JP6523729B2 - Ring beam reinforcement bracket, beam reinforcement structure - Google Patents

Description

  The present invention relates to a ring-shaped beam reinforcing fitting or the like which is connected to a beam having a through hole and which constitutes a building structure.

  Conventionally, a through hole may be formed in a beam of a building structure to pass piping and wiring. In this case, the bending resistance of the beam is reduced by the through hole. In order to prevent the decrease in bending strength of the beam, a beam reinforcement fitting is joined to the beam to reinforce the beam.

  As such a beam reinforcement fitting, there is, for example, a ring-shaped member, and there is a beam reinforcement fitting joined to a through hole formed in the beam (for example, Patent Document 1).

JP, 2009-167615, A

  Usually, the reinforcement strength required for the beam in which the through hole is formed varies depending on the portion. For this reason, it is necessary to design a ring-shaped reinforcing metal fitting in accordance with the portion most requiring reinforcement. On the other hand, in view of handleability and cost, it is desirable that the reinforcing member be as light as possible.

  The present invention is made in view of such a problem, and an object of the present invention is to provide a beam reinforcing member etc. which can achieve weight reduction while securing necessary reinforcement strength.

A ring-shaped beam reinforcement fitting fixed to a through hole formed in a beam, the flange portion having an outer diameter larger than the through hole, and the insertion portion having an outer diameter smaller than the through hole and being inserted into the through hole And a thin-walled portion having the thinnest thickness of the ring-shaped beam reinforcing fitting is provided on the center line of the ring-shaped beam reinforcing fitting, from the thin-walled portion toward each direction orthogonal to the center line A ring-shaped beam reinforcement fitting characterized in that the thickness of the ring-shaped beam reinforcement fitting is gradually increased , and at least the thickness of the flange portion of the ring-shaped beam reinforcement fitting is changed .

A thin-walled portion with the thinnest thickness of the ring-shaped beam reinforcing fitting is provided on the center line of the ring-shaped beam reinforcing fitting, and from the thin portion to the respective directions orthogonal to the central line, from the central line The thickness of the ring-shaped beam reinforcing member may be gradually increased in proportion to the distance, and a pair of substantially linear tapered shapes may be formed on the surface of the ring-shaped beam reinforcing member.

  In the ring beam reinforcing fitting, at least the thickness of the insertion portion may be changed.

  The ring beam reinforcement fitting may be divided at the thin portion.

  According to the first aspect of the invention, the thin portion is formed on the central line, and the thickness gradually increases from the thin portion in the direction orthogonal to the central line. For this reason, the thickness is increased only at the portion requiring the most strength, and the thickness at the portion not requiring the strength is thin. As a result, the weight can be reduced as compared with the case of making the whole thick while securing the minimum strength.

  In this case, the thickness of the flange portion may be changed, or the thickness of the insertion portion may be changed.

  Moreover, manufacture is easy by dividing a ring-shaped beam reinforcement metal fitting by a thin part.

  A second invention is a beam reinforcing structure using the ring beam reinforcing fitting according to the first invention, wherein a through hole is formed in a web of the beam, the insertion portion is inserted into the through hole, and the flange A portion abuts the beam, the ring-shaped beam reinforcement is fixed to the periphery or edge of the through hole, the thin-walled portion is disposed on a line substantially parallel to the flange of the beam, and the flange of the beam is It is a beam reinforcing structure characterized in that the thickness of the ring beam reinforcing metal fitting is increased as it approaches.

  A pair of beam reinforcing brackets may be fixed in the vicinity of the flanges of the beams above and below the ring beam reinforcing brackets, respectively.

  According to the second aspect of the invention, it is possible to obtain a beam reinforcing structure having excellent workability as well as securely reinforcing the beam.

  In addition, since the ring-shaped beam reinforcement fitting and the pair of block-shaped beam reinforcement fittings are used in combination, the ring-shaped beam reinforcement fitting can be made smaller as compared with the reinforcement with only the conventional ring-shaped beam reinforcement fittings. .

  ADVANTAGE OF THE INVENTION According to this invention, the beam reinforcement member etc. which can achieve weight reduction can be provided, ensuring a required reinforcement strength.

