JPH0617599B2 - 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, one having the following structure is known.

(1) As disclosed in Japanese Utility Model Laid-Open No. 60-130901, a bolt having an engaging groove extending in the longitudinal direction of a screw shaft is provided in the hollow joint fitting from inside the hollow joint fitting. A rotating metal fitting, which is inserted into the through hole of the peripheral wall and has an engaging protrusion on the hole wall, is fitted into the screw shaft portion of the bolt outside the hollow joint metal fitting, and the engaging protrusion of the rotating metal fitting is formed. Fit into the engagement groove of the screw shaft,
A member joint configured to rotate a bolt by the rotating metal fitting and screw the bolt into a screw hole at the end of the member.

(2) As disclosed in Japanese Patent Laid-Open No. 59-210135, a bolt is inserted from inside the member into a bolt insertion through hole provided at the end of the member, and the bolt is provided inside the member. It is pressed by the pushing spring to project from the end face of the member, the end of the member is made to face the outer surface of the hollow joint fitting having the operation opening and the screw hole for bolt screwing, and by the force of the pushing spring. The tip of the bolt is engaged with the end of the screw hole, the rotary tool inserted into the hollow joint fitting is engaged with the engaging recess of the tip of the bolt, and the bolt is rotated by the rotary tool. , A member joint configured such that the bolt is screwed and tightened into a screw hole of a hollow joint fitting.

(3) As disclosed in Japanese Utility Model Publication No. 56-52323, the bolt is inserted into the through hole from the inside of the hollow joint fitting having the operation opening and the through hole for inserting the bolt, and A member joint configured to be screwed into a threaded hole at an end, engage a rotating tool with a head of a bolt inside a hollow joint, and tighten the bolt with the rotating tool.

[Problems to be solved by the invention]

However, in the case of the truss member joints of (1) to (3) above,
Since it is necessary to insert the rotary tool from the hollow joint of the bolt into the through hole of the peripheral wall of the hollow joint, or to insert the rotating tool inside the hollow joint and rotate the bolt with the rotating tool, There is a problem that the hollow joint fitting becomes large in size and costly, and it is difficult to insert or rotate the bolt.

[Object and Structure of Invention]

An object of the present invention is to provide a member joint for a truss which can advantageously solve the above-mentioned problems and also has other excellent effects, and an engaging groove 1 extending in the longitudinal direction of the screw shaft portion. The bolt 2 provided with is inserted into the bolt insertion through hole 4 at the end of the member 3 from the inside of the member 3, and between the pushing elastic body receiving portion provided in the member 3 and the bolt 2. The bolt push-out elastic body 5 is interposed, and the screw shaft portion of the bolt 2 is inserted into the rotating metal fitting 6 which is composed of an annular rotating metal fitting body 17 and an engaging projection 7 integrally provided in the through hole 16. At the same time, the engaging projection 7 of the rotating metal fitting 6 is fitted into the engaging groove 1 of the bolt 2, and the end of the screw shaft portion of the bolt 2 projects from the rotating metal fitting 6. The member joint of the truss is the first invention, and the engaging groove 1 extending in the longitudinal direction of the screw shaft portion is provided. The bolt 2 is inserted into the bolt insertion through hole 4 at the end of the member 3 from the inside of the member 3, and a bolt is provided between the pushing elastic body receiving portion provided in the member 3 and the bolt 2. On the end face of the member 3, a rotary metal fitting 6 including an annular rotary metal fitting body 17 and an engaging projection 7 integrally provided in the through hole 16 and a concave spherical front surface 8 are provided with an elastic body 5 for pushing. And the washer 9 having the above are sequentially overlapped with each other, the screw shaft portion of the bolt 2 is inserted into the rotating metal fitting 6 and the washer 9, and the engaging projection 7 of the rotating metal fitting 6 is aligned with the engaging groove 1 of the bolt 2. It is inserted, and the end of the screw shaft portion of the bolt 2 projects from the concave spherical front surface 8 of the washer 9, and a gap 10 is provided between the periphery of the screw shaft portion of the bolt 2 and the hole of the washer 9. A featured member joint of a truss is a second invention.

