EP1159987A2 - Cable brake - Google Patents

Abstract

The cable brake, especially for cables of synthetic fibers e.g. climbing ropes, has a housing (10) with a guide with at least one passage opening (14,16) for at least one rope loop (20,22), and a moving bar (18) on a defined plane where the loops pass around it. The openings in the housing are elongated holes. The moving bar is at two edge sections (10b) of the housing and at a center housing section (10c), between the rope loop passage openings.

Description

The invention relates to a rope brake, in particular a brake for Synthetic fiber ropes such as climbing ropes or the like, according to the genus of Anspuches 1. Such a rope brake is from the DE utility model 89 04 030.9 known. The casing of this well-known The rope brake essentially consists of two parallel to each other arranged guide cheeks, which are rigidly connected to each other and have congruent slots. The effect of this known Device as a rope brake is achieved in that in the two elongated slots a carabiner is latched around which the slots a rope loop is placed through the penetrating crossbar. Under pressure The carabiner of the rope becomes inside the guide slots moved that the rope loop between the crossbar of the Carabiners and a crossbar between the guide cheeks is pinched. The handling of such a rope brake is difficult and it becomes when using stiffer and / or thicker ones Ropes for a time-consuming effort. Otherwise the braking effect occurs only by using two separate parts, initially in correct Way must be put together by the user.

The invention has for its object an easy to use Rope brake with a wide range of applications and high security create. The application is intended for both climbing and climbing Securing people ahead and behind as well as possible the use as a descender and as a rope clamp, both at Use of a single rope as well as when using a Double ropes.

This object is achieved by the features of the invention Claim 1 solved. You get a light, self-locking Device that has no additional parts, for example none requires additional carabiners. The handling is everyone Applications simple and security high, especially because one in the brake-guided rope under sufficiently heavy load or at light tension on the brake cable automatically clamps, so that to secure the load does not require a holding force. Both the insertion of the rope as well as its release after a load case are without Difficulties feasible.

Advantageous embodiments of the invention result from the secondary claims and from the subclaims as well the description of the exemplary embodiments. It has proven itself form the opening in the housing like an elongated hole. Particularly advantageous it is when there are two openings for the passage of two rope loops arranged side by side and shared by the brake bridge are overstretched. Instead of two separate openings, however, can also a wider opening corresponding to the total thickness of two ropes be provided or a single opening according to the thickness of the rope used if the brake is designed for only one rope.

The braking effect of the rope brake is very simple in that the web spanning the opening or openings in Direction of the opening in the housing, or in that of the Rope loop defined level is displaceable, so that under load the rope loop is clamped between the web and the housing. This is made possible by a swiveling arrangement of the web Inserting the rope is particularly easy.

As long as the rope is unloaded, that means when entering the rope and Rope output, the web is countered by a spring and a lock secured pivoting, preferably by a spring and additional ribs on the housing or by a spring element and a Stop of a guide element connected to the brake bridge. This stop is conveniently on a bearing block provided in which the guide element of the web both is held longitudinally displaceable as well as pivotable. The same feather also causes the bridge to enter during rope entry or Rope output is kept in its neutral position in which the rope can slide in the opening without jamming. The guide element can additionally in its longitudinal direction and thus also in the The direction of displacement of the brake bridge must be adjustable so that the unloaded position of the web, or the adjustment path to Braking is adjustable by pinching the rope.

For attaching a body to be braked to the rope brake when Abseiling, or to attach the rope brake to the or in the area of the person operating the rope brake is one Fastening device provided on the housing. This exists for example, from a fastening web between two lateral ones Cheeks on the housing of the rope brake in connection with a Band sling, which requires the use of an additional carabiner dispensable, or from a mounting hole directly in one Housing wall. A carabiner can be used instead of a sling be hung directly into the fastening device. Instead of one Fastening web between two side cheeks on the housing can also advantageously formed a single central cheek on the housing be with one or more, in different positions to the or the openings for the rope passage arranged for Attach a rope loop or a carabiner. Due to the location of the Fastening device or fastening opening opposite the The braking force is determined by the direction of displacement of the brake bridge. Each stronger the attachment point of the direction of displacement of the brake bridge is approximated, the greater the braking force Rope brake according to the invention. For this purpose, several optionally available mounting options are provided. Instead of separate attachment points, however, it would be, for example also possible, the fastening device in an elongated hole against the Force a spring to guide, depending on the spring force or the Spring preload and thus from the resulting position of the Fastening device the braking force changes.

It has proven particularly useful if there is at least one on the housing further recess for additional guidance and / or deflection of a Single or double rope is provided, which is preferably open is designed and serves to guide and / or deflect the brake cable.

