DE3249069T1 - Carrier for a towing device - Google Patents

Description

Carrier for a towing device

The invention relates to a carrier for a ski opρ-before r Richt, ung, the particular ζ um transport. fell 1 t.er trees in Forest serves.

More specifically, the invention relates to a carrier for a towing device of the kind that has a longitudinal ·. ] ichei? along dor transport 1 now ve r 1; ui fondos and ni.i.l.l ο 1 s a 'moving back and forth drive mechanism' element, includes, as well as a plurality of carriers that are removable at any desired point on the elongated E learn η Ι attachable and at a certain place for the release of the tasi what these are removable. '

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A towing device of this general type: is im Swedish patent. 78089-2 disclosed. The bearers of this Towing device to grasp a lock that means p- wedge action pressed against the elongate element, and along with. this can be brought up if that elongated element moves in one direction, whereas them on the item without the. Slide load to move when this moves in the opposite direction.

The towing device according to this prior art is characterized in that the elongate element consists of consists of a flexible strap, preferably one synthetic text 11 werkst ο ff, and that the carrier out

l§ consist of a sleeve or cylinder slid in the longitudinal direction and have a ratchet mechanism which at least partially blocks the slot of the cylinder. The pawl mechanism can be actuated by an ejector adjacent to the elongate member, which can move the pawl into a slot opening or releasing position.

According to another patent, namely the Swedish one Patent. 7904518-3 is the pull strap with a wide variety of spaced-apart, solid thickenings

wersehen, which are preferably in the form of gummy beads ; In the text, ι 1 st re ι f en are arranged to be effective Closure or closure of the pull strap without clamping the closure to guarantee.

In practical terms. rubbed is a driving mechanism used at one end of the belt to pull dι as one in one direction, while a spring or the like at the other end, the Ri is a ns used in this. 35 to pull the opposite direction and thus the

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To give straps a reciprocating motion, depending on the construction of the ant ι ebsmeclwin ι sinus π in Stroke from a few decimeters to an intimate ten Γ 9 rhi; η of

Meters is reached.
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Pull strap of this construction. are expensive to manufacture and difficult to replace inasmuch as they are pronounced Are special products and not standard goods.

_n addition to this disadvantage lies in the above-mentioned pull belts another is that the engagement between transmitter and belt always on one and the same points, namely to the solid Verdickungen.bzw. takes place close to these. This means that the wear and tear is concentrated in certain areas ;;

p. This is; naturally unsuitable.

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The. The invention is based on the object mentioned Eliminate disadvantages.

This object is achieved according to the invention by the features in The characterizing part of claim 1 is solved.

Exemplary games of the invention are based on the following schematic drawings, described in detail.

"R It show:

Fig. 1 shows a first embodiment 1 sp. 1 e 1 e 1 η it erT 1 in accordance with the requirements Carrier in side view and partly in section along line I-I in Fig. 2,

Fig. 2 shows the carrier in cross section along 1.1 η i 0 II-l.I.

in Figure 1,

Fig. 3 in Perspekt.ive and somewhat enlarged, a wedge

element for use in the carrier; r according to ■ Fig. 1,

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4 is a side view of a second exemplary embodiment of the carrier according to the invention,

Fig. 5 the beam in the section, along L in each V-U in

Fig. 4, and

6 is a perspective view of a third Embodiment of the invention Carrier.

Figures 1 and 2 show a carrier according to the invention, of a housing 10 with. an upper 11 or lower wall 12, a back wall 13 and a forehand 14. the last, mentioned wall has. a side opening or a slot 15 of suitable shape., which extends over the the entire length of the carrier extends .. The housing 10 of the Carrier is. with upper and lower wedge-shaped ramps 16 and 17 ', which are marked with. Wedge faces 18 and 19 of one In Figure 3 shown wedge element, s can work together.

The wedge element. according to Figure 3 comprises two spaced apart Wedges 21 and 22, between which a space 23 for receiving a pull rope 25 is formed. As in the figures 1 and 2 is shown .. The two wedges 21 and 22 are means a back wall or web 26, which or between According to them, Figures 2 and 3 is arranged., Held together. In this example, the Space 23 the shape of a groove with rectangular, over the whole e length, constant or unchanged cross-section; It is open, however, that the farm- the cross-section adapted to the pull cords considered for use. It is also possible to use the wedges 21 and 2 2 with internal embossing or elevations or the like to be provided to the friction of the pull rope

certain points or at different points. Punk I on -nn L] a.ncj to increase the length of the wedge. However, this re ibbeau f se h J arjunq intended as exemplary hereinafter iih rl r ι rhe dam r ι is above, not be greater than a best ι mmt.er Who t, of a slippage of Kei 1 el ement.s 20 and thus the entire carrier 10 easily on the rope 2 5 if; this is moved in one direction. It should be noted that the wedges 21 and 22 are slightly rounded at their smaller ends, as clearly shown in FIG.

