EP3231979A1 - Lift, in particular ladder lift, for the vertical transport of loads and arrangement comprising a ladder and such a lift - Google Patents

Abstract

The invention relates to a lift (3), in particular ladder lift, for the vertical transport of loads, with a carriage (13) having a load, a rolling and / or sliding device and a drive unit (15) for moving the load along a Distance (16), according to the invention, the drive unit (15) in the carriage (13) is integrated and the rolling and / or sliding means comprises means by which the rolling and / or sliding device (14) from an open to a locked Position and vice versa is feasible. The invention also relates to an arrangement (1) with a ladder (2), in particular rung ladder, and a lift (3) movable along the ladder (2). The lift can also be used in winch mode without a ladder.

Description

The invention relates to a lift, in particular ladder lift, for the vertical transport of loads according to the preamble of patent claim 1 and to an arrangement with a ladder and a lift according to claim 8.

Such a ladder lift is known from practice. In this ladder lift, the carriage picks up the load immediately and can be moved along the ladder via its rolling and / or sliding device. For this purpose, the carriage is connected at its front edge with a rope which is deflected at the upper end of the ladder on a deflection roller and is connected back to the ground with a drive unit arranged there. The drive unit is a separate unit from the carriage and separately attached to the floor or at the foot of the ladder. Such ladder lifts have been proven in practice for years; However, their construction is associated with an increased expenditure of time.

The invention has for its object to provide a lift, in particular ladder lift, of the type mentioned above, which is easier to handle, especially faster buildable and versatile. The invention is also based on the object to provide an arrangement with a ladder and a more manageable lift.

This object is achieved in a lift, in particular ladder lift of the type mentioned by the features specified in the characterizing part of claim 1. This object is achieved in an arrangement with a ladder and a lift with the features of claim 8.

Advantageous developments are the subject of the respective dependent claims.

The elevator according to the invention, in particular ladder lift, for the height transport of loads accordingly has a load-receiving, a rolling and / or sliding device having carriage and a drive unit for moving the load, in particular of the carriage, along a path. The lift, in particular ladder lift, is further constructed so that the drive unit is integrated in the carriage and the rolling and / or sliding means comprises means by means of which the rolling and / or sliding device can be transferred from an open to a locked position and vice versa is. The invention is therefore based on the idea to provide a lift, in particular ladder lift, in which the drive unit is not formed as a separate unit, but is integrated in the carriage. In this respect, a separate fastening of the drive unit at the bottom or at the foot of the ladder can be omitted when building the lift. In this respect, a deflection of the support means, such as the rope, at the upper end of the ladder and a return of the same to the carriage or the drive unit omitted. Thus, the lift of the invention is simpler and much faster to build. The lift itself is therefore a compact unit without the previous split in wind unit, which is fixed to the foot of the ladder, and slide, which is movable on the ladder. The winch unit so to speak with the carriage. This makes it possible to use the entire lift, for example hanging on a ceiling or lying horizontally as a load winch. The lift according to the invention is thus extremely versatile. With the help of the rolling and / or sliding device, which can be transferred from an open to a locked position and vice versa, the carriage can be placed at any point of the ladder or separated from the ladder and removed. As a result, a total of a quick assembly and disassembly of the lift is guaranteed. In the known from the prior art ladder lifts the movable carriage, however, is at the top or Insert at the lower end of the ladder or ladder parts. In addition, the lift according to the invention can be used with and without ladder.

According to one embodiment of the invention, the rolling and / or sliding device in the longitudinal direction of the carriage extending skids on; Furthermore, the means are designed to act on at least one of these skids. Such skids have proven themselves in practice. On the other hand, the means for adjusting the rolling and / or sliding device from the open to the locked position and vice versa according to this development can be formed only on one or both skids acting. Just an adjustment only a skid allows a simplified design and can help with the fast on a ladder or attach and attach.

According to one embodiment, two parallel juxtaposed skids are provided and the means are arranged and designed such that both skids are in the transverse direction of the carriage to each other in the open position and away from each other in the locked position and vice versa. This development has the advantage that the carriage with two runners can be placed on the ladder at the same time and the skids can be designed so that the upper part of the skids sit on the ladder profile and therefore the lift as a whole can not sag through the ladder.

According to another embodiment, two parallel juxtaposed skids are provided and the means arranged and designed such that only one of the skids from the open to the locked position and vice versa is pivotally. As already indicated above, this development allows a simple construction and a quick handling of the lift to be used on the ladder or the lift to be taken from the ladder. In particular, this training helps to simplify the handling of the lift.

According to yet another development, the carriage for moving the load along the path of a belt drum connected to the drive unit for winding or unwinding of a support means preferably in the form of a webbing on. Such a webbing can be wound up or unwound on a track, whereby the disadvantages occurring during the winding of wire ropes, such as jumps, overlays and resulting cable damage, can be avoided. It is so far no grooved drum required, as was necessary when winding wire ropes.

