JPH0125126Y2 - - Google Patents

Description

[Detailed description of the invention] The invention of the present application relates to reinforcing metal fittings, particularly metal fittings for reinforcing connections such as T-shaped joints in frame construction methods of wooden buildings or prefabricated buildings using lightweight type steel, or reinforcement suitable for connections such as braces and flints. It is related to hardware.

Conventionally, when reinforcing the above-mentioned T-shaped joints, etc., the beam members and girder members arranged in a T-shape were extended to the washer part using a connecting reinforcing hardware called "Hagoita". Insert the connecting bolts from the inside of the girder member, tighten them with nuts at the threaded parts that protrude to the outside of the girder member, and install the tightening bolts into the washer parts from the washer part side to the beam members from the side of the washer parts. It is widely known to insert the beam into a bolt hole and tighten the beam member and girder member in a T-shape using a nut.

However, in the above-mentioned reinforcing hardware called "Hagoita", the connecting bolts to the girder members are extended integrally by welding the washers, etc., so they are long and inconvenient to handle. The connecting bolt with this girder member is inserted into the girder member from the inside of the girder member and tightened with a nut at the threaded end that protrudes to the outside of the girder member, so that the tail end of the connecting bolt is attached to the outside of the girder member. It protrudes unnecessarily, causing inconvenience in finishing external walls, etc., and it becomes necessary to cut off the protruding end.

In addition, in conventional "Hagoita", when tightening the tightening bolt that is inserted into the beam member, the bolt shaft rotates as the tightening nut rotates, so the head of the bolt and the tightening It is necessary to tighten the nut using two wrenches on both sides, and therefore, the tightening operation using both hands when working at heights is inevitably dangerous.

Furthermore, even if the nuts of the above-mentioned known "Hagoita" are tightened strongly, over a long period of time, the wood will dry out and become thinner, and the nuts may become loose due to vibration etc., resulting in poor connection or the possibility of the nuts falling off. In this way, it is difficult to achieve the purpose of reinforcing connections such as T-shaped joints.

In view of the above, the inventor of the present application has completed the present invention as a result of research.

Therefore, the purpose of the invention of the present application is to use it as a connecting reinforcing metal fitting such as a T-shaped joint which can overcome and eliminate the drawbacks of the above-mentioned known connecting reinforcing metal fittings, and also to use it as a connecting reinforcing metal fitting such as a T-shaped joint, etc. The purpose of this invention is to provide a reinforcing hardware that can contribute to adjusting the angle of the corner parts between the members and strengthening and stabilizing the parts. When tightening a nut, provide reinforcing hardware that can be safely tightened by rotating only the bolt head side without using a wrench on both the nut side and bolt head side, and after tightening the nut. The purpose of this invention is to provide reinforcing metal fittings that can prevent the possibility of them loosening or falling off, and the next objective of the present invention is to improve productivity and provide inexpensive metal fittings with an extremely simple structure. It is to provide reinforcing hardware.

The configuration of the present invention will be described as follows with reference to the accompanying drawings showing embodiments.

The head side of the bolt 2, which has a threaded part 1 on the tail side of the shaft part, is shaped into an even polygonal shape such as 4 to 8 sides in the axial direction and in the direction perpendicular to the axis (the figure is a quadrilateral).The head 3 bulges out.
and a bolt insertion hole 4 opening in a bulged specific surface of the head 3 and a surface corresponding to the specific surface.
and on one side of the opening of the hole 4,
A step 6 or a concave portion 7 for preventing rotation of the nut is formed at a position where the outer wall of the nut 5 easily comes into contact with the nut.
When inserting the connecting bolt 8 into the insertion hole 4, it is easy to insert it from the opposite side of the step 6 or recess 7, and when tightening a nut onto the threaded portion of the inserted connecting bolt 8, the step 6 or recess 7 The inner wall surface of the nut 5 prevents the nut 5 from rotating, and the nut 5 is also prevented from loosening due to vibration or the like after the nut is screwed.

