JP4758751B2 - Horizontal member mounting structure and beam mounting structure of building - Google Patents

Description

  The present invention relates to a horizontal member mounting structure and a small beam mounting structure of a building, such as attaching a small beam to a large beam of a building unit.

In the building unit described in Patent Document 1 and the like, as shown in FIG. The mounting piece is mounted and fixed on the upper and lower flanges of the C-shaped steel girder 1 by welding.
JP 5-33407

  The conventional mounting structure in which the mounting member 3 of the small beam 2 is welded and fixed to the large beam 1 suffices because the positioning accuracy of the mounting member 3 at the time of welding is low, and because the weld overlay is small, mounting and dimensional adjustment are easy. There is an advantage to become. However, it is difficult to improve the dimensional accuracy of the building unit because the large beam is slightly deformed by the heat effect accompanying welding.

  In addition, in order to avoid the heat influence accompanying welding, as shown in FIG. 9, it is also conceivable to connect the upper and lower mounting pieces of the mounting member 3 of the small beam 2 to the upper and lower flanges of the large beam 1 with bolts 4. . However, the head of the bolt 4 protrudes under the lower flange of the large beam 1, and the head of the bolt 4 interferes with the upper surface of another member 5 such as the foundation or the lower floor ceiling beam.

It is an object of the present invention to connect bolts to a large beam in a building without interfering with other members.

According to the first aspect of the present invention, in the small beam mounting structure in which the small beam is attached to the large beam of the building, the mounting member welded and fixed to the mounting end of the small beam is bolted to the vertical surface of the large beam, and the mounting member is the vertical surface of the large beam And a lower support piece extending horizontally from the lower end of the attachment piece, and an upper support piece extending horizontally from the upper end of the attachment piece, the attachment end of the beam being the lower support piece of the attachment member A horizontal piece that rests on both sides of the horizontal piece and rises on both sides of the horizontal piece to sandwich the upper support piece of the mounting member from both sides, and the outer surface of the lower end of the rising piece on both sides of the beam In addition, the inner surface of the upper end side of the rising piece on both sides of the beam is welded and fixed to the upper surface of the upper support piece of the mounting member .

According to a second aspect of the present invention, in the first aspect of the present invention, the small beam is made of a square steel pipe, and the mounting end is formed by removing a substantially upper half of the end of the square steel pipe. is there.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the large beam is made of a shape steel, and the attachment member is bolted to the shape steel web .

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the attachment end of the small beam is set such that the attachment interval of the attachment member with respect to the attachment piece is a margin for adjusting the attachment position of the small beam with respect to the large beam. It is what I did.

The invention of claim 5 is the invention according to any one of claims 1 to 4, wherein the large beam and the small beam constitute a building unit.

(Claim 1 )
(a) A mounting member welded and fixed to the mounting end of the small beam was bolted to the vertical surface of the large beam. Since the small beam is not bolted to the large beam and is not fixed by welding, it is possible to prevent the large beam from being deformed by the heat effect accompanying welding. Further, since the bolt is joined to the vertical surface of the large beam, the bolt does not interfere with other members arranged above and below the large beam.

(b) Place the horizontal piece of the mounting end of the beam on the lower support piece of the mounting member, and sandwich the upper support piece of the mounting member with the rising pieces on both sides. The outer surface is welded and fixed to the upper surface of the lower support piece of the attachment member, and the inner surface of the upper end side of the rising piece on both sides of the beam is welded and fixed to the upper surface of the upper support piece of the attachment member. Therefore, it is welded and fixed so as to form a closed cross-section in a state where the mounting end of the beam and the mounting member are stably aligned, and the strength (cross-sectional performance) is reduced while the mounting end of the beam is reduced in size. Without fixing, it can be firmly fixed to the mounting member by welding.

(Claim 2 )
(c) By removing the upper half of the end portion of the small beam made of a square steel pipe, the mounting end of the small beam of (b) can be easily formed.

