the ski binding 1 illustrated in fig1 has a front sole holder 2 and a heel holder 3 which hold a sole 4 of a conventional downhill ski boot or of a touring ski boot on a plate 5 . the release function , the mechanics and adjustability of said front sole holder 2 and of the heel holder 3 are basically known and are therefore not described in more detail here . the plate 5 can be pivoted upward about a front axis 6 , as known per se . in this case , said axis 6 is arranged transversely with respect to the longitudinal direction of the ski below the front sole holder 2 on a bearing part 7 fixed on the ski . in order to achieve said pivotability of the plate 5 , the rear end of the plate 5 has to be freely movable upward in the arrow direction “ t ”, i . e . has to be able to be positioned from a locked position into an unlocked position . in the exemplary embodiment illustrated in fig1 , the ski binding 1 according to the invention therefore has front locking elements 8 and rear locking elements 9 which are arranged below the plate 5 . the locking elements comprise a lever mechanism 10 which is arranged on the ski and has two connectors 11 , 11 ′ which are fixed at their one end on a rotary disk 12 and at their other end on locking pins 13 , 13 ′. the front locking element 8 is preferably arranged below the ball region of the boot sole and the rear locking element 9 is preferably arranged below the heel region in order to permit a good transmission of force to the ski . this arrangement has the further advantage that the locking elements are located within the binding region or the region of the boot sole and not outside it , and therefore there is virtually no negative influence on the natural sag of the ski . recesses 14 , 14 ′, in which the locking pins 13 , 13 ′ engage in order to lock the plate 5 to the ski , are now provided in bearing elements 15 , 15 ′ on the plate 5 . of course , instead of two recesses and locking pins , as illustrated in fig1 , just one recess and in each case one locking pin can also be provided . the locking pin may also have a different shape than shown in the exemplary embodiment . in order to unlock the plate 5 for touring , the rotary disk 12 merely has to be rotated in the direction of rotation “ a ” ( see fig2 ). in the process , the connectors 11 , 11 ′ which are fixed to the rotary disk 12 are rotated at the same time and therefore the locking pins 13 , 13 ′ are synchronously pushed out of the recesses 14 , 14 ′. the locking elements 8 and 9 are then unlocked , and the plate 5 can be pivoted together with the boot in the arrow direction “ t ” for touring . in order to lock the plate 5 again for skiing downhill , the operation has to take place in the opposite sequence to the sequence described previously . in order to be able to easily actuate the rotary disk 12 , the latter has a handle ( not illustrated specifically ) which can protrude laterally from the ski binding . of course , other operating means are also possible without departing from the scope of the present invention . fig3 and 4 illustrate a further exemplary embodiment in which the ski binding 1 likewise has front locking elements 8 and rear locking elements 9 . however , in contrast to the exemplary embodiment described previously , here the entire plate 5 is displaced out of the bearings 15 , 15 ′ fixed on the ski or out of the recesses 16 , 16 ′ thereof in the longitudinal direction of the ski ( see arrow “ b ”). in the process , the locking webs 17 , 17 ′ which are fastened below the plate are displaced out of the locked position , which is illustrated in fig3 , for downhill skiing into the unlocked position which is illustrated in fig4 , for touring skiing such that a pivoting of the plate upward is also possible here . in order to be able to displace the locking webs 17 , 17 ′ and therefore also the plate 5 in the arrow direction “ b ” and vice versa , a lever mechanism ( not illustrated specifically ) is provided which , as in the case of the exemplary embodiment according to fig1 , may be formed from a crank mechanism but also from any other adjusting mechanism . furthermore , it is also possible in this exemplary embodiment to also only provide one locking element , for example in the central region of the plate . it is pointed out that the present invention is not restricted to the embodiment described and illustrated but that modifications apparent to a person skilled in the art are also to be included . with reference to fig5 to 11 , a particularly preferred embodiment is described below , in which use is made very substantially of the construction principles illustrated with reference to fig3 and 4 . two flexible base plates 21 and 22 ( not illustrated in fig5 ) are fastened consecutively in the longitudinal direction of