JP2007332615A - Beam joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance workability in joining a beam on the strong side to a beam on the weak side at right angles to each other and to secure airtightness. <P>SOLUTION: To connect the beam 1 on the strong side to the beam 2 on the weak side at right angles to each other, a flat plate 3 is secured to an end of the beam 2, and a fitting 4 having a web secured piece 4a abutting and secured to the web 1b of the beam 1 and a flat plate secured piece 4b secured to the flat plate 3 is positioned on the beam 1, with the web secured piece 4a secured to the web 1b. The flat plate 3 secured to the end of the beam 2 is secured to the flat plate secured piece 4b. The fitting 4 has opposite pieces 4c, 4d which are opposite respectively to the upper flange 1a and the lower flange 1c of the beam 1. An airtight material 5 is disposed between the upper flange 1a, the lower flange 1c, and the opposite pieces 4c, 4d to maintain airtightness. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joint structure for joining a beam and a beam at a right angle, and in particular, improves workability by using a joint fitting that fits into a space formed by upper and lower flanges and a web of the beam to be joined. In addition, the present invention relates to a beam joining structure that can exhibit airtightness by interposing an airtight material.

  In a building having a steel frame, generally, steel beams constituting the frame are joined at a right angle. For example, when joining a beam (a losing beam) arranged at a right angle to a beam arranged in one direction (a winning beam), a fixed piece fixed to the web of the winning beam It is common to use a T-shaped or L-shaped joint hardware consisting of an upright piece fixed to the web of the losing beam (see, for example, Patent Document 1).

  On the other hand, as described in Patent Document 1, an airtight surface may be formed along the losing beam. In such a joint portion of the beam, a gap is formed between the concave surface composed of the upper and lower flanges and the web on the side surface of the winning beam and the joint hardware and the upper and lower flanges and the web of the losing beam. For this reason, airtightness is ensured by enclosing the joint end portion with an airtight cover and covering the joint portion by using a foamed airtight sheet or aluminum tape to cover the joint portion.

Japanese Patent No. 3422477

  In the technique of Patent Literature 1, although airtightness can be ensured, an airtight cover that covers the joint portion is essential. This airtight cover requires airtight covers with various shapes depending on the housing conditions such as the difference in the parts such as the protruding corners, the entrance corners, and the flats, and the difference in the cross section of the beam used. And management of construction may be complicated.

  In addition, the shape of attaching an airtight sheet or aluminum tape becomes complicated, and there is a possibility that the construction becomes complicated. In particular, since the construction time is after a steel frame is assembled, there is a problem that workability is high and workability is poor. In this case, there is a risk of problems such as a two-step operation including a casing operation and an airtight operation, which takes a construction period.

  An object of the present invention is to improve the workability when joining the other beam at a right angle to one beam, and to ensure the airtightness of the joint portion during the frame work. Is to provide.

  In order to solve the above-mentioned problems, the beam joining structure according to the present invention is a beam joining structure in which a losing beam is joined to a winning beam at a right angle, and a flat plate is fixed to the end of the losing beam. A joining bracket having a web fixing piece fixed in contact with the web surface of the winning beam and a flat plate fixing piece fixed in contact with the flat plate fixed to the end of the losing beam. Place the losing beam in the winning beam at the position to be joined, fix the web fixing piece to the winning beam web, and fix the flat plate fixed to the end of the losing beam on the winning beam It is fixed to the flat plate fixing piece of the joint metal fitting so as to be parallel to the web of the beam.

  In the above-mentioned beam joining structure, the joining bracket has flange facing pieces facing the upper and lower flanges of the winning beam, and each flange facing piece of the winning beam upper flange and lower flange and the joining bracket. It is preferable to arrange an airtight material between them to maintain airtightness.

  Further, in any of the above-mentioned beam joining structures, the flat plate fixing piece of the joining bracket has a flange portion facing the upper flange edge and the lower flange edge of the winning beam, and the flange portion wins the web fixing piece. When fixed to the web of the beam on the side, it is preferable that the beam is configured to be opposed to and close to the upper flange edge and the lower flange edge of the winning beam.

  In the first joining structure according to the present invention, it is possible to facilitate the work when joining the losing beam at a right angle to the winning beam. That is, prepare a joining fixture having a web fixing piece fixed to the web of the winning beam and a flat plate fixing piece fixed to the flat plate fixed to the end of the losing beam, and the end of the losing beam By fixing the flat plate to the part, when the web fixing piece of the joint fitting is fixed to the web of the winning beam, the position of the flat fixing piece should be in the same plane as the flange edge of the winning beam. By securing the flat plate of the beam on the losing side, a right angle can be secured and attached.

