EP0187975B1 - Lift, in particular an inclined lift with a rail comprising several telescopic elements - Google Patents

Abstract

An elevator, especially an oblique elevator, has a plurality of telescopic sections, along which a load container is movable. The telescoping of the sections takes place in such a manner that all the telescopic sections move simultaneously in relation to one another, or in such a manner that, as a given telescopic section extends, it takes with it all those arranged after it, as a "pack". For the purpose of locking in any desired position of extension a locking/unlocking device is provided between each pair of adjacent telescopic sections. This locking is effected by the actuation of a draw cable attached to the lowermost telescopic section, the draw cable acting upon an actuating cable which effects the locking or unlocking. The actuating cable runs in tackle block manner around two cable guides, and is shortened or lengthened by the variation of spacing of two cable guides.

Description

The invention relates to a goods lift, in particular an inclined lift, with a rail composed of a plurality of telescopic sections for guiding a goods lift container and with a cable-operated locking or. Unlocking device between two telescopic sections that can be moved relative to each other.

A freight elevator with a telescopic rail is known (DE-A-300 1410), which has a plurality of telescopic sections that are relatively movable with respect to one another. In the known goods lift, all telescopic sections are extended at the same time by operating a cable winch, i.e. A relative movement takes place simultaneously between all telescopic sections - possibly with the exception of the first telescopic section.

It is desirable that all telescopic sections can be locked with each other in their respective extended position when an arbitrary extension length is reached. This locking takes place in the known device in that a pulling rope assigned to the lowest telescopic section is actuated, which causes both the locking between the lower telescopic section and the subsequent one as well as the pivoting movement of a pivotable body arranged on the lowest telescopic section. This swiveling body, in turn, shortens another pulling rope due to the swiveling movement, which runs from the lower end of the next telescopic section to the upper end of the same, and by shortening both the interlocking between the next telescopic section and the following one, and in turn the swiveling movement of a swiveling body.

The known device already has the advantage that by actuating only a single pull cable section, all other pull cable sections can be actuated and thus all telescopic sections can be locked to one another without a long cable being guided over all telescopic sections (with the disadvantage of cable elasticity and thus imprecise response characteristics the locks) is required.

It has proven to be in need of improvement in the known locking device that relatively high rope tensions in the individual pull ropes - and thus corresponding forces for actuating the same - are required if the locking is to respond exactly. This means a corresponding maintenance and control effort. In addition, the "shortenings" or "extensions" caused by the pivoting of the known pivotable body in the rope are very small, so that for this reason too, a very exact adjustment of the rope tension is required. Furthermore, it was found to be disadvantageous that the "extension" or "shortening" introduced into the actuating cable for the locking practically corresponds to that which is introduced into the - longer - traction cable, which runs over the pivotable body to the next telescopic section. It is obvious that the rope elasticity inherent in the longer rope neutralizes part of this "extension" or "shortening".

The object on which the application is based is to use the known advantages of the solution according to the device of DE-A-30 01 410 to increase the response accuracy and reliability of the lock with reduced effort by preventing the rope extension and rope shortening from being neutralized by rope stretching . The response accuracy and reliability of the lock should be increased as a result.

The above object is achieved with the teaching of claim 1.

After the solution according to the invention is no longer by the pull rope - as in the known hours. T. - the pivoting of a swiveling body and thus the shortening of the next traction cable and the actuating cable for locking, but the distance between two cable guides - which are looped like a pulley by the next traction cable or the actuating cable - is changed. Due to the pulley-like wrap, the rope shortening is increased with reduced effort; this enlarged rope shortening allows a more defined pivoting movement of the locking cams. Since, according to the teaching of claim 1, both the rope guides for the actuating rope and the rope guides for the pulling ropes are variable in distance and both rope guides are coupled to one another, the change in distance of the pulling rope is transmitted exactly to the actuating rope and a perfect locking or unlocking is effected.