(Claim 3 )
(d) The mounting member welded and fixed to the mounting end of the small beam can be bolted stably to the large beam web made of steel.

(Claim 4 )
(e) When crossing a small beam between opposing large beams, if the thickness of the large beam changes, the internal spacing of the large beam on which the small beam is placed will change, and the mounting position of the small beam on the large beam will change. become. In the present invention, the mounting position of the small beam with respect to the large beam can be easily adjusted while using the small beam having a fixed length by using the mounting end of the small beam as the adjustment allowance for the mounting interval of the mounting member with respect to the mounting piece.

(Claim 5 )
(f) When attaching a small beam to a large beam of a building unit, the above (a) to (e) can be realized.

  FIG. 1 is a perspective view showing a building unit, FIG. 2 is a cross-sectional view showing a mounting structure of a beam, FIG. 3 shows a beam, (A) is a front view, (B) is an end view, and FIG. (A) is a front view, (B) is a plan view, (C) is an end view, FIG. 5 is a mounting member, (A) is a front view, and (B) is a plan view. ) Is an end view, FIG. 6 is a front view showing a procedure for welding a mounting member to a small beam, FIG. 7 is a mounting position adjustment margin of the small beam, and (A) is a front view showing a case where the plate thickness of the large beam is large. , (B) is a front view showing a case where the plate thickness of the large beam is small, FIG. 8 is a front view showing a conventional example, and FIG. 9 is a front view showing a reference example.

  An example in which the present invention is applied to a building unit 10 will be described. As shown in FIG. 1, the building unit 10 of the present embodiment spans a C-shaped steel floor beam 21 between the lower end portions of four square steel pipe columns 11 and also forms a C shape between the upper end portions of the columns 11. This is a box-shaped frame structure in which steel ceiling beams 31 are bridged. In the building unit 10, a square steel pipe floor beam 22 is bridged to an opposing floor beam 21 via an attachment member 23, and floor joists and floor materials (not shown) are provided on the upper surface of the floor beam 22. . In the building unit 10, a ceiling joist 32 is bridged between the opposing ceiling beams 31, and a ceiling surface material (not shown) is provided on the lower surface of the ceiling joist 32.

  As shown in FIG. 2, the building unit 10 has an attachment member 22 welded and fixed to the left and right attachment ends of the floor beam 22, and the vertical surface 21 </ b> A of the opposite floor beam 22 (in the web of the floor beam 21, To the inner surface), and the upper and lower bolts 24 are bolted together.

  As shown in FIG. 2, the floor girder 21 is made of C-shaped steel as described above, and a mounting member 23 is bolted to the shaped steel web with bolts 24. The bolt 24 is inserted into the bolt insertion hole 24A of the floor large beam 21 and the bolt insertion hole 24B of the mounting member 23 from the outer surface of the web of the floor large beam 21 via the washer 25, and the nut 26 is screwed to the insertion end. Then, the mounting member 23 is fastened to the floor girder 21.

  As shown in FIGS. 2 to 4, the floor beam 22 is composed of a square steel pipe as described above. The upper half A of the end of the square steel pipe (the upper surface of the square steel pipe and the upper part of both side surfaces). ) Is deleted to form the aforementioned mounting end.

  As shown in FIGS. 2 and 5, the mounting member 23 is substantially U-shaped when viewed from the front. The mounting member 23A is bolted to the vertical surface (web) 21A of the floor beam 21 and the lower end of the mounting piece 23A. And a lower support piece 23B extending horizontally from the top and an upper support piece 23C extending horizontally from the upper end of the mounting piece 23A. The bolt insertion holes 24B described above are formed in the upper and lower positions of the attachment piece 23A. The lower support piece 23B has the same width as the attachment piece 23A, and the upper support piece 23C has a narrower width than the attachment piece 23A.

