CA1279839C - Roof mounted conveyor idler frame - Google Patents
Roof mounted conveyor idler frameInfo
- Publication number
- CA1279839C CA1279839C CA000546751A CA546751A CA1279839C CA 1279839 C CA1279839 C CA 1279839C CA 000546751 A CA000546751 A CA 000546751A CA 546751 A CA546751 A CA 546751A CA 1279839 C CA1279839 C CA 1279839C
- Authority
- CA
- Canada
- Prior art keywords
- idler
- frame
- conveyor
- chain
- return
- 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 - Fee Related
Links
Abstract
ABSTRACT
Conveyor idler supports and spacing members are disclosed that can be secured to a downwardly facing surface or framework, and adjusted laterally and vertically to facilitate accurate alignment of adjacent idlers in a series. Installation is facilitated, since accuracy in boring securing holes in the downwardly facing surface is less critical than with prior art conveyor support structures, in both the lateral and longitudinal directions. Also disclosed are spacer assemblies for accurately spacing adjacent idler supports. Means are provided for easy adjustment of idler frames after installation.
Conveyor idler supports and spacing members are disclosed that can be secured to a downwardly facing surface or framework, and adjusted laterally and vertically to facilitate accurate alignment of adjacent idlers in a series. Installation is facilitated, since accuracy in boring securing holes in the downwardly facing surface is less critical than with prior art conveyor support structures, in both the lateral and longitudinal directions. Also disclosed are spacer assemblies for accurately spacing adjacent idler supports. Means are provided for easy adjustment of idler frames after installation.
Description
~.,7~8~3 FIELD OE' THE INVENTION
This inven-tion relates to idler frames for conveyors, and is related to copending Canadian application No. 490,661 filed September 23, 1985.
DESCRIPTION OF THE PRIOR ART
In mines, it is common practice to install conveyor belts for moving mined material from the workface to a mine shaft, where it can be loaded into an elevator to be removed from the mine. Some such conveyors are floor mounted, but in some situa-tions roof mounted conveyor systems are desired, to maximize the free floor area in the mine and to facilitate cleaning around and under the conveyors~
Prior art roof mounted conveyor structures consist of sections of cable mounted hardware of 200 to 400 feet in length, comprising means to anchor two parallel tensioned cables at each end of each section, multiple intermediary roof moun-ted brackets with chain hangers to suspend the cables hori~ontally and conveyor idler frames mounted on and hanging ~rom the wire cables by various clamping and chain hanger means.
Such roof mounted structures require, for installation, accurate control survey reference lines longitudinally, because lateral adjustment of the support structure is impossible after initial installation. Extension of such structure is necessarily ; by "jumps" of 200 to 400 feet in length, and is labour intensive, requiring tha accurate location and drilling of holes and assembly of structure components. Conveyor shut down time is required to complete the tie-in of a new section. These constraints prevent ~` ~
33~3 roof mounted s~ructure from ~eirlg used in extensible conveyor mining applications.
Consequently, conveyor idler frames standing on the mine floor are often used, usually resulting in poor alignment of the frames, poor belt training because of uneven floor and/or side slopes, and frequent tipping over o stands with consequent material spillage, damage to the conveyor belt and production delays. Con~-entional roof mounted conveyor structure in mining is typically used only for loading at fixed locations along the slde or at the tail end. Applications in which a variable or traversing loading point from the side is required dictate the aforesaid use o~ f loor mounted conveyor structure with all of their inherent disadvantages to the mining operation. The above copending application solves many of the problems of the prior art, and the present application is directed to a further improvement.
SUMMARY OF TH~ lNV~N~ION
The present invention provldes a conveyor idler of the type comprising, first means for securing an idler frame to a downwardly facing surface in an area whereln the conveyor is to be deployed; suspension means for mounting the idler rame to the first means, idler rollers mounted on the idler frame for supporting a conveyor bel~; spacer rod means for connecting the ldler frame to an adjacent idler frame spaced therefrom; locking means on the idler frame for detachably securing the spacer rod means to the idler frame; adjustment means for varying the location of the suspension means relative to the first means so ~,7~3~3~3'3 that the idler frame is movable transver6ely of the conveyor belts; said adjustment means also providiny for varying the height of the idler frame relative to the first mean.s; whereby the first means may~ during initial installation, be secured to the surface in an approximately correct location permit~ing adjustment of the suspension means to dispose the idler frame in line with adjacent idler frames and the conveyor belt centre line in both the horizontal and vertical planes, and further adjustment means between the idler frame and the suspension means providing for a further adjustment of the idler frame relative to the downwardly facing surface after installation of the conveyor idler.
