Method of manufacturing a reinforcing bar cage and apparatus for manufacturing the same
AssigneesMatsumura-Gumi Corporation, Daiichi Unyusagyo Co. Ltd.
InventorsHideo Isono, Takeshi Okabe
Life of this patent
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Abstract
A method of manufacturing a reinforcing bar cage, which is used in a cast-in-place piling method of constructing a reinforced concrete pile for a structure, and an apparatus for manufacturing the same, which allow simple and easy manufacturing of a reinforcing bar cage having an intended cage strength. A hoop is disposed, e.g., spirally with respect to cylindrically arranged main reinforcements, connection between the main reinforcements and the hoop is made by welding crossed portions thereof, and, in connection with the welding, the crossed portions are heated to achieve an intended strength of the reinforcing bar cage.
Claims18
A method of manufacturing a reinforcing bar cage comprising the steps of arranging longitudinally extending main reinforcements in a cylindrical form, arranging and connecting a hoop to said cylindrically arranged main reinforcements by welding crossed portions of said main reinforcements and said hoop, and additionally heating said crossed portions by gas combustion heating to prevent hardening and reduction of extensibility of said welded crossed portions.
A method of manufacturing a reinforcing bar cage comprising the steps of arranging longitudinally extending main reinforcements in a cylindrical form;
- moving a group of said main reinforcements in a longitudinal direction of the main reinforcements while rotating said group in a predetermined direction, and supplying a continuous hoop to said group of said moving and rotating main reinforcements for spirally winding said hoop around said group;
- successively welding crossed portions of said hoop and said main reinforcements with a welding device which confronts said group of said main reinforcements, which welding device can rotate a predetermined angle from a predetermined position in the same direction as said group of said main reinforcements and can return to said predetermined position;
- and additionally heating said crossed portions by a gas combustion heating device which is disposed near said welding device and can reciprocatively rotate in said same direction as said welding device.
An apparatus for manufacturing a reinforcing bar cage comprising:
- a device for supplying longitudinally extending main reinforcements;
- a main reinforcement supporting and rotating device for cylindrically arranging and supporting said main reinforcements supplied from said main reinforcement supplying device, and rotating a group of said supported main reinforcements while allowing movement of said group of said main reinforcements in a longitudinal direction of said main reinforcements;
- a main reinforcement pull-out device for pulling out said group of said main reinforcements supported by said main reinforcement supporting and rotating device from the main reinforcement supporting and rotating device by moving said main reinforcement group in said longitudinal direction while holding an end of said main reinforcement group and rotating the same together with said main reinforcement supporting and rotating device;
- a hoop supplying device for supplying a continuous hoop to said main reinforcement group which is supported by said main reinforcement supporting and rotating device and said main reinforcement pull-out device and is being rotated and pulled out from said main reinforcement supporting and rotating device;
- a hoop pushing device which confronts said main reinforcement group supported by said main reinforcement supporting and rotating device, can rotate a predetermined angle in the same direction as said main reinforcement group from a predetermined position, which pushing device can return to said predetermined position, and is operable to push said hoop supplied from said hoop supplying device against an outer surface of said main reinforcement group;
- a welding device which confronts said main reinforcement group supported by said main reinforcement supporting and rotating device, can rotate a predetermined angle in the same direction as said main reinforcement group from a predetermined position, which welding device can return to said predetermined position, and is operable to weld crossed portions of said main reinforcements and said hoop pushed against said main reinforcement group by said hoop pushing device;
- and
- a gas combustion additional heating device which is disposed adjacent said welding device, which additional heating device can reciprocate in the same direction as said welding device, and is operable to additionally heat said crossed portions of said hoop and said main reinforcements in connection with said welding.
Dependencies are inferred from the claim text.