To limit the braking force to protect against overload, Damage or injury has continued to be beneficial proven if at least one stop for the web on the housing is provided, which the movement of the web in the loading of the Rope occurring movement direction of the web before reaching its limited by the deformability of the rope possible end position.

In constructive terms, it has proven to be very useful if the spring is concealed in the housing, preferably in a blind hole arranged in the operating lever. This gives you one in terms of operational safety, handling and Immunity to interference improved rope brake, one Damage or malfunction of the with the brake bridge cooperating spring is largely excluded.

Embodiments of the invention are described below with reference to the Figures explained. 1 shows a schematic, perspective view of a rope brake according to the invention, in Figure 2 of Figure 1 corresponding rope brake with additional Deflection of the rope or ropes, in FIG. 3 an arrangement according to FIG. 2 with a suspension point in the area of a middle cheek on the housing, in Figure 4, an embodiment with side stops for the brake web and in Figure 5, an embodiment protected in the operating lever arranged spring.

In Figure 1, 10 denotes the housing of a rope brake, which as essential components a fastening device 12 and Has guide device for the rope. The guide device contains two slot-like openings 14, 16, which are shared by a bolt-shaped web 18 are spanned, which in the following is also referred to as a brake bridge due to its function. At the top Part of the openings 14 and 16 is shown schematically the rope entry and designated 20, in the lower part of the slot-like openings 14 and 16 on the other side of the web 18, the associated one Rope exit 22. This forms the tether, which with the braking body, or with the respective load is applied, which is connected to the fastening device 12 is. The cable entry 20 forms the brake cable. The two ropes shown each pass through the openings 14, 16 to form a rope loop through, the rope loops opening 14,16 spanning web 18, reach around. Here is the rope entry 20, or the brake cable, always on the side of a later bearing blocks 30 described in detail, while the rope exit 22, or the load or tether is always on the side of the Fastening device 12 is located.

The web 18 is displaceable in the longitudinal direction of the openings 14, 16 and at the same time opposite the openings 14, 16 from the plane of the drawing swiveling out. The direction of displacement is indicated by arrow 22a Swivel direction marked by the arrowhead 22b. Under The web 18 rests on the rope 10 on the housing 10 and is on the side Sections 10a, 10b and at a central section 10c of the Housing guided between the slot-like openings 14,16. In the Position of the web 18 shown in the figure forms the neutral position for a rope input or for a rope output without Jamming. For the passage of the rope sections the rope loop is on Both sides of the web 18 have enough space so that they do not jam and slide with little friction loss, the width of openings 14 and 16 the maximum thickness of the ropes that can be used certainly. In this area, the web 18 is by housing ribs 24, 26 secured against pivoting in the direction of arrow head 22b, and over the entire length of the housing ribs 24, 26. The Housing ribs are indicated in dashed lines in the drawing because they only one of several options for securing the brake bridge 18 against swiveling. This securing is necessary so that the Unloaded rope cannot slip out of the rope brake.

The web 18 is connected to a bar-shaped guide element 28 Bearing block 30 coupled in which it is longitudinally displaceable and pivotable is held. On the guide element 28 is between the web 18 and the bearing block 30 is arranged a coil spring 32, the Bias in the drawn embodiment together with the Length of the guide element 28 is adjustable by means of nuts 33a, b. However, this adjustability is normally not necessary. Since the Bearing block 30 is fixedly connected to the housing 10, which determines Length of the guide element 28, the position of the web 18. From this Position out is the web 18 in the direction of the Arrow 22a moved, whereby the rope entry end 20 between the Web 18 and the housing 10 in the region of the upper ends of the Openings 14, 16 are clamped and held. This results in if the rope load is sufficiently high, automatic braking and Securing when the force of the load acts on the rope exit 22. If for example when abseiling the body to be braked respectively the load in the area of the fastening device 12 is a force 13 exercised below, with the rope exit end 22, that is, with the leading load rope in the area of the rope exit 22, the braking force in Applied in the direction of arrow 22a.

The pivoting of the web 18 facilitates the threading of the or Ropes, that means threading the rope loops around the web 18. When the web 18 is pivoted out, the rope loops are through the Openings 14, 16 inserted through and around the two ends of the web 18 laid around, which then again in the housing is pivoted back. The holding force in the housing is determined by the spring 32 exercised. In addition, the web is against pivoting through the upper one Nut 33a secured to a projection 30a of the bearing block 30 is present. For the sliding and swiveling mounting of the Guide element 28 in the bearing block 30 is a journal in the latter 40 is provided, which is rotatably arranged in the bearing block 30. The Guide element 28 penetrates a bore 41 in the bearing pin 40, in who kept and led it. Is in one piece with the guide element 28 a lever 43 is formed, which the actuation of the web 18 via the Guide element 28 allows. The operating directions of the lever 43 are indicated by the arrows 43a, 43b and 43c, the arrow to Above corresponds to arrow 22a and denotes the Direction of displacement of the lever 43 in the braking position of the web 18th The arrow 43b perpendicularly denotes the direction of movement of the Lever 43 for pivoting the web 18 when inserting the Rope loops. To reduce the braking force or Loosening the rope, the lever 43 is pushed in the direction of arrow 43c, whereby the entire rope brake is pivoted.