According to another aspect of the invention, there is provided a system of conveyor idlers for suspension from a mine roof in a string, the system comprising: (i) hanger brackets for attachment transversely of a mine roof~ each bracket having a plurality of chain attachment means spaced therealong, (ii) chain means for attachment to the chain attachment means at a selected location, (iii) frame means bearing idler rollers for attachment to the chain means for supporting a conveyor belt on its conveylng reach, ~iv) spacer rod means for connecting adjacent frame means in a string to maintain adjacent frame means at a fixed but adjustable spacing, (v) locking means on the frame means for detachably securing an end of a spacer rod to its respective frame, (vi) return reach idler rollers secured to each frame means for supporting a conveyor belt on its return reach, and (vii) further adjustment means bet~een the frame means and the chain means.
3;33~
BRIEF D~SCRIPTION OF THF DRAWINGS
Other features and characteristics o~ the invention will become appaxent from the fo].lowing specifications, when read in conjunction with ~he accompanying drawings, in whi~h:
3a 38~3f3 Figure 1 is a front elevation of an embodiment of a conveyor idler frame secured to a mine roof, Figure 2 i8 a side elevation, viewed from the right in Figure 1, of the construction of Figure l;
Figure 3 is a detailed view of a wedge clamp for the spacer bars of Figures 1 and 2, Figure 4 is a detailed view of the frame pivot and wedge clamp;
Figure 5 and 6 are alternative support means for the conveyor idler frame.
DESCRIPTION OF THE PREFERRED E~lBODIMENTS
The illustrated embodiment comprises an angle bar or bracket formed from steel stock 10 adapted to be secured by e.g.
bolt 24 and anchor 23 to a mine roof 33. The bar or bracket 10 is adapted -to be disposed transversely of the conveyor belt, and is provided with a series of keyhole-shaped slots 22 of basically circular configuration, with a downwardly depending slot 22a for receiving a chain link.
A pair of heavy chains 12, 12' are adapted to be passed, one through each of the openings 22, so that individual links of ~he chain can drop into the slots 22a. The chains 12, 12' are thus locked in position, with vertical and horizontal location as required.
Secured to the lower ends of the two chains 12, 12' eyes 32, 32' is a pair of plates 14, 14' bridged by a tubular roller support frame 13, welded to plates 14, 14'. In a manner known in the art, idler rollers 16 are mounted for free rotation on frame ~ 3 13. The rollers 16 do not form part of the invention are well known in the art and therefore they need not be described in detail.
In a pair of openings 19, 19' in the plates 14, 14' respectively are chains 18, 18' for supporting a return roller 17.
The latter is journalled in known manner in steel fish plates 31, 31' secured to the lower ends of the chains 18, 18'.
As can be seen more clearly from Figure 2, rigid spacer rods or bars 21, 21' are adapted to be secured by clamping assemb-lies 15, 15' to the sides of each idler frame to fix the distance,usually 5 feet, between adjacent idlers in a string in a mine.
These spacer rods, which may be tubular, and are of nominal 6' length, are releasably attached to the plates 14, 14'. The clamp-ing assemblies 15, 15' are identical on each side of the idler frame so that only one, 15', needs to be described.
: Securely welded to plate 14' is a tongue 25 (Figure 3 and 4) which is provided with an opening 30 closely adjacent the plate 14'. The opening is adapted to receive the rods 21, 21'.
A rectangular opening 29 is provided in the tongue, centrally of the opening 30.
A plate 26 is also provided, with a slot 34 therein of a size to mate with the cross-section of the tongue 25. The plate 26 is placed over the tongue where it may rest against the rodes 21, 21'. A wedge 28, which engayes in the slot 29, is then driven into position to lock the plate 26, and thus the rods 21, 21', firmly in position.
In manuEacture of this assembly, the tongue is first 3~3 welded to a plate 14 or 14'. Then, a plate 26 is placed over the tongue. A wedge 28 is inserted in the slot 29. Since wedges of this type are frequently lost in mining operations, it is neces-sary to ensure that it is not possible to remove the wedge any more than is desired, i.e., from its locking position to its release position. To prevent such loss, a U-shaped handle 27 is welded to the ends of the wedge 28 directly after the latter is placed in the slot, and the plate 26 placed over the tongue 25.
