US1850891A - Belt conveyer - Google Patents

Description

T G. NYBORG BELT CONVEYER March 22, 1932.

Filed March 25, 1930 2 Sheets-Sheet.

HTTOH/VEV March 22, 1932.

T. G. NYBORG BELT GONVEYER Filed Maroh-25, 1930 2 Sheets-She et 2 Patented Mar. 22, 1932 UNITED ST TE PATENT OFFICE rear. enone NYBORG, or WORCESTER, ENGLAND, ASSIGNOR or ONE-HALF '10 MARK FREDERICK HIGGINS, or WORCESTER, ENGLAND BELT CONVEYER Application filed. March 25, 1930, Serial No 438,874, and in Great Britain March 27, 1929. V

This invention relates to conveyers of the kind employing endless travelling belts; It has already been proposed in such conveyers to provide a pair of anti-spillage shelves running in the direction of the length of the conveyer below the two edges of the belt, the belt resting on the said shelves when loaded, or on material gatheredthereon.

It is an object of the present invention to provide an improved form of. shelf construction in which, theanti-spillage shelves are provided with inner downwardly directed It is a further object ofthe inventionto provide bearings for the supporting rollers belt so that any' spillage from the belt is thrown clear of them and the upper surfaces of which form with the interrupted sections of the anti-spillage shelves a continuous channel to collect dust and small particles thrown ofi the belt.

It is a further object of the invention to provide an .improved construction whereby the supporting frame may be adapted to support to. the anti-spillage shelves and bearings ofthe above-mentioned kind.

The invention isillustrated in the accompanying drawings in which i Figure 1 illustrates a general view of a conveyer according to the present invention, Figure 2 represents a side view, and Figure 3 a plan of a preferredform. Figure 4 is a side sectional view. of Figure 2 taken on the line 1v 1v,

I Figure 5 is a perspective v1ew shown separately of a member utilized in Figs. 2 to 4, and

Figure 6 shows a view of the loaded belt to a smaller scale.

Referring now to the form illustrated, the conveyer sections are supported by frames 1 spaced at intervals in known manner. The flattened tops of the frames 1 are holed at 2 toreceive a bolt 3 having a shoulder 4. An .L-shaped metal section 5 is supported on the 50. shoulder 4, and an L-shaped platefi rests on which are located beneath thewidth of thethe web of the section 5, the'plate 6 being.

riveted to and supporting a second L-shaped metal section 7 which extends in line with the metal section 5 to, form .a structural support for the side plates 8 of the c'onveyer which are attached to the sections by rivets, the joints between ,adacent side plates being closed by bridge pieces 9. The end of the right hand plate 8 is cut square as shown in Fig. 2, but the end ofthe oppositely placed left hand side plate of this figure is cut away as shown at 8a. The vertical web of the section 5 is also cut away as 'shown at 5a,

The side plates 8 carry the anti-spillage shelves which comprise downwardlydirected inner portions 11 extending inwards towards the middle line of the 'conveyer at an angle of about to the horizontal. The oblique inner portions of the anti-spillage shelves are surmounted at their outer upward ends by curved portions, 12 which areupwardlyj convex i. e. they are arcuate so that the upwardly extending portions 11 gradually curve off into horizontal elements. In the form shown the curvilinear portion is extended beyond the upper horizontal element until it ultimately forms a downwardly directed element 13 which serves as a means of attachment for the anti-spillage shelf to the side plates 8 by the intermediary of rivets 14;.

It is understood that the anti-spillage shelves are formed in interrupted sections extending between adjacent bearings for the supporting rollers 15 for the belt 16, their downwardly directed webs being cut away obliquely as shown in Figs. 2 and 3 on the side of each bearing so that the bearings and shelves form a continuous channel to prevent material from falling onto the lower belt length.

from ,the bolts 8 in a manner which will now be described. One of the bearings 20 isshown separately in Fig. 5 in perspective view, from which it will be seen that the bearing proper comprises a block or casting provided with a central slot 22 to receive the spindle of the The bearings 20, 21- Fig. 3, are supported 7 roller 15; the opposite bearings 21 are preferably closed it being assumed that the coal orothermaterial is thrown on the belt towards shaped to lie snugly undenthe-upper part 2 of the frame 1, thecentral;portion-being.

holed to receive the lower threaded'end o1 bolt 3 on which it is supported in the 'asse'm bled position by means of a nut 27.

The blockportion 20 of thecastingis pro-- vided on each side with a lug 30, 31 shaped to the curvature of the parts 12, 18 of'the antispillage Sl'l'BlVStO form" supports for' the ends" o'f these shelves. As clearly shown in Figures 3 and 4, the bearings 22 are located beneaththe extended widthotthe belt 16 so that any spillage falling over" the edge" of the" belt intermediate the shelves will fall down the inclined face 23 of the casting and be prevente'd'froni' clogging'up the bearing for-the roller 5. Other debris remainingbet'w'een theside plates 8 will remain on the shelves or be picked up'again by'the belt as its movement fluctuates.

