Diverting pulley adapter

Abstract

A diverting pulley adapter is provided for converting an existing pulley, the adapter enabling a maintenance of an existing running path for diverting a suspension, like an elevator-rope or an elevator-belt, the adapter having a base with at least one fixing component for anchoring the adapter, at which base a set of pulleys is provided. The adapter includes a first deflection pulley being mounted rotatable on its rotation axis, and at least a further second deflection pulley being mounted rotatable on its rotation axis, wherein the rotation axes of the pulleys are interspaced, respectively. The positions of those pulleys forming the set of pulleys are adjustable in view of their fixation, respectively, and symmetrically in relation to the fixing component.

Claims

1. A diverting pulley adapter for converting an existing pulley, the adapter enabling a maintenance of an existing running path for diverting a suspension, the diverting pulley adapter comprising: a base with a fixing component for anchoring the diverting pulley adapter; a set of pulleys provided at the base, the set of pulleys comprising: a first deflection pulley mounted rotatable on a rotation axis thereof; and at least a further second deflection pulley mounted rotatable on a rotation axis thereof, wherein the rotation axes of the first pulley and the at least a further second pulley are spaced from one another, wherein the positions of the pulleys forming the set of pulleys are adjustable in view of their fixation, respectively, and symmetrically in relation to the fixing component, and wherein each pulley of the set of pulleys is held in a respective longhole, which longholes are all arranged in the base and symmetrically with respect to the fixing component.

2. The diverting pulley adapter according to claim 1, wherein the longhole/longholes is/are curved.

3. The diverting pulley adapter according to claim 1, wherein the position of the pulleys are implemented such that its mounting position is continuously adjustable.

4. The diverting pulley adapter according to claim 1, wherein the suspension is one of an elevator-rope and an elevator-belt.

5. The diverting pulley adapter according to claim 3, wherein the longhole/longholes is/are curved.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is now described in further details with reference to the following drawings, in which

(2) FIG. 1A illustrates a prior art pulley assembly having a single pulley;

(3) FIG. 1B illustrates a diverter pulley adapter installed on two pulleys;

(4) FIG. 2A illustrates a prior art pulley assembly having a single pulley;

(5) FIG. 2B illustrates another example of the inventive diverting pulley adapter installed on two pulleys.

DETAILED DESCRIPTION OF THE INVENTION

(6) In FIG. 1A, a prior-art-pulley-assembly 10 is to be seen having a single pulley 12 rotating around a rotation axis 14. A suspension means 13 is running around the pulley 12 and forms a contact angle of 180. Said contact angle is formed between two points, i.e. the touching-point 16 of the incoming suspension means and the point where the suspension means leaves the pulley, i.e. the leaving point 18the terms incoming and leaving are of course dependent from the running direction of the suspension means which is assumed to be according to the arrow as shown but which naturally changes when operating the elevator. However, even when the running direction is turned, either said contact angle and said distance D between the two points 16 and 18 remain unchanged.

(7) In the examples shown in FIGS. 1A and 2A, the incoming path and outgoing leaving path of the suspension means are parallel by forming the constant distance D.

(8) FIG. 1B illustrates the inventive diverting pulley adapter 20, comprising a base 22 having a fixing component 24 to install the diverting pulley adapter for example at an existing machine room fixing point. Mounted to the base 22 are in this example two pulleys 12 each having a smaller diameter compared with the prior pulley of the existing pulley assembly 10, respectively. Each pulley 12 is mounted in a longhole, respectively, which longhole defines a possible moving path for the respective pulley. Each pulley is further rotating around its own rotation axis 14. Each pulley 12 can be moved along a connection-line of the rotation axes 14 being defined by the longhole. For example, the left pulley as shown in FIG. 1B can be moved along an adjusting distance a, while the right hand pulley 12 can be moved along an adjusting distance b. By means of these amounts a and b for adjusting the distance between the rotation axes of both the pulleys, the distance D is adjustable, too, and can be chosen such that it corresponds for example to the distance D of an existing pulley which is to be replaced.

(9) Further, both the positions of the pulleys 12 relative to the base 22 can be set by the invention, so that an existing running path of the suspension means can be maintained or adapted by choosing the variable positions.

(10) As can be seen from FIG. 1B showing the inventive adapter, the moving paths of both pulleys 12 forming the set of pulleys are arranged symmetrically in relation to the fixing component 24 of the base 22. Said symmetry is a line symmetry which line passes through the mounting hole of the base and being in a plane which is parallel to the base plate, i.e. meaning therewith the drawing line.

(11) When turning to FIG. 2B now, the longholes are both curved and defining therewith a curved moving line of each pulley, respectively. Here again, the longholes are arranged symmetrically with respect to the fixing component of the base. This construction realizes that the distance between the fixing point of the base and a pulley can be maintained constant while at the same time rendering the distance between the pulleys themselves forming the set of pulleys.

(12) It is to be noted that in case of curved longholes, the longholes can be connected at one side so that one single longhole arises in which both diverting pulleys are fixable.

(13) It is to be noted, that both embodiments as shown in FIG. 1B and FIG. 2B can be combined so that each position of any pulley 12 relative to the base 22 is adjustable in a free way so that the running path of the suspension means can be chosen accordingly. Further, although in the present drawings an example of the inventive diverting pulley adapter is shown with two pulleys, the invention is not restricted to said number but can comprise even more than two pulleys. In a best mode then, all the pulleys being encompassed by the diverting pulley adapter are adjustable along their respective moving paths.

REFERENCE NUMBERS

(14) 10 pulley assembly 12 pulley 13 suspension means 14 rotation axis 16 touching point of incoming suspension means 18 leaving point of the suspension means rotation angle 20 diverting pulley adapter 22 base 24 fixing component a adjusting distance of the first pulley b adjusting distance of the second pulley D distance 26 adjusting path of pulley 28 longhole