JPH0921179A - Space truss member joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to mount and remove a component easily and prevent galvanic corrosion. SOLUTION: A main part is formed with a connecting metal fitting 10 having a threaded hole 11 and a connecting member 20, which is provided with a connecting bolt 30 which combines a screw with the threaded hole 11 of this connecting metal fitting 10, on the end. The connecting bolt 30 is freely fitted in a through hole 23 provided on the end of this connecting member 20 while the head 31 of the connecting bolt 30 is engaged with the through hole 23 so that it may be projected from the connecting member 20. A coil spring 40 for pushing the connecting bolt is provided in a shrunken state between a stopper member 60. which is engaged with a non-disk engagement area 32 provided on the projecting sided of the connecting bolt 30 and a receiving seat 70 which is mounted on the end face of the connecting member 20. A turning member 50 having a locking groove for a turning tool on the exterior surface is formed substantially like a cylinder so as to cover a rotary stopper member 60 and the coil spring 40 by inserting the connecting bolt fittingly and this turning member is fitted in the stopper member 60 so that they may move only in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a space truss member joint, and more specifically, an improvement of a space truss member joint in which a joint member is connected to a radiation surface of a spherical or polyhedral joint fitting. It is related to.

[0002]

2. Description of the Related Art Conventionally, as this type of space truss member joint, there is known a structure in which a rotating metal fitting is engaged with the outer side of the protruding side of a connecting bolt protruding from the end of a tubular connecting member so as to prevent rotation. (Japanese Patent Publication No. 6-17599, Japanese Patent Publication No. 6)
17603 publication). This conventional three-dimensional truss member joint has a joint bolt that loosely fits a through hole provided in an end fitting attached to the end of the joint member, and an elastic body such as a spring that is compressed inside the joint member. It has a structure in which a rotating metal fitting is always projected outward by a force and is engaged with an engaging groove or a non-circular engaging portion provided on the protruding side outer surface of the joining bolt so as to prevent rotation, and an end metal fitting. The joining bolt can be held in a state where it does not protrude from the rotating metal fitting by a push screw that penetrates through and contacts the joining bolt.

According to the three-dimensional truss member joint constructed as described above, for example, the joint bolt is brought into contact with the screw hole of the spherical joint fitting provided with a plurality of screw holes in the radial direction to rotate the pivot fitting. The joining fitting and the joining member can be connected by. Further, according to this space truss member joint, there is an advantage that a corresponding joining member can be connected between joining fittings arranged with a predetermined span.

[0004]

However, in the conventional three-dimensional truss member joint, since the joining bolts are mounted inside the ends of the joining members, the assembling of the joining members is troublesome and the maintenance is difficult. It's inconvenient. That is, the joining bolt is loosely fitted in the through hole provided in the end fitting attached to the end of the joining member, and a spring or the like is provided between the spring receiving fitting fixed to the end fitting and the head of the joining bolt. Since the elastic body of is contracted and the joining bolt is attached, it takes time to attach. In addition, there is a problem that the removal of the spring when it is replaced is troublesome.

In addition, in order to provide corrosion resistance, a joining member,
Although the end fittings and joining fittings can be made of corrosion-resistant aluminum alloy members, the joining bolts that require strength are generally made of stainless steel members, so dissimilar metals come into contact with each other. However, there is a possibility that electrolytic corrosion may occur between dissimilar metals. In particular, there is a problem that electrolytic corrosion is more likely to occur due to rainwater or condensed water.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a space truss member joint capable of easily mounting and removing constituent members such as joining bolts and preventing electrolytic corrosion. It is intended.

[0007]

In order to achieve the above object, the space truss member joint of the present invention has a joining fitting having a screw hole and a joining bolt screwed to the screw hole of the joining fitting at an end portion. Assuming a three-dimensional truss member joint formed by connecting with a joining member provided, the joining bolt is loosely fitted in a through hole provided at an end of the joining member, and the head of the joining bolt is engaged with the through hole. The joining bolt is extruded between the restraining member that engages with the non-circular engaging portion provided on the protruding side of the joining bolt and the receiving seat mounted on the end face of the joining member. The elastic member is contracted, and the rotating member having the engaging portion of the rotating tool is provided on the outer surface,
The connecting bolt is fitted and formed into a substantially cylindrical shape so as to cover the holding member and the elastic body, and the rotating member and the holding member are fitted so as to be movable only in the axial direction. Characterize.

