JP2826098B2 - Beam frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam structure in a floor structure or a roof structure of a house.

[0002]

2. Description of the Related Art Beam structures in a conventional floor structure are described below.
This will be described with reference to FIGS. The example of FIG.
A small beam 81 of H-section steel is joined to a large beam 80 of H-section steel which is arranged orthogonal to each other via a joining plate 85. A mounting piece 83 is welded to the web 82 of the girder 80, the end of the floor beam 81 abuts against the side surface of the girder 80, and the joining plate 85 is superimposed on the mounting piece 83 and the web 84 of the floor girder 81. The bolt 89 is inserted through the bolt insertion hole 88 of the joining plate 85, the bolt insertion hole 86 of the mounting piece 83, and the bolt insertion hole 87 of the web 84 of the floor beam 81, and fastened and fixed with a nut (not shown).

FIG. 16 shows a web 8 of a girder 80.
2, an L-shaped bracket 90 is fixed with bolts 92, and bolts 89
To the bolt insertion hole 91 of the L-shaped bracket 90 and the floor beam 81
Through the bolt insertion hole 87 of the web 84 and fastened and fixed with a nut (not shown).

[0004]

In the example of FIG. 15, when welding the mounting piece 83 to the web 82 of the girder 80, it is necessary to design the girder 80 after determining the position of the floor girder 81 in advance. However, there is a problem that it is difficult to flexibly cope with the problem and the cost increases due to the welding process. In addition, there is a possibility that distortion occurs in the girder 80 due to welding, and the girder 80 is not suitable when the girder 80 is made of a thin lightweight H-section steel.

In the example shown in FIG. 16, an L-shaped fitting 90 is provided at the center of the web 82 of the girder 80, and it has been difficult to prevent lateral buckling of the girder 80 made of lightweight H-section steel. Further, in the case of the L-shaped bracket 90, there is a disadvantage that the bracket is twisted. An object of the present invention is to provide a beam frame which is inexpensive, has excellent workability, has high joining strength, and does not cause distortion or lateral buckling even when a lightweight H-beam is used.

[0006]

According to a first aspect of the present invention, there is provided a beam frame, comprising: a girder made of an H-beam; a small girder made of an H-shaped steel orthogonally arranged on a side of the girder; A pair of large beam attachment pieces that are vertically separated on one side and are bent at substantially right angles in opposite directions to be joined to the large beam web, and a small beam web on the other side. And a bonded small beam attachment piece.

According to the beam frame of the first aspect, the joint is formed by bending a steel plate, there are no welded portions, the strength is stable, and the cost is low and the productivity is high.
Excellent workability. Also, since the beam attachment piece is joined to the web of the beam, the axis of symmetry of the beam is located along the central axis of the joint, and when a load is applied to the beam, the load is biased to the joint. It does not take care, the joint is not deformed much, and the joint strength between the girder and the girder is stabilized.

According to a second aspect of the present invention, there is provided a beam frame according to the first aspect, wherein a height dimension of the joint is substantially equal to a distance between upper and lower flanges of the large beam. It is bonded to the web. According to the beam frame of the second aspect, in addition to the function of the first aspect, the joint is formed so as to be substantially equal to the distance between the upper and lower flanges of the girder. Is unlikely to occur. In addition, the pair of girder attachment pieces of the joint fitting are joined to the girder web in the vicinity of the high-strength girder of the girder, and when the external force acts on the girder, the girder is prevented from being twisted in the longitudinal direction. it can.

According to a third aspect of the present invention, there is provided the beam frame according to the first or second aspect, wherein the separated portion vertically separated from the pair of large beam mounting pieces is an extension of the neutral axis at the center in the height direction of the small beam mounting pieces. Is substantially the same as According to the third aspect of the present invention, in addition to the function of the first or second aspect, the separated portion vertically separated from the pair of large beam mounting pieces extends the neutral axis at the center in the height direction of the small beam mounting pieces. Since the line substantially coincides with the line, it is possible to prevent the large beam from being twisted in the longitudinal direction when an external force acts on the small beam.