The fastening device for the load to be braked, respectively the body to be braked has one in the exemplary embodiment Band loop 44, which engages around the fastening web 42 and with its end, not shown, when abseiling with the load or with the is connected to the body to be secured. When backing up an advance or descending person is the strap loop 44 with a fixed point or connected to the body of the belayer. The fastening bridge 42 is optionally held in different bores 46, the perpendicular distance to the direction of displacement of the web 18 the Braking force of the rope brake determined. The further away the Fastening web 42 from the direction of displacement of the web 18 is arranged, the lower the braking force, since the cable only with its vector component in the direction of arrow 22a is a braking force generated while the force component in the direction of arrow 22b from Housing 10 is included. In this way, the braking force be adapted to requirements. Instead of ordering the Fastening web 42 in discrete bores 46 could instead an elongated hole can be provided in which the fastening web 42 is held against a spring force, whereby an automatic Adaptation of the braking force to the weight of the body to be braked would be achievable. Such an elongated hole would have to be under a suitable one Angles run in the area between the arrow directions 22a and 22b.

The rope brake according to the invention described enables both Securing people ahead and behind, but it can also used for abseiling and as a rope clamp, both in Single and double rope technology. When rappelling the Braking effect is reduced in that a force in on the lever 43 Direction of arrow 43c is exerted, causing the housing to tilt and here the clamping effect between the web 18 and the edge of the Openings 14, 16 subsides. In addition, by means of the lever 43 very easy way the clamping force on a blocked rope again be lifted, for example after a fall while climbing sports. It is important that the rope automatically under load clamped so that no hand on the safety rope after loading necessary is.

Also to be emphasized is the advantageous possibility of using the rope without Solution of the brake thread from the suspension point, since after the Swiveling the web 18 only through a rope loop through the opening 14 or 16 inserted and must be placed around the web 18. To pivot the web 18, the lever 43 must first be included the guide element 28 so far in the direction of arrow 43a until the locking by the projection 30a and the nut 33a, or is canceled by the housing ribs 24, 26. On in this way the locking device can be deactivated and the rope brake is released or opened. On the other hand it is sufficient to pull gently at both ends of the rope loop around the Pull web 18 into the housing and secure by locking. The position of the web 18 shown in the figure remains as long receive how no large forces act on the rope. Lesser Forces caused by rope friction and the weight of the rope itself are the spring 32 compensates. The cable pull has an after-effect in the event of a load leading rope on the section of the rope loop, which as Rope exit 22 (load rope) is marked. This moves the Brake web 18 in the direction of arrow 22a upward, the spring 32 compressed and connected to the web 18 Guide element 28 slides so far through the bore 41 in the journal 40 until the section marked as rope entry 20 (brake rope) Rope loop between the web 18 and the upper edge of the slot-like opening 14 or 16 is clamped. At the same time, this lengthens the length of the lever 43, which especially the leverage when releasing the brake and thus its Operation easier.

When in use, the rope brake is always with the one to be secured Person; in the case of rappelling, this is the rapper himself, the force acts in the direction of the arrow downward, since the band loop 44 on the Last, here is attached to the belt of the person who is abseiling. When a the person in front is secured, the situation is approximately the same the rope brake, since the rope exit end 22, i.e. the load rope, goes up leads. When belaying a person behind, the turns Working position of the rope brake because the force 13 and the strap loop 44 point up to a fixed point.

Two further developments of the embodiment according to FIG. 1 are explained below with reference to Figures 2 and 3. In it are the same Parts with the same reference numerals as in Figure 1. With 10 is again referred to the housing of a rope brake, which as essential components of the fastening device 12 and Has guide device for the rope. The guide device contains two slot-like openings 14, 16, which are shared by a bolt-shaped web 18 are spanned, which in the following is also referred to as a brake bridge due to its function. At the top Part of the openings 14 and 16 is shown schematically the rope entry and designated 20, in the lower part of the slot-like openings 14 and 16 on the other side of the web 18, the associated one Rope exit 22. This forms the load rope or tether, which with the body to be braked, or with the respective load is applied, which with the fastening device 12 is connected. The cable entry 20 forms the brake cable. The two shown ropes each pass through to form a rope loop the openings 14,16 through, the rope loops to the openings 14, 16 spanning web 18, reach around. Here is the Rope entry 20, or the brake cable, always on the side of the Bearing blocks 30, while the rope exit 22, or the load or tether always on the side of the fastening device 12 located.

