JP2003232077A - Beam reinforcing fixture and beam through hole reinforcing structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beam reinforcing fixture which contributes to increased degree of mounting freedom of a pipe in a through hole formed in a beam, and reinforces the through hole so as to have necessary strength while minimizing wastes of materials even if the through hole is different in size. <P>SOLUTION: The beam reinforcing fixture 1 is formed of a ring main body 4 which can be fitted into the through hole 3 formed in the beam 2 and having an inner diameter R, and a flange portion 5 formed on one side of the ring body in an axial direction. Clamping means mounting holes 7 are formed in the flange portion 5 at locations corresponding to the locations of clamping means insertion holes 6 formed in a web portion 2w of the beam 2. Then, the flange portion 5 is abutted on a peripheral portion of the through holes 3, and bolts 9 are inserted into the clamping means insertion holes 6 and the clamping means mounting holes 7, respectively, followed by clamping the bolts by washers 11 and nuts 10, respectively. The beam reinforcing fixture 1 has an axial length A which is larger than the thickness t1 of the web portion 2w of the beam 2, and the ring main body 4 has an inner diameter d2 set to a value equal to 0.8 times the size H of the beam or less. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam reinforcing metal fitting fixed to a through hole formed in a beam constituting various building structures to reinforce the beam and a beam through hole reinforcing structure using the same.

[0002]

2. Description of the Related Art H-section steel and I-section steel are widely used as materials for beams constituting building structures. In such a building structure, one or more through holes may be formed in the web portion of the beam in order to pass the pipes and wirings provided therein. In this case, as means for preventing the strength of the beam from decreasing, there are a reinforcing sleeve member (for example, refer to Patent Document 1) attached to the through hole, a reinforcing plate (for example, refer to Patent Document 2), and the like.

Patent Document 1 describes a beam penetrating sleeve 83 as shown in FIG. The beam penetrating sleeve 83 is formed by integrally molding a sleeve main body 80 and a flange 81 located on the outer peripheral portion of the sleeve main body 80 with a material capable of being welded to the beam 82.
The thickness of the sleeve body 8 is at least on the inner peripheral surface side.
It is formed so as to gradually increase in thickness from both ends of 0 toward the intersection between the sleeve body 80 and the flange 81. With such a configuration, even if the pipe 84 is inserted in an oblique direction, there is an effect that the end of the beam penetration sleeve 83 is not contacted and the pipe 84 is not damaged.

Patent Document 2 describes a through-hole reinforcing structure characterized in that flat plate-shaped opening plates are joined to both sides of a beam web portion in which through holes are formed by high-strength bolting. As a result, it is possible to reinforce the beam through-holes reasonably and economically with a small number of steel frame processing steps.

[0005]

[Patent Document 1] Japanese Patent Publication No. 4-63942 (No. 1-2)
(Page, Fig. 1)

[Patent Document 2] Japanese Utility Model Laid-Open No. 5-57149 (No. 3-4)
(Page, Fig. 1)

[0006]

However, since the beam penetrating sleeve 83 described in Patent Document 1 is a tubular member slightly shorter than the width of the flange portion 85 of the beam 82, it is formed by adjusting the wall thickness. There is also a limit to the amount of change in the inner diameter that can be made, and the insertion angle of the beam penetration sleeve 83 is also limited. Therefore, there is a demand for a reinforcing member having a high degree of freedom in attaching the pipe 84.

Further, the through-hole reinforcing structure described in Patent Document 2 requires two opening plates, so that the number of parts increases, and the two opening plates arranged on both sides of the web portion of the beam. There is a problem that it is difficult to position the bolts when they are fastened with bolts.

On the other hand, as represented by recent intelligent buildings, the facility functions of building structures have become complicated,
Furthermore, it is necessary to consider that the building to be designed will function sufficiently in the future in terms of building plans and building equipment. For this reason, it is desirable that various pipes and wirings inside the building structure are concentrated in a region close to the pillar in the beam-column joint structure, in other words, a region close to the joint end portion of the beam. There is a demand to form it at a position close to the column of the beam joint structure.