According to a fourth aspect of the present invention, in the first or second or third aspect, the cantilever is disposed orthogonally to the large beam on a side surface of the large beam opposite to the side where the small beam is joined. The reinforcement beam is joined to the web of the girder, a reinforcing beam mounting portion parallel to the web of the girder is formed in the joint fitting, and the reinforcement beam is joined to the reinforcement beam mounting portion by being arranged orthogonally to the girder. Claim 4
According to the beam frame described above, the bending moment of the cantilever can be reliably supported by the reinforcing beam, and the large beam can be prevented from being twisted in the longitudinal direction, in addition to the operation of claim 1, claim 2, or claim 3. Further, the cantilever constituting the structure such as the balcony and the eaves is not displaced by an external force such as a load.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 to 3, reference numeral 10 denotes a large beam made of an H-shaped steel, and reference numeral 11 denotes a substantially H-shaped floor beam formed by welding a pair of lip channel steels back to back. The girder 10 and the floor girder 11 are arranged orthogonal to each other, and the end of the floor girder 11 is joined to the web 13 of the girder 10 by a joint fitting 12.

Here, the joining fitting will be described in detail with reference to FIGS. First, the joining fitting 20 shown in FIGS. 4 to 6 will be described. A cut 21 is made in one side of the joint fitting 20 to be separated vertically, and bent in a substantially right angle in the opposite direction to form a pair of girder attachment pieces 22 and 23. Bolt insertion holes 25 and 26 are formed at the upper end of the upper girder mounting piece 22 and the lower end of the lower girder mounting piece 23, respectively. In addition, a small beam mounting piece 2 is
4 and a bolt insertion hole 27 above and below the beam attachment piece 24.
To form

Next, the joining fitting 30 shown in FIGS.
Will be described. A notch 31 is formed in one side of the joint fitting 30 to be separated into upper and lower parts, and bent at substantially right angles in opposite directions to form a pair of large beam attachment pieces 32 and 33. Bolt insertion holes 36 and 37 are formed at the upper end of the upper beam attachment piece 32 and at the lower end of the lower beam attachment piece 33, respectively. On the other side of the joint fitting 30, a small beam attachment piece 34 is projected via a step 35, and a bolt insertion hole 38 is formed above and below the small beam attachment piece 34.

The joint fitting 12 shown in FIGS. 1 to 3 is a joint fitting having a shape in which a small beam mounting piece is protruded without passing through the step shown in FIGS. 1 to 3,
40 is a cut, 41 and 42 are large beam attachment pieces, and 43 is a small beam attachment piece. The notch 40 is formed at a position substantially coincident with the extension of the neutral axis L at the center in the height direction of the small beam attachment piece 43. The joining metal fittings 12 are the upper and lower flanges 1 of the girder 10.
Bolt insertion holes (not shown) formed in the web 13 of the girder 10 and formed at the upper end of the girder mounting piece 41 and the lower end of the girder mounting piece 42 are formed at a height dimension substantially equal to the interval between 4 and 15. The bolts 44 and 45 are inserted into the bolt insertion holes (not shown), and are fastened and fixed with nuts. Further, the small beam attachment piece 43 of the joint fitting 12 is aligned with the web 18 of the floor small beam 11, and a bolt 46 is inserted into the bolt insertion hole (not shown) of the web 18 and the small beam attachment piece 43 and fastened with a nut. Fix it. Thus, the large beam 10 and the floor small beam 11 are joined.

FIG. 10 shows an example in which a joint fitting having a shape in which a small beam mounting piece is protruded through the step shown in FIGS. 7 to 9 is used. The same parts as those in the example of FIG. The description is omitted here. In FIG. 10, the small beam attachment piece 43 of the joint 12 ′ is protruded through the step 47, and when joined to the floor beam 11, the center of the joint 12 ′ and the center of the floor beam 11 are joined. Approximately match.

According to the beam frame constructed as described above, the joint fitting 12 is formed by bending a steel plate, has no welded portions, has a stable strength, is inexpensive and has high productivity, Strain can be prevented from being generated in the girder 10 by welding, and the workability is also excellent. In addition, since the joint 12 is fixed to the web 13 of the girder 10 with the bolts 44 and 45, the joint 12 can be fixed at any position on the web 13.

