초록 ▼

The invention relates to a climbing aid for ladders or the like, comprising an endless traction means running between guide pulleys, from which a person may optionally hang by means of a suspension device, with a drive device (20) comprising a drive motor (21), by means of which one of the guide pul

The invention relates to a climbing aid for ladders or the like, comprising an endless traction means running between guide pulleys, from which a person may optionally hang by means of a suspension device, with a drive device (20) comprising a drive motor (21), by means of which one of the guide pulleys may be driven as the drive disc (12) for the drive means (13), with a traction force limitation device and with a device for switching the drive device on/off, which can be actuated by the endless traction means (13). According to the invention, the traction force limitation device consists of a slip clutch (30) with torque limitation interposed between the drive disc (12) and the drive motor (21), and the device for switching the drive device on/off comprises sensor means (70) with which a movement of the traction means (13) can be detected, whereby the sensor means (70) are formed in such a manner that a detection of a sensor pulse switches the drive motor (21) on and an absence of sensor pulses within a time span switches the drive motor (21) off.

대표청구항 ▼

The invention claimed is: 1. In combination, a ladder, a vertical ladder, or a vertical iron gangway and a climbing aid for the ladder, the vertical ladder or the vertical iron gangway, the combination comprising: an upper guide pulley; a lower guide pulley, wherein one of the guide pulleys is a dr

The invention claimed is: 1. In combination, a ladder, a vertical ladder, or a vertical iron gangway and a climbing aid for the ladder, the vertical ladder or the vertical iron gangway, the combination comprising: an upper guide pulley; a lower guide pulley, wherein one of the guide pulleys is a drive disc; an endless traction means running between the upper guide pulley and the lower guide pulley from which a person can hang by a suspension device; a drive device including a drive motor which drives the drive disc which drives the traction means; a drive force limitation device including a slip clutch with torque limitation interposed between the drive disc and the drive motor; and a device for switching the drive device on and off which is actuated by means of the endless traction means, wherein the device for switching the drive device on and off includes a sensor with which movement of the traction means can be detected and a pulse generation element which is directly connected to the drive disc, whereby the sensor further includes a pulse detector which senses a sensor pulse from the pulse generation element that switches the drive motor on, and an absence of detecting a subsequent sensor pulse within a time span switches the drive motor off. 2. The combination according to claim 1, wherein the pulse detector is a stationary pulse detector. 3. The combination according to claim 1, wherein the pulse generation element comprises a cam on the drive disc and wherein the pulse detector comprises a key switch. 4. The combination according to claim 1, wherein the pulse generation element comprises at least one of a cam, a groove, a bore, a magnet or a mirror at the drive disc and the pulse detector comprises at least one of a key switch, a micro switch, a sliding contact switch, a magnetic field switch, a sound detector and a photo sensor switch. 5. The combination according to claim 1, wherein a complete revolution of the drive disc activates the sensor pulse. 6. The combination according to claim 1, wherein the slip clutch comprises a first clutch disc which is mounted on a drive shaft driven by the drive motor with interposition of a free-wheel for a rotary direction, whereby the drive disc is an opposite clutch disc and is mounted on the drive shaft in a rotatable manner. 7. The combination according to claim 6, wherein a sealed chamber is formed between the first clutch disc and the opposite clutch disc, wherein the sealed chamber is filled with oil. 8. The combination according to claim 1, wherein the drive motor and the slip clutch connect to a mounting unit which is mounted in a fixed and non-tiltable manner in a housing. 9. The combination according to claim 1, wherein the traction means circulates under tension between the upper guide pulley and the drive disc, whereby a starting length of the traction means when un-tensioned is shorter than a sum of a twofold distance between pivot centers of the guide pulleys, an effective deflecting circumference at the upper guide pulley and an effective deflecting circumference at the lower guide pulley. 10. The combination according to claim 9, wherein with tension of the traction means, a starting length of the traction means is extended about 0.5-5% of a circulation length. 11. The combination according to claim 1, wherein the traction means comprises a material which is reversibly expandable or reversibly compressible. 12. The combination according to claim 1, wherein the traction means comprises a circular belt. 13. In combination, a ladder, a vertical ladder, or a vertical iron gangway and a climbing aid for the ladder, the vertical ladder or the vertical iron gangway, the combination comprising: an upper guide pulley; a lower guide pulley, wherein one of the guide pulleys is a drive disc; an endless traction means running between the upper guide pulley and the lower guide pulley from which a person can hang by a suspension device; a drive device including a drive motor which drives the drive disc which drives the traction means; a drive force limitation device including a slip clutch with torque limitation interposed between the drive disc and the drive motor; and a device for switching the drive device on and off which is actuated by means of movement of the endless traction means, wherein the device for switching the drive device on and off includes a sensor that generates sensor pulses as a result of rotation of the drive disc, whereby the sensor further includes a pulse detector which senses each of the sensor pulses which does one of switching the drive motor on and maintaining the drive motor on, and an absence of detecting sensor pulses within a time span while the motor is on switches the drive motor off. 14. The combination according to claim 13, wherein the sensor includes a pulse generation element directly connected to the disc drive. 15. The combination according to claim 14, wherein the pulse generation element comprises a cam on the drive disc and wherein the pulse detector comprises a key switch. 16. The combination according to claim 14, wherein the pulse generation element comprises at least one of a cam, a groove, a bore, a magnet or a mirror at the drive disc and the pulse detector comprises at least one of a key switch, a micro switch, a sliding contact switch, a magnetic field switch, a sound detector or a photo sensor switch. 17. The combination according to claim 13, wherein a complete revolution of the drive disc activates one of the sensor pulses. 18. The combination according to claim 13, further comprising a roll abutting the traction means and rotating with the movement of the traction means, and wherein the sensor includes a pulse generation element directly connected to the roll.