JPH0617603B2 - Truss member fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a member joint of a building truss.

[Prior art]

Conventionally, as a member joint of a truss, (1) Japanese Patent Application No. 59-17238
Those disclosed in Japanese Utility Model Publication No. 3, No. 61-87801 and (2) Japanese Patent Publication No. 56-29064 are known.

[Problems to be solved by the invention]

In the case of the truss member joint of the above (1), the angle of the chord member with respect to the joint fitting cannot be finely adjusted, so that there is a drawback that excessive stress is generated in the three-dimensional truss structure. Since it is necessary to insert the bolt into the joint fitting and rotate the bolt, there is a drawback that the joint fitting becomes large and the manufacturing cost thereof becomes high.

Further, in the case of the member joint of the truss of the above (2), the angle of the connecting disc-equipped pipe rod with respect to the hollow ball cannot be finely adjusted, so that there is a disadvantage that excessive stress is generated in the three-dimensional truss structure, In addition, since a large-sized and complicated rotating cylinder mechanism is required, and further, an annular cutout having a right-angled cross section for fitting the rotating cylinder mechanism needs to be provided on the outer surface of the hollow ball. Becomes complicated.

[Object and Structure of Invention]

An object of the present invention is to provide a truss member joint that can advantageously solve the above-mentioned problems, and the gist of the present invention is to provide a non-circular cross-section shaft portion 1 in the intermediate portion and Joining bolt 3 with head 2 at the end
Is inserted through the through hole 5 for bolt insertion at the end of the member 4 from the inside of the member 4, and between the elastic body receiving portion for extrusion provided in the member 4 and the joining bolt 3, the elastic force for bolt extrusion is provided. With the body 6 interposed, the end portion of the non-circular cross-section shaft portion 1 is projected from the member 4, and the bolt pushing elastic body 6 is compressed, the joining bolt is screwed with the member 4 by the set screw 7. 3 is fixed to the member 4, the male screw shaft portion 10 of the joining bolt 3 is inserted into the non-circular hole 9 of the small-diameter cylindrical sleeve 8 for rotating and supporting the bolt, and the end portion of the non-circular cross-section shaft portion 1 is inserted. Is fitted so as to be slidable and does not rotate relatively, and a fitting metallic member 18 having a screw hole 16 into which the male screw shaft portion 10 of the joining bolt 3 is screwed is provided with a convex spherical outer surface. The concave spherical surface 19 matching the spherical outer surface and the tip surface of the small-diameter cylindrical sleeve 8 are brought into contact with each other. Spherical washers 21 having a surface 20,
A truss member joint is characterized in that it is interposed between the small-diameter cylindrical sleeve 8 and the joint fitting 18.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

1 to 7 show an embodiment of the present invention, in which a tip end of a non-circular cross-section shaft portion 1 composed of a regular hexagonal shaft portion is the same as or different from the regular hexagonal inscribed circle. A male screw shaft portion 10 having a diameter slightly smaller than that of the regular hexagonal circumscribed circle is provided at a base end portion of the non-circular cross-section shaft portion 1 and a circular cross-section having a diameter slightly larger than the hexagonal circumscribed circle. The shaft portion 11 and the head portion 2 are sequentially connected to form a joining bolt 3,
The through hole 5 in the frustoconical steel end fitting 12 having a circular bolt insertion through hole 5 in the center of the small diameter end.
, The joining bolt 3 is inserted from the inside of the end fitting 12,
An elastic body for extruding a bolt, which is a spiral spring, is provided between the elastic body receiving portion for extruding, which is a spring receiving metal fitting 13 fixed to the end metal fitting 12 by welding or an adhesive agent, and the head of the joining bolt 3. 6 is interposed.

The large-diameter end of the end fitting 12 is a member body 1 made of steel pipe.
4 is fitted to the end of the end fitting 4 and is fixed by welding, and the joining bolt 3 is attached to the end fitting 1 in the screw hole provided at the small-diameter end of the end fitting 12 so as to extend in the radial direction.
A set screw 7 for fixing to 2 is screwed, and the end fitting 12 and the member main body 14 constitute a member 4.

