Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Three-dimensional space-defining
Reexamination Certificate
1999-06-18
2001-04-10
Kent, Christopher T. (Department: 3635)
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Three-dimensional space-defining
C052S653100, C052S745190, C052S081300, C029S897312, C403S169000, C403S180000, C403S218000
Reexamination Certificate
active
06212847
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to cross-shaped, T-shaped, straight and straight-curved connecting members being used when assembling or fabricating a swimming pool, parapets, vinyl houses, etc, and method for manufacturing the same.
2. Description of Related Art
When the swimming pool, parapets and vinyl houses are assembled or fabricated as simplified facilities, pipe frames are used as foundation means or support means of a tent. This support means connects a plurality of frames in various directions to form roofs and sides of a structure. At this time, a predetermined connecting means is required to connect the frames.
The connecting means forms a connecting opening into which the pipe frame is inserted. A straight connecting member is used for connecting two frames linearly. A straight-curved connecting member is used for treating curved portions such as a roof, and a T-shaped connecting member is adopted for connecting frames vertically and horizontally in three directions, and also a cross-shaped connecting member is necessary for forming a central support framework.
The connecting members should be made to fit into respective connecting sections prior to construction work. These connecting members are generally molded with a molding material such as synthetic resins. Such a connecting member made from the synthetic resins has a drawback that frame-connected sections are easily broken down due to heavy load of frames. To improve this drawback, the connecting member made from a metal material has been proposed, but also has defects including complicated producing method, considerable load and expensive producing cost.
Furthermore, there has been attempted a combined connecting member in which a connected section is only manufactured with a metal pipe and a connecting part is made from the synthetic resins. However, this combination also includes problems to cause complicated manufacturing facilities and process for combination with the metal material and the synthetic resins, to contain difficulty in installing the manufacturing facilities, and to incur expensive producing cost.
Accordingly, the connecting member is required to have a simplified structure that the connecting parts are made with the metal material and a fixed part disposed between the connecting parts is formed with the synthetic resins, and also it is needed that a manufacturing method therefor is simplified by molding.
SUMMARY OF THE INVENTION
Therefore, to solve the above problems, it is an object of the present invention to provide a connecting member which includes a fixed part made from a synthetic resin and connecting parts made from a metal material.
Another object of the present invention is to provide a method for manufacturing a frame-connecting member by combination between the molding of a synthetic resin and a frame support of a metal material.
To accomplish one object of the present invention, there is provided a frame-connecting member, comprising:
a first connecting part, having a metal pipe shape, for connecting a frame of a first direction; a second connecting part, having a metal pipe shape and corresponding to the first connecting part, for connecting a frame of a second direction; and a fixed part, placed between the first connecting part and the second connecting part and molded with the molding material of a synthetic resin, for connecting the connecting parts.
The present invention manufactures a T-shaped fixed part forming a third connecting part extending vertically to any one of upper and lower vertical directions, and a cross-shaped fixed part forming third and fourth connecting parts extending respectively to the upper and lower vertical directions.
To accomplish another object of the present invention, there is provided a method for manufacturing a frame-connecting member, the method comprising the steps of:
(a) forming a hole vertically passing at approximately the center of a linear pipe member;
(b) disposing an upper molding frame having an inlet above the hole and a lower molding frame corresponding to the upper molding frame below the hole, in order to form a fixed part at an outer circumference of the pipe member having the hole;
(c) introducing a molding material into the fixed part to form the first and second connecting parts from the pipe member; and
(d) releasing the upper and lower molding frames from the fixed part to which the first and second connecting parts are associated after the introduced molding material is solidified;
(e) forming a connecting groove made along the hole in order to reinforce the fixed part, between the steps of (a) and (b); and
(f) inserting rods into the opposedly-placed first and second connecting parts at a predetermined interval from inner circumferential surfaces thereof, between the steps of (b) and (c).
The frame-connecting member according to the present invention provides a straight connecting member having two-way connecting holes into which common pipe frames are inserted, a straight-curved connecting member for a curved two-way connected section, a three-way connecting member for a three-way connected section, and a four-way connecting member for a four-way connected section, respectively.
Accordingly, the present invention provides a simplified frame manufacturing method, overcoming a defect that the connecting member obtained by the molding of the synthetic resin is frequently broken down.
Also, the present invention is characterized by providing a frame-connecting member in which a fixed part made from the synthetic resin and connecting parts made from the metal material are incorporated, and providing a method for manufacturing the frame-connecting member by the molding of the synthetic resin and a frame support of the metal material.
REFERENCES:
patent: 5518333 (1996-05-01), Cienkus, Jr. et al.
patent: 5944441 (1999-08-01), Schutze
patent: 6000175 (1999-12-01), Gale et al.
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