However, the end of the beam that is close to the column is called a plasticized region, which is a region that absorbs seismic energy and undergoes a large deformation during a large earthquake. Generally, the installation of through-holes in the plasticized region is avoided because it causes a significant decrease in the strength of the joint structure and there is no reinforcing means that can compensate for it. Therefore, in reality, it is inevitable to form a through hole at a location away from the pillar, that is, a location away from the plasticized region of the beam, which is an inconvenient location from the viewpoint of piping and wiring.

Therefore, the problem to be solved by the present invention is necessary while increasing the degree of freedom in attaching the pipe to the through hole formed in the beam and reducing the waste of material even for the through holes having different sizes. It is an object to provide a beam reinforcing metal fitting that can be reinforced up to the strength and that enables a through hole to be installed in a plasticized region close to a beam-column joint, and a beam through hole reinforcing structure using the beam reinforcing metal fitting.

[0011]

In order to solve the above-mentioned problems, the beam reinforcing metal fitting of the present invention is a substantially ring-shaped beam reinforcing metal fitting fixed to the peripheral portion of a through hole formed in a beam by using fastening means. And a plurality of fastening means insertion holes provided in the peripheral portion of the through hole, which has a ring main body that can be fitted into the through hole, and a flange portion formed on the outer periphery of one side of the ring main body in the axial direction. A fastening means mounting hole having an arrangement corresponding to is provided in the flange portion, and the axial length of the ring body is set to 0.5 times to 10.0 times the wall thickness in the radial direction.

The stress generated in the peripheral portion of the through hole when an external force is applied to the beam becomes gradually smaller as it goes away from the web portion of the beam along the central axis of the through hole. To be a waste of. Therefore, the shape of the beam reinforcing metal fitting is substantially ring-shaped, and the axial length of the ring main body is 0.5 to 10.0 times (more preferably 0.5 to 5.0) the radial wall thickness. By restricting it to double, it is possible to reinforce the necessary strength even for through-holes of different sizes and to reinforce it to the required strength. Also, even if the pipe is inserted diagonally into the through-hole, Since it does not come into contact with the reinforcing metal member, the degree of freedom in mounting is increased.

In this case, the reason why the axial length of the ring body is 0.5 to 10.0 times the radial thickness is 0.
If it is less than 5 times, the strength becomes insufficient, and 1
This is because if it is greater than 0.0 times, the strength does not increase despite the increase in the length in the axial direction, and the material waste increases.

It is desirable that the fastening means mounting holes are provided at 4 to 16 places. If there are less than four fastening means mounting holes, the load applied to one fastening means may become too large and the fastening means may break earlier than the beam reinforcing metal fittings. Since the work may be increased and the work may be delayed, 4 to 16 locations are preferable, whereby stress concentration of each fastening means can be avoided and the fastening work can be performed quickly.

The volume of the beam reinforcing metal fitting is 1.0 of the volume of the space formed inside the through hole formed in the beam.
It is also possible to set the time to 3.0 times. Here, the volume of the space portion can be obtained by multiplying the opening area of the through hole by the thickness of the web portion of the beam.

The reason why the volume of the beam-reinforcing member is 1.0 to 3.0 times the volume of the space is that when the beam-reinforcing metal is less than 1.0 times, the beam having no through hole (hereinafter referred to as "no This is because the strength is smaller than that of the “hole beam”), and if it is more than 3.0 times, the strength is higher than that of the non-hole portion of the beam, resulting in excessive quality and too heavy weight. With such a configuration, the through holes having different sizes are reinforced with a predetermined strength.

It is also possible to gradually reduce the diameter of the outer peripheral portion of the ring main body toward the surface side without the flange portion. With this configuration, the work of fitting the ring body into the through hole can be facilitated and the work time can be shortened.

On the other hand, the length from the minimum outer diameter portion of the outer peripheral portion of the ring body to the outer periphery of the flange portion is set to be half or less of the minimum outer diameter of the outer peripheral portion, and the axial length of the flange portion is the axial direction of the ring body. It is desirable that the length is half or less. When the beam reinforcing metal fitting having such a structure is fixed to the through hole of the beam by using a fastening means, it exerts an excellent reinforcing effect and has a strength equivalent to that of a beam having no through hole, that is, a so-called non-hole beam. Since it is obtained, it is possible to install the through hole in the plasticized region near the beam-column joint.