By this means, an assembly is provided that freely permits disen-gagement or engagement of the wedge 28 without risk of its remov-al, and the removal of the plate 26, from the structure and their consequent loss.
In Figures 5 and 6, there is disclosed an alternative method of securing the chains to a typical mine support structure (not shown) for transverse adjustment. In Figure 5, an I beam 80 of the support structure having a web 81 and upper and lower flanges 82 and 83 is a cross member of known support structure, and attached to the lower flange of the I-beam is a hanger com-prising left hand and right hand elements 85 and 86 (Figure 6) secured together by nuts and bolts 87 to engage the lower flange ! 83 of the I-beam securely. As in Figure 1, keyhole shaped open-ings 22 are provided for securing a link of a chain. In this case, however, transverse adjustment is provided by loosening the bolts 87 and sliding the hanger along the lower flange of the I-beam.
It should be noted that as with the embodiment of Figure 1, more than one anchor may be used,especially if the inteyrity of 33'~3 the mine roof 33 is in doubt.
In figure 1, it will be noted that the plates 14, 14' are welded to the frame 13 normal to the outer frame elements. As can be seen from figLIre 2, the plates 14, 14' each include an upper opening 35, 35' through which the chains 12, 12' can pass.
At the terminal ends of the chains 12, 12' are secured hooks 36, 36'. Thus, a chain such as 12' can be passed through the opening 35' (figure 2) and the hook 36' secured through one of the links of the chain 12', providing for adjustment of the height of the respective side of the frame 13, link by link, supplementing the adjustment provided by selective use of the chain 12 or 12' and the keyhole slots 22 in the element 10. The plates 14, 14' are provided at the:ir lower ends with an opening 37 having a plurality of downwardly extending slots 38 for selectively receiving a chain link of the chain 1~ or 18' used for suspending the return idler 17. The combination of the openings 37, slots 38, and chains 18, 18' provide for rotation about a vertical axis of the point of suspension of the return idler 17 for precision of alignment of a conveyor belt on its return reach. It can thus be seen that a desirable result is achieved in that four points of adjustment are provided for the main idler frame 13, i.e., the chains 12 and 12' can each be secured in a different opening 22 in the element 1~ to provide for both lateral and vertical adjustment, and likewise the chains 12, 12' can be vertically adjusted in relation to the plates 14, 14' on the frame 13. The adjustment on the plates 14, 14' is much easier -to carry out on the job in a mine where the roof 33 may be as high as 10 feet -from the floor. Thus, if in 983~3 operation it is perceived that a vertical adjustment is required, this can easily be carried out by supporting the frame 13, elevat-ing it to loosen the respective chain, and securing a hook 36 or 36' in a higher or lower chain link~ Likewise, in addition to providing for vertical adjustment of the return idlers 17 by selecting the appropriate link in the chains 18, 18' to insert in the openings in the plates 14 and 14', the provision of, in effect, multiple hanging points avoids potential problems caused by misaliynment of the return idlers 17 in relation to the return reach of the conveyor belt, which problems can be dealt with by selecting the appropriate slot 38 from which to hang the chain 18 or 18'.
As is well known to those skilled in the art, idler frames o~ the general type disclosed above are normally spaced apart by 5 foot intervals. Thus, the spacer rods 21, 21' will have a nominal 6 foot length to allow for overlap and proper securement to the idler Erames 13.
The rods may be bar stock, but are pre~erably three quarter inch standard pipe.
It can thus be seen that the present invention provides an idler roller assembly that can be cheaply constructed, can readily be adjusted, precisely, vertically in relation to the mine shaft roof, and longitudinally and transversely of the mine shaft, without requiring any special skills on the part of the person installing the apparatus and without requiring special tools.
,....... .. ....
This inven-tion relates to idler frames for conveyors, and is related to copending Canadian application No. 490,661 filed September 23, 1985.
DESCRIPTION OF THE PRIOR ART
In mines, it is common practice to install conveyor belts for moving mined material from the workface to a mine shaft, where it can be loaded into an elevator to be removed from the mine. Some such conveyors are floor mounted, but in some situa-tions roof mounted conveyor systems are desired, to maximize the free floor area in the mine and to facilitate cleaning around and under the conveyors~
Prior art roof mounted conveyor structures consist of sections of cable mounted hardware of 200 to 400 feet in length, comprising means to anchor two parallel tensioned cables at each end of each section, multiple intermediary roof moun-ted brackets with chain hangers to suspend the cables hori~ontally and conveyor idler frames mounted on and hanging ~rom the wire cables by various clamping and chain hanger means.