Further, since a pair of large beam attachment pieces 41 and 42 are formed on one side of the joint fitting 12 at substantially right angles in opposite directions to each other, the joint fitting 12 is less likely to be twisted and has a high joining strength. Further, since the small beam attachment piece 43 is joined to the web 18 of the small beam 11, the symmetric axis of the small beam 11 is located along the central axis of the joint fitting 12, and when a load acts on the small beam 11, the joining is performed. The load is not eccentric to the metal fitting 12, the deformation of the bonding metal 12 is small, and the bonding strength between the large beam 10 and the small beam 11 is stabilized.

The joint 12 is formed to be substantially equal to the interval between the upper and lower flanges 14 and 15 of the girder 10, and the joint 12 acts as a reinforcing plate for the girder 10,
Hardly cause lateral buckling. Further, the pair of girder attachment pieces 41 and 42 of the joint fitting 12 are connected to the web 1 of the girder 10 in the vicinity of the high-strength funnels 14 and 15 of the girder 10 respectively.
3, when the external force acts on the small beam 11, the large beam 10 can be prevented from being twisted in the longitudinal direction.

Further, since the cuts 40 vertically separated from the pair of girder attachment pieces 41 and 42 substantially coincide with the extension of the neutral axis L at the center of the small beam attachment piece 43 in the height direction, external force is applied to the small beam 11. When it acts, the girder 10 can be prevented from being twisted in the longitudinal direction. In addition, the joining fitting 12 includes bolts 44 and 45.
Is fixed to the web 13 of the girder 10, and the fixing position can be freely selected.

Further, the height of the joint fitting 12 is
0, the distance between the upper and lower flanges 14, 15 is substantially equal, and bolt insertion holes are formed at the upper and lower ends of the large beam mounting pieces 41, 42,
Since the flanges 14 and 15 are fixed by the bolts 44 and 45 in the vicinity of the flanges 14 and 15, the flanges 14 and 15 of the large beam 10 can be effectively restrained, lateral buckling of the large beam 10 can be prevented, and the beam performance can be sufficiently exhibited.

Another embodiment of the present invention will be described with reference to FIGS. 11 to 14, 50 is a girder, 51 is a floor beam, 52 is a joint fitting, 53
Is a cantilever, and 54 is a reinforcing beam. In FIG. 11, the cantilever 53 has a horizontal cross section, and the reinforcing beam 54 is omitted. The girder 50 is made of an H-shaped steel, and the floor beam 51 is formed by welding a pair of lip channel steels back-to-back in a substantially H-shape. The girder 50 and the floor beam 51 are arranged orthogonal to each other, and the end of the floor girder 51 is connected to the web 57 of the girder 50 by the joint fitting 52.
It is joined to. The joining metal fittings 52 include the girder mounting pieces 58 and 5.
9 is joined to the web 57 of the girder 50 by a bolt 65, and the small beam attachment piece 60 is joined to the web 61 of the small beam 51 by a bolt 66. The notch 57 that separates the upper and lower beam attachment pieces 58 and 59 is formed at a location substantially coincident with the extension of the neutral axis L in the center of the small beam attachment piece 60 in the height direction.

The cantilever 53 is arranged orthogonally to the opposite side of the small beam 51 with the large beam 50 interposed therebetween. The cantilever 53 is made of H-shaped steel, and an end plate 62 is joined by bolts 64 to a fixture 63 fixed to the web 57 of the girder 50 by bolts 65. In addition, the reinforcing beam 54 is
Are provided along the upper side of the. The reinforcing beam 54 is made of H-shaped steel, and the reinforcing beam fixing portion 6 is welded in parallel with the web 57 of the large beam 50 above the small beam mounting piece 60 of the joint fitting 52.
8, an end plate 69 is joined by bolts 67.

In the beam frame constructed as described above,
The same effect as the beam frame of the first embodiment can be obtained. Furthermore, the bending moment of the cantilever 53 is
Thus, the girder 50 can be prevented from being twisted in the longitudinal direction. In addition, the cantilever 53 constituting a structure such as a balcony or an eave is not displaced by an external force such as a load. The reinforcing beam 54 may be provided below the small beam 51. In this case, the joint fitting 52 has a reinforcing beam fixing portion formed below the small beam attachment piece.

In each of the above embodiments, the girder 10,
Although the present invention relates to a floor structure in which the beam 50 and the floor beams 11, 51 are joined, the invention may be applied to a roof structure in which a large beam and a roof beam are joined.

