JP2007138448A - Beam through hole reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beam through hole reinforcing structure in which fittings can exert sufficient reinforcing effects even if the fittings are bolt-connected to a beam. <P>SOLUTION: According to the beam through hole reinforcing structure 1, the beam through hole reinforcing fittings 2, 2a cooperatively pinch a beam through hole 17, and the beam through hole reinforcing fittings 2, 2a are fastened to each other by a high-strength bolt inserted into a bolt insertion hole. Further a tapered portion 5 of the beam through hole reinforcing fitting 2 and a rim 21 of the beam through hole 17 make contact with each other at a predetermined angle over the entire circumference, and a tapered portion 5a of the beam through hole reinforcing fitting 2a and the rim 21 of the beam through hole 17 also make contact with each other at the predetermined angle over the entire circumference. Then by fastening the beam through hole reinforcing fittings 2, 2a together by the high-strength bolt, the beam through hole reinforcing fittings 2, 2a are stuck to the beam 11 without a gap therebetween. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a beam through-hole reinforcing structure.

H-shaped steel, I-shaped steel, etc. are widely used as beams for building structures. In such beams, beam through-holes for passing piping provided inside the building structure are formed. There is.
At that time, in order to prevent a decrease in strength due to the formation of the beam through hole, a reinforcing metal fitting may be attached to the beam through hole.

  There are two methods for attaching the bracket: a method of integrating the bracket and the beam by welding, and a method of integrating the bracket and the beam by friction bonding using fastening means such as bolts. Welding is often used because it can be fixed.

On the other hand, welding has the disadvantage that the metal fittings and beams are deformed by the generated heat and requires skill for attachment, and therefore, bolt joining may be used, and the following are known. (Patent Document 1).
JP 2003-232077 A

However, in the case of conventional bolted joints, it is difficult to completely integrate the beam and metal fitting by friction welding, and there is a gap between the beam through hole and the metal fitting, or between the bolt shaft and the bolt insertion hole peripheral surface. To do.
Therefore, when stress due to a load such as an earthquake acts on the beam, a slip occurs between the bracket and the beam, and the stress cannot be transmitted to the bracket until it is deformed by the gap, so the reinforcement effect of the bracket cannot be exhibited. There is a problem.
Therefore, the frictional force has to be increased by increasing the number of bolts, which increases costs and deteriorates work efficiency.

  This invention is made | formed in view of such a problem, The objective is to provide the beam through-hole reinforcement structure which can exhibit the reinforcement effect of a metal fitting even in the case of bolt joining.

In order to achieve the above-described object, the present invention provides a beam through-hole reinforcing structure provided around a beam through-hole provided in a beam to reinforce the beam through-hole so as to sandwich the beam through-hole. A plurality of metal fittings, and fastening means for fastening the plurality of metal fittings to each other, the metal fitting has a tapered portion, and the tapered portion is provided on substantially the entire circumference of the edge of the beam through hole. It is a beam through-hole reinforcement structure characterized by contacting with a crossing angle.
The fastening means is a bolt, and the metal fitting is provided with a bolt insertion hole through which the bolt is inserted inside the beam through hole.
The maximum outer diameter length of the tapered portion is larger than the diameter length of the beam through hole, and the minimum outer diameter length of the tapered portion is smaller than the diameter length of the beam through hole.
The tapered portion may have a convex portion on the surface.

  According to the present invention, it is possible to provide a beam through-hole reinforcing structure capable of exerting the reinforcement effect of the metal fittings even in the case of bolt joining. Efficiency is improved.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a cross-sectional view showing a beam through-hole reinforcing metal fitting 2 as a metal fitting used in the beam through-hole reinforcing structure 1 according to the present embodiment. FIG. It is a B direction arrow line view of FIG.

As shown in FIGS. 1, 2, and 3, the beam through-hole reinforcing metal fitting 2 has a ring shape, and a taper portion 5 is provided on the outer periphery of the main body 3.
Further, a through hole 7 is provided at a substantially central portion of the beam through hole reinforcing metal fitting 2, and a plurality of bolt insertion holes 9 a, 9 b, 9 c, 9 d are provided between the through hole 7 and the taper portion 5.

Next, the structure of the beam through-hole reinforcing structure 1 using the beam through-hole reinforcing metal fitting 2 will be described. 4 is a plan view showing the beam 11 before the beam through-hole reinforcing structure 1 is provided, and FIG. 5 is a cross-sectional view taken along the line CC in FIG.
6 is a plan view showing the beam 11 provided with the beam through-hole reinforcing structure 1. FIG. 7 is a sectional view taken along the line DD in FIG. 6, and FIG. 8 is an enlarged sectional view taken along the line EE in FIG. is there. FIG. 9 is a view showing a modification of the tapered portion 5.