  Further, in the second joining structure, the joining metal fitting has an opposing piece that opposes the upper flange and the lower flange in the winning beam in addition to the web fixing piece and the flat plate fixing piece. By disposing an airtight material between the facing piece and the opposing piece, a gap formed between the side surface of the winning beam and the joint fitting can be closed by the airtight material. For this reason, it is possible to ensure airtightness at a portion where the losing beam is joined at right angles to the winning beam.

  Further, in the third joining structure, the flat plate fixing pieces constituting the fitting are configured so as to be close to and opposed to the upper flange edge and the lower flange edge of the winning beam. An airtight material can be sandwiched between the flange edge. For this reason, more reliable airtightness can be ensured.

  Next, the most preferable form of the beam joining structure according to the present invention will be described. The beam joining structure of the present invention is such that when a losing beam made of H-shape steel is joined to a winning beam made of H-shape steel constituting a steel frame of a building at a right angle, a web fixing piece and a flat plate fixing piece Workability is improved by using a joint metal fitting that has an airtight material between the upper and lower flanges that make up the winning beam and the opposing piece that makes up the joint metal fitting, ensuring airtightness. Is.

  The metal joint has a web fixing piece and a flat plate fixing piece, and these fixing pieces are arranged in parallel. The distance between the web fixing piece and the flat plate fixing piece is preferably substantially the same as or slightly larger than the distance between the web surface and the flange edge of the winning beam. In particular, when high airtightness is maintained between the winning beam and the joining bracket, the web fixing piece and the flat plate fixing piece are joined via the opposing pieces facing the upper flange and the lower flange, respectively. Furthermore, it is preferable to configure the flat plate fixing piece with a shape and size that can be opposed to and close to the upper and lower flange edges of the winning beam.

  When joining the losing beam at right angles to the winning beam via the joint fitting, the joining surface between the web fixing piece of the joining fitting and the web surface of the winning beam, and the flat plate fixing piece and the losing beam About the joint surface with the flat plate fixed to the edge part of this, airtightness is ensured by contact | abutting (surface joining).

  When connecting the losing beam to the winning beam at a right angle via the joining bracket, between the web fixing piece of the joining bracket and the web surface of the winning beam, the end of the flat plate fixing piece and the losing beam When an airtight material is interposed between the flat plate fixed to the part, it is preferable to secure the airtightness, but joining via an elastic body inhibits rigid joining. For this reason, it is preferable that a web fixing piece and a flat plate fixing piece can contact | abut with respect to the web and flat plate used as fixing object respectively, respectively, without a gap.

  The flange facing pieces facing the upper flange and the lower flange are configured so as to ensure airtightness by sandwiching an airtight material between the flange facing pieces and each flange. For this reason, it is preferable to have a gradient from the flange edge side to the web surface side so that the airtight material disposed between the flanges can be reliably sandwiched.

  The vertical dimension of the flat plate fixing piece is substantially equal to or slightly smaller than the distance between the opposing surfaces of the upper and lower flanges of the winning beam (substantially equal to the length of the web), or substantially the same as the distance between the surfaces of the upper and lower flanges. Preferably equal or slightly smaller. When the flat plate fixing piece has such dimensions, the joining bracket enters the space formed by the upper and lower flanges and the web in the winning beam, or the upper and lower ends of the flat plate fixing piece are in the winning beam. When the joint metal fitting is fixed to the web of the winning beam facing the upper and lower flange openings in the case, it is possible to sandwich an airtight material in the gap formed between the flat plate fixing piece and each flange opening.

  The material of the airtight material is not particularly limited, and any material can be used as long as it has appropriate elasticity and flexibility and sufficient airtightness. The shape of the airtight material is not particularly limited, and may be a sheet shape having an appropriate thickness. The sheet-like airtight material is preferably longer than the length of the flange of the winning beam (the length from the web to the end surface), and the portion protruding from the end surface of the flange is the flat plate fixing piece of the joint fitting and the flange edge It is preferable to be formed so as to ensure airtightness by being sandwiched between the two.