  As described above, the upper end A of the end portion of the square steel pipe is substantially eliminated from the mounting end of the floor beam 22 and the horizontal piece 22A mounted on the lower support piece 23B of the mounting member 23 and the horizontal piece 22A. And the rising pieces 22B on both sides that sandwich the upper support piece 23C of the mounting member 23 from both sides. The lower support piece 23B of the mounting member 23 is wider than the outer width (outer width of the square steel pipe) of both side rising pieces 22B of the floor beam 22, and the upper support piece 23C of the mounting member 23 is raised on both sides of the floor beam 22. The width is slightly narrower than the inner width of the piece 22B (inner width of the square steel pipe).

The welding procedure of the attachment member 23 to the attachment end of the floor beam 22 is as follows (FIG. 6).
(1) The horizontal piece 22A at the attachment end of the floor beam 22 is placed on the lower support piece 23B of the attachment member 23, and the upper support piece 23C of the attachment member 23 is sandwiched between the rising pieces 22B on both sides. At this time, the attachment end K of the floor beam 22 is set to an attachment position adjustment margin of the floor beam 22 with respect to the floor beam 21 described later.

  (2) The outer surface of the lower end portion of the rising piece 22B on both sides of the floor beam 22 is welded and fixed to the upper surface of the lower support piece 23B of the mounting member 23 with a welded portion 27A. Next, the inner surface on the upper end side of the rising piece 22B on both sides of the floor beam 22 is welded and fixed to the upper surface of the upper support piece 23C of the attachment member 23 by the welding portion 27B.

  Therefore, in the building unit 10, the mounting pieces 23 </ b> A of the mounting member 23 welded and fixed to the left and right mounting ends of the floor beam 22 as described above are attached to the vertical surface of the opposing floor beam 21 (the web of the floor beam 21. The floor girder 21 and the mounting member 23 can be attached to the floor girder 21 by bolting the floor girder 21 and the mounting member 23 with bolts 24.

  Even if the plate thickness of the floor beam 21 changes due to the type change of the building unit 10, the outer space L 1 formed by the outer web surfaces of the opposing floor beam 21 of the building unit 10 is fixed, and the floor beam 21 The internal spacing L2 formed by the inner surfaces of the webs varies, and as a result, the mounting position of the floor beam 22 with respect to the floor beam 21 varies. In the present embodiment, the mounting end K of the floor beam 22 with respect to the mounting piece 23 </ b> A of the mounting member 23 is used as the adjustment position for adjusting the mounting position of the floor beam 22 with respect to the floor beam 21. The variation in the mounting position can be absorbed by increasing / decreasing the adjustment allowance K. FIG. 7A shows a case where the plate thickness of the floor girder 21 is large and the mounting interval K is decreased, and FIG. 7B shows a case where the plate thickness of the floor girder 21 is small and the mounting interval K is increased.

According to the present embodiment, the following operational effects can be obtained.
(a) The attachment member 23 welded and fixed to the attachment end of the floor beam 22 is bolted to the vertical surface 21A of the floor beam 21. Since the floor beam 22 is not bolted to the floor beam 21 and fixed by welding, it is possible to prevent the floor beam 21 from being deformed by the heat effect accompanying welding. Moreover, since the bolt 24 is joined to the vertical surface 21A of the floor girder 21, the bolt 24 does not interfere with other members disposed above and below the floor girder 21.

  (b) In the state where the horizontal piece 22A of the attachment end of the floor beam 22 is placed on the lower support piece 23B of the attachment member 23 and the upper support piece 23C of the attachment member 23 is sandwiched between the rising pieces 22B on both sides, The outer surface of the lower end portion of the rising piece 22B on both sides of 22 is welded and fixed to the upper surface of the lower support piece 23B of the mounting member 23, and the inner surface on the upper end side of the rising piece 22B on both sides of the floor beam 22 is fixed on the mounting member 23. It fixes to the upper surface of the support piece 23C by welding. Accordingly, the mounting end of the floor beam 22 and the mounting member 23 are stably aligned so as to form a closed cross-section, and the strength ( It can be firmly fixed to the mounting member 23 by welding without reducing the cross-sectional performance).

