Brake disc for a rope brake for rope climbing, rope brake for rope climbing, and method for retrofitting a rope brake

Description

Technical area

[0001] The invention described here relates to a brake disc for a rope brake for rope climbing. Furthermore, the invention relates to a rope brake for rope climbing with the brake disc and a method for retrofitting a rope brake with the brake disc. State of the art

[0002] A rope brake known from the state of the art is in the Figures 1A to 1Cshown. This rope brake, known from the prior art, has a circular brake disk 12 and a circular control disk 13 along or around which the rope 50 runs through the rope brake. The brake disk 12 and the control disk 13 thus each have the contour or outline of a circle. The rope 50 has a first rope end 18, which is attached to the belayer, who is usually standing on the ground. The rope 50 also has a second rope end 11, which is attached to the climber. The second rope end 11 is thus the rope end that is pulled and can be taut and is therefore referred to as the load side. The first rope end 18, on the other hand, is the loose, undrawn, sagging rope end and is therefore referred to as the slack side.The rope brake typically further comprises a safety pin 14 and a cheek 15 having an opening 15a for passing a carabiner 17 through, wherein the carabiner 17 is in turn attached to a plate 16 attached to a (rock) wall 60. The rope brake typically hangs from an intermediate anchor. Another prior art example is GB2441140A.

[0003] This rope brake can in principle be in three positions, namely the one in Figure 1A shown rest position and the one shown in the Figures 1A and 1B illustrated working positions 1 and 2. In the rest position, the rope 50 runs load-free through the rope brake and there is only little friction on the brake disc 12 and the control disc 13. While in the working position 1 the rope 50 still runs through another carabiner located above the rope brake on the wall 60, this is not the case in the working position 2 and the rope brake serves as a deflection in the working position 2 as in Figure 1Cshown.

[0004] A climber's fall during rope climbing can essentially be divided into three phases. In the first phase, the climber loses his grip and begins to fall. The belayer may notice the climber's fall and prepares for the impact force. In the second phase, the rope 50 is taut between the climber and the belayer and between the brake disc 12 and the control disc 13. The rope brake rotates via the normal force between the brake disc 12 or control disc 13 and the rope 50 (see Fig. 1B). The rope brake is pulled until the intermediate protection, such as carabiner 17 and plate 16, holds the rope brake back. The belayer is slightly pulled along by the climber's kinematic energy; the rope stretch acts as a cushion for both climber and belayer. This is the moment of the impact force or pull of the fall. The belayer is accelerated to the speed of the falling climber. In the third phase, the friction in the rope brake system converts the kinetic energy into heat and, if necessary, other forms of energy such as the belayer's potential energy, and the falling climber is slowed down.

[0005] By turning the rope brake from the rest position to the working position (see Fig. 1B) the slack rope is shortened. With the tension in the rope, the rope brake is pulled into the working position, and a portion of the energy from the impact force or fall pull can be dissipated from the rope via the rope brake in the form of friction. A portion of the forces acting in the rope 50 are dissipated via the friction of the rope brake until the system has come to a standstill.

[0006] However, it has been shown that certain larger weight differences between a heavy climber and a lighter belayer make it more difficult for the climber to be stopped by such rope brakes during a fall. Brief description of the invention

[0007] The invention is based on the object of finding means that make it possible to secure climbers with an even greater mass than the belayer during rope climbing.

[0008] This object is achieved by using the brake disc according to the invention instead of the circular brake disc 12. The brake disc according to the invention can be used in a cable brake known from the prior art, such as the one shown in the Figures 1A to 1C described cable brake. The object is therefore achieved by the brake disc according to the invention, the cable brake according to the invention, and the method according to the invention.

[0009] The brake disc according to the invention for a rope brake for rope climbing comprises: a first section for supporting a rope on the brake disc, wherein the first section is a first circular arc of a first circle with a first radius; and a second section for supporting the rope on the brake disc, wherein the second section is arranged adjacent to the first section; wherein the brake disc is characterized in that the second section is a second circular arc of a second circle with a second radius, wherein the second radius is greater than the first radius.

[0010] The rope brake according to the invention for rope climbing is characterized in that the rope brake comprises the brake disc according to the invention.