  The hermetic material is disposed between the upper flange and the joint fitting and between the lower flange and the joint fitting without any gap. For this reason, an airtight material may be a sheet piece which can be inserted | pinched between each. However, an extremely thin sheet (for example, a mild steel sheet or an aluminum sheet) is formed into a U shape corresponding to the shape of the upper and lower flanges and the web, and bonded to a piece corresponding to the flange of the sheet. It is preferable. By using such an airtight member, it is possible to easily attach the airtight member, and it is possible to advance the airtight operation only by the frame work without using the airtight work.

  Next, the joint structure according to the first embodiment will be described with reference to the drawings. FIG. 1 is a developed view for explaining the joint structure according to the first embodiment. FIG. 2 is a perspective view for explaining a state in which the joint fitting is fixed to the winning beam. FIG. 3 is a diagram illustrating a state in which the losing side beam is joined to the joining bracket fixed to the winning side beam.

  The joining structure shown in the figure is such that a losing beam 2 (hereinafter referred to as “beam 2”) is joined at right angles to a winning beam 1 (hereinafter referred to as “beam 1”). In addition to fixing the fixed flat plate 3 to the joint fitting 4 and sandwiching an airtight material 5 between the joint fitting 4 and the beam 1, it is configured to ensure airtightness.

  As shown in the figure, the beam 1 is configured as an H-shaped steel made up of an upper flange 1a, a web 1b, and a lower flange 1c, and a plurality of bolt holes 1d are formed at predetermined positions on the web 1b. Similarly, the beam 2 is formed as an H-shaped steel made up of an upper flange 2a, a web 2b, and a flange 2c, and a flat plate 3 having a plurality of bolt holes 3a formed at the end in the longitudinal direction is a means such as welding. It is fixed with.

  The joining metal fitting 4 has a web fixing piece 4a fixed to the web 1b of the beam 1 and a flat plate fixing piece 4b fixed to the flat plate 3 of the beam 2. The web fixing piece 4a and the flat plate fixing piece 4b are provided. Are configured to be parallel to each other. The distance between the surfaces of the web fixing piece 4a and the flat plate fixing piece 4b is substantially equal to or slightly larger than the dimension between the flange openings 1e and 1f of the flanges 1a and 1c of the beam 1 and the web 1b. ing. Therefore, when the web fixing piece 4a of the joint metal fitting 4 is fixed to the web 1b of the beam 1, the surface of the flat plate fixing piece 4b is the same surface as the surface including the flange openings 1e and 1f of the flanges 1a and 1c, or a protruding position. It is in.

  The web fixing piece 4a and the flat plate fixing piece 4b are joined via a facing piece 4c that is a flange facing piece facing the upper flange 1a of the beam 1 and a facing piece 4d that is a flange facing piece facing the lower flange 1b of the beam 1. Has been. Accordingly, the joining metal fitting 4 is formed in a substantially rectangular shape as shown in FIG. 3 when viewed from the side. The opposing pieces 4c and 4d are inclined so as to become narrower from the flat plate fixing piece 4b side to the web fixing piece 4a side so that the airtight member 5 can be easily sandwiched between these pieces and the flanges 1a and 1c. Is formed.

  The width dimension of the joint fitting 4 (width dimension of the flat plate fixing piece 4b) is set to be approximately equal to the width dimension of the flat plate 3 fixed to the end of the beam 2, and this dimension is substantially equal to the flange size of the beam 2. The length dimension of the joint fitting 4 (length dimension of the flat plate 4) is set to be smaller than the internal dimension of the upper and lower flanges 1a and 1c of the beam 1, and it is easy to fix the joint fitting 4 to the beam 1. It can be fixed to the web 1b.

  The web fixing piece 4a is formed with a bolt hole 4e through which the threaded portion of the bolt is passed at a position facing the bolt hole 1d of the beam 1, and the flat plate fixing piece 4b is a hole through which the bolt itself passes concentrically with the bolt hole 4e. 4f is formed, and a plurality of nuts 4g are fixed to the surface of the flat plate 3 facing the bolt holes 3a on the web fixing piece 4a side by means such as welding.

  In addition, in the joining metal fitting 4 of the present embodiment, the reinforcing piece 4h is disposed at substantially the center in the width direction, and means such as welding is used on the inner surfaces of the web fixing piece 4a, the flat plate fixing piece 4b, and the opposing pieces 4c and 4d. It is fixed.

  The airtight member 5 is formed in a sheet shape having elasticity and flexibility, and is provided corresponding to the flanges 1 a and 1 c of the beam 1. That is, the airtight member 5 has a length slightly longer than the length from the web 1b of each flange 1a, 1c to the respective flange edge 1e, 1f, and the bolt hole 4e formed in the web fixing piece 4a of the joint fitting 4. The width dimension is slightly smaller than the horizontal spacing dimension.

