GB2122270A

GB2122270A - Sliding guide part for slide pieces moved on guide rails

Info

Publication number: GB2122270A
Application number: GB08218007A
Authority: GB
Inventors: Gerhard Kieffer
Original assignee: Acla Werke GmbH
Current assignee: Acla Werke GmbH
Priority date: 1982-06-22
Filing date: 1982-06-22
Publication date: 1984-01-11
Also published as: GB2122270B

Abstract

The sliding guide part 1 for sliding parts made of elastic plastics moved on guide rails, more particularly as linings for guide shoes of lift cages and the like consists of a plate shaped part provided with protruding mounting studs 6, which is provided with longitudinally extending recesses 3, 4 for the formation of the so-called film hinging in order to obtain a U-shaped slide piece. The longitudinally extending cut-outs are formed as deep grooves (3, 4) of trapezoidal cross-section. The thickness of the connecting flanges at the narrow base of the trapezoidal groove is 1/6 to 1/10 of the thickness of the plate part separated by the longitudinal grooves (3, 4). <IMAGE>

Description

SPECIFICATION Sliding guide part for slide pieces moved on guide rails The invention relates to a sliding guide part for sliding pieces formed of elastic plastics, for example polyurethane, moved on guide rails, more particularly to a lining for guide shoes of lift (elevator) cages and the like.

Guide shoes of lifts are to be found to the side of the cage and serve for the stable and safe guiding of the basket on guide rails. The guide shoes are provided with linings which carry out the function of the sliding piece for the safe guiding of the basket along the guide rails and also for the reduction of abrasion. With this it is known to finish the sliding part with elastic plastic, for example polyurethane. Such linings have a Uform in cross-section and surround the guide rails on three sides.

It is known to provide the linings on the side directed away from the sliding surfaces thereof with studs which engage in holes in the guide shoe in order to connect the linings with respect to the guide shoe reliably and safely and withdrawably. Furthermore it is known to form the lining firstly as a plate-shaped part and to provide it with two longitudinally extending material neckings in order to achieve the effect of film hinging so that the plate shaped piece can be brought for mounting into the guide shoe in a Uform.

This invention has the object of providing a further formation and improvement in the slide piece of the lining for guide shoes starting from a plate shaped part. According to the invention the lining or the slide piece is delineated in that longitudinal recesses are formed as deep grooves of trapezoidal cross-section and the thickness of the connecting flanges at the narrower base of the trapezoidal groove is provided which is from 1/6 to 1/10 of the thickness of the plate pieces separated by the grooves. In this way the width of the connecting flange to the narrower base of the trapezium amounts to from 3/10 to 4/10 of the wider base side of the trapezium.

By such a formation of a plate shaped part of the lining or of the slide piece for the formation as U-shaped part on mounting in the guide shoe, a combination of essential advantages is achieved.

The relatively thin connecting flange in the connection with the formation of a deep trapezoidal groove allows an easy and troublefree bending into a U-form of the side of the plate shaped part separated by the trapezoidal slot and indeed furthermore going on somewhat further from this, the studs in the sides of the plate shaped part can be reliably and easily introduced into the holes in the sides of the rigid guide shoe.

The connecting flanges are only stressed during motion. Compressive stresses on materials are avoided. The width and depth provided for the trapeziums for the longitudinal recesses in the plate shape part have the additional consequence that longitudinally extending lubrication pockets of sufficient size are formed so that the lubrication of the sliding surfaces of the lining is ensured for a longer time. There is achieved a longer stock maintenance for the lubricant. The highly bent sides of the plate shaped part establish further and stronger spring action at the corresponding supporting surfaces of the guide shoe so that not only the grooves but also the abrasion being experienced by the adjacent parts of the surfaces at the guide shoe contributes to a trouble free and safe supporting of the lining in the guide shoe.

The aforementioned grooves therefore do not need to be formed especially large. Likewise as the assembly takes place easily, the disassembly of the U-shaped lining from the guide shoe can also be effected easily by hand so that the exchange of linings at the guide shoe can be carried out in a short time. Furthermore the formation of the sliding guide part according to the invention makes possible savings in tool costs.

According to a further feature of the invention, the plate parts separated by the trapezoidal grooves are formed bevelled at the edges free from the trapezoidal grooves. This leads to an improved overall gripping of the U-shaped lining at the guide rail.

The invention is explained as follows by means of an explanatory example shown in the drawing.

Figures 1 and 2 show an illustrative form of the lining or of the sliding piece according to the invention in side view and in plan view likewise schematically.