The web 18 is displaceable in the longitudinal direction of the openings 14, 16 and at the same time opposite the openings 14, 16 from the plane of the drawing swiveling out. The direction of displacement is indicated by arrow 22a Swivel direction marked by the arrowhead 22b. Under The web 18 rests on the rope 10 on the housing 10 and is on the side Sections 10a, 10b and at a central section 10c of the Housing guided between the slot-like openings 14,16. In the Position of the web 18 shown in the figure forms the neutral position for a rope input or for a rope output without Jamming. For the passage of the rope sections the rope loop is on Both sides of the web 18 have enough space so that they do not jam and slide with little friction loss, the width of openings 14 and 16 the maximum thickness of the ropes that can be used certainly. In this area, the web 18 is by housing ribs 24, 26 secured against pivoting in the direction of arrow head 22b, and over the entire length of the housing ribs 24, 26. This backup is necessary so that the unloaded rope is not released from the rope brake can slip out.

The web 18 is connected to the rod-shaped guide element 28 Bearing block 30 coupled in which it is longitudinally displaceable and pivotable is held. On the guide element 28 is between the web 18 and the bearing block 30 is arranged a coil spring 32, the Bias in the drawn embodiment together with the Length of the guide element 28 adjustable by means of the nuts 33a, b is. Since the bearing block 30 is firmly connected to the housing 10, the length of the guide element 28 determines the position of the web 18. From this position, the web is 18 in Moved in the direction of arrow 22a, as a result of which the cable entry end 20 between the web 18 and the housing 10 in the area of the upper The ends of the openings 14, 16 are clamped and held. Hereby there is an automatic if the rope load is sufficiently high Braking and securing when the force of the load exits the rope 22 acts. For example, when abseiling the body to be braked or the load in the area of the fastening device 12 Force 13 exerts downward, with the rope exit end 22, that is with the load rope leading upwards in the area of the rope outlet 22 Braking force applied in the direction of arrow 22a.

The pivoting of the web 18 enables the threading of the or Ropes, that means threading the rope loops around the web 18. When the web 18 is pivoted out, the rope loops are through the Openings 14, 16 inserted through and around the two ends of the web 18 laid around, which then again in the housing is pivoted back. The holding force in the housing is determined by the spring 32 exercised. In addition, the web is against pivoting through the upper one Nut 33a secured to the projection 30a of the bearing block 30th For the sliding and swiveling bracket of the Guide element 28 in the bearing block 30 is the journal in the latter 40 is provided, which is rotatably arranged in the bearing block 30. The Guide element 28 penetrates the bore 41 in the journal 40, in who kept and led it. Is in one piece with the guide element 28 the lever 43 is formed, which the actuation of the web 18 on the Guide element 28 allows. The operating directions of the lever 43 are indicated by the arrows 43a, 43b and 43c, the arrow to Above corresponds to arrow 22a and denotes the Direction of displacement of the lever 43 in the braking position of the web 18th The arrow 43b perpendicularly denotes the direction of movement of the Lever 43 for pivoting the web 18 when inserting the Rope loops. To reduce the braking force or Loosening the rope, the lever 43 is pushed in the direction of arrow 43c, with the entire rope brake around the pivot point of the suspension is pivoted.

The fastening device 12 for the load to be braked, or the body to be braked, points at Embodiment according to Figure 2 on a tape loop 44, which engages around the fastening web 42 and with its end, not shown connected to the load or to the body to be secured when abseiling is. When backing up a person ahead or behind is the Strap loop 44 with a fixed point or with the body of the belayer Person connected. The fastening web 42 is optionally in held different bores 46, the vertical distance to Direction of displacement of the web 18, the braking force of the rope brake certainly. The further away the fastening web 42 is from the Direction of displacement of the web 18 is arranged, the lower the Braking force, because the cable pull only with its vector component in the direction of arrow 22a generates a braking force, while the force component in Direction of arrow 22b is received by the housing 10. To this In this way, the braking force can be adapted to the requirements.

An improvement in the controllability of the braking force results from each have a further recess 60 or 62 at the upper end the housing above the slot-like openings 14 and 16, in which the brake cable 20 can be inserted when abseiling or lowering. This results in an additional deflection in the cable guide, with whose help the operator additionally regulate the braking force can. The recesses 60 and 62 are open in the form of a sector a circle or an oval and thus offer a good one Guide for the rope. Since each rope passage opening 14 and 16 a own additional recess 60 or 62 is assigned, this version also corresponds to the use for a simple-like for a double rope. Due to the open design and arrangement of the Cutouts 60, 62 in the area of the housing edge 64 do not disturb them when handling the unloaded rope. On the other hand, through this additional redirection in a particularly simple and advantageous Way avoided that when the lever 43 is actuated in the direction arrow 43c to suddenly decrease the braking force The braking force is released when the lever 43 is too sudden or is pulled too hard in the direction of arrow 43c. An abrupt one This reduces the braking force when abseiling or lowering avoided and there is no yes / no position of the lever 43 because of the additional deflection of the brake cable 20 is always a minimum Braking effect is ensured when the lock release lever 43 is actuated and twisted the housing and reduced the braking force.