Such roof mounted structures require, for installation, accurate control survey reference lines longitudinally, because lateral adjustment of the support structure is impossible after initial installation. Extension of such structure is necessarily ; by "jumps" of 200 to 400 feet in length, and is labour intensive, requiring tha accurate location and drilling of holes and assembly of structure components. Conveyor shut down time is required to complete the tie-in of a new section. These constraints prevent ~` ~
33~3 roof mounted s~ructure from ~eirlg used in extensible conveyor mining applications.
Consequently, conveyor idler frames standing on the mine floor are often used, usually resulting in poor alignment of the frames, poor belt training because of uneven floor and/or side slopes, and frequent tipping over o stands with consequent material spillage, damage to the conveyor belt and production delays. Con~-entional roof mounted conveyor structure in mining is typically used only for loading at fixed locations along the slde or at the tail end. Applications in which a variable or traversing loading point from the side is required dictate the aforesaid use o~ f loor mounted conveyor structure with all of their inherent disadvantages to the mining operation. The above copending application solves many of the problems of the prior art, and the present application is directed to a further improvement.
SUMMARY OF TH~ lNV~N~ION
The present invention provldes a conveyor idler of the type comprising, first means for securing an idler frame to a downwardly facing surface in an area whereln the conveyor is to be deployed; suspension means for mounting the idler rame to the first means, idler rollers mounted on the idler frame for supporting a conveyor bel~; spacer rod means for connecting the ldler frame to an adjacent idler frame spaced therefrom; locking means on the idler frame for detachably securing the spacer rod means to the idler frame; adjustment means for varying the location of the suspension means relative to the first means so ~,7~3~3~3'3 that the idler frame is movable transver6ely of the conveyor belts; said adjustment means also providiny for varying the height of the idler frame relative to the first mean.s; whereby the first means may~ during initial installation, be secured to the surface in an approximately correct location permit~ing adjustment of the suspension means to dispose the idler frame in line with adjacent idler frames and the conveyor belt centre line in both the horizontal and vertical planes, and further adjustment means between the idler frame and the suspension means providing for a further adjustment of the idler frame relative to the downwardly facing surface after installation of the conveyor idler.
According to another aspect of the invention, there is provided a system of conveyor idlers for suspension from a mine roof in a string, the system comprising: (i) hanger brackets for attachment transversely of a mine roof~ each bracket having a plurality of chain attachment means spaced therealong, (ii) chain means for attachment to the chain attachment means at a selected location, (iii) frame means bearing idler rollers for attachment to the chain means for supporting a conveyor belt on its conveylng reach, ~iv) spacer rod means for connecting adjacent frame means in a string to maintain adjacent frame means at a fixed but adjustable spacing, (v) locking means on the frame means for detachably securing an end of a spacer rod to its respective frame, (vi) return reach idler rollers secured to each frame means for supporting a conveyor belt on its return reach, and (vii) further adjustment means bet~een the frame means and the chain means.
3;33~
BRIEF D~SCRIPTION OF THF DRAWINGS
Other features and characteristics o~ the invention will become appaxent from the fo].lowing specifications, when read in conjunction with ~he accompanying drawings, in whi~h:
3a 38~3f3 Figure 1 is a front elevation of an embodiment of a conveyor idler frame secured to a mine roof, Figure 2 i8 a side elevation, viewed from the right in Figure 1, of the construction of Figure l;
Figure 3 is a detailed view of a wedge clamp for the spacer bars of Figures 1 and 2, Figure 4 is a detailed view of the frame pivot and wedge clamp;
Figure 5 and 6 are alternative support means for the conveyor idler frame.
DESCRIPTION OF THE PREFERRED E~lBODIMENTS
The illustrated embodiment comprises an angle bar or bracket formed from steel stock 10 adapted to be secured by e.g.
bolt 24 and anchor 23 to a mine roof 33. The bar or bracket 10 is adapted -to be disposed transversely of the conveyor belt, and is provided with a series of keyhole-shaped slots 22 of basically circular configuration, with a downwardly depending slot 22a for receiving a chain link.
