SK50097A3 - Pulley battery for monocable ropeways - Google Patents

Abstract

The rope carrier comprises from four to ten wheels on pivoted links mounted on e.g. a pylon, and the leading wheel differs from than the other wheels (2), in that it has no rope groove (10) and a taller inner flange (8). All wheels have a cylindrical, e.g. rubber, tyre (7) between outer (9) and inner flanges, and the height of the inner flange (8) is limited by the need to allow the clamps, with which e.g. chairs or gondolas are attached, to traverse the roller system. The inner flange height (B) is dictated by the clearance height (D) of the clamp relative to the bottom surface of the rope. By deleting the groove, the flange height of the leading wheel is increased by the depth (R) of the groove, to the full clearance height (D).

Description

Technical field

The present invention relates to a pulley battery for single rope gondola lifts.

BACKGROUND OF THE INVENTION

The pulley battery typically consists of four, six, eight or ten pulleys. With single-rope lifts, derailment of the drive rope on the pulley battery is one of the greatest dangers. Therefore, avoiding possible derailment of the rope is particularly important. The first pulley in the direction of travel of the tow rope, the so-called pulley pulley of the pulley battery, plays a leading role. Typically, the pulleys have an inner flange that prevents the rope from derailing inwards, i. j. in the direction of the track axis, and an outer skirt that prevents the rope from derailing outwards. In addition, the lining of the drive pulleys has a groove adapted to the rope diameter, which is usually circular in shape and which serves to guide the rope. In normal operation, the rope should not rub against the side flange as far as possible. With a correspondingly large lateral lead-in angle of the hauling rope on the pulley battery, the rope first exits the groove of the hauling pulley and then almost simultaneously the grooves of all subsequent battery pulleys. Possible derailment of the rope is prevented by the pulley flange. The clamp on which the respective means of transport (eg cabin, seat, conveyor, etc.) is attached to the towing rope limits the height of the outer rims as well as the depth of the groove. Certain minimum values for groove depth and rim size are set by different national regulations. The maximum height between the bottom of the groove and the top edge of the bead disc is given by the design of the fastening clamp, and the free throughput of the clamp and hinge must be guaranteed even at a certain swivel degree (usually about 20%). The height of the inner rim of the pulley, on the other hand, is not limited by the design of the clamp. The design-based maximum height between the bottom of the groove and the top edge of the rim disk makes it necessary to compromise when constructing the rim and the outer rim of the pulleys. With a very deep groove in the pulley lining, good rope guidance is ensured. However, if the rope leaves the guide groove, the risk of derailment is higher, since the outer rim of the pulley may have only a small height. By contrast, if the groove in the pulley lining is made with a minimum depth, the pulley flange can be very high. In this case, there is little rope guidance, but there is also little risk that the rope will jump over the pulley flange.

To date, all battery pulleys for single-rope gondola lifts have been designed with a groove of a certain depth in the pulley lining and a maximum high outer rim of the pulley corresponding to the clamp body on the tow rope. This significantly reduces the risk of derailment, but cannot be eliminated.

The object of the present invention is to solve the above-mentioned problems and to increase the safety against derailment of the rope of a single-rope gondola on the pulley battery.

SUMMARY OF THE INVENTION

The invention solves this problem by providing at least the first battery pulley lining in the direction of travel of the tow rope at least from the point of contact of the pulling rope on the pulley lining in normal operation substantially cylindrical to the outer side of the pulley lining; pulley respectively. pulleys with a substantially cylindrical lining have a groove in the pulley lining for guiding the tow rope. As a result, the outer rim of the pulley or the pulley can be removed. rollers with liner without groove make higher compared to the outer flange of grooved rollers, which significantly reduces the risk of derailment. As a rule, the outer rim of the pulley is made at a height that allows the clamp structure. In normal operation, i. j. when the rope is running in the grooves of the following pulleys, the first pulley or pulley does not have a pulley. each pulley without groove has no guiding function. This function is taken up by a pulley adjacent to the last pulley without a guide groove in the direction of travel of the tow rope. On this or each pulley without a groove, the rope is movable sideways to some extent.

The second pulley, respectively. the pulley adjacent to the last pulley without a groove is generally made with a groove with the maximum possible depth and therefore has the best guiding properties. In a critical state, i. j. when the tow rope jumps out of the guide, the first pulley, i.e. the pulley without a groove, assumes the guiding function, providing maximum protection against derailment of the tow rope, since the outer pulley flange has the maximum possible height.

Due to a particularly advantageous embodiment, at least the leading roller liner is cylindrical. This allows lateral movement of the tow rope without resistance and maximum rim projection.

