DE2830429A1 - Cable clamp suitable for sailing boats - has cable inserted between two sloping toothed rollers with sliding clamping action - Google Patents

Abstract

The cable clamping device has a V-shaped base plate (10) with two sloping lugs (13) at the wide end and two smaller sloping lugs (12) at the narrow end, supporting two spindles (15) between them. Each spindle carries a clamping roller (18, 19) which has a rear sleeved part (23) and a larger diameter headed part (20, 21). Each head has a series of circular gripping teeth (22) around it. When a cable (26) is inserted between the clamping rollers, it can be rotated to assist the teeth to embed in the cable, and tension towards the narrow end of the device results in a clamping action, due to the angle of the spindles.

Description

Clamp with toothed ones running on rigid axles

roll The invention relates to a new sheet clamp for sailboats, which is characterized in that the clamping device by on Rigid axles displaceable in the longitudinal direction, toothed ones freely rotatable about the axles Roles is formed.

The job of the sheet clamps is to hold the sheet (= line of a sailing boat, which regulates the angle at which the sail is set relative to the wind). It is important that the sheet is quickly released from the clamp in the event of danger can.

In stormy wind conditions, one sheet is often made up of several 100 kg pressure loaded so for one on the opposite side of the boat standing person an enormous effort can be required to lift the sheet and so to be released from the jam.

Usual sheet clamps usually have two outwardly pivotable, Toothed clamping jaws, which are pressed against the sheet by return springs. It has been shown that in emergency situations the pressure of the teeth on the sheet is often is too big to allow the sheet to loosen quickly, which will result in capsizing can. In addition, the sheet is often more or less damaged by being torn out.

According to an older proposal (patent application P 27 02 873.5) succeeds it to solve these problems by having the jaws through two or more opposing toothed rollers suspended in housings and pivoting outwards replaced. In this way it is achieved that a movement of the clamping rollers is possible both in the horizontal and in the vertical direction.

It has now been found that a solution to the problems described can also be achieved in an even simpler manner in that one of the clamping jaws conventional sheet clamps replaced by rollers freely rotatable on rigid axles, which at the same time can still be moved in the longitudinal direction. Accordingly The new Schotklemme consists of a base plate on which four each other Pairs of opposite axle bearings serving to accommodate rigid axles are located.

In one of these pairs of axle bearings are the individual axle bearings closer together than with the other, so that the axes stored in them Strive apart in a V-shape.

It is essential that a relatively acute angle of about 25 - 350, preferably about 300, is complied with.

On the axes mentioned above, two run freely rotatable about these axes and at the same time, toothed rollers that can be moved in the axial direction, which are becoming increasingly popular bilaen widening clamping gap with each other. About the freedom of movement To bring about in the axial direction, it is necessary that the roles are slightly shorter than the axles themselves. It is also desirable if the teeth of the rollers touch at the point where they come closest to each other.

The axes (and thus the roles) are expediently in the same position horizontal plane, which does not have to be parallel to the base plate, but e.g. can also run slightly obliquely to this.

Inside each of the toothed rollers there is one (possibly protected by a sleeve); Suitably rust-free spiral spring (return spring) under very low tension with a stop on the pair of axle bearings that are further apart. These springs have the task of reversing this shift as much as possible after the sheet has been inserted into the clamp, in which the rollers Ja are shifted along the axis in the direction of the open end of the V-shaped clamping gap, and so the toothed rollers to press the sheet.

According to another embodiment of the invention, several Axle or roller pairs on top of each other in a tiered manner (i.e.

running parallel from top to bottom at approximately the same distance) will. Several pairs of roles have e.g.

the advantage that there are several floors between them Form caverns on top of each other. Is a particularly intense definition of the If the sheet is required, the sheet can be easily tightened by increasing the pressure be pressed into the next deeper cavern.

The rollers can take any shape suitable for the inventive purpose assume, e.g. cylinder (roller) shape, ellipsoid shape, spindle shape, barrel shape, spherical shape, Truncated cone shape or pear shape. An ellipsoid or also is particularly suitable a pear shape. In the case of the latter, only the thicker ones, in the direction of the "V-point" lying parts have a toothing, since this is where the actual clamping process takes place.

The toothing of the rollers can e.g.

also in circles running diagonally downwards around the roll or run around the roller in the manner of a helix; also a very irregular one Serration (corrugation) is possible. Mutual interlocking of the teeth is not necessary, on the contrary, it can even facilitate the laying of the sheet, if the opposing serrations are a small distance (less than 1 mm) from each other hold, it is advisable to sharpen the teeth towards the pointed "V-end", i.e. to let the teeth protrude more.