According to another embodiment, the carriage has a preferably connected to the drive unit safety device in the direction of travel and counter to the direction facing limit switch strips and / or means for monitoring a taut suspension, preferably webbing, when actuated, the method of the load along the path stopped or at least partially prevented. By means of these safety devices, the lift according to the invention is particularly easy to handle, since a method of the load or the carriage when an obstacle in the direction of travel or when tearing the support means, such as the webbing is automatically at least partially interrupted. As a result, the lift according to the invention fulfills the highest safety requirements.

According to yet another development, the drive unit has a preferably battery operated electric motor. In this development, therefore, the handling of the lift according to the invention is further simplified, since the lift can be operated at its place of use regardless of the presence of a power grid. Thus, the lift according to the invention is particularly versatile also be used where in the immediate vicinity no power grid for moving the lift is available.

According to a particularly preferred embodiment of the invention, an arrangement with a ladder, in particular rung ladder, and a movable along the ladder lift is provided with the structure described above. Such an arrangement is therefore particularly easy to handle and versatile, since the ladder a so-called. Block ladder, in which parts of the ladder are placed in reverse V-shaped, a laying ladder, in which the lower end of the ladder rests on a floor and the upper End is created or leaned against a building, for example, or can be extension ladder. The ladder serves in a sense as a rail for the lift and can be particularly advantageous a step ladder, including a rung ladder, be. In this respect, it is clear that the ladder can be used independently of the lift, even for common conductor purposes. In the sense of a double effect, the ladder thus serves for one common conductor purposes, on the other hand as a rail for moving the lift.

According to another embodiment of the arrangement, the carriage is in the open position of its rolling and / or sliding device on the ladder used and securely supported in the locked position of its rolling and / or sliding along the ladder movable. In this respect, it is possible to attach the carriage with a few simple steps on the ladder and to mount and also with a few simple steps, a removal of the lift from the ladder, so disassemble perform. Such an arrangement is thus easier to handle.

Advantageously, the free end of the support means, preferably the webbing, attached to a holder, with the ladder, preferably with one or more rungs thereof, connectable. Such a connection can be, for example, a suspension of the holder on the conductor, whereby the handling of the arrangement according to the invention is further simplified. An arrangement according to the invention is therefore to build or dismantle in a much shorter time than was previously possible in arrangements according to the prior art. The handling is also simplified in that the arrangement according to the invention can be used mobile.

• Fig. 1 eine schematische, perspektivische Ansicht einer Anordnung mit einer Leiter und einem entlang der Leiter verfahrbaren Lift;
• Fig. 2 eine schematische Darstellung der Anordnung gemäß Fig. 1 in einer Vorderansicht;
• Fig. 3 eine schematische Vorderansicht eines Liftes im Windenbetrieb;
• Fig. 4 eine schematische Seitenansicht der Anordnung gemäß den Fig. 1 und 2 in vereinfachter Darstellung mit Gleitkufen in einer verriegelten Stellung;
• Fig. 5 eine schematische Seitenansicht der Anordnung gemäß Fig. 4 mit Gleitkufen in der geöffneten Stellung;
• Fig. 6 eine schematische Darstellung gemäß Fig. 5 beim Einsetzen des Liftes in die Leiter;
• Fig. 7 eine schematische, teilweise Unteransicht des Liftes gemäß einer ersten Ausführungsform mit den Gleitkufen in der verriegelten Stellung;
• Fig. 8 eine schematische, teilweise Unteransicht des Liftes gemäß Fig. 7 mit den Gleitkufen in der geöffneten Stellung;
• Fig. 9 eine schematische, teilweise Seitenansicht der Anordnung gemäß einer zweiten Ausführungsform mit einer der Gleitkufen, welche in die geöffnete Stellung verschwenkt ist;
• Fig. 10 eine Darstellung gemäß Fig. 9 mit der Gleitkufe in der verriegelten Stellung;
• Fig. 11 eine schematische, vereinfachte Darstellung der schwenkbaren Gleitkufe mit ihrem Verriegelungsmechanismus;
• Fig. 12 eine schematische, vereinfachte Seitenansicht einer Einrichtung zum Überwachen eines straffen Tragmittels in ihrer Betriebsstellung;
• Fig. 13 eine schematische, vereinfachte Seitenansicht der Einrichtung zum Überwachen eines straffen Tragmittels gemäß Fig. 12 in ihrer Bremsstellung;
• Fig. 14 eine verkleinerte Darstellung der Anordnung gemäß Fig. 2 mit Endschalterleisten in der normalen Betriebsstellung;
• Fig. 15 eine schematische Darstellung des Liftes gemäß Fig. 14 mit der oberen Endschalterleiste in der ersten Auslösestufe;
• Fig. 16 eine schematische Darstellung des Liftes gemäß Fig. 14 mit der oberen Endschalterleiste in der zweiten Auslösestufe;
• Fig. 17 eine schematische Darstellung des Liftes gemäß Fig. 14 mit der unteren Endschalterleiste in der Auslösestufe;
• Fig. 18 eine schematische Darstellung des Liftes im Windenbetrieb mit den beiden Endschalterleisten im Normalbetrieb;
• Fig. 19 eine schematische Darstellung gemäß Fig. 18 mit der lastnahen Endschalterleiste in der ersten Auslösestellung;
• Fig. 20 eine schematische Darstellung gemäß Fig. 18 mit der lastnahen Endschalterleiste in der zweiten Auslösestellung;
• Fig. 21 eine schematische, teilweise Vorderansicht der Schaltung der oberen Endschalterleiste gemäß einer ersten Ausführungsform;
• Fig. 22 eine schematische, vereinfachte Darstellung der Endschalterleisten gemäß einer zweiten Ausführungsform;
• Fig. 23 eine schematische, teilweise Seitenansicht einer an einer Leiter befestigten Halterung mit einer damit verbundenen Aufnahme für das freie Ende eines Tragmittels des Liftes;
• Fig. 24 eine schematische, perspektivische Darstellung einer Aufnahme gemäß Fig. 23; und
• Fig. 25 eine schematische Seitenansicht der Aufnahme in vergrößerter Darstellung.

