JPH06200625A - Frame method of arch truss construction - Google Patents

Abstract

PURPOSE:To make unnecessary a large-sized heavy machine, to make it possible to safely frame efficiently and to save energy. CONSTITUTION:A plurality of divided trusses 2A-2D dividing an arch truss 1 in a longitudinal direction are assembled at a field in a state to connect adjacent divided trusses to each other in a vertically turnable manner. Truss tails 1a of the field assembled arch truss 1 are pulled to the insides of them by a winch 10, so that the arch truss 1 can be erected in a completed shape. After the erection, turnable connections 3 among the divided trusses 2A-2D are connected with bolts in an unturnable state. The connection of the turnable connections 3 is made by making use of a high-place working car or a rolling tower, etc. The truss tails la are arranged on truss erection guide rails 7, and resistance in the case of pulling-in can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of framing a tent structure and various other arch truss type structures.

[0002]

2. Description of the Related Art In order to form a large space without a center pillar, an arch type structure uses a temporary support for the frame, and also erections with a heavy machine such as a crane. Is generally taken. FIG. 6 shows an example of a conventional construction method. First, as shown in FIG. 3A, a divided truss 51 having a half length of the arch truss is assembled. This is erected by a crane 52 as shown in FIG. 3B and temporarily fixed on a truss receiving support 53 which has been constructed in advance. After this, in the same manner as described above, the remaining half split truss 51 is erected as shown in FIG.
Join a with bolts or the like. After assembling the arch type truss 50 in this manner, a roof material 54 such as a tent curtain is attached, and a ceiling lighting device (not shown) is attached. During these operations, a safety net 56 for preventing the worker 55 from falling is stretched under the arch type truss 50.

[0003]

However, according to the above frame method, a large heavy machine such as the crane 52 is required, and the location of the crane 52 may not be obtained in a narrow urban area. In addition, a large, large truss support support 53 is required, and it takes time to assemble, transport materials and dismantle them. Temporarily fixing the upper end 51a of the split truss 51 to the support 53, or the upper end 5 of both split trusses 51.
The work of joining 1a to each other is also a division truss 51
Since it will be a high work while supporting the crane 52 with the crane 52,
Workability is poor and time-consuming. Furthermore, since the roof material 54 and the lighting fixtures are attached after the arch type truss 50 is assembled, it is necessary to temporarily install the net 56 and the truss receiving support 53 for ensuring safety. Moreover, the amount of work in high places is large, which is dangerous work.

An object of the present invention is to provide a method for framing an arch truss type structure which can safely and efficiently construct a structure without requiring a large heavy machine and save labor.

[0005]

The frame method of the present invention comprises:
This is a method of framing in the following process. First, a plurality of divided trusses obtained by dividing the arch truss in the longitudinal direction are grounded so that adjacent divided trusses are vertically rotatably connected to each other. The arch truss is erected in a completed shape by pulling in the truss bottom of the arch truss that is grounded inward. After this construction, the rotatable connecting portions between the divided trusses are joined in a non-rotatable state.

[0006]

According to this frame method, since the divided trusses are rotatably connected to each other and the truss butt is pulled inward to erection, the frame can be constructed without the need for a large heavy machine such as a crane. Also, a large temporary support is not required. After the construction, the joints of the divided trusses can be joined by bolting etc. using a work platform for high places or a rolling tower. The joining in this case is a joining of the members that are rotatably connected in advance, and thus can be easily performed. Therefore, it leads to labor saving. The aerial work vehicle and the like do not bear the weight of the divided trusses, and thus may be small in size.
It is safe to install roofing materials such as tent curtains and ceiling-mounted equipment such as lighting fixtures at the stage of subassembly and work at a low position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (A), the arch truss 1 is divided into a plurality of divided trusses 2A-
2D is grounded in a state in which the adjacent divided trusses 2A to 2D are rotatably connected by the connecting portion 3. The number of truss divisions shall be an appropriate number according to the truss length and other factors. In the illustrated example, it is divided into four. Two split trusses on the center side
B and 2C are assembled by mounting the connecting portions 3 on the truss receiving supports 4 to 6 at a height such that the worker A can stand and work under them. The truss butts 1a on both sides are mounted on a guide rail 7 laid on the ground so as to be movable in and out via rollers 8. In addition, each split truss 2A ~
2D itself is assembled at a factory, etc., and split truss 2A is used on site.
2D may be arranged on the supports 4 to 6 and the connecting portion 3 may be connected. Also, at the stage of this construction,
The tent curtain 9 and lighting equipment (not shown) are attached to the arch truss 1 in advance. A safety net 12 is stretched on the lower surfaces of the split trusses 2B and 2C.

