| 摘要 |
In a ladder assistance device, a cable pulled by a controlled driving apparatus is laid in a loop along the height of the ladder, the user being attached to the cable by a lanyard, a sensor element detecting movements along the ladder, a control element controlling the driving apparatus. A remote control activates or deactivates assistance and allows user weight input, the remote control remaining in the reach of the user and including a stop button deactivating assistance and two activation buttons for activation of assistance, one each for “up”/“down”. A memory stores sets of control values for assistance level(s) for each direction of movement, corresponding to at most two levels in the steady state of the assistance. The program of the control element allowing: the selection that corresponds to the user weight, the activation which is only obtained by the activation buttons of the remote control. |
| 主权项 |
1. A device to assist utilization of a ladder, comprising:
a controlled driving apparatus; a cable pulled by the controlled driving apparatus, the cable being laid in a loop along a height of the ladder; a lanyard attached to the cable for attachment to a user; a sensor disposed in the driving apparatus to detect movements of ascent or descent of the user along the ladder; a controller with a determined control program connected to the sensor, the controller being configured for controlling the controlled driving apparatus of the cable according to movements of the user so that when the device is assisting the user, the controlled driving apparatus being configured to drive the cable with determined assistance levels corresponding to pulling forces which are lower than a force of gravity of a weight of the user; a remote control configured for activation or deactivation of the assistance and also allowing the manual input of the weight of the user, the remote control optionally being attached to the lanyard; and the remote control comprising a stop button configured for deactivation of assistance, when deactivated no assistance is provided, and first and second activation buttons configured for activation of the assistance, the first activation button configured being for selecting an up direction for when wanting assistance on climbing and the second activation button being configured for selecting a down direction for when wanting assistance on descent; the remote control also comprising a display configured for displaying weight values, said displayed weights values being increased or decreased or selected by the up, down and stop buttons; a memory configured for storage of sets of assistance control values for the control of the assistance level(s) of the driving apparatus by the controller, the assistance level(s) for the up direction of movement corresponding to two levels of assistance and for the down direction of movement corresponding to at most two levels; each set of assistance control values being for a given weight and having for an up direction selection two assistance control values, a base assistance control value for the up selection, a nominal assistance control value for the up selection, the base assistance control value giving a lower assistance level than the nominal assistance control value, the lower assistance level being not null, wherein the program of the controller having material elements allowing:
selection among the sets of the one that corresponds to the weight entered in the device with the remote control,activation of the assistance which is only obtained by the activation buttons of the remote control, the activation buttons allowing the start of assistance to a level set to the base assistance control value for the selected direction,deactivation of the assistance which is obtained by either the stop button of the remote control, or by the detection by the sensor of no movements, or by the detection by the sensor of an actual direction of movement opposite to the activation button which was selected, and the program of the controller further allowing for the up selected direction:
following a predetermined time after the level assistance has been set to the up base assistance control value, if the sensor detects a movement in the up selected direction then the level of assistance is set to the up nominal assistance control value, else being the deactivation of the assistance,when the level assistance has been set to the up nominal assistance control value, if the sensor detects no movement or a slow movement then the level of assistance is set to the up base assistance control value. |