Embodiments of the subject invention are described below with reference to the drawing, all described and / or illustrated features alone or in any combination form the subject matter of the present invention, regardless of their combination in the claims or their dependency. Show it:

• Fig. 1 a schematic, perspective view of an arrangement with a conductor and a movable along the ladder lift;
• Fig. 2 a schematic representation of the arrangement according to Fig. 1 in a front view;
• Fig. 3 a schematic front view of a lift in winching operation;
• Fig. 4 a schematic side view of the arrangement according to the Fig. 1 and 2 in a simplified representation with skids in a locked position;
• Fig. 5 a schematic side view of the arrangement according to Fig. 4 with skids in the open position;
• Fig. 6 a schematic representation according to Fig. 5 when inserting the lift in the ladder;
• Fig. 7 a schematic, partial bottom view of the lift according to a first embodiment with the skids in the locked position;
• Fig. 8 a schematic, partial bottom view of the lift according to Fig. 7 with the skids in the open position;
• Fig. 9 a schematic, partial side view of the arrangement according to a second embodiment with one of the skids, which is pivoted to the open position;
• Fig. 10 a representation according to Fig. 9 with the skid in the locked position;
• Fig. 11 a schematic, simplified representation of the pivoting skid with its locking mechanism;
• Fig. 12 a schematic, simplified side view of a device for monitoring a tight suspension means in its operating position;
• Fig. 13 a schematic simplified side view of the device for monitoring a tight suspension means according to Fig. 12 in its braking position;
• Fig. 14 a reduced view of the arrangement according to Fig. 2 with limit switch strips in the normal operating position;
• Fig. 15 a schematic representation of the lift according to Fig. 14 with the upper limit switch bar in the first trip stage;
• Fig. 16 a schematic representation of the lift according to Fig. 14 with the upper limit switch bar in the second trip stage;
• Fig. 17 a schematic representation of the lift according to Fig. 14 with the lower limit switch strip in the trip stage;
• Fig. 18 a schematic representation of the lift in winch operation with the two limit switch strips in normal operation;
• Fig. 19 a schematic representation according to Fig. 18 with the load-near limit switch strip in the first release position;
• Fig. 20 a schematic representation according to Fig. 18 with the load-close limit switch strip in the second release position;
• Fig. 21 a schematic, partial front view of the circuit of the upper limit switch strip according to a first embodiment;
• Fig. 22 a schematic, simplified representation of the limit switch strips according to a second embodiment;
• Fig. 23 a schematic, partial side view of a holder attached to a ladder with an associated receptacle for the free end of a support means of the lift;
• Fig. 24 a schematic, perspective view of a recording according to Fig. 23 ; and
• Fig. 25 a schematic side view of the recording in an enlarged view.

In Fig. 1 is an arrangement 1 with a ladder 2, which is shown here as rung ladder, and a movable along the ladder 2 lift 3 shown schematically. In the in Fig. 1 In the embodiment shown, the lift is a so-called ladder lift. In the Fig. 1 shown ladder 2 is provided as a laying ladder with a first, bottom-near part 4 and a second, upper part 5, which is connected by hinges 6 to the lower part 4 near the bottom and, for example, to a building (not shown) can be leaned.

