DE830914B - Hooks for spinning preparation machines - Google Patents

Description

(WJGBI. P. 175)

ISSUED FEBRUARY 7, 1952

K ίου I'll 176 H

Paul Früh, Urach

Hackers for spinning machines are used to loosen the fleece from the scraper of cards or carding machines and consist essentially of a hacking tree, from several kammstelzen and from a hacker's comb, which are "firmly connected to each other by Xiete" are. A chipper box with an upstream drive moves the chipper around an axis of rotation of the hacker tree in oscillating movements that have a high frequency. There the swaying masses are relatively large, is the material from which the Kammstelzen and the connecting links /. between the Kammstelzen and the Hackerkamm are made, highly stressed. The consequence of this is that with the previously known. Constructions repeatedly fatigue fractures (so-called fatigue fractures) occur.

It was also researched that the traditional structural design of the hackers, where the Kammstelzenköpfe end in rivets for the Hackerkamm ao, the main cause of the damage Hacker is. Experience has shown that it is made from WerkstoffuikI For reasons of processing technology, it is often not advisable to work on relatively large pieces To attach rivet shafts. Furthermore, rivets should be made of a different material than the one together parts to be connected. Failure to comply with this guideline is still unfavorable Conditions for the worker performing the riveting are added, e.g. B. the eccentric position of the Rivets to the chopper axis, then there is still the risk of riveting errors. If both defects come together, so it comes as no surprise when the hackers occasionally shear off the rivet heads to break.

In the known constructions, the riveting of the chopper comb to the comb stilts is already on cumbersome and time consuming. The projection

Claims (5)

the chopper is resentful The chopper blade is thin and tends to be strained if the work is carried out negligently, which is undesirable and forces subsequent straightening. But once the rivets are torn off as a result of material fatigue, the chopper has to be broken down into its component parts, i.e. H. you have to detach the relevant kestelzen from the hacker's ridge. However, business interruptions and occasionally damage to other machines are always the result of a hacker's failure. The Ernndunigsartikel was created so that these disadvantages are either eliminated or less pronounced. According to the invention, the chopper has screws, clamps, wedges or other means for connecting the chopping comb to the comb stilts, which allow parts of the chopping comb to be replaced without having to use operations that cause permanent deformations on the chopping chamber or the comb stilts when the chopping chimney is replaced . Proceeding from the main feature of the invention, the following measures are also proposed for its configuration: i. Clamping claws with clamping screws are selected as the means for attaching the chipper comb to the comb stilts; 2. the flare comb or a holding piece firmly attached to it have abutments for the clamping claw that run conically to the clamping screw; 3. Dovetail-shaped retaining pieces are used as abutments, which are welded to the chopping comb; 4. the individual clamping claw is loaded by a spring counteracting the clamping screw, preferably a helical spring. Exemplary embodiments are shown in the drawing. Fig. 1 shows a top view of a hacker. Fig. 2 is a side view of the chopper (compared to Fig. Ι on a larger scale), Fig. 3 is a plan view of a section of a chopper (on the scale of Fig. _ '). Fig. 4 shows a cross section through a chipper comb, Fig. 5 shows the rear view of this chipper comb (partial view), Figs. 6 and 7 cross-section and rear view of a construction in which dovetail-shaped holding pieces are used for the chipper comb. which are welded on (spot welded). The chopper driven by the oscillating gear 1 consists essentially of the three parts Hackerbaum 2, Kammstelzen 3 and Hackerkamm 4. On the Hackerkamm 4, the holding pieces 5 are attached, z. B. riveted or welded. The riveting of the holding pieces is easy. The material that is best suited for the particular application can be used for them. If this material is expensive, then this does not matter because the old pieces are only small. For the holding pieces 5 3 bearings are provided in the heads of the Kammstelzen. In these bearings, the clamping claw 6 and the clamping screw> e 7 hold the holding pieces 5 and thus also the chipper comb 4. The helical spring S forms, possibly in conjunction with additional Verdrelisicherungen, a safeguard against automatic loosening of the clamping screw 7. The holding pieces 5 can be rotating parts or prismatic pieces that have dovetail grooves into which the clamping claws hook. The subject of the invention can therefore be dismantled, repaired and reassembled in the machine room of the spinning mill without any component having to be machined to change its shape. if replacement chopper combs are in stock. This storage is possible without great expense, since the chopper combs are much cheaper compared to complete chippers and take up much less space. The chipper tree, which rarely breaks and has a practically unlimited lifespan, does not need to be removed from the machine when the chipper comb is replaced. This is one of the reasons why the replacement of the chopper blade is quicker than the replacement of the chopper blades in the previously known types. PATENT ANALYSIS: 1. Hacker "for spinning preparation machines, consisting of a hacking tree, kammstelzen and hacking comb, characterized by that the chimney with the Kammstelzen by screws. Clamps, wedges or others Means that allow parts of the chipper comb to be replaced without any operations having to apply that cause permanent deformations. 2. Hacker according to claim 1, characterized in that the connecting means consists of clamping claws and turnbuckles exist. 3. Hacker according to claims 1 and 2, characterized characterized in that the chopper comb with abutments tapered to the clamping screw, e.g. round holding pieces for the clamping claw. 4. Hacker according to claims 1 to 3, characterized in that as an abutment dovetail-shaped 11 old pieces use that are welded to the chipper comb. 5. Hacker according to claims 1 to 4, characterized in that the individual clamping claw by a spring counteracting the tensioning screw, preferably a helical spring, is burdened. 1 sheet of drawings © 3058 1. 52