After this, the truss butt 1a on both sides is connected to the winch 10 placed on the ground at the center of the truss by the wire ropes 11, and the truss butt 1a is erected to the center side on the guide rail 7. By retracting, the arch truss 1 is erected in the final shape as shown in FIG. After this construction, the rotatable connecting portion 3 between the divided trusses 2A to 2D is bolted to the non-rotatable state. This bolt joining work is performed by an aerial work vehicle or rolling tower (not shown).
Etc. Further, each truss butt 1a is joined to a foundation anchor bolt or the like that is pre-cast in the ground as described later. The truss receiving supports 4 to 6 are removed after they have been built.

2 to 4 show specific structural examples of the arch truss 1, the truss-raising guide rails 7 and the like. Each of the divided trusses 2A to 2D of the arch type truss 1 has two upper chord members 13 and one lower chord member 14 made of a round pipe arranged in a triangular cross section, and a lattice member 15 between each chord member 13 and 14. It was joined with. Each split truss 2A-2D
As shown in FIG. 4, the plate-like or frame-like divided truss end members 16 are joined to both ends of the chord members 13 and 14, and the extension positions of the chord members 13 and 14 of the divided truss end members 16 are joined. To
The joining pieces 17 and 18 are projected by welding or the like. Split truss 2A
The pivotable connection during grounding between ~ 2D is such that the joining pieces 17 of the upper chord members 13 of the corresponding split trusses are overlapped with each other, and bolts (not shown) are provided in the joining holes 19 provided in both joining pieces 17. It is performed by inserting it and temporarily tightening it. In the truss butt 1a, instead of the split truss end member 16, the base plate 2
0 is joined across the chord members 13 and 14.

The roller 8 has split trusses 2A at both ends,
It is attached to a bracket 21 welded to the lower chord member 14 with a truss butt 1a in 2D. The bracket 21 also serves as a hook for the wire rope 11, and has a rope coupling hole 21a.

As shown in FIGS. 2 and 3, the truss erection guide rail 7 is composed of an upward groove type member on which the roller 8 is movably mounted, and the truss installation base is provided on the ground. 22 and rail support concrete board 2
It is placed on the upper surface over three. The truss erection guide rail 7 is divided into two in the vicinity of the foundation 22, and both are connected by a bolt 31 via a connection plate 30 welded to one rail 7. A roller stop stopper 25 is provided at the outer end of the truss erection guide rail 7, and is fixed to the concrete board 23 by a fastener 24 such as an anchor bolt or a hole-in anchor. If the arch truss is small (span 10M or less), the fastener 2
4 may be omitted. The base 22 has a long nut 2 at the upper end.
An anchor bolt 27 with a nut having 6 is embedded, and the upper surface of the top mortar 28 is erected by a truss so that the height is equal to or higher than the upper edge of the guide rail 7. Instead of the top mortar 28, a concrete slab or a metal plate may be provided.
The base plate 20 of the truss butt 1a is provided with fixing holes 29 that are aligned with the anchor bolts 27.

At the time of erection, as shown in FIG. 4, the truss butt 1a is placed near the outer end of the guide rail 7 after the truss has been erected. When it reaches the position, attach the base plate 20 to the bolt 3
1 (FIG. 2), and fix it to the long nut 26 of the anchor bolt 27. After that, the outer truss erection guide rail 7 is removed by removing the bolt 31.

