US 5,291,657 AGranted

Shearing machine for steel material

AssigneeOhyodo Diesel Co., Ltd.

InventorsSumio Morikawa, Toshiji Ohga, Masahiro Kondoh

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Abstract

A shearing machine is provided. The machine comprises a lower stationary jaw detachably mounted on one end of an arm of a working machine for rotatable and tiltable movement, the lower stationary jaw having attached thereto a plurality of shearing blades, an upper movable jaw having a plurality of shearing blades adapted to be opened and closed in a scissors-like manner relative to the shearing blades of the lower stationary jaw so as to shear an article to be sheared, and a hydraulic cylinder for pivotally moving the upper movable jaw. The forward-end shearing blade of the lower stationary jaw and the forward-end shearing blade of the upper movable jaw are arranged in a staggered or angled manner relative to their respective adjacent shearing blades of the lower and upper jaws, respectively, so that the forward-end shearing blades of the lower and upper jaws, respectively, may be first engaged with each other, when moved in a vertical direction.

Claims5

Dependent claims

A shearing blade configuration for shearing machine jaws comprising:

an upper shearing blade assembly including
(a) a forward blade disposed in a first vertical plane;
(b) at least one rearward blade having its cutting surface located contiguous with the cutting surface of the forward blade, and disposed in a second vertical plane parallel to the first plane, the blades positioned in laterally stepped relation;
(c) the forward and rearward blades forming an obtuse angle therebetween;
a lower shearing blade assembly including
(d) a forward blade disposed in a third vertical plane, parallel to the first and second planes;
(e) at least one rearward blade having its cutting surface located contiguous with the cutting surface of the lower forward blade, and disposed in a fourth vertical plane parallel to the first, second and third planes, the lower blades positioned in laterally stepped relation;
(f) the lower forward and rearward blades forming an obtuse angle therebetween to ensure closure of the forward upper and lower blades before the rearward upper and lower blades;
the forward blades and the rearward blades having corresponding lateral surfaces in contact with one another upon closure of the jaws for interlocking the jaws and preventing their lateral separation.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/115,786Filed 3 Sep 1993 · continuation
Priority: JP 4-27256312 Oct 1992
Granted: 8 Mar 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

E02F 3/965
With arrangements for alternate or simultaneous use of different digging elements: of metal-cutting or concrete-crushing implements
B23D 17/00
Shearing machines or shearing devices cutting by blades pivoted on a single
B23D 35/001
Tools for shearing machines or shearing devices; Holders or chucks for shearing tools: cutting members
E04G 23/08
Working measures on existing buildings,: wrecking of buildings