DEVICE FOR CUTTING AND DECOMPOSITION

Abstract: A mobile junk scrap shears has a bracket connectable to an arm of a digging machine or the like and supporting a cutting and shearing device having two mutually aligned cutting means (6, 7) from which one is stationary and the other one is movable by means of a hydraulic cylinder or the like (14). Arrangements are made for adjusting the cutting means such that the points thereof substantially contact each other but do not overlap each other in the end position.

Description: DEVICE FOR CUTTING AND DECOMPOSITION This invention refers to a device for cutting and decomposition of primarily junk such as reinforcement bars, steel beams, angle irons, shafts and materials from demolitions and scrapping of machines and plants. More particularly the invention refers to a device of the above-mentio character, which is mounted upon a movable arm of a digging machine or similar working machine such that the decomposition may take place wit hout transportation of the material to be demolished to the device. Devices of this kind are previously known. They are however affected with a plurality of drawbacks. They are for instance relatively heavy which primarily depends upon the fact that the cutting elements durin the cutting or shearing operation pass beyond each other which makes i necessary to arrange dollies to prevent that the material to be cut ra and thus tends to pry the cutting elements out of each other. They are further relatively expensive to manufacture and owing to the necessary heavy dimensioning and the presence of dollies and guides for the side ways displaced cutting means the cutting or shearing unit will be so bulky that it will be difficult for it to penetrate into a mass of jun respectively to grab components which are located in narrow spaces and the 1 ike. The primary object of the invention thus has been to overcome these drawbacks and to create a device which combines a light weight with a sturdy and ductile construction and further offers a good accessibilit in order to accomplish these and further objects the invention has the characteristics of the patent claims. In the accompanying drawing an exemplifying embodiment of the inventio is illustrated and Fig. 1 shows the device schematically and in a front view whereas Fig. 2 is a section along l l-ll of fig. 1 Fig. 3 is a cross section through a somewhat modified device and Fig. -ι finally shows a detail of the device according to fig. 3 on a bigger scale. The illustrated device comprises a cutting- or shearing unit, generally designated 1, which has a bracket 2 for detachable attachment to the fre end of a lifting arm of a working machine such as a digging machine. Con nected to the bracket is a stationary part 3 > which comprises two side¬ ways spaced apart, mutually parallell walls or lugs 3a,3b between which is provided an arm k , which by means of a shaft 5 extending through the arm and the walls 3a,3b is pivotal ly mount in relation to the stationary part. A hydraulic cylinder 6, which is po¬ wered from the working machine at 7 is pivotal ly connected to the statio nary part 3 of the cutting unit and the plunger 8 thereof is by means of a shaft 9 pivoted to an intermediate member 10, which is connected to th arm k in such a manner that the distance between said intermediate mem- ber and the arms may be varied. The stationary part 3 and the arm h each support a cutting means 11a re¬ spectively lib. These cutting means are as appears from fig. 2 in the shape of in section triangular elements having their points facing each other and so aligned that said points will be situated in the same plan such that they in the final position may contact each other. The cutting means 11a,11b are secured to the stationary part 3 respectively to the pivotable arm k via shims 12a respectively 12b which in addition to the adjustability between the arm k and the shims 9 makes it possible to ad¬ just the cutting means also after wear such that they in the final posi- tion thereof will have the points parallell and in contact with each oth Other shims 13a, 13b are further provided to guarantee the proper alignme of the cutting elements 11a,11b relative to each other such that their points will move towards each other in the same plane. It is apparent that the device now described functions in such a manner that the cutting or shearing unit by aid of the working machine and the lifting arm thereof is moved to the object which is to be demolished wit the arm U raised such that the reinforcement bar or the like to be cut is located between the cutting elements. When the hydraulic cylinder 6 then is operated to swing the arm in the direction of the arrow in fig 1 the cutting elements will successively approach each other and pene¬ trate into the object to be cut. When the points of the cutting elements suostantlal ly have come into contact with each other the object to be cut falls apart and the cutting operation is carried out. In fig.3 and k a somewhat modified device for adjusting the cutting means 11a, 11b is illustrated. Here the shims 13a, 13b are substituted by adjustment plates 1 a, 1-4b which are recessed in the walls 3a,3b and which may be displaced by means of set screws 15 which are threaded thr threaded holes in the walls 3a,3b. (see in particular fig. k which show the actual part on a bigger scale). The adjustment plates are preferabl cylindrical and guiding columns may be provided or other kinds of arran ments taken to prevent turning of the plates. Since the adjustment plat only act upon one of the cutting means it is obvious that an adjustment this means takes place by screwing out a little bit the set screws at t side towards which the cutting means is to be displaced and screwed in at the opposite side until the desired displacement has been obtained, whereupon the latter is secured thereby that the set screws which have been loosened are again tighted.

Claims: CLAIMS 1. Device for cutting or decomposition of junks, reinforcement bars and similar objects and comprising a cutting or shearing unit (1) con¬ nectable to the lifting arm of a digging machine or similar working machine, c h a r a c t e r i z e d in that the cutting or shearing unit (1) comprises in section substantially triangular from respec¬ tively towards each other movable cutting elements (11a,11b) which are so orientated and guided that the points thereof face each other with said points located in a plane coinciding with the intended cut. 2. Device according to claim 1, c h a r a c t e r i z e d in that one of the cutting elements (11a) is supported by a stationary part (3) of the cutting unit whereas the other cutting element (11b) is sup¬ ported by an arm {k) pivotable in relation to the stationary part, said arm being operated by means of a hydraulic cylinder (6) provided intermediate said stationary part (3) and the arm {k) and that shims (12a, 12b) are provided between the cutting elements (11a,11b) and the stationary part (3) respectively the arm (< *■ ) for adjusting the cutting elements to paral lei 1 ism. 3. Device according to claim 1, c h a r a c t e r i z e d in that shims (13a, 13b) are provided at both sides of cutting elements (11a, 11b) for their alignment sideways in relation to each other. k. Device according to claims 1-3 inclusive, c h a r a c t e r i z e d in that the plunger (8) of the hydraulic cylinder (6) is connected to the arm ( ) via an intermediate means (10), by means of which the dis- tance between the plunger (8) and the arm (4) may be varied. 5. Device according to claϊm l, c h a r a c t e r i z e d in that one of the cutting elements (11a) is supported by a stationary part (3) of the cutting unit while the other cutting element (11b) is supported by means of an arm {k) which is pivotal ly mounted relative to the stat- ioπary part and which is pivoted between sideways spaced apart mutually parallell raised portions (3a,3b) of the stationary part (3), that said raised portions in the sides thereof which face each other have recesse each for receiving an adjustment plate (l a,T4b) and that further said raised portions have threaded holes through which are threaded set screws (15) for the displacement of the adjustment plates in direc¬ tion towards each other respectively away from each other.

Inventors: BLOM KURT, BLOM, KURT
Applicants: BLOM KURT, BLOM, KURT
Application year: 1985
Main classification: B23D31
IPC codes: B23D17, E02F3