A schematic front view of the arrangement according to Fig. 1 is in a simplified representation in Fig. 2 shown. Here, as already mentioned, the lift 3 is designed as a so-called ladder lift. The lift 3 is in the direction of the double arrow A along the ladder, ie up and down, movable.

Fig. 3 shows a schematic, simplified representation of the lift 3 in the so-called. Winding operation. According to this embodiment, the lift 3 is with its in Fig. 2 lower end 7 suspended by means of a load-receiving points 8 of the lift attacking bracket 10 to a ceiling 11. It is also possible according to an embodiment, not shown, in Fig. 3 shown vertical arrangement to arrange horizontally and insofar as in accordance with Fig. 2 lower end 7 to connect via the bracket 10, for example, with a side wall of a room. In the in Fig. 3 shown embodiment, a load 12 in the vertical direction in the direction of the double arrow B is movable; in the case of a horizontal arrangement, the load 12 would be pulled towards the lift 3, for example, in the direction of the arrow C.

As already mentioned above, the lift 3 is in particular but not exclusively designed as a ladder lift and serves in particular for the transport of high loads. If lift 3 is a ladder lift, the load is on the lift.

The lift 3 has a load-receiving carriage 13, which has a rolling and / or sliding device 14. In Fig. 1 is shown on the lift only a load-carrying means 87, with the help of a in Fig. 1 not shown in detail in the direction of the double arrow A along the ladder 2 is movable.

The lift 3 further has a drive unit 15 (see Fig. 1 to 3 and 6 ) for moving the load 12 along a path 16. In the Fig. 1 and 3 the route is only indicated schematically. As in the Fig. 1 to 3 merely indicated, the drive unit 15 is integrated in the carriage 13.

The rolling and / or sliding device 14 of the carriage 13 is schematically in a first embodiment in the Fig. 4 to 8 and in a second embodiment, schematically in FIGS Fig. 9 to 11 shown.

The rolling and / or sliding device 14 has means 17, by means of which the rolling and / or sliding device 14 from an open position (see Fig. 5, 6 . 8th and 9 ) in a locked position (see Fig. 4 . 7 . 10 and 11 ) and vice versa. These means 17 will be described below with reference to FIGS Fig. 7 to 11 explained in more detail.

It is clear that the carriage can be placed in the open position of its rolling and / or sliding device 14 to the ladder and removed from this, while the carriage in the locked position of its rolling and / or sliding device supported on the ladder and moved , but can not be dismantled or removed from it.

According to the Fig. 4 to 11 has the rolling and / or sliding device 14 in the longitudinal direction 20 of the carriage 13 extending skids 21, 22. These are in the 4 to 6 and FIGS. 9 to 11 in a front view, as shown in FIG FIGS. 7 and 8 shown in a bottom view.

The means 17 for transferring the rolling and / or sliding device 14 or the skids from an open to a locked position and vice versa are formed on at least one of these skids 21, 22 acting.

According to the Fig. 4 to 8 According to one embodiment, two parallel arranged skids 21, 22 are provided. The means 17 are arranged and formed in this (first) embodiment such that both skids 21, 22 in the transverse direction 23 of the carriage 13 to each other in the open position in the direction of the arrows D (see Fig. 8 ) and away from each other in the direction of the arrows E (see Fig. 7 ) are displaceable in the locked position and vice versa.

For this purpose, the carriage 13 according to the FIGS. 7 and 8 a locking mechanism 24 which acts via a linkage 25 on the skids 21, 22 and by means of a rotatable about a vertical axis 26 locking lever 27 from the in Fig. 7 shown locked position in the in Fig. 8 shown, open position and vice versa is feasible. For transferring the skids from the locked position to the open position of the pivot lever 27 according to Fig. 7 to turn in the direction of the arrow F; conversely, the locking lever 27 in the open position according to Fig. 8 in the direction of the arrow G to operate the locking mechanism so that the skids from the open position (see Fig. 8 ) in the locked position (see Fig. 7 ) are transferred. By the rotational movement of the locking lever 27 in the direction of arrow G, the locking mechanism from the position according to Fig. 8 shifted upward in the direction of the arrow H, whereby the linkage 25 pushes the skids 21, 22 in the direction of the arrows E away from each other in the locked position to the outside. Conversely, a rotation of the locking lever 27 in the direction of the arrow F in Fig. 7 a sliding movement of the locking mechanism 24 in Fig. 8 down in the direction of arrow I, whereby the linkage 25, the skids 21, 22 towards each other in the direction of the arrows D shifts. In this position, the carriage 13 according to Fig. 6 first placed on the ladder or the conductor profile with the skid 21 and then pivoted with the other skid 22 in the direction of the arrow R to the ladder or the conductor profile and placed thereon. A release of the carriage from the conductor or the conductor profile takes place in the opposite direction.

