LOCKABLE TRITTHOCKER.

Lockable Tritthocker the invention concerns a Tritthocker, which consists of a climbing thigh, in which in drag axes walk areas is linked, which are together-guided by at least one Führungsstrebe, and a Stützschenkel linked at the climbing thigh, at which at least one walk area is linked.

Such Tritthocker are well-known from German utility models the G 81 21 831,1 and G 81 21 83o.3 of the applicant. In particular in the utility model G 81 21 830.5 specified last such is revealed, gattungsgemer Tritthocker.

The upper supporting cross-beams of the Stützschenkels stand out over the coupling points of the same at the climbing thigh; the ends of these upper supporting cross-beams hold a guidance axle, which lies adjustably in a sliding bearing of the upper walk area. If such Tritthocker is apart-folded, then this guidance axle in the sliding bearing is shifted to a complete stop at the front edge of the upper walk area. Then the upper walk area stands approximately horizontally, also the lower walk area, which is held corresponding position in one parallelogramm- for massively by the guidance props. In the folded up condition however the guidance axle is pushed in the sliding bearing of the upper walk area up to the upper drag axis of the upper walk area zurück-. Consequently the upper walk area between the climbing thigh and the Stützschenkel can down-swivel around the upper drag axis, thus daB parallel to the climbing thigh and the Stützschenkel to lying comes, whereby the Stützschenkel lies for his part likewise parallel to the climbing thigh then. Edsprechend is moved by the guidance props the lower Trittfläche.

Such well-known Tritthocker has however still disadvantages. If one e.g. seizes such well-known Tritthocker in the folded up condition at the climbing thigh, then he tries to fold up automatically. This is on the one hand due to it, R of the Stützschenkel by its dead weight against the climbing thigh to fold it would like whereby then however Zusammenklappbewegung becomes ausgelöst; on the other hand however versuchen - to likewise downward fold gleichzeitig Tritt- surfaces and to press so Eührungsachse in the sliding bearing against the upper drag axis. Completely exceptionally it is further possible that such a well-known footstep in addition, then zusainmenklappt are loaded, if the walk areas only on their auBersten front edges, thus on the edges, which lie far away from the drag axes. Thus namlich on the guidance axle in the sliding bearing a Kraft is expenditure-practiced, how it works also with the raising of the unloaded Tritthockers. Furthermore the sliding bearing is wear susceptible and straight during the operation by children of such Tritthockers with sliding bearing tearing exists the danger that these get jammed fingers in it.

In contrast to this the available invention the task is the basis to create a Tritthocker of the gattungsgemässen kind which in the folded up condition neither automatically with the raising nor during uneven load together folds; in addition sliding bearings are not to be used if possible no more, because of the aforementioned disadvantages.

This task is solved now erfindungsgemäss with a stool of the aforementioned kind by the fact that at least a walk area at this, linked at the Stützschenkel, is swivelling arranged over hinge arms in one Führungsachse; the hinge arms for their part are hinged stored thereby at the ends of the upper Stützholme in one oscillation axle each. Further a handle is according to invention located swivelling on at least one oscillation axle, which exhibits a special angle slotted hole. In this angle angle too the same associated drag axis lies for locking in the folded up position of the walk area. The angle slotted hole is called angle slotted hole, since it has the form of a usual slotted hole, which exhibits an end however to a bent additional slotted hole.

Bending the slotted hole is thereby because of the end of the handle opposite to the guidance axle. In the folded up condition the guidance axle comes in the angle angle of the angle slotted hole to lying and is as it were locked there.

Consequently in this condition the distance is rigidly held between Führungsachse and the oscillation axle in the handle. Since however when folding up the according to invention moves the Tritthockers the oscillation axle inevitably to the guidance axle, folding up of the Tritthockers becomes impossible with locked guidance axle. Thus a safe bolting device is creative, so that the stool folds up neither with the raising at the climbing thigh nor with ungleichmässiger load, in particular on the foremost parts of the walk areas, automatically.

If one wants to fold up the stool however, then one has to only raise the handle somewhat, so that Führungsachse from the angle hole comes into the actual slotted hole. Now the handle in the slotted hole can move according to the movement of the oscillation axle when folding up on the guidance axle freely; thus the oscillation axle can induce itself to the guidance axle.