In the above configuration, the screw portion on the tail side may be formed into a pointed shape, and the end face of the head portion may be indented with a + or − type groove portion 9 for rotation. (4th.
(Fig. 6) Furthermore, in the above configuration, instead of making the head side bulge in a square shape, two sides are made to correspond to each other as flat surfaces, bulging out in a circular or elliptical shape, and the bolt insertion hole 4 is passed through the flat part. Then, a step 6 or a recess 7 is cut out on one side of the plane, a specific surface of the tightening nut 5 is brought into contact with the inner wall surface of the step 6 or the recess 7, and the nut is welded and locked. It is also possible to adopt a structure in which the nut is inserted in a right angle direction from the opposite side of the notch such as the step 6, and the connecting bolt 8 is rotated on the head side to screw the nut, and then the rotation of the nut is prevented. (Figs. 1, 2, 7, 8) Next, as another embodiment of the present invention, the second,
As shown in Figures 9 and 10, a hole 4 for bolt insertion is passed through the bulging head 3 in an oblique direction with respect to the longitudinal direction of the shaft, and a nut rotation prevention hole is provided at the opening on the tail side of the hole 4. A recessed part 7' and a raised part 10 are provided for
A tightening nut 5 is arranged and welded to the inner wall of the concave portion 7' and the slope of the raised portion 10, and the hole 4 on the opposite side of the nut 5 is welded.
The corner bolt 11 is inserted along the hole 4 from the opening of the
can be inserted, and the bolt 11 is rotated on the head side to be screwed into the nut 5 and the corner portion is tightened. (Fig. 2) Since the invention of the present application has the above-mentioned configuration, it is mainly used in T-shaped joints in the framework construction method of wooden buildings, for connecting the beam members 12 and girder members 13 arranged in a T-shape, and for other purposes such as foundations, etc. When constructing a corner connection reinforcing metal fitting, the tightening bolt 2 according to the present invention is inserted into the beam member 12 in which the bolt hole 14 has been previously provided, and after temporarily tightening the nut 5' to the threaded part, The connecting bolt 8 is inserted into the hole 4 from the outside of the upper girder member 13 arranged in a T-shape, and the connecting bolt 8 is rotated at its head to be screwed into the tightening nut 5 and tightened, and the nut of the bolt 2 is tightened. Tighten 5' to strengthen the T-shape joint.

Therefore, when inserting the connecting bolt 8 into the hole 4, since the hole 4 is a so-called stupid hole without a threaded part, the tightening bolt 1 of the beam member 12 according to the present invention and the girder member 13 are Even if the connecting bolt 8 does not maintain an accurate right-angled relationship with other connecting bolts 8, the connecting bolt 8 has flexibility within the insertion hole 4, so the insertion work is easy and work efficiency can be improved. .

Furthermore, a step or recess is provided at the head of the tightening bolt, and the outer wall surface of the tightening nut is regulated by the inner wall surface of the step or recess. It is possible to prevent the possibility of loosening or falling off.

Furthermore, the tightening bolt of the present application has a hole for bolt insertion through the bulging head, and is made into a blank hole, so the machining is simple, labor-saving, and productive, compared to drilling a screw hole. It has excellent properties and can be provided at low cost.

In addition, in T-shape joints, etc., the connecting bolts are inserted from the outside of the girder member and rotated and tightened by their heads, so they can be inserted from the inside of the girder member like the conventional connecting fittings called "hagoita". Compared to the case where the connecting bolts are inserted into the girder members and tightened with nuts on the outside, work such as cutting off the excess tail end of the connecting bolts is omitted, which becomes a hindrance to continuing the external wall work. There is no fear.

Furthermore, there is no need to use multiple wrenches when tightening the connecting reinforcing metal fittings in a high-altitude work environment after the beam members and girder members are arranged in a T-shape, which saves labor and reduces work. This invention has various practical effects such as being able to ensure safety.

[Brief explanation of the drawing]

In the accompanying drawings showing the embodiments, Fig. 1 is a plan view showing a state in which a T-shaped dovetail joint is connected and reinforced using the bolt of the present invention, and Fig. 2 is a plan view showing a state in which the T-shaped corner portions are connected. , Fig. 3 is a perspective view of a bolt provided with a step according to the present invention, Fig. 4 is a perspective view of a wood screw provided with the same step, Fig. 5 is a perspective view of a bolt provided with the same recess, and Fig. 6 is a perspective view of a bolt provided with the same recess. A perspective view of a wood screw provided with the same concave portion, FIG. 7 is a plan view of a bolt with a circularly bulged head, and FIG. 8 is a sectional view taken along the line A-A in FIG. 7.
FIG. 9 is a plan view of a bolt having an oblique bolt insertion hole in its head, and FIG. 10 is a sectional view taken along the line B--B in FIG. 9.

Claims (1)

[Scope of utility model registration request] In a connection reinforcing hardware consisting of a tightening bolt and a connecting bolt, the head side is bulged in the axial direction and in the direction perpendicular to the axis, and the bolt insertion hole 4 is passed through the bulged head 3 at an arbitrary angle. The tightening bolt 2 has a stepped portion 6 or a recessed portion 7 with a wall surface parallel to the hole direction on the outside of the insertion hole 4, and the screw of the connecting bolt 8 is attached to the tightening nut 5 disposed outside the hole 4. A T characterized by having parts screwed together.
Connection reinforcing hardware such as Shiguchi with characters.