[0011] The method according to the invention is for retrofitting a cable brake, wherein the cable brake comprises a fastening device for a brake disc, the method comprising: fixing the brake disc according to the invention to the fastening device.

[0012] Accelerations on the belayer are reduced when the rope brake responds more quickly. A lever arm between the pivot point of the rope brake and the driven brake disc creates a moment that rotates the rope brake into the path of the rope. This rotation removes slack rope from the system, and the rope's wrap angles on the brake disc and the control disc increase (see Fig. Fig. 1A with Fig. 1B, 1C). The larger this lever arm can be left, the more strongly the rope brake is pulled into the rope path. According to the brake disc according to the invention, the lever arm does not decrease as much or as quickly when the rope brake is screwed in compared to the circular brake disc 12 known from the prior art, so that the rope brake can be screwed in faster and further and the angle of wrap of the rope around the brake disc and control disc is greater, so that greater weights or weight differences can be absorbed by the rope brake when the climber falls. The brake disc according to the invention decouples more force from the rope and less energy from the impact force reaches the belayer, who is therefore also accelerated less. From the belayer's point of view, the fall is therefore better controllable.

[0013] According to preferred embodiments of the brake disc according to the invention, the brake disc further has a third section for supporting the cable on the brake disc, wherein the third section is a third circular arc of a third circle with a third radius, wherein the third section is arranged adjacent to the first section and wherein the third radius is smaller than the first radius, whereby the positive effects described above are further enhanced.

[0014] According to preferred embodiments of the brake disc according to the invention, the second section is a section of the surface of the brake disc and has a rope channel with a wave-shaped contour, whereby the rope adapts to the brake disc when the climber falls and the friction values, in particular in the working position 2 ( Fig. 1C ), may be further increased.

[0015] These optional preferred features can be combined with one another. Further optional preferred features are described in the following part of the description, resulting in further advantages for those skilled in the art. Brief description of the drawings

[0016] Figure 1A shows the rest position of a rope brake known from the state of the art. Figure 1B shows a first working position of the rope brake known from the state of the art. Figure 1C shows a second working position of the rope brake known from the state of the art. Figure 2 shows the brake disc 10 according to the invention in a state in which it is installed in the cable brake 100 according to the invention and is exemplary in the working position according to Figure 1C is located. Figure 3 shows the brake disc 10 according to the invention. Figure 4 shows the brake disc 10 according to the invention in a preferred embodiment. Figure 5shows the brake disc 10 according to the invention in a preferred embodiment of the brake disc 10 as in Figure 3 shown. Figure 6A shows a front view of the brake disc 10 according to the invention in the preferred embodiment according to Figure 5 . Figure 6B shows a vertical section through the design of the brake disc according to the invention in the preferred embodiment according to Figure 2A along the axis AA shown in Figure 2A.

[0017] Features with the same reference symbols in the Figures 1A to 6B are identical, so that the Figures 1A to 1C described characteristics also for the Figures 2 to 6B apply, provided they are used there with the same reference symbols. Detailed description

[0018] Figure 3 shows the brake disc 10 according to the invention for a rope brake 100 for rope climbing. Figure 2shows the brake disc 10 according to the invention in a state in which it is installed in the cable brake 100 according to the invention and is exemplary in the working position according to Figure 1C is located.

[0019] The brake disc comprises: a first section 1 for supporting a cable 50 on the brake disc 10, wherein the first section 1 is a first circular arc of a first circle K1 with a first radius R1; and a second section 2 for supporting the cable 50 on the brake disc 10, wherein the second section 2 is arranged adjacent to the first section 1; wherein the brake disc 10 is characterized in that the second section 2 is a second circular arc of a second circle K2 with a second radius R2, wherein the second radius R2 is greater than the first radius R1, wherein preferably the ratio of the second radius to the first radius is (approximately) 1 to 1 / 2.