A pair of heavy chains 12, 12' are adapted to be passed, one through each of the openings 22, so that individual links of ~he chain can drop into the slots 22a. The chains 12, 12' are thus locked in position, with vertical and horizontal location as required.
Secured to the lower ends of the two chains 12, 12' eyes 32, 32' is a pair of plates 14, 14' bridged by a tubular roller support frame 13, welded to plates 14, 14'. In a manner known in the art, idler rollers 16 are mounted for free rotation on frame ~ 3 13. The rollers 16 do not form part of the invention are well known in the art and therefore they need not be described in detail.
In a pair of openings 19, 19' in the plates 14, 14' respectively are chains 18, 18' for supporting a return roller 17.
The latter is journalled in known manner in steel fish plates 31, 31' secured to the lower ends of the chains 18, 18'.
As can be seen more clearly from Figure 2, rigid spacer rods or bars 21, 21' are adapted to be secured by clamping assemb-lies 15, 15' to the sides of each idler frame to fix the distance,usually 5 feet, between adjacent idlers in a string in a mine.
These spacer rods, which may be tubular, and are of nominal 6' length, are releasably attached to the plates 14, 14'. The clamp-ing assemblies 15, 15' are identical on each side of the idler frame so that only one, 15', needs to be described.
: Securely welded to plate 14' is a tongue 25 (Figure 3 and 4) which is provided with an opening 30 closely adjacent the plate 14'. The opening is adapted to receive the rods 21, 21'.
A rectangular opening 29 is provided in the tongue, centrally of the opening 30.
A plate 26 is also provided, with a slot 34 therein of a size to mate with the cross-section of the tongue 25. The plate 26 is placed over the tongue where it may rest against the rodes 21, 21'. A wedge 28, which engayes in the slot 29, is then driven into position to lock the plate 26, and thus the rods 21, 21', firmly in position.
In manuEacture of this assembly, the tongue is first 3~3 welded to a plate 14 or 14'. Then, a plate 26 is placed over the tongue. A wedge 28 is inserted in the slot 29. Since wedges of this type are frequently lost in mining operations, it is neces-sary to ensure that it is not possible to remove the wedge any more than is desired, i.e., from its locking position to its release position. To prevent such loss, a U-shaped handle 27 is welded to the ends of the wedge 28 directly after the latter is placed in the slot, and the plate 26 placed over the tongue 25.
By this means, an assembly is provided that freely permits disen-gagement or engagement of the wedge 28 without risk of its remov-al, and the removal of the plate 26, from the structure and their consequent loss.
In Figures 5 and 6, there is disclosed an alternative method of securing the chains to a typical mine support structure (not shown) for transverse adjustment. In Figure 5, an I beam 80 of the support structure having a web 81 and upper and lower flanges 82 and 83 is a cross member of known support structure, and attached to the lower flange of the I-beam is a hanger com-prising left hand and right hand elements 85 and 86 (Figure 6) secured together by nuts and bolts 87 to engage the lower flange ! 83 of the I-beam securely. As in Figure 1, keyhole shaped open-ings 22 are provided for securing a link of a chain. In this case, however, transverse adjustment is provided by loosening the bolts 87 and sliding the hanger along the lower flange of the I-beam.
It should be noted that as with the embodiment of Figure 1, more than one anchor may be used,especially if the inteyrity of 33'~3 the mine roof 33 is in doubt.
In figure 1, it will be noted that the plates 14, 14' are welded to the frame 13 normal to the outer frame elements. As can be seen from figLIre 2, the plates 14, 14' each include an upper opening 35, 35' through which the chains 12, 12' can pass.