Another embodiment of the invention is characterized in that that on the base plate within the area enclosed by the rollers ("V") a pivoting tongue or a bracket is attached through which an additional Down the sheet can be effected. In this way it is possible to use the clamp adapt to sheet thicknesses of different thicknesses, i.e. with just a few sizes for everyone common sheet diameters.

The material used for the manufacture of the rollers is light metal or relatively soft plastic (e.g. polyamide or phenolic resin) should be considered. this has the advantage that the production of the roles is cheaper, that damage the sheet can be largely avoided and that a weight saving occurs.

The roller axle is expediently riveted in the respective axle bearing, screwed (e.g. with countersunk screws) or easily detachable in a similar way attached so that the role can be easily removed and replaced later can be.

The advantages of the invention over known clamps are in particular in that the freeing of the sheet is very easily possible because it is pulled out only brings the reversal of the assignment. While when laying the sheet initially the two curved inclined planes on the top of the rollers slides down and then by low pressure - which counteracts a shifting of the rollers along the axis causes the resistance of the return springs - the one between the two rollers in theirs the nearest area has to overcome the resistance formed, is reversed when lifting the sheet into the gap formed on the underside of the rollers and also only has to counteract the low resistance of the coil springs when lifting to overcome the bottleneck of the synchronously rotating rollers (this time from below). In this way, the sheet can be loosened quickly even when it is wet.

Compared to the older proposal (patent application P 27 02 873.5) can The less sensitive design should be emphasized as an advantage, e.g. it is swiveled out the roles no longer.

This elimination of the lever function of the roles occurs significantly less wear and tear, and the ideal angle of co 300 is permanently maintained. The elimination of the previously necessary roller housing leads to less wear, there a possible disruptive factor is not applicable. Furthermore, the device according to the invention is not absolutely dependent on (easily split) feathers, rather it remains (if also reduced) functional if the springs are omitted.

But the weight savings due to the missing housing are also important. Since there are usually 20 or more bulkheads on a boat, this is for racing boats already an important moment.

A very important advantage of the present clamp is that they on both sides i.e. also and straight from the rear side (i.e. the "V-point") is to be opened.

This is particularly important when the sheet (e.g.

over a roller) deflected by 180 ° and with a so-called.

NTraveller "(sheet wagon running on rails, used for trimming purposes) connected is. This is not possible with all previously known terminals.

The invention is explained below with reference to FIGS. Like numbers mean like parts.

Figure 1 shows a plan view of a cleat according to the invention with pear-shaped rollers. 1 means a toothed roller, 2 the rigid in the Axle bearings 3 and 4 suspended axle, 5 means the one inside the roller Spiral spring and 6 the base plate, which by means of two (not designated) screws is attached to the edge of the boat.

FIG. 2 shows a view of a device according to the invention obliquely from the front. The numbers 1 to 4 and 6 have the same meaning as in FIG. 1. One for additionally setting the SchotA to use The tongue is marked 7. 8 represents the sheet fixed in the clamp.

In Figure 3 are further possible forms of the pinch roller in cross section Shown: From top to bottom one spindle-shaped, one cylindrical and one barrel-shaped roller.

Claims (1)

Claims 1. Schotklemme with at least two pairs of each other opposing toothed clamping rollers, characterized in that the rollers In each case freely rotatable about a rigid axis and displaceable on it in the axial direction are. 2. Schotklemme according to claim 1, characterized in that the roller axles form an angle of about 25-35 °, preferably about 30 °, with one another. 3. Schotklemme according to claim 3, characterized in that the Rolls in their nearest place touch 4 * sheet clamp according to claim 1, characterized in that there is a return spring between the axle and the roller, which surrounds the axle and is possibly even surrounded by a sleeve * 5 * Schotklemme according to claim t, characterized in that several pairs of rollers are stacked on top of each other in a tiered manner are attached, their roller axes from bottom to top at the same distance and are arranged in parallel. 6 * sheet clamp according to one of claims 1 to 4, characterized in that that the roles are designed pear-shaped, with only the thickened, the clamping gap line forming the roller have a toothing. 7. Schotklemme according to one of the preceding claims, characterized in that the toothing of the rollers is arranged in circles running next to one another around the circumference of the roller or in the manner of a turner running around the roller * & * Schotklemme according to one of the preceding claims, characterized by, that they have an additional pivotable or foldable inside the area enclosed by the rollers having. 9. Schotkle ¢ me according to claim 1, characterized in that as Mater Used for the production of the rolls of flexible plastic or light metal became. 10. Schotklemme according to one of the preceding claims, characterized characterized in that the rollers are easily interchangeable mounted in the axle bearings are.