[0020] The first section 1 and the second section 2 can be sections of the surface of the brake disk 10 and the second section 2 can be arranged downstream of the first section 1 from the viewpoint of the slack side 18 of the rope to the load side 11 of the rope. The second rope end 11 is the rope end that is pulled and can be taut and is therefore referred to as the load side. The first rope end 18, on the other hand, is the loose, non-pulled, sagging rope end and is therefore referred to as the slack side. The first rope end 18 can also be referred to as the rope 50 running into the rope brake 100 or brake disk 10 and the second rope end 11 can also be referred to as the rope 50 running out of the rope brake 100 or brake disk 10. The rope end 11 is for attachment to the climber and the rope end 18 is for attachment to the belayer.Rope brake usually has a further disc 13 (control disc) and the brake disc 10 and the further disc are arranged within the rope brake 100 in such a way that the rope 50 can be introduced from the direction of the belayer (slack side) via the further disc 13 into the rope brake 100, is guided onto the first section 1 of the brake disc and is deflected at the brake disc 10 in order to leave the rope brake 100 in the direction of the climber (load side).

[0021] The first circular arc and the second circular arc can be arranged adjacent to each other and are preferably connected to each other by a tangent 25a, 25c.

[0022] As in Figure 4In a preferred embodiment, the brake disc 10 can further comprise a third section 3 for supporting the cable 50 on the brake disc 10, wherein the third section 3 is a third circular arc of a third circle K3 with a third radius R3, wherein the third section 3 is arranged adjacent to the first section 1 and wherein the third radius R3 is smaller than the first radius R1 and the second radius R2, wherein for the effect of the brake disc the ratio of the second radius to the first radius to the third radius is particularly preferably (approximately) 1 to 1 / 2 to 1 / 3.

[0023] The third section 3 can be a section of the surface of the brake disc 10, and the first section 1 can be arranged downstream (and adjacent to) the third section 3, viewed from the slack side 18 of the rope to the tight side 11 of the rope 50. The first circular arc and the third circular arc can be arranged adjacent to one another and are preferably connected by a tangent.

[0024] The first section 1, the second section 2 and possibly the third section 3 can be referred to as the front side of the brake disc 10, while the Figures 2 to 6B The fourth section 4 shown can be referred to as the back of the brake disc 10. The shape of section 4 can be arbitrary. The cable 50 runs into the cable brake 100, possibly without touching the fourth section 4, and runs out of the cable brake 100 again via sections 1, 2, and possibly 3 of the brake disc 10, on which the cable 50 rests.

[0025] In each of the Figures 2 to 6B In the embodiments described, the centers M1, M2, and M3 of the circles K1, K2, and K3, respectively, can be arranged spatially separate from one another. The arrangements of the centers shown in the figures are exemplary but not essential to the invention.

[0026] In each of the Figures 2 to 4 In the embodiments described, the second section 2 can be a section of the surface of the brake disc 10 and can have a cable channel 20 with a wave-shaped contour, as is also shown in the Figures 5 to 6B shown and described.

[0027] Figure 5 shows the brake disc 10 according to the invention, as in Figure 3 shown, additional with rope channel 20.

[0028] Figure 6A shows a front view of the brake disc 10 according to the invention in the preferred embodiment according to Figure 5 . Figure 6Bshows a vertical section through the design of the brake disc according to the invention in the preferred embodiment according to Figure 2A along the axis AA shown in Figure 2A.

[0029] How Figures 5 to 6B As shown, the cable channel 20 can have one or more (any number of) recesses 21a, 21b, 21c on the surface of the brake disc 10, wherein each of the recesses 21a, 21b, 21c can be delimited by two constrictions 22a, 22b, 22c, 22d. The cable channel 20 can also have one or more recesses that are delimited only on one side by a constriction 22a, 22d and terminate at another end in the surface of section 2 of the brake disc 10.

[0030] The one or more recesses 21a, 21b, 21c with the respectively adjacent constrictions 22a, 22b, 22c, 22d can be adapted such that in the case of a load, the rope structure or the sheath of the rope 50 resting in the rope channel 20 is compressed and the section of the rope 50 with the compressed rope structure or the compressed rope sheath is pressed into one or more of the recesses 21a, 21b, 21c.

[0031] The one or more recesses 21a, 21b, 21c can comprise a first recess 21a, 21b and a second recess 21b, 21c, wherein, from the viewpoint of the slack side 18 of the cable 50 to the tight side 11 of the cable 50, the second recess 21b, 21c is arranged following the first recess 21a, 21b and preferably adjacent (as in the case of recess 21b in relation to recess 21a or in the case of recess 21c in relation to recess 21b) on the surface of the brake disc 10, and between the first recess 21a, 21b and the second recess 21b, 21c there is one (22b or 22c) of the constrictions 22a, 22b, 22c, 22d, which define the first recess 21a from the second recess 21b, 21c.