The perspective view which shows the ring-shaped beam reinforcement metal fitting 1. FIG. (A) is a side view which shows the ring-shaped beam reinforcement metal fitting 1, (b) is a top view which shows the ring-shaped beam reinforcement metal fitting 1. FIG. The front view which shows the beam reinforcement structure 10. FIG. The side view which shows the beam reinforcement structure 10. FIG. The perspective view which shows the ring-shaped beam reinforcement metal fitting 1a. The side view which shows the beam reinforcement structure 10a. The perspective view which shows the ring-shaped beam reinforcement metal fitting 1b. The side view showing beam reinforcement structure 10b. (A) is a front view which shows the ring beam reinforcement metal fitting 1c, (b) is a top view which shows the ring beam reinforcement metal fitting 1c. The upper perspective view which shows the beam reinforcement metal fitting 20. FIG. FIG. 14 is a lower perspective view showing the beam reinforcing fitting 20. (A) is a front view which shows the beam reinforcement metal fitting 20, (b) is a bottom view which shows the beam reinforcement metal fitting 20. FIG. It is sectional drawing of the beam reinforcement metal fitting 20, (a) is the EE sectional view taken on the line of FIG.12 (b), (b) is the FF sectional view taken on the line of FIG.12 (b). It is a perspective view which shows the beam reinforcement structure 10c, (a) is a figure which shows a surface side, (b) is a figure which shows a back surface side. The front view which shows the beam reinforcement structure 10c. FIG. 16 is a cross-sectional view taken along line K-K in FIG. The figure which shows ring-shaped beam reinforcement metal fitting 1d.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 is a perspective view showing a ring-shaped beam reinforcing fitting 1, and FIG. 2 (a) is a view taken in the direction of arrow A in FIG. 1 and a side view of the ring-shaped beam reinforcing fitting 1; FIG. 2 is a view on arrow B of FIG. 1 and is a bottom view of the ring-shaped beam reinforcing fitting 1;

  The ring-shaped beam reinforcement fitting 1 is a ring-shaped member, for example, a member made of a metal such as steel or stainless steel. The ring-shaped beam reinforcement fitting 1 has a piping hole 2 through which piping and the like pass. A flange 3 is provided on one side of the ring-shaped beam reinforcing fitting 1. The flange portion 3 has an outer diameter larger than the through hole provided in the beam. On the other side of the ring-shaped beam reinforcing fitting 1, a cylindrical insertion portion 5 having an outer diameter smaller than that of the flange portion 3 is provided. The insertion portion 5 has an outer diameter smaller than the diameter of the through hole provided in the beam. The flange portion 3 is used for positioning in the axial direction when inserting the ring beam reinforcement fitting 1 into the through hole of the beam.

  The insertion portion 5 has a tapered shape in which the outer diameter decreases toward the tip. Further, the stepped portion 9 is provided on a part of the tapered shape of the insertion portion 5 as necessary. The stepped portion 9 functions as a welding range specifying portion. That is, necessary welding strength can be secured by performing welding to a position where the step 9 is hidden.

  The ring-shaped beam reinforcement fitting 1 is formed with a thin portion 7 having the smallest thickness. The thin portion 7 is formed along a straight line along the center line of the ring-shaped beam reinforcing fitting 1. The thin portion 7 of the ring-shaped beam reinforcing fitting 1 is formed by the thickness change of the flange portion 3. That is, the thickness of the insertion portion 5 is constant over the entire circumference.

  The thickness of the flange portion 3 becomes thicker as it is separated from the thin portion 7. That is, the thickness of the ring-shaped beam reinforcement fitting 1 gradually increases from the thin-walled portion 7 in the respective directions orthogonal to the center line on which the thin-walled portion 7 is formed. Therefore, on the surface of the flange portion 3 (the surface on the side opposite to the insertion portion 5), a pair of tapered shapes are formed such that the thickness gradually increases as the distance from the thin portion 7 increases. In addition, the surface of the contact surface side (insertion part 5 side) with the beam of the flange part 3 becomes a plane.

  FIG. 3 is a front view showing a beam reinforcing structure 10 using the ring beam reinforcing fitting 1, and FIG. 4 is a cross-sectional view of the beam 15 (a side view of the ring beam reinforcing fitting 1). The beam 15 is H steel having flange portions 17 on the upper and lower sides of the web portion 19. In the web portion 19, a through hole 11 for passing a pipe or the like is formed.