the ski to the ski 20 by means of screws 19 and are designed in such a manner that they do not provide any significant resistance to flexing movements of the skis 20 . guide rails 21 ′ and 22 ′ are integrally formed on said base plates 21 and 22 , said guide rails being , for example , in the form of angled profiles with in each case a vertical leg integrally formed on the associated base plate 21 or 22 and a horizontal leg integrally formed on the upper edge of the vertical leg , with it being possible for said horizontal legs to point outward in directions facing away from each other . the bearing part 7 is guided in a longitudinally displaceable manner on the guide rails of the front base plate 21 in the longitudinal direction of the ski . for this purpose , the bearing part 7 has guide elements 23 which are formed in an essentially complementary manner to the guide rails and which engage around and below the abovementioned horizontal legs of the guide rails such that the bearing plate 7 is secured on the front base plate 21 in a virtually play - free manner by means of a form - fitting connection to the guide rails in the transverse and vertical directions . the bearing part 7 can be displaced by means of a hand lever 24 between a front end position in the longitudinal direction of the ski and a rear end position in the longitudinal direction of the ski when the hand lever is folded over from its one position resting on the top side of the ski into the other position resting on the top side of the ski . the hand lever 24 is mounted pivotably about an axis parallel to the transverse axis of the ski on small bearing blocks arranged fixedly on the front base plate 21 or on the top side of the ski , and forms an assembly in the manner of a toggle lever together with a leaf spring 25 , the one end of which is connected fixedly to the bearing part 7 and the other end of which is coupled to the hand lever 24 by means of a transverse axis 26 . the leaf spring 25 is designed with a certain amount of prestressing in such a manner that the leaf - spring end connected to the hand lever 24 in an articulated manner attempts to tension the hand lever 24 in each case into a position in which it is placed onto the upper side of the ski , with the toggle lever assembly formed from the leaf spring 25 and the hand lever 24 being in a dead - center position or position beyond the dead center when the hand lever 24 is placed in the one or other direction onto the top side of the ski . accordingly , the bearing part 7 , depending in each case on the end position which is taken up by the hand lever 24 and which rests on the top side of the ski , is secured immovably in the front or rear position in the longitudinal direction of the ski . the standing plate 5 is arranged on the bearing part 7 in a manner such that it can pivot about the transverse axis 27 . in this case , the standing plate 5 is secured virtually immovably on the top side of the ski when , with the standing plate 5 placed onto the top side of the ski , the bearing part 7 is displaced out of its rear end position in the longitudinal direction of the ski into the front end position in the longitudinal direction of the ski . during this forward displacement of the standing plate 5 placed onto the upper side of the ski , guide elements 28 which are arranged on the lower side of the standing plate 5 and are formed in a similar manner to the guide elements 23 of the bearing part 7 , interact in a locking manner with the horizontal webs of the guide rails 21 ′ on the front base plate 21 and with identical guide rails 22 ′ on the base plate 22 . if the standing plate 5 is placed onto the top side of the ski in the rear position of the bearing part 7 in the longitudinal direction of the ski , the guide elements 28 arranged in the vicinity of the front end of the standing plate 5 take up a position behind the rear ends , in the longitudinal direction of the ski , of the guide rails 21 ′ of the front base plate 21 while the guide elements 28 , which are arranged further to the rear , of the standing plate 5 each take up a position at corresponding cutouts of the horizontal legs of the guide rails 22 ′ of the rear base plate 22 . if the bearing part 7 is now displaced forward in the longitudinal direction of the ski by the hand lever 24 being folded over from its one position resting on the top side of the ski through approximately 180 . degree . into its other position resting on the top side of the ski , then the guide elements 28 are each displaced into a position in which they engage around and under the horizontal webs of the guide rails 21 ′ and 22 ′ of the base plates 21 and 22 such that the standing plate 5 is secured on the base plates 21 and 22 in a manner such that it is free from play