The embodiment according to FIG. 3 corresponds functionally that of Figure 2 and is with the exception of the fastening device designed the same. To attach a load, especially the one belayer is here instead of two side cheeks and one Bridges between these a single central cheek 68 in extension of the central portion 10c of the housing. The Suspension point 66 of the rope brake is defined by a Insertion opening 70 in the cheek 68, the braking force at this embodiment by the distance of the suspension point 66 from the displacement plane of the web 18 is determined. To change the The braking force becomes the design of the cheek 68 and the insertion opening 70 changed so that this distance to the shift plane of the web 18 changes. The further away the suspension point 66 from the The direction of displacement of the web 18 is, the lower the braking force. The lower part of the housing is in the arrangement according to FIG. 2 modified in such a way that the lower side parts of the housing 10 run directly to cheek 68 and this at its outer end support, while the inner end of the cheek 68 integrally with the middle section 10c of the housing is designed.

This rope brake also enables securing ahead and descending people, but it can also be used for abseiling and as Rope clamp can be used, both in single and in Double rope technology. This reduces the braking effect when abseiling reduces that a force in the direction of arrow 43c on the lever 43 is exercised, which tilts the housing and thereby the Clamping action between the web 18 and the edge of the openings 14.16 subsides. In addition, the lever 43 can be used in a very simple manner Way the clamping force on a blocked rope also canceled after a fall while climbing sports. Here is it is important that the rope automatically clamps under load so that no hand on the safety rope is necessary after loading.

Another development of the invention for limiting the braking force shows the arrangement according to Figure 4. This provides a safe, self-blocking device, which is still too high Forces on the person to be secured, as well as on the rope itself prevented. Another advantage of the arrangement is that Differences in braking force between a single rope and one Double rope can be balanced very well. Furthermore, at Use a double rope to evenly limit the Braking force ensured in both ropes when used for one Single rope is not pinched more strongly on one side. That feather at the same time causes the 'unloaded bar during rope input or rope output is held in its neutral position in which the Rope deviates from the drawn clamping position of the rope brake without jamming over the web and through the provided in the housing Openings can slide.

In Figure 4, the rope brake according to the invention is only a portion shown and in the following description only in this Extent explained. The complete design and arrangement of the The rope brake is shown in FIGS. 1 to 3.

In FIG. 4, too, the same parts are again the same Reference numerals as in the previous figures. The Rope entry 20, or the associated rope section, forms that Brake cable. The two ropes shown come under again Form a rope loop through the openings 14, 16, the position shown in Figure 4 corresponds to the braking position. In the So the representation shows the rope entry 20 upwards in the form of Brake cables away while on the other side below the Brake web 18 continue the ropes as load or holding ropes. On this the bottom is also the one not shown Fastening device for the rope brake.

The direction of displacement of the web 18 for braking is indicated by an arrow 22a, the pivoting direction is indicated by an arrow tip 22b. In the unloaded state, the web 18 is in by a spring 32 Direction of arrow 33 moved to a neutral position in which the slide both ropes largely freely through openings 14 and 16 can. Under rope load, the web 18 lies against stops 23a and 23b on, which the movement of the web 18 in the when the Rope occurring movement direction of the web before reaching its possible end position due to the maximum deformability of the rope limit. This position defines a sufficient, but not undesirable high braking force.

The two webs 23a and 23b each project laterally at the same height from the housing into the path of movement of the web 18 and determine its end position under load. Here, the web 18 is below the Action of the rope forces on the one hand and the force of the spring on the other 32 on guide sections 10a and 10b of the housing, which in the Direction of displacement of the web 18 on the bottom of the housing 10 from the lateral housing walls extend up to the openings 14, 16. The Stops 23a and 23b extend perpendicular to the direction of movement 22a, or 33 of the web 18 and correspond in their on Web 18 engaging length about the width of the guide portions 10a and 10b. On the other hand, the height of the stops 23a and 23b is the means their extension perpendicular to the direction of movement of the web 18, chosen so that a secure contact of the web 18 is guaranteed. The The height of the stops 23a and 23b should be approximately one to two times Thickness of the web 18. The stop surfaces of the stops 23a and 23b on the web 18 are also approximately perpendicular to Direction of movement of the web 18.