Figure 3 shows schematically in cut-away view the U-shaped assembled lining in a guide shoe.

The lining 1 as a sliding piece for guide shoes of lift cages and the like shows a plate shaped part 2 of elastic plastics, for example polyurethane which is provided on the side facing the sliding side with longitudinally extending recesses 3 and 4, with at the same time studs extending out of the rear side 5 being provided for holding in corresponding holes in a guide shoe 7.

The longitudinally extending recesses are formed as deep grooves of trapezoidal cross-section, with a comparatively thin connecting flange 8 or 9 remaining. The thickness of the connecting flange is in the region of about 1/6 to 1/10 of the thickness of the parts of the plate shaped part 1 separated by the grooves 3, 4.

Furthermore the width of the connecting flange 8 at the narrow base of the trapezoidal longitudinally extending cut-outs 3, 4 is so set that it amounts to about 3/10 to 4/10 of the wide base side 10 of the trapezoidai longitudinally extending recess.

In this way, there is achieved an easy assembly and disassembly of the plate shaped lining in the formation to a U-form and for the lining of the Ushaped lining in a corresponding recess 11 in the guide shoe. The trapezoidally formed longitudinally extending recesses in the formation provided lead in addition, with the U-shape formation of the linings to the lubricating pockets 12 and 13 which are correspondingly deep existing at the corners in order to be able to accommodate sufficient lubricant. At the same time the longitudinally extending pockets 12, 1 3 make possible the accommodation of abrasive particles and the like so that the slide surfaces are accordingly not loaded. With the movement of the lift cage along the guide rail it is not excluded that the lift cage might strike against the front end of the guide rails.These impact and pressure forces are taken up in the intermediate flange 14 of the lining 1. As a result of the deep pockets 12, 13 the flange 14 can be more or less compressed, that is extended into the space of the pockets 12, 1 3. Such impacts can therefore be especially advantageously elastically absorbed. At the same time a pumping effect is achieved with this by means of the flange 14 on the pockets 12, 13 which support the supply of lubricant from the pockets 12, 1 3 to the sliding surfaces.

Advantageously the plate parts separated by the longitudinally extending recesses 3, 4 provide the lining with chamfers 1 5 at the free edges of the trapezoidal grooves.

The described sliding guide part or the lining has furthermore special advantages from the point of view of materials. With the rigid metal guide shoe as uptake body it was necessary to use for the lining a material of elastic character so that the lining may be fitted into the accommodating part. Thus sliding guides could not be formed by moulding from polyamide in the retaining shoe. In the construction according to the invention, there can be used for the lining 1 also a relatively hard plastics such as polyamide or acetal resin which exhibit very good sliding properties since they can be built in without difficulty as a consequence of their previously described formation in rigid retaining shoes with anchoring by the studs 6.

Claims

1. Sliding guide part formed of elastic plastics material for use in the formation of a sliding piece moved on guide rails consisting of a plate shape part provided with extending studs and with longitudinally extending recesses for formation of so-called film hinges, to form said sliding piece as a U-shaped member, the longitudinally extending recesses being formed as grooves of trapezoidal cross-section and the thickness of connecting flanges at the narrow base of the trapezoidal groove being from 1/6 to 1/10 of the thickness of the plate parts separated by the longitudinal grooves.

2. Sliding guide part formed of elastic plastics material for use in the formation of a sliding piece moved on guide rails consisting of a plate shape part provided with extending studs and with longitudinally extending recesses for formation of so-called film hinges, to form said sliding piece as a U-shaped member, the longitudinally extending recesses being formed as grooves of trapezoidal cross-section and the thickness of connecting flanges at the narrow base of the trapezoidal groove being from 1/6 to 1/10 of the thickness of the plate parts separated by the longitudinal grooves and the width of the connecting flanges at the narrower bases of the trapeziums amounting to about 3/10 to 4/10 of the wider bases of the trapezoidal grooves.

3. Sliding guide part according to claim 1 or 2, wherein the plate parts of the lining sub-divided by the trapezoidal grooves are provided at the free edges of the trapezoidal grooves with chamfers.

4. Sliding guide part according to any one of claims 1 to 3, wherein the lining consists of relatively hard plastics material with good sliding properties.

5. Sliding guide part according to claim 4, wherein the plastics material is a polyamide or acetal resin.

6. Sliding guide part according to claim 1 or 2, wherein the plastics material is polyurethane.

7. Sliding guide part, substantially as hereinbefore described with reference to the accompanying drawing.

8. Lining for the guide shoe of a lift cage which is formed by bending into a U-shape a sliding guide part as claimed in any one of the preceding claims.