  As shown in FIGS. 4 and 5, the beam 11 is an H-shaped steel having flanges 15 a and 15 b at both ends of the web 13, and the web 13 is provided with a beam through hole 17.

As shown in FIGS. 6 and 7, the beam through-hole reinforcing structure 1 has a structure in which the beam through-hole reinforcing bracket 2 and the beam through-hole reinforcing bracket 2 a sandwich the beam through-hole 17.
The beam through-hole reinforcing metal fitting 2 and the metal fitting 2a are fastened to each other by high-strength bolts 19a, 19b, 19c, and 19d that are inserted through the bolt insertion holes.
The structure of the beam through-hole reinforcing bracket 2a is the same as that of the beam through-hole reinforcing bracket 2.

As shown in FIG. 7, the bolt insertion holes 11 b and 11 c are provided inside the beam through hole 17.
Therefore, it is not necessary to provide the bolt insertion hole in the beam 11, and the strength of the beam 11 can be prevented from being reduced as compared with the case where the bolt insertion hole is provided.

Moreover, as shown in FIG. 8, the taper part 5 of the beam through-hole reinforcing metal fitting 2 and the edge part 21 of the beam through-hole 17 are in contact with each other with an angle over substantially the entire circumference.
Similarly, the taper portion 5a of the beam through-hole reinforcing metal fitting 2a and the edge portion 21 of the beam through-hole 17 are in contact with each other with an angle over substantially the entire circumference.

  The high-strength bolts 19a, 19b, 19c, and 19d fasten the beam through-hole reinforcing bracket 2 and the beam through-hole reinforcing bracket 2a so that the beam through-hole reinforcing brackets 2 and 2a and the beam 11 can be brought into close contact with each other without any gap. .

  As described above, the tapered portions 5 and 5a and the edge portion 21 are brought into contact with each other at an angle, so that the beam through-hole reinforcing structure 1 and the beam 11 can be brought into close contact with each other even when bolted. Even when stress is applied to the metal, the reinforcing effect of the metal fitting can be exhibited.

  In order to bring the tapered portions 5 and 5a and the edge portion 21 into contact with each other at an angle, as shown in FIG. The minimum outer diameter length 20b of the taper portion 5 needs to be smaller than the diameter length 22 of the beam through hole 17.

  Moreover, as shown in FIG. 8, the filler plate 25a is provided in the clearance gap 23 between the beam through-hole reinforcement metal fitting 2 and the beam through-hole reinforcement metal fitting 2a. This is because the beam through-hole reinforcing metal fitting 2 and the beam through-hole reinforcing metal fitting 2a are kept at a predetermined interval, and the edge portions 21 of the beam through-hole 17 are surely brought into contact with the taper portions 5 and 5a of the beam through-hole reinforcing metal fittings 2 and 2a. It is for pinching.

  The shape of the taper portion 5 is not limited to the taper shape as long as it can contact the edge portion 21 at an angle. For example, the shape of the beam through-hole reinforcing metal fitting 2b shown in FIG. The R portion 5b may be provided.

  Thus, according to the first embodiment, the beam through-hole reinforcing structure 1 has a structure in which the beam through-hole reinforcing brackets 2 and 2a sandwich the beam 11, and the beam through-hole reinforcing brackets 2 and 2a. The taper portions 5 and 5a and the edge portion 21 of the beam through-hole 17 are in contact with each other with an angle over substantially the entire circumference.

  Therefore, the beam through-hole reinforcing structure 1 and the beam 11 can be brought into close contact with each other even when bolted, and the stress applied to the beam 11 can be efficiently transmitted to the beam through-hole reinforcing structure 1.

Next, a second embodiment will be described.
FIG. 10 is a plan view showing a beam through-hole reinforcing bracket 32 as a bracket constituting the beam through-hole reinforcing structure 31 according to the second embodiment, and FIG. 11 is a view in the direction of arrow F in FIG. FIG. 12 is an enlarged cross-sectional view of FIG.
Further, FIG. 13 is an enlarged sectional view showing a state when the beam through-hole reinforcing structure 31 is attached to the beam 11.