Further features of the invention are characterized in the subclaims.

Claims 2 and 3 relate to an embodiment of the coupling between the variable-distance cable guides for the operating cable on the one hand and the traction cable on the other hand using a carrier connecting the two cable guides.

Claim 4 characterizes the advantageous assignment of the individual pulling cables or operating cables to the individual telescopic sections; the arrangement of the cable guides characterized in claim 4 can, in a corresponding embodiment of the invention, also be arranged at the lower end of the telescopic sections and serve here for locking or unlocking pivotable cam carriers, pawls or the like.

According to claim 5, the arrangement of the cable guides for the actuating cable on the one hand and the traction cable on the other hand is such that the movable cable guide of the traction cable undergoes a greater change in distance than the movable cable guide of the actuating cable; this is particularly advantageous because the Traction rope is much longer than the operating rope, so that the greater rope elongation can be neutralized in this way with the same tensile stress.

Claims 6 and 7 contain advantageous refinements of the teaching according to Claim 5, according to which there is, as it were, a "translation" between the change in rope length of the actuating rope on the one hand and the traction rope on the other hand.

With the return spring characterized in claim 8, the locking or unlocking device can be returned to its original position, so that the pull cables are moved against the actual direction of actuation.

In order to be able to set the tension of the individual pulling ropes exactly - which must be constantly increased from the last telescopic section to the following telescopic sections - a tensioning device is provided for each pulling rope.

It goes without saying that the device according to the invention must be designed in such a way that it is designed as an automatically engaging locking device and the actuation of the pull rope serves for unlocking. Likewise, the device can be designed such that it is constantly spring-loaded in the unlocked state and the spring force is overcome when the pull rope is actuated and the lock is produced.

The invention is explained in more detail below using an exemplary embodiment.

• Fig. 1 in schematischer Darstellung fünf in Draufsicht nebeneinander dargestellte Teleskopschüsse eines Lastaufzuges
• Fig. 2 das obere Ende des letzten Teleskopschusses V sowie das untere Ende des vorletzten Teleskopschusses IV
• Fig. 3 einen Schnitt gemäß Fig. 1 nach der Linie A-B

Show it:

• Fig. 1 shows a schematic representation of five telescopic sections of a goods lift shown side by side in plan view
• Fig. 2 shows the upper end of the last telescopic section V and the lower end of the penultimate telescopic section IV
• Fig. 3 shows a section according to FIG. 1 along the line AB

From Fig. 1 five telescopic sections of a goods lift can be seen in plan view, which were designated I-V. The telescopic sections 111, IV, V are assigned a locking or unlocking device designated by 1, each consisting of a locking and unlocking device between the telescopic section itself and the next one (cable guides 3 and 4) and a further cable guide (cable guides 11 and 12 ) for tensioning the pull rope 6 ', 6 ", 6"' for the next telescopic shot. The second telescopic section 11 has only cable guides 3 and 4 for actuating the actuating cable 2. The telescopic section I does not require a corresponding locking or unlocking mechanism.

2 and 3, the upper end 8 of the last telescopic section V is shown in the upper image plane, the lower end 9 of the next (penultimate) telescopic section IV in the lower image plane. It can be seen that the lower end 7 (see FIG 1) coming pull rope 6, which can be actuated by means of a hand lever 21, is guided in the region of the upper end 8 of this telescopic section over a deflection roller 22 and is fixed to a stop 23 of a carrier 13. The carrier 13 is rotatably supported at a pivot point 18 and is fastened to a rung 14 of the telescopic section V via a bracket 24.

Two additional brackets 25 are arranged on the rung 14 and are used for the displacement of cable guides 4 and 12. Similar cable guides 3 and 11 are displaced on the carrier 13. The cable guides are designed as rollers in the illustrated embodiment; the cable guide 4 is preferably designed as a double roller because of the more advantageous cable guide.

The cable guides 3 and 4 are wrapped in an actuating cable 2, which with its free ends 5 wraps around the shaft ends 26 of the locking shaft 27.

