PT98392A - Cutting member with disposable knives for woody-waste destroyer - Google Patents

Abstract

Cutting member comprising support means with circular surround, defining, together with a casing sheath 1 and a gripping piece 2, the housing for each disposable knife 3, which has at least one cutting edge 10, mounted on the periphery of the said support means T and, between the said sheath 1 and the gripping piece 2, a disposable knife 3 together with the wedge 4, the base 5 of the gripping piece 4 having the configuration of a rule which is guided in a slot 6, the gripping piece 2 being guided in relation to the sheath 1 and held radially in relation to the support means, gripping and release of the knife 3 with the respective wedge 4 being achieved by means of a screw 7 which passes freely through the sheath 1 and is screwed into a threaded hole provided in the gripping piece 3. The present invention is applicable, for example, to the wood-extraction industry. <IMAGE>

Description

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MBIORY ..... DESC.RIl.iyA Type ..... of the ..... Invention

This invention relates to a cutting member for a wood waste

BACKGROUND OF THE INVENTION Various types of wood destroyers in logs and wood waste of various brands and origins are known in the market. In general, these destroyers, whether in the case of disc or disc destroyers, use special treated steel tappets and rectified * that at the end of a variable period of time of use have to be disassembled and sharpened »

This affliction is normally performed in the knife sets simultaneously because of the need to keep all knives of the same size for reasons of dynamic balance of the rotor where they are assembled. This requires the use of flat rectifier mounting devices. where their sharpening and the availability of these machines with the appropriate characteristics are performed. On the other hand, the wear or fracture of the edges of the knives of the same game is not uniform and, in order to respect the above-mentioned equilibrium condition, need to trim a whole set up to a point where the knives have perfect continuous edges * which leads to a longer use of the rectifier and reduces the number of possible uses of each set of knives »All of this results in increased costs of sharpening * which in itself is an onerous operation »

Moreover, when wrecking is being carried out in the forest * especially in locations away from population centers * the machine must be accompanied by several sets of ever-sharp sharp knives * and be transported to the sharpening and return workshop to the workplace * which is often very difficult * because the flat rectifiers required to carry out the grinding operation are not readily available, even in urban centers with some Importance »

Qbleçtlyo ..... of the invention

Accordingly, it is the object of the present invention to provide a cutting member for a wood waste destroyer which obviates the aforementioned disadvantages and reduces the costs with respect to the boards and their edges.

According to the invention, this object is attained by the use of disposable knives of very small dimensions, with two edges, which, once both edges are used, are decaffeinated, a new set of knives being assembled in the shredder. In particular, the so-called mouths which are frequently found on the edges of the knives, which are caused by their impact on hard objects (metals, stones, etc.), which do not reach all the knives, but can premature replacement of a game, do not prevent the use of the still-edged edges of the remaining knives of a game »

These knives, in that they do not show dimensional changes, may be encompassed in new sets or preferably integrate groups of knives with identical problems allowing a fullest possible exploitation of each knife. The adoption of the fundamental principle of the present invention leads to the design of tightening members of the knives with a configuration suitable for simple and correct assembly of the knives and their secure tightening, as hereinafter referred to '

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood from the following description of a preferred embodiment thereof given by way of non-limiting example with reference to the accompanying drawing in which π

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The figure shows in partial longitudinal section a wrecker, where a drum is mounted in which the inserts of the assembly and tightening device are used in accordance with the present invention.

Description of the invention

Referring to the figure * in which the drum T is shown, which shows * for the housing of each disposable knife 3 * a mantle mantle 1 and a clamping piece 2. At the periphery of the drum T * and between said mantle 1 and the clamping part 2 is disposed the disposable knife 3 together with the shim 4 The base 5 of the clamping part 4 has the configuration of a ruler which is guided in a slot 6 seen in the mantle mantle Ia where (1a) is housed in a second disposable knife 3a with the respective shims 4a and the clamping part 2a. Thus, the clamping part 2 (or 2a) is guided relative to the cover 1 (or 1a) and locked radially with respect to the drum The tightening and loosening of the knife 3 with the respective shim 4 is effected by means of a screw 7, not shown, which passes freely through the cover 1 and is screwed into a threaded hole provided in the clamping part 3. The correct positioning of the knife and its shim is ensured by the wait for a bis abutment 8 of the assembly * realized by the knife 3 and chock 4 along the entire wall 9 * provided in the clamping part 3, the chock 4 is made of hardened and rectified steel and is intended to ensure a more resistant bearing base of the than that of the drum sheath * and does not suffer wear or irregularities * that the edge 10 thereof will inevitably suffer * as a consequence * of use of the destroyer »

As an alternative to the knife set 3 and wedge 4 * the latter may itself constitute a knife '

The knives 3 have two bevelled edges * at the appropriate angle to the cutting conditions of the material to be destroyed * and * as

72 050 03 / ic can be seen through the drawing, can be used twice rotating them by 180 °. The setting of the clearance between knife 3 and counter-knife 11 is, by the configuration imparted to knife 3, to the shim 4 and the clamping part 2, automatically secured by the abutment of the bevel 8 on the surface 9 of the clamping part 2, however, the clearance varies according to the conveniences, by adjusting the position of the counter-knife 11, which is effected in the conventional manner-

While the invention has been described in correlation with the drawing, wherein a cutter equipped with a 4-knife drum is shown, the number of the knives may be any, and also as will be apparent to those skilled in the art, rather than a drum may use a cutting disc without departing from the scope of the invention-

Claims (1)

(1) and a clamping piece (2) are provided in the form of a cover plate (1) and a clamping member the housing of each disposable knife (3) having at least one edge (10), which are mounted on the periphery of said support means (T) and between said cover (1) and clamping piece (2 a disposable knife 3 together with the shim 4, the base 5 of the clamping piece 4 being in the form of a ruler which is guided in a slot 6, the clamping piece 2 being fixed, guided in relation to the cover 1 and locked radially with respect to the support means, the knife 3 being tightened and loosened with the respective cover 4 by means of a screw 7, which passes freely through the cover ( 1) and if it is screwed into a threaded bore provided in the clamping piece (3) of the cutting member according to claim 1, (8) of the assembly made by the knife (3) and chock (4) along the entire wall (9) provided in the clamping part (3) of the knife ) " The cutter according to claim 1 or 2, characterized in that the wedge (4) is intended to provide a support base which is more resistant than that of said cover (1) and does not suffer from wear or irregularities which the (10) of it will inevitably suffer. The cutting member according to claim 1, 2 or 3, characterized in that the knife and blade assembly (3) is formed in one piece. The cutter according to any one of the preceding claims, characterized in that the knives (3) have two bevelled edges at a suitable angle to the cutting conditions of the material to be shredded and can be used twice rotatably. The cutter according to any one of the preceding claims, characterized in that the adjustment of the clearance between the knife (3) and the counter-knife (11) due to the configuration given to the knife 3, the shim 4 and the clamping part 2, which is automatically secured by the abutment of the bevel 8 on the surface 9 of the clamping part 2, in accordance with the conveniences of the recess and the position of the counter-knife (11) 'U Lisboa, By TECNITOOLS - TECHNICAL COMPANY AND MOLDS, CUNHOS AND CORTANTES, LDA' = 0 OFFICIAL AGENT- 1