JP2005337007A - Joining method for wood frame and fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining method by a wood screw and a simple joining fitting to join wood members of a single layer lattice arch shell structure roof using wood members. <P>SOLUTION: The fitting and the wood member are connected by a wood screw to construct a single layer lattice arch shell. The fitting used in a joining part has two kinds of a fulcrum fitting 4 and an insertion fitting 2. The fulcrum fitting is constituted by welding and joining half-splitted pieces of an iron pipe with the center of an iron plate and overlapping two pieces. The overlapped iron plate has an angle suitable for a curved face of the roof. The insertion fitting 2 is constituted by drilling a wood screw hole in the iron plate and providing a cut-out part so as to insert a pipe of the fulcrum fitting. The insertion fitting is nipped from both sides of the pipe of the fulcrum fitting. The insertion fitting is at the center of frame wood 1 to prevent occurrence of a clearance in a screw 5 and the iron plate. Wood of one frame is divided into two pieces. First, wood on one side is applied to the iron plate, and a prepared hole is drilled in the wood by a drill from a side of the iron plate. Next, another wood is applied to tighten in the prepared hole from the outside of the wood by a screw actually. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a structure of a roof portion of a building.

The arch made of wood frame is generally made of large cross-section laminated timber.
The single-layer lattice structure that realized the arch was found in steel or prestressed concrete but not wooden.

The joint fittings that make up the single-layer lattice arch or dome structure only required special bending or casting. In addition, since the number of supporting points is large, if the accuracy of each part is not high, a large error occurs as a whole. Therefore, it was necessary to produce a joint with high accuracy and to perform assembly work with high accuracy. This is expensive.
Since the building corresponds to various site shapes and uses, the shape of the roof is various. In order to respond to such a request with a metal fitting with no degree of freedom, it is necessary to manufacture a metal fitting with a different shape.
It is common to use bolts to join the brackets and frames of the joints, but when the frame is made of wood, it solves the following two points: the indentation of the bolts into the wood and the gap between the bolts and the wood. A special method is used.
The division process is based on the text and corresponds to the reason for refusal at the time of division. That is, the bolt is inserted into the bolt through hole of the hardware and the laminated material and tightened, and the bolt through hole is not consistent. Further, the disclosure of the reinforcing structure is limited. Therefore, the object of the present application cannot be achieved.

It is possible to reduce the cost by simplifying the metal fittings of the joints as much as possible so that they can be easily manufactured at a general steel processing factory.
The joint metal fittings can be used to accommodate differences in the length and angle of frames such as wood. Differences in the parts of the joints can be all handled with one kind of joint metal because the metal parts have a degree of freedom.
Simple assembly work can be achieved by using wood screws to join wood and metal fittings.

By realizing the arch shell structure with a low-cost construction method, it is possible to create small and medium-sized buildings with large spaces.
Since the joint has a degree of freedom, it is possible to deal with roofs of various shapes with the same hardware, and there is a possibility of widespread use because no special assembly tool is required.
The arch shell structure made of wood can create a large space with warmth.
In a small building such as a house, a large amount of material is used to secure a large space. Large materials are heavy, and when collapsed due to an earthquake or the like, the collapse time is short, and there is a risk of greater damage when collapsed. A light arch structure with many fulcrums has a small seismic force that is input to the building during an earthquake, and the seismic force is easily distributed throughout. When collapsing beyond the limit, it collapses after a large deformation, so it takes a long time to collapse and it is easy to protect the safety of the resident's life.
Because it has a single-layer lattice structure, it is excellent in preventing dust, bird's nest, and spider's web.

There are two types of metal fittings at the joint, a fulcrum metal fitting and an insertion metal plate 2.
As for the fulcrum metal fittings, two fulcrum metal fitting pipes 4 welded and joined to the center of the fulcrum metal plate 3 are stacked.
The stacked fulcrum metal plates 3 have an angle that matches the arch of the roof. The angle needs to be highly accurate. High accuracy can be easily realized by welding a round steel bar 8 between the two fulcrum bracket iron plates 3 stacked.
The insert metal plate 2 is formed by drilling a wood screw hole 6 in the iron plate. The iron plate is notched so that the fulcrum metal fitting pipe 4 is inserted. The insert metal plate 2 is sandwiched from both sides of the fulcrum metal pipe 4. The sandwiched fitting metal plate 2 is fixed to the wood so that the fulcrum metal pipe 4 is also fixed. The insertion metal plate 2 needs to be in the center of the wood frame 1.
It is necessary to fix the insertion metal plate 2 between the wood frames 1 accurately without a gap.
However, it is difficult for an ordinary electric screwdriver to accurately drive a screw into a screw hole formed in an iron plate.
The problem was solved by dividing the wood of one frame into two pieces. First, one wood frame 1 is applied to the insertion metal plate 2, and a pilot hole is drilled in the wood frame 1 from the insertion metal plate 2 side. Next, another piece of the wood frame 1 is applied, and this time, the wood frame 1 is finally tightened with a wood screw 5 from the outside of the wood frame 1 to the prepared hole. By doing so, the gap between the wood screw 5 and the insertion metal plate 2 becomes zero.

FIG. 1 is a plan view of a home roof realized by the present invention, FIG. 2 is a diagram showing a state in which the metal fitting and the wood frame are joined, FIG. 3 is a plan view of the fulcrum metal fitting, and FIG. Figure,
FIG. 5 is a plan view of the insertion fitting.
The detailed description has been given in the embodiment.

It is a sketch of the roof of an Example. It is a figure of the state where the metal fitting and the wood frame were joined. It is a top view of a fulcrum metal fitting. It is sectional drawing of a fulcrum metal fitting. It is a top view of an insertion metal fitting.

Explanation of symbols

1 Wood frame 2 Insert metal plate 3 Support metal plate 4 Support metal pipe (half-divided iron pipe)
5 Wood screw 6 Wood screw hole 7 Temporary fixing screw hole 8 Round steel

Claims (1)

  Divide the wood that will be one frame into two pieces, place one of the two pieces of wood on the iron plate with a wood screw hole, open a lower hole in the wood from the side of the iron plate, The other wood of the two pieces of wood is applied to the iron plate, and the iron plate between the wood and the wood divided into two pieces with wood screws from the outside of the wood with the prepared hole to the lower hole is finally tightened By doing so, the wood screw and the iron plate are joined without a gap, and the method of joining the metal and the metal fitting of the joint portion using the wood screw.

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