fig1 to 4 show exemplary embodiments of a floor - treating or floor - cleaning machine which , in terms of basic construction , corresponds to the floor - cleaning machine which is known from international pct application wo 98 / 43527 , which was published before the priority date . the floor - cleaning machine of such a construction has a treating head 3 which can be pivoted about a vertical axis , it further being possible for the cleaning head to be pivoted jointly about the vertical pivoting axis via a running roller 5 which can be pivoted along in unison . the vertical pivoting axis is preferably offset in relation to the vertical diameter through the running roller which can be pivoted along in unison . as far as the construction and functioning of such cleaning machines are concerned , you are referred to the abovementioned prior publication wo 98 / 43527 in full , and this is included in the contents of the present application . insofar as the functioning and construction have been described in this prior publication , it is possible to omit such a description here . in order to configure , for example , a floor - treating machine known from the abovementioned prior publication as an automatic machine , it is possible , then , to provide the corresponding electrics and electronics for moving the floor - treating machine in accordance with a predetermined path or path region . in practice , however , such an automatic floor - treating machine may only be used expediently if it can react independently to obstacles in the cleaning region . this requires such obstacles to be detected first of all . such obstacles may be , for example , in the form of people standing in the cleaning region or in the form of objects which , for example , have been newly placed in position , placed at some other location or displaced , etc . in order always to monitor such obstacles , and / or the boundary of the treating or cleaning surface , automatically and to be able to evaluate the same electronically , the floor - treating machine according to fig1 to 4 comprises a first , bottom sensor device 13 , which may comprise , for example , a laser scanner . the figures show here , on the one hand , the sensor device 13 as well as an associated sensing field 15 , along which the laser beam is moved back and forth permanently and automatically by way of the laser scanner . within these fields it is possible , within a certain spacing , for the actual sensor 13 to detect , by the evaluation of the reflected light , whether obstacles are located in this region . it is just as possible , however , to use a different sensor device , for example a sensor based on a radar unit , an infrared unit , ultrasonic sensors , etc . it is also possible , however , to use a camera in order to analyze a corresponding picked - up optical image , by way of possible electronic evaluation methods which are already known nowadays , and to check for the presence of boundaries or obstacles and , in dependence thereon , to change , or at least influence , the continued travel , the travel in a straight line or the travel on a curved path of the automatic cleaning machine . also provided is a second sensor device 17 , which , in the exemplary embodiment shown , is arranged above the first sensor device 13 . the second sensor device comprises a column - like construction with a multiplicity of sensor devices 23 , for example in the form of ultrasonic sensor devices 23 , formed there and seated , for example , one above the other on the mutually opposite side regions 19 and in the front region 21 . whilst the first sensor device is preferably arranged directly above the floor region , for example level with the running wheels 5 and 7 or , for example , level with the chassis 25 of the processing or floor - treating machine , the so - called second sensor device 17 is preferably arranged above the chassis 25 , that is to say above the floor surface , in the exemplary embodiment shown above the running wheels 7 , and extends there , when the carriage is traveling in a straight line , in the center longitudinal plane of symmetry , the plurality of sensors 13 , arranged on the front and on the mutually opposite sides 19 , being arranged to a more or less pronounced extent vertically one above the other , in the exemplary embodiment shown on a type of sensor column 27 . this sensor column 27 is likewise firmly connected to the treating or cleaning head , in turn , such that it can be pivoted along in unison , in the exemplary embodiment shown it is mounted directly on top of the first sensor device 13 , with the result that , when the carriage is correspondingly traveling on a curved path or with the processing or cleaning head 3 pivoting , the first and second sensor devices are automatically aligned in the direction of cleaning and travel . the overall construction is thus such that , by means of a vertical pivoting axis arranged beneath the chassis 25 , the processing or floor - treating head 3 can be pivoted from left to right , it being the case that , when the carriage is traveling in a straight line , said pivoting head projects beyond the front boundary 29 ( fig2 ) and the abovementioned second sensor device 17 is retained and mounted on said projecting sensor - carrying section 31 . the arrangement including the front housing covering 33 of the floor - treating machine is such that , even with lateral pivoting , said second sensor device 17 , for example in the form of the sensor column 27 , is no longer able to collide with the housing covering 33 . in the case of the plan view according to fig4 , it is possible to see , in the case of the corresponding pivoting movement to the left , the first sensor device 13 pivoting along in unison , with the corresponding alignment of the sensing field 15 , and the second sensor device 17 , formed on the sensor column 27 , jointly pivoting along in unison . since , by virtue of this technical measure , the critical region is always sensed and evaluated , it is possible for the number of individual sensor elements to be drastically reduced in comparison with conventional sensor devices . fig5 corresponds to the lateral illustration according to fig4 . it is further provided in the case of fig5 that the sensor device 13 , 17 acts overall as a tactile sensor element 41 . in other words , if the mobile carriage , for example in the form of the floor - cleaning machine explained , runs into an object which , for example , also projects above the floor in the direction of the machine , it is possible either for the upwardly projecting sensor tree in the form of the second sensor device 17 or else also for the first , bottom sensor device 13 — as a result of the fact that the two units are designed together or separately as tactile sensor devices 41 — to initiate a corresponding signal , upon contact with relevant objects , in order to stop further travel in the forward direction and , if required , to move , for example , some way back again and then to the side , in particular when the carriage is a self - propelling vehicle . alternatively or as a supplement , it is also possible to provide a further sensor device 141 , in particular in the form of a tactile sensor device 141 ′, which , in the exemplary embodiment shown in fig5 , comprises a bar - like contact device 45 which projects in the forward and downward directions and is provided at the bottom with a roller or after a contact section 45 ′ tilted down counter to the direction of travel . if the vehicle explained above , for example in the form of a floor - cleaning machine , moves toward downwardly directed stairs , then this floor - sensor device 141 , in particular in the form of a tactile sensor device 141 , would immediately detect that the floor surface terminates at a step or a drop and would bring the vehicle to a standstill or initiate , if required , a change in direction to the side or to the rear or a correspondingly superposed movement . it is thus possible to prevent the vehicle from tumbling downward , for example , on stairs or ramps .
an improved drivable wagon is embodied as a processing or a cleaning device which is suitable in particular for independent driving by the provision of at least one sensor device . the device can be at least swung in unison with at least one steerable running wheel and / or a swingable floor processing or cleaning unit or head .