Other features and advantages of the present invention will be described in more detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a battery of pulleys in side and front view, FIG. 2 is a cross-sectional view of the inventive pulley in the section plane II-II of FIG. 1, FIG. 3 is a cross-sectional view of the pulley following the leading pulley in the section plane III-III of FIG. First

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows a battery of pulleys for single-rope gondola lifts, consisting of four pulleys 1, 2, 3 and 4 which are arranged one after the other and rotatably mounted on a support assembly of the rods 5. In the example shown. According to the invention, the first pulley 1 of the battery is designed essentially with a cylindrical lining 7 and with one inner flange 9 and one outer flange of the pulley 8. Since the first pulley 7 in the rope direction has no groove design, this pulley does not assume the guide function The pulleys following the pulley without a groove, in the present example pulleys 2, 3 and 4, have a groove 10 and an outer flange 8 in the lining 7. In normal operation, the pulley performs its own guiding function to maintain the correct position of the tow rope 6 in the groove. In order to ensure good guidance, this pulley 2 and the following pulleys 3 and 4 have a groove of maximum possible depth.

In FIG. 2 shows a cross-section of the inventive start roller 1. The roller 1 consists of a lining 7, which is usually made of rubber or rubber. In normal operation, the guide rope 6 abuts substantially on the center of the lining 7. According to the invention, the lining 7 has from the point of contact of the pulling rope 6 on the lining 7 to the outside of the pulley lining substantially cylindrical shape. In FIG. 2, the lining is made entirely cylindrical for the sake of advantageous shape. Within the scope of the invention, the profile of the liner 7 may have a different shape from the point of contact of the pulling rope on the liner 7 towards the inner flange 9. Minor deviations from this substantially cylindrical pulley lining, such as low concavity or convexity of the pulley lining, are permissible as long as they have no guide function. The height of the inner flange 9 is not limited by the design of the clamp and is constructed as high as possible in order to prevent the rope from derailing as much as possible. On the other hand, the outer skirt 8 can only be made so high that the clamps (not shown) to which the means of transport are fixed, e.g. The suspension cabin, cabin, seat, chair combination, conveyors, etc., have not rubbed against the outer flange 8 even with a certain deviation. Therefore, the distance between the lowest possible point of the towing rope 6 on the pulley and the highest point of the outer flange 8 must not exceed a certain size. Therefore, in the case of the invented non-rebated roller 1, the height of the outer rim of the roller can be made with the maximum possible height D. With the roller 2 shown in FIG. 3, which has a groove 10 in the lining 7, the maximum possible height B of the outer skirt 8 corresponds to the height D of the rebated roller 1 reduced by depth T. The active height B of the skirt 8 is a decisive parameter in securing against rope derailment 6. The flange 8 also reduces the safety against possible derailment of the rope 6. In practice, the groove 10 has a circular shape in cross-section corresponding to the diameter of the rope 6, but this is of secondary importance due to the deformability and wear of the pulley liner. If the rope due to external action, such as

due to the strong wind, moved from its position defined by the pulleys with the grooves 10 and would run onto one of the flanges (8 or 9) of the first pulley 1, this pulley 1 of the battery takes on the role of a guide pulley and its maximum high outer flange 8 provides maximum derailment ropes outwards.

Crucial to the invention is a combination of differently constructed pulleys of the same pulley battery, which can significantly increase the safety against derailment of the tow rope. During normal operation, the rope guide assumes the first pulley in the direction of rope travel with the groove in the liner and the preceding or each previous pulley without a groove in the liner has no guide function. If the rope due to strong wind respectively. As a result of the oscillation, it moves the goodness and thus, at a certain lead-in angle, onto the lead-in pulley, a situation may arise that the rope jumps out of the grooves in the lining of the subsequent pulleys. In this case, the first rebated pulley assumes the guiding function in order to maintain the correct position of the tow rope and, with its maximum high outer rim, provides maximum protection against the derailment of the rope.

According to the present invention, not only the first roller in a slotless design has to meet special safety requirements, but also each additional roller in a slotless design and the first grooved roller adjacent to them in order to prevent these pulleys having a guide function from breaking. At the time, these requirements are only imposed on the first pulley for pulley batteries.

Claims (2)

PATENT CLAIMS A battery of pulleys for single rope gondola lifts, comprising a plurality of pulleys (1, 2, 3, 4) with a lining (7) rotatably supported and arranged one after the other on a support assembly of rods (5) followed by a traction cable (6), characterized in that at least the liner (7) of the first pulley (1) in the direction of travel (A) of the pulling rope (6) has at the point of contact of the pulling rope on the liner (7) - given at least during normal operation a substantially cylindrical shape and that the battery pulleys (2, 3 and 4) following the last pulley (1) with the substantially cylindrical lining (7) have a groove (10) in the lining (7) for guiding the tow rope (6) ). The pulley battery according to claim 1, characterized in that at least the lining (7) of the first battery pulley (1) in the direction of travel (A) of the tow rope (6) has a cylindrical design.