  The insertion portion 5 is inserted into the through hole 11 from the back side of the web portion 19 of the ring beam reinforcement fitting 1 and fixed to the periphery or edge of the through hole 11. At this time, the insertion portion 5 of the ring-shaped beam reinforcement fitting 1 is inserted until the flange portion 3 abuts on the web portion 19. When the flange portion 3 abuts on the web portion 19 of the ring beam reinforcement fitting 1, the axial position of the ring beam reinforcement fitting 1 with respect to the web portion 19 can be accurately determined.

  After the position of the ring-shaped beam reinforcement fitting 1 is determined, the outer peripheral portion of the flange portion 3 is spot-welded to the web portion 19 from the flange portion 3 side of the ring-shaped beam reinforcement fitting 1 and the ring-shaped beam reinforcement fitting 1 is formed into a web Temporarily attach to part 19. Thereafter, the ring-shaped beam reinforcing fitting 1 and the web portion 19 are integrated by the welding portion 13 over the entire circumference of the insertion portion 5 from the insertion portion 5 side. Welding is performed by, for example, coated arc welding. At this time, the welding portion 13 is formed to a height at which the step 9 is hidden. The ring-shaped beam reinforcing fitting 1 can improve the bending resistance in the vicinity of the through hole 11.

  In the beam reinforcing structure 10, the ring beam reinforcing fitting 1 is formed so that the forming direction (the center line passing through the thin portion 7) of the thin portion 7 of the ring beam reinforcing fitting 1 becomes a direction substantially parallel to the flange portion 17. Be placed. Therefore, as the ring-shaped beam reinforcing fitting 1 becomes closer to the flange portion 17, the thickness becomes thicker.

  Here, if a portion near the flange portion 17 is reinforced, the effect of improving the bending resistance of the beam is large. For this reason, in the beam reinforcing structure 10, the thickness of the ring-shaped beam reinforcing fitting 1 at a portion requiring reinforcement is large, and the thickness of the ring-shaped beam reinforcing fitting 1 at a portion separated from the flange portion 17 with small reinforcing effect is thin. Therefore, the beams 15 can be efficiently reinforced.

  As described above, according to the present embodiment, the beams 15 having the through holes 11 can be efficiently reinforced. In particular, the thickness of the ring-shaped beam reinforcement fitting 1 at a portion requiring reinforcement can be increased, and a sufficient reinforcement effect can be obtained, and the thickness of the ring-shaped beam reinforcement fitting 1 at a portion far from the flange portion 17 with less reinforcement effect. Weight can be reduced.

  Moreover, since the welding range is specified by the welding range specifying part which is the step part 9, it is possible to suppress the shortage of welding and the cost increase due to excessive welding.

  Next, a second embodiment will be described. FIG. 5 is a perspective view showing a ring-shaped beam reinforcing fitting 1a according to a second embodiment. In addition, in the following description, about the structure similar to the ring-shaped beam reinforcement fitting 1, the code | symbol same as FIGS. 1-4 is attached | subjected, and the overlapping description is abbreviate | omitted.

  The ring beam reinforcement fitting 1a is substantially the same as the ring beam reinforcement fitting 1 except that the thin portion 7 is formed on the insertion portion 5 side. That is, the tapered shape due to the thickness change is formed not on the flange portion 3 side but on the insertion portion 5 side, and the thickness (protrusion margin) of the insertion portion 5 changes depending on the portion.

  FIG. 6 is a cross-sectional view of the beam 15 (a side view of the ring beam reinforcement fitting 1 a) showing a beam reinforcement structure 10 a using the ring beam reinforcement fitting 1 a.

  In the beam reinforcing structure 10a, the ring beam reinforcing fitting 1a is in such a direction that the forming direction (the center line passing through the thin portion 7) of the thin portion 7 of the ring beam reinforcing fitting 1a is a direction substantially parallel to the flange portion 17. Be placed. Therefore, as the ring-shaped beam reinforcement fitting 1 a becomes closer to the flange portion 17, the thickness becomes thicker.

  Also in the beam reinforcing structure 10a, the thickness of the ring-shaped beam reinforcing fitting 1a at a portion requiring reinforcement is large, and the thickness of the ring-shaped beam reinforcing fitting 1a at a portion separated from the flange portion 17 with small reinforcement effect is thin. Therefore, the beams 15 can be efficiently reinforced.

