JP4606137B2 - Battledore bolt - Google Patents

Description

  The present invention relates to a battledore bolt used for joining columns and beams of a wooden building.

  Generally, the structure has a structure in which a through hole for a tightening bolt is provided in the wing plate part with the base of the bolt 固 着 fixed at one end, and the end of the bolt 突出 projecting from the column by passing the bolt に through the column. At the same time, the nut and the horizontal member are screwed and tightened while the tip of the tightening bolt through the horizontal member is projected through the through hole on the side of the blade plate, and the tightening nut is screwed and tightened to the tip. It is made to join.

  In the conventional example, the fastening strength of the column and the horizontal member is drawn by pulling the horizontal member assembled with the tightening bolt to the column side by screwing and tightening the nut screwed into the bolt rod penetrated through the column. However, when a load is applied to the horizontal member in the direction away from the column, that is, the direction opposite to the direction in which the horizontal member is drawn by the bolt rod, the load penetrates the tightening bolt through the tightening bolt. It may concentrate more than necessary in the through-hole portion, the through-hole portion may break, and the original function as a battledore bolt may be impaired.

  The present invention has been devised to provide a battledore bolt that prevents the occurrence of breakage as much as possible by paying attention to such drawbacks of the conventional example.

A through-hole of a tightening bolt is provided in a wing plate portion to which a base portion of a bolt rod is fixed at one end, and the through-hole is provided by bulging upward with the wing plate portion portion being ribbed , and the lower end is the wing plate. It is supposed to be constituted by the inner peripheral edge of the cylindrical portion protruding from the lower surface of the portion .

  According to the present invention, even if a load is concentrated on the edge of the through-hole via the tightening bolt, the edge is constituted by the inner peripheral edge of the cylindrical portion, so that breakage that occurs in the edge is made as much as possible. Can be prevented.

  In addition, since the through-hole is configured in a so-called rib state, it can be expected to improve the flexibility and shearing of the battledore, and to suppress the loosening of the nut due to vibration such as an earthquake by the spring effect, which is generally durable. It is possible to provide a wing plate bolt having increased sexual bonding strength.

  The drawings show one embodiment of a battledore bolt according to the present invention, FIG. 1 is a front view showing a use state, and FIG. 2 is an enlarged cross-sectional view of a main part of FIG.

  A battledore bolt A according to the present invention has a rising part 2, 2 provided relative to one end in a longitudinal direction of a battledore part (main plate) 1 with bent opposite ends, and a bolt at the upper end of the rising part 2. While the base end of the flange 3 is fixed (welded), the other end side of the battledore part 1 is provided with a through hole 5 through which a tightening bolt 4 is inserted.

  The through-hole 5 constituting the battledore bolt A is a cylinder provided by bulging upward the center part of the other end side of the battledore part 1 in the form of a ring-shaped rib (pressed). The lower end of the cylindrical portion 6 is slightly protruded downward from the lower surface 1 ′ of the battledore portion 1 (this protruding amount is a rib-shaped portion including the cylindrical portion 6). It is determined by the size of the shape obtained by 6A press working).

  Accordingly, the through hole 5 is made to coincide with the through hole 14 formed in the horizontal member 13 such that the bolt rod 3 is passed through the through hole 11 formed in the column 10 and the battledore portion 1 is overlapped with the horizontal member 12. The fastening bolt 4 is penetrated from the through hole 14 side, and a fastening nut 7 is screwed and fastened to the tip of the fastening bolt 4 protruding from the through hole 5 to fix the battledore portion 1 to the horizontal member 13, while the column 10 The pillar 10 and the horizontal member 13 are joined together using the wing plate bolt A so that the nut 8 is screwed and fastened to the tip of the bolt rod 3 protruding from the through hole 11.

  The lower end (front end) 6 ′ of the cylindrical portion 6 protruding from the lower surface 1 ′ of the cylindrical portion 6 is reduced to the horizontal member 13 by being fastened to the horizontal member 13 by the tightening bolt 4 and the tightening nut 7 screwed into the bolt. And firmly fixed to the horizontal member 13.

The front view which shows a use condition. The expanded sectional view of the principal part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lung board part 3 Bolt rod 4 Clamping bolt 5 Through-hole 6 Cylindrical part 6a Inner periphery

Claims (1)

A through-hole of a tightening bolt is provided in a wing plate portion to which a base portion of a bolt rod is fixed at one end, and the through-hole is provided by bulging upward with the wing plate portion portion being ribbed , and the lower end is the wing plate. A battledore bolt composed of an inner peripheral edge of a cylindrical portion protruding from the lower surface of the portion .

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