A regular hexagonal rotating tool engaging surface is formed on the outer periphery of a small diameter cylindrical sleeve 8 for bolt rotation and pressure support having a non-circular hole 9 formed of a regular hexagonal hole, and the tip of the shaft portion 1 of the non-circular cross section. The joint bolt 3 is fixed to the steel end fitting 12 by the set screw 7 in a state where the portion is projected from the end surface of the steel end fitting 12.
Further, the tip of the non-circular cross-section shaft portion 1 is fitted into the small-diameter tubular sleeve 8 for bolt rotation and pressure bearing, and the male screw shaft portion 10 is arranged. It is configured so that it slides in the small-diameter cylindrical sleeve 8 for pressure-supporting, but does not rotate relative to the small-diameter cylindrical sleeve 8 for rotating bolt and pressure-supporting. Further, a large number of screw holes 16 are radially provided in the steel joint fitting body 15 made of a spherical shell, and a convex spherical outer surface is provided around the screw holes 16 on the outer surface of the joining fitting body 15 so that the joining fitting 18 is formed. It is configured.

An annular spherical washer 21 having a concave spherical surface 19 that fits the convex spherical outer surface and a flat surface that abuts on the tip end surface of the small-diameter cylindrical sleeve 8 is provided between the small-diameter cylindrical sleeve 8 and the spherical outer surface of the joint fitting 18. Intervened between.

When connecting the member joints according to the above-described embodiment, the concave spherical surface 19 of the steel spherical washer 21 is brought into contact with the convex spherical outer surface of the joint fitting 18, and the tip of the male screw shaft portion 10 of the joint bolt 3 is jointed with the joint. After being arranged so as to oppose the end of the screw hole 16 in the metal fitting 18, the push screw 7 is loosened and separated from the joining bolt 3, so that the joining bolt 3 is pushed by the bolt pushing elastic body 6. hand,
The tip of the male screw shaft portion 10 is pressed into the end portion of the screw hole 16, and in this state, the joining bolt 3 is rotated in the bolt tightening direction by a rotating tool such as a spanner engaged with the small diameter cylindrical sleeve 8. The joint bolt 3 moves the joint bolt 1
8 is screwed into the screw hole 16 and tightened, and then the set screw 7 is tightened to fix the joining bolt 3 and the steel end fitting 12. FIG. 2 shows a state in which the joining metal fitting 18 and one member 4 are completely connected.

8 and 9 show another example of the sectional shape of the small-diameter cylindrical sleeve 8 for rotating and supporting bolts. In the case of FIG. 8, a non-circular hole 9 consisting of a regular hexagonal hole is shown. A large number of turning tool engaging recesses 22 are provided at equal angular intervals on the cylindrical outer surface of the small-diameter cylindrical sleeve 8 having. Further, in the case of FIG. 9, a non-circular hole 9 consisting of parallel planes facing each other in the diametrical direction and arcuate surfaces connecting both ends of the plane in the width direction is provided in the small-diameter cylindrical sleeve 8, and On the cylindrical outer surface of the cylindrical sleeve 8, a large number of turning tool engaging recesses 22 are provided at equal angular intervals.

When carrying out the present invention, the member 4 and the joint fitting 1
8 may be made of aluminum and end fittings 12
May have any shape.

Rubber or other elastic body may be used as the elastic body 6 for pushing out the bolt, and the elastic body receiving portion for pushing out is the member main body 14.
May be integrally provided.

The elastic body 6 for extrusion may be fixed to the head of the joining bolt 3 by an adhesive or other means, and the joining metal fitting 18 may not be hollow. Furthermore, the present invention is
It can be carried out to connect the joining metal fittings to members such as chords, diagonal members and bundles.

