JPH11336731A - Bolting hardware - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always apply the turning force so as to follow up the change with time of a material to be fastened by providing a spring working on the bolt head part to energize the fastening direction and a hexagonal hollow shaft in the interior of an inner cage fixed to a flat plate. SOLUTION: A circular hole is bored in the central area of a flat plate 4, a double conical shape of an inner cage 3 is fixed to the flat plate 4, a spring 5 is fitted to the inner cage 3, and the spring 5 is also connected to a hexagonal hollow conical shaft 2. Further, a conical outer cage 1 slotted to be circular is put thereon, and a screw 6 is fastened to the inner cage 3. Secondly, with the assembled flat plate 4 fitted to the bolt head and turned in the rotating direction of fastening the bolt, hardware is fixed by a nail or screw. Thus, in the structural connecting part of a wooden dwelling house, the bolt is turned following up loosening of fastening caused by shrinkage of wood connected by the bolt so that fastening is automatically advanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a structural material for a new building or an extension or renovation of a building, in which when a bolt is loosened several years later when the bolt is loosened, the building shakes greatly. The present invention relates to a method of attaching hardware for keeping bolts in a tightened state, since there is a possibility that the bolts will be damaged and may be destroyed.

[0002]

2. Description of the Related Art Conventional connection of pillars, beams, girders, etc. of a building is usually in the same state as when bolts are tightened.

[0003]

At present, especially at the structural connection of a wooden house, various types of bolts such as pillars and trunks, beams and girders are connected by bolts, but the bolts are tightened due to the shrinkage of the tree. The place becomes loose, and the trees may collide with each other due to the earthquake or shaking of the ground, and the trees may be damaged. It also leads to a reduction in the overall strength of the building.

[0004]

[Means for Solving the Problems] Bolts that have been noticed when rebuilding buildings and houses are re-tightened. However, places where there is a lot of looseness and where they cannot be seen, and places where the body does not enter can not be tightened. There's a problem. Therefore, if a force is applied by a spring in the rotational direction in which the bolt is always tightened, the gap between the bolt and the member is eliminated when the tree shrinks and various members shrink.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a small-sized bolt with a spring having a prototype of a bolt is actually manufactured, and when the material is to be separated from the bolt assuming the shrinkage of the tree, the bolt rotates and follows to follow the bolt. come.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 A circular hole is made in the center of a flat plate 4, a double cone of the inner cage 3 is fixed to the flat plate, and a spring 5 is attached to the inner cage 3 in FIG. The spring 5 is connected to the conical shaft 2 of the square hollow and fixed. further,
Cover the outer basket 1 with a circular hole and screw 6
To the inner basket 3. Turn the bolt in the direction of rotation to fasten the bolt, and fix the hardware with nails and screws while the bolt is still attached.

[0007]

The present invention is embodied in the form described above, and it is desired to improve the effects as described below.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view and sketch drawing of an outer cage, an inner cage, and a hexagonal hollow shaft to be inserted therein.

FIG. 2 is a connection diagram of a hexagonal hollow shaft and a spring of an inner cage, and an explanatory diagram of usability.

[Explanation of symbols]

 1 outer basket 2 hexagonal hollow cone 3 inner basket 4 flat plate 5 spring 6 screw

Claims (1)

[Claims] (1) Steel frame structures, such as pillars, beams, and girders of a wooden building, are connected and connected by bolts. Is a hardware that applies force in the direction of rotation that is always tightened so that there is shrinkage of the tree due to air drying in the house and there is a gap with the bolt at the existing position and it does not serve as the tightened bolt.