in the transverse and vertical directions , but remains displaceable in the longitudinal direction of the ski . this displaceability in the longitudinal direction of the ski is of importance for flexing movements of the ski . since the standing plate 5 is at a more or less large vertical distance from the neutral bending zone of the ski , during flexing movements of the ski relative displacements inevitably occur in the longitudinal direction of the ski between the standing plate 5 and the base plates 21 and 22 , with , in particular , the relative movements between the rear base plate 22 and the standing plate 5 being relatively large because the region of the rear base plate 22 is at a relatively large distance from the bearing plate 7 which is secured in a virtually immovable manner by the leaf spring 25 and the hand lever 24 resting on the top side of the ski . as soon as the bearing part 7 has been adjusted by means of the hand lever 24 into its rear position in the longitudinal direction of the ski , the standing plate 5 takes up its state , as desirable for touring , in which it can be pivoted upward about the transverse axis 27 relative to the ski 20 , i . e . can be raised from the top side of the ski . after the standing plate 5 is raised from the top side of the ski , a supporting clip 29 can be pivoted from the inoperative position , illustrated in fig6 , into a first or second latchable operative position by pivoting in the clockwise direction through approximately 90 . degree . or 180 . degree . in the clockwise direction . in the first operative position , the heel - side end of the standing plate 5 is supported at a distance , which is predetermined by the length of the long leg 29 ′ of the supporting clip 29 , from the upper side of the rear base plate . this is advantageous in particular if very steep slopes are to be overcome during the touring . in the second operative position , i . e . when the supporting clip 29 has been pivoted from the inoperative position of fig6 through 180 . degree . in the clockwise direction , the heel - side end of the standing plate is supported in relation to the top side of the rear base plate 22 or the top side of the ski at a distance predetermined by the length of the short leg 29 ″ of the supporting clip 29 . this setting is selected if comparatively shallow slopes are to be overcome during touring . since , during touring , i . e . with the standing plate 5 pivoted up relative to the ski 20 , the bearing part 7 takes up its rear position in the longitudinal direction of the ski , it is readily ensured that the center of gravity of the ski 20 is located in the longitudinal direction of the ski in front of the transverse axis 27 , about which the standing plate 5 pivots on the bearing part 7 , and always attempts to drop the ski tip downward when the skier lifts the foot and therefore the respective ski . the abovementioned center of gravity position of the ski is advantageous in particular for kick turns or similar maneuvers . if appropriate , depressions can be arranged on the top side of the rear base plate 22 , into which the supporting clip 29 can be lowered when placed onto the base plate 22 . as a result , the standing plate 5 which is placed onto the base plate 22 by the supporting clip 29 obtains increased stability in the transverse direction of the ski . the front sole holder arrangement 2 is fastened together with the standing plate 5 to the bearing part 7 by the transverse axis 27 , with a securing of the housing of the front sole holder arrangement 2 in a stationary manner relative to the standing plate 5 being ensured by a form - fitting connection between the housing of the sole holder arrangement 2 and the front end of the standing plate 5 . if a ski boot is inserted into the ski binding 1 , the front sole end of the ski boot is secured by the sole holders 30 of the front sole holder arrangement 2 , with the sole holders 30 engaging around or over the front sole end laterally and from above . ski boots for downhill skiing have standard thicknesses , and therefore , by means of corresponding adaptation of the shape of the sole holders 30 , vertical play - free securing can readily be ensured . the conditions for touring ski boots are different . in this case , in comparison to boots for downhill skiing , the sole thicknesses may differ greatly . the front sole holder arrangement 2 is therefore combined with a supporting arrangement 31 which can be adjusted in the vertical direction . said supporting arrangement has a slide 32 which is guided displaceably by means of lateral guide elements 33 on lateral guide webs 34 of the standing plate 5 . the guide webs 34 are arranged obliquely with respect to the plane of the standing plate 5 such that , during longitudinal