JPH10114998A - Mounting structure of horizontal member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the eccentric quantity of the installation of a horizontal member to a chief material and a ball joint by projecting a connecting bolt from the chief material and the ball joint for supporting the horizontal member to the chief material and the ball joint for a steel-frame constructed frame and placing a mounting plate, to which the horizontal member is set up, along the connecting bolt and fixing the mounting plate by welding. SOLUTION: A connecting bolt 3, to which a mounting plate 4 is fitted, is installed to a ball joint 1 and levelled, the web 2a of the horizontal member 2 is annexed onto a surface on the connecting bolt side of the mounting plate 4, and fixed by bolt-nut 6. The connecting belt 3 placed on the extension of the center of the ball of the ball joint 1 and the web 2a of the horizontal member 2 are placed on approximately a straight line through the mounting plate 4, and eccentric quantity with the central axis of the horizontal member 2 to the center of the ball of the ball joint 1 cab be made smaller than conventional devices. Accordingly, eccentric bending working to a space truss in a lower section is reduced, and the secondary bending stress of the space truss, etc., can be lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main structure of a steel frame such as a steel truss and a mounting structure of a horizontal member in a steel frame for supporting the horizontal member on a ball joint.

[0002]

2. Description of the Related Art In the finishing work of steel truss structures,
A horizontal member as a roof purlin material is attached to a main member such as a steel truss or a ball joint. Conventionally, as shown in FIG. Is attached to the upper end of the horizontal member 2 made of H-shaped steel.

The mounting bracket 50 has an L-shaped cross section, and a base piece 50a is attached to a fixing surface on the upper part of the ball joint 1 by a bolt 51.
The end of the transverse member 2 is fixed to the upper part of the protruding piece 50b integrally rising from the base piece 50a at the web 2a portion with a bolt / nut 52. Note that the mounting bracket 50 is provided with a rib plate 53 for preventing buckling so as to be located in a gap between the end faces of the horizontal member 2. Also,
A notch 54 is provided at a lower portion of the end of the horizontal member 2,
The horizontal member 2 can be attached to the projecting piece 50b from above or from the side.

[0004]

However, in the case of the conventional mounting structure as described above, the amount of eccentricity between the center of the main member or the ball joint 1 and the center of the horizontal member 2 is large, and it is difficult to allow eccentric bending. There is a problem that the secondary bending stress generated in the lower space truss structure becomes large. Also, the mounting bracket 50
Has a problem that the rib plate 53 is required, the structure is complicated, the number of manufacturing steps is increased, and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to reduce the amount of eccentricity of the mounting of the transverse member to the main member or the ball joint, and to provide a relatively simple structure. An object of the present invention is to provide a mounting structure for a horizontal member, which can have a structure.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a structure for mounting a horizontal member in a steel frame for supporting the horizontal member on a main member or a ball joint of a steel frame, wherein the main member or the ball joint is connected to the main member or the ball joint. The joining bolt is mounted so as to protrude toward the horizontal member, and is fixed by a nut so that the level can be adjusted. The lower end of the attaching plate is attached to the upper shaft of the joining bolt and fixed by welding. Characterized in that the horizontal member is attached to the upper part of the frame.

The mounting plate may be constituted by a single plate as shown in FIG. 1, or as shown in FIG.
A combination of an upper plate and a lower plate may be used. Further, as shown in FIG. 3, an angle material may be used. In this case, a lower piece of the angle material is fixed to a joining bolt, and a horizontal member is attached to the upper piece via a splice plate.

[0008] In the above construction, since the mounting plate to be attached to the cross member is directly fixed to the joining bolt attached to the main member or the ball joint, the web portion of the transverse member is provided above the joining bolt. Can be located
The amount of eccentricity of the central axis of the transverse member with respect to the main member or the ball joint is reduced, and eccentric bending acting on the lower space truss and the like is reduced. The mounting structure is made up of mounting plates and joining bolts, so that the structure is simple and the number of production steps is reduced. Further, the level can be adjusted on site by the joining bolts and nuts.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. This is an example in which a horizontal member is supported by a ball joint of a space truss. FIG. 1 shows a first embodiment of the present invention. FIG. 2 shows a second embodiment of the present invention. FIG. 3 shows a third embodiment of the present invention.

In the first embodiment shown in FIG. 1, a joint bolt 3 is attached to a ball joint 1 so as to protrude toward a transverse member 2, and a flat mounting plate 4 is attached to an upper shaft portion of the joint bolt 3. Affix the lower side by welding 5
The web 2a of the horizontal member 2 is attached to the upper portion of the mounting plate 4 and attached by bolts and nuts 6.

The joint bolt 3 is a general hexagonal bolt, and its lower threaded portion is screwed into the female screw 7 of the ball joint 1 and fixed with a fixing nut 8 so that the level can be adjusted. Further, the lower threaded portion of the joining bolt 3 may be made to penetrate the center of the ball joint 1 and nuts 8 may be provided on the upper and lower sides.

Since the web 2a of the horizontal member 2 is located above the mounting plate 4, the lower flange 2b of the horizontal member 2 and the lower portion of the web 2a are cut out to form a notch 9, and So that the horizontal member 2 can be attached from above or from the side. A hole 1 is provided at the center of the mounting plate 4.
0 is provided so that the bolt head of the joining bolt 3 can be stored. As shown in FIGS. 1C and 1D, the joining bolt 3 may be a full screw bolt or a bolt without a bolt head. In this case, the hole 10 can be omitted.