  (c) By removing substantially the upper half A of the end portion of the floor beam 22 made of a square steel pipe, the mounting end of the floor beam 22 in (b) can be easily formed.

  (d) The mounting member 23 welded and fixed to the mounting end of the floor beam 22 can be bolted stably to the web 21A of the floor beam 21 made of steel.

  (e) When the thickness of the floor girder 21 is changed when the floor girder 22 is bridged between the opposing floor girder 21, the internal spacing of the floor girder 21 in which the floor girder 22 is arranged fluctuates. The mounting position of the floor beam 22 with respect to the large beam 21 varies. In the present invention, the mounting end of the floor beam 22 uses the mounting interval K of the mounting member 23 with respect to the mounting piece 23A as an adjustment allowance, so that the floor beam 22 with respect to the floor beam 21 is used while using the floor beam 22 having a certain length. Can be easily adjusted.

  (f) The above-described (a) to (e) can be realized when the floor beam 22 is attached to the floor beam 21 of the building unit 10.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, the present invention is not limited to the building unit, the girder widely buildings, upon attaching the joists can be applied to as to bolted a mounting member which is welded to the attachment end of the joists in a vertical plane of the girder.

FIG. 1 is a perspective view showing a building unit. FIG. 2 is a cross-sectional view showing a mounting structure of a small beam. FIG. 3 shows a large beam, (A) is a front view, and (B) is an end view. 4A and 4B show the attachment end of the beam, where FIG. 4A is a front view, FIG. 4B is a plan view, and FIG. 4C is an end view. 5A and 5B show a mounting member, where FIG. 5A is a front view, FIG. 5B is a plan view, and FIG. 5C is an end view. FIG. 6 is a front view showing a procedure for welding the attachment member to the beam. FIGS. 7A and 7B show the mounting position adjustment margin of the small beam, FIG. 7A is a front view showing a case where the plate thickness of the large beam is large, and FIG. 7B is a front view showing a case where the plate thickness of the large beam is small. FIG. 8 is a front view showing a conventional example. FIG. 9 is a front view showing a reference example.

Explanation of symbols

10 Building unit 21 Floor girder
21A Vertical surface (web)
22 Floor beam (beam)
22A Horizontal piece 22B Rising piece 23 Mounting member 23A Mounting piece 23B Lower support piece 23C Upper support piece 24 Bolts 27A, 27B Welded part

Claims (5)

In the small beam mounting structure that attaches the small beam to the large beam of the building,
Bolt the mounting member welded and fixed to the mounting end of the small beam to the vertical surface of the large beam ,
The mounting member has a mounting piece that is bolted to the vertical surface of the large beam, a lower support piece that extends horizontally from the lower end of the mounting piece, and an upper support piece that extends horizontally from the upper end of the mounting piece,
A horizontal piece on which the mounting end of the beam is placed on the lower support piece of the attachment member, and rising pieces on both sides that rise from both sides of the horizontal piece and sandwich the upper support piece of the attachment member from both sides,
The outer surface of the lower end of the rising piece on both sides of the beam is welded and fixed to the upper surface of the lower support piece of the mounting member, and the inner surface of the upper end side of the rising piece on both sides of the beam is welded to the upper surface of the upper support piece of the mounting member A building beam mounting structure characterized by being fixed . The building beam mounting structure for a building according to claim 1 , wherein the small beam is formed of a square steel pipe, and the upper end part of the end part of the square steel pipe is deleted to form the attachment end. The small beam mounting structure for a building according to claim 1 or 2 , wherein the large beam is made of a section steel, and the mounting member is bolted to a web of the section steel. The building beam mounting structure for a building according to any one of claims 1 to 3 , wherein a mounting interval between the mounting end of the beam beam and the mounting piece of the mounting member is used as a margin for adjusting a mounting position of the beam beam with respect to the beam. The building small beam mounting structure according to any one of claims 1 to 4 , wherein the large beam and the small beam constitute a building unit.

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