displacement in the direction of the guide webs 34 relative to the standing plate 5 , the slide 32 is also adjusted in the vertical direction . the position of the slide 32 on the guide webs 34 can be set by means of an adjusting screw 35 , the head of which is mounted axially and radially on the bearing part 7 and the threaded section of which is screwed into a nut 36 which is secured on the slide 32 radially and axially with wobbling mobility . a slide plate 37 which can be displaced in the transverse direction is arranged on the top side of the slide 32 and is tensioned into a central position by means of a helical compression spring 38 . the slide plate 37 is preferably guided on the slide 32 on a curved path , the center of which drops into the heel region of the ski boot . by means of appropriate selection of the materials , it can readily be ensured that the slide plate 37 can be displaced smoothly on the slide 32 . the front end of the ski boot sole is then also supported relative to the front sole holder arrangement 2 with smooth mobility in the transverse direction , as is desirable for a satisfactory release function of the front sole holder arrangement 2 . this smooth displaceability is ensured even if the lower side of the boot sole is to have an anti - slip rubber profile . the heel holder arrangement 3 , which , according to fig5 , is combined with a ski break arrangement , is arranged displaceably in the longitudinal direction on the standing plate 5 . for this purpose , lateral guide webs 39 are arranged on the standing plate 5 and interact in a form - fitting manner with guide elements 40 , i . e . the heel holder arrangement 3 is secured in a play - free manner in the vertical and sideways directions on the guide webs 39 . the securing of the heel holder arrangement 3 in the longitudinal direction of the standing plate 5 takes place by means of an adjusting screw 41 which is mounted rotationally within a housing part of the heel holder arrangement 3 and is tensioned by a thrust spring 42 against a stop 43 fixed on the housing . the adjusting screw 41 has a worm - like external threaded section , the threaded web of which engages in transverse slots of a toothing belt 44 which is arranged nondisplaceably on the top side of the standing plate 5 below the housing of the heel holder arrangement 3 , which housing can be displaced in the guide webs 39 . for this purpose , the toothing belt 44 engages with angled ends in corresponding recesses on the top side of the standing plate 5 . by means of a rotational adjustment of the adjusting screw 41 , the adjusting screw 41 is displaced together with the heel holder arrangement 3 on the toothing belt 44 and therefore in the longitudinal direction of the standing plate 5 . accordingly , the heel holder arrangement 3 can be positioned in a manner matched to the respective length of the ski boot sole . in this case , the heel holder arrangement 3 remains displaceable relative to the adjusting screw 41 counter to the tensioning force of the thrust spring 42 , which is designed as a helical compression spring , such that the ski boot sole can be clamped in a play - free manner in the longitudinal direction of the sole in such a manner that the thrust spring 42 keeps the heel - side sole holder 45 resiliently in contact with the rear sole end in a basically known manner . as can be gathered in particular from fig7 and 8 , firstly , and fig9 and 10 , secondly , the hand lever 24 can be arranged in front of or behind the bearing part 7 in the longitudinal direction of the ski . when it is arranged behind the bearing part 7 , there has to be a corresponding cutout 46 in the standing plate 5 in order to be able to accommodate the hand lever 24 in a pivotably adjustable manner on the top side of the ski or on the top side of the front base plate 21 .
a ski binding for downhill skiing and cross - country skiing has a plate which can be pivoted upwards in the front region about an axis located transversely to the longitudinal direction of the ski . a front ski binding and a rear heel holder for a ski boot or cross - country ski boot are fastened on the plate . at least one catch element which is arranged in front of , or in the region of , the rear sole holder can be used to secure the plate , in its rear region , on the abutment fitted on the ski . in addition , at least one catch element is arranged in the front region of the plate . the plate is fixed on the ski , and reinforced , in the manner of a conventional downhill ski binding by the further catch element in the front region of the ski binding and , in the locked state , is anchored at the front end and at the rear end , and at a number of locations therebetween , on parts of the ski or parts which have been fixed to the ski .