  In the airtight material 5 as described above, there is a risk that workability may be impaired when sandwiched between the facing pieces 4c, 4d of the joint fitting 4 and the flanges 1a, 1c of the beam 1. For this reason, in this embodiment, the joining member 6 is formed by bending a thin metal sheet into a U-shape, and the airtight member 5 is attached to both end portions of the joining member 6 to constitute the airtight member 7.

  The joining member 6 is made of, for example, a very thin mild steel sheet or aluminum sheet having a thickness of about 1 mm in consideration of dimensions such as the shapes of the flanges 1a and 1c and the web 1b of the beam 1 and the thickness of the airtight member 5. It is formed in a groove shape. And the airtight member 7 is formed by adhere | attaching the airtight material 5 on both flange parts of a groove type.

  Further, an airtight material 6a (which may be made of the same material as the airtight material 5) has elasticity and can exhibit airtightness inside the corners of the groove portion of the joining member 6. When the bonding fixture 4 is fixed to the beam 1, when the web fixing piece 4a comes into pressure contact with the web 1b, the web fixing piece 4a and the corners of the opposing pieces 4c, 4d come into contact with each other. It is comprised so that the property can be ensured.

  Next, the procedure for configuring the joint structure according to this embodiment will be described. As shown in FIG. 1, an airtight member 7 and a joining member metal fitting 4 are arranged at a position where the beam 2 is to be joined to the already fixed beam 1. First, the bolt insertion hole formed in the joining member 6 of the hermetic member 7 is substantially aligned with the bolt hole 1d formed in the web 1b of the beam 1 and is aligned along the web 1b. Next, the joining metal fitting 4 is brought close to the web fixing piece 4a facing the web 1b of the beam 1, the screw portion is inserted into the bolt holes 4e and 1d through the bolt 8a from the hole 4f formed in the flat plate fixing piece 4b, and the nut 8b. Is fastened to the beam 1.

  In the process of fixing the joining metal fitting 4 to the web 1b of the beam 1, the airtight material 5 of the airtight member 7 is sandwiched between the opposing pieces 4c and 4d and the upper flange 1a and the lower flange 1c, respectively, and is compressed. It is possible to exhibit airtightness. In particular, since the opposing pieces 4c and 4d of the joint fitting 4 have a gradient, it is possible to reliably and easily ensure airtightness without causing wrinkles or breaking of the airtight material 5.

  Next, the flat plate 3 fixed to the end of the beam 2 is brought close to the joint fitting 4 while being parallel to the web 1b of the beam 1, and the flat plate 3 is opposed to the flat plate fixing piece 4b of the joint fitting 4 so as to face the bolt 8a. Is inserted into the bolt hole 3a and fastened to the nut 4g, so that the beam 2 can be joined to the beam 1 at a right angle.

  In the above-mentioned joining structure, the joining member 6 constituting the airtight member 7 is interposed between the web fixing piece 4a of the joining fitting 4 and the web 1b of the beam 1. The thickness of the joining member 6 is as follows. Is as thin as about 1 mm and is made of steel, so that the familiar airtightness is not impaired in the gap between the web fixing piece 4a and the web 1b. Similarly, since the flat plate 3 fixed to the flat plate fixing piece 4b and the end of the beam 2 is fixed in direct contact with the surface, the airtightness is not impaired.

  Further, when the joining metal fitting 4 is formed by welding a groove-shaped member formed by continuously forming the web fixing piece 4a and the opposing pieces 4c, 4d to the flat plate fixing piece 4b, the web fixing piece 4a. And the opposing pieces 4c and 4d are formed in a curved surface. Even when the joining metal fitting 4 has such a shape, since the airtight member 6a having elasticity is provided at the corners of the airtight member 7, the airtightness is secured by the airtight member 6a. Is possible.

  Next, the joint structure according to the second embodiment will be described. FIG. 4 is a view for explaining the joint structure of the second embodiment. Since this embodiment is substantially the same as the first embodiment except for the shape of the joint fitting and the length of the hermetic material, only this will be described with reference to FIG.

  The joining metal fitting 10 has a web fixing piece 10a and a flat plate fixing piece 10b, and opposed pieces 10c and 10d are formed between these pieces. The length of the flat plate fixing piece 10b is formed approximately equal to the dimension between the surface of the upper flange 1a of the beam 1 and the surface of the lower flange 1c. Further, the distance between the web fixing piece 10a and the flat plate fixing piece 10b is such that when the web fixing piece 10a is fixed to the web 1b of the beam 1, the flanges 1e and 1f of the flanges 1a and 1c and the flat plate fixing piece 10b. The dimension is set so as to form a gap 11 sufficient to sandwich and compress the airtight material 5.