If one wishes a bolting device also in the folded up condition, one can plan a further angle hole also still at the other end of the slotted hole in the handle, or a similar Verrastung.

It is however with a Tritthocker in accordance with ASS of the invention like also with other Tritthockern zweckmässig to distribute the load as reciprocally as possible. This can be obtained also by the fact that one plans one of the handles according to invention from each side of the Tritthockers. This is not so practical however, since by the user both hands are then needed when serving Hockers for the manipulation of the handles.

Instead it is advisable that the hinge arms exhibit supernatant attack surfaces over the oscillation axles to the upper supporting cross-beams to the attack to the upper supporting cross-beams in the folded up condition of the walk area.

During load then these attack surfaces take up thrust forces, which transfer them to the upper supporting cross-beams. It is thus prevented by these attack surfaces that the hinge arms continue to themselves turn down beyond the upper supporting cross-beams as desired. Thus also the handle is relieved, sodass one for Xlinke a usual, thin, punched sheet metal to use can. Because the handle has only the Punktion to hold the Tritthocker in the folded up condition where only small forces arise.

The nature of the invention is described also still on the basis the designs. Show: Figure 1 a perspective opinion of a from of guidance example erfindungsgemEBen of Tritthockers; Figure 2 a detail opinion of the side in view direction A in accordance with figure 1 for the elucidation of the hinge arms and the handle; Figure 3 a back opinion of the cutout gemäss figure 2, however in line of sight B in accordance with figure 1.

In figure 1 erfindungsgeinässer Tritthocker is represented in the folded up condition. As is the case for the well-known Tritthockern the Tritthocker is formed first by the climbing thigh 1. The climbing thigh 1 exhibits on both sides running climbing cross-beams the 2; these climbing cross-beams 2 are divided by the central axles 6 into the upper climbing cross-beams 2a and the lower climbing cross-beams 2b. The central axles 6 serve 11 for linking the Stützschenkels. The Stützschenkel 11 is for his part likewise formed by the supporting cross-beams. Also the supporting cross-beams are divided again by the central axles 6 into the upper supporting cross-beams 11b and the lower supporting cross-beams 11a. A Tritthocker with two walk areas 4 and 5. is represented.

The upper Trittfläche 4 is linked over the drag axis 13 into Steigholmen 2 of the climbing thigh 1 in well-known way. Accordingly the lower walk area 5 into Steigholinen linked over the lower drag axis 16 is. The upper walk area 4 and the lower walk area 5 werden together-guided of Fuhrungsstreben 15 with the upper walk area 4. As is the case for the state of the art these are linked Führungsstreben 15 at the walk areas in the range of the front edge of the walk areas in each case. Likewise as with the state of the art the walk areas exhibit umgebördelte edges thus downward, umgebördelte sections.

Like that the flanged rim of the upper walk area is marked and by 5the flanged rim of the lower walk area by 4a. Such walk areas are usually made of a sheet metal, whose edge can be umgebördelt easily downward.

This edge serves then with appropriate drillings for linking and/or camps of the axles and Fuhrungs- strives. The lower walk area 5 is stored by the lower drag axis 16 likewise in the climbing cross-beams, like the upper walk area 4 in the upper drag axis 13. Now however the upper supporting cross-beam 11b is not rigidly accomplished in contrast to the state of the art; instead it is prematurely abgekröpft and touched down on it a separate hinge arm 8. This hinge arm 8 exhibits into u-shaped profile, in whose recess the upper supporting cross-beam fits lib. The upper supporting cross-beam lib stores this hinge arm 8 at its end in the oscillation axle 3. around this oscillation axle 3 can thus the hinge arm 8 to the lower walk area 5 turn. At the end of the hinge arm 8 more removed from the upper supporting cross-beam lib is stored the guidance axle 7 for the upper walk area 4. As storage here, as with the remaining parts of the Tritthockers, usually also from cost reasons usual drillings come in question. The guidance axle 7 is stored thereby in the flanged rim 4a of the upper walk area. Of course it is not absolutely necessary that this guidance axle is constant 7; also short guidance achsenstücke into the flanged rim 4a of the upper walk area on the two sides of the hinge arms 8th equivalent is sufficient is valid in all other respects fur the drag axes. On an oscillation axle a 3 is now one erfindungsgeinässe handle 9 arranged.

