Patent Application
20200114183
The invention relates to a cable holder and a running element for a cable system of an anti-fall device.
With known anti-fall devices with essentially horizontally arranged cables, there is a risk of canting of a running element with a cable holder when the running element is guided over a cable holder. This also applies when the running element, which is frequently a slit-type opening, has a so-called longitudinal slit running parallel to a cable in the cable holder, is arranged in an angular position that lies between 90° and 180° in relation to a holder for a carabiner or similar. This observation of the angular position is made with a cross-section profile at right angles to the longitudinal axis of the running element.
It has also been found that with such an angular position of the longitudinal slit, the cable holder cannot be mounted with a perpendicular running connecting piece, but always in the corresponding angular position when the holder of the running element should itself be kept vertical. However, this is a disadvantage due to the construction.
If a force acts on the running element in the direction of rotation of the running element on the cable while said running element is being guided over the cable holder, flexural forces act on the cable holder, and thus on the connecting piece, which can lead to a deformation of the cable holder, in particular of the connecting piece of the cable holder.
Accordingly, the object of the invention is to provide a running element and a cable holder for an anti-fall device with which a canting of the cable holder with the running element is avoided and the risk of a deformation of the cable holder as a result of the flexural forces acting on it is reduced.
The object is realized according to the invention by means of the features of main claim 1 and the subsidiary claim 8. Further designs of the invention are described in the subclaims. Accordingly, the cable holder according to the invention has the following features.
Accordingly, the cable holder for an anti-fall device is reversibly rotatably supported and the axis of rotation of the cable holder is offset parallel to a cable.
In a further design of the invention, the cable holder has a console for a reliable form- and/or force-fit arrangement on a building structure, and a cable retainer. The cable retainer and the console are here connected to each other. The cable retainer is reversibly rotatably supported on the console. The axis of rotation of the cable retainer is offset parallel to a cable or to its holder. Here, it is assumed that the cable does not have a kink.
In order to ensure reversibility, the cable retainer and/or the console has at least one spring element. According to the invention, any known spring element may be used that is suitable for the construction.
In a further design, the cable retainer has a cable guide and a connecting piece, wherein the cable guide connects to the connecting piece at its free end facing away from the console. The connecting piece has a curved section, for example offset parallel in the cable direction, which connects to the cable guide and which extends in the direction of the console.
Here, the curved section generally connects with a running element on a contact area of the connecting piece when the running element functionally lies on the cable guide.
This can be a corrugation or an arch-shaped recess, for example. Offset parallel in the cable direction means that a longitudinal side or an axis of a cross-section profile of the connecting piece with its curved section runs parallel or essentially offset parallel to the cable. Preferably, the connecting piece, and therefore also the curved section, is arranged on the cable guide at right-angles to the cable guide.
The curved section of the connecting piece points in the direction of rotation of the cable holder in relation to an initial position which the cable holder adopts without a force effect. It is elevated in the angle of rotation, the direction in which the spring element is tensioned, as a result of which a particularly effective spring effect of the cable retainer is guaranteed. As a result of the curved section, the connecting piece has a spring effect and can thus provide a spring effect in addition to the reversibly rotatable support.
In one design of the invention, the cable holder does not have a cable holder supported in a reversibly rotatable manner. The cable guide has just one connecting piece, wherein the cable guide connects to the connecting piece as described and the connecting piece in a contact area with a running element offset parallel in the cable direction has the curved section described above. This then alone provides a spring effect of the connecting piece, and thus of the cable holder.
In both variants described above, it can therefore be provided that the curved section of the connecting piece forms a chamfer as a first guide for a running element, so that this can largely glide over the cable holder without jolting.
Here, it can additionally be provided that the cable guide—in the direction of rotation of the cable holder in relation to an initial position—has, at a transition point to the connecting piece with its curved section and opposite the chamfer, an elevation, such as a cam. A second guide can thus be formed together with the curved section of the connecting piece, which further supports the largely jolt-free gliding of the running element over the cable holder. Here, “opposite” means that the elevation is located on a surface of the curved section opposite the chamfer.
Further, in order to optimize gliding over, it can be provided that the front sides of the cable retainer, in particular of the cable holder, have an acute angular position in relation to the progression of the cable, in other words, they are chamfered surfaces. This also applies to the connecting piece.
It can also be provided that the first guide and the second guide are formed differently in respect of their cross-section profile. This guarantees that a running element can always only be guided over the cable guide in a predetermined arrangement. This serves to prevent a situation in which with a possible inverted introduction of the running element onto the cable, an angular position that is atypical for the device can be produced while being guided over the cable holder, with which, for example, a different leverage effect is produced when tensile forces act on the running element while being guided over the cable holder running radially to the cable. In cases of inverse guiding, the position can be so unfavorable that a guiding of the running element over the cable holder entails a large amount of effort for a person to be secured, since the running element must first be brought into an untypical position for the guiding. The aim is to prevent this with the solution.