  According to the second embodiment, the same effect as that of the first embodiment can be obtained.

  Next, a third embodiment will be described. FIG. 7 is a perspective view showing a ring-shaped beam reinforcing fitting 1b according to a third embodiment. The ring-shaped beam reinforcement fitting 1 b is substantially the same as the ring-shaped beam reinforcement fitting 1, but a taper associated with a thickness change is formed on both the flange portion 3 and the insertion portion 5.

  In the ring-shaped beam reinforcing fitting 1b, the thin-walled portion 7 in the flange portion 3 and the thin-walled portion 7 in the insertion portion 5 are formed at the same position on the front and back. That is, in the thin-walled portion 7, the thickness of the ring-shaped beam reinforcement fitting 1b is the smallest, and as the distance from the thickness is increased, the thickness of the ring-shaped beam reinforcement fitting 1b gradually increases.

  FIG. 8 is a cross-sectional view of the beam 15 (a side view of the ring-shaped beam reinforcing fitting 1 b) showing a beam reinforcing structure 10 b using the ring-shaped beam reinforcing fitting 1 b.

  In the beam reinforcing structure 10b, the ring beam reinforcing fitting 1b is in such a direction that the forming direction (the center line passing through the thin portion 7) of the thin portion 7 of the ring beam reinforcing fitting 1b is a direction substantially parallel to the flange portion 17. Be placed. Therefore, as the ring-shaped beam reinforcement fitting 1 b becomes closer to the flange portion 17, the thickness becomes thicker.

  Also in the beam reinforcing structure 10b, the thickness of the ring-shaped beam reinforcing fitting 1b in a portion requiring reinforcement is large, and the thickness of the ring-shaped beam reinforcing fitting 1b in a portion separated from the flange portion 17 with small reinforcing effect is thin. Therefore, the beams 15 can be efficiently reinforced.

  According to the third embodiment, the same effect as that of the first embodiment can be obtained.

  Next, a fourth embodiment will be described. Fig.9 (a) is a front view which shows the ring-shaped beam reinforcement fitting 1c concerning 4th Embodiment, FIG.9 (b) is a bottom view which shows the ring-shaped beam reinforcement fitting 1c.

  The ring beam reinforcement fitting 1c is substantially the same as the ring beam reinforcement fitting 1, but is divided into two at a center line passing through the thin portion 7. That is, the ring-shaped beam reinforcement fitting 1c is formed of a pair of semicircular arc-shaped members. When a pair of semicircular members are opposed and butted, it becomes a substantially circular ring-shaped member.

  The ring-shaped beam reinforcement fitting 1 c is welded to the through hole 11 of the beam 15 in a half state. Thereby, the beam 15 can be reinforced.

  Although the ring beam reinforcement fitting 1c is obtained by dividing the ring beam reinforcement fitting 1 into halves, the ring beam reinforcement fittings 1a and 1b may be divided into halves by the thin portion 7.

  According to the fourth embodiment, the same effect as that of the first embodiment can be obtained. Moreover, manufacture is easy by half dividing.

  The fifth embodiment will now be described. FIG. 10 is an upper perspective view showing the beam reinforcing fitting 20, and FIG. 11 is a lower perspective view. 12 (a) is a front view showing the beam reinforcing fitting 20 (view taken in the direction of arrow D in FIG. 12 (b)), and FIG. 12 (b) is a plan view showing the beam reinforcing fitting 20 (FIG. 12 (a) C).

  The beam reinforcing fitting 20 has a welding surface 23, a flange facing surface 25, a contact surface 29, a protrusion 27 and the like. The beam reinforcing fitting 20 is a member made of metal such as steel or stainless steel, for example. The beam reinforcing fitting 20 is not plate-shaped, but has a three-dimensional three-dimensional shape. More specifically, it is desirable that the cross-sectional shape changes from the longitudinal end to the central portion. Details of the cross-sectional shape will be described later.

  The contact surface 29 is a surface that contacts the web portion of the beam. Thus, the contact surface 29 is completely flat.

  The flange portion facing surface 25 is a portion facing the flange portion of the beam, and is formed in a substantially linear shape. A protrusion 27 is formed on the flange facing surface. Although the illustrated example shows the beam reinforcing metal fitting 20 in which the projections 27 are formed at the center in the longitudinal direction and three positions on both sides in total, the position and the number of the projections 27 are not limited to the illustrated example. .