Further, the inner diameter of the ring body is set to 0.
It is desirable to be 8 times or less. Beam formation refers to the dimension of the beam in the direction of gravity, for example, in the case of a beam made of H-shaped steel, the dimension from the surface of one flange portion to the surface of the other flange portion.

In the case of the conventional beam through-hole sleeve, the inner diameter of the through hole that can be formed in the beam is about 0.5 times the beam forming upper limit. Therefore, when there are many pipes and wirings, a plurality of through holes are provided. Although it was necessary, by setting the inner diameter of the ring body to 0.8 times or less of the beam formation, the size of the holes for piping and wiring can be up to 0.8 times that of the beam formation without causing a decrease in the strength of the beam. Since the size can be increased, it is not necessary to provide a plurality of through holes, and the number of steps can be reduced. In addition,
If the inner diameter of the ring main body exceeds 0.8 times the beam formation, the beam reinforcing function deteriorates, so 0.8 times or less is preferable.

It is also possible to provide three or more positioning protrusions on the outer peripheral portion that directly contact the inner edge of the through hole.
With such a configuration, it is possible to absorb an error in the shapes of the ring main body and the through hole of the beam reinforcing metal fitting, so that the center alignment work can be facilitated.

On the surface of the flange portion facing the beam,
It is also possible to provide a dowel pinching surface for pinching the dowel with the beam. The dowel is a member having a plurality of protrusions, and since it has an action of increasing the frictional force between the flange and the beam by sandwiching it between the flange and the beam, it resists the shearing force applied to the fastening means. Demonstrate the enhancing function.

Next, in the beam through-hole reinforcing structure of the present invention, one of the above-mentioned beam reinforcing metal fittings is fixed to the peripheral portion of the through hole formed in the beam forming the beam-column joint structure by using fastening means. It is characterized in that the distance from the joint position of the column and the beam to the axis of the beam reinforcing metal fitting is not more than twice the beam formation of the beam. With this structure, the through holes formed in the beam for passing various pipes and wirings inside the building structure can be arranged at a position close to the column of the beam-column joint structure. Therefore, it is possible to consolidate piping and wiring, which is convenient in designing a building, and the workability of wiring and piping is also greatly improved.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. (First Embodiment) FIG. 1A is a side sectional view showing a usage state of a beam reinforcing metal fitting according to a first embodiment of the present invention.
FIG. 3B is a side sectional view showing a through hole of a beam to which the beam reinforcing metal fitting is attached, FIG. 2 is a partial front view showing a usage state of the beam reinforcing metal fitting, and FIG. It is a perspective view showing a state.

As shown in FIGS. 1 and 2, the beam reinforcing metal fitting 1 is a member having a substantially ring shape as a whole, and has a circular shape having an inner diameter R formed on the beam 2 made of, for example, H-shaped steel. The ring main body 4 of the beam reinforcing metal fitting 1 is fitted into the through hole 3, and the flange portion 5 provided on one side of the outer circumference of the ring main body 4 in the axial direction.
Are fixed to the peripheral portion of the through hole 3 by using a bolt 9, a washer 11 and a nut 10 which are fastening means.

Around the through hole 3 of the beam 2, fastening means insertion holes 6 are formed at a total of 6 positions at intervals of 60 degrees. Also,
The flange portion 5 of the beam reinforcing metal fitting 1 is formed with fastening means attachment holes 7 as an example of fastening means attachment portions in an arrangement corresponding to the arrangement of the fastening means insertion holes 6. A bolt 9 is inserted into the fastening means insertion hole 6 and the fastening means mounting hole 7 in a communicating state, and is fastened and fixed by a washer 11 and a nut 10. Since the flange portion 5 is provided,
Axial positioning can be reliably performed without installation tools.

The outer peripheral portion of the ring body 4 has a taper shape in which the diameter is gradually reduced toward the surface side where the flange portion 5 is absent. Positioning protrusions 8 that directly contact the inner edge 3a of the through hole 3 of the beam 2 are evenly arranged at three locations on the outer peripheral portion 4a of the ring body 4 at 120-degree intervals. By providing such a positioning protrusion 8, even if there is a geometrical error between the inner edge portion 3a of the through hole 3 and the outer peripheral portion of the ring body 4 of the beam reinforcing metal fitting 1, alignment can be performed easily and accurately. You can As a result, the mounting accuracy can be improved, the quality can be improved, and the working time can be shortened.