A second embodiment of the locking mechanism 24 formed as means 17 is in the Fig. 9 to 11 shown.

According to this embodiment, in turn two parallel juxtaposed skids 21, 22 are provided, wherein the means 17 are arranged and formed in this embodiment such that only one of the skids, in the embodiment shown is the right skid 22, from the open in the locked position and vice versa is pivotable. The other skid 21 is fixed and so far not movable. In this embodiment, the locking mechanism 24 is formed in the form of a snap closure. For this purpose, the skate 22 is provided at its upper end with a locking hook 30, the right edge 31, as in Fig. 11 shown, slanting. Further, a locking pin 32 is provided, which by means of a compression spring 33 in Fig. 11 is loaded to the left in the locking position with the locking hook 30 back. The locking pin 32 is slidably held in a guide 34.

This in Fig. 11 The left end of the locking pin 32 is designed to be tapered in the shape of a tine, wherein the outer edge 35 of the left end extends approximately parallel to the edge 31 of the locking hook 30.

This in Fig. 11 right end of the locking pin receives the end of a handle 36 which against the pressure of the compression spring 33 in Fig. 11 is pulled out to the right in the direction of the arrow K. In the pulled-out position of the handle 36, the locking pin 32 releases the locking hook 30 of the skate 22, so that this example, due to gravity in the direction of the arrow L (see Fig. 9 ) can pivot. In the pulled out in the direction of the arrow K position of the handle 36 of this can be rotated by 90 ° and locked in the rotated position (not shown).

In the pivoted position of the skid 22, which corresponds to the open position and in Fig. 9 is shown, the carriage 13 can be inserted into the conductor 2, in which first the skid 21 placed on the ladder and then the carriage in the direction of arrow M in Fig. 9 is pivoted down to the ladder. In this case, the handle 36 is released either automatically by the locking hook 30 or manually from its locking, so that the compression spring 33, the locking pin in the direction of the locking hook in such Fig. 11 to loaded on the left so that the edge 31 of the locking hook 30 comes to lie above the Verrieglungszapfens 32. A pivoting of the skid from its open position (see Fig. 9 ) into its locked, closed position (see Figure 10 ) can thus be done automatically by the carriage is pressed firmly in the region of his skid 22 on the ladder until the locking hook 30 and locking pin 32 are in the latched position. In this position, the skid 22 is locked in the locked position. In the in Fig. 10 shown locked position, the handle 36 is loaded in the direction of the arrow N to the left and thus locks the skid 22 in their in Fig. 10 shown locked position. A release of the carriage from the conductor or the conductor profile takes place in the reverse direction.

The 4 to 6 9 to 11 illustrate that each skid 21, 22 is approximately U-shaped with a longer, upper leg 40 for laying and sliding along the profile of the ladder 2 and a shorter, lower leg 41 which surrounds the ladder profile and so on Including the conductor profile and ensures safe support of the carriage on the conductor profile. By means of the shorter, lower leg 41, the slide can be easily attached to the ladder. The legs of the skids 21, 22 are dimensioned so that the carriage 40 due to the longer formed upper leg 40 rests securely on the ladder in all operating positions, so that a falling through the skids and thus the carriage is effectively prevented by the ladder.

According to a preferred embodiment of the invention, the carriage 13 for moving the load along the path 16 has a belt drum 42 connected to the drive unit 15 for winding or unwinding a suspension element preferably in the form of a webbing 43 (see also FIG Fig. 1 and 3 ). In the FIGS. 12 and 13 is a schematic, simplified longitudinal section through a portion of the carriage 13 with the belt drum 42 and wound thereon or abzuzuspulenden from this webbing 43 shows. In normal operation, the webbing 43 is tensioned in the direction of the arrow O.

According to another preferred embodiment of the invention, the carriage 13 has a safety device preferably connected to the drive unit 15 44 to 46. The safety device 44 and 45 has in the direction of travel and counter to the direction of travel of the carriage 13 and the load 12 facing limit switch strips 50, 51. These limit switch strips and their operation are in detail in the FIGS. 14 to 22 shown. The additional safety device 46 comprises a device 52 for monitoring a tight suspension means, preferably the webbing 43. Such a device is in its normal operating position in Fig. 12 and in its release position schematically simplified in Fig. 13 shown.

Upon actuation of one of the safety devices 44 to 46, the process of the load along the path 16 is stopped or at least partially prevented, as will be explained in more detail below.

The device 52 for monitoring a tight webbing 43 may also be called a belt breakage brake. With reference to the FIGS. 12 and 13 the device 52 has an L-shaped belt guide 53, through which the webbing 53 is guided. The belt guide 53 is in their in Fig. 12 shown normal operating position by means of rollers 54, 55 above or below the webbing 43 at.