  The protrusions 27 function as marks indicating the direction of the flange facing surface 25. For example, if a mark such as the projection 27 is not formed, there is a possibility that the flange facing surface 25 may be mistaken for the contact surface 29 for contacting the web. In addition, there is a possibility that the flange facing surface 25 may be disposed in the opposite direction to the flange. By providing the protrusions 27, it becomes clear that the protrusions 27 are arranged in the direction of the flange portion, and installation errors can be prevented.

  If the projection 27 is formed at least at the center in the longitudinal direction, the projection 27 at the center can be grasped as the central position of the beam reinforcing fitting 20. Therefore, the installation position of the beam reinforcing fitting 20 in the longitudinal direction can be easily grasped with respect to the through hole.

  In addition, as a mark for grasping | ascertaining the direction of the beam reinforcement metal fitting 20 etc., it is not necessary to be the protrusion 27 necessarily, and as long as the direction can be grasped, it may be other composition (dent, color classification, a scribe etc.).

  The welding surface 23 is a portion to be welded to the web portion of the beam. As shown in FIG. 12 (b), the welding surface 23 partially has a bend. In addition, it may replace with a bending part and may form a curved part, and it is good also as making the whole welding surface 23 into a curved shape.

  In the illustrated example, the beam reinforcing fitting 20 is substantially trapezoidal in a plan view. That is, welding surface 23 is formed on three sides. In the present embodiment, since the welding portion may have three sides, it is not necessary to weld all around as in welding a plate-like member. Further, with respect to the central welding surface 23, the welding surfaces 23 on both sides are not formed vertically but in a gentle tapered shape. For this reason, the change in the welding direction is small, and the welding operation is easy.

  13 (a) is a cross-sectional view taken along the line E-E in FIG. 12 (b) (near the center in the longitudinal direction), and FIG. 13 (b) is a cross-sectional view taken along the line F-F in FIG. Part). As described above, the cross-sectional shape of the beam reinforcing fitting 20 changes in the longitudinal direction. Here, in the following description, the distance between the welding surface 23 of the beam reinforcing fitting 20 and the flange facing surface 25 (the length of the contact surface 29) is referred to as the width of the beam reinforcing fitting 20, and the contact surface 29 is used as the lower surface. At this time, the distance from the contact surface 29 to the upper surface (the length of the flange facing surface 25) is referred to as the height.

  The cross-section (cross-sectional area) of the central portion in the longitudinal direction of the beam reinforcing fitting 20 is larger than the cross-section (cross-sectional area) of both ends. More specifically, the width G of the central portion in the longitudinal direction of the beam reinforcing fitting 20 is larger than the width I of both ends. Further, the height H of the central portion in the longitudinal direction of the beam reinforcing fitting 20 is higher than the height J of the both ends.

  By increasing the cross-sectional area in the vicinity of the central portion of the beam reinforcing fitting 20, when the beam reinforcing fitting 20 is fixed to the beam, it is possible to ensure the strength of the portion that receives the largest stress. Also, at this time, the strength required for the beam reinforcement fitting 20 decreases with distance from the center, and accordingly the weight increase and the cost increase can be suppressed by reducing the cross section toward the end. it can.

  Here, the projections 27 are not formed over the entire height of the flange facing surface 25 but are formed only in part. Specifically, when the side of the boundary between the flange facing surface 25 and the contact surface 29 is defined as the contact surface edge 33, the projection 27 is formed from the upper portion of the flange facing surface 25 to the contact surface edge 33. In addition, a gap is formed between the lower end of the protrusion 27 and the contact surface edge 33.

  In addition, an angle change portion 31 is provided on the upper side of the welding surface 23. The angle change portion 31 is a portion where the angle changes in the cross section between the welding surface 23 and the upper portion thereof. The angle changing unit 31 functions as a welding range specifying unit. That is, necessary welding strength can be secured by welding to a position where the angle change portion 31 is hidden.

  In addition, as a welding range specific | specification part, not the angle change part 31 but another structure, such as color classification, a level | step difference, and a roughness change, may be sufficient.