At the terminal ends of the chains 12, 12' are secured hooks 36, 36'. Thus, a chain such as 12' can be passed through the opening 35' (figure 2) and the hook 36' secured through one of the links of the chain 12', providing for adjustment of the height of the respective side of the frame 13, link by link, supplementing the adjustment provided by selective use of the chain 12 or 12' and the keyhole slots 22 in the element 10. The plates 14, 14' are provided at the:ir lower ends with an opening 37 having a plurality of downwardly extending slots 38 for selectively receiving a chain link of the chain 1~ or 18' used for suspending the return idler 17. The combination of the openings 37, slots 38, and chains 18, 18' provide for rotation about a vertical axis of the point of suspension of the return idler 17 for precision of alignment of a conveyor belt on its return reach. It can thus be seen that a desirable result is achieved in that four points of adjustment are provided for the main idler frame 13, i.e., the chains 12 and 12' can each be secured in a different opening 22 in the element 1~ to provide for both lateral and vertical adjustment, and likewise the chains 12, 12' can be vertically adjusted in relation to the plates 14, 14' on the frame 13. The adjustment on the plates 14, 14' is much easier -to carry out on the job in a mine where the roof 33 may be as high as 10 feet -from the floor. Thus, if in 983~3 operation it is perceived that a vertical adjustment is required, this can easily be carried out by supporting the frame 13, elevat-ing it to loosen the respective chain, and securing a hook 36 or 36' in a higher or lower chain link~ Likewise, in addition to providing for vertical adjustment of the return idlers 17 by selecting the appropriate link in the chains 18, 18' to insert in the openings in the plates 14 and 14', the provision of, in effect, multiple hanging points avoids potential problems caused by misaliynment of the return idlers 17 in relation to the return reach of the conveyor belt, which problems can be dealt with by selecting the appropriate slot 38 from which to hang the chain 18 or 18'.
As is well known to those skilled in the art, idler frames o~ the general type disclosed above are normally spaced apart by 5 foot intervals. Thus, the spacer rods 21, 21' will have a nominal 6 foot length to allow for overlap and proper securement to the idler Erames 13.
The rods may be bar stock, but are pre~erably three quarter inch standard pipe.
It can thus be seen that the present invention provides an idler roller assembly that can be cheaply constructed, can readily be adjusted, precisely, vertically in relation to the mine shaft roof, and longitudinally and transversely of the mine shaft, without requiring any special skills on the part of the person installing the apparatus and without requiring special tools.
,....... .. ....
Claims (13)
1. In a conveyor idler of the type comprising:
first means for securing an idler frame to a downwardly facing surface in an area wherein the conveyor is to be deployed;
suspension means for mounting the idler frame to the first means, idler rollers mounted on the idler frame for supporting a conveyor belt;
spacer rod means for connecting the idler frame to an adjacent idler frame spaced therefrom;
locking means on the idler frame for detachably securing the spacer rod means to the idler frame;
adjustment means for varying the location of the suspension means relative to the first means so that the idler frame is movable transversely of the conveyor belts;
said adjustment means also providing for varying the height of the idler frame relative to the first means;
further adjustment means between the idler frame and the suspension means providing for further adjustment of the idler frame relative to the downwardly facing surface after installation of the conveyor idler whereby the first means may, during initial installation, be secured to the surface in an approximately correct location permitting adjustment of the suspension means to dispose the idler frame in line with adjacent idler frames and the conveyor belt centre line in both the horizontal and vertical planes, and whereby the conveyor idler may be further adjusted, after installation, by the further adjustment means.
9a
first means for securing an idler frame to a downwardly facing surface in an area wherein the conveyor is to be deployed;
suspension means for mounting the idler frame to the first means, idler rollers mounted on the idler frame for supporting a conveyor belt;
spacer rod means for connecting the idler frame to an adjacent idler frame spaced therefrom;
locking means on the idler frame for detachably securing the spacer rod means to the idler frame;
adjustment means for varying the location of the suspension means relative to the first means so that the idler frame is movable transversely of the conveyor belts;
said adjustment means also providing for varying the height of the idler frame relative to the first means;
further adjustment means between the idler frame and the suspension means providing for further adjustment of the idler frame relative to the downwardly facing surface after installation of the conveyor idler whereby the first means may, during initial installation, be secured to the surface in an approximately correct location permitting adjustment of the suspension means to dispose the idler frame in line with adjacent idler frames and the conveyor belt centre line in both the horizontal and vertical planes, and whereby the conveyor idler may be further adjusted, after installation, by the further adjustment means.
9a
2. The conveyor idler defined in claim 1 wherein the first means is an angle bar adapted to be secured to the surface and the suspension means comprises a pair of chains engageable in slots in the angle bar and depending therefrom, the idler frame being secured to the chains.
3. The conveyor idler defined in claim 2 wherein the frame comprises first and second portions, the first portion being secured to the chain or chains and the second portion comprising an idler roller support pivotably attached to the first portion.