The remaining structure of the rope brake according to the invention corresponds to Embodiments previously discussed, to which reference is hereby made is taken. Figure 4 therefore shows neither Fastening device for the load or the one to be secured Person, nor the actuation device of the rope brake, of which only a guide element 28 engaging on the brake web 18 with the guide element 28 thereon sliding coil spring 32 are shown. The drawing shows the Coil spring 32 in a tensioned position since the brake bridge 18 below Rope force from its neutral position is shifted into the braking position. The braking position shown shows that the rope to achieve the necessary braking force between Web 18 and the upper end of the openings 14 and 16 is clamped, however only to an extent that is necessary and desirable Braking force safely reached, but not exceeded.

As in the previous explanations, the web 18 is also in here Direction of arrowhead 22b out of the plane of the drawing pivotable to allow easy threading of the rope or ropes enable by a rope loop each with the web 18 swung out inserted through the openings 14 and 16 and around the ends of the web 18th is put around. Due to the force of the spring 32, a neutral one remains Get the position of the web 18 as long as no large forces act on the rope. Lower forces due to rope friction and / or that Weight of the rope itself is compensated for by the spring 32. in the In case of load, the cable pull of the load rope acts on the section of the Rope loop, which is identified as rope entry 22. Hereby the brake web 18 moves in the direction of arrow 22a, which Spring 32 is compressed and the web 18 moves to the Stops 23a and 23b upwards in the direction of arrow 22a, so that the rope is clamped with the desired and specified braking force and is braked.

FIG. 5 shows an embodiment which is further developed in terms of construction, in particular damage or malfunction of the the spring interacting spring as far as possible is excluded.

With this design you get one against external influences as well as against foreign bodies, pollution, icing or the same protected arrangement in which the functional reliability in particular by a trouble-free, constant spring action of the spring cooperating with the brake bridge is ensured. The Arrangement of the spring allowed in a cavity of the actuating lever also permanent lubrication of both the spring itself and also the adjacent parts of the rope brake. You continue to reach by the proposed arrangement that the transition from Neutral position in the braking position no moving parts, especially not the guide element of the brake bridge, from which Housing moved outwards and thus malfunctions be avoided.

It has proven particularly useful if the spring is in a blind hole is arranged in the operating lever. With such a design the spring completely against mechanical influences and by Protected from environmental influences. At the same time the entire rope brake is compact when the Recess in the operating lever and the spring itself designed in this way that the guide element for the brake bridge by the spring is slidable into the blind hole in the actuating lever. A particularly simple adjustment option for the spring force results yourself when the spring is at her from the bottom of the blind hole opposite end at a preferably by a thread on the Guide element attacks adjustable stop nut.

In FIG. 5 too, the same or similar parts are the same Reference numerals as in the previous figures and insofar as not discussed again in detail. That or the ropes are for 5 does not increase the clarity of the drawing shown. On the left is the rope entry 20, on the right, with respect to the web 18 opposite side of the opening 16 of the Rope exit 22 visible. The latter corresponds to the tether that comes with the body to be braked, or with the respective load is applied when braking. The cable entry 20 corresponds to that Brake cable. The ropes, not shown, come under again Form a rope loop through the openings 14, 16 and encompass the web 18.

The web 18 is displaceable in the longitudinal direction of the openings 14, 16 and at the same time opposite the openings 14, 16 from the plane of the drawing swiveling out. The direction of displacement is indicated by arrows 22a, or 33 denotes the direction of pivoting by the arrow 22b. Here, the displacement direction 22a corresponds to the displacement of the Web 18 when braking, the displacement direction 33 results in Loosen the rope or when the brake bridge springs back in its neutral position. The pivot direction 22b results from a manual actuation of an actuating lever 43 in the unloaded Condition of the rope brake, especially for inserting the rope or ropes with web 18 swung out in the direction of arrow 22b.

In the part of the operating lever 43 which is broken open in the drawing a helical compression spring 32 visible, which within a Blind hole 44 is guided and held in the lever 43. The spring 32 supports on the one hand at the bottom of the hollow space or blind hole 44 and on the other hand on a stop nut 33a, which on a not shown thread of the guide element 28 for adjustment the bias of the spring 32 is arranged adjustable.

The web 18 lies on the housing 10 under spring force and / or rope load on and is on guide sections not recognizable in the drawing of the housing on the side of the openings 14, 16 and on a middle one Guide section 10c between the slot-like openings 14,16 guided. The position of the web 18 shown in the figure forms the neutral position for rope input or for rope output without jamming the rope. For the passage of the rope sections of the Rope loop is in this position on both sides of the web 18 Enough space so that these with little friction loss in the Openings 14, 16 can slide.

