DE2806828A1 - GUIDE FOR SCREW CHAINS - Google Patents

Description

Applicant machine factory

Korfmann GmbH Dortmunder Strasse 3 6 5810 Witten / Ruhr

Designation: Guide for cutting chains

The invention relates to a guide for cutting chains, consisting from one behind the other on the circumference of a cutting arm, essentially H-shaped in cross-section Guide strips with an outwardly open, U-shaped guide profile to accommodate the circulating inclined chain and with it for attachment to a guide beam of the Schrämann inwardly extending legs.

From the DT-PS 1 210 395 of the applicant is a guide known for cutting chains of the above type, in which the individual guide strips either in one piece or in several pieces, in each case with a fixed width of the opening of the U-shaped guide profile o If the The inclined chain is used, for example, to cut rocks containing silicate or quartz, are the lateral ones

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Guide surfaces of each guide rail are exposed to high pressure and correspondingly high wear. The wear effect is reinforced by the fact that the cutting chain links are gas nitrided and thus harder than the ones only fully hardened guide surfaces of the guide rails. The wear of the lateral guide surfaces has an undesirable effect Inclination of the cutting chain within the guide result. The Schrämkette "runs", that is to say the The course of the cut becomes oblique, so that a repair is inevitable. In this case, they must be worn out affected guide strips are replaced as a whole. Other measures to restore a suitable Guide without replacing the expensive guide strips, for example attempts to remove the wear points by a Restoring material application have not proven their worth. There is therefore the task of a guide for cutting chains with low susceptibility to wear and with the possibility of creating better than wear and tear that occurs to be able to counteract this so far.

According to the invention this object is achieved in that the Guide bar is divided continuously in the longitudinal direction such that the bar parts in the width direction to each other are attached to the guide support such that they can be spaced apart.

This inventive solution is the U-shaped Guide profile of the guide strips granted an opening width that can be adapted to requirements. In that the last parts are attached to the guide support so that they can be spaced apart from one another in the width direction, the opening width Slightly readjust the guide profile as soon as there is slight wear on the lateral guide surfaces shows, which can lead to an oblique cut of the cutting chain.

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According to a further development of the invention, the division runs the guide bar in the form of a parting line through the central web of the H-shaped guide bar, and between the inwardly extending legs and the guide carrier are inserted spacer plates. If the lateral guide surfaces of the U-shaped guide profile occurs, the initially used spacer plates are replaced by those of a correspondingly smaller thickness, see above that the original opening width of the guide profile is restored. The parting line in the center bar of the guide bar allows this adjustment.

From the above it is already apparent that this wear-compensating measures at the place of use Cutting machine can be carried out without special special tools. There is no need for extensive storage for costly replacement guide rails, because instead of the previous replacement of those that have become unusable due to wear and tear Guide strips only require adjustment.

In order to simplify the adjustment even further, is according to the invention provided that the spacer plates are multilayered and the individual layers slightly apart are solvable. Spacer plates made of brass or steel are preferably used for this purpose the trade name Laminum are available.

It has been shown that when the invention is used, the service life of the guide strips can be more than doubled. This not only means considerable savings by reducing the consumption of expensive guide rails, but also the guide, which can be easily adjusted when wear and tear occurs

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the cutting chain avoids longer machine downtimes and operating states due to wear and tear Chain guide that has become inadequate is neither beneficial for the cutting machine nor for the cut that can be achieved are.

Suitably, the leg on the sides of a centrally extending at the periphery of the guide carrier web can be applied and screwed _t to a clear identification and easy assembly of the two halves of the guide strip to reach the guide carrier.

An embodiment of the invention is described below with Referring to the drawing explained in more detail. In the drawing show:

FIG. 1: a side view of a cutting arm;

FIG. 2: a sectional view of a cutting chain running in a guide in a cutting gap;

FIG. 3: a side view of FIG. 2.

A cantilever arm shown in Figure 1 has a guide beam run as a cantilever plate, on the catch of which individual guide strips 2 are detachably fastened directly adjacent to one another and form a guide for a cantilever chain 5, which runs at the ends of the cantilever arm over a drive sprocket 3 or a pulley 4 . The cutting arm including reinforcement plates 6 is attached to a cutting machine, not shown.

Chain links 7 of the inclined chain 5, which are equipped with cutting elements 8, are conveyed in an outwardly open U-shaped guide profile 9 of the cross-section (compare FIG. 2)

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shaped guide strips 2 out. Each guide bar 2 is continuous in the longitudinal direction in two bar parts 2a, 2b divided, which are opposite each other with the release of a parting line 17.

Inwardly facing legs 10 a, 10 b of the guide bar 2 are by means of screws 11 on a central web 16 of the Guide support 1 releasably attached in the manner shown in FIG. The screws 11 each extend through a conical bore 12 in which the screw head rests, in the leg 10 a and through a bore 14 in the web 16 into a threaded hole 13 in the leg 10 b.

Between the legs 10 a, 10 b and the web 16 spacer plates 15 are arranged, by means of which the opening width of the guide profile 9 can be adapted to the respective requirements. Those that can be easily separated from one another Layers of existing spacer plates 15, which initially have a thickness of about 1 mm with an opening width of about 22 mm of the guide profile 9, while the parting line 17 is about 2 mm wide, are mainly used to support the strip parts 2a, 2b, namely to restore the original opening width of the guide profile 9, if wear is found on the sides of the guide profile 9, which leads to an undesirably large amount of play between the chain links 7 and the guide profile 9. To readjust the screws 11 of the guide bar 2 are loosened and one or more layers of the spacer plates 15 are loosened removed in order to compensate for the wear and tear that has occurred and the original opening width of the guide profile 9 restore. As soon as the strip parts 2a, 2b are screwed tightly again, the cutting arm 1 is in the kerf S can be re-used without the inclined chain 5 being able to deviate from the desired straight-line stability.

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The plane of division of the guide members 2 does not necessarily have to be run in the middle. It is also possible, for example, the central web of the H-shaped guide members 2 to the to assign left or right strip part 2a or 2b and the middle bar at a corresponding distance in front of the other To let the strip part end in order to form the necessary variable parting line. Essential for the construction and execution is only that the inclined chain 5 is given a safe and adaptable guide in the event of wear with guide links that can be easily and securely attached to the guide beam 1, preferably screw it in place.

909834/0261

Claims (4)

Applicant: Maschinenfabrik Korfr.iar.n GmbH Dortmunder Straße 3 6, 5810 Witten / Ruhr Description: Guide for cutting chains Patent claims 1. Guide for cutting chains, consisting of one on the circumference Schrämarms cascaded ,, in cross section Essentially H-shaped guide strips with an outwardly open, U-shaped guide profile for receiving the circulating cutting chain and with it for attachment to a guide support of the cutting arm internally extending legs, characterized in that the guide strip (2) in the longitudinal direction is continuously divided in such a way that the strip parts (2a, 2b) can be spaced apart from one another in the width direction can be attached to the guide beam (1). 2. Guide according to claim 1, characterized in that the division in the form of a parting line (17) runs through the central web of the H-shaped guide bar (2) and between the inwardly extending ones Legs (10 a, 10 b) and the guide bracket (1) spacer plates (15) are inserted. 3. Guide according to claim 2, characterized in that the spacer plates (15) are multilayered and the individual layers are easily detachable from one another. ORIGINAL INSPECTED 909834/0281 4. Guide according to one of the preceding claims, characterized characterized in that the legs (10 a, 10 b) on the sides of a center on the circumference of the Guide support (1) extending web (16) can be placed and screwed. 909834/0261