JPH0914400A - Multi-groove floating block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the dispersion of wear and lengthen the service life of a liner by forming a first annular part in such a way as to be bendingly deformed in accordance with the expansion of a first rope radially supported by a first groove. SOLUTION: A liner 31 consists of a first annular part forming a first groove, that is, a groove 44, a second annular part forming a second or intermediate groove, that is a groove 46, and a third annular part forming a third groove, that is, a groove 48. The first and third annular parts are deformed in such a way as to form an angle in accordance with the expansion/contraction of each rope part piece in the grooves 44, 48. The first and third annular parts can be bendingly deformed by slots 50. These slots 50 are formed into suitable size and arranged so as to be able to allow the bending deformation of the rope part pieces. The size and spacing of the slots 50 are determined by the application and characteristics of individual pulleys. The dispersion of wear is thereby reduced, and the operating life of the liner can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope drive system, and more particularly to a multi-slot pulley of a rope drive system for a rope propulsion transportation system.

[0002]

BACKGROUND OF THE INVENTION Floating sheaves in rope drive systems typically have replaceable elastic sheave liners with grooves for supporting and guiding the drive rope.

[0003]

The multi-groove sheaves in the above system result in undesirable wear variations on the sheave liner, i.e. uneven wear between the grooves of the multi-groove idler sheave. For example, in the three-groove liner of a floating pulley,
The two outer grooves wear out faster than the central groove, causing a reduction in the pitch radius of the outer grooves. The rate of wear of the outer two grooves increases after the reduction of the pitch radius. Therefore, in order to reduce or completely eliminate such variations in wear of the pulley liner, it is desired to provide a new and improved multi-groove idler pulley.

It is an object of the present invention to provide a new and improved multi-groove idler pulley assembly.

It is a further object of the present invention to provide a multi-groove liner in an idler sheave assembly which has reduced wear variations and thereby extended liner life.

Other objects will be apparent, in part, from the following description, and in part will be more fully described in the description below.

[0007]

With the following idle pulley of the rope drive system, the above-mentioned object is achieved and the problems of the prior art are solved. That is, the idler pulley includes a first annular groove that radially supports the first rope and a second annular groove that supports the first rope.
An annular peripheral surface around the rotation axis having a second annular groove that supports the rope in the radial direction is provided. The annular peripheral surface includes a first annular portion that forms the first groove and a second annular portion that forms the second groove. The first annular portion is formed such that it can be bent and deformed in accordance with expansion and contraction of the first rope radially supported by the first groove.

In another form of the invention, a multi-groove idler pulley comprises a cylindrical base having a central axis of rotation and an outer circumferential edge. The pulley liner extends along the peripheral edge of the base and has first, second, and third grooves for radially supporting the first, second, and third ropes, respectively. . The liner includes a first annular portion forming a first groove,
A second annular portion forming a second groove and a third annular portion forming a third groove
It has an annular part. The first annular portion is formed so that it can be bent and displaced in accordance with expansion and contraction of the first rope radially supported in the first groove, and the third annular portion is radially supported in the third groove. It is formed so that it can be bent and displaced according to the expansion and contraction of the third rope.

[0009]

The drawings depict specific forms of the invention, and the following description is made in specific terms to describe this form of the invention, which description is attached. It is not intended to limit the scope of the invention, which is defined by the claims.

In FIG. 1, a rope drive system for driving a shuttle car 12 generally comprises a drive cable or rope 14 and a rotary sheave 16, 18, 20, 22.
A tension weight 24, a drive pulley 26 attached to the output shaft of a motor 28, and an idler pulley 30. The pulley 30 is constituted by a three-groove floating pulley having a pulley liner. The rope 14 is pulled out from the shuttle 12, passes through the idler pulley 30 and is wound around the lower drive pulley 26, and then returns to the upper idler pulley 30 for a second winding, and is further lowered below the drive pulley 26. After the second winding, the idler pulley 30 is wound a third time and is wound on the rotary pulley 20 of the tension weight 24. The rope 14 is further wound around the rotary pulley 20 from the rotary pulley 20 and returned to the guide path (not shown),
It is returned to the shuttle car 12 via the rotary pulley 18 and the rotary pulley 16. The rope drive system generally described above is a conventionally used and known technique.