The web 18 is connected to the rod-shaped guide element 28 Bearing block 30 coupled in which it is longitudinally displaceable and pivotable is held. On the guide element 28 is on the web 18th opposite side of the bearing block 30, the spring 32 in the Blind hole 44 arranged. The bearing block 30 is in one piece or fixed to the Housing 10 connected and receives a journal 40 in which the Guide element 28 slides. The spring 32 is supported either directly from the bearing journal or it is applied with a variable preload the stop nut 33a. The guide element 28 can partially in the spring 32 and slide into the blind hole 44, whereby a Shortening the overall length of the rope brake results. From the illustrated The neutral position is under rope load the web 18 in the direction of Arrow 22a moved, whereby the rope entry end 20 between the Web 18 and the housing 10 in the region of the stops 23a, b facing ends of the openings 14, 16 is clamped. Hereby there is an automatic if the rope load is sufficiently high Braking and securing when the force of the load on the brake bridge 18 acts in the direction of arrow 22a.

Since the guide element 28 by the rotatable bearing pin 40 of the Bearing blocks 30 passes through, it is together with the Actuating lever 43, pivotable. The direction of actuation of the Lever 43 is identified by arrows 43c and 43b, one Deflection of the lever 43 in the direction of arrow 43b a movement of the brake web 18 in the direction of arrow 22b, as long as none significant rope force acts on the web 18. The deflection of the Actuating lever 43 in the direction of arrow 43b then causes one Displacement of the web 18 beyond the upper edge of the housing, which in turn makes it particularly easy to insert one or two Ropes is made possible by a rope loop through the respective opening 14, 16 and inserted around the free end of the web 18 is put around. Even with low rope load and / or under the Force of the spring 32, the brake web 18 returns to the neutral drawn Rest position and in this position enables rope guidance without significant friction. In the event of a load, i.e. in the direction of Arrow 22a shifted brake bridge and pinched rope between the brake web 18 and the one located in the direction of arrow 22a respective ends of the openings 14, 16 actuate the lever 43 in the direction of arrow 43c a reduction in the braking force, since with the movement of the operating lever 43 in the direction of arrow 43c at the same time the entire housing 10 of the rope brake is pivoted and here the cable pull and thus the braking force in the direction of arrow 22a is reduced. This reduction in braking force also arises when Arrangement according to Figure 5 by the reduced vectorial Brake component of the cable after the actuation lever 43 has tilted and the housing 10 in the direction of arrow 43c. Here also plays Location of the mounting opening 72 a role, because the braking force is at same clamping effect of the web 18, the lower the further Fastening opening 72 for the load to be braked in the direction of the arrow 22b is shifted relative to the pinching point of the rope. The Attachment takes place in such a way that when securing a ahead or subsequent person that led through the mounting opening 72 Fasteners with a fixed point or with the body of the securing person is connected.

Due to the inventive arrangement of the spring 32 in one preferably designed as a blind hole 44 in Operating lever 43 is in addition to other undesirable effects on the spring 32 the same also before contact with the or used ropes and any damage caused thereby protected. When a braking force occurs, the Guide element 28 via the stop nut 33a in the spring Blind hole 44 compressed, at the same time the guide element 28 partially pressed into the blind hole 44 inside the spring 32 becomes.

Claims (36)