Maximum outer diameter d of the ring body 4 of the beam reinforcing metal fitting 1
1 is a size that can be fitted into a circular space portion 16 having an inner diameter R formed inside the through hole 3, and the axial length A of the ring body 4 is formed to be thicker than the thickness t1 of the web portion 2w. ing. Further, the inner diameter d2 of the ring body 4 has a size capable of inserting the pipe 15 inside thereof and is 0.8 times or less of the beam formation H which is the size of the beam 2 in the gravity direction.

The volume V1 of the space 16 which is the missing portion of the web portion 2w of the beam 2 can be obtained by V1 = R ² × π × t1 × 1/4, and the approximate volume V2 of the beam reinforcing metal fitting 1 is , V2 = (d1 ² −d2 ² ) × π × A × 1/4. Strictly speaking, the volume V2 of the beam reinforcing metal fitting 1 should include the flange portion 5 and the positioning projection portion 8, but since the volume ratio of these portions is small with respect to the whole, in the present embodiment, The approximate value calculated by the above formula is adopted as the volume V2. In the present embodiment, the volume V2 of the beam reinforcing metal fitting 1 is set to 1.0 times to 3.0 times the volume V1 of the space portion 16 to increase the strength of the beam 2 having the through holes 3 formed therein. Can be equivalent to

Further, considering that the effect on strength is small even if the length in the axial direction is increased like the conventional beam penetrating sleeve, the length A in the axial direction is set to the thickness B in the radial direction (however, B =
It is set to 0.5 to 10.0 times (d1-d2) / 2). With such a configuration, the required strength can be secured without changing the volume ratio setting of the volume V1 of the space portion 16 and the volume V2 of the beam reinforcing metal fitting 1, and the axial length of the beam reinforcing metal fitting 1 can be shortened. In addition, since the insertion angle of the pipe 15 passing through the inside of the beam reinforcing metal fitting 1 with respect to the beam 2 can be increased, the degree of freedom in attaching the pipe can be increased.

As shown in FIGS. 1 (a) and 2, the beam reinforcing metal fitting 1 has its flange portion 5 fastened to the peripheral portion of the through hole 3 of the beam 2 with bolts 9, washers 11 and nuts 10. It is firmly fixed by. Therefore,
After the beam reinforcing metal fitting 1 is fixed, as shown in FIG. 3, the pipe 15 or the like can be inserted therein.

(Second Embodiment) FIG. 4 is a side sectional view showing a usage state of a beam reinforcing metal fitting according to a second embodiment of the present invention, and FIG. 5 is a partial front view showing a usage state of the beam reinforcing metal fitting. Is. Outer peripheral portion 13 of the ring body 13 of the beam reinforcing metal fitting 12
The outer diameter d1 of a is of a size that can be fitted into the through hole 3 of the inner diameter R formed in the beam 2. No taper is formed on the outer peripheral portion 13a, and no positioning protrusion is formed. Therefore, the outer peripheral portion 13 a directly contacts the inner edge portion 3 a of the through hole 3. Further, the fastening means mounting hole 7 has 9
It is placed in 4 places at 0 degree intervals.

On the surface of the flange portion 5 facing the web portion 2w of the beam 2, there is formed a dowel holding surface 5a for holding the dowel 14 between the beam portion 2w and the web portion 2w. This allows
Between the flange portion 5 of the beam reinforcing metal member 12 and the web portion 2w of the beam 2, the dowel 14 can be sandwiched in a circular shape. The dowel 14 has an action of increasing the coefficient of friction between the beam reinforcing metal member 12 and the beam 2, and can increase the resistance force against the shearing force applied to the bolt 9 or the like. With this configuration, the number of bolts 9 can be reduced, and the mounting work can be completed in a short time.