The cable guides 11 and 12 are wrapped in the traction cable 6 ', which is guided from the lower end 9 of the telescopic section IV to the upper end 10 (see FIG. 1).

It can be seen that when the hand lever 21 is actuated, a pull is exerted on the pull cable 6, which causes the carrier 13 to pivot about the pivot point 18. The cable guides 3 and 11 will move away from the cable guides 4 and 12, i.e. the distances a and b increase. This results in a shortening of the operating cable 2, so that the locking shaft 27 is rotated in the unlocking direction and the locking cams 28 come into the unlocking position and come to rest on the pin 29. At the same time, the pull rope 6 'is shortened, so that a corresponding pull is exerted on the carrier 13 assigned to the next telescopic section IV and so on (FIG. 1). Since the cable guide 11 is further away from the pivot point 18 than the cable guide 3, there is a greater shortening of the pull cable 6 ', which takes into account the larger cable length of the pull cable 6' (compared to the actuating cable 2) and thus the greater cable elasticity.

The rope tension of the individual pull ropes 6 ', 6 "and 6"' is adjustable via a tensioning device 19.

From Fig. 2 it can also be seen that the locking shaft 27 is assigned a spring 20, by means of which the locking cam 28 is generally moved into the locking position. In the exemplary embodiment according to FIG. 2, the actuating cable 2 is therefore used exclusively for unlocking.

With correspondingly oppositely arranged wrapping of the shaft ends 26 by the actuating cable 2, the locking shaft 27 can be rotated in the opposite sense, i.e. The locking cams 28 are basically brought into the unlocking position by means of the spring 20, the actuating cable 2 serving exclusively for locking.

Fig. 1 illustrates that corresponding locking or unlocking devices are provided at the upper ends 8, 10, 15 and 16 of the telescopic sections V, IV, III and II, while the upper end 17 of the telescopic section I remains free from such locking; the telescopic section I can be designed to be extended and bent separately.

Reference symbol list

• I = first telescopic shot
• II = second telescopic shot
• III = third telescopic shot
• IV = fourth (penultimate) telescopic shot
• V = fifth (last) telescopic shot
• 1 = locking or unlocking device
• 2 = operating cable
• 3 = cable guide for operating cable 2 (rollers or pairs of rollers)
• 4 = cable guide for operating cable 2 (rolls or pairs of rolls)
• 5 = free ends of the operating cable
• 6 = pull rope
• 6 '= pull rope
• 6 "= pull rope
• 6 "'= pull rope
• 7 = lower end of the last (fifth) telescopic shot V
• 8 = upper end of the last (fifth) telescopic shot V
• 9 = lower end of the penultimate (fourth) telescope shot IV
• 10 = upper end of the penultimate (fourth) telescopic shot IV
• 11 = rope guide for pull ropes 6 - 6 "'(rollers)
• 12 = rope guide for pull ropes 6 - 6 "'(rollers)
• 13 = roller carrier
• 14 rungs
• 15 = upper end of the third telescopic shot III
• 16 = upper end of the second telescopic section 11
• 17 = upper end of the first telescopic shot I
• 18 = pivot point
• 19 = clamping device
• 20 = spring
• 21 = hand lever
• 22 = deflection roller
• 23 = stop
• 24 = console
• 25 = console
• 26 = stumps
• 27 = locking shaft
• 28 = locking cams
• 29 = spigot
• a = distance
• b = distance

Claims (10)