In the present invention, the engagement between the joining bolt and the restraining member may be arbitrary as long as it engages through the non-circular engagement portion provided on the joining bolt. Preferably, a bifurcated shape in which flat engaging surfaces are formed on opposing outer surfaces of the non-circular engaging portion of the joining bolt, and the restraining member detachably engages with the flat engaging surface from a direction orthogonal to the joining bolt. It is better to be formed by a member (Claim 2).

Further, it is preferable to provide a drainage groove for communicating the inside and the outside of the rotating member on the end surface of the rotating member which comes into contact with the joining bolt.

Further, it is preferable that the joining member and the rotating member are made of an aluminum alloy member, and the restraining member and the seat are made of a synthetic resin member (claim 4).

According to the three-dimensional truss member joint of the present invention constructed as described above, since the joining bolt pushing elastic body can be attached and the rotating member can be attached on the outside of the joining member, the joining member of the joining member can be attached. The attachment and the detachment can be facilitated, and the connection between the joint member and the joint fitting can be facilitated (Claim 1).

Further, a flat engaging surface is formed on the opposing outer surface of the non-circular engaging portion of the joining bolt, and the restraining member detachably engages with the flat engaging surface from a direction orthogonal to the joining bolt. The holding member can be easily attached and detached from the direction orthogonal to the joining bolt by forming the holding member (claim 2).

Further, by providing a water drain groove for communicating the inside and the outside of the rotary member on the end surface of the rotary member that comes into contact with the joining bolt, rainwater and dew water entering the rotary metal fitting can be drained from the drain groove. It can be discharged to the outside (claim 3).

Further, since the joining member and the rotating member are made of an aluminum alloy member, and the restraining member and the seat are made of a synthetic resin member, corrosion resistance can be given to the whole and the joining bolt can be provided. It is possible to prevent the dissimilar metals from coming into contact with each other and to prevent the electrolytic corrosion (Claim 4).

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an example of a space truss member joint of the present invention in a connected state. The three-dimensional truss member joint of the present invention includes a joint member 20 having a joint bolt 30 at its end that is screwed into the screw hole 11 provided in the joint fitting 10, and an elastic body that constantly protrudes the joint bolt 30 outward. For example, the coil spring 40 and the joining bolt 3
It is mainly configured by a rotating member 50 that rotates 0.

In this case, the joining member 20 is the pipe-shaped main body 2
1 and an end fitting 22 attached to the end of the pipe-shaped main body 21 by screw connection, and the joining bolt 30 loosens a through hole 23 formed in the center of the end fitting 22. The head portion 31 of the joining bolt 30 penetrates in a fitting shape and the through hole 23
Can be engaged with.

The joining bolt 30 is provided with a non-circular engaging portion 32 having a flat engaging surface 32a on the opposing outer surfaces as shown in FIG. A male screw portion 33 is engraved on the tip portion. Also,
A bifurcated holding member 60 that engages with the flat engagement surface 32a can be detachably engaged with the non-circular engagement portion 32 from a direction orthogonal to the joining bolt 30. As shown in FIGS. 2A and 3, the restraining member 60 prevents the rotation member 50 from rotating outside the pair of inner engaging surfaces 61 that engage with the flat engaging surfaces 32 a of the joining bolt 30. A pair of outer engagement surfaces 62 that are operably engaged. The holding member 60 and the joining member 20 configured as described above
Of the coil spring 4 (see FIG. 4), which is mounted (fitted) in the circumferential groove 24 provided in the peripheral edge of the through hole 23 on the end face of the coil member 4, that is, the end face of the end fitting 22.
0 is contracted so that the joining bolt 30 can always project outward.

As shown in FIGS. 1 and 5, the rotating member 50 is formed in a substantially cylindrical shape so as to cover the restraining member 60 and the coil spring 40, and the inner peripheral surface is provided with opposing portions at opposite positions. A pair of engagement surfaces 51, which are engaged with the outer engagement surface 62 provided on the restraining member 60 so as to be movable only in the axial direction, are provided. On the outer side surface of the rotating member 50, an engaging portion, for example, an engaging groove 5 for engaging a rotating tool (not shown) such as a wrench.
2 is provided, a through hole 53 into which the joining bolt 30 is loosely fitted is provided at one end of the rotating member 50, and the other end, that is, the end surface that abuts the end portion of the joining member 20. A plurality of (in the drawing, four cases are shown) radial drainage grooves 54 that communicate the inside and the outside of the rotating member 50 are provided. In this case, the locking portion is formed by the locking groove 52, but the outer shape of the rotating member 50 may be hexagonal instead of the locking groove 52.