[0025]

According to the beam frame according to the first aspect, the joint is formed by bending a steel plate, has no welded portion, has a stable strength, is inexpensive and has high productivity,
Excellent workability. Also, since the beam attachment piece is joined to the web of the beam, the axis of symmetry of the beam is located along the central axis of the joint, and when a load is applied to the beam, the load is biased to the joint. It is possible to obtain the effect that the joint fitting is not deformed much and the joint strength between the large beam and the small beam is stabilized.

According to the beam frame of the second aspect, the first aspect
In addition to the effects described above, the joint is formed substantially equal to the distance between the upper and lower flanges of the girder, and the joint acts as a reinforcing plate for the girder, so that the girder is less likely to suffer lateral buckling. In addition, the pair of girder attachment pieces of the joint fitting are joined to the girder web in the vicinity of the high-strength girder of the girder, and when the external force acts on the girder, the girder is prevented from being twisted in the longitudinal direction. The effect that it can be obtained is obtained.

According to the third aspect of the present invention, there is provided a beam frame.
Alternatively, in addition to the effect of the second aspect, an external force acts on the small beam because the separated portions vertically separated from the pair of large beam mounting pieces substantially coincide with the extension of the neutral axis in the height direction center of the small beam mounting piece. In this case, it is possible to obtain an effect of suppressing the girder from being twisted in the longitudinal direction. According to the beam frame of the fourth aspect, in addition to the effects of the first, second, or third aspects, the bending moment of the cantilever can be reliably supported by the reinforcing beam, and the large beam is prevented from being twisted in the longitudinal direction. it can. Further, there is obtained an effect that the cantilever beam forming the structure such as the balcony and the eaves is not displaced by an external force such as a load.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a plan view of the joining fitting according to the embodiment of the present invention.

FIG. 5 is a front view of the joining fitting according to the embodiment of the present invention.

FIG. 6 is a side view of the joining fitting according to the embodiment of the present invention.

FIG. 7 is a plan view of a modified example of the joint fitting according to the embodiment of the present invention.

FIG. 8 is a front view of a modification of the joining fitting according to the embodiment of the present invention.

FIG. 9 is a side view of a modification of the joint fitting according to the embodiment of the present invention.

FIG. 10 is a plan view of a modification of the embodiment of the present invention.

FIG. 11 is a plan view of another embodiment of the present invention.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 11;

FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 11;

FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 11;

FIG. 15 is an exploded perspective view of a conventional example.

FIG. 16 is an exploded perspective view of another conventional example.

[Explanation of symbols]

10,50 girders 11,51 floor girder 12,12 ', 20,30,52 joint fittings 22,23,32,33,41,42,58,59 girder mounting pieces 24,34,43,60 girder mounting Cantilever 53 Cantilever 54 Reinforcement beam 68 Reinforcement beam attachment part L Neutral axis

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Koji Yamaguchi 1-4-1 Shinsenri Nishimachi, Toyonaka-shi, Osaka National Housing Industry Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 5/02 E04B 1/24 E04B 1/58 506

Claims (4)

(57) [Claims] 1. A beam frame comprising: a girder made of an H-beam, a girder made of an H-beam arranged orthogonally to the side of the girder, and a joint fitting connecting the girder and the girder. The joining metal fittings were vertically separated on one side and bent at substantially right angles in opposite directions to be joined to the web of the girders, and joined to the web of the girder on the other side. A beam frame having a small beam mounting piece. 2. The beam frame according to claim 1, wherein the height of the joint is substantially equal to the distance between the upper and lower flanges of the girder, and each of the pair of girder mounting pieces is joined to the girder web near the hanger of the girder. 3. The beam frame according to claim 1 or 2, wherein the separated portions vertically separated from the pair of girder attachment pieces substantially coincide with the extension line of the neutral axis at the center in the height direction of the small beam attachment pieces. 4. A cantilever beam is joined to a web of a girder beam on a side surface of a girder beam opposite to a side where a small beam is joined, and the cantilever beam is joined to a web of the girder beam. The beam frame according to claim 1, wherein a mounting portion is formed, and the reinforcing beam is joined to the reinforcing beam mounting portion so as to be orthogonal to the large beam.