  Further, the airtight member 5 adds the dimensions of the flanges 1e and 1f of the flanges 1a and 1c (thicknesses of the flanges 1a and 1c) to the dimensions of the flanges 1a and 1c of the beam 1 from the web 1b. The dimensions are set.

  In the joining structure using the joining fitting 10 and the airtight material 5 formed as described above, when the airtight member 7 is placed along the upper flange 1a, the web 1b, and the lower flange 1c of the beam 1, the end of the airtight material 5 is provided. It will protrude from each flange 1a, 1c. In the process of fixing the web fixing piece 10a of the joint fitting 10 to the web 1b of the beam 1, the hermetic material 5 is sandwiched between the facing pieces 4c, 4d of the joint fitting 4 and the flanges 1a, 1c to be airtight. The air material 5 protruding from the flanges 1a and 1c is sandwiched and compressed between the surface of the flat plate fixing piece 10b on the beam 1 side and the flange edge 1e and 1f, thereby exhibiting airtightness. Is possible.

  Next, by joining the flat plate 3 of the beam 2 to the flat plate fixing piece 10b of the joint fitting 10 fixed to the beam 1, it is possible to join the beam 2 at a right angle to the beam 1 and to ensure airtightness. is there.

  In this embodiment, when the flat plate 3 of the beam 2 is joined to the flat plate fixing piece 10b of the joint fitting 10, the bolt 8a and the nut 8b are used without fixing the nut to the joint fitting 10. It is fixed. As described above, whether the nut 4g is fixed to the joining bracket 4 in advance or whether the nut is not secured to the joining bracket 10 is not limited at all, and is appropriately set according to conditions such as the dimensions of the beams 1 and 2 It is preferable to do.

  In the joining structure of the present invention, it is possible to join the beam 1 at a right angle to the beam 1 by using the joining brackets 4 and 10, and the right angle joining of the beam at the protruding corner portion, the entering corner portion, and the flat portion. This is advantageous when used.

It is an expanded view explaining the junction structure concerning the 1st example. It is a perspective view explaining the state which fixed the joining metal fitting to the beam of the winning side. It is a figure explaining the state which joins the losing side beam to the joining metal fitting fixed to the winning side beam. It is a figure explaining the junction structure of the 2nd example.

Explanation of symbols

1 beam (the beam on the winning side)
2 beams (losing beam)
1a, 2a Upper flange 1b, 2b Web 1c, 2c Lower flange 1d Bolt hole 1e, 1f Flange edge 3 Flat plate 3a Bolt hole 4 Joint metal fitting 4a Web fixed piece 4b Flat plate fixed piece 4c, 4d Opposing piece 4e Bolt hole 4f Hole 4g Nut 4h Reinforcing piece 5 Airtight material 6 Joining member 6a Airtight material 7 Airtight member 8a Bolt 8b Nut 10 Joint metal fitting 10a Web fixing piece 10b Flat plate fixing piece 10c, 10d Opposing piece

Claims (3)

It is a beam joint structure in which the losing beam is joined to the winning beam at a right angle, and a flat plate is fixed to the end of the losing beam, and is fixed in contact with the web surface of the winning beam. Position where the losing side beam should be joined to the winning side beam, with a joining bracket having a web fixing piece and a flat plate fixing piece that is fixed in contact with the flat plate fixed to the end of the losing side beam. The web fixing piece is fixed to the web of the winning beam, and the flat plate fixed to the end of the losing beam is fixed to the flat fixing piece of the joint fitting so that it is parallel to the web of the winning beam. A joint structure of beams. The joining bracket has flange facing pieces facing the upper and lower flanges of the winning beam, and an airtight material is disposed between the upper and lower flanges of the winning beam and each flange facing piece of the joining bracket. 2. The beam joining structure according to claim 1, wherein airtightness is maintained. The flat plate fixing piece of the joint fitting has a flange portion that opposes the upper flange edge and the lower flange edge of the winning beam, and the flange portion wins when the web fixing piece is fixed to the winning beam web. 3. The beam joining structure according to claim 1, wherein the beam is structured so as to be opposed to and close to the upper flange edge and the lower flange edge of the side beam.

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