A washer 80 having a spherical surface 81 for contacting the joint fitting 10 is attached to the tip of the rotating member 50 in order to improve the contact with the joint fitting 10 (FIG. 6). reference). On the other hand, for example, as shown in FIG. 7, the joining metal fitting 10 is provided with a plurality of, for example, six screw holes 11 in the radial direction of the outer surface of the hollow spherical metal fitting body 10a.
The joining metal fitting 10 does not necessarily have to be a hollow sphere shape, and may be formed of, for example, a polyhedron.

In order to assemble the three-dimensional truss member joint of the present invention constructed as described above, first, the end fitting 22 in which the joining bolt 30 is loosely fitted is screwed to the end of the joining member 20. Mounting. Next, the receiving seat 70 fitted to the end face of the end fitting 22 on the protruding side of the joining bolt 30, that is, the circumferential groove 24, and the restraining member to be engaged with the non-circular engaging portion 32 provided on the joining bolt 30. Coil spring 4 between 60
0 is attached in a contracted state, and the joint bolt 30 is always in a protruding state by the elastic force of the coil spring 40. Next, the turning member 50 is inserted from the tip end side of the joining bolt 30 to engage the engaging surface 51 of the turning member 50 with the outer engaging surface 62 of the holding member 60, and the turning member 50 holds the holding member. It is sufficient to cover 60 and the coil spring 40.

When the joining metal fitting 10 and the joining member 20 are connected using the space truss member joint thus assembled, first, the washer 80 is attached to the tip end side of the rotating member 50, and then the joining bolt is attached. 30 is a screw hole 11 of the metal fitting 10
Contact. Then, when a turning tool (not shown) such as a wrench is engaged with the locking groove 52 of the turning member 50 to turn, the turning member 50, the holding member 60, and the holding member 60.
Since the engaging bolt and the joining bolt 30 are engaged with each other in a state in which the rotation is blocked, the rotation of the rotating member 50 is prevented from rotating.
To the screw hole 11 of the joining metal fitting 10, and the joining metal fitting 10 and the joining member 20 can be connected.

Even if rainwater or condensed water enters the rotating member 50 through the gap between the connecting member 20 and the rotating member 50 in the state where the connecting member 10 and the connecting member 20 are connected to each other, the rotating member 50 will not rotate. Rainwater or the like collected in the moving member 50 is discharged to the outside through the water drain groove 54.

In the above embodiment, the case where the non-circular engaging portion 32 provided on the joining bolt 30 has the pair of flat engaging surfaces 32a at the opposing portions has been described. It is not necessary to have such a shape, and it may have a hexagonal cross section as long as it has a pair of flat engagement surfaces at least at opposing portions. Further, if the retaining member 60 and the rotating member 50 are engaged so as to be movable only in the axial direction, for example, the rotating member 5
It is also possible to adopt a configuration in which one of the opposing portions of 0 and the suppressing member 60 is provided with a convex strip along the axial direction, and the other is provided with a concave strip slidably fitted to this convex strip. The locking portion provided on the outer surface of the rotating member 50 does not necessarily have to be the locking groove 52, and may be formed by, for example, a flat surface, a polygonal surface, a knurled groove, or the like.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete construction of the constituent members of the space truss member joint of the present invention constructed as described above will be described below. The pipe-shaped main body 21 and the end fitting 22, the joining fitting 10, the rotating member 50 and the washer 80 of the joining member 20 are each formed of an aluminum alloy member. The restraining member 60 and the seat 70 are each made of a synthetic resin member such as nylon resin. The joining bolt 30 is formed of a stainless steel member, and the coil spring 40 is formed of a spring steel member.

