US 3,977,804 AGranted

Multiple spindle drilling machine for wide flange beams

AssigneeMiyakawa Industry Co., Ltd.

InventorToshikatsu Kitagawa

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Abstract

A multiple spindle drilling machine can simultaneously drill a plurality of bores for inserting the rivets or the bolts through the web and a pair of flanges of wide flange beams which are used in building and construction by a first, second and third drilling assembly. A supporting device mounted on the upper side of a machine table which stops the wide flange beam is fed by a feeding device thereon and supports it at a predetermined drilling position. The first drilling assembly is mounted so as to be movable toward the vertical direction from the upper position of the machine table and has multi-drills for drilling a plurality of bores through the web of the wide flange beam. The second and third drilling assemblies are mounted so as to be movable toward the horizontal direction from both of the side positions of the machine table and have multi-drills for drilling a plurality of bores through both flanges of the wide flange beam.

Claims10

Dependent claims

A multiple spindle drilling machine comprising a machine table having a supporting device on the upper side thereof for supporting a wide flange beam, feeding means positioned in front of said machine table for feeding a wide flange beam on said supporting device;

first drilling means positioned so as to be moveable toward the web of a wide flange beam on said supporting device from the upper position of said machine table and having multi-drills for drilling a plurality of bores through the web;
second and third drilling means positioned so as to be simultaneously moveable with said first drilling means toward a pair of flanges of a wide flange beam from both side positions of said machine table and having multi-drills for drilling a plurality of bores through the flange;
and stopping means for stopping a wide flange beam fed on said supporting device by said feeding means at the predetermined drilling position, said stopping means including a stop member adapted to contact with the end portin of the wide flange beam for stopping the wide flange beam without moving over the predetermined drilling position and a switch member adapted to engage with the end portion of the wide flange beam for changing said feeding means under the static condition.

Dependencies are inferred from the claim text.

Facts

Application: 05/554,921Filed 3 Mar 1975
Priority: JA 49-249283 Mar 1974
Granted: 31 Aug 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B23B 39/16
General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines: drilling machines with a plurality of…
B23B 41/003
Boring or drilling machines or devices specially adapted for particular work ; Accessories specially adapted therefor: for drilling elongated…
Y10T 408/21
Cutting by use of rotating axially moving tool: with signal, indicator, illuminator or optical means
Y10T 408/3788
Coaxial, opposed tools: plural pairs of coaxial, opposed tools