The belt guide 53 is pivotable about a horizontal axis 56 and by a torsion spring not shown in detail or a compression spring 57 in their in Fig. 13 illustrated brake position applied. For this purpose, the belt guide 53 via at least one linkage 60, which engages an end on a pressure spring 57 facing leg 61 of the belt guide 53, connected to at least one brake cam 62 other end, wherein the at least one brake cam 62 acts as an eccentric, which is at floppy or torn webbing 43 immediately presses against the profile of the ladder 2 and brings the lift directly to a halt. The higher the load, the faster a standstill of the carriage 13 of the lift 3 is achieved. When torn webbing 43, the rollers 54, 55 are no longer on the webbing, and the belt guide 53 pivots about the horizontal axis 56 in the direction of arrow P by the force of the compression spring 57 from its in Fig. 12 shown normal operating position in their in Fig. 13 indicated braking position. When pivoting the belt guide 53 pushes the rod 60 the brake cam from his in Fig. 12 shown, a method of sledding enabling Release position in a process preventing engagement position with the profile of the ladder, so that the carriage is stopped immediately. As long as the webbing 43 is not taut, the safety device 46 acting as a brake is active with its device 52, and the lift can not be moved along its travel 16 with its carriage.

According to an embodiment not shown in detail of the invention, the position of the belt guide can also be queried by a force-actuated limit switch. For example, when the limit switch is actuated, the carriage can only move freely upwards, since the slack rope circuit described above can also act as an off-end switch. On the other hand, when the carriage is stopped, this safety device immediately stops the carriage moving on. A ride down is then not possible. Even with a failure of the torsion spring not shown in detail, the belt guide would still be acted upon by gravity in its braking position, so that even in this situation a stop of the carriage is guaranteed, the webbing should no longer be streamlined. In this state, the belt guide 53, as mentioned above, rotates about the axis 56 from its operating position to its braking position in the direction of the arrow P, as shown in FIG Fig. 13 is illustrated.

The safety devices 44, 45 with their limit switch strips 50, 51 are more precisely in the FIGS. 14 to 22 shown. At the upper end of the carriage is the limit switch bar 50, at the bottom of the limit switch bar 51. At a low force of about 100 N, the drive of the carriage is stopped in the respective direction of travel.

The upper limit switch bar 50 has two switching points, as in the FIGS. 15 and 16 is illustrated, the lower limit switch bar 51 a switching point, as shown in Fig. 17 is indicated.

At the first switching point of the upper limit switch bar 50, the safety device 44 triggers an operating limit switch not shown in detail. Continuing up is no longer possible, a ride down in the direction of the arrow Q in Fig. 15 is possible at any time. If the first switching point is exceeded and the second, in Fig. 16 indicated switching point of the upper Limit switch bar 50 is reached, the on-end emergency stop is actuated, and the carriage is in the safe state in which another method is neither up nor down possible. This is indicated by the crossed-out arrow A in FIG Fig. 16 symbolizes.

On the other hand, the lower limit switch bar 51 with its switching point immediately triggers the emergency stop, since a normal sitting on an obstacle by the aforementioned safety device 46 is detected with its device 52 for monitoring a tight webbing. For example, even if the sled would sit unladen on an obstacle down the belt would be slack and the belt guide would rotate to its braking position. As a result, the above-described slack rope switch is actuated, which acts as an Ab-Betriebsendschalter.

Thus, the same high safety standard is guaranteed for both uphill and downhill.

It is also possible to equip the lower limit switch bar 51 also with two switching points.

In winching according to the Fig. 18 to 20 is the lift 3 with its carriage 13 with its lower end 7 to the top of the bracket 10 attached to the ceiling 11, as shown schematically in FIG Fig. 3 and for better illustration again in Fig. 18 is shown. In this respect, the limit switch bar 51 is now at the top, while the limit switch bar 50 extends downwards. In this position, the near-ceiling limit switch bar 51 has no function. In load winch operation, the carriage thus hangs upside down on the ceiling 11 and the limit switch bar 50 hangs down as a result. The webbing 43 is in turn passed through an opening not shown in detail by the limit switch 50, so that it always bears against the limit switch strip when pulling up the loads 12. The switching points of the limit switch bar 50 are identical in this operation with those of a normal driving operation, as previously with reference to the FIGS. 14 to 17 was explained. A transfer of the limit switch strip 50 in the direction of its first switching point prevents according Fig. 19 further pulling up the load 12, but allows a lowering of the load in the direction of the arrow Q. A triggering of the second switching point according to Fig. 20 prevents any further movement of the load and leads directly to the emergency stop position. A further journey is then no longer possible in the direction of the double arrow A, as in Fig. 20 is symbolized.