  When the beam reinforcing fitting 20 is manufactured using a die such as forging, a drafting taper from the die is required, but this drafting taper can also be used as the angle change portion 31. For example, by forming the angle change portion 31 as a joint of molds, the angle change portion 31 can be formed at the boundary between the draft at the lower portion of the welding surface 23 and the reverse taper at the upper portion.

  Fig.14 (a) is a perspective view of the surface side of the beam reinforcement structure 10c, FIG.14 (b) is a perspective view of the surface side of the beam reinforcement structure 10c. FIG. 15 is a front view of the beam reinforcing structure 10c.

  As described above, the ring-shaped beam reinforcement fitting 1 is fixed to the through hole 11. In place of the ring-shaped beam reinforcement fitting 1, ring-shaped beam reinforcement fittings 1a, 1b and 1c may be used.

  The beam reinforcing fitting 20 is disposed at positions away from the through holes 11 and along the upper and lower flange portions 17. The central position of the through hole 11 substantially coincides with the central position in the longitudinal direction of the beam reinforcing fitting 20. Also, the beam reinforcing fitting 20 is longer than the diameter of the through hole 11.

  FIG. 16 is a cross-sectional view taken along line K-K of FIG. The beam reinforcing fitting 20 is disposed on the surface side of the web portion 19 (the side opposite to the flange portion 3 of the ring beam reinforcing fitting 1). Further, the beam reinforcing fitting 20 is disposed in the direction in which the flange portion facing surface 25 of the beam reinforcing fitting 20 faces the flange portion 17. Also, the contact surface 29 contacts the web portion 19 and is fixed to the web portion 19 by the weld 45. At this time, the welding portion 45 is formed to a height at which the angle change portion 31 is hidden.

  Here, a fillet portion 43 is formed at the boundary between the web portion 19 and the flange portion 17 of the beam 15. The fillet portion 43 which is a thickness change portion of the web portion 19 is a concave, substantially arc-shaped portion connecting the web portion 19 and the flange portion 17 gently. In addition, it may replace with the fillet part 43 and a welding bead may be formed, and in this case, it becomes convex convex substantially circular arc shape. In the following description, although the fillet portion 43 is described, the same applies to a welded portion.

  When the beam reinforcing fitting 20 is brought closer to the flange portion 17, the effect of improving the bending strength is greater. Therefore, the beam reinforcing fitting 20 is disposed at a position away from the through hole 11 and in the vicinity of the flange portion 17.

  On the other hand, as described above, the fillet portion 43 is formed in the vicinity of the boundary between the web portion 19 and the flange portion 17. When the beam reinforcing fitting 20 overlaps the fillet portion 43, the contact surface 29 may be separated from the web portion 19 because the beam reinforcing fitting 20 rides on the fillet portion 43. Therefore, the beam reinforcing fitting 20 is installed at a position where it does not ride on the fillet portion 43. That is, the contact surface edge portion 33 is disposed to be closer to the through hole than the fillet portion 43.

  As described above, according to the fifth embodiment, the same effect as that of the first embodiment can be obtained. Further, by reinforcing the periphery of the through hole 11 with the ring-shaped beam reinforcing member 1 and arranging the beam reinforcing member 20 at a position separated from the through hole, the ring-shaped beam reinforcing member 1 can be miniaturized and efficiency The beams 15 can be well reinforced.

  In addition, since the beam reinforcing fitting 20 is formed to have a large cross section in the central portion, it is possible to ensure the necessary strength of the portion and achieve weight reduction. Further, by changing the thickness in this manner, sufficient strength can be secured without increasing the width, so installation can be performed even if the distance between the flange portion 17 and the through hole 11 is narrow. is there.

  In addition, since the projections 27 indicating the direction of the flange facing surface 25 are formed, the installation direction and the installation surface of the beam reinforcing fitting 20 are not mistaken.

  Further, since the welding surface is formed to be bent, the beam reinforcing fitting 20 can be fixed to the web portion 19 by welding the three sides. Therefore, the welding operation is easy.

  Moreover, since the welding range is specified by the welding range specifying part which is the angle change part, it is possible to suppress the shortage of welding and the cost increase due to excessive welding.

  Although the embodiments of the present invention have been described above with reference to the attached drawings, the technical scope of the present invention is not influenced by the above-described embodiments. It is apparent that those skilled in the art can conceive of various changes or modifications within the scope of the technical idea described in the claims, and they are naturally also within the technical scope of the present invention. It is understood that it belongs.

