AU5793473A - Belt conveyors - Google Patents

Description

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TEST CHART RESOLUTION MICROCOPY OURAUOF5TANDADS-1963 NATIONAL

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19 4 W F6tM 4 COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952.69

Convention Application for 000 JACK BRITTON .0

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12, Marlborough Street, Portobello, 00 Edinburgh 15, Scotland 0

hereby apply for the grant of a Patent for an invention entitled

"IM4PROVEMETS RELATING TO BELT CONVEYORS"

*0*0

which is described in the accompanying complete specification. 0 This application is a Convention Application and is based on the application numbered 32, 592/72

for a patent or similar protection made in England

on 12th July, 1972

My address for service is: .3= Care: SPRUSON FERGUSON PATENT ATTORNEYS ESSO -OAbW]* HOUSE, R, KENT STREET SYDNEY, NEW SOUTH WALES 2000 VATENT OFICE AUSTRALIA.

Dated this NINTH day of JULY, 19 73

JAC

By 5soW&"A4VGR&- To: Registered Patent Attorney The Commissioner of Patents

COv1MJ WBELTH OF AUSfTRALIA

Patents Act 1952-1966

DECLAIATIOUJ IN SUPPOitT OF A CONVENTIUN APPLICATIOI\ FOR PATENT UR PATiNT OF iA.ITION

In support of the Convention Application made for a Patent for an Invention entitled:

"Improvements relating to Belt Conveyors"

I, JACK ~itlTTON, of 12,Iarlborough Street, Portobello, Edinburgh 15, Scotland, do hereby solemnly

and sincerely declare as follows:-

1. I am the Applic:ant for the Patent.

2. The basic Application as defined by Section 141 of the Act was made in London,. England, on the 12th day

July 1972 under Application No.32,592/72, in my name.

3. I am the Inventor of the Invention.

4. The basic Application referred to in paragraph 2

of this Declaration was the first Applicat.ion made in a Convention country in respect of the invention the subject S

of the Application.

Declared at Edinburgh, Scotland

the 22nd day of June 1973.

-i

To: The Commissioner of Patents, Canberra, A USTRALIA.

COMMONWEALTH OF AUSTRALIA Form to PATENTS ACT 1952469

COMPLETE SPECIFICATION (ORIGINAL) FOR OFFICE USE

sq'ss Int. Cla"~ 8&76!1.A Application Number '/'293 Lodged:

Complete Specification Lodged I C- '3C-V 0 Aecepd: qPlzeD Published: -t r olity -I Ia 7 -,z C 8. eRelated Art C, o~ a. 69 4 44- 2.2 v 41- 9 t5,6-Q -A 0 4

jtna6o Applicant JACK BRITTON

Addrss of Applicant 12, Marlborough Street, Portobello, Edinburgh 15, Scotland

Acthlinventor JACK BRITTON

Address fr*I Service Spruson Ferguson, Patent Attorneys, Esso House, 127 Kent Street, Sydney, New South Wales, 2000 Australia. F COMMONWEALTH 10 JUL 1973

PATENT OFFICE Complete Specification for the invention entitled:

"IMPROVEMENTS RELATING TO BELT COMEYORS"

The following statement is a full description of this invention, including the best method Of r F i. it known to me~: J-

This invention relate:s to belt conveyors of the kind

in which an endless conveyor belt is supported on rollers

carried by conveyor side structure and has particular,

but not exclusive, application to mine conveyors.

In certain conveyor installations the conveyor

belt does not operate centrally within the side struc-

ture but moves transversely to either side. The main

reasons for this are:

Malalignment of conveyor structure due to

pavement lift affecting floor mounted structure, roof movement in the case of suspended structure, or general malalignment

of conveyors involved in rapidly advancing 0.

or retreating mining projects. g Where adequate care has not been given to the

preparation of belt joints. o0* 0

The non-uniformity of conveyor belt throughout 00 its length due to unsatisfactory storage prior

to installation.

20 Variation in tension of the return belt .oo

due to variation in load on the carrying belt. As a result of the belt wandering, considerable damage has been experienced due to the belt edge

rubbing against the conveyor side structure either

horizontally or deflecting downwards in the direction

of the roller spindles, producing the following defects:-

1. Considerable damage to the conveyor belt edge

which ultimately allows moisture to contaminate

the belt carcase, causing premature belt failure

and in the case of ply construction belts, ply

separation.

2. As a result of belt edge deterioration, belt fibres accumulate and wrap around the

roller spindles extension, which prevent the

roller from rotating, introducing a possible

fire hazard. 3. Belt fibres also penetrate the bearings of the rollers, resulting in premature failure 00Q0

•0 0 of the rollers. In this situation, due to the .0'o conveyor roller remaining static whilst the 00

belt is operating, the belt wears the roller shell and end cap with consequent additional

belt damage and further fire risk.

4. The regular rubbing effect between the belt edge and the supporting structure wears through the vertical support material, resulting in the

collapse of tbe structure. q. 00 0 5. In long conveyor installations, the combined

effect of the aforementioned disadvantages 0 will adversely affect the power requirements of

the conveyor drive.

It has to be accepted that in practice trans-

verse belt wandering cannot be completely eliminated

and the object of this invention is to eliminate

the defects caused by the belt wandering, more partic-

ularly, but not exclusively, during the return run of the belt.

According to this invention belt deflector surfaces

are provided on the conveyor side structure at the

roller positions, each deflector surface being inclined

downwardly from the side structure from a level above the upper surface of the adjacent end of the

roller to a position below said upper surface. If

io .0 the belt wander occurs the belt will move transversely

of the end of the roller and slide up the deflector .surface, thus preventing both edge wear on the con- veyor belt and wear on the supporting structures.

