JP2009167615A - Beam reinforcing fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beam reinforcing fitting which can stably bring about welding strength necessary for the welding operation of integrating a beam with the beam reinforcing fitting for reinforcing a through-hole portion formed in the beam constituting a building structure, without causing variations in the welding strength. <P>SOLUTION: In this beam reinforcing fitting with a piping hole and a flange, an insertion portion, which is welded to the beam so as to be integrated with the beam, is provided with a welding-range specifying portion which clearly indicates a welding range capable of bringing about the necessary and sufficient welding strength without causing the variations in the welding strength. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a beam reinforcing bracket that is welded to a through hole formed in a beam constituting a building structure and reinforces the beam.

Conventionally, a through hole may be formed in a beam of a building structure in order to pass piping and wiring. In this case, the strength of the beam is reduced by the through hole. In order to prevent the strength of the beam from being lowered, a beam reinforcing bracket is fitted into the through hole, and the outer periphery of the beam reinforcing bracket is welded to the beam to reinforce the beam.

FIG. 7 is a view showing the beam reinforcing metal fitting 60, and FIG. 8 is a view showing a state in which the beam reinforcing metal fitting 60 is attached to the beam 67. The beam reinforcing metal fitting 60 has a piping hole 65 for passing piping inside, and has a flange 61 and a tapered insertion portion 63 on the outer periphery. As shown in FIG. 8A, a hole 69 is provided in the beam 67. As shown in FIG. 8B, the beam reinforcing metal fitting 60 is inserted into the hole 69 provided in the beam 67 until the flange 61 comes into contact with the beam 67.

FIG. 9A is a cross-sectional view showing a state in which the beam reinforcing bracket 60 is attached to the beam 67, and FIG. 9B is an enlarged view of a portion B in FIG. 9A. The outer periphery of the insertion portion 63 of the beam reinforcing bracket 60 and the inner surface of the hole 69 of the beam 67 are fixed by welding, and the beam 67 and the beam reinforcing bracket 60 are integrated. At this time, the welding height of the welded portion 71 is set to be equal to or greater than the thickness of the beam 67 as shown in FIG. This is for grasping that the beam reinforcing bracket 60 and the beam 67 are securely joined.

As a beam reinforcing bracket welded to such a beam, for example, there is a beam reinforcing structure in which the entire circumference on one surface side is welded to a peripheral portion of a through hole provided in the beam (Patent Document 1). Further, there is a beam reinforcing bracket having a flange portion having a diameter larger than that of the through hole and having an outer peripheral portion welded and fixed to a peripheral portion of the through hole formed in the beam (Patent Document 2).
JP 2007-9419 A JP 2003-232105 A

However, the invention described in Patent Document 1 or Patent Document 2 has a problem that the welding strength between the beam and the beam reinforcing bracket is not considered. For this reason, there are many cases where welding that is higher than the welding strength between the beam and the beam reinforcing bracket, which is originally necessary, is performed. That is, originally, the welding strength between the beam and the beam reinforcing bracket does not need to greatly exceed the strength of the beam reinforcing bracket. This is because the beam reinforcing bracket itself is damaged before the welded portion is damaged. In this case, the welding height between the beam reinforcing bracket and the beam is often sufficiently lower than the thickness of the beam.

However, even if the welding height between the beam and the beam reinforcing bracket is defined, it is necessary to perform welding while measuring the welding height over the entire circumference of the beam reinforcing ring, resulting in poor workability and increased cost. Furthermore, there is a problem that the welding range of the welded portion between the beam and the beam reinforcing bracket tends to be excessive or insufficient, and variation in welding strength is likely to occur. On the other hand, if the welding height is increased with safety in mind, a wider range is welded than necessary, and there is a problem that the welding work takes extra time and effort and the welding cost increases. Moreover, when welding time becomes long, there exists a problem that a beam and a beam reinforcement metal fitting may raise | generate a thermal deformation.

The present invention has been made in view of such a problem, and the purpose thereof is to have a welding range specifying part that can easily understand a necessary welding range when welding a beam reinforcing bracket to a beam hole, An object of the present invention is to provide a beam reinforcing metal fitting that can stably and easily obtain necessary and sufficient welding strength.

