AU645150B2 - Improvements in belt conveyor training idlers - Google Patents
Improvements in belt conveyor training idlersInfo
- Publication number
- AU645150B2 AU645150B2 AU88535/91A AU8853591A AU645150B2 AU 645150 B2 AU645150 B2 AU 645150B2 AU 88535/91 A AU88535/91 A AU 88535/91A AU 8853591 A AU8853591 A AU 8853591A AU 645150 B2 AU645150 B2 AU 645150B2
- Authority
- AU
- Australia
- Prior art keywords
- conveyor belt
- frame
- rollers
- tilt
- training idler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Structure Of Belt Conveyors (AREA)
Description
CT/AU91/00488
- 1 -
IMPROVEMENTS IN BELT CONVEYOR TRAINING IDLERS
This invention relates to improvements in training idlers for belt conveyors.
With conventional training idlers, the motion of the idler training the belt is generally restricted to a slewing action about a central vertical axis normal to the width of the belt.
The angle between the training roller and the belt generates a lateral re-aligning influence on the belt that has become misaligned from its central position due to other influences.
The idler slewing frame is normally driven by servo rollers on either side of the belt, which in turn are activated by the belt as it misaligns laterally. The re-aligning influence that a training idler of this configuration can exert on the belt is limited by
SUBSTITUTE SHEET
the single degree-of-freedom of training movement available to the idler and the frictional force that can be developed between the belt and the training idler.
The invention described below is designed to overcome this limitation by introducing an additional degree- of-freedom of training movement, which enables the idler to tilt sideways about an axis parallel to the conveyor, at the same time as it slews, thus considerably increasing the re-aligning influence exerted on the belt. This facilitates considerable cost savings, by enabling a single training idler to do the work of multiple training idlers of conventional design.
One form of the invention is represented in t e accompanying drawing. Fig. i. As the belt 1 misaligns sideways relative to its direction of travel 2, it comes into contact with one of the two side mounted servo rollers 3. The said servo idlers are attached to the tilt frame 4, which in turn supports the belt support roller 5. The force exerted on the said servo idler causes the tilt frame / belt support roller assembly to rotate about an axis 6, normal to the width of the said conveyor belt, generally referred to as slewing
motion .
The said tilt frame also has guide rollers 7, mounted at each end, and these correspond to tracks 8, at either end of the base frame 9. The said tracks are inclined at an angle to the said direction of belt travel.
The said tilt and base frames are connected by a plain spherical bearing 10, and shaft assembly which behaves as as a ball joint, permitting all three angular degrees-of-freedom.
Support rollers at each end of the shaft 11, limit one of these angular degrees-of-freedom, and prevent the said tilt frame/belt support roller assembly from collapsing onto the said base frame. As the said assembly begins to slew, the said guide roller on the opposite side to the direction of belt misaligning movement comes into contact with the underside of the corresponding said track, and is driven down the said track.
Only one of the two said guide rollers is active and in contact with its said track at any time.
The movement of the said active guide roller lowers the near side of the said tilt frame / belt support roller assembly, and raises the far side, thus causing the said assembly and said conveyor belt to rotate about an axis 12, substantially parallel to the said direction of belt travel, generally referred to as a tilting motion.
This generates two additional re-aligning influences ;
(a) It creates variable tension across the said conveyor belt, with lower tension on the near side and higher tension on the far side, inducing a tendency for the said conveyor belt to return to its central position to equalise the tension across the said conveyor belt.
(b) It enhances the re-aligning effect of the said slewing component of motion, by creating a downward path for the said conveyor belt.
This invention is designed to work in either the top or bottom belt strands of the conveyor, and with the said conveyor belt in a variety of configurations.
The flat belt support roller depicted in Fig. 1 can be replaced by two-roll, vee configuration idlers, or multiple roll trough configuration idlers.
085 The ratio between slew and tilt angles can be regulated by varying the angle of inclination of the said tracks.
The track angle is adjustable by means of rotating the said tracks about a pivot point on the track support
090 plate 14.
The said guide rollers and tracks may be arranged in a number of alternative configurations, for example ;
(a) With the said tracks fixed to the said tilt frame and the said guide rollers fixed to the said base
095 frame.
(b) With the said guide rollers running on the top side of the said tracks as opposed to the underside of the said tracks as depicted in Fig. 1.
The single servo rollers depicted in Fig. 1 can be 100 replaced by multiple servo roller assemblies 13, with the assemblies pivoting on a shaft 16,
about axes normal to the belt.
In order to distribute the load evenly between individual rollers, the multiple servo rollers are 105 mounted on walking beams 15.
This reduces the edge pressure on the said conveyor belt, and enables each training idler to do considerably more work without damaging the said conveyor belt.
110 The lateral distance between said servo rollers and edges of said conveyor belt, may be adjusted by means of an adjustment screw 17.
This enables variation within a nominal belt width to oe accommodated, and also enables the sensitivity of
115 the training idler to be adjusted by varying the amount of lateral misalignment of the said conveyor belt required to activate the training idler.
Claims (13)
1. Conveyor belt training idler for correcting the lateral misalignment of moving conveyor belts, said training idler comprising a mechanism which senses the said lateral misalignment of the conveyor belt and rotates the said conveyor belt sideways about an axis substantially parallel to the direction of conveyor belt travel, in order to exert a realigning influence on the said conveyor belt, said rotation being referred to in subsequent claims as tilting.
