The invention relates to a stair lift comprising a rail which is mounted along the staircase, at least partially at an angle to the horizontal plane, and a frame which is movable along the rail, on which a chair is mounted, which frame is provided with support and drive means that engage the rail, wherein the chair is rotatable about a vertical axis relative to the frame between two extreme rotated positions, wherein the chair comprises a seat on which a person can be seated and wherein the chair comprises a footrest on which a person seated on the seat can rest his or her feet. The invention also relates to a frame for a stair lift which is movable along the rail which is mounted along a staircase at least partially at an angle to the horizontal plane, on which frame a chair is mounted, wherein the frame is provided with support and drive means that can engage the rail, wherein the chair is rotatable about a vertical axis relative to the frame between two extreme rotated positions, wherein the chair comprises a seat on which a person can be seated and wherein the chair comprises a footrest on which a person seated on the seat can rest his or her feet. The invention further relates to a chair for a stair lift, which chair comprises frame mounting means for mounting the chair on a frame, wherein the chair is rotatable about a vertical axis relative to the frame between two extreme rotated positions, wherein the chair comprises a seat on which a person can be seated and wherein the chair comprises a footrest on which a person seated on the seat can rest his or her feet.
Such a stair lift, frame and chair for a stair lift are generally known. The chair of the stair lift can rotate about the vertical axis so as to avoid obstacles, such as narrow passages, and/or so as to enable a person seated on the chair to get on and off comfortably at the ends of the stair lift.
If the footrest is located approximately at the level of the support and drive means, unimpeded rotation of the footrest about the vertical axis might lead to the footrest touching the rail at some location, in particular in a bend, along the rail. The extent of the rotation of the chair is limited by this. It is desirable, however, to be able to rotate the chair as far as possible so as to be better able to avoid obstacles along the staircase, such as narrow passages, or in order to enable the person on the chair to get on and off more comfortably at the ends of the stair lift. The object of the invention is to provide a solution to this problem.
In order to achieve that object, the seat and the footrest are rotatable at mutually different angles about the vertical axis. This makes it possible to have the seat rotate further to an extreme position than the footrest, wherein part of the front side of the seat can extend above the rail in the extreme position. For the person seated on the chair it is generally not a problem to place his or her legs slightly at an angle.
The rotation of the footrest is preferably linked to the rotation of the seat via connecting means, wherein, in at least one extreme rotated position of the seat, the footrest has rotated less far to an extreme rotated position than the seat.
The rotation of the seat and that of the footrest between the two extreme rotated positions of the footrest are preferably linked such that the seat and the footrest rotate at the same angle about the vertical axis, wherein the seat can rotate further to the at least one extreme rotated position of the seat, whereas the footrest remains in the at least one extreme rotated position. In this way the difference in rotation only occurs when it is necessary to rotate the seat to the extreme position. The chair preferably comprises drive means which are designed to rotate the seat and the footrest about the vertical axis, and the drive means preferably comprise unlinking means which unlink the rotation of the footrest in the at least one extreme position of the foot rest from the rotation of the seat when the seat rotates further to the at least one extreme position.
Preferably, the at least one extreme rotated position of the footrest can be adjustably set, so that it can be adapted to the situation at the location where the stair lift is installed.
The invention will now be explained in more detail with reference to an embodiment shown in the figures, in which:
According to
The chair 3 consists substantially of a chair frame 5, a seat 6, a backrest 7, armrests 8 and a footrest 9 in the form of a plate that extends in the horizontal plane.
In
The seat 6, with the backrest 7 and the armrests 8, is mounted to the top end of an upper shaft 10. The footrest 9 is hingedly mounted to the bottom end of a lower shaft 11. Both shafts 10, 11 are rotatably mounted in the chair frame 5, wherein the upper shaft is connected to an electric motor, which causes the seat to rotate. The upper shaft 10 is connected to the lower shaft by means of a connecting mechanism as described below.
With reference to
The ring 14, the hollow tubular upper end of the shaft 11, the cylindrical wall of the driver 13 and the push-out cylinder parts 15 all extend concentrically in a circular bore of a flange 16 that is attached to the chair frame 5.
In the situation shown in
In the situation shown in
According to
The position of the ring 14 around the shafts 10, 11 relative to the outer cylinder 16 is adjustable, so that the disconnecting point, and thus the extreme position of the footrest 9, is adjustable.
Number | Date | Country | Kind |
---|---|---|---|
2008786 | May 2012 | NL | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/NL2013/050348 | 5/8/2013 | WO | 00 |