To provide a limited movable connection between the wedge element 20 and the carrier housing to ensure is the wedge element, in the illustrated exemplary embodiment mj L a pin 27 is provided, which is in a bore or a Slot 28 in the rear wall 13 of the housing 10 engages To stay. of the ke il el ement.s 20 within the housing of the carrier when the pull rope 25 moves in one direction

device, namely to the right according to Figure 1, ensure,

it is also possible to leave the space for the Ke i.l el ement 20 inside of the housing to be provided with shoulder-shaped stops 29 and 3 0, which the movements of the wedge element with respect to the housing of the wearer in the direction to the right s g e 25

limit figure 1.

The wedge element 20 can consist of any material suitable for this purpose, such as "Delrin" (polyacetal plastic) or the like. It should be noted that the exact geometric shape of the wedge element 20 and the ramp-shaped wedge surfaces 16 and 17 interacting therewith should be adapted to the respective requirements. In general, the wedge element should extend 20 ent. Long a certain length of the pull rope, so that the entire ob

Engagement with. this is sufficient to generate very great powers

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without transferring impermissible point loads on the pull rope 25. It should also be noted that the For in the Wedge surfaces 16, 17, 18 and 19 should be such that p. the Ke 11 element. the pull rope 25 is applied with great force. When this is moved in one direction while on the other hand, when the pull rope moves in the opposite direction Direction of the wedge element, comparatively light of the ramp-shaped wedge surfaces 16 and 17 within , p. of the housing of the wearer should be released, whereby this loosens the grip on the pull rope 25, so that its movement with respect to the wedge element.s 20 and the whole Carrier approved a st.

ic The operation of this embodiment will be described below: First, the wedge member 20 in the housing of the carrier in ¹ position shown in FIG. 1 inserted, and then the entire carrier is attached at any point to the reciprocating pull cord 25 by inserting it through the slot 15 in the carrier. Then a wire belt (not shown), to which the respective load, for example in the form of felled tree trunks, is attached, is suspended in a ring 24 on the housing of the carrier.

Since the pull rope 25 in the working direction, as indicated by arrow A As shown in Figure, the carrier 10 is due to des E.i'nqr iffs des wedges learn η Is 20 with the pull rope 2 5 together with this m i t, and sorni t. the burden over One particular step is moved to the left as shown in FIG. 1.

Then the pull rope returns in the backward direction through which Arrow R is shown around and initially guides the carrier 10 according to Figure 1 to the right with until the slack of the wire belt is used up. At this moment the housing of the carrier is stopped, while the wedge element 20 is limited Moves to the right until this element too, is stopped, namely in this embodiment

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in that the pin 27 is at the rear end of the slot 28 abuts, or that the Kei1 element on the shoulder-shaped Stop 29 and 30 on the loess .. Then start each time the wedge element, and together with. this also the carrier ■ ·.

10 as an E .1 sew i t. to slide on the pull rope 2'J> , which advances a further piece in the direction to the right according to FIG. Then the pull rope reverses vim and moves. ^; moves again in the direction of arrow A, whereby the carrier 10 again grips around the pull rope 25 after the slack of the wire rope has been used up, and thereby moves the load a further step in the direction of arrow A. In this way, the load is thus moved step-by-step in the direction to the left according to FIG.

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In the receiving station, the load is either released or released in that the wire belt is released from the ring 24 is, wherein the carrier 10 remains on the pull rope, and to transport itself together with this without any load reciprocated, or by the fact that the carrier 10 as a unit, is removed from the pull cord 25, e.g. by means of a mechanism that pushes the carrier sideways from the pull rope.

_ The carrier according to the invention differs from the

Carriers according to the prior art in a very important Aspect, namely with respect to the extent of engagement between the clamping or locking device and the Pull rope. The clamping in beams according to the prior QQ art, which by a wedge action in engagement with the Rope can be brought to carry the load by moving the rope in one direction with and without moving the Slipping load on the rope consists of a ball, which works in a conically tapering room brought dimensions can this sphere of course only unite?

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Point restraint or limited line contact with., the Zu gse i 1 he rst.el 1 en, which is part of a practical implementation match the shape of a flat yielding p- belt has, in the in beabst. a η de ten intervals rubber inserts are used. Because of the point or line contacts the flexible belt is tapped point by point A / ice stresses underworn,. especially tight at the Gurnm ι e j ns Mt ζ en; this is of course unsuitable:

-.Q In order to allow the transmission of large forces, for example during the transport of heavy loads, the conical space, although there is only point contact, must have such a conicity in relation to the diameter of the ball that it can easily become wedged

ic is created. Such a lock or such a clamping means that the carrier does not slip on the pulling rope during the backward movement of the rope, but that at best the load is pulled back and forth, or that the towing device is put out of operation or comes to a standstill comes because, as a result, the retraction spring is not able to complete the backward stroke of the pull rope.