In order to achieve the above-mentioned object, the first invention is a ring-shaped beam reinforcing bracket provided in a through-hole formed in a beam, and includes a flange portion having an outer diameter larger than the through-hole, and a through-hole. The beam reinforcing bracket is characterized in that it has a small outer diameter and an insertion portion that is inserted into the through hole, and the insertion portion has a welding range specifying portion that indicates a welding range with the through hole. .

The welding range specifying part may be a step provided in the insertion part, or the insertion part has a tapered shape, and the welding range specifying part is a changing part of a taper angle of the insertion part. May be.

  Further, the welding range specifying part may be a surface roughness changing part of the insertion part, or the welding range specifying part may be a color-coded part provided in the insertion part. Moreover, the line provided in the boundary of the said welding range and another site | part may be sufficient as the said welding range specific | specification part.

The welding range may be a minimum welding height for a welding strength between the beam reinforcing bracket and the beam to be larger than a breaking strength of the beam reinforcing bracket.

According to the present invention, since the insertion portion of the beam reinforcing bracket has a welding range specifying portion in which the welding range can be easily understood, excessive welding can be performed when welding the beam reinforcing bracket to the beam through hole. In addition, it is possible to provide a beam reinforcing bracket with no variation in welding strength between the beam reinforcing bracket and the beam without measuring the welding height one by one. As a result, the quality of the welding operation is stabilized, and a necessary and sufficient beam reinforcement strength can be obtained without taking extra effort and time for the welding operation.

Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a diagram showing a beam reinforcing bracket according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a state in which the beam reinforcing bracket of the present invention is used for a beam.

The beam reinforcing metal fitting 1 has a pipe hole 7 penetrating the inside thereof so as to pass the pipe through the beam 11. A flange 3 is provided on one side of the beam reinforcing bracket 1. The flange 3 has a larger outer diameter than the hole 13 provided in the beam 11. A cylindrical insertion portion 5 having an outer diameter smaller than that of the flange 3 is provided on the other surface of the flange 3. The insertion portion 5 has an outer diameter smaller than the diameter of the hole 13 provided in the beam 11. The flange 3 is used for positioning in the axial direction when the beam reinforcing metal fitting 1 is inserted into the hole 13 of the beam 11. On the outer peripheral surface of the insertion portion 5, a step portion 9 is provided as a welding range specifying portion which will be described later. The step portion 9 is provided over the entire outer periphery of the insertion portion 5. Here, the step portion 9 is a step having a different diameter of the insertion portion 5 provided in the insertion portion 5.

In addition, although the insertion part 5 of the beam reinforcement metal fitting 1 has a taper shape in which a diameter becomes small toward the other surface from the flange 3, the insertion part 5 may be a cylindrical shape with a constant outer diameter. Moreover, the material of the beam reinforcement metal fitting 1 should just have intensity | strength more than fixed, for example, steel materials, stainless steel, etc. can be used.

FIG. 2A is a cross-sectional view of a state in which the beam reinforcing bracket 1 is installed on the beam 11. The beam reinforcing bracket 1 is inserted into the hole 13 of the beam 11 until the flange 3 comes into contact with the beam 11. In the beam reinforcing bracket 1, the flange 3 abuts on the beam 11, so that the axial position of the beam reinforcing bracket 1 with respect to the beam 11 is accurately determined. After the position of the beam reinforcing bracket 1 is determined, several points on the outer periphery of the flange 3 are spot welded to the beam 11 from the flange 3 side of the beam reinforcing bracket 1, and the beam reinforcing bracket is temporarily fixed to the beam 11. After that, the beam reinforcing bracket 1 and the beam 11 are integrated by welding the welded portion 15 over the entire circumference of the inserting portion 5 from the inserting portion 5 side of the beam reinforcing bracket 1. The welding is performed by, for example, covered arc welding.

FIG. 2B is an enlarged view of a portion A in FIG. 2A, and shows details of a cross section of the welded portion 15. t indicates the minimum welding height obtained in relation to the beam reinforcing bracket 1, and the range indicated by the minimum welding height t from the surface of the flange 3 is the welding range. The welding range is a welding range in which, when the beam reinforcing bracket 1 is welded and integrated with the beam 11, if this range is welded, a necessary and sufficient welding strength can be obtained. The step portion 9 provided in the insertion portion 5 is a welding range specifying portion that specifies the welding range, and is provided on the outer peripheral portion of the insertion portion 5 that is separated from the surface of the flange 3 by a minimum welding height t. Therefore, the welding operator can obtain a necessary and sufficient welding strength by welding from the surface of the flange 3 until the step 9 which is the welding range specifying portion is hidden over the entire circumference by the welding portion 15 during the welding operation. .