〔Example〕

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

1 to 6 show a member joint of a truss according to a first embodiment of the first invention, which is a truncated cone shape having a through hole 4 for inserting a bolt in the center of a small diameter end. The screw shaft portion of a bolt 2 having an engaging groove 1 extending in the longitudinal direction of the screw shaft portion is inserted into the through hole 4 of the steel end metal member 11 from the inside of the end metal member 11. Further, between the elastic body receiving portion for extruding which is a spring receiving metal fitting 12 fixed to the end fitting 11 by welding or an adhesive agent and the head of the bolt 2, an elastic body 5 for extruding a bolt which is a spiral spring is provided. Is intervened.

The large-diameter end of the end fitting 11 is a member body 1 made of a steel pipe.
The bolt 2 is fixed to the end fitting 11 in a screw hole that is fitted to the end of the end fitting 3 and fixed by welding, and further extends in the radial direction at the small-diameter end of the end fitting 11. A push screw 14 for screwing is screwed, and the end fitting 11 and the member main body 13 form a member 3.

The engagement is made on the inner surface of the through hole 16 in the annular rotating metal fitting body 17 including the front and rear surfaces formed of a flat surface, the polygonal outer surface 15 for engaging the rotating tool, and the through hole 16 for inserting the bolt screw shaft portion. An engaging projection 7 slidably fitted in the groove 1 is integrally provided to form a rotating metal fitting 6, and the projecting length of the screw shaft portion of the bolt 2 is greater than the pressure T ₁ of the rotating metal fitting 6. Sa T
₂ is set large. Further, a large number of screw holes 19 are radially provided in the steel joint fitting body 18 made of a spherical shell,
In addition, the rotary fitting joining flat surface 20 is provided around the screw hole 19 on the outer surface of the joining fitting body 18, and
Is configured.

When connecting the member joints according to the first embodiment, first, as shown in FIGS. 4 and 5, the through hole 16 in the rotating fitting 6 is fitted into the screw shaft portion of the bolt 2, and With the fitting protrusion 7 fitted in the engaging groove 1 and the screw shaft portion of the bolt 2 not protruding from the rotating fitting 6, the push screw 14
Thus, the bolt 2 is fixed to the steel end fitting 11 of the member 3.

Next, the rotating metal fitting 6 is brought into contact with or close to the joint metal fitting 21, and the screw shaft portion of the bolt 2 is arranged so as to face the end portion of the screw hole 19 of the joint metal fitting 21. Is loosened and separated from the bolt 2, the bolt 2 is pressed by the elastic body 5 for pushing out the bolt, and the tip of the screw shaft portion is press-engaged in the end portion of the screw hole 19, and in this state, When the bolt 2 is rotated in the bolt tightening direction via the rotating metal fitting 6 by a rotating tool such as, the bolt 2 is screwed into the screw hole 19 of the joint metal fitting 21 to be tightened, and then the push screw. 14 is tightened and the bolt 2 and the steel end fitting 11 are fixed. FIG. 6 shows a state in which the joining metal fitting 21 and one member 3 are completely linked.

FIG. 7 and FIG. 8 show a member joint of a space transformer according to a second embodiment of the first invention.
Has a spherical surface, and the rotating metal fitting 6 has a concave spherical front surface 8 that abuts on the convex spherical surface around the screw hole 19 of the joining metal fitting 21. This is similar to the case of the first embodiment.

When connecting the member joints of the first embodiment and the second embodiment, the through hole 16 in the rotating fitting 6 is fitted into the screw shaft portion of the bolt 2, and the engaging projection 7 is fitted into the engaging groove 1. In addition, the push screw 14 is loosened so that the tip of the screw shaft portion of the bolt 2 is projected from the rotating metal fitting 6, and the member having the bolt and the rotating metal fitting is provided between the joining metal fittings 21 already attached. When pushing in 3, when the screw shaft portion of the bolt 2 is pushed against the force of the elastic body 5 for pushing out the bolt by the fitting 21, and the screw shaft portion matches the screw hole 19, the elastic body for pushing out the bolt The bolt 2 may be pressed by the force of 5 to automatically insert the tip of the screw shaft into the end of the screw hole 19 and press it.

