JP3944295B2 - Shaft assembly method using box metal fittings for construction - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a box-shaped metal fitting for building that joins and fixes an end of a base or a beam and a column when a base or a beam is mounted on a column or the like in a wooden building.
[0002]
[Prior art]
As a method of mounting a base or a beam on a column, in the old days, a tenon was formed so as to protrude from the end of the beam, and the tenon was fitted into a tenon bored on the column side. In recent times, mounting brackets have been used due to the inconvenience of forming mortises and mortises in the base or beams and bases and the difficulty of mounting work on site.
[0003]
As such a mounting bracket, there is a mortise-equipped beam receiving bracket 1 disclosed in Utility Model Registration Publication No. 2523520 as shown in FIG. This tenon with a tenon for building 1 has a tenon-like protrusion 3 integrally formed on the outer surface of a back plate 2 of a box type metal fitting, and a nail hole is formed in each of the back plate 2, the left and right sleeve pieces 4, and the metal-side side plate 5. Is forming.
[0004]
[Problems to be solved by the invention]
When using the above-mentioned beam receiving bracket, first, the tenon-like protrusion 3 is fitted into the mortise of the column, and the bracket is fixed to the column by a nail screw from the nail hole, and then the beam is inserted into the bracket. The beam is fixed to the bracket by nail screws from the remaining nail holes, but now it is common to replace the nail with bolts inserted into the bolt holes formed in the beam bracket and pillar respectively and fasten them. It is.
[0005]
However, the steps and other setups when using the above-mentioned beam brackets for wooden construction are as follows: (1) Combine wood, hardware and bolts at the factory, and then carry them to the site. (2) A method in which each piece of wood, hardware, and bolt is separately carried from the factory to the site, where each piece of wood and parts are prepared and the work of the shaft is performed. There is.
[0006]
According to the method (1), on-site work is streamlined and speeded up, but on the other hand, the volume of packaging during transportation increases and an increase in transportation cost is inevitable. However, although the method (2) simplifies the packing method and reduces the transportation cost, the arrangement and arrangement of parts at the site is complicated, so the work time becomes long and the cost increases in this aspect. There are problems, and each method has one advantage, one disadvantage.
[0007]
In view of the above situation, the object of the present invention is to provide an average when attaching a mounting bracket to a base or a beam to increase the productivity of work on site while avoiding an increase in transportation cost. It is an object of the present invention to provide an architectural box-type metal fitting that can be easily fastened to a pillar in a short time and guarantee the strength of the frame structure even by a construction worker with a conventional technique.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a hole forming step of forming an insertion hole and a mortise in a wood such as a base or a pillar, a bolt insertion step of inserting a bolt below the mortise of the wood, A mortise-like protrusion having a bolt hole formed in the head, and a keyhole-like bolt hole having a large-diameter portion and a small-diameter portion formed at a predetermined distance below the tenon-like protrusion. said abutting step of abutting is brought closer to the box-type bracket to said timber so as to insert the bolt head inserted into the timber to the large diameter portion of the box-shaped bracket, said bolt having a rectangular back plate a placing step of placing the the box-shaped fitting on the bolts by lowering the box-fitting so as to guide the small-diameter portion, tenon-like collision portion insertion step of inserting the tenon-like collision portion to said mortise When the Zoshime step of performing further tightening increased by screwing the wood the bolt, the insertion A timber standing on the step of erecting the timber by inserting the hollow hardware which insertion hole is formed for inserting the bolts into the bolt of the mortise-like collision portion after insertion of the tenon-like collision portion to the mortise The present invention provides a method for assembling a shaft using a box-type metal fitting for building, characterized by comprising: a bolt and a tightening process for inserting a bolt into the bolt insertion hole of the hollow hardware and further tightening the box-type metal fitting to wood. is there.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a frame structure around a foundation in a wooden building. A is a wooden building cloth foundation formed in a cross, and B and B ′ perpendicular to this are installed on the cloth foundation. A base C is a pillar erected on the base B. A box metal fitting D is used for connecting the base B and the base B ′, and a hollow metal piece E is used for connecting the base B and the column C.
