JP3059539U - Bolt fasteners in buildings - Google Patents

Abstract

(57) [Problem] To prevent a bolt from loosening even when a wooden member through which the bolt penetrates becomes thin or when a building is subjected to vibration due to an earthquake. SOLUTION: A first nut (7) is screwed inside a protruding end (3a) of a bolt (3) penetrating a wooden member (1), and a first nut is screwed outside the protruding end of the bolt (3). A coil spring (9) is provided outside, an inner end (9a) of the coil spring is fixed to a first nut, and a second nut (11) is screwed to the outside of the coil spring at a protruding end of a bolt. The outer end (9b) of the coil spring is fixed to the second nut, and the third nut (13) is screwed to the outside of the second nut at the protruding end of the bolt, so that the coil spring always tightens the first nut. It has a tendency to rotate.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a fixing device for a bolt in a building, and more particularly to a fixing device for fixing a bolt penetrating a wooden member such as a pillar or a base in a building.

[0002]

[Prior art]

 As a fixing tool for fixing such a bolt, a nut is generally used. That is, the bolt is fixed by screwing a nut to a protruding end of the bolt penetrating a wooden member such as a pillar or a base.

[0003]

[Problems to be solved by the invention]

 However, when the nut is simply screwed into the protruding end of the bolt as described above, if the wooden member through which the bolt passes becomes thin, a gap is created between the nut and the wooden member, and the bolt is loosened. Will be. However, when the building is completed, the protruding ends of the bolts are hidden inside the wall, floor, ceiling, etc., so it is not easy to retighten the nuts even if the bolts are loosened. Also, nuts screwed into the protruding ends of bolts may be loosened by vibration during an earthquake. In view of such circumstances, the present invention provides a bolt for a building in which the bolt does not loosen even if the wooden member through which the bolt passes is thin or the building is subjected to vibration due to an earthquake. It was intended to provide a fastener.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a bolt fixing device for a building in which a nut, which is screwed to a projecting end of a bolt penetrating a wooden member, is prevented from being loosened by a coil spring. is there. That is, the bolt fixing device in the building according to the present invention is such that the first nut is screwed inside the protruding end of the bolt penetrating the wooden member, and the coil spring is mounted outside the first nut at the protruding end of the bolt. The inner end of the coil spring is fixed to the first nut, a second nut is screwed on the outside of the coil spring at the protruding end of the bolt, and the outer end of the coil spring is connected to the second nut. Fix it, screw a third nut on the outside of the second nut at the protruding end of the bolt, tighten the first nut against the wooden member, and tighten the second nut inward against the force of the coil spring. The third nut is brought into close contact with the second nut so that the coil spring has a tendency to always rotate in the direction in which the first nut is tightened.

[0005] In the present specification including the claims of the utility model registration, "outside" means a side of the protruding end of the bolt that penetrates the wooden member and away from the wooden member, and "inside" means that penetrates the wooden member. The side near the wooden member at the projecting end of the bolt shall be referred to. In addition, the term “coil spring” in the present specification, including the claims of utility model registration, includes not only a steel wire wound in a coil shape but also a steel wire wound in a coil shape.

[0006]

[Action]

 If the wooden member through which the bolt is penetrated becomes thin or the building is subjected to earthquake vibration, if the first nut inside the protruding end of the bolt through which the wooden member penetrates loosens, the first nut will become a coil. Since the first nut is rotated in the tightening direction by the spring, the first nut is always maintained in a tightened state with respect to the wooden member. Incidentally, both ends of the coil spring are fixed to the first nut and the second nut.However, the second nut is loosened outward because the third nut is in close contact with the outside of the second nut. There is no.

[0007]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings. Reference numeral 1 denotes a wooden member such as a pillar or a base in a building. A first nut 7 is screwed into the protruding end 3a of the bolt 3 through which the wooden member 1 passes through an appropriate washer 5 or the like as an example. A coil spring 9 is provided outside the first nut 7 at the protruding end 3 a of the bolt 3, and the inner end 9 a of the coil spring 9 is fixed to the first nut 7. A second nut 11 is screwed onto the outside of the coil spring 9 at the projecting end 3 a of the bolt 3, and the outer end 9 b of the coil spring 9 is fixed to the second nut 11. A third nut 13 is screwed onto the outside of the second nut 11 at the protruding end 3a of the bolt 3. By tightening the first nut 7 against the wooden member 1, tightening the second nut 11 inward against the force of the coil spring 9, and bringing the third nut 13 into close contact with the second nut 11, the coil spring 9 is It has a tendency to always rotate the first nut 7 in the tightening direction.

FIG. 1 shows an example in which the fixing device according to the present invention is used as a bolt 3 in a vertical member such as a column that is hidden inside a wall member 14.

FIG. 3 shows an example in which the fastener according to the present invention is used as a bolt 3 at a joint between a vertical wooden member 1a such as a pillar and a horizontal wooden member 1b such as a beam or a girder. The reference numeral 15 in FIG. 3 is a feather board.

FIG. 4 shows an example in which the fastener according to the present invention is used as an anchor bolt 3 ′ for fixing a wooden member 1 c such as a base to a foundation 17.

[0011]

[Effect of the invention]

 As described above, according to the present invention, when the wooden member through which the bolt is penetrated becomes thinner or when the building is subjected to vibration due to an earthquake, the inner side of the protruding end of the bolt through which the wooden member penetrates is formed. When the one nut tries to be loosened, the first nut is rotated in the tightening direction by the coil spring, so that the first nut is maintained in a state of being constantly tightened against the wooden member. Therefore, the bolt penetrated through the wooden member is always kept in a loose state. This effect is particularly noticeable for bolts that are difficult to retighten because they are hidden inside walls, floors, ceilings, etc. when the building is completed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of a use state of a fastener according to the present invention.

FIG. 2 is an exploded side view showing the fixing device.

FIG. 3 is a perspective view showing another example of a usage state of the fixing device.

FIG. 4 is a perspective view showing still another example of the usage state of the fixing device.

[Explanation of symbols]

 Reference Signs List 1 wooden member 1a wooden member 1b wooden member 1c wooden member 3 bolt 3 'anchor bolt 3a projecting end 5 washer 7 first nut 9 coil spring 9a inner end 9b outer end 11 second nut 13 third nut 14 wall material 15 feather plate 17 Foundation

Claims (1)

[Utility model registration claims] 1. A first nut is screwed inside a projecting end of a bolt penetrating a wooden member, and a coil spring is externally provided outside the first nut at a projecting end of the bolt. Fix the inner end to the first nut, screw the second nut on the outside of the coil spring at the protruding end of the bolt,
An outer end of the coil spring is fixed to a second nut, a third nut is screwed to the outside of the second nut at a protruding end of the bolt, a first nut is tightened to a wooden member, and a second nut is coiled. Tightened inward against the force of the spring, by bringing the third nut into close contact with the second nut, the coil spring has a tendency to always rotate in the direction to tighten the first nut, Fasteners for bolts in buildings.