The minimum welding height t is a value unique to the beam reinforcing bracket. That is, the welding height t is the minimum welding height for the welding strength between the beam reinforcing bracket 1 and the beam 11 to be larger than the breaking strength of the beam reinforcing bracket 1. If the sum of the cross-sectional area is a and the diameter of the hole 13 of the beam 11 is d, the minimum welding height t is approximately expressed by the following equation.
t = 2a / d

That is, when a tensile force is applied to the beam reinforcing bracket 1 perpendicular to the paper surface of FIG. 2A, the welding range of the welded portion 15 (the diameter of the hole 13) is larger than the cross-sectional area (2a) of the beam reinforcing bracket 1. If the product of the length d corresponding to (2) and the welding height t (the cross-sectional area of the welding range) is large, the beam reinforcing bracket 1 itself is broken without breaking at the welded portion 15. Therefore, it can be said that the welding range for obtaining a welding strength higher than the strength of the beam reinforcing metal fitting 1 is useless. In calculating the actual weld height, it is desirable to consider the difference between the strength of the welded portion and the strength of the beam reinforcing bracket 1. Further, it is desirable that the actual height t of the stepped portion 9 is slightly larger than t obtained by the above formula, considering the safety of the above formula.

Thus, according to the beam reinforcing bracket 1 according to the present embodiment, the step 9 is provided as a welding range specifying portion for obtaining a required welding strength in consideration of the welding strength required for each beam reinforcing bracket. Therefore, welding is not performed more than necessary, and the welding operation can be performed efficiently. Therefore, welding can be performed inexpensively and easily. In addition, welding may be performed until the stepped portion 9 is hidden, and a necessary welding range can be easily visually recognized. Therefore, it is not necessary to measure the welding height over the entire circumference of the beam reinforcing bracket 1, and Stable welding quality can be obtained because welding variations are less likely to occur.

  Next, the beam reinforcing bracket 20 according to the second embodiment will be described. In the following embodiment, the same number as FIG. 1-2 is attached | subjected to the component which performs the same function as the beam reinforcement metal fitting 1 shown in FIGS. 1-2, and the overlapping description is avoided. FIG. 3 shows an enlarged cross-sectional view of the vicinity of the attachment portion of the beam reinforcing bracket 20 to the beam 11. The beam reinforcing bracket 20 is provided with an angle changing portion 21 as a welding range specifying portion on the outer peripheral portion of the insertion portion 5. The angle changing portion 21 is a portion where the taper angle of the insertion portion 5 is changed (α in the figure). In other words, the taper angle of the beam reinforcing bracket 20 is changed by α at the position t from the flange 3.

According to the beam reinforcing bracket 20 according to the second embodiment, the same effects as those of the first embodiment can be obtained. Since welding may be performed until the angle change part 21 becomes invisible, the welding range can be easily specified.

  Next, the beam reinforcing metal fitting 30 according to the third embodiment will be described. FIG. 4 shows a side view of the beam reinforcing bracket 30. The beam reinforcing bracket 30 has a surface roughness changing portion 31 as a welding range specifying portion on the outer peripheral surface of the insertion portion 5. That is, the surface roughness changing portion 31 is provided at a position t from the surface of the flange 3. The difference in surface roughness can be easily provided by changing the processing speed at the time of cutting the outer peripheral surface of the insertion portion 5 of the beam reinforcing bracket 30, for example. The surface roughness may roughen the welding range, or the surface roughness of the welding range can be reduced.

According to the beam reinforcing bracket 30 according to the third embodiment, the same effects as those of the first embodiment can be obtained. Since welding may be performed until the surface roughness changing portion 31 becomes invisible, the welding range can be easily specified. Further, the surface roughness changing portion 31 can be easily provided by changing the processing speed or the like.