FIG. 9 and FIG. 10 show an embodiment of the second invention, in which the rotating metal fitting 6 and the washer 9 having the concave spherical front surface 8 are sequentially superposed on the end surface of the member 3 to screw the bolt 2 together. The shaft portion is inserted through the rotating metal fitting 6 and the washer 9, and the end portion of the screw shaft portion of the bolt 2 projects from the concave spherical front surface 8 of the washer 9, and surrounds the screw shaft portion of the bolt 2 and the hole of the washer 9. Although a gap 10 is provided between the first and second parts, the other structure is similar to that of the first embodiment of the first invention.

In the case of the embodiment of the second invention, the rotating metal fitting 6 and the washer 9 are provided.
And is a separate body, and since a gap 10 is provided between the periphery of the screw shaft portion of the bolt 2 and the hole of the washer 9, the washer 9 is formed as shown by a chain line in FIG. It is possible to move in a range, so that when connecting the members, the angular error α between the members can be absorbed.

When embodying the present invention, a plurality of engaging grooves 1 may be provided around the screw shaft portion of the bolt 2, and a plurality of engaging protrusions 7 may be provided around the rotating metal fitting 6.

The member 3 and the joint fitting 21 may be made of aluminum, and the end fitting 11 may have any shape.

Rubber or another elastic body may be used as the elastic body 5 for pushing out the bolt, and the elastic body receiving portion for pushing out is the member main body 13.
May be integrally provided.

The extruding elastic body 5 may be fixed to the head of the bolt 2 by an adhesive agent or other means.
May not be hollow. Furthermore, also in the case of the embodiment of the second invention, a pin having a male screw may be used as the engaging projection.

The present invention can be applied to the connection between the joining metal fitting and members such as chords, diagonal members, and bundles.

In any of the embodiments of the present invention, it is free to use an ordinary washer, nut, or the like on the rotating metal fitting 6 in order to adjust the distance between the truss and the joint metal fitting 21. It does not depart from the gist of the present invention.

〔The invention's effect〕

According to the first aspect of the present invention, the bolt 2 having the engagement groove 1 extending in the longitudinal direction of the screw shaft portion is inserted from the inside of the member 3 into the bolt insertion through hole 4 at the end portion of the member 3, and the bolt is inserted. An elastic body 5 for pushing out a bolt is interposed between the screw shaft portion 2 and the screw shaft portion 2, and the screw shaft portion of the bolt 2 is integrally provided in the ring-shaped rotating metal fitting body 17 and the through hole 16. While being inserted into the rotating metal fitting 6 including the engaging projection 7, the engaging projection 7 of the rotating metal fitting 6 is fitted into the engaging groove 1 of the bolt 2,
Since the end of the screw shaft portion of the bolt 2 projects from the rotating metal fitting 6, when connecting the member joints, the end of the member 3, the rotating metal fitting 6, and the joint metal fitting 21 are simply brought into contact with each other or By bringing them close to each other, the tip of the screw shaft portion of the bolt 2 can be automatically pushed into the end portion of the screw hole 19 in the joint fitting 21 by the force of the bolt pushing elastic body 5, and in this state, By rotating the bolt 2 in the tightening direction via the rotating metal fitting 6 by the rotating tool,
The bolt 2 can be screwed into the screw hole 19 of the joint fitting 21 and tightened, so that the member joints of the truss can be connected easily and quickly by only an operation from the outside, and further, inside the joint fitting 21. Since it is not necessary to insert a hand, a turning tool, or the like, the joint fitting 21 can be miniaturized to be light in weight and manufactured at a low cost. Since the fitting protrusion 7 is integrally provided to configure the rotating metal fitting 6, the engaging protrusion 7 can be firmly engaged with the side surface of the engaging groove 1 of the bolt 2 with a wide surface, and It is possible to increase the attachment strength of the engaging protrusion 7 to the rotating metal fitting body 17, and the structure of the rotating metal fitting 6 having the strong engaging protrusion 7 is simple, and is manufactured at low cost. be able to.