In the above-described configuration, after the joining bolt 3 with the attaching plate 4 is attached to the ball joint 1 and the level is adjusted, the web 2a of the horizontal member 2 is attached to the joining bolt side surface of the attaching plate 4. And fixed by bolts and nuts 6. The joining bolt 3 located on the extension of the ball center of the ball joint 1 and the web 2a of the cross member 2 are positioned substantially in a straight line via the mounting plate 4, and the cross member with respect to the ball center of the ball joint 1 The amount of eccentricity with respect to the center axis of No. 2 can be reduced as compared with the related art.

In the second embodiment shown in FIG. 2, a mounting plate 4 'is constructed by combining two plates 11, 12 up and down. A slit is formed in the center of the upper plate 11 from the bottom to the middle position, and the lower plate 12 is inserted into the slit, and the upper plate 11 and the lower plate 12 are combined so as to be orthogonal to each other and integrated by welding. The upper plate 11 has the same shape as a commonly used splice plate, and is fixed to the web 2a at the end of the horizontal member 2 with bolts and nuts 6, and the lower portion of the lower plate 12 is welded to the upper shaft portion of the joining bolt 3. Fix at 5.

Also in this case, after the joining bolt 3 with the attaching plate 4 'is attached to the ball joint 1 and the level is adjusted, the web 2a of the horizontal member 2 is attached to the surface of the upper plate 11 on the joining bolt side. Fix with bolts and nuts 6. In the case of such a mounting plate 4 ', not only can the mounting eccentricity be reduced, but also the lower plate 12
There is an advantage that the notch 9 does not need to be provided at the joint end of the horizontal member 2 because it is located in the gap between the ends.

In the third embodiment shown in FIG. 3, the mounting plate 4 "is formed by using an angle member 13. In this case, the flanges 2b of the horizontal member 2 and, if necessary, the webs 2a are connected. Joined by the splice plates 14, 15, 16 and fixed by welding a horizontal upper piece of the angle material 13 to one side of the lower surface of the splice plate 15 of the lower flange. The shaft is fixed by welding 5.

Also in this case, the lower splice plate 1
5. After attaching the joint bolt 3 integrally attached with the angle member 13 to the ball joint 1 and adjusting the level, the lower flange 2b of the horizontal member 2 is placed on the lower splice plate 15.
And fix the splice plates 14, 15 (16) to the horizontal member 2 with bolts and nuts 6.

In the case of such an angle material, not only the mounting eccentric amount can be reduced, but also there is an advantage that the notch 9 is not required. Further, as shown in FIG. Since the material 2 can be passed continuously, and there is no notch 9 (when there is the notch 9, the bending moment is not transmitted mechanically and cannot be handled as a continuous beam), there is an advantage that the material 2 can be handled as a continuous beam. . When the threading member is used as described above, the splice plate can be omitted.

Although the above description has been given of a ball joint such as a space truss, it goes without saying that the present invention can be similarly applied to a main member of a steel frame structure.

[0020]

According to the present invention, there is provided a mounting structure for a transverse member, wherein a connecting bolt is projected from the main member or the ball joint to support the transverse member on the main member or the ball joint of the steel frame. Since the mounting plate to which is mounted is fixed by welding along the joining bolt, the following effects are obtained.

(1) The amount of eccentricity of the mounting of the horizontal member to the main member and the ball joint can be made smaller than before, and the eccentric bending acting on the lower space truss and the like can be reduced.
Next bending stress can be reduced.

(2) Since the mounting structure of the horizontal member can be constituted by the mounting plate and the connecting bolts, the structure can be simplified, and the mounting plate and the connecting bolts need only be mounted by welding. Production man-hours can also be reduced, and costs can be significantly reduced as compared with the conventional case.

(3) The level of the horizontal member can be easily adjusted on site by using the joining bolts and nuts.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a mounting structure of a horizontal frame member in a steel frame structure according to the present invention, wherein (a) is a front view, (b) is a cross-sectional view, and (c) and (d) are joined. It is a cross-sectional view which shows the modification of a bolt.

FIGS. 2A and 2B are a second embodiment of a mounting structure of a horizontal frame member in a steel frame structure according to the present invention, wherein FIG. 2A is a front view and FIG.

3A and 3B show a third embodiment of a mounting structure of a horizontal member in a steel frame structure according to the present invention, wherein FIG. 3A is a front view, FIG. 3B is a horizontal sectional view, and FIG. It is a schematic front view at the time of using a material.

4A and 4B show a mounting structure of a horizontal frame member in a conventional steel frame structure, wherein FIG. 4A is a front view and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ball joint 2 ... Horizontal material 3 ... Joint bolt 4 ... Mounting plate 5 ... Welding 6 ... Bolt and nut 7 ... Female screw 8 ... Nut 9 ... Notch 10 ... Hole 11 ... Upper plate 12 ... Lower plate 13 ... Angle material 14, 15, 16 ... Splice plate

Claims (1)

[Claims] 1. A mounting structure for a transverse member in a steel frame for supporting a transverse member to a main member or a ball joint of a steel frame, wherein a joining bolt is attached to the main member or the ball joint to the transverse member. At the same time, it is fixed so that the level can be adjusted with a nut, and the lower part of the mounting plate is fixed to the upper shaft of the joining bolt by welding, and the horizontal member is mounted on the upper part of the mounting plate. A mounting structure for a horizontal member characterized by being mounted.