According to this frame method, each divided truss 2A is
2D are rotatably connected to each other, and the truss butt 1a is pulled up inward by the winch 10 to erection, so that the frame can be constructed without requiring a large heavy machine such as a crane. In addition, a large-scale temporary support as in the past is not necessary, and only the truss receiving supports 4 to 6 which are about the height of a person are sufficient. The joint portions 3 of the divided trusses 2A to 2D after being erected can be joined by bolting using an aerial work vehicle or a rolling tower. The joining in this case is a joining of the members that are rotatably connected in advance, and thus can be easily performed. Therefore, it leads to labor saving. The aerial work vehicle or the like does not bear the weight of the divided trusses 2A to 2D, and thus can be small in size.

Further, as described above, the roof material such as the tent curtain 9 and the ceiling-mounted equipment such as the lighting equipment can be mounted at the ground assembly stage, and the work can be performed at a low position, which is safe. In addition, when the arch truss 1 is for temporary installation, it can be disassembled in the reverse order and each member can be repeatedly used, which is economical.

FIG. 5 shows another embodiment. This example is an example in which two arch trusses 1 and 1 are provided so as to cross each other in a cross shape. In this case, a cross-shaped connecting member 32 is used at the top of the truss, and the divided trusses 33 gathering at the top are rotatably connected by bolts 34. The two arch type trusses 1 and 1 are grounded in the same manner as described above, and the opposing truss butts 1a are pulled inward by the wire rope 11 and the winch 10. However, in this case, the two arch trusses 1 and 1 are pulled in at the same time. In this example, 2
This is an example of a case in which a rectangular structure is framed by the arch type truss 1 of the book, but a hexagonal structure, an octagonal structure, a hexagonal structure, or the like can be performed in the same manner as the example of FIG.

In each of the above-mentioned embodiments, the case where the arch type truss 1 is installed on the independent foundation 22 has been described. For example, a truss is erected on a solid foundation, a guide rail is fixed with anchor bolts, and the truss butt is mounted on the rail. May be fixed. Further, in each of the above-described embodiments, the truss butt 1a on both sides is pulled inward, but one truss butt 1a may be fixed in position, and only the other truss butt 1a may be pulled inward.

[0017]

According to the frame truss method of the arch truss type structure of the present invention, since each divided truss is rotatably coupled and the truss butt is pulled inward, the construction is carried out. No need for high truss support. In addition, since the divided trusses are rotatably connected at the time of assembly, after the construction, it is only necessary to connect the connected portions with bolts or the like, and the connecting work can be performed easily. For these reasons, work in high places is small, work can be performed safely, and labor is saved. Furthermore, a truss-attached structure such as a tent curtain can be attached during the grounding, which can further reduce the work at height and improve the safety and workability.

[Brief description of drawings]

FIG. 1 is an explanatory view of a frame process showing an embodiment of the present invention.

FIG. 2 is a cutaway side view of a peripheral portion of the truss erection guide rail.

FIG. 3 is a cutaway plan view of the same portion.

FIG. 4 is a reduced cutaway side view showing an assembled state of the same portion.

FIG. 5 is a schematic plan view of another embodiment and a partially enlarged plan view thereof.

FIG. 6 is an explanatory view of a conventional frame method.

[Explanation of symbols]

1 ... Arch type truss, 1a ... Truss butt, 2A-2D ... Split truss, 3 ... Connection part, 4-6 ... Truss receiving support,
7 ... Truss erection guide rail, 8 ... Roller, 9 ... Tent curtain, 10 ... Winch, 11 ... Wire rope

Claims (1)

[Claims] 1. A process of grounding a plurality of split trusses obtained by partitioning an arch truss in the longitudinal direction into a state in which adjacent split trusses are vertically rotatably connected to each other, and this ground arched truss It includes a process of pulling the truss butt of the truss inward to erected the arch type truss into a completed shape, and a process of rotatably connecting the rotatable joints between the divided trusses after the erection. Frame truss structure method.