2. Conveyor belt training idler as claimed in Claim 1, wherein the said mechanism includes :
a base frame mounted independently of the said conveyor belt ; and a second frame, supporting a roller or rollers upon which the width of the said conveyor belt runs, and connected to, or mounted on the said base frame, whereby said second frame tilts relative to said base frame, said second frame being referred to in subsequent claims as the tilt frame.
3. Conveyor belt training idler as claimed in Claim 2, wherein the said mechanism also includes a means of rotating the said tilt frame relative to said base frame, about an axis substantially normal to the said width of conveyor belt, (referred to in subsequent claims as slewing) .
4. Conveyor belt training idler as claimed in Claim 3, wherein the said mechanism also includes :
a means of mounting the said base frame so that it is stationary, relative to the said conveyor belt ;
a means by which the said tilt frame pivots on the said base frame ; and a roller mounted adjacent to each edge of the said conveyor belt and attached to the said tilt frame, said rollers sensing lateral movement of the said conveyor belt, and inducing a slewing action in the said tilt frame, said rollers being referred to in subsequent claims as servo rollers.
Conveyor belt training idler as claimed in Claim 4, wherein the said mechanism also includes :
a track on each side of the said conveyor belt, attached to the said base frame, and inclined at an angle to the direction of conveyor belt travel ;
a roller attached to each side of the said tilt frame and rolling on the said tracks, said rollers being referred to in subsequent claims as tilt rollers, and by interacting with the said tracks, converting a portion of the slewing input from the said servo rollers into tilting.
Conveyor belt training idler as claimed in Claim 4, wherein the tracks described in Claim 5 are mounted on the tilt frame, and the said tilt rollers are mounted on the said base frame.
7. Conveyor belt training idler as claimed in either
Claims 5 or 6 , and including a means of adjusting the said angle of incline of the said tracks such that the said portion of slewing input converted to tilting can be varied.
8. Conveyor belt training idler as claimed in any of
Claims 5, 6 or 7 , wherein the dual tracks and rollers described are replaced with a single track and roller,
9. Conveyor belt training idler as claimed in any previous claim, wherein the pivot referred to in Claim 4 permits only the tilting and slewing angular degrees of freedom, of the said tilt frame relative to the said base frame.
10. Conveyor belt training idler as claimed in Claim 9, wherein the pivot includes ;
a spherical plain or rolling-element bearing mounted to either the said tilt frame or base frame, and permitting all three said angular degrees of freedom ; a shaft through the said spherical bearing, connecting the said base frame to the said tilt frame ; and
a roller on each side of the said spherical bearing, and mounted on the said shaft, said rollers allowing only the said tilting and slewing degrees of freedom by bearing against the opposite frame to which the said spherical bearing is mounted, said spherical bearing being mounted in either the said tilt or base frames.
11. Conveyor belt training idler as claimed in any previous claim, wherein the single servo rollers described in Claim 4 are replaced by multiple units of two or more individual rollers in order to distribute the load on the edge of the said conveyor belt.
12. Conveyor belt training idler as claimed in any previous claim, wherein the servo roller units described in either Claims 4 or 11 are mounted by a means which permits the distance between the said servo rollers and said conveyor belt to be adjusted, in order to accommodate variations within a nominal conveyor belt width, and to adjust the amount of said lateral misalignment of the said conveyor belt required to activate the training idler,
13. Conveyor belt training idler substantially as described herein with reference to the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU88535/91A AU645150C (en) | 1990-10-23 | 1991-10-22 | Improvements in belt conveyor training idlers |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPK2959 | 1990-10-23 | ||
AUPK295990 | 1990-10-23 | ||
AU88535/91A AU645150C (en) | 1990-10-23 | 1991-10-22 | Improvements in belt conveyor training idlers |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU72924/94A Division AU658110B3 (en) | 1990-10-23 | 1994-09-13 | A belt conveyor training idler |
Publications (3)
Publication Number | Publication Date |
---|---|
AU8853591A AU8853591A (en) | 1992-05-20 |
AU645150B2 true AU645150B2 (en) | 1994-01-06 |
AU645150C AU645150C (en) | 1999-09-09 |
Family
ID=
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1057016B (en) * | 1957-02-26 | 1959-05-06 | Sundwiger Eisen Maschinen | Device for the laterally correct feeding of a tape under tension |
GB1040565A (en) * | 1961-10-20 | 1966-09-01 | Coal Industry Patents Ltd | Conveyor belt centralising device |
FR2586235A1 (en) * | 1985-08-19 | 1987-02-20 | Urrizalqui Urquia Serge | Electromechanical system for automatic centring of the bands of belt conveyors |
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1057016B (en) * | 1957-02-26 | 1959-05-06 | Sundwiger Eisen Maschinen | Device for the laterally correct feeding of a tape under tension |
GB1040565A (en) * | 1961-10-20 | 1966-09-01 | Coal Industry Patents Ltd | Conveyor belt centralising device |
FR2586235A1 (en) * | 1985-08-19 | 1987-02-20 | Urrizalqui Urquia Serge | Electromechanical system for automatic centring of the bands of belt conveyors |
Also Published As
Publication number | Publication date |
---|---|
AU8853591A (en) | 1992-05-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GD | Licence registered |
Name of requester: TASMAN-WARAJAY PTY LTD. |
|
PC | Assignment registered |
Owner name: FLEXIBLE STEEL LACING COMPANY Free format text: FORMER OWNER WAS: TASMAN ENGINEERS PTY LTD |