[0032] The rope 50 can run onto the constriction on the side of each of the constrictions 22a, 22b, 22c, 22d facing the slack strand 18 of the rope 50 and run off the constriction on the side of each of the constrictions 22a, 22b, 22c, 22d facing the tight strand 11 of the rope 50.

[0033] The one or more recesses 21a, 21b, 21c with the respectively adjacent constrictions 22a, 22b, 22c, 22d can be adapted such that, in the case of a load, the rope structure or the sheath of the rope 50 resting in the rope channel 20 is compressed more within a first of the recesses 21a, 21b, 21c and the compressed rope 50 is pressed or pulled more into the recess than within a second of the recesses 21a, 21b, 21c.

[0034] When the climber falls, the rope 50 is pulled into the wave-shaped rope channel 20. Due to the friction on the flanks of the one or more recesses in the rope channel 20, the rope structure is deformed or compressed, or the rope sheath is pushed back or compressed relative to the rope core. The section of the rope 50 with the deformed rope structure or pushed back or compressed rope sheath presses into one or more of the recesses 21a-c in the rope channel, thereby increasing the frictional force acting on the rope 50.

[0035] Both the contour 23a of the first recess 21a and the contour 23b, 23c of the second recess 21b, 21c can each have the shape of a surface section of an ellipsoid, wherein a first angle α1 is provided between a main axis 24a of the ellipsoid of the first recess 21a and a tangent 25a to the second circular arc in the region of the first recess 21a, wherein a second angle α2 is provided between a main axis 24c of the ellipsoid of the second recess 21c and a tangent 25c to the second circular arc in the region of the second recess 21c, and wherein the first angle α1 is greater than the second angle α2, wherein the first angle and the second angle are each particularly preferably between 10° and 90° for the effect of the brake disc.

[0036] Since the main axes 24a, 24c run parallel to one another, the angle α between the tangent 25a, 25c and the main axis 24a, 24c changes such that the gradient which the constrictions 22a-d present to the incoming rope 50 is initially steep and then becomes increasingly flatter. The rope 50 is therefore initially pressed strongly into the respective recess 21a-c along the second section 2 from the direction of the slack side to the load side and then is drawn less and less into the respective recess 21a-c in the direction of the load side. If the rope 50 is loaded, this creates an increased frictional force acting on the rope 50. If the rope 50 is relieved, however, the rope 50 can be freely lifted out of the rope channel 20 again.

[0037] The rope brake 100 according to the invention for rope climbing is characterized in that the rope brake 100 comprises the brake disc 10 according to the invention according to any of the embodiments described herein.

[0038] The method according to the invention is for retrofitting a cable brake 100, wherein the cable brake 100 includes a fastening device 30 (e.g., a screw) for a brake disc, the method comprising: fixing the brake disc 10 according to any of the embodiments described herein to the fastening device 30. The brake disc according to the invention can have an opening 40 for fastening to the fastening device 30. The brake disc according to the invention can be made of a metal.

[0039] The numerical values ​​mentioned herein are exemplary but not essential to the invention.

[0040] The detailed description and the drawings describe preferred embodiments and aspects of the invention defined by the following claims. The (optional or preferred) features disclosed in the above description, claims, and drawings may be used individually or in any combination to implement the invention defined here according to the appended claims.