〔The invention's effect〕

According to the present invention, the joining bolt 3 having the non-circular cross-section shaft portion 1 at the middle portion and the head portion 2 at the base end portion has the member 4 in the bolt insertion through hole 5 at the end portion of the member 4. A bolt pushing elastic body 6 is inserted between the pushing elastic body receiving portion provided inside the member 4 and the joining bolt 3, and the end portion of the non-circular cross-section shaft portion 1 is a member. 4 and the elastic body 6 for pushing out the bolt is compressed, the joining bolt 3 is attached to the member 4 by the set screw 7 screwed into the member 4.
And the male screw shaft portion 10 of the coupling bolt 3 is inserted into the non-circular hole 9 of the small-diameter cylindrical sleeve 8 for rotating and supporting the bolt, and the end portion of the non-circular cross-section shaft portion 1 is slidable. The fitting metal fitting 18 having a screw hole 16 into which the male screw shaft portion 10 of the joining bolt 3 is screwed, and is provided with a convex spherical outer surface and adapted to the convex spherical outer surface. Since the spherical washer 21 having the concave spherical surface 19 and the flat surface 20 that abuts on the tip end surface of the small-diameter cylindrical sleeve 8 is interposed between the small-diameter cylindrical sleeve 8 and the joint fitting 18, the joint fitting The angle of the member 4 with respect to 18 can be finely adjusted, so that it is possible to prevent excessive stress from being generated in the space truss structure, and when connecting the member joints, simply use the male screw shaft in the joint bolt 3. Part 1
0 is made to face the screw hole 16 of the steel joint fitting 18, and the male screw 7 is loosened, so that the force of the elastic body 6 for bolt extrusion pushes the tip of the male screw shaft 10 into the screw. It can be automatically press-fitted into the end portion of the hole 16, and in this state, the joining bolt 3 is simply rotated in the tightening direction by the rotating tool through the small diameter cylindrical sleeve 8 for rotating the bolt and supporting pressure. By simply doing so, the male screw shaft portion 10 of the joining bolt 3 can be easily screwed into the screw hole 16 of the steel joining fitting 18 and tightened. Further, particularly in the case of the present invention, the sleeve 8 has a small diameter tubular shape. Since the structure is simple, the sleeve 8 can be manufactured at low cost, and the member joint of the truss of the present invention has a simple structure and can be manufactured at low cost.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view showing a state in which a member joint of a truss is opposed to a joint fitting, and FIG. FIG. 3 is a vertical sectional side view showing the state of FIG. 1, FIG. 3 is a sectional view taken along line AA of FIG. 1, FIG. 4 is a sectional view taken along line BB of FIG. 1, and FIG. 5 is taken along line CC of FIG. Sectional view, FIG. 6 is a side view of the joining bolt, FIG.
The figure is a vertical side view of the spherical washer. FIG. 8 and FIG. 9 are views showing another example of the cross-sectional shape of the small diameter tubular sleeve for rotating the bolt and supporting the pressure. In the figure, 1 is a non-circular cross-section shaft part, 2 is a head part, 3 is a connecting bolt, 4 is a member, 5 is a through hole for inserting a bolt, 6 is an elastic body for pushing out a bolt, 7 is a set screw, and 8 is a bolt screw. Small diameter cylindrical sleeve for dynamic and pressure bearing, 9 is a non-circular hole, 10 is a male screw shaft portion, 1
2 is a steel end fitting, 13 is a spring receiving fitting, 14 is a member main body, 16 is a screw hole, 18 is a steel joining fitting, 19 is a concave spherical surface, and 21 is a steel spherical washer.

Claims (1)

[Claims] 1. A joining bolt 3 having a non-circular cross-section shaft portion 1 at an intermediate portion and a head portion 2 at a base end portion, and a bolt insertion through hole 5 at an end portion of the member 4 inside the member 4. The bolt pushing elastic body 6 is interposed between the pushing elastic body receiving portion provided in the member 4 and the joining bolt 3.
With the end of the non-circular cross-section shaft portion 1 protruding from the member 4 and the bolt pushing elastic body 6 compressed, the member 4
The joining bolt 3 is fixed to the member 4 by the set screw 7 screwed to the male screw shaft portion 10 of the joining bolt 3 is inserted into the non-circular hole 9 of the small-diameter cylindrical sleeve 8 for turning and supporting the bolt. , The end portion of the non-circular cross-section shaft portion 1 is slidably fitted so as not to rotate relatively, and the joining bolt 3
The fitting 18 having the screw hole 16 into which the male screw shaft portion 10 is screwed is provided with a convex spherical outer surface, and is brought into contact with the concave spherical surface 19 conforming to the convex spherical outer surface and the tip surface of the small-diameter cylindrical sleeve 8. A member joint for a truss, wherein a spherical washer 21 having a flat surface 20 is interposed between the small diameter cylindrical sleeve 8 and the joint fitting 18.