Although the first and second embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, the number of bolts is within the range of 4 to 16. Can be increased or decreased. Also, the beam reinforcement metal fitting 1
The axial length A of the ring body 4 of the
0.5 times to 10.0 times (more preferably 0.5 times to
(5.0 times), it is possible to further reduce the waste of material, reduce the weight of the beam, and increase the degree of freedom in installing piping and the like.

(Third Embodiment) FIG. 6 is a front view showing a beam reinforcing metal fitting according to a third embodiment of the present invention, and FIG.
8 is a sectional view taken along line XX in FIG. 8, FIG. 8 is a front view showing a usage state of the beam reinforcing metal fitting shown in FIG. 6, and FIG. 9 is a side sectional view showing a usage state of the beam reinforcing metal fitting shown in FIG. 9 is a view corresponding to a sectional view taken along line YY in FIG.

In the beam reinforcing metal fittings 20 shown in FIGS. 6 to 9, parts having the same functions and effects as those of the beam reinforcing metal fittings 1 and 12 of the first and second embodiments are shown in FIGS. The same reference numerals as in the case of No. 5 are given and the description thereof is omitted.

As shown in FIGS. 6 and 7, the beam reinforcing metal fitting 20 is used.
In the above, the flange portion 23 is provided on one surface side of the outer peripheral portion 21a of the ring body 21, and the outer peripheral portion 21a has a tapered shape in which the diameter is gradually reduced toward the surface side without the flange portion 23. Here, assuming that the dimensions of each part of the beam reinforcing metal fitting 20 are represented by symbols as shown in FIGS. 6 and 7 and the number of fastening means mounting holes 7 is n, the volume V2 of the beam reinforcing metal fitting 20 is shown.
Is V2 = (πT / 3) × [(Q / 2) ² + {(Q / 2) ×
(D3 / 2)} + (d3 / 2) ² ] + (S / 2) ² πF
It can be obtained by-(d2 / 2) ² πA- (D / 2) ² πFn. Further, as shown in FIG. 9, the space portion 16 of the through hole 3 formed in the web portion 2w of the beam 2 is formed.
The volume V1 (not shown) can be calculated by V1 = R ² × π × t1 × 1/4, as in the case of calculation based on FIG. 1 (b).

In the present embodiment, the volume V2 of the beam reinforcing metal fitting 20 fixed to the through hole 3 of the beam 2 with the bolt 9 and the nut 10 is 1.0 to 1.0 of the volume V1 of the space portion 16.
The length C from the minimum outer diameter portion 21a of the ring main body 21 to the outer periphery of the flange portion 23 is set to 3.0 times or less and is half the minimum outer diameter d3 of the ring main body 21 (more preferably 1/4 or less).
In addition, the axial length F of the flange portion 23 is half or less than the axial length A of the ring body 21.
Further, the inner diameter d2 of the beam reinforcing metal fitting 20 is 0.8 times or less of the beam formation H of the beam 2. With such a configuration, the strength of the beam 2 having the through hole 3 formed therein can be made substantially equal to the strength of the non-perforated beam.

Now, referring to FIG. 10, FIG.
The beam through hole reinforcing structure constructed by using the beam reinforcing metal fittings 20 shown in FIGS. As shown in FIG. 10, in a column-beam joint structure formed by joining four horizontal beams 2 to one vertical column 24 at intervals of 90 degrees from four directions, form straight lines with each other. The beam reinforcing metal fitting 20 is provided in the through hole 3 formed in the two beams 2 arranged in FIG.
It is fixed in the state shown in FIG.

In the beam through hole reinforcing structure shown in FIG. 10, the distance 22 from the joint 25 between the column 24 and each beam 2 to the axis 20c of the beam reinforcing metal fitting 20 is twice the beam formation H of the beam 2. It is as follows. In this way, by reinforcing the through hole 3 by using the beam reinforcing metal fitting 20, the through hole 3 is fixed to the pillar 24.
Can be placed in a position close to. Therefore, it is possible to consolidate piping and wiring, which is convenient in designing a building, and the workability of various piping and wiring when constructing a building structure is significantly improved.

Generally, a region from the joint 25 between the beam 3 and the column 24 to a position separated by a distance twice the beam formation H is called a plasticizing region 26, and this region 26 is usually formed in the through hole 3. Although it was a region to avoid formation, bolt 9 and nut 1
Since the strength reduction of the beam 2 is suppressed by fixing the beam reinforcing metal fitting 20 to the through hole 3 by using 0, the same strength as the non-perforated beam can be obtained. Can be formed.