These disadvantages are caused by the carrier according to the invention among other things by the fact that the Ke ilel ement. that Pull rope acted on a considerable area, the corresponds at least twice and preferably five or more times to the smallest cross section (diameter) of the pull rope. Since the wedge element. itself wedge-shaped 'and for Cooperation with: at least a ramp-shaped wedge surface is suitable., the angle of the wedge surfaces 16, 17, 21 and 22 are also chosen so large that there is no danger there is a wedge obstruction. There are also very great powers can be transmitted without reinforcing the engagement Deposits or the like would be required in the rope, you have the option of using any standard pull cord 1, such as those in the form of an ordinary

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commercially available steel wire or rope Nylon such as "Kev.lar" (Po] ynmi d * (Fase rn)) or the like . .

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The embodiment according to Figures 4 and 5 includes a jaw member 30 that can be in any desired location can be placed on the pull rope 25, and a second Clamping jaw element .31, which is movable with respect to the first and with this by means of two rotatably mounted Ver.

bindings 32 and 33 is connected. The connections 32 and 33 are on the two jaw elements 30 and 31 by means Trunnions 34, 35, 36 and 37 rotatably mounted, und.die In Figure 4 right connection 33 extends over the lower pivot pin 37 and thereby forms a two-armed lever, the lower arm of which is provided with a ring a load can be attached to another.

On their inner sides, the clamping jaw elements 30 and 31 with irregularities that increase friction

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or be provided with a friction-enhancing coating. The jaw members may be profiled in a suitable way ', in order to prevent that the rope is pulled on the return stroke out of the gap between the jaws _{O (_,} as shown in FIG. 5

It should be noted that connections 32 and 33 go together with the clamping jaw elements 30 and 31 a so-called Form the parallelogram connection system, which is

OQ indicates that the jaws move counterclockwise of the lever comprising the connection 33 around the pivot 37 ferstor / usammoucjodr ür'k t been what leads to the fact that the carrier as a whole is fatter around the pull rope 25 is clamped, provided that this is in the direction to the left according to Figure 4, as shown by the arrow A, emotional.

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It is easy to see that it is possible through suitable e Choice of the distance between pivot pins 34, 36 and 35, 37 as well as the distance from pivot pin 37 to the Ring 38 with the power to vary. the d: he clamping jaws

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30 and 31 are pressed against the pull rope 25 so that any desired loading force: is obtained.

The carrier shown in Figure 6 comprises a housing 40 _v groove. a Schi Jt.z 41 for receiving the pull rope (not shown). A schi it. ζ 42 cuts in the housing 40, the Schi it. ζ 41 at an angle of approx. 10 to 20 ° and takes on a wedge 43 of T-shaped cross-section. -At least one of the surfaces of the wedge 43 is with. one the friction

, _ reducing layer or AnL i friction layer. 44 provided. Ib

The wedge 43 is secured by means of one or more springs (not shown) to move to the right as shown in Figure 6, i.e. in the direction of arrow B. The inner end of the Wedge that is suitable for engagement with the pull rope,

2Q is preferably serrated to allow engagement with the rope amplify so that it prevents it from being blocked is. One side of the slot 41 has two protruding ones Pins 45 and 46 that point in the direction of bridging the Slot and thus a releasable clamping of the pull rope

nc are spring-loaded in the slot. The. Pens can be easy be depressed by means of the pull cord itself when this is inserted into the slot, and they can be depressed either manually or automatically, to allow the rope to be removed from the unloading station. As described above, the carrier has a ring 47 for. Adoption of a ■ load belt of suitable shape and design ion.

Although the invention based on specific exemplary embodiments It is obvious that in the frame .des E r f i ndunijsy e thanks ns various changes vorijononimen we can do it.

Claims (2)

Claims. 1. · / Carrier for a towing device of those Kind, honor an elongated one arranged along the transport line and back and forth by means of a drive mechanism retractable element. (25) includes as well as a multitude of supports (1.0) which can be releasably attached at any desired location on the element and from the elongate element in a certain place to release the load, removable are, wherein the carrier comprises a housing (11, 12, 13, 14) which receives a closure which by means of ■ KeiIffekt against the elongated element is pressed, and the load together with the elongated element by its movements in a rectification can lead to, and the one on the element without Moving the load can slide when this moves executes in the opposite direction, thereby marked t that the clasp is a ke-il element. (20) includes, that itself, wedge-shaped and limited moveable within of the housing of the carrier, and against a pull rope (25) as an elongated element, with. at least, some friction, also in the rest position, during the backward stroke of the Pull rope is applied, and that has a length that at least twice, and preferably up to five or more times the smallest cross-section. , i.e. the diameter of the pull rope is equivalent to. - χ - AU DE 3507 2. Carrier according to claim 1, characterized in that that the Ke i 1 el ernent. (20). two spaced apart wedges (18, 19) ', which by an intermediate Web (26) are interconnected and between them a laterally open channel (23) for pulling the rope (25) is formed.