4. A system of conveyor idlers for suspension from a mine roof in a string, the system comprising:
(i) hanger brackets for attachment transversely of a mine roof, each bracket having a plurality of chain attachment means spaced therealong, (ii) chain means for attachment to the chain attachment means at a selected location, (iii) frame means bearing idler rollers for attachment to the chain means for supporting a conveyor belt on its conveying reach;
(iv) spacer rod means for connecting adjacent frame means in a string to maintain adjacent frame means at a fixed but adjust-able spacing, (v) locking means on the frame means for detachably securing an end of a spacer rod to its respective frame, (vi) return reach idler rollers secured to each frame means for supporting a conveyor belt on its return reach, and (vii) further adjustment means between the frame means and the chain means.
(i) hanger brackets for attachment transversely of a mine roof, each bracket having a plurality of chain attachment means spaced therealong, (ii) chain means for attachment to the chain attachment means at a selected location, (iii) frame means bearing idler rollers for attachment to the chain means for supporting a conveyor belt on its conveying reach;
(iv) spacer rod means for connecting adjacent frame means in a string to maintain adjacent frame means at a fixed but adjust-able spacing, (v) locking means on the frame means for detachably securing an end of a spacer rod to its respective frame, (vi) return reach idler rollers secured to each frame means for supporting a conveyor belt on its return reach, and (vii) further adjustment means between the frame means and the chain means.
5. A system as claimed in claim 4 wherein the chain attach-ment means of each hanger bracket comprise an opening for receiv-ing a chain, and a slot extending downwardly from the opening for engaging a link of the chain to permit link-by-link vertical adjustment of the chain relative to the opening.
6. A system as claimed in claim 5 wherein the frame means are adjustably secured to lower ends of two chains, each chain being attached to the hanger bracket, whereby selective placement of the chains in the slots of the hanger bracket permits lateral adjustment of the frame means relative to the mine roof.
7. A system as claimed in claim 4 or 5 or 6 wherein the locking means comprise wedges engaging in wedge receiving openings at the lateral extremities of the frame means for wedging the spacer rods against a portion of the frame means.
8. A system as claimed in claim 4 or 5 or 6 wherein the locking means comprise wedges engaging in wedge receiving openings at the lateral extremities of the frame means for wedging the spacer rods against a portion of the frame means, said portion being defined by an opening or openings in the lateral extremities for receiving the spacer rods, and further comprising plate means mating with the lateral extremities, the plate means serving to distribute pressure resulting from driving the wedge means into the wedge receiving opening evenly against a pair of spacer rods.
9. A system as claimed in claim 4 or 5 or 6 wherein the locking means comprise wedges engaging in wedge receiving openings at the lateral extremities of the frame means for wedging the spacer rods against a portion of the frame means, said portion being defined by an opening or openings in the lateral extremities for receiving the spacer rods, and further comprising plate means mating with the lateral extremities, the plate means serving to distribute pressure resulting from driving the wedge means into the wedge receiving opening evenly against a pair of spacer rods, and means secured to the wedge means to prevent removal of the wedge means entirely from the wedge receiving opening.
10. The conveyor idler defined in claim 1 further comprising return idlers for supporting a return reach of a conveyor belt, return idler support chains suspending the return idlers from the idler frame, means for adjusting the return idler support chains relative to the idler frame to adjust the height of the return idlers, said last named means further including means for adjusting the location of the return idlers about a vertical axis relative to the idler frame.
11. The conveyor idler defined in claim 1 or 10 wherein the means for adjusting comprise keyhole-shaped openings in which a chain link may engage.
12. The system defined in claim 4 wherein the return idler rollers are suspended from the idler frame by return idler support chains, and further comprising means for adjusting the return idler support chains relative to the frame means to adjust the height of the return reach idler rollers, said last named means further including means for adjusting the location of the idler rollers about a vertical axis relative to the frame means.
13. The conveyor idler defined in claim 12 wherein the means for adjusting comprise keyhole-shaped openings in which a chain link may engage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000546751A CA1279839C (en) | 1986-09-12 | 1987-09-14 | Roof mounted conveyor idler frame |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US906,828 | 1986-09-12 | ||
| CA000546751A CA1279839C (en) | 1986-09-12 | 1987-09-14 | Roof mounted conveyor idler frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279839C true CA1279839C (en) | 1991-02-05 |
Family
ID=4136430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000546751A Expired - Fee Related CA1279839C (en) | 1986-09-12 | 1987-09-14 | Roof mounted conveyor idler frame |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1279839C (en) |
-
1987
- 1987-09-14 CA CA000546751A patent/CA1279839C/en not_active Expired - Fee Related
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