  Next, the beam reinforcing bracket 40 according to the fourth embodiment will be described. FIG. 5 shows a side view of the beam reinforcing bracket 40. The beam reinforcing bracket 40 has a color-coded portion 41 as a welding range specifying portion in the insertion portion 5. That is, the color classification portion 41 is provided at a position t from the surface of the flange 3. The color classification unit 41 can be provided, for example, by coloring only the welding range with paint or the like.

According to the beam reinforcing bracket 40 according to the fourth embodiment, the same effects as those of the first embodiment can be obtained. Since welding may be performed until the color-coded portion 41 becomes invisible, the welding range can be easily specified.

Next, a beam reinforcing bracket 50 according to the fifth embodiment will be described. FIG. 6 shows a side view of the beam reinforcing bracket 50. The beam reinforcing metal fitting 50 is provided with a line 51 as a welding range specifying portion in the insertion portion 5. That is, the line 51 is provided at a position t from the surface of the flange 3. The line 51 may be a marking line, for example, or may be written with a pen or the like.

According to the beam reinforcing bracket 50 according to the fifth embodiment, the same effects as those of the first embodiment can be obtained. Since welding may be performed until the line 51 becomes invisible, the welding range can be easily specified.

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.

For example, the color-coded portion 41 of the beam reinforcing bracket 40, the line 51 of the beam reinforcing bracket 50, and the like can be combined with other embodiments, respectively.

It is a perspective view of the beam reinforcement metal fitting which is the 1st embodiment of the present invention. (A) is sectional drawing of the use condition of the beam reinforcement metal fitting of the 1st Embodiment of this invention, (b) is an enlarged view of the A section of Fig.2 (a). It is a welding section detailed sectional view in the use condition of the beam reinforcement metal fitting of a 2nd embodiment of the present invention. It is a side view of the beam reinforcement metal fitting of the 3rd Embodiment of this invention. It is a side view of the beam reinforcement metal fitting of the 4th Embodiment of this invention. It is a side view of the beam reinforcement metal fitting of the 5th Embodiment of this invention. It is a perspective view of the beam reinforcement metal fitting which is the prior art. Beam reinforcement of the first embodiment (A) is a perspective view of a beam to which a beam reinforcing bracket is attached, and (b) is a perspective view of a state in which the beam reinforcing bracket of FIG. 7 (a) is attached to the beam of (a). (A) is sectional drawing of the use condition of the beam reinforcement metal fitting which is a prior art, (b) is the B section enlarged view of Fig.9 (a).

Explanation of symbols

1 ………… Beam reinforcement bracket 3 ………… Flange 5 ………… Insertion 7 ………… Pipe hole 9 ………… Step 11 ……… Beam 13 ……… Hole 15 ……… Welding Section 20 ......... Beam reinforcement bracket 21 ......... Angle change section 30 ......... Beam reinforcement bracket 31 ... ... Surface roughness variation section 40 ... ... Beam reinforcement bracket 41 ... ... Color-coded section 50 ... ... Beam reinforcement Metal fitting 51 ......... Line 60 ......... Beam reinforcement metal fitting 61 ......... Flange 63 ......... Insertion 65 ...... Pipe hole 67 ......... Beam 69 ......... Hole 71 ......... Welding

Claims (7)

A ring-shaped beam reinforcing bracket provided in a through-hole formed in the beam,
A flange portion having an outer diameter larger than that of the through hole;
An outer diameter smaller than the through hole, and an insertion portion to be inserted into the through hole;
Comprising
The said insertion part has a welding range specific | specification part which shows the welding range with the said through-hole, The beam reinforcement bracket characterized by the above-mentioned. The beam reinforcing bracket according to claim 1, wherein the welding range specifying portion is a step provided in the insertion portion. The insertion portion has a tapered shape,
The beam reinforcing bracket according to claim 1, wherein the welding range specifying portion is a changing portion of a taper angle of the insertion portion.   The beam reinforcing bracket according to claim 1, wherein the welding range specifying portion is a changing portion of the surface roughness of the insertion portion.   The beam reinforcing bracket according to claim 1, wherein the welding range specifying portion is a color-coded portion provided in the insertion portion.   The beam reinforcing bracket according to claim 1, wherein the welding range specifying portion is a line provided at a boundary between the welding range and another portion. The welding range is
The welding strength between the beam reinforcing bracket and the beam is a minimum welding height for making the welding strength greater than the breaking strength of the beam reinforcing bracket. The beam reinforcement bracket described.

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