[0011]
The base B is laid on the cloth foundation A so as to be orthogonal to the base B ′ at the site, but since the box metal fitting D is scheduled to be attached to the base B, the base B The holes and insertion holes corresponding to the inside of the inside are previously formed at a plurality of locations, and details will be described later.
[0012]
As shown in FIG. 2, the box-shaped bracket D includes a substantially rectangular back plate 1 having tenon-like projections 11 formed on the center line of the surface, and a pair of side plates 2 from both side edges of the back plate 1. Is extended in parallel with the back surface direction and formed in a substantially box shape as a whole. Further, a bolt hole 11 ′ is formed in the center of the head of the tenon-like protrusion 11.
[0013]
A keyhole-shaped bolt hole 12 comprising a large diameter portion 12a and a small diameter portion 12b extending from the large diameter portion 12a toward the tenon-like projection 11 is formed below the tenon-like projection 11 through a predetermined position. . And the said small diameter part 12b is carrying out the shape of the slot connected toward the large diameter part 12a.
[0014]
On the other hand, each side plate 2 extending from the back plate 1 is provided with a pin guide groove 21 and bolt holes 22 and 23, and faces the bolt guide groove 21 and bolt holes 22 and 23 of the other side plate. Yes.
[0015]
As shown in FIG. 3, a mortise hole 11a and a bolt hole 12a are preliminarily drilled on the side surface of the base B at predetermined positions corresponding to the tenon-like projections 11 and the keyhole-like bolt holes 12 of the box-shaped bracket. Are aligned. Further, a bolt insertion hole 11b communicating with the mortise 11a is formed at the back of the mortise 11a. On the other hand, a bolt T is screwed into the bolt hole 12a in advance, and the upper end portion including the head portion protrudes outward in the lateral direction as shown in FIG.
[0016]
Next, the hollow hardware E embedded in the pillar C and the base D will be described. Insertion holes Ba and Ca are formed in the center part of the base B and the axial center part of the pillar C, respectively, and when the pillar C is assembled to the base B, the communicating positions are aligned with each other. The hollow hardware E is fitted.
[0017]
As shown in FIG. 4, the hollow metal piece E is formed of a metal mold having a circular cross section in which a pair of elongated saddle-shaped halves E ′ are molded with a mold, the openings of the two are combined and fixed by a locking portion Ea. It is a member. FIG. 5 shows a state in which the hollow metal object is disassembled into the bowl-shaped half E ′, and each is formed into a base or a pillar when combined because the whole is slender and both ends have a curved shape. When inserting into the insertion hole, it is possible to work smoothly.
[0018]
In the vicinity of both curved ends, a pin insertion hole Eb and a bolt insertion hole Ec are formed so as to face the counterpart half body E ′ when combined.
[0019]
The procedure of the foundation and pillar shaft assembly will be described below using the state of the foundations B and B 'and the pillar C as well as the box-shaped bracket D and the hollow hardware E described above. First, the back plate 1 of the box-shaped metal fitting D is brought close to and brought into contact with a predetermined position where the bolt T is inserted into the mortise 11a and the bolt hole 12a on the side surface of the base B.
[0020]
At that time, the box metal fitting is lowered so that the bolt T screwed into the base B is inserted into the large diameter portion 12a of the keyhole bolt hole 12 of the box metal fitting D and the bolt T is guided to the small diameter portion. Let Then, the box-shaped metal fitting is placed on the bolt T by bringing the bolt T into contact with the uppermost portion of the small-diameter portion 12b having a slot shape. At the same time, the mortise-like protrusion 11 is inserted into the mortise 11a. At this position, the bolt T is tightened to fix the box-type metal fitting to the base B.
[0021]
Next, the column C is lowered so that the protruding portion is inserted into the insertion hole Ca with the half of the hollow metal piece E inserted into the insertion hole Ba formed in the base B protruding upward.