  For example, the beam reinforcing fitting 20 or the like may be disposed on the opposite side of the web portion 19 to the example shown in the embodiment. That is, although the example which attaches ring beam reinforcement metal fittings 1, 1a, 1b, and 1c from the field on the opposite side of web part 19 to beam reinforcement metal fitting 20 was shown, from the same side as beam reinforcement metal fittings 20 grade The ring beam reinforcement fittings 1, 1a, 1b, 1c may be arranged.

  Further, not only the thickness but also the thickness of the cylindrical portion of the insertion portion 5 may be changed as in the ring-shaped beam reinforcing fitting 1 d shown in FIG. That is, although the thickness change of the insertion part 5 mentioned above is a change of the projection height of the insertion part 5, in the example shown to a figure, the wall thickness of the pipe | tube which comprises the insertion part 5 changes. In this case, the wall thickness of the thin-walled portion 7 is the thinnest, and the wall thickness gradually increases away from this. Therefore, the shape of the piping hole 2 becomes a flat shape. Also in this case, the same effect as the ring-shaped beam reinforcing fitting 1 and the like described above can be obtained. In this case, only the change in wall thickness may be made without forming the thin portion 7. That is, a thin portion of the wall thickness may be formed on the center line of the ring-shaped beam reinforcing fitting, and the wall thickness may be gradually increased away from this.

1, 1a, 1b, 1c, 1d ...... Ring beam reinforcing bracket 2 ...... Piping hole 3 ...... Flange portion 5 ...... Insertion portion 7 ...... Thin portion 9 ...... Step 10, 10a , 10b, 10c ...... Beam reinforcing structure 11 ...... Through hole 13 ...... Weld portion 15 ...... Beam 17 ...... Flange portion 19 ...... Web portion 20 ...... Beam reinforcing bracket 23 ...... Welded surface 25: Flange facing surface 27: Projection 29: Contact surface 31: Angle changing portion 33: Contact surface edge 43: Fillet 45: Weld

Claims (6)

A ring beam reinforcement fitting fixed to a through hole formed in a beam, comprising:
A flange portion having an outer diameter larger than the through hole;
An insertion portion smaller in outer diameter than the through hole and inserted into the through hole;
Equipped with
A thin-walled portion with the thinnest thickness of the ring-shaped beam reinforcing fitting is provided on the center line of the ring-shaped beam reinforcing fitting, and the ring-shaped beam gradually extends from the thin portion toward each direction orthogonal to the center line. The thickness of the reinforcing bracket increases ,
The said ring-shaped beam reinforcement fitting is characterized in that at least the thickness of the flange portion changes . A ring beam reinforcement fitting fixed to a through hole formed in a beam, comprising:
A flange portion having an outer diameter larger than the through hole;
An insertion portion smaller in outer diameter than the through hole and inserted into the through hole;
Equipped with
A thin-walled portion with the thinnest thickness of the ring-shaped beam reinforcing fitting is provided on the center line of the ring-shaped beam reinforcing fitting, and from the thin portion to the respective directions orthogonal to the central line, from the central line The thickness of the ring-shaped beam reinforcement fitting gradually increases in proportion to the distance, and a pair of substantially linear tapered shapes are formed on the surface of the ring-shaped beam reinforcement fitting. .   The ring-shaped beam reinforcement fitting according to claim 1 or 2, wherein at least the thickness of the insertion portion of the ring-shaped beam reinforcement fitting is changed.   The ring-shaped beam reinforcement fitting according to any one of claims 1 to 3, wherein the ring-shaped beam reinforcement fitting is divided at the thin portion. A beam reinforcing structure using the ring beam reinforcing metal fitting according to any one of claims 1 to 4,
Through holes are formed in the web of beams,
The insertion portion is inserted into the through hole, the flange portion abuts on the beam, and the ring-shaped beam reinforcement fitting is fixed around or at the edge of the through hole.
The beam reinforcing structure, wherein the thin-walled portion is disposed on a line substantially parallel to a flange of the beam, and the thickness of the ring-shaped beam reinforcement increases as the beam flange is approached.   The beam reinforcing structure according to claim 5, wherein a pair of beam reinforcing brackets are fixed in the vicinity of the flanges of the beams above and below the ring-shaped beam reinforcing brackets.

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