Beam reinforcing metal fitting 20 having the above-mentioned structure
Although there are some uncertainties about the reason why the beam reinforcing effect is exhibited, if the shape, the dimensional ratio of each part, the volume ratio and the like of the beam reinforcing metal fitting 20 are set as described above, the beam reinforcing metal fitting 20 By fixing the to the through hole 3 of the beam 2, the out-of-plane rigidity of the web portion 2w of the beam 2 is increased, and it is possible to prevent the out-of-plane deformation of the web portion 2w when an external force is applied to the beam 2. Guessed.

Although FIG. 10 shows the beam through hole reinforcing structure constructed by using the beam reinforcing metal fitting 20, the same beam through hole reinforcing structure can be obtained by using the other beam reinforcing metal fittings 1 and 12 described above. It is possible to construct, and it is possible to obtain the same effect as when the beam reinforcing metal fitting 20 is used.

[0044]

The present invention has the following effects.

(1) A ring body that can be fitted into a through hole formed in a beam, and a flange portion formed on the outer periphery of one side of the ring body in the axial direction are provided at the peripheral portion of the through hole. A plurality of fastening means insertion holes corresponding to the plurality of fastening means insertion holes are provided in the flange portion, and the axial length of the ring main body is 0.5 to 10.0 times (more preferably, the radial thickness). 0.5 times to 5.0 times), through holes having different sizes can be reinforced to a required strength while eliminating waste of material, and pipes can be connected to the through holes. Even if it is inserted obliquely, it will not come into contact with the beam reinforcing metal fittings, and the degree of freedom in mounting pipes and the like can be increased.

(2) The volume of the beam reinforcing metal fitting is 1.0 of the volume of the space portion formed inside the through hole formed in the beam.
By setting the number of times to 3.0 times, the through holes having different sizes are reinforced with a predetermined strength, and it is possible to prevent the weight from becoming too large.

(3) By gradually reducing the diameter of the outer peripheral portion of the ring body toward the surface without the flange portion, the work of inserting the beam into the through hole is facilitated and the working time is shortened. be able to.

(4) The length from the minimum outer diameter portion of the outer peripheral portion to the outer periphery of the flange portion is half or less of the minimum outer diameter of the outer peripheral portion, and the axial length of the flange portion is the axial length of the ring body. If it is less than half of the length, it will exert an excellent reinforcing effect when fixed to the through hole of the beam, and the strength equivalent to that of a non-perforated beam can be obtained. Through holes can be installed.

(5) The inner diameter of the ring body is set to 0.
By setting it to 8 times or less, the size of the hole for piping / wiring can be increased to 0.8 times the beam formation without causing the strength of the beam to decrease. Therefore, a plurality of through holes are provided. It is not necessary and the number of steps can be reduced.

(6) By providing three or more positioning protrusions that directly abut the inner edge of the through hole on the outer peripheral portion, the shape error of the through hole and the beam reinforcing metal fitting is absorbed and the center positions are aligned. As a result, the mounting accuracy is improved, the quality is improved, and the working time can be shortened.

(7) By providing a dowel pinching surface for pinching the dowel on the surface of the flange portion facing the beam, it becomes possible to pinch the dowel between the two and thereby the resistance to the shearing force is increased. Therefore, the number of fastening means can be reduced and the fixing work can be shortened.

(8) In a beam through-hole reinforcing structure formed by fixing the beam reinforcing metal fitting according to any one of (1) to (7) to a through hole of a beam forming a beam-column joint structure by fastening means. By setting the distance from the position where the column and beam are joined to the axis of the beam reinforcing metal fitting to be less than twice the beam formation, it is possible to place the beam through hole at a position close to the column. It is possible to improve the construction efficiency, which is convenient for the design of buildings, and the workability of piping and wiring is greatly improved.

[Brief description of drawings]

FIG. 1 (a) is a side sectional view showing a usage state of a beam reinforcing metal fitting according to a first embodiment of the present invention, and FIG. 1 (b) is (a).
FIG. 6 is a side sectional view showing a through hole of a beam to which the reinforcing metal fitting shown in FIG.