I'n the normal'unloaded position, the belt l6lie'sjfust cl ar'otthetopotthe portion 12 of the an'ti s'pillage shelves which are only slightly lower than the tops of the rollers 15', 19, but when loade'dth'e belt is depressed and; contacts lightly with the anti-spillage shelves. As the belt is usually unevenly loaded, it'will' curve more or'less as it travels and willmake'a sliding contact with the arcuate" portions 12"of the shelves; Further, the belt usually swings from side to' side as it travels, and here again the margins ofthe belt will slide smoothlyup and downthearcth ate portions 12, making acontinuous seal against thepossibility' of dbris falling down the shelves between the side plates. Debris will,- of course, collect in theangl'e between the portions' 13" and theside plates but it cannot fall clear, and when the amount is'ex'cessive, it will be pushed about a little by the edges of th'e'belt during lateral swinging and will finally be caughtup again by the belt and carried away. Figure- 6 shows the belt under excessive loading at a local point, and will be seen that as the belt recovers from this curv'easit approaci'iesa-roiler 15*, it will continuously prevent debris from falling un'de' r'the' edges. Owin'g't'o the obliquity of theinwardly inclined portion 11 of the anti spillage shelves, the belt is caused to take a substantially concave cross section which results inthrowing the material down into the centre of the belt. The result is that those portions of the belt edges which actually rub along the portions 11 of the anti-spillage shelves are: not engaged therewith with any substantial amount of friction such, for example, as they would be if the shelves were horizontal and the end portions of the belt which rested upon them were actually supporting some of the material. The clearance between the shelves and the belt in the ui'i'loa'dr'ad' position is designed sothat the amfount-ofrubbing between the belt and the shelves when the belt is loaded may be light without unduly increasing the endwise. ten: siononth'ebelt... Nevertheless, the belt definitely contacts with the shelves under all working-conditions of load since its edges are adapted to form a sliding contact with the arcuate" portions: 12. of the shelves." Thus, when the belt is loaded lightly its edges contact with the upper parts ofthe portions 12, and when it isloaded more heavily they contact-with the'lower parts of theportions 12.

Figure 6 shows the fihal' position under. a

maxiinu nworkingload 'at'a point intermediate a pairof supporting-rollers 15'. In this position theedges of the-belt contactf'or aslight distance rectilinearly with the oblique rectilinear portions'll of the shelves.

pared with the saving which is eff'ected'in cleaning'up. i. e. freeing thebearings and returning idle belt length from spillage which" is otherwiseliable'to collect unless'the belt is enabled to contact withthe shelves in'all conditions ofload, which'requirement is ensured by the provision of'the arcuate portions 12';

with whichthe moving belt is enabled tomalie asliding cont'act'as it lifts and sags and sways from sidetoside;

1. Forusein a belt conveyer, a casting including; a bearinirfor a,roller, a pair-of supports for anti spillage shelves, and a webfor attachment to a supporting" frame.

2; ln'azbelt conveyer, the combination ofa belt, supporting rollers therefor, interrupted arcuate anti-spillage shelves with which the belt can make a contact according to itsload, and bearings for said rollers located beneath the belt and forming a continuous channel with said shelves.

3. In a belt conveyer, the combination of a belt, supporting rollers therefor, interrupted anti-spillage shelves below the beltedges, and bearings for said rollers located beneath the=bel-t', said bearings forming a continuous channel with said shelves.

t. A belt conveyer including a belt, rolling supports for'the' belt, anti-spillage shelves for cooperation with the edges of the belt supported intermediate the rollers, said shelves including arcuate portions underlying and extending beyond the edges of the belt. the arcuate portions of the shelves providing for sliding movement of the belt during travel without separation of the belt edges from such shelves.

5. In a belt conveyer, a belt, roller supports therefor, and anti-spillage shelves supported intermediate the rollers and including a rounded area directly underlying the free edges of the belt and providing a belt contacting surface to facilitate sliding movement of the belt without separation, the shelves including a substantially flat area inwardly of the rounded area.

6. In a belt conveyer, a belt, roller supports therefor, and anti-spillage shelves supported intermediate the rollers and including a rounded area directly underlying the free edges of the belt andproviding a belt contacting surface to facilitate sliding movement of the belt without separation, the shelves including a substantially flat, inwardly and downwardly inclined area. 1

In testimony whereof I alfix my signature.

TAGE GEORG NYBORG.

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