In Fig. 21 is a first embodiment of the upper limit switch 50, in Fig. 22 a second embodiment of limit switch 50 and limit switch 51 shown schematically.

In the first, in Fig. 21 illustrated embodiment, the limit switch bar 50 is acted upon by the two compression springs 63 to the outside. Stops 64 hold the limit switch bar 50 securely in its outer, in Fig. 21 shown position. As an abutment to the compression springs 63 are the bearings 65, which position the limit switch 50 in the transverse direction. The stops 64 are according to Fig. 21 placed just below the bearings 65. Further, bearings 66 are provided which allow a guide of the limit switch bar 50 in the longitudinal direction. In Fig. 21 two limit switches 70, 71 are located below the bearings 66. When the limit switches 70 are triggered, the first switching point is reached, as has been described above. A drive up is no longer possible, however, a drive down in the direction of arrow Q is possible at any time. When the further limit switch 71 is triggered, there is no further travel and therefore no further travel in the direction of the arrow Q is possible. The emergency end position is triggered. The same structure could also be provided on the lower limit switch bar 51.

Another embodiment is in Fig. 22 shown schematically. In this embodiment, the limit switch strips 50, 51 are connected to each other via a linkage 72. Thus, if the upper limit switch bar 50 is pressed in the direction of the carriage 13 out, the lower limit switch bar 51 moves at the lower end 7 by the same amount down and thus away from the carriage. The linkage 72 is connected to an actuator plate 73, which moves with a displacement of the linkage 72 with this. The actuator plate 73 are the limit switches 74, 75 assigned. In this case, the left limit switch 74 is designed as a single-stage and the right limit switch 75 as a two-stage limit switch.

Upon depression of the lower limit switch bar 51 in the direction of the carriage, the single-stage limit switch 74 is actuated, which results in the emergency stop. In another embodiment, not shown, the limit switch 74 could be formed in two stages.

In the direction of actuation at the top, the two-stage limit switch 75, which protects the upper limit switch strip 50, remains unactuated. On the other hand, if the upper limit switch bar 50 becomes the carriage, i. pressed down, the actuator plate 73 in a first stage triggers first of a stop, with the continued upward travel is no longer possible, but a free ride in the direction of arrow Q, i. downwards, is possible. In the case of a second-stage trip, the emergency stop is also performed here, with which it is no longer possible to drive.

Also at the in Fig. 22 shown embodiment of the arrangement of the limit switch strips compression springs 63 are provided which push both limit switch strips 50, 51 outward, ie away from the carriage. Likewise, also in this embodiment, in Fig. 22 However, not shown counter bearing for the compression springs 63 (similar to the bearings 65 in Fig. 21 ) and bearings 66 for guiding the linkage 72 in the longitudinal direction.

The according to Fig. 22 two-stage trained limit switch 75 could also be designed as a single-stage limit switch.

The drive unit 15 integrated in the carriage 13, ie in the lift 3, has an electric motor, preferably a battery-operated electric motor. This electric motor is connected to the belt drum 42, in FIGS. 12 and 13 shown schematically connected on the drive side.

According to the Fig. 1 . 2 and 14 the arrangement 1 according to the invention comprises a ladder 2, in particular a rung ladder, and a lift 3 movable along the ladder 2 having a structure as described above. In this respect, the lift in the arrangement according to the invention is a so-called ladder lift.

According to the Fig. 4 to 11 the carriage 13 in the open position of its rolling and / or sliding device 14 on the conductor 2 can be used (see Fig. 5, 6 and 9 ) and in the locked position of its rolling and / or sliding device 14 along the ladder 2 securely supported movable (see, for example Fig. 4 ).

As further in the Fig. 1 . 2 and 14 represented and in the FIGS. 23 to 25 shown in more detail, the free end 76 of the support means, namely preferably the webbing 43, attached to a bracket 77. This holder 77 is connected to the ladder 2, preferably with one or more rungs 80 thereof. According to the in Fig. 23 shown embodiment of the bracket 77 has these U-shaped bent ends 81, 82, with which the bracket 77 is mounted on two rungs 80. The holder 77 further has a receptacle 83, by means of which in the FIGS. 23 to 25 webbing not shown in detail on the hooked to the rungs 80 part of the bracket 77 can be fastened. The receptacle 83 has a U-shaped cross-section and on its front side 84 slots 85 over which the webbing safely and permanently, but still releasably, with the receptacle 83 is connectable. By means of a U-shaped hook 86, the receptacle can then be hooked to the part of the holder 77 fastened to the rungs. In Fig. 23 For this purpose, a side view of the hooked to the conductor 2 holder 77 with receptacle 83 is shown schematically. Fig. 24 shows a perspective view Fig. 25 a side view of the receptacle 83rd