Claims

1. A brake disc (10) for a rope brake (100) for rope climbing, the brake disc (10) comprising: a first portion (1) for supporting a rope (50) on the brake disc (10), wherein the first portion (1) is a first circular arc of a first circle (K1) having a first radius (R1); a second portion (2) for supporting the rope (50) on the brake disc (10), wherein the second portion (2) is arranged adjacent to the first portion (1); wherein the second portion (2) is a second arc of a second circle (K2) having a second radius (R2), wherein the second radius (R2) is larger than the first radius (R1), and wherein the first portion (1) and the second portion (2) are portions of the surface of the brake disc (10) and the second portion (2) is arranged following the first portion (1) from the view of the slack strand (18) of the rope to the load strand (11) of the rope; a third portion (3) for supporting the rope (50) on the brake disc (10), characterized in that the third portion (3) is a third arc of a third circle (K3) having a third radius (R3), wherein the third portion (3) is arranged adjacent to the first portion (1), wherein the third radius (R3) is smaller than the first radius (R1), and wherein the third portion (3) is a portion of the surface of the brake disc (10) and the first portion (1) is arranged following the third portion (3) from the view of the slack strand (18) of the rope to the load strand (11) of the rope (50).

2. The brake disc (10) according to any one of the preceding claims, characterized in that the first arc and the second arc are arranged adjacent to each other and are preferably connected to each other by a tangent (25a, 25c).

3. The brake disc (10) according to any one of the preceding claims, characterized in that the centers (M1, M2, M3) of the circles (K1, K2, K3) are arranged spatially separated from each other.

4. The brake disc (10) according to any one of the preceding claims, characterized in that the second portion (2) is a portion of the surface of the brake disc (10) and comprises a rope channel (20) with an undulating contour.

5. The brake disc (10) according to claim 4, characterized in that the rope channel (20) comprises one or more recesses (21a, 21b, 21c) on the surface of the brake disc (10), wherein each of the recesses (21a, 21b, 21c) is delimited by two narrowings (22a, 22b, 22C, 22d).

6. The brake disc (10) according to claim 5, characterized in that the one or more recesses (21a, 21b, 21c) with the respectively adjacently arranged narrowings (22a, 22b, 22c, 22d) are adapted such that in case of load the rope structure or the shell of the rope (50) resting in the rope channel (20) is compressed and the portion of the rope (50) with the compressed rope structure or the compressed rope shell is pressed into one or more of the recesses (21a, 21b, 21c).

7. The brake disc (10) according to claim 5 or 6, characterized in that the one or more recesses (21a, 21b, 21c) comprise a first recess (21a) and a second recess (21b, 21c), wherein from the view of the slack strand (18) of the rope (50) to the load strand (11) of the rope (50) the second recess (21b, 21c) is arranged following the first recess (21a) on the surface of the brake disc (10) and between the first recess (21a) and the second recess (21b, 21c) one of the narrowings (22a, 22b, 22c, 22d) is located which delimits the first recess (21a) from the second recess (21b, 21c).

8. The brake disc (10) according to any one of claims 5 to 7, characterized in that the rope (50) runs onto the narrowing on the side of each of the narrowings (22a, 22b, 22c, 22d) facing the slack strand (18) of the rope (50) and runs off on the narrowing on the side of each of the narrowings (22a, 22b, 22c, 22d) facing the load strand (11) of the rope (50).

9. The brake disc (10) according to any one of claims 5 to 8, characterized in that the one or more recesses (21a, 21b, 21c) with the respectively adjacently arranged narrowings (22a, 22b, 22c, 22d) are adapted such that in case of load the rope structure or the shell of the rope (50) resting in the rope channel (20) is compressed more within a first of the recesses (21a, 21b, 21c) and the compressed rope (50) is pressed more into the recess than within a second of the recesses (21a, 21b, 21c).

10. The brake disc (10) according to any one of claims 7 to 9, characterized in that both the contour (23a) of the first recess (21a) and the contour (23b, 23c) of the second recess (21b, 21c) each have the shape of a surface portion of an ellipsoid, wherein a first angle (α1) is given between a main axis (24a) of the ellipsoid of the first recess (21a) and a tangent (25a) to the second arc in the region of the first recess (21a), wherein a second angle (α2) is given between a main axis (24c) of the ellipsoid of the second recess (21c) and a tangent (25c) to the second arc in the region of the second recess (21c), and wherein the first angle (α1) is larger than the second angle (α2).

11. A rope brake (100) for rope climbing, characterized in that the rope brake (100) comprises the brake disc (10) according to any one of the preceding claims.

12. A method for retrofitting a rope brake (100), wherein the rope brake (100) comprises a fastening device (30) for a brake disc (10), the method comprising: fixing the brake disc (10) according to any one of claims 1 to 10 to the fastening device (30).