FIG. 2 is a front view showing a usage state of the beam reinforcing metal fitting shown in FIG.

FIG. 3 is a perspective view showing a usage state of the beam reinforcing metal fitting shown in FIG.

FIG. 4 is a side sectional view showing a usage state of the beam reinforcing metal fitting according to the second embodiment of the present invention.

5 is a partial front view showing a usage state of the beam reinforcing metal fitting shown in FIG. 4. FIG.

FIG. 6 is a front view showing a beam reinforcing metal fitting according to a third embodiment of the present invention.

FIG. 7 is a sectional view taken along line XX in FIG.

FIG. 8 is a front view showing a usage state of the beam reinforcing metal fitting shown in FIG.

9 is a side sectional view showing a usage state of the beam reinforcing metal fitting shown in FIG.

FIG. 10 is a perspective view showing a beam through-hole reinforcing structure constructed using the beam reinforcing metal fitting shown in FIG.

FIG. 11 is a side sectional view showing a beam through-hole sleeve which is a conventional technique.

[Explanation of symbols]

1,12,20 Beam reinforcement 2 beams 2w web department 3 through holes 3a inner edge 4,13,21 Ring body 4a, 13a, 21a outer peripheral portion 5,23 Flange 5a Gibel clamping surface 6 Fastening means insertion hole 7 Fastening means mounting hole 8 Positioning protrusion 9 bolts 10 nuts 11 washers 13 Outer periphery 14 Gibel 15 piping 16 Space Division 20c axis 22 distance 24 pillars 25 joints 26 Plasticized region H Liangnari

Continued front page    (72) Inventor Shuji Ohba             1-9-1 Kitahama, Wakamatsu-ku, Kitakyushu City, Fukuoka Prefecture               Hitachi Metals Co., Ltd. Wakamatsu Factory F term (reference) 2E163 FA12 FB02 FB23 FB42 FF01                 2E164 EA01

Claims (8)

[Claims] 1. A substantially ring-shaped beam reinforcing member fixed to a peripheral portion of a through hole formed in a beam by using fastening means, the ring body being insertable into the through hole, and the ring body. With a flange portion formed on the outer periphery of the one surface side in the axial direction, a plurality of fastening means insertion holes provided in the peripheral portion of the through hole and a fastening means mounting hole corresponding to the arrangement are provided in the flange portion, A beam reinforcing metal fitting, wherein the axial length of the ring body is 0.5 to 10.0 times the radial thickness. 2. The volume of the beam reinforcing metal fitting is 1.0 of the volume of the space portion formed inside the through hole formed in the beam.
The beam reinforcing metal fitting according to claim 1, wherein the beam reinforcing metal fitting is set to be double to 3.0 times. 3. The beam reinforcing metal fitting according to claim 1, wherein an outer peripheral portion of the ring main body is gradually reduced in diameter toward a surface side without the flange portion. 4. The length from the minimum outer diameter portion of the outer peripheral portion to the outer periphery of the flange portion is half or less of the minimum outer diameter of the outer peripheral portion, and the axial length of the flange portion is the shaft of the ring body. The beam reinforcing metal fitting according to any one of claims 1 to 3, wherein the beam reinforcing metal fitting is not more than half the length in the direction. 5. The beam reinforcing metal fitting according to claim 1, wherein an inner diameter of the ring body is 0.8 times or less of a beam formation of the beam. 6. The beam reinforcing metal fitting according to claim 1, wherein three or more positioning protrusions that directly contact the inner edge of the through hole are provided on the outer peripheral portion. 7. The surface of the flange portion facing the beam,
The beam reinforcing metal fitting according to any one of claims 1 to 6, further comprising: a dowel holding surface for holding the dowel between the beam and the beam. 8. A beam penetration formed by fixing the beam reinforcing metal fitting according to any one of claims 1 to 7 to a peripheral portion of a through hole formed in a beam forming a beam-column joint structure using fastening means. A beam through-hole reinforcing structure, characterized in that the distance from the joint position of the column and the beam to the axis of the beam reinforcing metal fitting is not more than twice the beam formation of the beam.