole that penetrates the beam through hole reinforcing metal fitting in the width direction.
The protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion are different, and the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion are smaller than the width of the main body portion.
Beam through hole reinforcement bracket. The beam through hole reinforcing metal fitting according to claim 1 or 2, wherein the sum of the protruding length of the first cylindrical portion and the protruding length of the second cylindrical portion is set to be equal to the width of the main body portion. The beam through hole reinforcing metal fitting according to any one of claims 1 to 3, wherein the cross-sectional area of the main body portion is larger than the sum of the cross-sectional area of the first cylindrical portion and the cross-sectional area of the second cylindrical portion.

Images