One belt conveyor arrangement embodying the

invention will now be described by way of example

with reference to the accompanying drawings, in

which: Figure 1 shows a cross-section through an end- less belt conveyor with a conventional idler roller

set to which deflector members providing belt deflector

surfaces in accordance with the invention have been

fitted,

Figure 2 shows a front elevational view of one of the deflector members,

Figure 3 shows a side elevational view of the

deflector member,

Figure 4 shows a deflector member mounted at

the position of an end roller of the conveyor belt,

Figure 5 shows a modification in which a deflector

surface is formed by shaping the conveyor side structure, and

Figures 6 and 7 illustrate the deleterious effects

of belt wander if deflector surfaces in accordance

with the invention are not used. G* In Figure 1 of the drawings is shown a typical o. idler roller set of a belt conveyor in which the forward run of the belt 1 is over troughed idler rollers 2

and the return run is over idler rollers 3, the idler

rollers 2 and 3 being supported in side structure 4.

At the position of the return idler roller deflector

members 5 are mounted on the conveyor side structure

4 and provide deflector surfaces 6. 'o Figure 1 shows the effect of providing a

deflector member 5 adjacent the idler roller 3 during belt wander. The downward inclination of the deflector surface 6 from the structure 4 from a level

above the upper surface of the idler roller 3 to a

position below the upper surface of the idler roller 3 causes the flat undersurface of the belt 1 to slide up the surCaoe 5 if wander should occur and if the wander continue: the belt will slide up the inside of the structure 4 as shown in Figure 4, thus preventing both edge wear of the conveyor belt 1 and the structure 4.

Deflector surfaces 6 can within the scope of the

invention be placed at other vulnerable points within

the conveyor length where the belt comes into contact

with rollers, i.e. rotating assemblies, for example

delivery and receiving points, bend pulleys etc.,

as shown in Figure 4 for a bend pulley 14.

Figures 2 and 3 show in greater detail and by way of example one deflector member construction and

.the manner in which it is associated with the typical

idler roller set shown in Figure 1. The deflector member 5 is welded at the approp- riate angle of inclination on to a vertical supporting

bracket 7. The lower edge 8 of the deflector surface 6 is profiled to fit around the end of the idler roller

,0 3 so that it can take up the position shown in Figures 2 and 3.

The idler roller 3 is supported by its spindle 9 in a bracket 10 which is secured to the side structure The bracket 7 is provided with a bolt hole

11 for bolting it with the bracket 8 on the

side structure 4. The bracket 7 is also

bored to receive end of the idler spindle 9. Loop 12 welded on to the bracket 6 to provide a stop lir.iting axial movement of the idler roller 3 so that the idler roller 3 is prevented from fouling the deflector member

In Figure 5 a modification is shown in which a

deflector surface 6 is provided by shaping of the con-

veyor side structure 4. This shaping is achieved by

cranking the conveyor side structure. The spindle 9

of the idler roller 3 is mounted in a slot 13 extending

down the side structure from the base of the cranked JO portion. Three such slots may be provided to give

three alternative mounting positions for the idler roller

J 3. 0** Thus the dlefector surface may be embodied as 0* 0

an integral part of a conveyor side structure or

formed as part of a deflector member which is fitted 0oo

to conveyor side structures of varying design as a

separate component.

on The examples described show the deflector surface only in association with flat idler rollers but the *o

invention may be applied to rollers consisting of a

suitable number of rollers forming a group, either

flat or semi or fully troughed.

Figures 6 and 7 show the various results of belt wander if the deflector surfaces in accordance with

the invention are not provided, Figure 6 shows

belt edge rubbing with downward deflection of the

belt edge.

Claims (9)

The claims defining the invention are as follows:-

1. A belt conveyor of the kind in which an endless

conveyor belt is supported on rollers which are carried

by conveyor side structure, wherein belt deflector surfaces

are provided on the conveyor side structure at the roller

positions, each deflector surface being inclined downwardly

from the conveyor side structure from a level above the upper surface of the adjacent end of the roller to a

level below the said upper surface.

2. A belt conveyor according to claim 1, wherein

the deflector surface at its lower edge is profiled

to fit around the end of the roller so that it extends

*.e on both side of the roller.

3. A belt conveyor according to claim 1 or 2,

wherein each deflector surface is provided by a member which is secured to the conveyor side structure.

4. A belt conveyor according to claim 3, wherein

a mounting bracket by which the deflector member is mount-

Sed on the side structure receives the roller spindle

"and has a stop for engaging the end of the spindl.e

to limit movement of the roller towards the S. deflector surface.

eac

5, A belt conveyor according to claim 1, wherein

each deflector surface is provided by shaping of the

side structure.

6. A belt deflector member for a belt conveyor of the kind in which an endless belt is supported on rollers which are carried by a conveyor side structure, the belt deflector member being adapted to be secured to the conveyor side structure at a roller position so that it provides a deflector surface which inclines downwardly from the conveyor side structure from a level which is above the upper surface of the adjacent end of the roller to a position below the level of said upper surface.

7. A belt deflector member according to claim 6,

and which is profiled at the lower edge of the deflector

surface to fit around the adjacent end of the roller and so extend on both sides of the roller. S

8. A belt conveyor having belt deflector surfaces substantially as hereinbefore described with reference S**

to the accompanying drawings.

9. A belt deflector member substantially as

hereinbefore described with reference to Figures and of the accompanying drawings. *0

DATED this NISTH day of JULY, 1973 JACK BRITTON Patent Attorneys for the Applicant SPRUSON FERGUSON

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