Rope brake, in particular for synthetic fiber ropes such as climbing ropes or the like, with a housing which has a guide device for at least one rope, which can exert a braking effect on the rope, characterized in that the guide device (14, 16, 18) has at least one opening (14 , 16) for the passage of at least one rope loop (20, 22) which surrounds a web (18) spanning the opening (20, 22) and moving in the plane defined by the rope loop. Cable brake according to claim 1, characterized in that the opening (14, 16) in the housing (10) is designed like an elongated hole. Cable brake according to claim 1 or 2, characterized in that two openings (14, 16) for the passage of two cable loops (20, 22) are arranged next to one another and are jointly spanned by the web (18). Cable brake according to claim 3, characterized in that the web (18) can be applied to two edge sections (10b) of the housing (10). Cable brake according to claim 3, characterized in that the web (18) can be placed on two edge sections (10b) and on a central section (10c) of the housing (10) between the openings (14, 16). Cable brake according to one of the preceding claims, characterized in that the web (18) is displaceable in the direction of the opening (14, 16) in the housing (10). Cable brake according to claim 6, characterized in that the web (18) is displaceable in the direction of the opening (14, 16) in the housing and can be pivoted with respect to the opening (14, 16). Rope brake according to claim 1, characterized in that the web (18) rests under rope load on the housing (10) and is guided thereon. Cable brake according to claim 1, characterized in that the web (18) is guided in the working area of the cable input and cable output against pivoting on the housing ribs (24, 26). Cable brake according to claim 1, characterized in that the web (18) is coupled via a guide element (28) to a bearing block (30) in which it is held in a longitudinally displaceable and / or pivotable manner. Cable brake according to claim 10, characterized in that the web (18) is coupled to the bearing block (30) via the guide element (28) and a spring (32) arranged between the web (18) and the bearing block (30). Cable brake according to claim 10, characterized in that the guide element (28) in a bearing pin (40) of the bearing block (30) is pivotally and longitudinally displaceable. Cable brake according to one of claims 9 to 12, characterized in that the web (18) is secured against pivoting in the region of the cable input and output via the guide element (28) on the bearing block (30). Cable brake according to claim 1, characterized in that a fastening device (12, 42, 44) can be attached to the housing (10) at different longitudinal and / or transverse distances from the braking position of the web (18). Rope brake, in particular for synthetic fiber ropes such as climbing ropes or the like, with a housing which forms at least one opening for the passage of at least one rope loop, and with a guide device for the rope which encompasses a web spanning the opening and movable in the plane defined by the rope loop , characterized in that at least one further recess (60, 62) is provided on the housing (10) for the additional guidance and / or deflection of a single or double rope (20, 22). Cable brake according to claim 15, characterized in that the recess (60,62) is open. Cable brake according to claim 15 or 16, characterized in that the recess (60,62) is sector-shaped oval to circular. Cable brake according to claim 15, characterized in that each cable passage opening (14, 16) of the housing (10) is assigned an additional recess (60, 62) on the housing (10) for guiding and / or deflecting the cable (20, 22). Cable brake according to claim 15, characterized in that the additional recess (s) (60, 62) serves to guide and / or deflect the brake cable (22). Cable brake according to claim 15, characterized in that the additional recess (60, 62) on the housing edge (64) is arranged opposite to the suspension point (66) of the load or of the body to be secured. Cable brake according to claim 15, characterized in that a lever (43) serving as a locking device and / or actuating device is pivotably arranged in the region of the recess (s) (60, 62) Rope brake, in particular for synthetic fiber ropes such as climbing ropes or the like, with a housing which forms at least one opening for the passage of at least one rope loop, and with a guide device for the rope which encompasses a web spanning the opening and movable in the plane defined by the rope loop , characterized in that at least one stop (23a, b) for the web (18) is provided on the housing (10), which stops the web (18) in the direction of movement (22a) of the web (18 ) before reaching its end position possible due to the deformability of the rope. Cable brake according to claim 22, characterized in that a stop (23a, b) protruding into the movement path (22a, 33) of the web (18) is provided on each side of the housing (10). Cable brake according to claim 23, characterized in that the stops (23a, b) each protrude at the same height into the movement path (22a, 33) of the web (18). Cable brake according to one of the preceding claims 22 to 24, characterized in that the web (18) rests under load with its two outer ends against two stops (23a, b) projecting inwards from the housing walls. Cable brake according to one of Claims 22 to 24, characterized in that the web (18) acts on the stops (23a, b) in the region of lateral guide sections (10a, b) of the housing (10). Cable brake according to one of claims 22 to 24, characterized in that the stops (23a, b) in their extension perpendicular to the movement path (22a, 33) of the web (18) correspond approximately to one to two times the thickness of the web (18). Cable brake according to one of claims 22 to 24, characterized in that the stop surfaces of the stops (23a, b) run approximately perpendicular to the movement path (22a, 33) of the web (18). Rope brake, in particular for synthetic fiber ropes such as climbing ropes or the like, with a housing which forms at least one opening for the passage of at least one rope loop, and with a guide device for the rope which surrounds a web spanning the opening and movable in the plane defined by the rope loop , which is displaceable in the direction of the opening against the force of a spring, characterized in that the spring (32) is arranged concealed in the housing (10). Cable brake according to claim 29, characterized in that the spring (32) is at least partially arranged in a cavity of an actuating lever (43). Cable brake according to claim 30, characterized in that the spring (32) is at least partially arranged in a blind hole (44) of an actuating lever (43). Cable brake according to claim 29, characterized in that the spring (32) is designed as a helical compression spring. Cable brake according to claim 29 or 30, characterized in that a guide element (28) for the brake web (18) extends into the spring (32) and / or into the cavity (44) of the actuating lever (43). Cable brake according to one of claims 29 to 32, characterized in that the spring (32) is supported on the one hand on a bearing block (30) for the actuating lever (43) and on the other hand in the cavity (44) of the actuating lever (43). Cable brake according to claim 29, characterized in that the bias of the spring (32) is adjustable. Cable brake according to claim 35, characterized in that the prestressing of the spring (32) can be adjusted by means of a stop nut (33a) which is adjustably arranged on the guide element (28) of the brake web (18).

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