1. Freight elevator, in particular sloping elevator, having a rail composed of a plurality of telescope runners (I - V) to guide a freight elevator container and having a rope-operated locking and unlocking device (1) between two telescope runners in each case, which are displaceable in relation to one another, characterized by the following features:

a) the locking and unlocking device (1) has two rope guides (3, 4) (rollers or pairs of rollers) around which an actuation rope (2) is at least partially wound, the free ends (5) of the actuation rope actuating the locking cams (28) being able to be lengthened and shortened by variation of the distance (a) between the rope guides;

b) the variation of the distance (a) of the rope guides (3, 4) is effected by a hauling rope (6 - 6"') which displaces or swivels at least one rope guide (3) in relation to the other rope guide (4);

c) the hauling rope (6) causing the variation of the distance (a) of the rope guides (3, 4) forms a rope section (hauling rope 6) extending from the bottom end (7) of the last telescope runner (5) to the top end (8) of the latter, a rope section (6') extending from the bottom end (9) of the penultimate telescope runner (IV) to the top end (10) of the latter, and so on up to the second telescope runner (II), all further hauling ropes (6' - 6"'), with the exception of the hauling rope (6) assigned to the last telescope runner (V), being guided on the preceding telescope runner via rope guides (11, 12) which are variable in terms of distance (distance b);

d) each of the hauling ropes (6; 6"') is led back to the rope guide (3, 4 and 11, 12) which is variable in terms of distance at the one end at the bottom end (e.g. 7, 9) of a telescope runner (II - V) and, at the other end, via a deflection roller (22) arranged at the top end (8, 10, 15, 16) of the same telescope runner.

2. Freight elevator according to Claim 1, characterized in that the rope guide (3,4) of the actuation rope (2), said rope guide being variable in terms of distance (distance (a)), and the rope guide (11, 12) of the hauling rope (6'-6"'), said rope guide being variable in terms of distance (distance (b)), are arranged on a common carrier (13).

3. Freight elevator according to Claims 1 or 2, characterized in that the carrier (13) is fixed in a swivelling manner on the telescope runner (II - V), preferably on a rung (14) of the latter.

4. Freight elevator according to one of Claims 1 - 3, characterized in that, in the region of the top end (16,15,10,8) of each telescope runner (II―V) with the exception of the first telescope runner (I), a rope guide (4) for the actuation rope (2) and - with the exception of the first and second telescope runners (I and 11) a rope guide (12) for the hauling rope (6' - 6"') is mounted non-displaceably in relation to the next telescope runner, and in that a further rope guide (3 and II), which is variable in terms of distance from it, is assigned to each of these rope guides.

5. Freight elevator according to Claim 4, characterized in that the rope guides (11, 12) for the hauling rope (6' - 6"') and the rope guides (3, 4) for the actuation rope (2) are mounted together on the telescope runner, in that each of the two rope guides has a fixed rope guide and a moveable rope guide, and the variation of distance (distance (b)) of the moveable rope guide of the hauling rope is greater than the variation of distance (distance (a)) of the moveable rope guide of the actuation rope.

6. Freight elevator according to one of Claims 1 - 5, characterized in that the rope guides (3 and 11), which are variable in terms of distance, are mounted nondisplaceably on a carrier (13), which is mounted in a swivelling manner on one side of the telescope runner (e.g. III - V) preferably on a rung (14) of the latter - in such a way that the rope guide (11, 12) for the hauling rope (6 - 6") has the greater distance from the swivel point (18) of the carrier.

7. Freight elevator according to one of Claims 1-6, characterized in that the hauling rope (6 - 6") is connected to the stop (23) of the swivelling body (13) between the rope guide (11) for the hauling rope (6' - 6"') (of the subsequent telescope runner) and the rope guide (3) for the actuation rope (2).

8. Freight elevator according to Claim 3, characterized in that a return spring (not illustrated) is arranged between the swivelable carrier (13) and the telescope runner (III - V).

9. Freight elevator according to one of Claims 1 - 8, characterized in that the hauling ropes (6' - 6"') are each fixed at the bottom end of the telescope runners (11 - IV) by means of a tensioning device (19).

10. Freight elevator according to Claim 1, characterized in that the locking and unlocking device (1) is constructed as an automatic lock loaded by a spring (20) and the actuation rope (2) serves solely for unlocking.

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