The beam through-hole reinforcing structure 31 in the second embodiment includes convex portions 33a, 33b, 33c, 33d, 33e, 33f, 33g, 33h, 33i, and a taper portion of the beam through-hole reinforcing metal fitting 2 in the first embodiment. 33j and 33k are provided.
In addition, the same number is attached | subjected to the element which fulfill | performs the function similar to the beam through-hole reinforcement structure 1 which concerns on 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIGS. 10 and 11, the taper portion 5b of the beam through-hole reinforcing metal fitting 32 is provided with convex portions 33a, 33b, 33c, 33d, 33e, 33f, 33g, 33h, 33i, 33j, 33k, 33l. ing.

  As shown in FIG. 12, the beam through-hole reinforcing structure 31 has a structure in which the beam through-hole reinforcing bracket 32 and the beam through-hole reinforcing bracket 32 a sandwich the beam through-hole 17. The structure of the beam through-hole reinforcing bracket 32 a is the same as that of the beam through-hole reinforcing bracket 32.

  Here, as shown in FIG. 13, the convex portion 33 a of the beam through-hole reinforcing bracket 32 is recessed from the edge 21, and the convex portion 34 a of the beam through-hole reinforcing bracket 32 a is recessed from the edge 21.

  Similar to the first embodiment, the beam through-hole reinforcing structure 31 is not directly joined to the beam 11 with a bolt, but the projecting portion 33a and the projecting portion 34a are formed so that the edge portion 21 is difficult to be inserted. The hole reinforcing structure 31 can prevent the beam through-hole 17 from rotating in the circumferential direction and shifting in another direction.

  Thus, according to the second embodiment, the beam through-hole reinforcing structure 31 has a structure in which the beam through-hole reinforcing brackets 32 and 32a sandwich the beam 11, and the beam through-hole reinforcing brackets 32 and 32a. The taper portions 5b and 5c and the edge portion 21 of the beam through-hole 17 are in contact with each other with an angle over substantially the entire circumference.

  Therefore, the beam through-hole reinforcing structure 31 and the beam 11 can be brought into close contact with each other even when bolted, and the stress applied to the beam 11 can be efficiently transmitted to the beam through-hole reinforcing structure 1a.

  According to the second embodiment, the taper portion 5b of the beam through-hole reinforcing bracket 32 is provided with convex portions 33a, 33b, 33c, 33d, 33e, 33f, 33g, 33h, 33i, 33j, 33k, 33l. Therefore, the beam through-hole reinforcing structure 31 can prevent the beam through-hole 17 from rotating and displaced in other directions.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

Sectional view showing bracket 2 1. A direction arrow view of FIG. B direction arrow view of FIG. Plan view showing beam 11 CC sectional view of FIG. The top view which shows the beam 11 provided with the beam through-hole reinforcement structure 1 DD sectional view of FIG. EE cross-sectional enlarged view of FIG. The figure which shows the modification of the taper part 5. Plan view showing beam through-hole reinforcing bracket 2b F direction arrow view of FIG. Enlarged sectional view of FIG. The expanded sectional view which shows the state at the time of attaching the beam through-hole reinforcement structure 1a to the beam 11

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Beam through-hole reinforcement structure 2 ......... Beam through-hole reinforcement metal fitting 3 ......... Main body 5 ......... Tapered part 7 ......... Through-hole 9a ......... Bolt insertion hole 11 ... ... Beam 13 ... Web 15 ... Flange 17 ... Beam through hole 19a ... High-strength bolt 21 ... Edge 23 ... Gaps 25a ... Filler plate 31 ... Beam through hole reinforcement structure 32 ......... Beam through-hole reinforcing bracket 33a ... Convex

Claims (4)

A beam through-hole reinforcing structure provided around a beam through-hole provided in a beam and reinforcing the beam through-hole,
A plurality of metal fittings provided so as to sandwich the beam through hole;
Fastening means for fastening the plurality of metal fittings to each other;
Consists of
The metal fitting has a tapered portion,
The beam through-hole reinforcing structure, wherein the tapered portion is in contact with an angle over substantially the entire circumference of the edge of the beam through-hole. The fastening means is a bolt;
The beam through-hole reinforcing structure according to claim 1, wherein the metal fitting is provided with a bolt insertion hole through which the bolt is inserted inside the beam through-hole.   The maximum outer diameter length of the taper portion is larger than the diameter length of the beam through hole, and the minimum outer diameter length of the taper portion is smaller than the diameter length of the beam through hole. Beam through-hole reinforcement structure.   The beam through-hole reinforcing structure according to claim 1, wherein the tapered portion has a convex portion on a surface thereof.

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