JP2001323557A - Grid beam structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a grid-shaped purlin or the like easily, economically in a short period of time. SOLUTION: A standing plate 2 directed in plural directions is installed to a joint plate 1 of a beam member, each end portion of the beam member is secured with a screw to the standing direction in the plural directions, the standing plate is made of an angle member, the corners of two leaves of the angle members are butted each other to a cross thereby each beam member end portion is secured to the standing plate 2 in 4 directions with screws thereby forming the grid beam structure. When securing the end portion of the beam member with a screw, the beam member is deviated in angle from the beam member jointing plate and fixed to the standing plate and a horizontal cross section T-shaped bracket 5 is provided to the end portion of the beam member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lattice beam structure capable of easily and economically forming a lattice-shaped purlin or the like, which tends to be particularly large in recent years, in a short period of time.

[0002]

2. Description of the Related Art Various structures have been implemented for lattice beams used for frames of various structures. In order to form the beam components in a lattice shape, the structure is assembled by fixing the joining plates to both sides of the collective portion of the beam components by welding. However, this method is good as a structure to obtain strength, but in order to assemble the grid beams planarly, welding must be performed not only from the upper side but also from the lower side, making welding work extremely difficult. Efficiency also has a drawback.

[0003] Therefore, such difficulties are described in Japanese Patent Publication No. 60-43833
Has developed a method of manufacturing a lattice beam that allows welding only from the top side. The manufacturing method of the lattice beam is
Attach the plate on which the pins are erected, place the joining plate on the portion of the plate surrounded by the pins, fit the ends of the beam components between the pins, and lay the joining plate on the joining plate. Weld the components, place a joining plate on the part surrounded by the pins on the beam component, weld this joining plate and the beam component, form a grid beam, then reverse the grid beam and join both It is characterized by welding the plate and beam components.

[0004]

The method of manufacturing a lattice beam proposed in Japanese Patent Publication No. 60-43833 has improved work efficiency and shortened the construction period by eliminating welding work from the lower surface side. It is revolutionary. However, since welding work is required, there is a limit to the improvement of work efficiency, and in the case of round roofs, it is necessary to deviate the angle when welding the joining plate and beam components, and to accurately curve the whole. Construction was difficult and required skill. The present invention has studied the formation of such a lattice-shaped purlin which tends to be particularly large in size in a short time, easily and economically.

[0005]

As a result of studying the above-mentioned problems, as a result, a beam member joining plate is provided with upright plates facing in a plurality of directions, and the beam members are screwed to the upright plates in the plurality of directions, respectively. Beam structure was adopted. The upright plate is an angle material, and preferably has a lattice beam structure in which the ends of the beam members are screwed to four upright plates formed by crossing the corners of the two angle materials and forming a cross. In addition, the erecting plate may be individually attached in each direction.

In such a structure, when screwing the end portion of the beam member, the beam member is deflected relative to the beam member joining plate and fixed to the upright plate in order to conform to the curvature of the circular roof or the like. At this time, if a horizontal section T-shaped bracket is provided at the end of the beam member, screwing is easy. It is also possible to squeeze the end of the beam member, provide a screw hole in that portion, and fix it to the upright plate with screws.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. FIG. 1 is a plan view of a main part of a lattice beam structure of the present invention, and FIG. 2 is a side view of the same part. FIG. 3 is an enlarged view of a portion A in FIG. FIG. 4 is an enlarged view of a portion B in FIG.

As is apparent from these figures, the lattice beam structure of the present invention is provided with upright plates 2 oriented in four directions on the beam member joining plate 1. The beam member joining plate 1 is formed in an octagon in this example. The upright plate 2 welded to the beam member joining plate 1 is an angle material, and the corner portions of the two angle materials are joined to form a cross, and the beam member 3 can be connected from four directions. Screw holes 4 are provided in the upright plates 2 in four directions.

The end of the beam member 3 has a bracket 5 having a T-shaped horizontal section. The bracket 5 is also provided with a screw hole 6 so that the bracket 5 can be stopped by the upright plate 2 and the bolt screw 7. The cover plate 8 is preferably welded to the beam member joining plate 1 for hiding the bracket 5, the upright plate 2, the bolt screw 7, and the like (see FIG. 4) for reinforcement.

When the upright plate 2 and the end of the beam member 3 are screwed together with the curved roof as shown in FIG. 5, the beam member 3 is deflected with respect to the beam member joining plate 1. Then, it can be fixed to the upright plate 2. For this purpose, the screw hole 4 provided in the upright plate 2 and the screw hole 6 provided in the bracket 5 may have a large diameter with a margin larger than the diameter of the bolt screw 7 or may be deviated by forming a group hole. it can.

FIG. 5 is a diagram comparing a conventional method (right half) in which a purlin method is carried out with a beam and a beam, and a case of a lattice beam structure (left half) of the present invention. In the conventional method (right half), three beams 10 are used, whereas in the present invention, two beams 10 are used. In addition, the conventional construction method requires a sub-joint 11 and a bracing 12. in addition,
Truss 13 is also reinforced. Relative to the total weight is also of mild and if 15~17Kg / cm ² on the left side of the present invention, the right of the conventional method is 20 Kg / cm ² and about 20% heavier. The lattice beam structure of the present invention is completed by assembling a predetermined unit area on the ground and lifting the unit area to the roof for each unit area, and does not require any welding work.

[0102]

According to the present invention, since a predetermined unit area of the lattice beam structure is assembled on the ground and completed, and the unit is lifted to the roof and assembled by screws, there is no danger because no welding work is involved. No, work efficiency is good. In addition, a large latticed purlin or the like can be formed easily and economically in a short period of time without relying on skilled personnel. The completed purlin is lightweight, high-strength and resistant to strong winds. In addition, roof work such as roofing work is easy.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a lattice beam structure according to the present invention.

FIG. 2 is a side view of the same part.

FIG. 3 is an enlarged view of a portion A in FIG. 1;

FIG. 4 is an enlarged view of a portion B in FIG. 2;

Fig. 5: Conventional construction method using the main purlin method with beams and braces (right half)
And the case of the lattice beam structure of the present invention (left half)
(a) is a front view, (b) is a plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam joining plate 2 Standing plate 3 Beam member 4 Screw hole 5 T-shaped bracket with horizontal cross section 6 Screw hole 7 Bolt screw 8 Cover plate

Claims (4)

[Claims] 1. A lattice beam structure in which an upright plate facing a plurality of directions is provided on a beam member joining plate, and ends of the beam members are screwed to the upright plates in the plurality of directions, respectively. 2. The upright plate is an angle member, and the corners of the two angle members are joined to form a cross.
2. The lattice beam structure according to claim 1, wherein the beam member ends are screwed to the upright plates in the directions. 3. The lattice beam structure according to claim 1, wherein, when screwing the beam member end, the beam member is deflected relative to the beam member joining plate and fixed to the upright plate. 4. The lattice beam structure according to claim 1, further comprising a T-shaped bracket having a horizontal cross section at an end of the beam member.