It should be noted that the locking of the holder 77 can be done on the ladder with the help of the rungs at any desired location without tools. The webbing itself can also be hung without tools via the receptacle 83 on the holder 77. The aforementioned suspension operations can also be carried out so that a removal of the recording of the holder or the holder of the ladder can only be done by triggering, ie releasing, a locking bolt. The control of the lift can be done via a radio control and / or smartphone app or via Bluetooth. Load handler 87 (see Fig. 1 ) can be hung without tools on the carriage 13 of the lift 3. The Ladder 2 is, for example, such as those in the DE 20 2015 008 498 is described. For this purpose, the longitudinal bars 88, 89 of the ladder may each have a lateral guide rail 90. The guide rails 90 of the two longitudinal beams 88, 89 of the conductors 2 thus have each other, as in the 4 to 6 is indicated. The ladder therefore serves as a rail for the lift and, according to a double effect, can also be used as a regular stepladder. As previously mentioned, the ladder can be a ladder or laying ladder or designed as an extension ladder. Two conductors can be connected by means of a connector not shown in detail to a ladder. This allows conductor lengths of up to 10 m. As a ladder ladder, for example, has a length of about 2.5 m, as a simple deployed ladder a length of about 5 m, with extension by a folded ladder can be a length of about 7.5 m reach. Are both ladders connected and unfolded, resulting in a total length of about 10 m. That in the 4 to 6 shown and previously described ladder profile allows safe guidance of the lift 3 along the ladder second

The position of the in the FIGS. 7 and 8 Locking mechanism 24 shown can be queried by a forcibly operated limit switch (not shown). This can be connected so that the lift can only drive in the locked state of the locking mechanism, since the lift is otherwise in emergency stop.

As previously mentioned, the limit switch bars 50, 51 are as shown in FIGS FIGS. 21 and 22 biased by compression springs 63. If these fail on the upper limit switch bar 50, gravity automatically causes the on-end or the on-off switch to be actuated. At the lower limit switch bar 51, the function is ensured even with broken springs, as the bar is pushed up in all operating positions. An obstacle on the way will push the respective limit switch strip a few millimeters in the direction of the carriage, causing the machine to stop immediately. The braking is done by the engine brake and thus faster than with the brake cam 62 (see FIGS. 12 and 13 ). The housing of the carriage may for example be made of acrylonitrile-butadiene-styrene (ABS) copolymers and thereby have crumple zones.

For a lift and an arrangement of ladder and lift are created, which are easier to handle than before.

Claims (10)

Lift, in particular ladder lift, for the vertical transport of loads (12), with a carriage (13) accommodating the load (12), a rolling and / or sliding device (14) and a drive unit (15) for moving the load (12 ) along a route (16),
characterized in that
the drive unit (15) is integrated in the carriage (13) and the rolling and / or sliding device (14) comprises means (17), with the aid of which the rolling and / or sliding device (14) from an open to a locked position and conversely is convertible. Lift according to claim 1, characterized in that the rolling and / or sliding device (14) in the longitudinal direction (20) of the carriage (13) extending skids (21, 22) and the means (17) on at least one of these skids ( 21, 22) are formed acting. Lift according to claim 2, characterized in that two parallel side by side arranged skids (21, 22) are provided and the means (17) are arranged and formed such that both skids (21, 22) in the transverse direction (23) of the carriage (13 ) to each other in the open position and away from each other in the locked position and vice versa. Lift according to claim 1 or 2, characterized in that two parallel juxtaposed skids (21, 22) are provided and the means (17) are arranged such that only one (22) of the skids (21, 22) from the open in the locked position and vice versa is pivotable. Lift according to one of the preceding claims, characterized in that the carriage (13) for moving the load (12) along the path (16) connected to the drive unit (15), a belt drum (42) for winding or unwinding of a support means preferably in the form of a webbing (43). Lift according to one of the preceding claims, characterized in that the carriage (13) has a safety device (44, 45; 46) preferably connected to the drive unit (15), the limit switch strips (50, 51) pointing in the direction of travel and counter to the direction of travel / or means (52) for monitoring a taut suspension means preferably webbing (43), the process of the load (12) along the path (16) is stopped or at least partially prevented when actuated. Lift according to one of the preceding claims, characterized in that the drive unit (15) has a preferably battery operated electric motor. Arrangement with a ladder (2), in particular rung ladder, and a lift (3) movable along the ladder (2) according to one of the preceding claims. Arrangement according to claim 8, characterized in that the carriage (13) in the open position of its rolling and / or sliding device (14) on the ladder (2) used and in the locked position of its rolling and / or sliding device (14) along the ladder (2) safely supported is movable. Arrangement according to claim 8 or 9, characterized in that the free end (76) of the support means, preferably the webbing (43) on a holder (77) is attached to the ladder (2), preferably with one or more rungs (80 ) thereof, is connectable.

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