Joints and connections – Branched – Three or more radiating members
Patent
1988-03-29
1989-10-10
Kundrat, Andrew V.
Joints and connections
Branched
Three or more radiating members
403176, F16D 100
Patent
active
048727792
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a device for joining structure members and, more particularly, to a device for assembling a truss structure by easily and tightly joining structure members, such as plural long pipes, to nodes.
BACKGROUND OF THE PRIOR ART
In constructing a large structure, e.g., a large truss, from many structure members such as long steel pipes, each structure member is typically joined to nodes in order to assemble, for example, a truss structure. The typical structure member is joined to polyhedral nodes by bolting at both ends thereof. In Japanese Utility Model Publication of No. 42-22992, a joint device is proposed to form a truss structure. This device is explained as follows: a nut is provided with a hole along a radius thereof and a pin, which is attached to a bolt engaged with the nut, is put into the hole, the bolt is rotated through the pin by rotating the nut. Consequently, the maximum torque that can be applied depends on the strength of the pin and, therefore, it is difficult to tighted the bolt fully when the structure member is joined to the nodes. Moreover, it is impossible to torque fully on the bolt because of holes or hollows that are formed in some structural elements of the joint device. Also, the bolt, which is important in terms of durability, is exposed in part to the atmosphere, hence excess strength and quality of the bolt will be required to ensure durability against atmospheric corrosion.
In Japanese Patent Publication No. 56-29064, a device is disclosed which requires rotation of a bolt through a sleeve covering the bolt. When such a structure member composed of a long structure pipe and edge covers is manufactured, each bolt is fixed to the edge covers welded at the ends of structure pipe. Modifying the length of structure member, determined somewhat by its warp in welding, is impossible and hence the length thereof may be undesirable. If there is failure to absorb such size errors in assembling the truss structure, some of the structure members will not be usable. If a size-adjuster is included in a joint device, the mechanism of the joint device will be very complicated. Furthermore, the opening at the end of the typical structure member is limited with regard to the structural elements of the joint device being small. Therefore, it would be difficult to galvanize homogeneously all surfaces inside and outside of the long structure members and they may corrode.
An object of this invention is to propose a device for joining of structure members in assembling a truss structure by using structure members and nodes.
Another object is to provide a joint structure member to a node tightly, to realize a structure in which bolts do not corrode, to provide an adjustment in order to size a desirable exact length of a structure member, and to provide firm and simple structural elements without holes and hollows.
SUMMARY OF THE INVENTION
This invention relates to a device for joining or connecting an end of an elongate pipe-like structure member that has an internally threaded end ending at a first contact surface to a connector node that has an internally threaded aperture ending at the second contact surface. The device includes a bolt with oppositely threaded end portions, one of which is adapted to engage directly with the threaded aperture of the node and, intermediate between the threaded portions, a cylindrical portion and a torque transmitting portion. An annular cylindrical bolt support member having an internal bore adapted to slidingly receive therethrough the other threaded portion and a cylindrical portion of the bolt is externally threaded to engage with the internal threads of the structure member end. A nut means engaging the threaded portion that passes through the bolt support member is provided and is large enough to prevent the bolt from slipping out when the nut means is applied. A sleeve member is disposed around the bolt member and has an internal bore adapted to slidingly receive the torque transmitting portion of
REFERENCES:
patent: 4664550 (1987-05-01), Jachmann
Kawatetsu Kenzai Kogyo Kabushiki Kaisha
Kundrat Andrew V.
LandOfFree
Joint device of structure member does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Joint device of structure member, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Joint device of structure member will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1953821