Furthermore, the object is attained by means of a running element for an anti-fall device with a cable holder as described above—regardless of the form, but equipped with a first and a second guide—wherein the running element, as is known, has a longitudinal slit in a state that is functionally arranged on a cable running parallel to a cable of the cable holder. Here, the longitudinal slit is placed on a longitudinal side of the running element and laid in a defined angular position in relation to a retainer for a carabiner or similar between 90° and 180°, advantageously at 112°. Here, the running element has a first and an additional longitudinal slit edge. The first longitudinal slit edge is designed with regard to its form to correspond with the first guide of the cable holder, and the second longitudinal slit edge is designed with regard to its form to correspond to the second guide of the cable holder. This observation is made with a cross-section profile at right angles to the longitudinal axis of the running element. Here, it is further provided that the first longitudinal slit edge can interact with the first guide, and the second longitudinal slit edge can interact with the second guide in an easy clearance fit when the running element lies on the cable holder, i.e. the cable guide, as for a gliding over of the cable guide by the running element. A clearance fit in the sense of the invention means such a fit in which an easy gliding over is ensured and a canting of the running element is precluded. To this extent, depending on the specific design of the cable holder and its cable guide and of the running element, there is a certain degree of design flexibility.
The corresponding design described above, when the running element is laid on the cable guide, means that as a result, a form fit with a clearance fit of the running element with the cable guide is ensured during axial rotation, i.e. supported on the cable during rotation and the axis of the cable. As a result, the spring effect described above of the curved section or the connecting piece can fully take effect, in addition to the rotatably supported cable holder or cable retainer. This guarantees a minimization of canting at an angle to the running direction of the running element due to the guide thus created and its reversibly rotatable arrangement.
In a further design, front sides of the running element have an acute angular position in relation to the progression of the cable. These are chamfered surfaces, which provides an easy, jolt-free alignment of the running element with the cable retainer during guiding of the running element over the cable holder.
The invention will now be explained below on the basis of an exemplary embodiment, with reference to the figures. Here, additional advantages, features and designs of the invention are described.
In the figures:
In
In the exemplary embodiment, the cable holder 1 for an anti-fall device has a console 4 for the secure functional arrangement on a building structure and a cable retainer 5.
The cable retainer 5 and the console 4 are here connected to each other. The cable retainer 5 is reversibly rotatably supported on the console 4. The axis of rotation 2 of the cable holder 4 or the cable retainer 5 is laid offset parallel to a cable 3 as shown in
Further, the cable retainer 5 has a cable guide 7 and a connecting piece 8, wherein the cable guide 7 connects to the connecting piece 8 as shown in the figures. The connecting piece 8 has a curved section 10 with a running element 9 as a separate component, offset parallel in the cable direction. The curved section 10 of the connecting piece 8 points in the direction of rotation of the cable holder 1 in relation to an initial position of the cable holder 1. The initial position is shown in
The curved section 10 is elevated in the direction of rotation, as a result of which a spring effect of the connecting piece 8 and thus of the cable retainer 5 is guaranteed—even when this is generally lower in relation to a rotatable support. Thus, in addition to the reversible rotatable support of the cable retainer 5, a spring effect of said retainer is provided.
Furthermore, the curved section 10 of the connecting piece 8 forms a chamfer 11 as the first guide 13 for the running element 9, so that this can glide over the cable holder 1 in a largely jolt-free manner.
Further, the cable guide 7—in the direction of rotation of the cable holder 1, more precisely its cable retainer 5, in relation to the known initial position according to
The first guide 13 and the second guide 14 are here formed differently with regard to their cross-section profile.
In the exemplary embodiment, the running element 9 that is arranged or arrangeable on the cable holder 1 has, as is known, a longitudinal slit 15 running parallel to the cable 3 of the cable holder 1,
Here, it is provided that the first longitudinal slit edge 17 interacts with the first guide 13 and the second longitudinal slit edge 18 interacts with the second guide 14 in an easy clearance fit, when the running element 9 lies on the cable holder 1, as it does for a gliding over of the cable holder 1 and thus also of its cable guide 7 by the running element 9.
This design of the components, which corresponds to the form, means, as already explained above, that a form fit of the running element 9 with the cable holder 1 with a clearance fit is ensured when the running element 9 lies on the cable holder 1. The form fit prevents or minimizes canting. If tensile forces from a cable 3 of a fall arrest device laid on the retainer 16 are then emitted in the direction of rotation of the cable retainer 1, this leads to the rotation of the cable retainer 5, and if due to the design the reversible rotation is limited at a stop or other element, in other words, by the design of the spring element 6, this enables the described spring effect of the curved section 10 or the connecting piece 8 to have an additional effect after such a stop has been reached. This provides a reduction of the risk of canting of the running element 9 at an angle to its running direction. Thus, a reversibly movable, rotatable guide is created, which simplifies a guiding of the running element 9 over the cable holder 1.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2017 004 948.3 | May 2017 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IB2018/000809 | 5/18/2018 | WO | 00 |