Further, in the case of the second invention, the washer 9 having the concave spherical front surface 8 is superposed on the front portion of the rotating metal fitting 6 in the first invention, so that it is provided between the periphery of the screw shaft portion of the bolt 2 and the hole of the washer 9. Since the gap 10 is provided and the end of the screw shaft portion of the bolt 2 projects from the concave spherical front surface 8 of the washer 9, the concave spherical front surface 8 of the washer 9 is formed into a convex spherical surface around the screw hole 19 in the joint fitting 21. The washer 9 can be moved within the range of the gap 10 in the state in which the members are closely contacted with each other. Therefore, in addition to the effect of the first invention, it is possible to absorb an angular error between the members when connecting the members. The effect is obtained.

[Brief description of drawings]

1 to 6 show a first embodiment of the first invention, in which FIG. 1 is a vertical sectional side view showing a member joint of a space truss separately, and FIG. 2 is a front view of a rotating metal fitting. FIGS. 3 and 4 show a vertical sectional front view of a bolt, and FIG. 4 shows a state in which a rotating metal fitting is fitted into a bolt protruding from a member and is fixed by a set screw so that the bolt does not protrude from the rotating metal fitting. FIG. 5 is a vertical sectional side view, FIG. 5 is a sectional view taken along the line AA of FIG. 4, and FIG. 6 is a vertical sectional side view showing a state in which member joints are connected. FIGS. 7 and 8 show a second embodiment of the first invention, and FIG. 7 shows a bolt for separating a member joint of a space truss and projecting from the member by fitting a rotating metal fitting, FIG. 8 is a vertical sectional side view showing a state in which the bolt is fixed by a set screw so as not to project from the rotating metal fitting, and FIG. 8 is a vertical sectional side view showing a state in which the member joints are connected. 9 and 10 show the second invention, FIG. 9 is a vertical sectional side view of the member joint, and FIG. 10 is a partial vertical sectional side view showing the connected state of the member joint. In the figure, 1 is an engaging groove, 2 is a bolt, 3 is a member, 4 is a through hole for inserting a bolt, 5 is an elastic body for pushing out a bolt, 6 is a rotating fitting, 7 is an engaging protrusion, and 8 is a concave spherical front surface. , 9 is a washer, 10 is a gap, 12 is a spring bracket, 14 is a set screw, 1
Reference numeral 7 is a rotating metal fitting body, 19 is a screw hole, and 21 is a joining metal fitting.

Claims (2)

[Claims] 1. A bolt 2 having an engagement groove 1 extending in the longitudinal direction of a screw shaft portion is inserted from inside of a member 3 into a through hole 4 for bolt insertion at an end portion of the member 3, and is inserted into the member 3. The bolt pushing elastic body 5 is interposed between the provided pushing elastic body receiving portion and the bolt 2, and the screw shaft portion of the bolt 2 is provided in the ring-shaped rotating metal fitting body 17 and the through hole 16. The threaded shaft 6 of the bolt 2 is inserted into the rotary metal fitting 6 that is formed integrally with the engaging metal projection 7, and the engagement projection 7 of the rotary metal fitting 6 is fitted into the engagement groove 1 of the bolt 2. A member joint for a truss, wherein an end portion of the portion protrudes from the rotating metal fitting 6. 2. A bolt 2 having an engaging groove 1 extending in the longitudinal direction of the screw shaft portion is inserted from inside the member 3 into a through hole 4 for bolt insertion at the end portion of the member 3 so that the bolt 3 is inserted into the member 3. A bolt pushing elastic body 5 is interposed between the provided pushing elastic body receiving portion and the bolt 2. The bolt pushing elastic body 5 is integrally formed on the end face of the member 3 with the ring-shaped rotating metal fitting body 17 and the through hole 16. The rotating metal fitting 6 formed of the provided engagement protrusions 7 and the washer 9 having the concave spherical front surface 8 are sequentially superposed, and the screw shaft portion of the bolt 2 is inserted into the rotating metal fitting 6 and the washer 9.
The engaging projection 7 of the rotating metal fitting 6 is fitted into the engaging groove 1 of the bolt 2, and the end of the screw shaft portion of the bolt 2 projects from the concave spherical front surface 8 of the washer 9 to secure the screw shaft portion of the bolt 2. A truss member joint characterized in that a gap 10 is provided between the periphery and the hole of the washer 9.