As described above, the pipe-shaped main body 21 of the joining member 20, the end fitting 22, the joining fitting 10, and the rotating member 50.
By forming the washer 80 and the aluminum alloy member, it is possible to impart corrosion resistance to the whole. Further, by forming the restraining member 60 and the seat 70 with a synthetic resin member, the joining bolt 30 and the coil spring 40 are formed.
It is possible to prevent the dissimilar metals from coming into contact with the joining member 20 and the rotating member 50 and to prevent electrolytic corrosion.

[0026]

As described above, according to the present invention, since it is configured as described above, the following excellent effects can be obtained.

1) According to the space truss member joint of the first aspect, since the elastic member for pushing out the joining bolt can be attached and the rotating member can be attached on the outer side of the joining member, the joining member is attached and detached. It is possible to facilitate the connection between the joining member and the joining fitting. Therefore, it is possible to improve the efficiency of the assembly work of the structure and the like, and it is possible to improve the maintenance.

2) According to the space truss member joint of the second aspect, flat engaging surfaces are formed on the opposing outer surfaces of the non-circular engaging portions of the joining bolt, and the restraining member is arranged in a direction orthogonal to the joining bolt. Since it is formed of a bifurcated member that removably engages with the flat engagement surface, the restraining member can be easily attached and detached from the direction orthogonal to the joining bolt. In addition to the above 1), Assembling work and maintenance can be improved.

3) According to the space truss member joint of the third aspect, since the drainage groove for communicating the inside and the outside of the rotating member is provided on the end surface of the rotating member that abuts the joining bolt, the inside of the rotating member. It is possible to discharge rainwater or dew condensation water that enters into the outside through the drainage groove, prevent corrosion, and prolong the service life.

4) According to the space truss member joint of claim 4, since the joining member and the rotating member are formed of aluminum alloy members, and the restraining member and the seat are formed of synthetic resin members. It is possible to provide corrosion resistance as a whole, prevent contact between dissimilar metals between the joining bolt and the joining member, prevent electrolytic corrosion, and further increase the life.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a space truss member joint of the present invention.

FIG. 2 is an exploded perspective view (a) and an AA cross-sectional view (b) showing an engagement state of a joining bolt and a pressing member according to the present invention.

FIG. 3 is a front view (a), a plan view (b) and a side view (c) of a holding member.

FIG. 4 is a front view (a) and a BB sectional view (b) of the seat in the present invention.

FIG. 5 is a front view (a) and a sectional view taken along line CC of the rotating member according to the present invention (b).

FIG. 6 is a perspective view (a) and a DD sectional view (b) of the washer in the present invention.

FIG. 7 is a front view showing a cross section of a part of the joining metal fitting according to the present invention.

[Explanation of symbols]

 10 joining metal fitting 11 screw hole 20 joining member 23 through hole 30 joining bolt 31 head part 32 non-circular engaging portion 32a flat engaging surface 40 coil spring (elastic body for pushing out joining bolt) 50 turning member 52 locking groove (engagement) Stop portion) 54 drainage groove 60 restraining member 70 seat

Claims (4)

[Claims] 1. A three-dimensional truss member joint comprising a joining member having a screw hole and a joining member having an end portion with a joining bolt screwed into the screw hole of the joining member. A non-circular engagement portion provided on the protruding side of the joining bolt by loosely fitting the joining bolt in the through hole provided in the portion and engaging the head of the joining bolt with the through hole to project from the joining member. The elastic member for pushing out the joining bolt is contracted between the restraining member that engages with the seat and the seat mounted on the end surface of the joining member, and the turning member having the engaging portion for the turning tool on the outer surface is provided. Forming a substantially tubular shape so as to cover the restraining member and the elastic body by inserting the joining bolt, and fitting the rotating member and the restraining member so as to be movable only in the axial direction. Space truss member joint characterized by. 2. A flat engaging surface is formed on the opposing outer surfaces of the non-circular engaging portion of the joining bolt, and a retaining member is detachably engaged with the flat engaging surface from a direction orthogonal to the joining bolt. The space truss member joint according to claim 1, wherein the space truss member joint is formed of a bifurcated member. 3. The space truss member joint according to claim 1, wherein a drainage groove is provided on an end surface of the rotating member that abuts on the joining bolt so as to communicate the inside and outside of the rotating member. 4. The space truss member according to claim 1, wherein the joining member and the rotating member are made of an aluminum alloy member, and the restraining member and the seat are made of a synthetic resin member. Fittings.