Now, for convenience of explanation, suppose that the system has only one rope, namely rope 14.
The three routes of the rope 14 wound around the idle pulley 30 are
Rope piece 32, rope piece 34, rope piece 36, respectively
Can be called. In such a form, variations in the tension of the rope stretched over the pulley liner cause variations in the expansion and contraction of the rope pieces. The difference in tension between the rope pieces is caused by the pulling action of the drive which accelerates and decelerates the shuttle car. Two adjacent rope pieces of the same tension determine the rotation of the idler sheave 30 when the shuttle car 12 is accelerated or decelerated. The third rope piece should expand and contract with different tensions and therefore slip on the idler sheave. Outer rope piece 3
Which of 2 and 36 has the same tension as the central rope piece 34 is determined by the direction of the shuttle car 12. For example, if shuttle car 12 were accelerated from the position of FIG. Rope piece 3
2, 34 determine the rotation of the idler pulley 30, and the rope piece 3
6 slips on the corresponding groove of the pulley liner. The slipping of the rope on the pulley liner causes wear, sometimes resulting in wear of the groove that supports the rope piece 32, and sometimes wear of the groove that supports the rope piece 36. The outer groove is more worn than the central groove, resulting in uneven wear.

The above-described wear occurs during acceleration / deceleration of shuttle car 12 and causes a decrease in the pitch radius of the outer groove of the pulley liner. As the reduction of the pitch radius progresses, variations in the circumference between the grooves will occur. That is,
The circumference of the outer groove is smaller than the circumference of the central groove. Now, assuming that the central groove determines the rotational speed of the idler pulley, the rope pieces in the outer groove should slip because they have a smaller moving circumference than the central one. A slight difference in the groove circumference develops into a large slip problem when the shuttle car is driven for a long time. That is, the rate of wear of the outer groove is accelerated. In other words, initial wear does not occur when the shuttle car is at a constant speed, but only when it accelerates or decelerates,
Once the pitch radius has been reduced by wear of the outer groove, wear occurs throughout operation and the rate of wear is accelerated.

2-5, the idler pulley 3 of the present invention.
0 has a cylindrical metal base 38 rotatable about a central rotation axis 40. The base 38 has an outer circumferential edge or recess 42 for mounting the annular polyurethane liner 31 thereon. The liner 31 includes three annular grooves 44, which are concentric with the shaft 40,
46, 48, whose grooves 44, 46, 48 radially support the rope pieces 32, 34, 36, respectively. The liner 31 traverses the grooves 44, 46, and 48, and has a plurality of slots 50 arranged at equal intervals on the circumference of the liner 31.
It has. In this embodiment, slot 50
Extends deeper than the grooves 44, 46 and 48 and radially inward.

Each adjacent pair of slots 50 comprises a radial piece 5.
2 and thus there are a plurality of radial strips on the pulley. The portion including the groove forming portion of each radial piece 52 is
It can be called "Iwaoka"("mesas", which is a coined word). More specifically, the portion of the radial piece 52 that includes the groove 44 and is supported in the radial direction is the first crest, the portion that includes the groove 46 and is supported in the radial direction is the second crest, and the groove 48.
A portion including and supporting in the radial direction can be called a third rock hill.

In FIG. 5, for convenience of explanation, the radial piece 52 is composed of the radial pieces 52A, 52B, 52C and 52D. The first portion or first rock mound of the radial piece 52A includes a groove 48 that radially supports the rope piece 36. Similarly, the first of the radial pieces 52B, 52C, 52D
The rock hill includes a groove 48 that supports the rope segment 36.

In the slot 50, the first rocks of each radial piece form an angle according to the expansion and contraction of the rope piece 32 until sufficient radial support of the rope pieces 32 and 36 is obtained. Like (along the circumferential direction) or along the tangential direction, and the third rocks of each radial piece are similarly deformed in accordance with the expansion and contraction of the rope piece 36. Are appropriately sized and arranged so as to allow

In FIG. 5, the rope pieces 32, 34 have the same tension and the rope pieces 36 have different tensions, which results in the rope 36 extending and thereby relative to the ropes 32, 34. It is displaced. The third rock hill supporting the rope 36 is deformed counterclockwise so as to form an angle (along the circumferential direction) or a tangential direction according to the extension of the rope 36. Radial piece 5
The front wall 54 and the rear wall 56 of 2A are deformed to form an angle from the normal rest position. This rest position is indicated by phantom line 58 for front wall 54 and phantom line 60 for rear wall 56. Similarly, the radial piece 5
Deformation (solid line) from the normal rest position (virtual line) of the third rock mound in 2B, 52C, and 52D is shown. When the rope 36 contracts, the third rock mound deforms in the opposite direction. Similarly, when the rope pieces 34 and 36 have the same tension, the first rocks are deformed according to the expansion and contraction of the rope piece 32. Deformation of the rocks in response to the expansion and contraction of the rope pieces substantially reduces or eliminates liner wear due to tension variations.