[0022]
Then, the pin S is inserted through the pin insertion hole Eb of the hollow metal piece E through the pin hole Pa formed with the drift pin P as a column, and the bolt S is inserted through the bolt hole 11 ′ of the tenon-like protrusion of the box-type metal fitting. After further inserting into the bolt hole Ec of the hollow metal piece E from the bolt insertion hole 11b, the nut is fastened and fixed from the inside of the box-shaped metal fitting D with a nut.
[0023]
As described above, the base B to the base B'fixing Then together using a box-shaped fitting D, utilizing hollow hardware E in order to vertically fix the pillar C on the base B, and, a box-shaped fitting D Bolts are inserted and fixed in bolt holes 11 ′ formed in the tenon- like protrusions 11 and bolt holes Ec formed in the hollow metal parts, so that not only on-site work is easy, but also the foundations and pillars are firmly attached. Is done.
[0024]
Further, the box-shaped metal fitting D and the hollow metal fitting have been described in the assembling of the base B and the base B ′ and the assembling of the base B and the column C. However, in the present invention, the present invention is not limited to this. It is also effective for assembling beams and columns.
[0025]
【The invention's effect】
As described above, in the shaft assembling method using the building box metal fittings of the present invention as described above, while forming a mortise in advance in wood such as a base of a wooden building or a pillar and screwing a bolt under it, In addition to the tenon-like protrusions on the back plate, a keyhole-shaped bolt hole is formed, so that the bolts screwed into the base are guided to the small diameter part of the keyhole-shaped bolt hole of the box-type metal fitting, and the box-type metal fitting is fixed, so the work is easy Can be executed in a short time. As a result, the volume required for packing during transportation is reduced by 30%, and the packing cost is reduced. In addition, the number of man-hours is reduced, the construction period is shortened, and the cost can be greatly reduced.
[0026]
The front Symbol central bolt holes are formed in the head portion of the tenon-like protrusion, so subjected to additional tightening action through the bolt hole, the axial set structure of the whole timber, such as a box-type bracket and the base Become stronger.
[Brief description of the drawings]
FIG. 1 is a perspective view in which a column and a base are combined using a box-shaped metal fitting or the like of the present invention.
FIG. 2 is a perspective view of a building box metal fitting used in FIG. 1;
FIG. 3 is a cross-sectional view showing insertion holes formed in a pillar and a base.
FIG. 4 is a perspective view of bolts for fixing to the box-shaped metal fitting of the present invention.
FIG. 5 is an exploded perspective view of a hollow metal object.
FIG. 6 is a perspective view of a conventional box-type metal fitting.
[Explanation of symbols]
B Base C Column D Box-shaped bracket E Hollow bracket 12 Bolt hole

Claims (1)

A hole forming process for forming insertion holes and mortises in the base or pillar wood, etc .;
A bolt insertion step of inserting a bolt below the mortise of the wood;
A mortise-like protrusion having a bolt hole formed in the head in advance, and a keyhole-like bolt hole formed of a large-diameter portion and a small-diameter portion formed at a predetermined distance below the tenon-like protrusion are formed on the surface. abuts the abutment step is brought closer to the box-type bracket to said timber so as to insert the bolt head inserted into the timber to the large diameter portion of the box-shaped bracket having a substantially rectangular back plate,
Placing the box-shaped bracket on the bolt by lowering the box-shaped bracket so as to guide the bolt to the small diameter portion; and
A tenon-like collision portion insertion step of inserting the tenon-like collision portion to the mortise,
A tightening step of further tightening the bolt by screwing it into wood; and
A wood standing step for standing the wood by inserting a hollow metal object in which a through hole for inserting a bolt into the insertion hole is formed,
A step tightening of tightening the bolt holes and further box-shaped bracket by inserting a bolt into the bolt insertion hole of the hollow hardware of the tenon-like collision portion after insertion of the tenon-like collision portion to the mortise wood,
A shaft assembling method using a box metal fitting for building, characterized by comprising:

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