It is here in the drawn figure however to a large extent covered of the upper walk area 4. Nevertheless the angle slotted hole 14 is to be recognized clearly, in whose angle angle 17 in the folded up condition the upper drag axis 13 engaged. The handle 9 is stored on the oscillation axle 3 and exhibits at the free end a handle nose lo, at which it can be easily operated. As represented the angle hole 17 is to an end of the angle slotted hole, which lies far away from the central axle 6.

In figure 2 now the function of the hinge arm 8 and the handle 9 is to be recognized particularly clearly from line of sight A from the side in cutout. Shown the Tritthocker is here in only incompletely folded up condition. Therefore the upper drag axis 13 came not yet up to the angle hole 17 of the angle slotted hole 14 in the handle 9 and from there also yet did not engage there. Accordingly the attack surface 18 on the end of the hinge arm 8 this upper supporting cross-beam lib neighbouring to the upper supporting cross-beam lib does not rest upon. One these Tritthockers illustrated as, completely to fold up, so ergäbe such the following movements: The supporting cross-beam lib moves away toward the lower climbing cross-beam 2b, thus from the upper climbing cross-beam 2a. This movement the oscillation axle 3 follows and concomitantly inevitably the handle 9. consequently the attack surface 18 to a complete stop on the upper supporting cross-beam lib is brought; accordingly Klinke 9 with its angle slotted hole 14 up to the end is moved, so that the upper drag axis 13 comes into the range of the angle hole 17. By the own force of gravity then the handle 9 with its angle hole 17 falls on and/or over the upper drag axis 13. With this movement however Fuhrungsstrebe 15 as well as Füürungsachse 7 with to their neighbouring part of the hinge arm 8 by the lower climbing cross-beam 2b away to the upper climbing cross-beam 2a are induced. Thus the upper walk area 4 follows a lagging likewise from the lower climbing cross-beam 2b away. By this movement the not placed behind lower walk area over Fuhrungsstrebe 15 along into an appropriate position.

In figure 3 the back opinion, thus from the line of sight B in figure 1, is finally the cutout represented in accordance with figure 2 for elucidation.

The Tritthocker is represented in its completely folded up condition. Demgemäss lies the upper walk area 4 escape-ends to the climbing thigh and the Stützschenkel and/or the appropriate cross-beams. Clear is to be recognized here, how the handle 9 at the oscillation axle 3 is linked and lies over the upper Schwenkachse 13; is not represented with this perspective verstandlich the angle slotted hole 14. Only the handle nose 11 is to be still differentiated. The oscillation axle 3 depresses the moreover one the hinge arm 8 and the end of the upper supporting cross-beam leib.

Lies one behind the other coincidentally Führungs- axle 7, which passes through also the hinge arm 8 and stores this; not however Suhrungsachse 7, although it could look in such a way, 11a depresses the lower supporting cross-beam. Rather here does the lower supporting cross-beam become ? depress la of the central axle 6. This central axle 6 is beabstandet between the lower supporting cross-beam 11a and the lower climbing cross-beam 2b by a usual spacer 19 on this central axle 6. The umgebördelte edge 4a of the upper walk area 4 is represented in this figure only as usual line. This flanged rim 4a is perforated for the storage of the upper drag axis 13 and the guidance axle 7 in each case. Accordingly at least the inside of the upper climbing cross-beam 2a is perforated for the admission and linking of the upper drag axis 13; appropriate is valid regarding the central axle 6. also F5hrungs- strives for 15 is linked in ansich well-known way in the flanged rim 4a in a suitable drilling, as in figure clearly is to be recognized 3.

Legend 1 climbing thigh 2a upper climbing cross-beam 2b lower climbing cross-beam 3 oscillation axle 4 upper walk area 4a flanged rim of the upper walk area 5 lower walk area 5a flanged rim of the anteren walk area 6 central axle 7 guidance axle 8 hinge arm 9 handle 1o handle nose 11 Stützschenkel 11a lower supporting cross-beam 11b upper supporting cross-beam 13 upper drag axis 14 angle slotted hole 15 Führungssbrebe 16 lower drag axis 17 angle hole 18 attack surface 19 spacer