For convenience of explanation, the liner 31 includes a first annular portion forming a first groove, that is, a groove 44, and a second annular portion forming a second or intermediate groove, that is, a groove 46.
The third groove, that is, the third annular portion forming the groove 48. The first and third annular portions are deformed so as to form an angle according to the expansion and contraction of the rope pieces in the grooves 44 and 48. In this embodiment, the bending deformation of the first and third annular portions is made possible by the slot 50, which is appropriately sized to allow the rope pieces 34 and 38 to bend. Formed and placed. The size and spacing of the slots 50 is determined by the particular application and characteristics of the pulley.

Thus, an improved multi-slot idler sheave has been demonstrated for reducing wear variability and extending liner operational life.

As will be apparent to those skilled in the art, the modifications and improvements of the structure described above can be easily made without departing from the spirit of the present invention and the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a rope drive reciprocating system.

FIG. 2 is an enlarged perspective view of a floating pulley of the present invention.

FIG. 3 is a sectional view taken along the line 3-3 in FIG.

FIG. 4 is a perspective view of the pulley liner of FIG. 2 enlarged and partially broken.

5 is a view similar to FIG. 4 with the addition of a pulley liner supporting a drive rope.

[Explanation of symbols]

 30 ... Floating pulley, 31 ... Liner (annular peripheral surface), 32 ... First rope part (first rope), 34 ... Second rope part (second rope), 36 ... Third rope part (Third rope), 38 ... Base, 42 ... Circumferential edge, 44 ... First annular groove, 46 ... Second annular groove, 48 ... Third annular groove, 50 ... Slot, 52A, 52B, 52C, 52D ... Radial piece.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Peter Oh. Arlandsen USA, Connecticut, South Glastonbury, Pea. Oh. Box 98 (72) Inventor John Kennedy Salmon United States, Connecticut, South Windsor, Felt Road 230

Claims (7)

[Claims] 1. A floating pulley for a rope drive system, comprising a rotating shaft, a first annular groove that radially supports a first rope, and a second annular groove that radially supports a second rope. And an annular peripheral surface around the rotation axis, wherein the annular peripheral surface includes a first annular portion forming the first groove and a second annular portion forming the second groove. A multi-groove idle pulley, wherein the first annular portion is configured to be bent and deformed in accordance with expansion and contraction of a first rope radially supported in the first groove. 2. The annular peripheral surface comprises a third annular portion forming a third annular groove for radially supporting the third rope, the third annular portion having a diameter within the third groove. The multi-groove idle pulley according to claim 1, wherein the multi-groove idler pulley is configured to bend and deform in accordance with expansion and contraction of the third rope supported in the direction. 3. The multi-groove idler pulley according to claim 2, wherein the second groove is arranged between the first groove and the third groove. 4. A cylindrical base that rotates around a central rotation axis and has an outer circumferential edge, and extends to the circumferential region of the circumferential edge of the base, and extends the first, second, and third ropes. Liners having first, second, and third grooves for respectively supporting in the radial direction, the liner having a first annular portion that forms the first groove,
A second annular portion forming the second groove and a third annular portion forming the third groove, wherein the first annular portion extends and contracts the first rope supported in the first groove. Bending displacement is possible according to
The idle pulley assembly, wherein the annular portion is bendable and displaceable in accordance with expansion and contraction of the third rope supported in the third groove. 5. The liner includes the first, second and third lines.
5. The idler pulley assembly of claim 4 including a plurality of radial slots across the groove. 6. Adjacent first and second slots of said plurality of slots form a radial strip between them, said radial strip comprising a first portion including said first groove. A second portion including the second groove and a third portion including the third groove, wherein the first portion responds to expansion and contraction of the first rope radially supported in the first groove. The idle pulley assembly according to claim 5, wherein the third portion bends and deforms, and the third portion bends and deforms in accordance with expansion and contraction of a third rope radially supported in the third groove. 7. The plurality of radial slots form a plurality of radial pieces, each piece being defined by an adjacent slot, and a first portion including a first groove, and a second portion. A second portion including a groove and a third portion including a third groove, wherein the first portion is
The first portion is bent and deformed in accordance with expansion and contraction of the first rope radially supported in the first groove, and the third portion is expanded and contracted in response to expansion and contraction of the third rope radially supported in the third groove. The floating pulley assembly according to claim 5, wherein the floating pulley assembly is bent and deformed.